Index: frontend/node_modules/terser/CHANGELOG.md
===================================================================
--- frontend/node_modules/terser/CHANGELOG.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/CHANGELOG.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,882 @@
+# Changelog
+
+## v5.48.0
+
+ - Support `import source ...` and `import defer ...` (#1682)
+
+## v5.47.1
+
+ - Fix crash when using `mangle.keep_fnames` with destructuring
+
+## v5.47.0
+
+ - Add `builtins_ecma` and `builtins_pure` options
+ - Add Intl options to domprops (#1680)
+
+## v5.46.2
+
+ - `unused` option: delete computed keys of concise methods and getters/setters.
+ - `Error.cause` added to DOM properties list
+ - Don't consider `foo.bar` and `foo["bar"]` to be equivalent when property mangler is enabled with `keep_quoted=strict` option.
+
+## v5.46.1
+
+ - Fix extremely slow (seemed like a freeze) `evaluate` of method chains
+ - Parse extremely large floating-point number literals as `Infinity`
+ - Remove parens from comma expressions in computed property access (`foo[(1, 2)]`)
+
+## v5.46.0
+
+ - Add "observedAttributes" domprop (#1652)
+ - More domprops (mostly `Temporal` related) suggested in #1652
+
+## v5.45.0
+
+ - Produce `void 0` instead of `undefined`, which is more safe
+
+## v5.44.1
+
+ - fix bitwise optimization changing the result of `&&`, `||`
+ - switches: make sure `var` is extracted from a deleted default case
+
+## v5.44.0
+
+ - Support `using` and `await using` declarations (#1635)
+
+## v5.43.1
+
+ - Prevent niche optimizations that would move around block declarations
+ - Add `lhs_constants` to `CompressOptions` type (#1621)
+
+## v5.43.0
+
+ - Do not wrap callbacks in parentheses (`wrap_func_args` format option is now false by default)
+ - Do not inline functions into for loops (for performance reasons)
+
+## v5.42.0
+
+ - Improved performance in the parse step by adding a fast path for simple identifiers.
+ - Improved ESTree conversion
+
+## v5.41.0
+
+ - fixed semicolon insertion between class fields, when the field names are number literals
+ - `keep_numbers` format option now works for bigint
+ - internal: correctly mark accessors' is_generator property
+ - internal: do not read or assign quote properties without need
+ - internal: add missing equivalent_to comparison
+
+## v5.40.0
+
+ - Fix exporting AssignmentExpression (default assign pattern) to ESTree
+ - Fix ESTree output of object keys with quotes
+ - Fix handling of an ESTree empty `export {}` (#1601)
+ - Fix some `const` and `let` resulting from ESTree input (#1599)
+
+## v5.39.2
+
+ - Fix crash when parsing bare `yield` inside a template string.
+ - Update internally used acorn version requirement
+
+## v5.39.1
+
+ - Fix bitwise operations that could mix `BigInt` and `number`
+
+## v5.39.0
+
+ - Remove unnecessary `console.assert` calls (#1590)
+
+## v5.38.2
+
+ - internal: Flatten inheritance tree for object/class members
+
+## v5.38.1
+
+ - Fix inlining non-call expressions into an `optional_call?.()`
+
+## v5.38.0
+
+ - Remove `console` method-of-method calls (eg `console.log.apply()`) when `drop_console` option is used (#1585)
+ - Remove more object spreads, such as `{ ...void !0 }` (#1142)
+
+## v5.37.0
+
+ - Reserved object properties from chrome extensions (domprops)
+ - Fix semicolon insertion between a class property without a semicolon `a` and a computed class property `["prop"]`
+
+## v5.36.0
+
+ - Support import attributes `with` syntax
+
+## v5.35.0
+
+ - Ensure parent directory exists when using --output on CLI (#1530)
+
+## v5.34.1
+
+ - bump the rollup devDependency to disable CVE warnings (Terser was not affected)
+
+## v5.34.0
+
+ - internal: stop assigning properties to objects they don't belong in
+ - internal: run compress tests in parallel
+ - `drop_console`: emit an empty function if the return value of `console.METHOD(...)` may be called.
+
+## v5.33.0
+
+ - `reduce_vars` improved when dealing with hoisted function definitions (#1544)
+
+## v5.32.0
+
+ - `import("module")` can now be input and output from ESTree AST (#1557)
+ - `BigInt` literals can now be input and output from ESTree AST (#1555)
+ - `typeof` an object or array (`typeof {}` and `typeof []`) can now be statically evaluated. (#1546)
+
+## v5.31.6
+ - Retain side effects in a `case` when the expression is a sequence (comma) expression
+
+## v5.31.5
+ - Revert v5.31.4, which created mysterious issues #1548, #1549
+
+## v5.31.4 (reverted)
+ - drop_unused: drop classes which only have side effects in the `extends` part
+
+## v5.31.3
+ - drop_unused: drop unused parameters from IIFEs in some more situations.
+
+## v5.31.2
+ - drop_unused: scan variables in self-referential class declarations that contain side effects.
+ - Don't add parens to arrow function when it's the default for an argument (#1540)
+ - Update domprops (#1538)
+
+## v5.31.1
+ - Allow drop-unused to drop the whole assignment (not just the assigned name) in more situations, in order to avoid duplication of long strings.
+
+## v5.31.0
+ - Sync up property mangler exceptions with current contents of Firefox and Chrome environments
+ - Add more webcomponent properties to property mangler exceptions (#1525)
+ - Drop non-nullish constants in `...spreads` in objects (#1141)
+
+## v5.30.4
+ - Fix parsing `#private in ...` when next to other operators
+
+## v5.30.3
+ - Fix precedence of `#private in ...` operator
+
+## v5.30.2
+ - Avoid optimizations inside computed keys, because they can cause js-engine-specific bugs.
+
+## v5.30.1
+ - Removed useless `\` escapes for non-ascii characters
+ - Make modern identifier characters quoted for older environments (#1512)
+
+## v5.30.0
+ - Improve removal of classes referring to themselves
+
+## v5.29.2
+ - Make sure 'computed_props' creates string keys
+ - Take into account the evaluated size when inlining
+
+## v5.29.1
+ - fix optimisation of all-bits mask check
+
+## v5.29.0
+ - Re-releases previously reverted 5.28.0
+ - Fix crash while optimizing some bitwise ops
+ - (internal) Remove needless wrapper for from_moz (#1499)
+
+## v5.28.1
+(hotfix release)
+ - Reverts v5.28.0
+
+## v5.28.0
+ - Optimise redundant or shrinkable bitwise operations (`|`, `^`, `&`, `>>`, `<<`)
+ - Evaluate some `BigInt` math operations
+
+## v5.27.2
+ - Recognise `this` as a reference to the surrounding class in `drop_unused`. Closes #1472
+
+## v5.27.1
+ - Fixed case where `collapse_vars` inlines `await` expressions into non-async functions.
+
+## v5.27.0
+ - Created `minify_sync()` alternative to `minify()` since there's no async code left.
+
+## v5.26.0
+ - Do not take the `/*#__PURE__*/` annotation into account when the `side_effects` compress option is off.
+ - The `preserve_annotations` option now automatically opts annotation comments in, instead of requiring the `comments` option to be configured for this.
+ - Refuse to parse empty parenthesized expressions (`()`)
+
+## v5.25.0
+ - Regex properties added to reserved property mangler (#1471)
+ - `pure_new` option added to drop unused `new` expressions.
+
+## v5.24.0
+ - Improve formatting performance in V8 by keeping a small work string and a large output string
+
+## v5.23.0
+ - When top_retain will keep a variable assignment around, inline the assignee when it's shorter than the name (#1434)
+ - Remove empty class `static {}` blocks.
+
+## v5.22.0
+ - Do not `unsafe`ly shorten expressions like a?.toString() when they're conditional.
+ - Avoid running drop_unused in nodes that aren't scopes. Fixes a rare crash.
+ - When 'module' is enabled, assume strict mode when figuring out scopes.
+
+## v5.21.0
+ - Do not inline functions that would be retained in the toplevel (as this would cause code duplication).
+ - Fix precedence of arrow function and ternary operator when formatting output.
+
+## v5.20.0
+ - Passing `minify()` zero files will now throw a clean exception (#1450)
+ - `drop_console` supports passing in an array of `console.*` method names (#1445)
+ - New DOM properties from the WebGPU API have been added for use in the property mangler (#1436)
+ - Internal code simplification (#1437)
+
+## v5.19.4
+ - Prevent creating very deeply nested ternaries from a long list of `if..return`
+ - Prevent inlining classes into other functions, to avoid constructors being compared.
+
+## v5.19.3
+ - Fix side effect detection of `optional?.chains`.
+ - Add roundRect to domprops.js (#1426)
+
+## v5.19.2
+ - fix performance hit from avoiding HTML comments in the output
+
+## v5.19.1
+ - Better avoid outputting `</script>` and HTML comments.
+ - Fix unused variables in class static blocks not being dropped correctly.
+ - Fix sourcemap names of methods that are `async` or `static`
+
+## v5.19.0
+ - Allow `/*@__MANGLE_PROP__*/` annotation in `object.property`, in addition to property declarations.
+
+## v5.18.2
+ - Stop using recursion in hoisted defuns fix.
+
+## v5.18.1
+ - Fix major performance issue caused by hoisted defuns' scopes bugfix.
+
+## v5.18.0
+ - Add new `/*@__MANGLE_PROP__*/` annotation, to mark properties that should be mangled.
+
+## v5.17.7
+ - Update some dependencies
+ - Add consistent sorting for `v` RegExp flag
+ - Add `inert` DOM attribute to domprops
+
+## v5.17.6
+ - Fixes to mozilla AST input and output, for class properties, private properties and static blocks
+ - Fix outputting a shorthand property in quotes when safari10 and ecma=2015 options are enabled
+ - `configurable` and `enumerable`, used in Object.defineProperty, added to domprops (#1393)
+
+## v5.17.5
+ - Take into account the non-deferred bits of a class, such as static properties, while dropping unused code.
+
+## v5.17.4
+
+ - Fix crash when trying to negate a class (`!class{}`)
+ - Avoid outputting comments between `yield`/`await` and its argument
+ - Fix detection of left-hand-side of assignment, to avoid optimizing it like any other expression in some edge cases
+
+## v5.17.3
+
+ - Fix issue with trimming a static class property's contents accessing the class as `this`.
+
+## v5.17.2
+ - Be less conservative when detecting use-before-definition of `var` in hoisted functions.
+ - Support unusual (but perfectly valid) initializers of for-in and for-of loops.
+ - Fix issue where hoisted function would be dropped if it was after a `continue` statement
+
+## v5.17.1
+ - Fix evaluating `.length` when the source array might've been mutated
+
+## v5.17.0
+ - Drop vestigial `= undefined` default argument in IIFE calls (#1366)
+ - Evaluate known arrays' `.length` property when statically determinable
+ - Add `@__KEY__` annotation to mangle string literals (#1365)
+
+## v5.16.9
+ - Fix parentheses in output of optional chains (`a?.b`) (#1374)
+ - More documentation on source maps (#1368)
+ - New `lhs_constants` option, allowing to stop Terser from swapping comparison operands (#1361)
+
+## v5.16.8
+
+ - Become even less conservative around function definitions for `reduce_vars`
+ - Fix parsing context of `import.meta` expressions such that method calls are allowed
+
+## v5.16.6
+
+ - Become less conservative with analyzing function definitions for `reduce_vars`
+ - Parse `import.meta` as a real AST node and not an `object.property`
+
+## v5.16.5
+
+ - Correctly handle AST transform functions that mutate children arrays
+ - Don't mutate the options object passed to Terser (#1342)
+ - Do not treat BigInt like a number
+
+## v5.16.4
+
+ - Keep `(defaultArg = undefined) => ...`, because default args don't count for function length
+ - Prevent inlining variables into `?.` optional chains
+ - Avoid removing unused arguments while transforming
+ - Optimize iterating AST node lists
+ - Make sure `catch` and `finally` aren't children of `try` in the AST
+ - Use modern unicode property escapes (`\p{...}`) to parse identifiers when available
+
+## v5.16.3
+
+ - Ensure function definitions, don't assume the values of variables defined after them.
+
+## v5.16.2
+
+ - Fix sourcemaps with non-ascii characters (#1318)
+ - Support string module name and export * as (#1336)
+ - Do not move `let` out of `for` initializers, as it can change scoping
+ - Fix a corner case that would generate the invalid syntax `if (something) let x` ("let" in braceless if body)
+ - Knowledge of more native object properties (#1330)
+ - Got rid of Travis (#1323)
+ - Added semi-secret `asObject` sourcemap option to typescript defs (#1321)
+
+## v5.16.1
+
+ - Properly handle references in destructurings (`const { [reference]: val } = ...`)
+ - Allow parsing of `.#privatefield` in nested classes
+ - Do not evaluate operations that return large strings if that would make the output code larger
+ - Make `collapse_vars` handle block scope correctly
+ - Internal improvements: Typos (#1311), more tests, small-scale refactoring
+
+## v5.16.0
+
+ - Disallow private fields in object bodies (#1011)
+ - Parse `#privatefield in object` (#1279)
+ - Compress `#privatefield in object`
+
+## v5.15.1
+
+ - Fixed missing parentheses around optional chains
+ - Avoid bare `let` or `const` as the bodies of `if` statements (#1253)
+ - Small internal fixes (#1271)
+ - Avoid inlining a class twice and creating two equivalent but `!==` classes.
+
+## v5.15.0
+ - Basic support for ES2022 class static initializer blocks.
+ - Add `AudioWorkletNode` constructor options to domprops list (#1230)
+ - Make identity function inliner not inline `id(...expandedArgs)`
+
+## v5.14.2
+
+ - Security fix for RegExps that should not be evaluated (regexp DDOS)
+ - Source maps improvements (#1211)
+ - Performance improvements in long property access evaluation (#1213)
+
+## v5.14.1
+ - keep_numbers option added to TypeScript defs (#1208)
+ - Fixed parsing of nested template strings (#1204)
+
+## v5.14.0
+ - Switched to @jridgewell/source-map for sourcemap generation (#1190, #1181)
+ - Fixed source maps with non-terminated segments (#1106)
+ - Enabled typescript types to be imported from the package (#1194)
+ - Extra DOM props have been added (#1191)
+ - Delete the AST while generating code, as a means to save RAM
+
+## v5.13.1
+ - Removed self-assignments (`varname=varname`) (closes #1081)
+ - Separated inlining code (for inlining things into references, or removing IIFEs)
+ - Allow multiple identifiers with the same name in `var` destructuring (eg `var { a, a } = x`) (#1176)
+
+## v5.13.0
+
+ - All calls to eval() were removed (#1171, #1184)
+ - `source-map` was updated to 0.8.0-beta.0 (#1164)
+ - NavigatorUAData was added to domprops to avoid property mangling (#1166)
+
+## v5.12.1
+
+ - Fixed an issue with function definitions inside blocks (#1155)
+ - Fixed parens of `new` in some situations (closes #1159)
+
+## v5.12.0
+
+ - `TERSER_DEBUG_DIR` environment variable
+ - @copyright comments are now preserved with the comments="some" option (#1153)
+
+## v5.11.0
+
+ - Unicode code point escapes (`\u{abcde}`) are not emitted inside RegExp literals anymore (#1147)
+ - acorn is now a regular dependency
+
+## v5.10.0
+
+ - Massive optimization to max_line_len (#1109)
+ - Basic support for import assertions
+ - Marked ES2022 Object.hasOwn as a pure function
+ - Fix `delete optional?.property`
+ - New CI/CD pipeline with github actions (#1057)
+ - Fix reordering of switch branches (#1092), (#1084)
+ - Fix error when creating a class property called `get`
+ - Acorn dependency is now an optional peerDependency
+ - Fix mangling collision with exported variables (#1072)
+ - Fix an issue with `return someVariable = (async () => { ... })()` (#1073)
+
+## v5.9.0
+
+ - Collapsing switch cases with the same bodies (even if they're not next to each other) (#1070).
+ - Fix evaluation of optional chain expressions (#1062)
+ - Fix mangling collision in ESM exports (#1063)
+ - Fix issue with mutating function objects after a second pass (#1047)
+ - Fix for inlining object spread `{ ...obj }` (#1071)
+ - Typescript typings fix (#1069)
+
+## v5.8.0
+
+ - Fixed shadowing variables while moving code in some cases (#1065)
+ - Stop mangling computed & quoted properties when keep_quoted is enabled.
+ - Fix for mangling private getter/setter and .#private access (#1060, #1068)
+ - Array.from has a new optimization when the unsafe option is set (#737)
+ - Mangle/propmangle let you generate your own identifiers through the nth_identifier option (#1061)
+ - More optimizations to switch statements (#1044)
+
+## v5.7.2
+
+ - Fixed issues with compressing functions defined in `global_defs` option (#1036)
+ - New recipe for using Terser in gulp was added to RECIPES.md (#1035)
+ - Fixed issues with `??` and `?.` (#1045)
+ - Future reserved words such as `package` no longer require you to disable strict mode to be used as names.
+ - Refactored huge compressor file into multiple more focused files.
+ - Avoided unparenthesized `in` operator in some for loops (it breaks parsing because of for..in loops)
+ - Improved documentation (#1021, #1025)
+ - More type definitions (#1021)
+
+## v5.7.1
+
+ - Avoided collapsing assignments together if it would place a chain assignment on the left hand side, which is invalid syntax (`a?.b = c`)
+ - Removed undefined from object expansions (`{ ...void 0 }` -> `{}`)
+ - Fix crash when checking if something is nullish or undefined (#1009)
+ - Fixed comparison of private class properties (#1015)
+ - Minor performance improvements (#993)
+ - Fixed scope of function defs in strict mode (they are block scoped)
+
+## v5.7.0
+
+ - Several compile-time evaluation and inlining fixes
+ - Allow `reduce_funcs` to be disabled again.
+ - Add `spidermonkey` options to parse and format (#974)
+ - Accept `{get = "default val"}` and `{set = "default val"}` in destructuring arguments.
+ - Change package.json export map to help require.resolve (#971)
+ - Improve docs
+ - Fix `export default` of an anonymous class with `extends`
+
+## v5.6.1
+
+ - Mark assignments to the `.prototype` of a class as pure
+ - Parenthesize `await` on the left of `**` (while accepting legacy non-parenthesised input)
+ - Avoided outputting NUL bytes in optimized RegExps, to stop the output from breaking other tools
+ - Added `exports` to domprops (#939)
+ - Fixed a crash when spreading `...this`
+ - Fixed the computed size of arrow functions, which improves their inlining
+
+## v5.6.0
+
+ - Added top-level await
+ - Beautify option has been removed in #895
+ - Private properties, getters and setters have been added in #913 and some more commits
+ - Docs improvements: #896, #903, #916
+
+## v5.5.1
+
+ - Fixed object properties with unicode surrogates on safari.
+
+## v5.5.0
+
+ - Fixed crash when inlining uninitialized variable into template string.
+ - The sourcemap for dist was removed for being too large.
+
+## v5.4.0
+
+ - Logical assignment
+ - Change `let x = undefined` to just `let x`
+ - Removed some optimizations for template strings, placing them behind `unsafe` options. Reason: adding strings is not equivalent to template strings, due to valueOf differences.
+ - The AST_Token class was slimmed down in order to use less memory.
+
+## v5.3.8
+
+ - Restore node 13 support
+
+## v5.3.7
+
+Hotfix release, fixes package.json "engines" syntax
+
+## v5.3.6
+
+ - Fixed parentheses when outputting `??` mixed with `||` and `&&`
+ - Improved hygiene of the symbol generator
+
+## v5.3.5
+
+ - Avoid moving named functions into default exports.
+ - Enabled transform() for chain expressions. This allows AST transformers to reach inside chain expressions.
+
+## v5.3.4
+
+ - Fixed a crash when hoisting (with `hoist_vars`) a destructuring variable declaration
+
+## v5.3.3
+
+ - `source-map` library has been updated, bringing memory usage and CPU time improvements when reading input source maps (the SourceMapConsumer is now WASM based).
+ - The `wrap_func_args` option now also wraps arrow functions, as opposed to only function expressions.
+
+## v5.3.2
+
+ - Prevented spread operations from being expanded when the expanded array/object contains getters, setters, or array holes.
+ - Fixed _very_ slow self-recursion in some cases of removing extraneous parentheses from `+` operations.
+
+## v5.3.1
+
+ - An issue with destructuring declarations when `pure_getters` is enabled has been fixed
+ - Fixed a crash when chain expressions need to be shallowly compared
+ - Made inlining functions more conservative to make sure a function that contains a reference to itself isn't moved into a place that can create multiple instances of itself.
+
+## v5.3.0
+
+ - Fixed a crash when compressing object spreads in some cases
+ - Fixed compiletime evaluation of optional chains (caused typeof a?.b to always return "object")
+ - domprops has been updated to contain every single possible prop
+
+## v5.2.1
+
+ - The parse step now doesn't accept an `ecma` option, so that all ES code is accepted.
+ - Optional dotted chains now accept keywords, just like dotted expressions (`foo?.default`)
+
+## v5.2.0
+
+ - Optional chaining syntax is now supported.
+ - Consecutive await expressions don't have unnecessary parens
+ - Taking the variable name's length (after mangling) into consideration when deciding to inline
+
+## v5.1.0
+
+ - `import.meta` is now supported
+ - Typescript typings have been improved
+
+## v5.0.0
+
+ - `in` operator now taken into account during property mangle.
+ - Fixed infinite loop in face of a reference loop in some situations.
+ - Kept exports and imports around even if there's something which will throw before them.
+ - The main exported bundle for commonjs, dist/bundle.min.js is no longer minified.
+
+## v5.0.0-beta.0
+
+ - BREAKING: `minify()` is now async and rejects a promise instead of returning an error.
+ - BREAKING: Internal AST is no longer exposed, so that it can be improved without releasing breaking changes.
+ - BREAKING: Lowest supported node version is 10
+ - BREAKING: There are no more warnings being emitted
+ - Module is now distributed as a dual package - You can `import` and `require()` too.
+ - Inline improvements were made
+
+
+-----
+
+## v4.8.1 (backport)
+
+ - Security fix for RegExps that should not be evaluated (regexp DDOS)
+
+## v4.8.0
+
+ - Support for numeric separators (`million = 1_000_000`) was added.
+ - Assigning properties to a class is now assumed to be pure.
+ - Fixed bug where `yield` wasn't considered a valid property key in generators.
+
+## v4.7.0
+
+ - A bug was fixed where an arrow function would have the wrong size
+ - `arguments` object is now considered safe to retrieve properties from (useful for `length`, or `0`) even when `pure_getters` is not set.
+ - Fixed erroneous `const` declarations without value (which is invalid) in some corner cases when using `collapse_vars`.
+
+## v4.6.13
+
+ - Fixed issue where ES5 object properties were being turned into ES6 object properties due to more lax unicode rules.
+ - Fixed parsing of BigInt with lowercase `e` in them.
+
+## v4.6.12
+
+ - Fixed subtree comparison code, making it see that `[1,[2, 3]]` is different from `[1, 2, [3]]`
+ - Printing of unicode identifiers has been improved
+
+## v4.6.11
+
+ - Read unused classes' properties and method keys, to figure out if they use other variables.
+ - Prevent inlining into block scopes when there are name collisions
+ - Functions are no longer inlined into parameter defaults, because they live in their own special scope.
+ - When inlining identity functions, take into account the fact they may be used to drop `this` in function calls.
+ - Nullish coalescing operator (`x ?? y`), plus basic optimization for it.
+ - Template literals in binary expressions such as `+` have been further optimized
+
+## v4.6.10
+
+ - Do not use reduce_vars when classes are present
+
+## v4.6.9
+
+ - Check if block scopes actually exist in blocks
+
+## v4.6.8
+
+ - Take into account "executed bits" of classes like static properties or computed keys, when checking if a class evaluation might throw or have side effects.
+
+## v4.6.7
+
+ - Some new performance gains through a `AST_Node.size()` method which measures a node's source code length without printing it to a string first.
+ - An issue with setting `--comments` to `false` in the CLI has been fixed.
+ - Fixed some issues with inlining
+ - `unsafe_symbols` compress option was added, which turns `Symbol("name")` into just `Symbol()`
+ - Brought back compress performance improvement through the `AST_Node.equivalent_to(other)` method (which was reverted in v4.6.6).
+
+## v4.6.6
+
+(hotfix release)
+
+ - Reverted code to 4.6.4 to allow for more time to investigate an issue.
+
+## v4.6.5 (REVERTED)
+
+ - Improved compress performance through using a new method to see if two nodes are equivalent, instead of printing them to a string.
+
+## v4.6.4
+
+ - The `"some"` value in the `comments` output option now preserves `@lic` and other important comments when using `//`
+ - `</script>` is now better escaped in regex, and in comments, when using the `inline_script` output option
+ - Fixed an issue when transforming `new RegExp` into `/.../` when slashes are included in the source
+ - `AST_Node.prototype.constructor` now exists, allowing for easier debugging of crashes
+ - Multiple if statements with the same consequents are now collapsed
+ - Typescript typings improvements
+ - Optimizations while looking for surrogate pairs in strings
+
+## v4.6.3
+
+ - Annotations such as `/*#__NOINLINE__*/` and `/*#__PURE__*/` may now be preserved using the `preserve_annotations` output option
+ - A TypeScript definition update for the `keep_quoted` output option.
+
+## v4.6.2
+
+ - A bug where functions were inlined into other functions with scope conflicts has been fixed.
+ - `/*#__NOINLINE__*/` annotation fixed for more use cases where inlining happens.
+
+## v4.6.1
+
+ - Fixed an issue where a class is duplicated by reduce_vars when there's a recursive reference to the class.
+
+## v4.6.0
+
+ - Fixed issues with recursive class references.
+ - BigInt evaluation has been prevented, stopping Terser from evaluating BigInts like it would do regular numbers.
+ - Class property support has been added
+
+## v4.5.1
+
+(hotfix release)
+
+ - Fixed issue where `() => ({})[something]` was not parenthesised correctly.
+
+## v4.5.0
+
+ - Inlining has been improved
+ - An issue where keep_fnames combined with functions declared through variables was causing name shadowing has been fixed
+ - You can now set the ES version through their year
+ - The output option `keep_numbers` has been added, which prevents Terser from turning `1000` into `1e3` and such
+ - Internal small optimisations and refactors
+
+## v4.4.3
+
+ - Number and BigInt parsing has been fixed
+ - `/*#__INLINE__*/` annotation fixed for arrow functions with non-block bodies.
+ - Functional tests have been added, using [this repository](https://github.com/terser/terser-functional-tests).
+ - A memory leak, where the entire AST lives on after compression, has been plugged.
+
+## v4.4.2
+
+ - Fixed a problem with inlining identity functions
+
+## v4.4.1
+
+*note:* This introduced a feature, therefore it should have been a minor release.
+
+ - Fixed a crash when `unsafe` was enabled.
+ - An issue has been fixed where `let` statements might be collapsed out of their scope.
+ - Some error messages have been improved by adding quotes around variable names.
+
+## v4.4.0
+
+ - Added `/*#__INLINE__*/` and `/*#__NOINLINE__*/` annotations for calls. If a call has one of these, it either forces or forbids inlining.
+
+## v4.3.11
+
+ - Fixed a problem where `window` was considered safe to access, even though there are situations where it isn't (Node.js, workers...)
+ - Fixed an error where `++` and `--` were considered side-effect free
+ - `Number(x)` now needs both `unsafe` and and `unsafe_math` to be compressed into `+x` because `x` might be a `BigInt`
+ - `keep_fnames` now correctly supports regexes when the function is in a variable declaration
+
+## v4.3.10
+
+ - Fixed syntax error when repeated semicolons were encountered in classes
+ - Fixed invalid output caused by the creation of empty sequences internally
+ - Scopes are now updated when scopes are inlined into them
+
+## v4.3.9
+ - Fixed issue with mangle's `keep_fnames` option, introduced when adding code to keep variable names of anonymous functions
+
+## v4.3.8
+
+ - Typescript typings fix
+
+## v4.3.7
+
+ - Parsing of regex options in the CLI (which broke in v4.3.5) was fixed.
+ - typescript definition updates
+
+## v4.3.6
+
+(crash hotfix)
+
+## v4.3.5
+
+ - Fixed an issue with DOS line endings strings separated by `\` and a new line.
+ - Improved fix for the output size regression related to unused references within the extends section of a class.
+ - Variable names of anonymous functions (eg: `const x = () => { ... }` or `var func = function () {...}`) are now preserved when keep_fnames is true.
+ - Fixed performance degradation introduced for large payloads in v4.2.0
+
+## v4.3.4
+
+ - Fixed a regression where the output size was increased when unused classes were referred to in the extends clause of a class.
+ - Small typescript typings fixes.
+ - Comments with `@preserve`, `@license`, `@cc_on` as well as comments starting with `/*!` and `/**!` are now preserved by default.
+
+## v4.3.3
+
+ - Fixed a problem where parsing template strings would mix up octal notation and a slash followed by a zero representing a null character.
+ - Started accepting the name `async` in destructuring arguments with default value.
+ - Now Terser takes into account side effects inside class `extends` clauses.
+ - Added parens whenever there's a comment between a return statement and the returned value, to prevent issues with ASI.
+ - Stopped using raw RegExp objects, since the spec is going to continue to evolve. This ensures Terser is able to process new, unknown RegExp flags and features. This is a breaking change in the AST node AST_RegExp.
+
+## v4.3.2
+
+ - Typescript typing fix
+ - Ensure that functions can't be inlined, by reduce_vars, into places where they're accessing variables with the same name, but from somewhere else.
+
+## v4.3.1
+
+ - Fixed an issue from 4.3.0 where any block scope within a for loop erroneously had its parent set to the function scopee
+ - Fixed an issue where compressing IIFEs with argument expansions would result in some parameters becoming undefined
+ - addEventListener options argument's properties are now part of the DOM properties list.
+
+## v4.3.0
+
+ - Do not drop computed object keys with side effects
+ - Functions passed to other functions in calls are now wrapped in parentheses by default, which speeds up loading most modules
+ - Objects with computed properties are now less likely to be hoisted
+ - Speed and memory efficiency optimizations
+ - Fixed scoping issues with `try` and `switch`
+
+## v4.2.1
+
+ - Minor refactors
+ - Fixed a bug similar to #369 in collapse_vars
+ - Functions can no longer be inlined into a place where they're going to be compared with themselves.
+ - reduce_funcs option is now legacy, as using reduce_vars without reduce_funcs caused some weird corner cases. As a result, it is now implied in reduce_vars and can't be turned off without turning off reduce_vars.
+ - Bug which would cause a random stack overflow has now been fixed.
+
+## v4.2.0
+
+ - When the source map URL is `inline`, don't write it to a file.
+ - Fixed output parens when a lambda literal is the tag on a tagged template string.
+ - The `mangle.properties.undeclared` option was added. This enables the property mangler to mangle properties of variables which can be found in the name cache, but whose properties are not known to this Terser run.
+ - The v8 bug where the toString and source representations of regexes like `RegExp("\\\n")` includes an actual newline is now fixed.
+ - Now we're guaranteed to not have duplicate comments in the output
+ - Domprops updates
+
+## v4.1.4
+
+ - Fixed a crash when inlining a function into somewhere else when it has interdependent, non-removable variables.
+
+## v4.1.3
+
+ - Several issues with the `reduce_vars` option were fixed.
+ - Starting this version, we only have a dist/bundle.min.js
+
+## v4.1.2
+
+ - The hotfix was hotfixed
+
+## v4.1.1
+
+ - Fixed a bug where toplevel scopes were being mixed up with lambda scopes
+
+## v4.1.0
+
+ - Internal functions were replaced by `Object.assign`, `Array.prototype.some`, `Array.prototype.find` and `Array.prototype.every`.
+ - A serious issue where some ESM-native code was broken was fixed.
+ - Performance improvements were made.
+ - Support for BigInt was added.
+ - Inline efficiency was improved. Functions are now being inlined more proactively instead of being inlined only after another Compressor pass.
+
+## v4.0.2
+
+(Hotfix release. Reverts unmapped segments PR [#342](https://github.com/terser/terser/pull/342), which will be put back on Terser when the upstream issue is resolved)
+
+## v4.0.1
+
+ - Collisions between the arguments of inlined functions and names in the outer scope are now being avoided while inlining
+ - Unmapped segments are now preserved when compressing a file which has source maps
+ - Default values of functions are now correctly converted from Mozilla AST to Terser AST
+ - JSON ⊂ ECMAScript spec (if you don't know what this is you don't need to)
+ - Export AST_* classes to library users
+ - Fixed issue with `collapse_vars` when functions are created with the same name as a variable which already exists
+ - Added `MutationObserverInit` (Object with options for initialising a mutation observer) properties to the DOM property list
+ - Custom `Error` subclasses are now internally used instead of old-school Error inheritance hacks.
+ - Documentation fixes
+ - Performance optimizations
+
+## v4.0.0
+
+ - **breaking change**: The `variables` property of all scopes has become a standard JavaScript `Map` as opposed to the old bespoke `Dictionary` object.
+ - Typescript definitions were fixed
+ - `terser --help` was fixed
+ - The public interface was cleaned up
+ - Fixed optimisation of `Array` and `new Array`
+ - Added the `keep_quoted=strict` mode to mangle_props, which behaves more like Google Closure Compiler by mangling all unquoted property names, instead of reserving quoted property names automatically.
+ - Fixed parent functions' parameters being shadowed in some cases
+ - Allowed Terser to run in a situation where there are custom functions attached to Object.prototype
+ - And more bug fixes, optimisations and internal changes
+
+## v3.17.0
+
+ - More DOM properties added to --mangle-properties's DOM property list
+ - Closed issue where if 2 functions had the same argument name, Terser would not inline them together properly
+ - Fixed issue with `hasOwnProperty.call`
+ - You can now list files to minify in a Terser config file
+ - Started replacing `new Array(<number>)` with an array literal
+ - Started using ES6 capabilities like `Set` and the `includes` method for strings and arrays
+
+## v3.16.1
+
+ - Fixed issue where Terser being imported with `import` would cause it not to work due to the `__esModule` property. (PR #254 was submitted, which was nice, but since it wasn't a pure commonJS approach I decided to go with my own solution)
+
+## v3.16.0
+
+ - No longer leaves names like Array or Object or window as a SimpleStatement (statement which is just a single expression).
+ - Add support for sections sourcemaps (IndexedSourceMapConsumer)
+ - Drops node.js v4 and starts using commonJS
+ - Is now built with rollup
+
+## v3.15.0
+
+ - Inlined spread syntax (`[...[1, 2, 3], 4, 5] => [1, 2, 3, 4, 5]`) in arrays and objects.
+ - Fixed typo in compressor warning
+ - Fixed inline source map input bug
+ - Fixed parsing of template literals with unnecessary escapes (Like `\\a`)
Index: frontend/node_modules/terser/LICENSE
===================================================================
--- frontend/node_modules/terser/LICENSE	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/LICENSE	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,27 @@
+Copyright 2012-2018 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+    * Redistributions of source code must retain the above
+      copyright notice, this list of conditions and the following
+      disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials
+      provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
Index: frontend/node_modules/terser/PATRONS.md
===================================================================
--- frontend/node_modules/terser/PATRONS.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/PATRONS.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,15 @@
+# Our patrons
+
+These are the first-tier patrons from Patreon (notice: **The Terser Patreon is shutting down in favor of opencollective**). My appreciation goes to everyone on this list for supporting the project!
+
+ * 38elements
+ * Alan Orozco
+ * Aria Buckles
+ * CKEditor
+ * Mariusz Nowak
+ * Nakshatra Mukhopadhyay
+ * Philippe Léger
+ * Piotrek Koszuliński
+ * Serhiy Shyyko
+ * Viktor Hubert
+ * 龙腾道
Index: frontend/node_modules/terser/README.md
===================================================================
--- frontend/node_modules/terser/README.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/README.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,1423 @@
+<h1><img src="https://terser.org/img/terser-banner-logo.png" alt="Terser" width="400"></h1>
+
+  [![NPM Version][npm-image]][npm-url]
+  [![NPM Downloads][downloads-image]][downloads-url]
+  [![CI pipeline][ci-image]][ci-url]
+  [![Opencollective financial contributors][opencollective-contributors]][opencollective-url]
+
+A JavaScript mangler/compressor toolkit for ES6+.
+
+*note*: <s>You can support this project on patreon: [link]</s> **The Terser Patreon is shutting down in favor of opencollective**. Check out [PATRONS.md](https://github.com/terser/terser/blob/master/PATRONS.md) for our first-tier patrons.
+
+Terser recommends you use RollupJS to bundle your modules, as that produces smaller code overall.
+
+*Beautification* has been undocumented and is *being removed* from terser, we recommend you use [prettier](https://npmjs.com/package/prettier).
+
+Find the changelog in [CHANGELOG.md](https://github.com/terser/terser/blob/master/CHANGELOG.md)
+
+
+
+[npm-image]: https://img.shields.io/npm/v/terser.svg
+[npm-url]: https://npmjs.org/package/terser
+[downloads-image]: https://img.shields.io/npm/dm/terser.svg
+[downloads-url]: https://npmjs.org/package/terser
+[ci-image]: https://github.com/terser/terser/actions/workflows/ci.yml/badge.svg
+[ci-url]: https://github.com/terser/terser/actions/workflows/ci.yml
+[opencollective-contributors]: https://opencollective.com/terser/tiers/badge.svg
+[opencollective-url]: https://opencollective.com/terser
+
+Why choose terser?
+------------------
+
+`uglify-es` is [no longer maintained](https://github.com/mishoo/UglifyJS2/issues/3156#issuecomment-392943058) and `uglify-js` does not support ES6+.
+
+**`terser`** is a fork of `uglify-es` that mostly retains API and CLI compatibility
+with `uglify-es` and `uglify-js@3`.
+
+Install
+-------
+
+First make sure you have installed the latest version of [node.js](http://nodejs.org/)
+(You may need to restart your computer after this step).
+
+From NPM for use as a command line app:
+
+    npm install terser -g
+
+From NPM for programmatic use:
+
+    npm install terser
+
+# Command line usage
+
+<!-- CLI_USAGE:START -->
+
+```
+terser [input files] [options]
+```
+
+Terser can take multiple input files.  It's recommended that you pass the
+input files first, then pass the options.  Terser will parse input files
+in sequence and apply any compression options.  The files are parsed in the
+same global scope, that is, a reference from a file to some
+variable/function declared in another file will be matched properly.
+
+Command line arguments that take options (like --parse, --compress, --mangle and
+--format) can take in a comma-separated list of default option overrides. For
+instance:
+
+    terser input.js --compress ecma=2015,computed_props=false
+
+If no input file is specified, Terser will read from STDIN.
+
+If you wish to pass your options before the input files, separate the two with
+a double dash to prevent input files being used as option arguments:
+
+    terser --compress --mangle -- input.js
+
+### Command line options
+
+```
+    -h, --help                  Print usage information.
+                                `--help options` for details on available options.
+    -V, --version               Print version number.
+    -p, --parse <options>       Specify parser options:
+                                `acorn`  Use Acorn for parsing.
+                                `bare_returns`  Allow return outside of functions.
+                                                Useful when minifying CommonJS
+                                                modules and Userscripts that may
+                                                be anonymous function wrapped (IIFE)
+                                                by the .user.js engine `caller`.
+                                `expression`  Parse a single expression, rather than
+                                              a program (for parsing JSON).
+                                `spidermonkey`  Assume input files are SpiderMonkey
+                                                AST format (as JSON).
+    -c, --compress [options]    Enable compressor/specify compressor options:
+                                `pure_funcs`  List of functions that can be safely
+                                              removed when their return values are
+                                              not used.
+    -m, --mangle [options]      Mangle names/specify mangler options:
+                                `reserved`  List of names that should not be mangled.
+    --mangle-props [options]    Mangle properties/specify mangler options:
+                                `builtins`  Mangle property names that overlaps
+                                            with standard JavaScript globals and DOM
+                                            API props.
+                                `debug`  Add debug prefix and suffix.
+                                `keep_quoted`  Only mangle unquoted properties, quoted
+                                               properties are automatically reserved.
+                                               `strict` disables quoted properties
+                                               being automatically reserved.
+                                `regex`  Only mangle matched property names.
+                                `only_annotated` Only mangle properties defined with /*@__MANGLE_PROP__*/.
+                                `reserved`  List of names that should not be mangled.
+    -f, --format [options]      Specify format options.
+                                `preamble`  Preamble to prepend to the output. You
+                                            can use this to insert a comment, for
+                                            example for licensing information.
+                                            This will not be parsed, but the source
+                                            map will adjust for its presence.
+                                `quote_style`  Quote style:
+                                               0 - auto
+                                               1 - single
+                                               2 - double
+                                               3 - original
+                                `wrap_iife`  Wrap IIFEs in parenthesis. Note: you may
+                                             want to disable `negate_iife` under
+                                             compressor options.
+                                `wrap_func_args`  Wrap function arguments in parenthesis.
+    -o, --output <file>         Output file path (default STDOUT). Specify `ast` or
+                                `spidermonkey` to write Terser or SpiderMonkey AST
+                                as JSON to STDOUT respectively.
+    --comments [filter]         Preserve copyright comments in the output. By
+                                default this works like Google Closure, keeping
+                                JSDoc-style comments that contain e.g. "@license",
+                                or start with "!". You can optionally pass one of the
+                                following arguments to this flag:
+                                - "all" to keep all comments
+                                - `false` to omit comments in the output
+                                - a valid JS RegExp like `/foo/` or `/^!/` to
+                                keep only matching comments.
+                                Note that currently not *all* comments can be
+                                kept when compression is on, because of dead
+                                code removal or cascading statements into
+                                sequences.
+    --config-file <file>        Read `minify()` options from JSON file.
+    -d, --define <expr>[=value] Global definitions.
+    --ecma <version>            Specify ECMAScript release: 5, 2015, 2016, etc.
+    -e, --enclose [arg[:value]] Embed output in a big function with configurable
+                                arguments and values.
+    --ie8                       Support non-standard Internet Explorer 8.
+                                Equivalent to setting `ie8: true` in `minify()`
+                                for `compress`, `mangle` and `format` options.
+                                By default Terser will not try to be IE-proof.
+    --keep-classnames           Do not mangle/drop class names.
+    --keep-fnames               Do not mangle/drop function names.  Useful for
+                                code relying on Function.prototype.name.
+    --module                    Input is an ES6 module. If `compress` or `mangle` is
+                                enabled then the `toplevel` option, as well as strict mode,
+                                will be enabled.
+    --name-cache <file>         File to hold mangled name mappings.
+    --safari10                  Support non-standard Safari 10/11.
+                                Equivalent to setting `safari10: true` in `minify()`
+                                for `mangle` and `format` options.
+                                By default `terser` will not work around
+                                Safari 10/11 bugs.
+    --source-map [options]      Enable source map/specify source map options:
+                                `base`  Path to compute relative paths from input files.
+                                `content`  Input source map, useful if you're compressing
+                                           JS that was generated from some other original
+                                           code. Specify "inline" if the source map is
+                                           included within the sources.
+                                `filename`  Name and/or location of the output source.
+                                `includeSources`  Pass this flag if you want to include
+                                                  the content of source files in the
+                                                  source map as sourcesContent property.
+                                `root`  Path to the original source to be included in
+                                        the source map.
+                                `url`  If specified, path to the source map to append in
+                                       `//# sourceMappingURL`.
+    --timings                   Display operations run time on STDERR.
+    --toplevel                  Compress and/or mangle variables in top level scope.
+    --wrap <name>               Embed everything in a big function, making the
+                                “exports” and “global” variables available. You
+                                need to pass an argument to this option to
+                                specify the name that your module will take
+                                when included in, say, a browser.
+```
+
+Specify `--output` (`-o`) to declare the output file.  Otherwise the output
+goes to STDOUT.
+
+## CLI source map options
+
+Terser can generate a source map file, which is highly useful for
+debugging your compressed JavaScript.  To get a source map, pass
+`--source-map --output output.js` (source map will be written out to
+`output.js.map`).
+
+Additional options:
+
+- `--source-map "filename='<NAME>'"` to specify the name of the source map.
+
+- `--source-map "root='<URL>'"` to pass the URL where the original files can be found.
+
+- `--source-map "url='<URL>'"` to specify the URL where the source map can be found.
+  Otherwise Terser assumes HTTP `X-SourceMap` is being used and will omit the
+  `//# sourceMappingURL=` directive.
+
+For example:
+
+    terser js/file1.js js/file2.js \
+             -o foo.min.js -c -m \
+             --source-map "root='http://foo.com/src',url='foo.min.js.map'"
+
+The above will compress and mangle `file1.js` and `file2.js`, will drop the
+output in `foo.min.js` and the source map in `foo.min.js.map`.  The source
+mapping will refer to `http://foo.com/src/js/file1.js` and
+`http://foo.com/src/js/file2.js` (in fact it will list `http://foo.com/src`
+as the source map root, and the original files as `js/file1.js` and
+`js/file2.js`).
+
+### Composed source map
+
+When you're compressing JS code that was output by a compiler such as
+CoffeeScript, mapping to the JS code won't be too helpful.  Instead, you'd
+like to map back to the original code (i.e. CoffeeScript).  Terser has an
+option to take an input source map.  Assuming you have a mapping from
+CoffeeScript → compiled JS, Terser can generate a map from CoffeeScript →
+compressed JS by mapping every token in the compiled JS to its original
+location.
+
+To use this feature pass `--source-map "content='/path/to/input/source.map'"`
+or `--source-map "content=inline"` if the source map is included inline with
+the sources.
+
+## CLI compress options
+
+You need to pass `--compress` (`-c`) to enable the compressor.  Optionally
+you can pass a comma-separated list of [compress options](#compress-options).
+
+Options are in the form `foo=bar`, or just `foo` (the latter implies
+a boolean option that you want to set `true`; it's effectively a
+shortcut for `foo=true`).
+
+Example:
+
+    terser file.js -c toplevel,sequences=false
+
+## CLI mangle options
+
+To enable the mangler you need to pass `--mangle` (`-m`).  The following
+(comma-separated) options are supported:
+
+- `toplevel` (default `false`) -- mangle names declared in the top level scope.
+
+- `eval` (default `false`) -- mangle names visible in scopes where `eval` or `with` are used.
+
+When mangling is enabled but you want to prevent certain names from being
+mangled, you can declare those names with `--mangle reserved` — pass a
+comma-separated list of names.  For example:
+
+    terser ... -m reserved=['$','require','exports']
+
+to prevent the `require`, `exports` and `$` names from being changed.
+
+### CLI mangling property names (`--mangle-props`)
+
+**Note:** THIS **WILL** BREAK YOUR CODE. A good rule of thumb is not to use this unless you know exactly what you're doing and how this works and read this section until the end.
+
+Mangling property names is a separate step, different from variable name mangling.  Pass
+`--mangle-props` to enable it. The least dangerous
+way to use this is to use the `regex` option like so:
+
+```
+terser example.js -c -m --mangle-props regex=/_$/
+```
+
+This will mangle all properties that end with an
+underscore. So you can use it to mangle internal methods.
+
+By default, it will mangle all properties in the
+input code with the exception of built in DOM properties and properties
+in core JavaScript classes, which is what will break your code if you don't:
+
+1. Control all the code you're mangling
+2. Avoid using a module bundler, as they usually will call Terser on each file individually, making it impossible to pass mangled objects between modules.
+3. Avoid calling functions like `defineProperty` or `hasOwnProperty`, because they refer to object properties using strings and will break your code if you don't know what you are doing.
+
+An example:
+
+```javascript
+// example.js
+var x = {
+    baz_: 0,
+    foo_: 1,
+    calc: function() {
+        return this.foo_ + this.baz_;
+    }
+};
+x.bar_ = 2;
+x["baz_"] = 3;
+console.log(x.calc());
+```
+Mangle all properties (except for JavaScript `builtins`) (**very** unsafe):
+```bash
+$ terser example.js -c passes=2 -m --mangle-props
+```
+```javascript
+var x={o:3,t:1,i:function(){return this.t+this.o},s:2};console.log(x.i());
+```
+Mangle all properties except for `reserved` properties (still very unsafe):
+```bash
+$ terser example.js -c passes=2 -m --mangle-props reserved=[foo_,bar_]
+```
+```javascript
+var x={o:3,foo_:1,t:function(){return this.foo_+this.o},bar_:2};console.log(x.t());
+```
+Mangle all properties matching a `regex` (not as unsafe but still unsafe):
+```bash
+$ terser example.js -c passes=2 -m --mangle-props regex=/_$/
+```
+```javascript
+var x={o:3,t:1,calc:function(){return this.t+this.o},i:2};console.log(x.calc());
+```
+
+Combining mangle properties options:
+```bash
+$ terser example.js -c passes=2 -m --mangle-props regex=/_$/,reserved=[bar_]
+```
+```javascript
+var x={o:3,t:1,calc:function(){return this.t+this.o},bar_:2};console.log(x.calc());
+```
+
+In order for this to be of any use, we avoid mangling standard JS names and DOM
+API properties by default (`--mangle-props builtins` to override).
+
+A regular expression can be used to define which property names should be
+mangled.  For example, `--mangle-props regex=/^_/` will only mangle property
+names that start with an underscore.
+
+When you compress multiple files using this option, in order for them to
+work together in the end we need to ensure somehow that one property gets
+mangled to the same name in all of them.  For this, pass `--name-cache filename.json`
+and Terser will maintain these mappings in a file which can then be reused.
+It should be initially empty.  Example:
+
+```bash
+$ rm -f /tmp/cache.json  # start fresh
+$ terser file1.js file2.js --mangle-props --name-cache /tmp/cache.json -o part1.js
+$ terser file3.js file4.js --mangle-props --name-cache /tmp/cache.json -o part2.js
+```
+
+Now, `part1.js` and `part2.js` will be consistent with each other in terms
+of mangled property names.
+
+Using the name cache is not necessary if you compress all your files in a
+single call to Terser.
+
+### Mangling unquoted names (`--mangle-props keep_quoted`)
+
+Using quoted property name (`o["foo"]`) reserves the property name (`foo`)
+so that it is not mangled throughout the entire script even when used in an
+unquoted style (`o.foo`). Example:
+
+```javascript
+// stuff.js
+var o = {
+    "foo": 1,
+    bar: 3
+};
+o.foo += o.bar;
+console.log(o.foo);
+```
+```bash
+$ terser stuff.js --mangle-props keep_quoted -c -m
+```
+```javascript
+var o={foo:1,o:3};o.foo+=o.o,console.log(o.foo);
+```
+
+### Debugging property name mangling
+
+You can also pass `--mangle-props debug` in order to mangle property names
+without completely obscuring them. For example the property `o.foo`
+would mangle to `o._$foo$_` with this option. This allows property mangling
+of a large codebase while still being able to debug the code and identify
+where mangling is breaking things.
+
+```bash
+$ terser stuff.js --mangle-props debug -c -m
+```
+```javascript
+var o={_$foo$_:1,_$bar$_:3};o._$foo$_+=o._$bar$_,console.log(o._$foo$_);
+```
+
+You can also pass a custom suffix using `--mangle-props debug=XYZ`. This would then
+mangle `o.foo` to `o._$foo$XYZ_`. You can change this each time you compile a
+script to identify how a property got mangled. One technique is to pass a
+random number on every compile to simulate mangling changing with different
+inputs (e.g. as you update the input script with new properties), and to help
+identify mistakes like writing mangled keys to storage.
+
+<!-- CLI_USAGE:END -->
+
+# API Reference
+
+<!-- API_REFERENCE:START -->
+
+Assuming installation via NPM, you can load Terser in your application
+like this:
+
+```javascript
+const { minify } = require("terser");
+```
+
+Or,
+
+```javascript
+import { minify } from "terser";
+```
+
+Browser loading is also supported. It exposes a global variable `Terser` containing a `.minify` property:
+```html
+<script src="https://cdn.jsdelivr.net/npm/source-map@0.7.3/dist/source-map.js"></script>
+<script src="https://cdn.jsdelivr.net/npm/terser/dist/bundle.min.js"></script>
+```
+
+There is an async high level function, **`async minify(code, options)`**,
+which will perform all minification [phases](#minify-options) in a configurable
+manner. By default `minify()` will enable [`compress`](#compress-options)
+and [`mangle`](#mangle-options). Example:
+```javascript
+var code = "function add(first, second) { return first + second; }";
+var result = await minify(code, { sourceMap: true });
+console.log(result.code);  // minified output: function add(n,d){return n+d}
+console.log(result.map);  // source map
+```
+
+There is also a `minify_sync()` alternative version of it, which returns instantly.
+
+You can `minify` more than one JavaScript file at a time by using an object
+for the first argument where the keys are file names and the values are source
+code:
+```javascript
+var code = {
+    "file1.js": "function add(first, second) { return first + second; }",
+    "file2.js": "console.log(add(1 + 2, 3 + 4));"
+};
+var result = await minify(code);
+console.log(result.code);
+// function add(d,n){return d+n}console.log(add(3,7));
+```
+
+The `toplevel` option:
+```javascript
+var code = {
+    "file1.js": "function add(first, second) { return first + second; }",
+    "file2.js": "console.log(add(1 + 2, 3 + 4));"
+};
+var options = { toplevel: true };
+var result = await minify(code, options);
+console.log(result.code);
+// console.log(3+7);
+```
+
+The `nameCache` option:
+```javascript
+var options = {
+    mangle: {
+        toplevel: true,
+    },
+    nameCache: {}
+};
+var result1 = await minify({
+    "file1.js": "function add(first, second) { return first + second; }"
+}, options);
+var result2 = await minify({
+    "file2.js": "console.log(add(1 + 2, 3 + 4));"
+}, options);
+console.log(result1.code);
+// function n(n,r){return n+r}
+console.log(result2.code);
+// console.log(n(3,7));
+```
+
+You may persist the name cache to the file system in the following way:
+```javascript
+var cacheFileName = "/tmp/cache.json";
+var options = {
+    mangle: {
+        properties: true,
+    },
+    nameCache: JSON.parse(fs.readFileSync(cacheFileName, "utf8"))
+};
+fs.writeFileSync("part1.js", await minify({
+    "file1.js": fs.readFileSync("file1.js", "utf8"),
+    "file2.js": fs.readFileSync("file2.js", "utf8")
+}, options).code, "utf8");
+fs.writeFileSync("part2.js", await minify({
+    "file3.js": fs.readFileSync("file3.js", "utf8"),
+    "file4.js": fs.readFileSync("file4.js", "utf8")
+}, options).code, "utf8");
+fs.writeFileSync(cacheFileName, JSON.stringify(options.nameCache), "utf8");
+```
+
+An example of a combination of `minify()` options:
+```javascript
+var code = {
+    "file1.js": "function add(first, second) { return first + second; }",
+    "file2.js": "console.log(add(1 + 2, 3 + 4));"
+};
+var options = {
+    toplevel: true,
+    compress: {
+        global_defs: {
+            "@console.log": "alert"
+        },
+        passes: 2
+    },
+    format: {
+        preamble: "/* minified */"
+    }
+};
+var result = await minify(code, options);
+console.log(result.code);
+// /* minified */
+// alert(10);"
+```
+
+An error example:
+```javascript
+try {
+    const result = await minify({"foo.js" : "if (0) else console.log(1);"});
+    // Do something with result
+} catch (error) {
+    const { message, filename, line, col, pos } = error;
+    // Do something with error
+}
+```
+
+## Minify options
+
+- `ecma` (default `undefined`) - pass `5`, `2015`, `2016`, etc to override
+  `compress` and `format`'s `ecma` options.
+
+- `enclose` (default `false`) - pass `true`, or a string in the format
+  of `"args[:values]"`, where `args` and `values` are comma-separated
+  argument names and values, respectively, to embed the output in a big
+  function with the configurable arguments and values.
+
+- `parse` (default `{}`) — pass an object if you wish to specify some
+  additional [parse options](#parse-options).
+
+- `compress` (default `{}`) — pass `false` to skip compressing entirely.
+  Pass an object to specify custom [compress options](#compress-options).
+
+- `mangle` (default `true`) — pass `false` to skip mangling names, or pass
+  an object to specify [mangle options](#mangle-options) (see below).
+
+  - `mangle.properties` (default `false`) — a subcategory of the mangle option.
+    Pass an object to specify custom [mangle property options](#mangle-properties-options).
+
+- `module` (default `false`) — Use when minifying an ES6 module. "use strict"
+  is implied and names can be mangled on the top scope. If `compress` or
+  `mangle` is enabled then the `toplevel` option will be enabled.
+
+- `format` or `output` (default `null`) — pass an object if you wish to specify
+  additional [format options](#format-options).  The defaults are optimized
+  for best compression.
+
+- `sourceMap` (default `false`) - pass an object if you wish to specify
+  [source map options](#source-map-options).
+
+- `toplevel` (default `false`) - set to `true` if you wish to enable top level
+  variable and function name mangling and to drop unused variables and functions.
+
+- `nameCache` (default `null`) - pass an empty object `{}` or a previously
+  used `nameCache` object if you wish to cache mangled variable and
+  property names across multiple invocations of `minify()`. Note: this is
+  a read/write property. `minify()` will read the name cache state of this
+  object and update it during minification so that it may be
+  reused or externally persisted by the user.
+
+- `ie8` (default `false`) - set to `true` to support IE8.
+
+- `keep_classnames` (default: `undefined`) - pass `true` to prevent discarding or mangling
+  of class names. Pass a regular expression to only keep class names matching that regex.
+
+- `keep_fnames` (default: `false`) - pass `true` to prevent discarding or mangling
+  of function names. Pass a regular expression to only keep function names matching that regex.
+  Useful for code relying on `Function.prototype.name`. If the top level minify option
+  `keep_classnames` is `undefined` it will be overridden with the value of the top level
+  minify option `keep_fnames`.
+
+- `safari10` (default: `false`) - pass `true` to work around Safari 10/11 bugs in
+  loop scoping and `await`. See `safari10` options in [`mangle`](#mangle-options)
+  and [`format`](#format-options) for details.
+
+## Minify options structure
+
+```javascript
+{
+    parse: {
+        // parse options
+    },
+    compress: {
+        // compress options
+    },
+    mangle: {
+        // mangle options
+
+        properties: {
+            // mangle property options
+        }
+    },
+    format: {
+        // format options (can also use `output` for backwards compatibility)
+    },
+    sourceMap: {
+        // source map options
+    },
+    ecma: 5, // specify one of: 5, 2015, 2016, etc.
+    enclose: false, // or specify true, or "args:values"
+    keep_classnames: false,
+    keep_fnames: false,
+    ie8: false,
+    module: false,
+    nameCache: null, // or specify a name cache object
+    safari10: false,
+    toplevel: false
+}
+```
+
+### Source map options
+
+To generate a source map:
+```javascript
+var result = await minify({"file1.js": "var a = function() {};"}, {
+    sourceMap: {
+        filename: "out.js",
+        url: "out.js.map"
+    }
+});
+console.log(result.code); // minified output
+console.log(result.map);  // source map
+```
+
+Note that the source map is not saved in a file, it's just returned in
+`result.map`.  The value passed for `sourceMap.url` is only used to set
+`//# sourceMappingURL=out.js.map` in `result.code`. The value of
+`filename` is only used to set `file` attribute (see [the spec](https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k))
+in source map file.
+
+You can set option `sourceMap.url` to be `"inline"` and source map will
+be appended to code.
+
+You can also specify sourceRoot property to be included in source map:
+```javascript
+var result = await minify({"file1.js": "var a = function() {};"}, {
+    sourceMap: {
+        root: "http://example.com/src",
+        url: "out.js.map"
+    }
+});
+```
+
+If you're compressing compiled JavaScript and have a source map for it, you
+can use `sourceMap.content`:
+```javascript
+var result = await minify({"compiled.js": "compiled code"}, {
+    sourceMap: {
+        content: "content from compiled.js.map",
+        url: "minified.js.map"
+    }
+});
+// same as before, it returns `code` and `map`
+```
+
+If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.url`.
+
+If you happen to need the source map as a raw object, set `sourceMap.asObject` to `true`.
+
+<!-- API_REFERENCE:END -->
+
+<!-- OPTIONS:START -->
+
+## Parse options
+
+- `bare_returns` (default `false`) -- support top level `return` statements
+
+- `html5_comments` (default `true`)
+
+- `shebang` (default `true`) -- support `#!command` as the first line
+
+- `spidermonkey` (default `false`) -- accept a Spidermonkey (Mozilla) AST
+
+## Compress options
+
+- `defaults` (default: `true`) -- Pass `false` to disable most default
+  enabled `compress` transforms. Useful when you only want to enable a few
+  `compress` options while disabling the rest.
+
+- `arrows` (default: `true`) -- Class and object literal methods are converted
+  will also be converted to arrow expressions if the resultant code is shorter:
+  `m(){return x}` becomes `m:()=>x`. To do this to regular ES5 functions which
+  don't use `this` or `arguments`, see `unsafe_arrows`.
+
+- `arguments` (default: `false`) -- replace `arguments[index]` with function
+  parameter name whenever possible.
+
+- `booleans` (default: `true`) -- various optimizations for boolean context,
+  for example `!!a ? b : c → a ? b : c`
+
+- `booleans_as_integers` (default: `false`) -- Turn booleans into 0 and 1, also
+  makes comparisons with booleans use `==` and `!=` instead of `===` and `!==`.
+
+- `collapse_vars` (default: `true`) -- Collapse single-use non-constant variables,
+  side effects permitting.
+
+- `comparisons` (default: `true`) -- apply certain optimizations to binary nodes,
+  e.g. `!(a <= b) → a > b` (only when `unsafe_comps`), attempts to negate binary
+  nodes, e.g. `a = !b && !c && !d && !e → a=!(b||c||d||e)` etc. Note: `comparisons`
+  works best with `lhs_constants` enabled.
+
+- `computed_props` (default: `true`) -- Transforms constant computed properties
+  into regular ones: `{["computed"]: 1}` is converted to `{computed: 1}`.
+
+- `conditionals` (default: `true`) -- apply optimizations for `if`-s and conditional
+  expressions
+
+- `dead_code` (default: `true`) -- remove unreachable code
+
+- `directives` (default: `true`) -- remove redundant or non-standard directives
+
+- `drop_console` (default: `false`) -- Pass `true` to discard calls to
+  `console.*` functions. If you only want to discard a portion of console, 
+   you can pass an array like this `['log', 'info']`, which will only discard `console.log`、 `console.info`.
+
+- `drop_debugger` (default: `true`) -- remove `debugger;` statements
+
+- `ecma` (default: `5`) -- Pass `2015` or greater to enable `compress` options that
+  will transform ES5 code into smaller ES6+ equivalent forms.
+
+- `builtins_ecma` (default: `5`) -- An ES version number (like `ecma`). Tells Terser which well-known functions, constants, methods and classes are available in the global object. Does nothing by itself, but is used by `builtins_pure` and `unsafe`.
+
+- `builtins_pure` (default: `false`) -- Pass `true` to assume that functions matched by the `builtins_ecma` option (such as `Math.sin` or `unescape`) are pure and calls to them can be removed.
+
+- `evaluate` (default: `true`) -- attempt to evaluate constant expressions
+
+- `expression` (default: `false`) -- Pass `true` to preserve completion values
+  from terminal statements without `return`, e.g. in bookmarklets.
+
+- `global_defs` (default: `{}`) -- see [conditional compilation](#conditional-compilation)
+
+- `hoist_funs` (default: `false`) -- hoist function declarations
+
+- `hoist_props` (default: `true`) -- hoist properties from constant object and
+  array literals into regular variables subject to a set of constraints. For example:
+  `var o={p:1, q:2}; f(o.p, o.q);` is converted to `f(1, 2);`. Note: `hoist_props`
+  works best with `mangle` enabled, the `compress` option `passes` set to `2` or higher,
+  and the `compress` option `toplevel` enabled.
+
+- `hoist_vars` (default: `false`) -- hoist `var` declarations (this is `false`
+  by default because it seems to increase the size of the output in general)
+
+- `if_return` (default: `true`) -- optimizations for if/return and if/continue
+
+- `inline` (default: `true`) -- inline calls to function with simple/`return` statement:
+  - `false` -- same as `0`
+  - `0` -- disabled inlining
+  - `1` -- inline simple functions
+  - `2` -- inline functions with arguments
+  - `3` -- inline functions with arguments and variables
+  - `true` -- same as `3`
+
+- `join_vars` (default: `true`) -- join consecutive `var`, `let` and `const` statements
+
+- `keep_classnames` (default: `false`) -- Pass `true` to prevent the compressor from
+  discarding class names. Pass a regular expression to only keep class names matching
+  that regex. See also: the `keep_classnames` [mangle option](#mangle-options).
+
+- `keep_fargs` (default: `true`) -- Prevents the compressor from discarding unused
+  function arguments.  You need this for code which relies on `Function.length`.
+
+- `keep_fnames` (default: `false`) -- Pass `true` to prevent the
+  compressor from discarding function names. Pass a regular expression to only keep
+  function names matching that regex. Useful for code relying on `Function.prototype.name`.
+  See also: the `keep_fnames` [mangle option](#mangle-options).
+
+- `keep_infinity` (default: `false`) -- Pass `true` to prevent `Infinity` from
+  being compressed into `1/0`, which may cause performance issues on Chrome.
+
+- `lhs_constants` (default: `true`) -- Moves constant values to the left-hand side
+  of binary nodes. `foo == 42 → 42 == foo`
+
+- `loops` (default: `true`) -- optimizations for `do`, `while` and `for` loops
+  when we can statically determine the condition.
+
+- `module` (default `false`) -- Pass `true` when compressing an ES6 module. Strict
+  mode is implied and the `toplevel` option as well.
+
+- `negate_iife` (default: `true`) -- negate "Immediately-Called Function Expressions"
+  where the return value is discarded, to avoid the parens that the
+  code generator would insert.
+
+- `passes` (default: `1`) -- The maximum number of times to run compress.
+  In some cases more than one pass leads to further compressed code.  Keep in
+  mind more passes will take more time.
+
+- `properties` (default: `true`) -- rewrite property access using the dot notation, for
+  example `foo["bar"] → foo.bar`
+
+- `pure_funcs` (default: `null`) -- You can pass an array of names and
+  Terser will assume that those functions do not produce side
+  effects.  DANGER: will not check if the name is redefined in scope.
+  An example case here, for instance `var q = Math.floor(a/b)`.  If
+  variable `q` is not used elsewhere, Terser will drop it, but will
+  still keep the `Math.floor(a/b)`, not knowing what it does.  You can
+  pass `pure_funcs: [ 'Math.floor' ]` to let it know that this
+  function won't produce any side effect, in which case the whole
+  statement would get discarded.  The current implementation adds some
+  overhead (compression will be slower).
+
+- `pure_getters` (default: `"strict"`) -- If you pass `true` for
+  this, Terser will assume that object property access
+  (e.g. `foo.bar` or `foo["bar"]`) doesn't have any side effects.
+  Specify `"strict"` to treat `foo.bar` as side-effect-free only when
+  `foo` is certain to not throw, i.e. not `null` or `undefined`.
+
+- `pure_new` (default: `false`) -- Set to `true` to assume `new X()` never has
+  side effects.
+
+- `reduce_vars` (default: `true`) -- Improve optimization on variables assigned with and
+  used as constant values.
+
+- `reduce_funcs` (default: `true`) -- Inline single-use functions when
+  possible. Depends on `reduce_vars` being enabled.  Disabling this option
+  sometimes improves performance of the output code.
+
+- `sequences` (default: `true`) -- join consecutive simple statements using the
+  comma operator.  May be set to a positive integer to specify the maximum number
+  of consecutive comma sequences that will be generated. If this option is set to
+  `true` then the default `sequences` limit is `200`. Set option to `false` or `0`
+  to disable. The smallest `sequences` length is `2`. A `sequences` value of `1`
+  is grandfathered to be equivalent to `true` and as such means `200`. On rare
+  occasions the default sequences limit leads to very slow compress times in which
+  case a value of `20` or less is recommended.
+
+- `side_effects` (default: `true`) -- Remove expressions which have no side effects
+  and whose results aren't used.
+
+- `switches` (default: `true`) -- de-duplicate and remove unreachable `switch` branches
+
+- `toplevel` (default: `false`) -- drop unreferenced functions (`"funcs"`) and/or
+  variables (`"vars"`) in the top level scope (`false` by default, `true` to drop
+  both unreferenced functions and variables)
+
+- `top_retain` (default: `null`) -- prevent specific toplevel functions and
+  variables from `unused` removal (can be array, comma-separated, RegExp or
+  function. Implies `toplevel`)
+
+- `typeofs` (default: `true`) -- Transforms `typeof foo == "undefined"` into
+  `foo === void 0`.  Note: recommend to set this value to `false` for IE10 and
+  earlier versions due to known issues.
+
+- `unsafe` (default: `false`) -- apply "unsafe" transformations
+  ([details](#the-unsafe-compress-option)).
+
+- `unsafe_arrows` (default: `false`) -- Convert ES5 style anonymous function
+  expressions to arrow functions if the function body does not reference `this`.
+  Note: it is not always safe to perform this conversion if code relies on the
+  the function having a `prototype`, which arrow functions lack.
+  This transform requires that the `ecma` compress option is set to `2015` or greater.
+
+- `unsafe_comps` (default: `false`) -- Reverse `<` and `<=` to `>` and `>=` to
+  allow improved compression. This might be unsafe when an at least one of two
+  operands is an object with computed values due the use of methods like `get`,
+  or `valueOf`. This could cause change in execution order after operands in the
+  comparison are switching. Or if one of two operands is `NaN`, the result is always
+  `false`. Compression only works if both `comparisons` and
+  `unsafe_comps` are both set to true.
+
+- `unsafe_Function` (default: `false`) -- compress and mangle `Function(args, code)`
+  when both `args` and `code` are string literals.
+
+- `unsafe_math` (default: `false`) -- optimize numerical expressions like
+  `2 * x * 3` into `6 * x`, which may give imprecise floating point results.
+
+- `unsafe_symbols` (default: `false`) -- removes keys from native Symbol
+  declarations, e.g `Symbol("kDog")` becomes `Symbol()`.
+
+- `unsafe_methods` (default: false) -- Converts `{ m: function(){} }` to
+  `{ m(){} }`. `ecma` must be set to `6` or greater to enable this transform.
+  If `unsafe_methods` is a RegExp then key/value pairs with keys matching the
+  RegExp will be converted to concise methods.
+  Note: if enabled there is a risk of getting a "`<method name>` is not a
+  constructor" TypeError should any code try to `new` the former function.
+
+- `unsafe_proto` (default: `false`) -- optimize expressions like
+  `Array.prototype.slice.call(a)` into `[].slice.call(a)`
+
+- `unsafe_regexp` (default: `false`) -- enable substitutions of variables with
+  `RegExp` values the same way as if they are constants.
+
+- `unsafe_undefined` (default: `false`) -- substitute `void 0` if there is a
+  variable named `undefined` in scope (variable name will be mangled, typically
+  reduced to a single character)
+
+- `unused` (default: `true`) -- drop unreferenced functions and variables (simple
+  direct variable assignments do not count as references unless set to `"keep_assign"`)
+
+## Mangle options
+
+- `eval` (default `false`) -- Pass `true` to mangle names visible in scopes
+  where `eval` or `with` are used.
+
+- `keep_classnames` (default `false`) -- Pass `true` to not mangle class names.
+  Pass a regular expression to only keep class names matching that regex.
+  See also: the `keep_classnames` [compress option](#compress-options).
+
+- `keep_fnames` (default `false`) -- Pass `true` to not mangle function names.
+  Pass a regular expression to only keep function names matching that regex.
+  Useful for code relying on `Function.prototype.name`. See also: the `keep_fnames`
+  [compress option](#compress-options).
+
+- `module` (default `false`) -- Pass `true` an ES6 modules, where the toplevel
+  scope is not the global scope. Implies `toplevel` and assumes input code is strict mode JS.
+
+- `nth_identifier` (default: an internal mangler that weights based on character
+  frequency analysis) -- Pass an object with a `get(n)` function that converts an
+  ordinal into the nth most favored (usually shortest) identifier.
+  Optionally also provide `reset()`, `sort()`, and `consider(chars, delta)` to
+  use character frequency analysis of the source code.
+
+- `reserved` (default `[]`) -- Pass an array of identifiers that should be
+  excluded from mangling. Example: `["foo", "bar"]`.
+
+- `toplevel` (default `false`) -- Pass `true` to mangle names declared in the
+  top level scope.
+
+- `safari10` (default `false`) -- Pass `true` to work around the Safari 10 loop
+  iterator [bug](https://bugs.webkit.org/show_bug.cgi?id=171041)
+  "Cannot declare a let variable twice".
+  See also: the `safari10` [format option](#format-options).
+
+Examples:
+
+```javascript
+// test.js
+var globalVar;
+function funcName(firstLongName, anotherLongName) {
+    var myVariable = firstLongName +  anotherLongName;
+}
+```
+```javascript
+var code = fs.readFileSync("test.js", "utf8");
+
+await minify(code).code;
+// 'function funcName(a,n){}var globalVar;'
+
+await minify(code, { mangle: { reserved: ['firstLongName'] } }).code;
+// 'function funcName(firstLongName,a){}var globalVar;'
+
+await minify(code, { mangle: { toplevel: true } }).code;
+// 'function n(n,a){}var a;'
+```
+
+### Mangle properties options
+
+- `builtins` (default: `false`) — Use `true` to allow the mangling of builtin
+  DOM properties. Not recommended to override this setting.
+
+- `debug` (default: `false`) — Mangle names with the original name still present.
+  Pass an empty string `""` to enable, or a non-empty string to set the debug suffix.
+
+- `keep_quoted` (default: `false`) — How quoting properties (`{"prop": ...}` and `obj["prop"]`) controls what gets mangled.
+  - `"strict"` (recommended) -- `obj.prop` is mangled.
+  - `false` -- `obj["prop"]` is mangled.
+  - `true` -- `obj.prop` is mangled unless there is `obj["prop"]` elsewhere in the code.
+
+- `nth_identifier` (default: an internal mangler that weights based on character
+  frequency analysis) -- Pass an object with a `get(n)` function that converts an
+  ordinal into the nth most favored (usually shortest) identifier.
+  Optionally also provide `reset()`, `sort()`, and `consider(chars, delta)` to
+  use character frequency analysis of the source code.
+
+- `regex` (default: `null`) — Pass a [RegExp literal or pattern string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp) to only mangle property matching the regular expression.
+
+- `reserved` (default: `[]`) — Do not mangle property names listed in the
+  `reserved` array.
+
+- `undeclared` (default: `false`) - Mangle those names when they are accessed
+  as properties of known top level variables but their declarations are never
+  found in input code. May be useful when only minifying parts of a project.
+  See [#397](https://github.com/terser/terser/issues/397) for more details.
+
+
+## Format options
+
+These options control the format of Terser's output code. Previously known
+as "output options".
+
+- `ascii_only` (default `false`) -- escape Unicode characters in strings and
+  regexps (affects directives with non-ascii characters becoming invalid)
+
+- `beautify` (default `false`) -- (DEPRECATED) whether to beautify the output.
+  When using the legacy `-b` CLI flag, this is set to true by default.
+
+- `braces` (default `false`) -- always insert braces in `if`, `for`,
+  `do`, `while` or `with` statements, even if their body is a single
+  statement.
+
+- `comments` (default `"some"`) -- by default it keeps JSDoc-style comments
+  that contain "@license", "@copyright", "@preserve" or start with `!`, pass `true`
+  or `"all"` to preserve all comments, `false` to omit comments in the output,
+  a regular expression string (e.g. `/^!/`) or a function.
+
+- `ecma` (default `5`) -- set desired EcmaScript standard version for output.
+  Set `ecma` to `2015` or greater to emit shorthand object properties - i.e.:
+  `{a}` instead of `{a: a}`.  The `ecma` option will only change the output in
+  direct control of the beautifier. Non-compatible features in your input will
+  still be output as is. For example: an `ecma` setting of `5` will **not**
+  convert modern code to ES5.
+
+- `indent_level` (default `4`)
+
+- `indent_start` (default `0`) -- prefix all lines by that many spaces
+
+- `inline_script` (default `true`) -- escape HTML comments and the slash in
+  occurrences of `</script>` in strings
+
+- `keep_numbers` (default `false`) -- keep number literals as it was in original code
+ (disables optimizations like converting `1000000` into `1e6`)
+
+- `keep_quoted_props` (default `false`) -- when turned on, prevents stripping
+  quotes from property names in object literals.
+
+- `max_line_len` (default `false`) -- maximum line length (for minified code)
+
+- `preamble` (default `null`) -- when passed it must be a string and
+  it will be prepended to the output literally.  The source map will
+  adjust for this text.  Can be used to insert a comment containing
+  licensing information, for example.
+
+- `quote_keys` (default `false`) -- pass `true` to quote all keys in literal
+  objects
+
+- `quote_style` (default `0`) -- preferred quote style for strings (affects
+  quoted property names and directives as well):
+  - `0` -- prefers double quotes, switches to single quotes when there are
+    more double quotes in the string itself. `0` is best for gzip size.
+  - `1` -- always use single quotes
+  - `2` -- always use double quotes
+  - `3` -- always use the original quotes
+
+- `preserve_annotations` -- (default `false`) -- Preserve [Terser annotations](#annotations) in the output.
+
+- `safari10` (default `false`) -- set this option to `true` to work around
+  the [Safari 10/11 await bug](https://bugs.webkit.org/show_bug.cgi?id=176685).
+  See also: the `safari10` [mangle option](#mangle-options).
+
+- `semicolons` (default `true`) -- separate statements with semicolons.  If
+  you pass `false` then whenever possible we will use a newline instead of a
+  semicolon, leading to more readable output of minified code (size before
+  gzip could be smaller; size after gzip insignificantly larger).
+
+- `shebang` (default `true`) -- preserve shebang `#!` in preamble (bash scripts)
+
+- `spidermonkey` (default `false`) -- produce a Spidermonkey (Mozilla) AST
+
+- `webkit` (default `false`) -- enable workarounds for WebKit bugs.
+  PhantomJS users should set this option to `true`.
+
+- `wrap_iife` (default `false`) -- pass `true` to wrap immediately invoked
+  function expressions. See
+  [#640](https://github.com/mishoo/UglifyJS2/issues/640) for more details.
+
+- `wrap_func_args` (default `false`) -- pass `true` in order to wrap
+  function expressions that are passed as arguments, in parenthesis. See
+  [OptimizeJS](https://github.com/nolanlawson/optimize-js) for more details.
+
+
+<!-- OPTIONS:END -->
+
+
+# Miscellaneous
+
+<!-- MISCELLANEOUS:START -->
+
+### Keeping copyright notices or other comments
+
+You can pass `--comments` to retain certain comments in the output.  By
+default it will keep comments starting with "!" and JSDoc-style comments that
+contain "@preserve", "@copyright", "@license" or "@cc_on" (conditional compilation for IE).
+You can pass `--comments all` to keep all the comments, or a valid JavaScript regexp to
+keep only comments that match this regexp.  For example `--comments /^!/`
+will keep comments like `/*! Copyright Notice */`.
+
+Note, however, that there might be situations where comments are lost.  For
+example:
+```javascript
+function f() {
+    /** @preserve Foo Bar */
+    function g() {
+        // this function is never called
+    }
+    return something();
+}
+```
+
+Even though it has "@preserve", the comment will be lost because the inner
+function `g` (which is the AST node to which the comment is attached to) is
+discarded by the compressor as not referenced.
+
+The safest comments where to place copyright information (or other info that
+needs to be kept in the output) are comments attached to toplevel nodes.
+
+### The `unsafe` `compress` option
+
+It enables some transformations that *might* break code logic in certain
+contrived cases, but should be fine for most code.  It assumes that standard
+built-in ECMAScript functions and classes have not been altered or replaced.
+You might want to try it on your own code; it should reduce the minified size.
+Some examples of the optimizations made when this option is enabled:
+
+- `new Array(1, 2, 3)` or `Array(1, 2, 3)` → `[ 1, 2, 3 ]`
+- `Array.from([1, 2, 3])` → `[1, 2, 3]`
+- `new Object()` → `{}`
+- `String(exp)` or `exp.toString()` → `"" + exp`
+- `new Object/RegExp/Function/Error/Array (...)` → we discard the `new`
+- `"foo bar".substr(4)` → `"bar"`
+
+### Conditional compilation
+
+You can use the `--define` (`-d`) switch in order to declare global
+variables that Terser will assume to be constants (unless defined in
+scope).  For example if you pass `--define DEBUG=false` then, coupled with
+dead code removal Terser will discard the following from the output:
+```javascript
+if (DEBUG) {
+    console.log("debug stuff");
+}
+```
+
+You can specify nested constants in the form of `--define env.DEBUG=false`.
+
+Another way of doing that is to declare your globals as constants in a
+separate file and include it into the build.  For example you can have a
+`build/defines.js` file with the following:
+```javascript
+var DEBUG = false;
+var PRODUCTION = true;
+// etc.
+```
+
+and build your code like this:
+
+    terser build/defines.js js/foo.js js/bar.js... -c
+
+Terser will notice the constants and, since they cannot be altered, it
+will evaluate references to them to the value itself and drop unreachable
+code as usual.  The build will contain the `const` declarations if you use
+them. If you are targeting < ES6 environments which does not support `const`,
+using `var` with `reduce_vars` (enabled by default) should suffice.
+
+### Conditional compilation API
+
+You can also use conditional compilation via the programmatic API. With the difference that the
+property name is `global_defs` and is a compressor property:
+
+```javascript
+var result = await minify(fs.readFileSync("input.js", "utf8"), {
+    compress: {
+        dead_code: true,
+        global_defs: {
+            DEBUG: false
+        }
+    }
+});
+```
+
+To replace an identifier with an arbitrary non-constant expression it is
+necessary to prefix the `global_defs` key with `"@"` to instruct Terser
+to parse the value as an expression:
+```javascript
+await minify("alert('hello');", {
+    compress: {
+        global_defs: {
+            "@alert": "console.log"
+        }
+    }
+}).code;
+// returns: 'console.log("hello");'
+```
+
+Otherwise it would be replaced as string literal:
+```javascript
+await minify("alert('hello');", {
+    compress: {
+        global_defs: {
+            "alert": "console.log"
+        }
+    }
+}).code;
+// returns: '"console.log"("hello");'
+```
+
+### Annotations
+
+Annotations in Terser are a way to tell it to treat a certain function call differently. The following annotations are available:
+
+ * `/*@__INLINE__*/` - forces a function to be inlined somewhere.
+ * `/*@__NOINLINE__*/` - Makes sure the called function is not inlined into the call site.
+ * `/*@__PURE__*/` - Marks a function call as pure. That means, it can safely be dropped.
+ * `/*@__KEY__*/` - Marks a string literal as a property to also mangle it when mangling properties.
+ * `/*@__MANGLE_PROP__*/` - Opts-in an object property (or class field) for mangling, when the property mangler is enabled.
+
+You can use either a `@` sign at the start, or a `#`.
+
+Here are some examples on how to use them:
+
+```javascript
+/*@__INLINE__*/
+function_always_inlined_here()
+
+/*#__NOINLINE__*/
+function_cant_be_inlined_into_here()
+
+const x = /*#__PURE__*/i_am_dropped_if_x_is_not_used()
+
+function lookup(object, key) { return object[key]; }
+lookup({ i_will_be_mangled_too: "bar" }, /*@__KEY__*/ "i_will_be_mangled_too");
+```
+
+### ESTree / SpiderMonkey AST
+
+Terser has its own abstract syntax tree format; for
+[practical reasons](http://lisperator.net/blog/uglifyjs-why-not-switching-to-spidermonkey-ast/)
+we can't easily change to using the SpiderMonkey AST internally.  However,
+Terser now has a converter which can import a SpiderMonkey AST.
+
+For example [Acorn](https://github.com/acornjs/acorn) is a super-fast parser that produces a
+SpiderMonkey AST.  It has a small CLI utility that parses one file and dumps
+the AST in JSON on the standard output.  To use Terser to mangle and
+compress that:
+
+    acorn file.js | terser -p spidermonkey -m -c
+
+The `-p spidermonkey` option tells Terser that all input files are not
+JavaScript, but JS code described in SpiderMonkey AST in JSON.  Therefore we
+don't use our own parser in this case, but just transform that AST into our
+internal AST.
+
+`spidermonkey` is also available in `minify` as `parse` and `format` options to
+accept and/or produce a spidermonkey AST.
+
+### Use Acorn for parsing
+
+More for fun, I added the `-p acorn` option which will use Acorn to do all
+the parsing.  If you pass this option, Terser will `require("acorn")`.
+
+Acorn is really fast (e.g. 250ms instead of 380ms on some 650K code), but
+converting the SpiderMonkey tree that Acorn produces takes another 150ms so
+in total it's a bit more than just using Terser's own parser.
+
+### Terser Fast Minify Mode
+
+It's not well known, but whitespace removal and symbol mangling accounts
+for 95% of the size reduction in minified code for most JavaScript - not
+elaborate code transforms. One can simply disable `compress` to speed up
+Terser builds by 3 to 4 times.
+
+| d3.js | size | gzip size | time (s) |
+|   --- | ---: |      ---: |     ---: |
+| original                                    | 451,131 | 108,733 |     - |
+| terser@3.7.5 mangle=false, compress=false   | 316,600 |  85,245 |  0.82 |
+| terser@3.7.5 mangle=true, compress=false    | 220,216 |  72,730 |  1.45 |
+| terser@3.7.5 mangle=true, compress=true     | 212,046 |  70,954 |  5.87 |
+| babili@0.1.4                                | 210,713 |  72,140 | 12.64 |
+| babel-minify@0.4.3                          | 210,321 |  72,242 | 48.67 |
+| babel-minify@0.5.0-alpha.01eac1c3           | 210,421 |  72,238 | 14.17 |
+
+To enable fast minify mode from the CLI use:
+```
+terser file.js -m
+```
+To enable fast minify mode with the API use:
+```js
+await minify(code, { compress: false, mangle: true });
+```
+
+#### Source maps and debugging
+
+Various `compress` transforms that simplify, rearrange, inline and remove code
+are known to have an adverse effect on debugging with source maps. This is
+expected as code is optimized and mappings are often simply not possible as
+some code no longer exists. For highest fidelity in source map debugging
+disable the `compress` option and just use `mangle`.
+
+When debugging, make sure you enable the **"map scopes"** feature to map mangled variable names back to their original names.  
+Without this, all variable values will be `undefined`. See https://github.com/terser/terser/issues/1367 for more details.
+<br/><br/>
+
+![image](https://user-images.githubusercontent.com/27283110/230441652-ac5cf6b0-5dc5-4ffc-9d8b-bd02875484f4.png)
+
+### Compiler assumptions
+
+To allow for better optimizations, the compiler makes various assumptions:
+
+- `.toString()` and `.valueOf()` don't have side effects, and for built-in
+  objects they have not been overridden.
+- `undefined`, `NaN` and `Infinity` have not been externally redefined.
+- `arguments.callee`, `arguments.caller` and `Function.prototype.caller` are not used.
+- The code doesn't expect the contents of `Function.prototype.toString()` or
+  `Error.prototype.stack` to be anything in particular.
+- Getting and setting properties on a plain object does not cause other side effects
+  (using `.watch()` or `Proxy`).
+- Object properties can be added, removed and modified (not prevented with
+  `Object.defineProperty()`, `Object.defineProperties()`, `Object.freeze()`,
+  `Object.preventExtensions()` or `Object.seal()`).
+- `document.all` is not `== null`
+- Assigning properties to a class doesn't have side effects and does not throw.
+
+### Build Tools and Adaptors using Terser
+
+https://www.npmjs.com/browse/depended/terser
+
+### Replacing `uglify-es` with `terser` in a project using `yarn`
+
+A number of JS bundlers and uglify wrappers are still using buggy versions
+of `uglify-es` and have not yet upgraded to `terser`. If you are using `yarn`
+you can add the following alias to your project's `package.json` file:
+
+```js
+  "resolutions": {
+    "uglify-es": "npm:terser"
+  }
+```
+
+to use `terser` instead of `uglify-es` in all deeply nested dependencies
+without changing any code.
+
+Note: for this change to take effect you must run the following commands
+to remove the existing `yarn` lock file and reinstall all packages:
+
+```
+$ rm -rf node_modules yarn.lock
+$ yarn
+```
+
+<!-- MISCELLANEOUS:END -->
+
+# Reporting issues
+
+<!-- REPORTING_ISSUES:START -->
+
+## A minimal, reproducible example
+
+You're expected to provide a [minimal reproducible example] of input code that will demonstrate your issue.
+
+To get to this example, you can remove bits of your code and stop if your issue ceases to reproduce.
+
+## Obtaining the source code given to Terser
+
+Because users often don't control the call to `await minify()` or its arguments, Terser provides a `TERSER_DEBUG_DIR` environment variable to make terser output some debug logs.
+
+These logs will contain the input code and options of each `minify()` call.
+
+```bash
+TERSER_DEBUG_DIR=/tmp/terser-log-dir command-that-uses-terser
+ls /tmp/terser-log-dir
+terser-debug-123456.log
+```
+
+If you're not sure how to set an environment variable on your shell (the above example works in bash), you can try using cross-env:
+
+```
+> npx cross-env TERSER_DEBUG_DIR=/path/to/logs command-that-uses-terser
+```
+
+## Stack traces
+
+In the terser CLI we use [source-map-support](https://npmjs.com/source-map-support) to produce good error stacks. In your own app, you're expected to enable source-map-support (read their docs) to have nice stack traces that will help you write good issues.
+
+<!-- REPORTING_ISSUES:END -->
+
+# README.md Patrons:
+
+*note*: <s>You can support this project on patreon: [link]</s> **The Terser Patreon is shutting down in favor of opencollective**. Check out [PATRONS.md](https://github.com/terser/terser/blob/master/PATRONS.md) for our first-tier patrons.
+
+These are the second-tier patrons. Great thanks for your support!
+
+ * CKEditor ![](https://c10.patreonusercontent.com/3/eyJoIjoxMDAsInciOjEwMH0%3D/patreon-media/p/user/15452278/f8548dcf48d740619071e8d614459280/1?token-time=2145916800&token-hash=SIQ54PhIPHv3M7CVz9LxS8_8v4sOw4H304HaXsXj8MM%3D)
+ * 38elements ![](https://c10.patreonusercontent.com/3/eyJ3IjoyMDB9/patreon-media/p/user/12501844/88e7fc5dd62d45c6a5626533bbd48cfb/1?token-time=2145916800&token-hash=c3AsQ5T0IQWic0zKxFHu-bGGQJkXQFvafvJ4bPerFR4%3D)
+
+## Contributors
+
+### Code Contributors
+
+This project exists thanks to all the people who contribute. [[Contribute](CONTRIBUTING.md)].
+<a href="https://github.com/terser/terser/graphs/contributors"><img src="https://opencollective.com/terser/contributors.svg?width=890&button=false" /></a>
+
+### Financial Contributors
+
+Become a financial contributor and help us sustain our community. [[Contribute](https://opencollective.com/terser/contribute)]
+
+#### Individuals
+
+<a href="https://opencollective.com/terser"><img src="https://opencollective.com/terser/individuals.svg?width=890"></a>
+
+#### Organizations
+
+Support this project with your organization. Your logo will show up here with a link to your website. [[Contribute](https://opencollective.com/terser/contribute)]
+
+<a href="https://opencollective.com/terser/organization/0/website"><img src="https://opencollective.com/terser/organization/0/avatar.svg"></a>
+<a href="https://opencollective.com/terser/organization/1/website"><img src="https://opencollective.com/terser/organization/1/avatar.svg"></a>
+<a href="https://opencollective.com/terser/organization/2/website"><img src="https://opencollective.com/terser/organization/2/avatar.svg"></a>
+<a href="https://opencollective.com/terser/organization/3/website"><img src="https://opencollective.com/terser/organization/3/avatar.svg"></a>
+<a href="https://opencollective.com/terser/organization/4/website"><img src="https://opencollective.com/terser/organization/4/avatar.svg"></a>
+<a href="https://opencollective.com/terser/organization/5/website"><img src="https://opencollective.com/terser/organization/5/avatar.svg"></a>
+<a href="https://opencollective.com/terser/organization/6/website"><img src="https://opencollective.com/terser/organization/6/avatar.svg"></a>
+<a href="https://opencollective.com/terser/organization/7/website"><img src="https://opencollective.com/terser/organization/7/avatar.svg"></a>
+<a href="https://opencollective.com/terser/organization/8/website"><img src="https://opencollective.com/terser/organization/8/avatar.svg"></a>
+<a href="https://opencollective.com/terser/organization/9/website"><img src="https://opencollective.com/terser/organization/9/avatar.svg"></a>
Index: frontend/node_modules/terser/bin/package.json
===================================================================
--- frontend/node_modules/terser/bin/package.json	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/bin/package.json	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,10 @@
+{
+  "name": "bin",
+  "private": true,
+  "version": "1.0.0",
+  "main": "terser",
+  "type": "commonjs",
+  "author": "",
+  "license": "BSD-2-Clause",
+  "description": "A package to hold the Terser bin bundle as commonjs while keeping the rest of it ESM."
+}
Index: frontend/node_modules/terser/bin/terser
===================================================================
--- frontend/node_modules/terser/bin/terser	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/bin/terser	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,21 @@
+#!/usr/bin/env node
+
+"use strict";
+
+require("../tools/exit.cjs");
+
+try {
+    require("source-map-support").install();
+} catch (err) {}
+
+const fs = require("fs");
+const path = require("path");
+const program = require("commander");
+
+const packageJson = require("../package.json");
+const { _run_cli: run_cli } = require("..");
+
+run_cli({ program, packageJson, fs, path }).catch((error) => {
+    console.error(error);
+    process.exitCode = 1;
+});
Index: frontend/node_modules/terser/bin/uglifyjs
===================================================================
--- frontend/node_modules/terser/bin/uglifyjs	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/bin/uglifyjs	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,10 @@
+#!/usr/bin/env node
+// -*- js -*-
+/* eslint-env node */
+
+"use strict";
+
+process.stderr.write( "DEPRECATION WARNING: uglifyjs binary will soon be discontinued!\n");
+process.stderr.write("Please use \"terser\" instead.\n\n");
+
+require("./terser");
Index: frontend/node_modules/terser/dist/bundle.min.js
===================================================================
--- frontend/node_modules/terser/dist/bundle.min.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/dist/bundle.min.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,34278 @@
+(function (global, factory) {
+typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@jridgewell/source-map')) :
+typeof define === 'function' && define.amd ? define(['exports', '@jridgewell/source-map'], factory) :
+(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.Terser = {}, global.sourceMap));
+})(this, (function (exports, sourceMap) { 'use strict';
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+function characters(str) {
+    return str.split("");
+}
+
+function member(name, array) {
+    return array.includes(name);
+}
+
+class DefaultsError extends Error {
+    constructor(msg, defs) {
+        super();
+
+        this.name = "DefaultsError";
+        this.message = msg;
+        this.defs = defs;
+    }
+}
+
+function defaults(args, defs, croak) {
+    if (args === true) {
+        args = {};
+    } else if (args != null && typeof args === "object") {
+        args = {...args};
+    }
+
+    const ret = args || {};
+
+    if (croak) for (const i in ret) if (HOP(ret, i) && !HOP(defs, i)) {
+        throw new DefaultsError("`" + i + "` is not a supported option", defs);
+    }
+
+    for (const i in defs) if (HOP(defs, i)) {
+        if (!args || !HOP(args, i)) {
+            ret[i] = defs[i];
+        } else if (i === "ecma" || i === "builtins_ecma") {
+            let ecma = args[i] | 0;
+            if (ecma > 5 && ecma < 2015) ecma += 2009;
+            ret[i] = ecma;
+        } else {
+            ret[i] = (args && HOP(args, i)) ? args[i] : defs[i];
+        }
+    }
+
+    return ret;
+}
+
+function noop() {}
+function return_false() { return false; }
+function return_true() { return true; }
+function return_this() { return this; }
+function return_null() { return null; }
+
+var MAP = (function() {
+    function MAP(a, tw, allow_splicing = true) {
+        const new_a = [];
+
+        for (let i = 0; i < a.length; ++i) {
+            let item = a[i];
+            let ret = item.transform(tw, allow_splicing);
+
+            if (ret instanceof AST_Node) {
+                new_a.push(ret);
+            } else if (ret instanceof Splice) {
+                new_a.push(...ret.v);
+            }
+        }
+
+        return new_a;
+    }
+
+    MAP.splice = function(val) { return new Splice(val); };
+    MAP.skip = {};
+    function Splice(val) { this.v = val; }
+    return MAP;
+})();
+
+function make_node(ctor, orig, props) {
+    if (!props) props = {};
+    if (orig) {
+        if (!props.start) props.start = orig.start;
+        if (!props.end) props.end = orig.end;
+    }
+    return new ctor(props);
+}
+
+/** Makes a `void 0` expression. Use instead of AST_Undefined which may conflict
+ * with an existing variable called `undefined` */
+function make_void_0(orig) {
+    return make_node(AST_UnaryPrefix, orig, {
+        operator: "void",
+        expression: make_node(AST_Number, orig, { value: 0 })
+    });
+}
+
+function push_uniq(array, el) {
+    if (!array.includes(el))
+        array.push(el);
+}
+
+function string_template(text, props) {
+    return text.replace(/{(.+?)}/g, function(str, p) {
+        return props && props[p];
+    });
+}
+
+function remove(array, el) {
+    for (var i = array.length; --i >= 0;) {
+        if (array[i] === el) array.splice(i, 1);
+    }
+}
+
+function mergeSort(array, cmp) {
+    if (array.length < 2) return array.slice();
+    function merge(a, b) {
+        var r = [], ai = 0, bi = 0, i = 0;
+        while (ai < a.length && bi < b.length) {
+            cmp(a[ai], b[bi]) <= 0
+                ? r[i++] = a[ai++]
+                : r[i++] = b[bi++];
+        }
+        if (ai < a.length) r.push.apply(r, a.slice(ai));
+        if (bi < b.length) r.push.apply(r, b.slice(bi));
+        return r;
+    }
+    function _ms(a) {
+        if (a.length <= 1)
+            return a;
+        var m = Math.floor(a.length / 2), left = a.slice(0, m), right = a.slice(m);
+        left = _ms(left);
+        right = _ms(right);
+        return merge(left, right);
+    }
+    return _ms(array);
+}
+
+function makePredicate(words) {
+    if (!Array.isArray(words)) words = words.split(" ");
+
+    return new Set(words.sort());
+}
+
+function map_add(map, key, value) {
+    if (map.has(key)) {
+        map.get(key).push(value);
+    } else {
+        map.set(key, [ value ]);
+    }
+}
+
+function map_from_object(obj) {
+    var map = new Map();
+    for (var key in obj) {
+        if (HOP(obj, key) && key.charAt(0) === "$") {
+            map.set(key.substr(1), obj[key]);
+        }
+    }
+    return map;
+}
+
+function map_to_object(map) {
+    var obj = Object.create(null);
+    map.forEach(function (value, key) {
+        obj["$" + key] = value;
+    });
+    return obj;
+}
+
+function HOP(obj, prop) {
+    return Object.prototype.hasOwnProperty.call(obj, prop);
+}
+
+function keep_name(keep_setting, name) {
+    return keep_setting === true
+        || (keep_setting instanceof RegExp && keep_setting.test(name));
+}
+
+var lineTerminatorEscape = {
+    "\0": "0",
+    "\n": "n",
+    "\r": "r",
+    "\u2028": "u2028",
+    "\u2029": "u2029",
+};
+function regexp_source_fix(source) {
+    // V8 does not escape line terminators in regexp patterns in node 12
+    // We'll also remove literal \0
+    return source.replace(/[\0\n\r\u2028\u2029]/g, function (match, offset) {
+        var escaped = source[offset - 1] == "\\"
+            && (source[offset - 2] != "\\"
+            || /(?:^|[^\\])(?:\\{2})*$/.test(source.slice(0, offset - 1)));
+        return (escaped ? "" : "\\") + lineTerminatorEscape[match];
+    });
+}
+
+// Subset of regexps that is not going to cause regexp based DDOS
+// https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS
+const re_safe_regexp = /^[\\/|\0\s\w^$.[\]()]*$/;
+
+/** Check if the regexp is safe for Terser to create without risking a RegExp DOS */
+const regexp_is_safe = (source) => re_safe_regexp.test(source);
+
+const all_flags = "dgimsuyv";
+function sort_regexp_flags(flags) {
+    const existing_flags = new Set(flags.split(""));
+    let out = "";
+    for (const flag of all_flags) {
+        if (existing_flags.has(flag)) {
+            out += flag;
+            existing_flags.delete(flag);
+        }
+    }
+    if (existing_flags.size) {
+        // Flags Terser doesn't know about
+        existing_flags.forEach(flag => { out += flag; });
+    }
+    return out;
+}
+
+function has_annotation(node, annotation) {
+    return node._annotations & annotation;
+}
+
+function set_annotation(node, annotation) {
+    node._annotations |= annotation;
+}
+
+function clear_annotation(node, annotation) {
+    node._annotations &= ~annotation;
+}
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+    Parser based on parse-js (http://marijn.haverbeke.nl/parse-js/).
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+var LATEST_RAW = "";  // Only used for numbers and template strings
+var TEMPLATE_RAWS = new Map();  // Raw template strings
+
+var KEYWORDS = "break case catch class const continue debugger default delete do else export extends finally for function if in instanceof let new return switch throw try typeof var void while with";
+var KEYWORDS_ATOM = "false null true";
+var RESERVED_WORDS = "enum import super this " + KEYWORDS_ATOM + " " + KEYWORDS;
+var ALL_RESERVED_WORDS = "implements interface package private protected public static " + RESERVED_WORDS;
+var KEYWORDS_BEFORE_EXPRESSION = "return new delete throw else case yield await";
+
+KEYWORDS = makePredicate(KEYWORDS);
+RESERVED_WORDS = makePredicate(RESERVED_WORDS);
+KEYWORDS_BEFORE_EXPRESSION = makePredicate(KEYWORDS_BEFORE_EXPRESSION);
+KEYWORDS_ATOM = makePredicate(KEYWORDS_ATOM);
+ALL_RESERVED_WORDS = makePredicate(ALL_RESERVED_WORDS);
+
+var OPERATOR_CHARS = makePredicate(characters("+-*&%=<>!?|~^"));
+
+var RE_HEX_NUMBER = /^0x[0-9a-f]+$/i;
+var RE_OCT_NUMBER = /^0[0-7]+$/;
+var RE_ES6_OCT_NUMBER = /^0o[0-7]+$/i;
+var RE_BIN_NUMBER = /^0b[01]+$/i;
+var RE_DEC_NUMBER = /^\d*\.?\d*(?:e[+-]?\d*(?:\d\.?|\.?\d)\d*)?$/i;
+var RE_BIG_INT = /^(0[xob])?[0-9a-f]+n$/i;
+
+var RE_KEYWORD_RELATIONAL_OPERATORS = /in(?:stanceof)?/y;
+
+var OPERATORS = makePredicate([
+    "in",
+    "instanceof",
+    "typeof",
+    "new",
+    "void",
+    "delete",
+    "++",
+    "--",
+    "+",
+    "-",
+    "!",
+    "~",
+    "&",
+    "|",
+    "^",
+    "*",
+    "**",
+    "/",
+    "%",
+    ">>",
+    "<<",
+    ">>>",
+    "<",
+    ">",
+    "<=",
+    ">=",
+    "==",
+    "===",
+    "!=",
+    "!==",
+    "?",
+    "=",
+    "+=",
+    "-=",
+    "||=",
+    "&&=",
+    "??=",
+    "/=",
+    "*=",
+    "**=",
+    "%=",
+    ">>=",
+    "<<=",
+    ">>>=",
+    "|=",
+    "^=",
+    "&=",
+    "&&",
+    "??",
+    "||",
+]);
+
+var WHITESPACE_CHARS = makePredicate(characters(" \u00a0\n\r\t\f\u000b\u200b\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u2028\u2029\u202f\u205f\u3000\uFEFF"));
+
+var NEWLINE_CHARS = makePredicate(characters("\n\r\u2028\u2029"));
+
+var PUNC_AFTER_EXPRESSION = makePredicate(characters(";]),:"));
+
+var PUNC_BEFORE_EXPRESSION = makePredicate(characters("[{(,;:"));
+
+var PUNC_CHARS = makePredicate(characters("[]{}(),;:"));
+
+/* -----[ Tokenizer ]----- */
+
+// surrogate safe regexps adapted from https://github.com/mathiasbynens/unicode-8.0.0/tree/89b412d8a71ecca9ed593d9e9fa073ab64acfebe/Binary_Property
+var UNICODE = {
+    ID_Start: /[$A-Z_a-z\xAA\xB5\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0-\u08B4\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0AF9\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58-\u0C5A\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D5F-\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1380-\u138F\u13A0-\u13F5\u13F8-\u13FD\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u1A00-\u1A16\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2118-\u211D\u2124\u2126\u2128\u212A-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2160-\u2188\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303C\u3041-\u3096\u309B-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FD5\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA7AD\uA7B0-\uA7B7\uA7F7-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA8FD\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uA9E0-\uA9E4\uA9E6-\uA9EF\uA9FA-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB65\uAB70-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD40-\uDD74\uDE80-\uDE9C\uDEA0-\uDED0\uDF00-\uDF1F\uDF30-\uDF4A\uDF50-\uDF75\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC60-\uDC76\uDC80-\uDC9E\uDCE0-\uDCF2\uDCF4\uDCF5\uDD00-\uDD15\uDD20-\uDD39\uDD80-\uDDB7\uDDBE\uDDBF\uDE00\uDE10-\uDE13\uDE15-\uDE17\uDE19-\uDE33\uDE60-\uDE7C\uDE80-\uDE9C\uDEC0-\uDEC7\uDEC9-\uDEE4\uDF00-\uDF35\uDF40-\uDF55\uDF60-\uDF72\uDF80-\uDF91]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2]|\uD804[\uDC03-\uDC37\uDC83-\uDCAF\uDCD0-\uDCE8\uDD03-\uDD26\uDD50-\uDD72\uDD76\uDD83-\uDDB2\uDDC1-\uDDC4\uDDDA\uDDDC\uDE00-\uDE11\uDE13-\uDE2B\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEDE\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3D\uDF50\uDF5D-\uDF61]|\uD805[\uDC80-\uDCAF\uDCC4\uDCC5\uDCC7\uDD80-\uDDAE\uDDD8-\uDDDB\uDE00-\uDE2F\uDE44\uDE80-\uDEAA\uDF00-\uDF19]|\uD806[\uDCA0-\uDCDF\uDCFF\uDEC0-\uDEF8]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|[\uD80C\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDED0-\uDEED\uDF00-\uDF2F\uDF40-\uDF43\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDF00-\uDF44\uDF50\uDF93-\uDF9F]|\uD82C[\uDC00\uDC01]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB]|\uD83A[\uDC00-\uDCC4]|\uD83B[\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD869[\uDC00-\uDED6\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1]|\uD87E[\uDC00-\uDE1D]/,
+    ID_Continue: /(?:[$0-9A-Z_a-z\xAA\xB5\xB7\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0300-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u0483-\u0487\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u0591-\u05BD\u05BF\u05C1\u05C2\u05C4\u05C5\u05C7\u05D0-\u05EA\u05F0-\u05F2\u0610-\u061A\u0620-\u0669\u066E-\u06D3\u06D5-\u06DC\u06DF-\u06E8\u06EA-\u06FC\u06FF\u0710-\u074A\u074D-\u07B1\u07C0-\u07F5\u07FA\u0800-\u082D\u0840-\u085B\u08A0-\u08B4\u08E3-\u0963\u0966-\u096F\u0971-\u0983\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BC-\u09C4\u09C7\u09C8\u09CB-\u09CE\u09D7\u09DC\u09DD\u09DF-\u09E3\u09E6-\u09F1\u0A01-\u0A03\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A3C\u0A3E-\u0A42\u0A47\u0A48\u0A4B-\u0A4D\u0A51\u0A59-\u0A5C\u0A5E\u0A66-\u0A75\u0A81-\u0A83\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABC-\u0AC5\u0AC7-\u0AC9\u0ACB-\u0ACD\u0AD0\u0AE0-\u0AE3\u0AE6-\u0AEF\u0AF9\u0B01-\u0B03\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3C-\u0B44\u0B47\u0B48\u0B4B-\u0B4D\u0B56\u0B57\u0B5C\u0B5D\u0B5F-\u0B63\u0B66-\u0B6F\u0B71\u0B82\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BBE-\u0BC2\u0BC6-\u0BC8\u0BCA-\u0BCD\u0BD0\u0BD7\u0BE6-\u0BEF\u0C00-\u0C03\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D-\u0C44\u0C46-\u0C48\u0C4A-\u0C4D\u0C55\u0C56\u0C58-\u0C5A\u0C60-\u0C63\u0C66-\u0C6F\u0C81-\u0C83\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBC-\u0CC4\u0CC6-\u0CC8\u0CCA-\u0CCD\u0CD5\u0CD6\u0CDE\u0CE0-\u0CE3\u0CE6-\u0CEF\u0CF1\u0CF2\u0D01-\u0D03\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D-\u0D44\u0D46-\u0D48\u0D4A-\u0D4E\u0D57\u0D5F-\u0D63\u0D66-\u0D6F\u0D7A-\u0D7F\u0D82\u0D83\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DCA\u0DCF-\u0DD4\u0DD6\u0DD8-\u0DDF\u0DE6-\u0DEF\u0DF2\u0DF3\u0E01-\u0E3A\u0E40-\u0E4E\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB9\u0EBB-\u0EBD\u0EC0-\u0EC4\u0EC6\u0EC8-\u0ECD\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F18\u0F19\u0F20-\u0F29\u0F35\u0F37\u0F39\u0F3E-\u0F47\u0F49-\u0F6C\u0F71-\u0F84\u0F86-\u0F97\u0F99-\u0FBC\u0FC6\u1000-\u1049\u1050-\u109D\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u135D-\u135F\u1369-\u1371\u1380-\u138F\u13A0-\u13F5\u13F8-\u13FD\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1714\u1720-\u1734\u1740-\u1753\u1760-\u176C\u176E-\u1770\u1772\u1773\u1780-\u17D3\u17D7\u17DC\u17DD\u17E0-\u17E9\u180B-\u180D\u1810-\u1819\u1820-\u1877\u1880-\u18AA\u18B0-\u18F5\u1900-\u191E\u1920-\u192B\u1930-\u193B\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19DA\u1A00-\u1A1B\u1A20-\u1A5E\u1A60-\u1A7C\u1A7F-\u1A89\u1A90-\u1A99\u1AA7\u1AB0-\u1ABD\u1B00-\u1B4B\u1B50-\u1B59\u1B6B-\u1B73\u1B80-\u1BF3\u1C00-\u1C37\u1C40-\u1C49\u1C4D-\u1C7D\u1CD0-\u1CD2\u1CD4-\u1CF6\u1CF8\u1CF9\u1D00-\u1DF5\u1DFC-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u200C\u200D\u203F\u2040\u2054\u2071\u207F\u2090-\u209C\u20D0-\u20DC\u20E1\u20E5-\u20F0\u2102\u2107\u210A-\u2113\u2115\u2118-\u211D\u2124\u2126\u2128\u212A-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2160-\u2188\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D7F-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2DE0-\u2DFF\u3005-\u3007\u3021-\u302F\u3031-\u3035\u3038-\u303C\u3041-\u3096\u3099-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FD5\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66F\uA674-\uA67D\uA67F-\uA6F1\uA717-\uA71F\uA722-\uA788\uA78B-\uA7AD\uA7B0-\uA7B7\uA7F7-\uA827\uA840-\uA873\uA880-\uA8C4\uA8D0-\uA8D9\uA8E0-\uA8F7\uA8FB\uA8FD\uA900-\uA92D\uA930-\uA953\uA960-\uA97C\uA980-\uA9C0\uA9CF-\uA9D9\uA9E0-\uA9FE\uAA00-\uAA36\uAA40-\uAA4D\uAA50-\uAA59\uAA60-\uAA76\uAA7A-\uAAC2\uAADB-\uAADD\uAAE0-\uAAEF\uAAF2-\uAAF6\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB65\uAB70-\uABEA\uABEC\uABED\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE00-\uFE0F\uFE20-\uFE2F\uFE33\uFE34\uFE4D-\uFE4F\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF3F\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD40-\uDD74\uDDFD\uDE80-\uDE9C\uDEA0-\uDED0\uDEE0\uDF00-\uDF1F\uDF30-\uDF4A\uDF50-\uDF7A\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCA0-\uDCA9\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC60-\uDC76\uDC80-\uDC9E\uDCE0-\uDCF2\uDCF4\uDCF5\uDD00-\uDD15\uDD20-\uDD39\uDD80-\uDDB7\uDDBE\uDDBF\uDE00-\uDE03\uDE05\uDE06\uDE0C-\uDE13\uDE15-\uDE17\uDE19-\uDE33\uDE38-\uDE3A\uDE3F\uDE60-\uDE7C\uDE80-\uDE9C\uDEC0-\uDEC7\uDEC9-\uDEE6\uDF00-\uDF35\uDF40-\uDF55\uDF60-\uDF72\uDF80-\uDF91]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2]|\uD804[\uDC00-\uDC46\uDC66-\uDC6F\uDC7F-\uDCBA\uDCD0-\uDCE8\uDCF0-\uDCF9\uDD00-\uDD34\uDD36-\uDD3F\uDD50-\uDD73\uDD76\uDD80-\uDDC4\uDDCA-\uDDCC\uDDD0-\uDDDA\uDDDC\uDE00-\uDE11\uDE13-\uDE37\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEEA\uDEF0-\uDEF9\uDF00-\uDF03\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3C-\uDF44\uDF47\uDF48\uDF4B-\uDF4D\uDF50\uDF57\uDF5D-\uDF63\uDF66-\uDF6C\uDF70-\uDF74]|\uD805[\uDC80-\uDCC5\uDCC7\uDCD0-\uDCD9\uDD80-\uDDB5\uDDB8-\uDDC0\uDDD8-\uDDDD\uDE00-\uDE40\uDE44\uDE50-\uDE59\uDE80-\uDEB7\uDEC0-\uDEC9\uDF00-\uDF19\uDF1D-\uDF2B\uDF30-\uDF39]|\uD806[\uDCA0-\uDCE9\uDCFF\uDEC0-\uDEF8]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|[\uD80C\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE60-\uDE69\uDED0-\uDEED\uDEF0-\uDEF4\uDF00-\uDF36\uDF40-\uDF43\uDF50-\uDF59\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDF00-\uDF44\uDF50-\uDF7E\uDF8F-\uDF9F]|\uD82C[\uDC00\uDC01]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99\uDC9D\uDC9E]|\uD834[\uDD65-\uDD69\uDD6D-\uDD72\uDD7B-\uDD82\uDD85-\uDD8B\uDDAA-\uDDAD\uDE42-\uDE44]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB\uDFCE-\uDFFF]|\uD836[\uDE00-\uDE36\uDE3B-\uDE6C\uDE75\uDE84\uDE9B-\uDE9F\uDEA1-\uDEAF]|\uD83A[\uDC00-\uDCC4\uDCD0-\uDCD6]|\uD83B[\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD869[\uDC00-\uDED6\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1]|\uD87E[\uDC00-\uDE1D]|\uDB40[\uDD00-\uDDEF])+/,
+};
+
+function get_full_char(str, pos) {
+    if (is_surrogate_pair_head(str.charCodeAt(pos))) {
+        if (is_surrogate_pair_tail(str.charCodeAt(pos + 1))) {
+            return str.charAt(pos) + str.charAt(pos + 1);
+        }
+    } else if (is_surrogate_pair_tail(str.charCodeAt(pos))) {
+        if (is_surrogate_pair_head(str.charCodeAt(pos - 1))) {
+            return str.charAt(pos - 1) + str.charAt(pos);
+        }
+    }
+    return str.charAt(pos);
+}
+
+function get_full_char_code(str, pos) {
+    // https://en.wikipedia.org/wiki/Universal_Character_Set_characters#Surrogates
+    if (is_surrogate_pair_head(str.charCodeAt(pos))) {
+        return 0x10000 + (str.charCodeAt(pos) - 0xd800 << 10) + str.charCodeAt(pos + 1) - 0xdc00;
+    }
+    return str.charCodeAt(pos);
+}
+
+function get_full_char_length(str) {
+    var surrogates = 0;
+
+    for (var i = 0; i < str.length; i++) {
+        if (is_surrogate_pair_head(str.charCodeAt(i)) && is_surrogate_pair_tail(str.charCodeAt(i + 1))) {
+            surrogates++;
+            i++;
+        }
+    }
+
+    return str.length - surrogates;
+}
+
+function from_char_code(code) {
+    // Based on https://github.com/mathiasbynens/String.fromCodePoint/blob/master/fromcodepoint.js
+    if (code > 0xFFFF) {
+        code -= 0x10000;
+        return (String.fromCharCode((code >> 10) + 0xD800) +
+            String.fromCharCode((code % 0x400) + 0xDC00));
+    }
+    return String.fromCharCode(code);
+}
+
+function is_surrogate_pair_head(code) {
+    return code >= 0xd800 && code <= 0xdbff;
+}
+
+function is_surrogate_pair_tail(code) {
+    return code >= 0xdc00 && code <= 0xdfff;
+}
+
+function is_digit(code) {
+    return code >= 48 && code <= 57;
+}
+
+function is_identifier_start(ch) {
+    return UNICODE.ID_Start.test(ch);
+}
+
+function is_identifier_char(ch) {
+    return UNICODE.ID_Continue.test(ch);
+}
+
+const BASIC_IDENT = /^[a-z_$][a-z0-9_$]*$/i;
+
+function is_basic_identifier_string(str) {
+    return BASIC_IDENT.test(str);
+}
+
+function is_identifier_string(str, allow_surrogates) {
+    if (BASIC_IDENT.test(str)) {
+        return true;
+    }
+    if (!allow_surrogates && /[\ud800-\udfff]/.test(str)) {
+        return false;
+    }
+    var match = UNICODE.ID_Start.exec(str);
+    if (!match || match.index !== 0) {
+        return false;
+    }
+
+    str = str.slice(match[0].length);
+    if (!str) {
+        return true;
+    }
+
+    match = UNICODE.ID_Continue.exec(str);
+    return !!match && match[0].length === str.length;
+}
+
+function parse_js_number(num, allow_e = true) {
+    if (!allow_e && num.includes("e")) {
+        return NaN;
+    }
+    if (RE_HEX_NUMBER.test(num)) {
+        return parseInt(num.substr(2), 16);
+    } else if (RE_OCT_NUMBER.test(num)) {
+        return parseInt(num.substr(1), 8);
+    } else if (RE_ES6_OCT_NUMBER.test(num)) {
+        return parseInt(num.substr(2), 8);
+    } else if (RE_BIN_NUMBER.test(num)) {
+        return parseInt(num.substr(2), 2);
+    } else if (RE_DEC_NUMBER.test(num)) {
+        return parseFloat(num);
+    } else {
+        var val = parseFloat(num);
+        if (val == num) return val;
+    }
+}
+
+class JS_Parse_Error extends Error {
+    constructor(message, filename, line, col, pos) {
+        super();
+
+        this.name = "SyntaxError";
+        this.message = message;
+        this.filename = filename;
+        this.line = line;
+        this.col = col;
+        this.pos = pos;
+    }
+}
+
+function js_error(message, filename, line, col, pos) {
+    throw new JS_Parse_Error(message, filename, line, col, pos);
+}
+
+function is_token(token, type, val) {
+    return token.type == type && (val == null || token.value == val);
+}
+
+var EX_EOF = {};
+
+function tokenizer($TEXT, filename, html5_comments, shebang) {
+    var S = {
+        text            : $TEXT,
+        filename        : filename,
+        pos             : 0,
+        tokpos          : 0,
+        line            : 1,
+        tokline         : 0,
+        col             : 0,
+        tokcol          : 0,
+        newline_before  : false,
+        regex_allowed   : false,
+        brace_counter   : 0,
+        template_braces : [],
+        comments_before : [],
+        directives      : {},
+        directive_stack : []
+    };
+
+    function peek() { return get_full_char(S.text, S.pos); }
+
+    // Used because parsing ?. involves a lookahead for a digit
+    function is_option_chain_op() {
+        const must_be_dot = S.text.charCodeAt(S.pos + 1) === 46;
+        if (!must_be_dot) return false;
+
+        const cannot_be_digit = S.text.charCodeAt(S.pos + 2);
+        return cannot_be_digit < 48 || cannot_be_digit > 57;
+    }
+
+    function next(signal_eof, in_string) {
+        var ch = get_full_char(S.text, S.pos++);
+        if (signal_eof && !ch)
+            throw EX_EOF;
+        if (NEWLINE_CHARS.has(ch)) {
+            S.newline_before = S.newline_before || !in_string;
+            ++S.line;
+            S.col = 0;
+            if (ch == "\r" && peek() == "\n") {
+                // treat a \r\n sequence as a single \n
+                ++S.pos;
+                ch = "\n";
+            }
+        } else {
+            if (ch.length > 1) {
+                ++S.pos;
+                ++S.col;
+            }
+            ++S.col;
+        }
+        return ch;
+    }
+
+    function forward(i) {
+        while (i--) next();
+    }
+
+    function looking_at(str) {
+        return S.text.substr(S.pos, str.length) == str;
+    }
+
+    function find_eol() {
+        var text = S.text;
+        for (var i = S.pos, n = S.text.length; i < n; ++i) {
+            var ch = text[i];
+            if (NEWLINE_CHARS.has(ch))
+                return i;
+        }
+        return -1;
+    }
+
+    function find(what, signal_eof) {
+        var pos = S.text.indexOf(what, S.pos);
+        if (signal_eof && pos == -1) throw EX_EOF;
+        return pos;
+    }
+
+    function start_token() {
+        S.tokline = S.line;
+        S.tokcol = S.col;
+        S.tokpos = S.pos;
+    }
+
+    var prev_was_dot = false;
+    var previous_token = null;
+    function token(type, value, is_comment) {
+        S.regex_allowed = ((type == "operator" && !UNARY_POSTFIX.has(value)) ||
+                           (type == "keyword" && KEYWORDS_BEFORE_EXPRESSION.has(value)) ||
+                           (type == "punc" && PUNC_BEFORE_EXPRESSION.has(value))) ||
+                           (type == "arrow");
+        if (type == "punc" && (value == "." || value == "?.")) {
+            prev_was_dot = true;
+        } else if (!is_comment) {
+            prev_was_dot = false;
+        }
+        const line     = S.tokline;
+        const col      = S.tokcol;
+        const pos      = S.tokpos;
+        const nlb      = S.newline_before;
+        const file     = filename;
+        let comments_before = [];
+        let comments_after  = [];
+
+        if (!is_comment) {
+            comments_before = S.comments_before;
+            comments_after = S.comments_before = [];
+        }
+        S.newline_before = false;
+        const tok = new AST_Token(type, value, line, col, pos, nlb, comments_before, comments_after, file);
+
+        if (!is_comment) previous_token = tok;
+        return tok;
+    }
+
+    function skip_whitespace() {
+        while (WHITESPACE_CHARS.has(peek()))
+            next();
+    }
+
+    function peek_next_token_start_or_newline() {
+        var pos = S.pos;
+        for (var in_multiline_comment = false; pos < S.text.length; ) {
+            var ch = get_full_char(S.text, pos);
+            if (NEWLINE_CHARS.has(ch)) {
+                return { char: ch, pos: pos };
+            } else if (in_multiline_comment) {
+                if (ch == "*" && get_full_char(S.text, pos + 1) == "/") {
+                    pos += 2;
+                    in_multiline_comment = false;
+                } else {
+                    pos++;
+                }
+            } else if (!WHITESPACE_CHARS.has(ch)) {
+                if (ch == "/") {
+                    var next_ch = get_full_char(S.text, pos + 1);
+                    if (next_ch == "/") {
+                        pos = find_eol();
+                        return { char: get_full_char(S.text, pos), pos: pos };
+                    } else if (next_ch == "*") {
+                        in_multiline_comment = true;
+                        pos += 2;
+                        continue;
+                    }
+                }
+                return { char: ch, pos: pos };
+            } else {
+                pos++;
+            }
+        }
+        return { char: null, pos: pos };
+    }
+
+    function ch_starts_binding_identifier(ch, pos) {
+        if (ch == "\\") {
+            return true;
+        } else if (is_identifier_start(ch)) {
+            RE_KEYWORD_RELATIONAL_OPERATORS.lastIndex = pos;
+            if (RE_KEYWORD_RELATIONAL_OPERATORS.test(S.text)) {
+                var after = get_full_char(S.text, RE_KEYWORD_RELATIONAL_OPERATORS.lastIndex);
+                if (!is_identifier_char(after) && after != "\\") {
+                    // "in" or "instanceof" are keywords, not binding identifiers
+                    return false; 
+                }
+            }
+            return true;
+        }
+        return false;
+    }
+
+    function read_while(pred) {
+        var ret = "", ch, i = 0;
+        while ((ch = peek()) && pred(ch, i++))
+            ret += next();
+        return ret;
+    }
+
+    function parse_error(err) {
+        js_error(err, filename, S.tokline, S.tokcol, S.tokpos);
+    }
+
+    function read_num(prefix) {
+        var has_e = false, after_e = false, has_x = false, has_dot = prefix == ".", is_big_int = false, numeric_separator = false;
+        var num = read_while(function(ch, i) {
+            if (is_big_int) return false;
+
+            var code = ch.charCodeAt(0);
+            switch (code) {
+              case 95: // _
+                return (numeric_separator = true);
+              case 98: case 66: // bB
+                return (has_x = true); // Can occur in hex sequence, don't return false yet
+              case 111: case 79: // oO
+              case 120: case 88: // xX
+                return has_x ? false : (has_x = true);
+              case 101: case 69: // eE
+                return has_x ? true : has_e ? false : (has_e = after_e = true);
+              case 45: // -
+                return after_e || (i == 0 && !prefix);
+              case 43: // +
+                return after_e;
+              case (after_e = false, 46): // .
+                return (!has_dot && !has_x && !has_e) ? (has_dot = true) : false;
+              case 110: // n
+                is_big_int = true;
+                return true;
+            }
+
+            return (
+                code >= 48 && code <= 57 // 0-9
+                || code >= 97 && code <= 102 // a-f
+                || code >= 65 && code <= 70 // A-F
+            );
+        });
+        if (prefix) num = prefix + num;
+
+        LATEST_RAW = num;
+
+        if (RE_OCT_NUMBER.test(num) && next_token.has_directive("use strict")) {
+            parse_error("Legacy octal literals are not allowed in strict mode");
+        }
+        if (numeric_separator) {
+            if (num.endsWith("_")) {
+                parse_error("Numeric separators are not allowed at the end of numeric literals");
+            } else if (num.includes("__")) {
+                parse_error("Only one underscore is allowed as numeric separator");
+            }
+            num = num.replace(/_/g, "");
+        }
+        if (is_big_int) {
+            const without_n = num.slice(0, -1);
+            const allow_e = RE_HEX_NUMBER.test(without_n);
+            const valid = parse_js_number(without_n, allow_e);
+            if (!has_dot && RE_BIG_INT.test(num) && !isNaN(valid))
+                return token("big_int", without_n);
+            parse_error("Invalid or unexpected token");
+        }
+        var valid = parse_js_number(num);
+        if (!isNaN(valid)) {
+            return token("num", valid);
+        } else {
+            parse_error("Invalid syntax: " + num);
+        }
+    }
+
+    function is_octal(ch) {
+        return ch >= "0" && ch <= "7";
+    }
+
+    function read_escaped_char(in_string, strict_hex, template_string) {
+        var ch = next(true, in_string);
+        switch (ch.charCodeAt(0)) {
+          case 110 : return "\n";
+          case 114 : return "\r";
+          case 116 : return "\t";
+          case 98  : return "\b";
+          case 118 : return "\u000b"; // \v
+          case 102 : return "\f";
+          case 120 : return String.fromCharCode(hex_bytes(2, strict_hex)); // \x
+          case 117 : // \u
+            if (peek() == "{") {
+                next(true);
+                if (peek() === "}")
+                    parse_error("Expecting hex-character between {}");
+                while (peek() == "0") next(true); // No significance
+                var result, length = find("}", true) - S.pos;
+                // Avoid 32 bit integer overflow (1 << 32 === 1)
+                // We know first character isn't 0 and thus out of range anyway
+                if (length > 6 || (result = hex_bytes(length, strict_hex)) > 0x10FFFF) {
+                    parse_error("Unicode reference out of bounds");
+                }
+                next(true);
+                return from_char_code(result);
+            }
+            return String.fromCharCode(hex_bytes(4, strict_hex));
+          case 10  : return ""; // newline
+          case 13  :            // \r
+            if (peek() == "\n") { // DOS newline
+                next(true, in_string);
+                return "";
+            }
+        }
+        if (is_octal(ch)) {
+            if (template_string && strict_hex) {
+                const represents_null_character = ch === "0" && !is_octal(peek());
+                if (!represents_null_character) {
+                    parse_error("Octal escape sequences are not allowed in template strings");
+                }
+            }
+            return read_octal_escape_sequence(ch, strict_hex);
+        }
+        return ch;
+    }
+
+    function read_octal_escape_sequence(ch, strict_octal) {
+        // Read
+        var p = peek();
+        if (p >= "0" && p <= "7") {
+            ch += next(true);
+            if (ch[0] <= "3" && (p = peek()) >= "0" && p <= "7")
+                ch += next(true);
+        }
+
+        // Parse
+        if (ch === "0") return "\0";
+        if (ch.length > 0 && next_token.has_directive("use strict") && strict_octal)
+            parse_error("Legacy octal escape sequences are not allowed in strict mode");
+        return String.fromCharCode(parseInt(ch, 8));
+    }
+
+    function hex_bytes(n, strict_hex) {
+        var num = 0;
+        for (; n > 0; --n) {
+            if (!strict_hex && isNaN(parseInt(peek(), 16))) {
+                return parseInt(num, 16) || "";
+            }
+            var digit = next(true);
+            if (isNaN(parseInt(digit, 16)))
+                parse_error("Invalid hex-character pattern in string");
+            num += digit;
+        }
+        return parseInt(num, 16);
+    }
+
+    var read_string = with_eof_error("Unterminated string constant", function() {
+        const start_pos = S.pos;
+        var quote = next(), ret = [];
+        for (;;) {
+            var ch = next(true, true);
+            if (ch == "\\") ch = read_escaped_char(true, true);
+            else if (ch == "\r" || ch == "\n") parse_error("Unterminated string constant");
+            else if (ch == quote) break;
+            ret.push(ch);
+        }
+        var tok = token("string", ret.join(""));
+        LATEST_RAW = S.text.slice(start_pos, S.pos);
+        tok.quote = quote;
+        return tok;
+    });
+
+    var read_template_characters = with_eof_error("Unterminated template", function(begin) {
+        if (begin) {
+            S.template_braces.push(S.brace_counter);
+        }
+        var content = "", raw = "", ch, tok;
+        next(true, true);
+        while ((ch = next(true, true)) != "`") {
+            if (ch == "\r") {
+                if (peek() == "\n") ++S.pos;
+                ch = "\n";
+            } else if (ch == "$" && peek() == "{") {
+                next(true, true);
+                S.brace_counter++;
+                tok = token(begin ? "template_head" : "template_cont", content);
+                TEMPLATE_RAWS.set(tok, raw);
+                tok.template_end = false;
+                return tok;
+            }
+
+            raw += ch;
+            if (ch == "\\") {
+                var tmp = S.pos;
+                var prev_is_tag = previous_token && (previous_token.type === "name" || previous_token.type === "punc" && (previous_token.value === ")" || previous_token.value === "]"));
+                ch = read_escaped_char(true, !prev_is_tag, true);
+                raw += S.text.substr(tmp, S.pos - tmp);
+            }
+
+            content += ch;
+        }
+        S.template_braces.pop();
+        tok = token(begin ? "template_head" : "template_cont", content);
+        TEMPLATE_RAWS.set(tok, raw);
+        tok.template_end = true;
+        return tok;
+    });
+
+    function skip_line_comment(type) {
+        var regex_allowed = S.regex_allowed;
+        var i = find_eol(), ret;
+        if (i == -1) {
+            ret = S.text.substr(S.pos);
+            S.pos = S.text.length;
+        } else {
+            ret = S.text.substring(S.pos, i);
+            S.pos = i;
+        }
+        S.col = S.tokcol + (S.pos - S.tokpos);
+        S.comments_before.push(token(type, ret, true));
+        S.regex_allowed = regex_allowed;
+        return next_token;
+    }
+
+    var skip_multiline_comment = with_eof_error("Unterminated multiline comment", function() {
+        var regex_allowed = S.regex_allowed;
+        var i = find("*/", true);
+        var text = S.text.substring(S.pos, i).replace(/\r\n|\r|\u2028|\u2029/g, "\n");
+        // update stream position
+        forward(get_full_char_length(text) /* text length doesn't count \r\n as 2 char while S.pos - i does */ + 2);
+        S.comments_before.push(token("comment2", text, true));
+        S.newline_before = S.newline_before || text.includes("\n");
+        S.regex_allowed = regex_allowed;
+        return next_token;
+    });
+
+    var read_name = function () {
+        let start = S.pos, end = start - 1, ch = "c";
+
+        while (
+            (ch = S.text.charAt(++end))
+            && (ch >= "a" && ch <= "z" || ch >= "A" && ch <= "Z")
+        );
+
+        // 0x7F is very rare in actual code, so we compare it to "~" (0x7E)
+        if (end > start + 1 && ch && ch !== "\\" && !is_identifier_char(ch) && ch <= "~") {
+            S.pos += end - start;
+            S.col += end - start;
+            return S.text.slice(start, S.pos);
+        }
+
+        return read_name_hard();
+    };
+
+    var read_name_hard = with_eof_error("Unterminated identifier name", function() {
+        var name = [], ch, escaped = false;
+        var read_escaped_identifier_char = function() {
+            escaped = true;
+            next();
+            if (peek() !== "u") {
+                parse_error("Expecting UnicodeEscapeSequence -- uXXXX or u{XXXX}");
+            }
+            return read_escaped_char(false, true);
+        };
+
+        // Read first character (ID_Start)
+        if ((ch = peek()) === "\\") {
+            ch = read_escaped_identifier_char();
+            if (!is_identifier_start(ch)) {
+                parse_error("First identifier char is an invalid identifier char");
+            }
+        } else if (is_identifier_start(ch)) {
+            next();
+        } else {
+            return "";
+        }
+
+        name.push(ch);
+
+        // Read ID_Continue
+        while ((ch = peek()) != null) {
+            if ((ch = peek()) === "\\") {
+                ch = read_escaped_identifier_char();
+                if (!is_identifier_char(ch)) {
+                    parse_error("Invalid escaped identifier char");
+                }
+            } else {
+                if (!is_identifier_char(ch)) {
+                    break;
+                }
+                next();
+            }
+            name.push(ch);
+        }
+        const name_str = name.join("");
+        if (RESERVED_WORDS.has(name_str) && escaped) {
+            parse_error("Escaped characters are not allowed in keywords");
+        }
+        return name_str;
+    });
+
+    var read_regexp = with_eof_error("Unterminated regular expression", function(source) {
+        var prev_backslash = false, ch, in_class = false;
+        while ((ch = next(true))) if (NEWLINE_CHARS.has(ch)) {
+            parse_error("Unexpected line terminator");
+        } else if (prev_backslash) {
+            if (/^[\u0000-\u007F]$/.test(ch)) {
+                source += "\\" + ch;
+            } else {
+                // Remove the useless slash before the escape, but only for characters that won't be added to regexp syntax
+                source += ch;
+            }
+            prev_backslash = false;
+        } else if (ch == "[") {
+            in_class = true;
+            source += ch;
+        } else if (ch == "]" && in_class) {
+            in_class = false;
+            source += ch;
+        } else if (ch == "/" && !in_class) {
+            break;
+        } else if (ch == "\\") {
+            prev_backslash = true;
+        } else {
+            source += ch;
+        }
+        const flags = read_name();
+        return token("regexp", "/" + source + "/" + flags);
+    });
+
+    function read_operator(prefix) {
+        function grow(op) {
+            if (!peek()) return op;
+            var bigger = op + peek();
+            if (OPERATORS.has(bigger)) {
+                next();
+                return grow(bigger);
+            } else {
+                return op;
+            }
+        }
+        return token("operator", grow(prefix || next()));
+    }
+
+    function handle_slash() {
+        next();
+        switch (peek()) {
+          case "/":
+            next();
+            return skip_line_comment("comment1");
+          case "*":
+            next();
+            return skip_multiline_comment();
+        }
+        return S.regex_allowed ? read_regexp("") : read_operator("/");
+    }
+
+    function handle_eq_sign() {
+        next();
+        if (peek() === ">") {
+            next();
+            return token("arrow", "=>");
+        } else {
+            return read_operator("=");
+        }
+    }
+
+    function handle_dot() {
+        next();
+        if (is_digit(peek().charCodeAt(0))) {
+            return read_num(".");
+        }
+        if (peek() === ".") {
+            next();  // Consume second dot
+            next();  // Consume third dot
+            return token("expand", "...");
+        }
+
+        return token("punc", ".");
+    }
+
+    function read_word() {
+        var word = read_name();
+        if (prev_was_dot) return token("name", word);
+        return KEYWORDS_ATOM.has(word) ? token("atom", word)
+            : !KEYWORDS.has(word) ? token("name", word)
+            : OPERATORS.has(word) ? token("operator", word)
+            : token("keyword", word);
+    }
+
+    function read_private_word() {
+        next();
+        return token("privatename", read_name());
+    }
+
+    function with_eof_error(eof_error, cont) {
+        return function(x) {
+            try {
+                return cont(x);
+            } catch(ex) {
+                if (ex === EX_EOF) parse_error(eof_error);
+                else throw ex;
+            }
+        };
+    }
+
+    function next_token(force_regexp) {
+        if (force_regexp != null)
+            return read_regexp(force_regexp);
+        if (shebang && S.pos == 0 && looking_at("#!")) {
+            start_token();
+            forward(2);
+            skip_line_comment("comment5");
+        }
+        for (;;) {
+            skip_whitespace();
+            start_token();
+            if (html5_comments) {
+                if (looking_at("<!--")) {
+                    forward(4);
+                    skip_line_comment("comment3");
+                    continue;
+                }
+                if (looking_at("-->") && S.newline_before) {
+                    forward(3);
+                    skip_line_comment("comment4");
+                    continue;
+                }
+            }
+            var ch = peek();
+            if (!ch) return token("eof");
+            var code = ch.charCodeAt(0);
+            switch (code) {
+              case 34: case 39: return read_string();
+              case 46: return handle_dot();
+              case 47: {
+                  var tok = handle_slash();
+                  if (tok === next_token) continue;
+                  return tok;
+              }
+              case 61: return handle_eq_sign();
+              case 63: {
+                  if (!is_option_chain_op()) break;  // Handled below
+
+                  next(); // ?
+                  next(); // .
+
+                  return token("punc", "?.");
+              }
+              case 96: return read_template_characters(true);
+              case 123:
+                S.brace_counter++;
+                break;
+              case 125:
+                S.brace_counter--;
+                if (S.template_braces.length > 0
+                    && S.template_braces[S.template_braces.length - 1] === S.brace_counter)
+                    return read_template_characters(false);
+                break;
+            }
+            if (is_digit(code)) return read_num();
+            if (PUNC_CHARS.has(ch)) return token("punc", next());
+            if (OPERATOR_CHARS.has(ch)) return read_operator();
+            if (code == 92 || is_identifier_start(ch)) return read_word();
+            if (code == 35) return read_private_word();
+            break;
+        }
+        parse_error("Unexpected character '" + ch + "'");
+    }
+
+    next_token.next = next;
+    next_token.peek = peek;
+
+    next_token.context = function(nc) {
+        if (nc) S = nc;
+        return S;
+    };
+
+    next_token.add_directive = function(directive) {
+        S.directive_stack[S.directive_stack.length - 1].push(directive);
+
+        if (S.directives[directive] === undefined) {
+            S.directives[directive] = 1;
+        } else {
+            S.directives[directive]++;
+        }
+    };
+
+    next_token.push_directives_stack = function() {
+        S.directive_stack.push([]);
+    };
+
+    next_token.pop_directives_stack = function() {
+        var directives = S.directive_stack[S.directive_stack.length - 1];
+
+        for (var i = 0; i < directives.length; i++) {
+            S.directives[directives[i]]--;
+        }
+
+        S.directive_stack.pop();
+    };
+
+    next_token.has_directive = function(directive) {
+        return S.directives[directive] > 0;
+    };
+
+    next_token.peek_next_token_start_or_newline = peek_next_token_start_or_newline;
+    next_token.ch_starts_binding_identifier = ch_starts_binding_identifier;
+
+    return next_token;
+
+}
+
+/* -----[ Parser (constants) ]----- */
+
+var UNARY_PREFIX = makePredicate([
+    "typeof",
+    "void",
+    "delete",
+    "--",
+    "++",
+    "!",
+    "~",
+    "-",
+    "+"
+]);
+
+var UNARY_POSTFIX = makePredicate([ "--", "++" ]);
+
+var ASSIGNMENT = makePredicate([ "=", "+=", "-=", "??=", "&&=", "||=", "/=", "*=", "**=", "%=", ">>=", "<<=", ">>>=", "|=", "^=", "&=" ]);
+
+var LOGICAL_ASSIGNMENT = makePredicate([ "??=", "&&=", "||=" ]);
+
+var PRECEDENCE = (function(a, ret) {
+    for (var i = 0; i < a.length; ++i) {
+        for (const op of a[i]) {
+            ret[op] = i + 1;
+        }
+    }
+    return ret;
+})(
+    [
+        ["||"],
+        ["??"],
+        ["&&"],
+        ["|"],
+        ["^"],
+        ["&"],
+        ["==", "===", "!=", "!=="],
+        ["<", ">", "<=", ">=", "in", "instanceof"],
+        [">>", "<<", ">>>"],
+        ["+", "-"],
+        ["*", "/", "%"],
+        ["**"]
+    ],
+    {}
+);
+
+var ATOMIC_START_TOKEN = makePredicate([ "atom", "num", "big_int", "string", "regexp", "name"]);
+
+/* -----[ Parser ]----- */
+
+function parse($TEXT, options) {
+    // maps start tokens to count of comments found outside of their parens
+    // Example: /* I count */ ( /* I don't */ foo() )
+    // Useful because comments_before property of call with parens outside
+    // contains both comments inside and outside these parens. Used to find the
+    
+    const outer_comments_before_counts = new WeakMap();
+
+    options = defaults(options, {
+        bare_returns   : false,
+        ecma           : null,  // Legacy
+        expression     : false,
+        filename       : null,
+        html5_comments : true,
+        module         : false,
+        shebang        : true,
+        strict         : false,
+        toplevel       : null,
+    }, true);
+
+    var S = {
+        input         : (typeof $TEXT == "string"
+                         ? tokenizer($TEXT, options.filename,
+                                     options.html5_comments, options.shebang)
+                         : $TEXT),
+        token         : null,
+        prev          : null,
+        peeked        : null,
+        in_function   : 0,
+        in_async      : -1,
+        in_generator  : -1,
+        in_directives : true,
+        in_loop       : 0,
+        labels        : []
+    };
+
+    S.token = next();
+
+    function is(type, value) {
+        return is_token(S.token, type, value);
+    }
+
+    function peek() { return S.peeked || (S.peeked = S.input()); }
+
+    function next() {
+        S.prev = S.token;
+
+        if (!S.peeked) peek();
+        S.token = S.peeked;
+        S.peeked = null;
+        S.in_directives = S.in_directives && (
+            S.token.type == "string" || is("punc", ";")
+        );
+        return S.token;
+    }
+
+    function prev() {
+        return S.prev;
+    }
+
+    function croak(msg, line, col, pos) {
+        var ctx = S.input.context();
+        js_error(msg,
+                 ctx.filename,
+                 line != null ? line : ctx.tokline,
+                 col != null ? col : ctx.tokcol,
+                 pos != null ? pos : ctx.tokpos);
+    }
+
+    function token_error(token, msg) {
+        croak(msg, token.line, token.col);
+    }
+
+    function unexpected(token) {
+        if (token == null)
+            token = S.token;
+        token_error(token, "Unexpected token: " + token.type + " (" + token.value + ")");
+    }
+
+    function expect_token(type, val) {
+        if (is(type, val)) {
+            return next();
+        }
+        token_error(S.token, "Unexpected token " + S.token.type + " «" + S.token.value + "»" + ", expected " + type + " «" + val + "»");
+    }
+
+    function expect(punc) { return expect_token("punc", punc); }
+
+    function has_newline_before(token) {
+        return token.nlb || !token.comments_before.every((comment) => !comment.nlb);
+    }
+
+    function can_insert_semicolon() {
+        return !options.strict
+            && (is("eof") || is("punc", "}") || has_newline_before(S.token));
+    }
+
+    function is_in_generator() {
+        return S.in_generator === S.in_function;
+    }
+
+    function is_in_async() {
+        return S.in_async === S.in_function;
+    }
+
+    function can_await() {
+        return (
+            S.in_async === S.in_function
+            || S.in_function === 0 && S.input.has_directive("use strict")
+        );
+    }
+
+    function semicolon(optional) {
+        if (is("punc", ";")) next();
+        else if (!optional && !can_insert_semicolon()) unexpected();
+    }
+
+    function parenthesised() {
+        expect("(");
+        var exp = expression(true);
+        expect(")");
+        return exp;
+    }
+
+    function embed_tokens(parser) {
+        return function _embed_tokens_wrapper(...args) {
+            const start = S.token;
+            const expr = parser(...args);
+            expr.start = start;
+            expr.end = prev();
+            return expr;
+        };
+    }
+
+    function handle_regexp() {
+        if (is("operator", "/") || is("operator", "/=")) {
+            S.peeked = null;
+            S.token = S.input(S.token.value.substr(1)); // force regexp
+        }
+    }
+
+    var statement = embed_tokens(function statement(is_export_default, is_for_body, is_if_body) {
+        handle_regexp();
+        switch (S.token.type) {
+          case "string":
+            if (S.in_directives) {
+                var token = peek();
+                if (!LATEST_RAW.includes("\\")
+                    && (is_token(token, "punc", ";")
+                        || is_token(token, "punc", "}")
+                        || has_newline_before(token)
+                        || is_token(token, "eof"))) {
+                    S.input.add_directive(S.token.value);
+                } else {
+                    S.in_directives = false;
+                }
+            }
+            var dir = S.in_directives, stat = simple_statement();
+            return dir && stat.body instanceof AST_String ? new AST_Directive(stat.body) : stat;
+          case "template_head":
+          case "num":
+          case "big_int":
+          case "regexp":
+          case "operator":
+          case "atom":
+            return simple_statement();
+
+          case "name":
+            if (S.token.value == "async" && is_token(peek(), "keyword", "function")) {
+                next();
+                next();
+                if (is_for_body) {
+                    croak("functions are not allowed as the body of a loop");
+                }
+                return function_(AST_Defun, false, true, is_export_default);
+            }
+            if (S.token.value == "import" && !is_token(peek(), "punc", "(") && !is_token(peek(), "punc", ".")) {
+                next();
+                var node = import_statement();
+                semicolon();
+                return node;
+            }
+            if (S.token.value == "using" && is_token(peek(), "name") && !has_newline_before(peek())) {
+                next();
+                var node = using_();
+                semicolon();
+                return node;
+            }
+            if (S.token.value == "await" && can_await() && is_token(peek(), "name", "using") && !has_newline_before(peek())) {
+                var next_next = S.input.peek_next_token_start_or_newline();
+                if (S.input.ch_starts_binding_identifier(next_next.char, next_next.pos)) {
+                    next();
+                    // The "using" token will be consumed by the await_using_ function.
+                    var node = await_using_();
+                    semicolon();
+                    return node;
+                }
+            }
+            return is_token(peek(), "punc", ":")
+                ? labeled_statement()
+                : simple_statement();
+
+          case "privatename":
+            if(!S.in_class)
+              croak("Private field must be used in an enclosing class");
+            return simple_statement();
+
+          case "punc":
+            switch (S.token.value) {
+              case "{":
+                return new AST_BlockStatement({
+                    start : S.token,
+                    body  : block_(),
+                    end   : prev()
+                });
+              case "[":
+              case "(":
+                return simple_statement();
+              case ";":
+                S.in_directives = false;
+                next();
+                return new AST_EmptyStatement();
+              default:
+                unexpected();
+            }
+
+          case "keyword":
+            switch (S.token.value) {
+              case "break":
+                next();
+                return break_cont(AST_Break);
+
+              case "continue":
+                next();
+                return break_cont(AST_Continue);
+
+              case "debugger":
+                next();
+                semicolon();
+                return new AST_Debugger();
+
+              case "do":
+                next();
+                var body = in_loop(statement);
+                expect_token("keyword", "while");
+                var condition = parenthesised();
+                semicolon(true);
+                return new AST_Do({
+                    body      : body,
+                    condition : condition
+                });
+
+              case "while":
+                next();
+                return new AST_While({
+                    condition : parenthesised(),
+                    body      : in_loop(function() { return statement(false, true); })
+                });
+
+              case "for":
+                next();
+                return for_();
+
+              case "class":
+                next();
+                if (is_for_body) {
+                    croak("classes are not allowed as the body of a loop");
+                }
+                if (is_if_body) {
+                    croak("classes are not allowed as the body of an if");
+                }
+                return class_(AST_DefClass, is_export_default);
+
+              case "function":
+                next();
+                if (is_for_body) {
+                    croak("functions are not allowed as the body of a loop");
+                }
+                return function_(AST_Defun, false, false, is_export_default);
+
+              case "if":
+                next();
+                return if_();
+
+              case "return":
+                if (S.in_function == 0 && !options.bare_returns)
+                    croak("'return' outside of function");
+                next();
+                var value = null;
+                if (is("punc", ";")) {
+                    next();
+                } else if (!can_insert_semicolon()) {
+                    value = expression(true);
+                    semicolon();
+                }
+                return new AST_Return({
+                    value: value
+                });
+
+              case "switch":
+                next();
+                return new AST_Switch({
+                    expression : parenthesised(),
+                    body       : in_loop(switch_body_)
+                });
+
+              case "throw":
+                next();
+                if (has_newline_before(S.token))
+                    croak("Illegal newline after 'throw'");
+                var value = expression(true);
+                semicolon();
+                return new AST_Throw({
+                    value: value
+                });
+
+              case "try":
+                next();
+                return try_();
+
+              case "var":
+                next();
+                var node = var_();
+                semicolon();
+                return node;
+
+              case "let":
+                next();
+                var node = let_();
+                semicolon();
+                return node;
+
+              case "const":
+                next();
+                var node = const_();
+                semicolon();
+                return node;
+
+              case "with":
+                if (S.input.has_directive("use strict")) {
+                    croak("Strict mode may not include a with statement");
+                }
+                next();
+                return new AST_With({
+                    expression : parenthesised(),
+                    body       : statement()
+                });
+
+              case "export":
+                if (!is_token(peek(), "punc", "(")) {
+                    next();
+                    var node = export_statement();
+                    if (is("punc", ";")) semicolon();
+                    return node;
+                }
+            }
+        }
+        unexpected();
+    });
+
+    function labeled_statement() {
+        var label = as_symbol(AST_Label);
+        if (label.name === "await" && is_in_async()) {
+            token_error(S.prev, "await cannot be used as label inside async function");
+        }
+        if (S.labels.some((l) => l.name === label.name)) {
+            // ECMA-262, 12.12: An ECMAScript program is considered
+            // syntactically incorrect if it contains a
+            // LabelledStatement that is enclosed by a
+            // LabelledStatement with the same Identifier as label.
+            croak("Label " + label.name + " defined twice");
+        }
+        expect(":");
+        S.labels.push(label);
+        var stat = statement();
+        S.labels.pop();
+        if (!(stat instanceof AST_IterationStatement)) {
+            // check for `continue` that refers to this label.
+            // those should be reported as syntax errors.
+            // https://github.com/mishoo/UglifyJS2/issues/287
+            label.references.forEach(function(ref) {
+                if (ref instanceof AST_Continue) {
+                    ref = ref.label.start;
+                    croak("Continue label `" + label.name + "` refers to non-IterationStatement.",
+                          ref.line, ref.col, ref.pos);
+                }
+            });
+        }
+        return new AST_LabeledStatement({ body: stat, label: label });
+    }
+
+    function simple_statement(tmp) {
+        return new AST_SimpleStatement({ body: (tmp = expression(true), semicolon(), tmp) });
+    }
+
+    function break_cont(type) {
+        var label = null, ldef;
+        if (!can_insert_semicolon()) {
+            label = as_symbol(AST_LabelRef, true);
+        }
+        if (label != null) {
+            ldef = S.labels.find((l) => l.name === label.name);
+            if (!ldef)
+                croak("Undefined label " + label.name);
+            label.thedef = ldef;
+        } else if (S.in_loop == 0)
+            croak(type.TYPE + " not inside a loop or switch");
+        semicolon();
+        var stat = new type({ label: label });
+        if (ldef) ldef.references.push(stat);
+        return stat;
+    }
+
+    function for_() {
+        var for_await_error = "`for await` invalid in this context";
+        var await_tok = S.token;
+        if (await_tok.type == "name" && await_tok.value == "await") {
+            if (!can_await()) {
+                token_error(await_tok, for_await_error);
+            }
+            next();
+        } else {
+            await_tok = false;
+        }
+        expect("(");
+        var init = null;
+        if (!is("punc", ";")) {
+            init =
+                is("keyword", "var") ? (next(), var_(true)) :
+                is("keyword", "let") ? (next(), let_(true)) :
+                is("keyword", "const") ? (next(), const_(true)) :
+                is("name", "using") && is_token(peek(), "name") && (peek().value != "of" || S.input.peek_next_token_start_or_newline().char == "=") ? (next(), using_(true)) :
+                is("name", "await") && can_await() && is_token(peek(), "name", "using") ? (next(), await_using_(true)) :
+                                       expression(true, true);
+            var is_in = is("operator", "in");
+            var is_of = is("name", "of");
+            if (await_tok && !is_of) {
+                token_error(await_tok, for_await_error);
+            }
+            if (is_in || is_of) {
+                if (init instanceof AST_DefinitionsLike) {
+                    if (init.definitions.length > 1)
+                        token_error(init.start, "Only one variable declaration allowed in for..in loop");
+                    if (is_in && init instanceof AST_Using) {
+                        token_error(init.start, "Invalid using declaration in for..in loop");
+                    }
+                } else if (!(is_assignable(init) || (init = to_destructuring(init)) instanceof AST_Destructuring)) {
+                    token_error(init.start, "Invalid left-hand side in for..in loop");
+                }
+                next();
+                if (is_in) {
+                    return for_in(init);
+                } else {
+                    return for_of(init, !!await_tok);
+                }
+            }
+        } else if (await_tok) {
+            token_error(await_tok, for_await_error);
+        }
+        return regular_for(init);
+    }
+
+    function regular_for(init) {
+        expect(";");
+        var test = is("punc", ";") ? null : expression(true);
+        expect(";");
+        var step = is("punc", ")") ? null : expression(true);
+        expect(")");
+        return new AST_For({
+            init      : init,
+            condition : test,
+            step      : step,
+            body      : in_loop(function() { return statement(false, true); })
+        });
+    }
+
+    function for_of(init, is_await) {
+        var lhs = init instanceof AST_DefinitionsLike ? init.definitions[0].name : null;
+        var obj = expression(true);
+        expect(")");
+        return new AST_ForOf({
+            await  : is_await,
+            init   : init,
+            name   : lhs,
+            object : obj,
+            body   : in_loop(function() { return statement(false, true); })
+        });
+    }
+
+    function for_in(init) {
+        var obj = expression(true);
+        expect(")");
+        return new AST_ForIn({
+            init   : init,
+            object : obj,
+            body   : in_loop(function() { return statement(false, true); })
+        });
+    }
+
+    var arrow_function = function(start, argnames, is_async) {
+        if (has_newline_before(S.token)) {
+            croak("Unexpected newline before arrow (=>)");
+        }
+
+        expect_token("arrow", "=>");
+
+        var body = _function_body(is("punc", "{"), false, is_async);
+
+        return new AST_Arrow({
+            start    : start,
+            end      : body.end,
+            async    : is_async,
+            argnames : argnames,
+            body     : body
+        });
+    };
+
+    var function_ = function(ctor, is_generator, is_async, is_export_default) {
+        var in_statement = ctor === AST_Defun;
+        if (is("operator", "*")) {
+            is_generator = true;
+            next();
+        }
+
+        var name = is("name") ? as_symbol(in_statement ? AST_SymbolDefun : AST_SymbolLambda) : null;
+        if (in_statement && !name) {
+            if (is_export_default) {
+                ctor = AST_Function;
+            } else {
+                unexpected();
+            }
+        }
+
+        if (name && ctor !== AST_Accessor && !(name instanceof AST_SymbolDeclaration))
+            unexpected(prev());
+
+        var args = [];
+        var body = _function_body(true, is_generator, is_async, name, args);
+        return new ctor({
+            start : args.start,
+            end   : body.end,
+            is_generator: is_generator,
+            async : is_async,
+            name  : name,
+            argnames: args,
+            body  : body
+        });
+    };
+
+    class UsedParametersTracker {
+        constructor(is_parameter, strict, duplicates_ok = false) {
+            this.is_parameter = is_parameter;
+            this.duplicates_ok = duplicates_ok;
+            this.parameters = new Set();
+            this.duplicate = null;
+            this.default_assignment = false;
+            this.spread = false;
+            this.strict_mode = !!strict;
+        }
+        add_parameter(token) {
+            if (this.parameters.has(token.value)) {
+                if (this.duplicate === null) {
+                    this.duplicate = token;
+                }
+                this.check_strict();
+            } else {
+                this.parameters.add(token.value);
+                if (this.is_parameter) {
+                    switch (token.value) {
+                      case "arguments":
+                      case "eval":
+                      case "yield":
+                        if (this.strict_mode) {
+                            token_error(token, "Unexpected " + token.value + " identifier as parameter inside strict mode");
+                        }
+                        break;
+                      default:
+                        if (RESERVED_WORDS.has(token.value)) {
+                            unexpected();
+                        }
+                    }
+                }
+            }
+        }
+        mark_default_assignment(token) {
+            if (this.default_assignment === false) {
+                this.default_assignment = token;
+            }
+        }
+        mark_spread(token) {
+            if (this.spread === false) {
+                this.spread = token;
+            }
+        }
+        mark_strict_mode() {
+            this.strict_mode = true;
+        }
+        is_strict() {
+            return this.default_assignment !== false || this.spread !== false || this.strict_mode;
+        }
+        check_strict() {
+            if (this.is_strict() && this.duplicate !== null && !this.duplicates_ok) {
+                token_error(this.duplicate, "Parameter " + this.duplicate.value + " was used already");
+            }
+        }
+    }
+
+    function parameters(params) {
+        var used_parameters = new UsedParametersTracker(true, S.input.has_directive("use strict"));
+
+        expect("(");
+
+        while (!is("punc", ")")) {
+            var param = parameter(used_parameters);
+            params.push(param);
+
+            if (!is("punc", ")")) {
+                expect(",");
+            }
+
+            if (param instanceof AST_Expansion) {
+                break;
+            }
+        }
+
+        next();
+    }
+
+    function parameter(used_parameters, symbol_type) {
+        var param;
+        var expand = false;
+        if (used_parameters === undefined) {
+            used_parameters = new UsedParametersTracker(true, S.input.has_directive("use strict"));
+        }
+        if (is("expand", "...")) {
+            expand = S.token;
+            used_parameters.mark_spread(S.token);
+            next();
+        }
+        param = binding_element(used_parameters, symbol_type);
+
+        if (is("operator", "=") && expand === false) {
+            used_parameters.mark_default_assignment(S.token);
+            next();
+            param = new AST_DefaultAssign({
+                start: param.start,
+                left: param,
+                operator: "=",
+                right: expression(false),
+                end: S.token
+            });
+        }
+
+        if (expand !== false) {
+            if (!is("punc", ")")) {
+                unexpected();
+            }
+            param = new AST_Expansion({
+                start: expand,
+                expression: param,
+                end: expand
+            });
+        }
+        used_parameters.check_strict();
+
+        return param;
+    }
+
+    function binding_element(used_parameters, symbol_type) {
+        var elements = [];
+        var first = true;
+        var is_expand = false;
+        var expand_token;
+        var first_token = S.token;
+        if (used_parameters === undefined) {
+            const strict = S.input.has_directive("use strict");
+            const duplicates_ok = symbol_type === AST_SymbolVar;
+            used_parameters = new UsedParametersTracker(false, strict, duplicates_ok);
+        }
+        symbol_type = symbol_type === undefined ? AST_SymbolFunarg : symbol_type;
+        if (is("punc", "[")) {
+            next();
+            while (!is("punc", "]")) {
+                if (first) {
+                    first = false;
+                } else {
+                    expect(",");
+                }
+
+                if (is("expand", "...")) {
+                    is_expand = true;
+                    expand_token = S.token;
+                    used_parameters.mark_spread(S.token);
+                    next();
+                }
+                if (is("punc")) {
+                    switch (S.token.value) {
+                      case ",":
+                        elements.push(new AST_Hole({
+                            start: S.token,
+                            end: S.token
+                        }));
+                        continue;
+                      case "]": // Trailing comma after last element
+                        break;
+                      case "[":
+                      case "{":
+                        elements.push(binding_element(used_parameters, symbol_type));
+                        break;
+                      default:
+                        unexpected();
+                    }
+                } else if (is("name")) {
+                    used_parameters.add_parameter(S.token);
+                    elements.push(as_symbol(symbol_type));
+                } else {
+                    croak("Invalid function parameter");
+                }
+                if (is("operator", "=") && is_expand === false) {
+                    used_parameters.mark_default_assignment(S.token);
+                    next();
+                    elements[elements.length - 1] = new AST_DefaultAssign({
+                        start: elements[elements.length - 1].start,
+                        left: elements[elements.length - 1],
+                        operator: "=",
+                        right: expression(false),
+                        end: S.token
+                    });
+                }
+                if (is_expand) {
+                    if (!is("punc", "]")) {
+                        croak("Rest element must be last element");
+                    }
+                    elements[elements.length - 1] = new AST_Expansion({
+                        start: expand_token,
+                        expression: elements[elements.length - 1],
+                        end: expand_token
+                    });
+                }
+            }
+            expect("]");
+            used_parameters.check_strict();
+            return new AST_Destructuring({
+                start: first_token,
+                names: elements,
+                is_array: true,
+                end: prev()
+            });
+        } else if (is("punc", "{")) {
+            next();
+            while (!is("punc", "}")) {
+                if (first) {
+                    first = false;
+                } else {
+                    expect(",");
+                }
+                if (is("expand", "...")) {
+                    is_expand = true;
+                    expand_token = S.token;
+                    used_parameters.mark_spread(S.token);
+                    next();
+                }
+                if (is("name") && (is_token(peek(), "punc") || is_token(peek(), "operator")) && [",", "}", "="].includes(peek().value)) {
+                    used_parameters.add_parameter(S.token);
+                    var start = prev();
+                    var value = as_symbol(symbol_type);
+                    if (is_expand) {
+                        elements.push(new AST_Expansion({
+                            start: expand_token,
+                            expression: value,
+                            end: value.end,
+                        }));
+                    } else {
+                        elements.push(new AST_ObjectKeyVal({
+                            start: start,
+                            key: value.name,
+                            value: value,
+                            end: value.end,
+                        }));
+                    }
+                } else if (is("punc", "}")) {
+                    continue; // Allow trailing hole
+                } else {
+                    var property_token = S.token;
+                    var property = as_property_name();
+                    if (property === null) {
+                        unexpected(prev());
+                    } else if (prev().type === "name" && !is("punc", ":")) {
+                        elements.push(new AST_ObjectKeyVal({
+                            start: prev(),
+                            key: property,
+                            value: new symbol_type({
+                                start: prev(),
+                                name: property,
+                                end: prev()
+                            }),
+                            end: prev()
+                        }));
+                    } else {
+                        expect(":");
+                        elements.push(new AST_ObjectKeyVal({
+                            start: property_token,
+                            quote: property_token.quote,
+                            key: property,
+                            value: binding_element(used_parameters, symbol_type),
+                            end: prev()
+                        }));
+                    }
+                }
+                if (is_expand) {
+                    if (!is("punc", "}")) {
+                        croak("Rest element must be last element");
+                    }
+                } else if (is("operator", "=")) {
+                    used_parameters.mark_default_assignment(S.token);
+                    next();
+                    elements[elements.length - 1].value = new AST_DefaultAssign({
+                        start: elements[elements.length - 1].value.start,
+                        left: elements[elements.length - 1].value,
+                        operator: "=",
+                        right: expression(false),
+                        end: S.token
+                    });
+                }
+            }
+            expect("}");
+            used_parameters.check_strict();
+            return new AST_Destructuring({
+                start: first_token,
+                names: elements,
+                is_array: false,
+                end: prev()
+            });
+        } else if (is("name")) {
+            used_parameters.add_parameter(S.token);
+            return as_symbol(symbol_type);
+        } else {
+            croak("Invalid function parameter");
+        }
+    }
+
+    function params_or_seq_(allow_arrows, maybe_sequence) {
+        var spread_token;
+        var invalid_sequence;
+        var trailing_comma;
+        var a = [];
+        expect("(");
+        while (!is("punc", ")")) {
+            if (spread_token) unexpected(spread_token);
+            if (is("expand", "...")) {
+                spread_token = S.token;
+                if (maybe_sequence) invalid_sequence = S.token;
+                next();
+                a.push(new AST_Expansion({
+                    start: prev(),
+                    expression: expression(),
+                    end: S.token,
+                }));
+            } else {
+                a.push(expression());
+            }
+            if (!is("punc", ")")) {
+                expect(",");
+                if (is("punc", ")")) {
+                    trailing_comma = prev();
+                    if (maybe_sequence) invalid_sequence = trailing_comma;
+                }
+            }
+        }
+        expect(")");
+        if (allow_arrows && is("arrow", "=>")) {
+            if (spread_token && trailing_comma) unexpected(trailing_comma);
+        } else if (invalid_sequence) {
+            unexpected(invalid_sequence);
+        }
+        return a;
+    }
+
+    function _function_body(block, generator, is_async, name, args) {
+        var loop = S.in_loop;
+        var labels = S.labels;
+        var current_generator = S.in_generator;
+        var current_async = S.in_async;
+        ++S.in_function;
+        if (generator)
+            S.in_generator = S.in_function;
+        if (is_async)
+            S.in_async = S.in_function;
+        if (args) parameters(args);
+        if (block)
+            S.in_directives = true;
+        S.in_loop = 0;
+        S.labels = [];
+        if (block) {
+            S.input.push_directives_stack();
+            var a = block_();
+            if (name) _verify_symbol(name);
+            if (args) args.forEach(_verify_symbol);
+            S.input.pop_directives_stack();
+        } else {
+            var a = [new AST_Return({
+                start: S.token,
+                value: expression(false),
+                end: S.token
+            })];
+        }
+        --S.in_function;
+        S.in_loop = loop;
+        S.labels = labels;
+        S.in_generator = current_generator;
+        S.in_async = current_async;
+        return a;
+    }
+
+    function _await_expression() {
+        // Previous token must be "await" and not be interpreted as an identifier
+        if (!can_await()) {
+            croak("Unexpected await expression outside async function",
+                S.prev.line, S.prev.col, S.prev.pos);
+        }
+        // the await expression is parsed as a unary expression in Babel
+        return new AST_Await({
+            start: prev(),
+            end: S.token,
+            expression : maybe_unary(true),
+        });
+    }
+
+    function _yield_expression() {
+        var start = S.token;
+        var star = false;
+        var has_expression = true;
+
+        // Attempt to get expression or star (and then the mandatory expression)
+        // behind yield on the same line.
+        //
+        // If nothing follows on the same line of the yieldExpression,
+        // it should default to the value `undefined` for yield to return.
+        // In that case, the `undefined` stored as `null` in ast.
+        //
+        // Note 1: It isn't allowed for yield* to close without an expression
+        // Note 2: If there is a nlb between yield and star, it is interpret as
+        //         yield <explicit undefined> <inserted automatic semicolon> *
+        if (
+            can_insert_semicolon()
+            || is("punc") && PUNC_AFTER_EXPRESSION.has(S.token.value)
+            || is("template_cont")
+        ) {
+            has_expression = false;
+        } else if (is("operator", "*")) {
+            star = true;
+            next();
+        }
+
+        return new AST_Yield({
+            start      : start,
+            is_star    : star,
+            expression : has_expression ? expression() : null,
+            end        : prev()
+        });
+    }
+
+    function if_() {
+        var cond = parenthesised(), body = statement(false, false, true), belse = null;
+        if (is("keyword", "else")) {
+            next();
+            belse = statement(false, false, true);
+        }
+        return new AST_If({
+            condition   : cond,
+            body        : body,
+            alternative : belse
+        });
+    }
+
+    function block_() {
+        expect("{");
+        var a = [];
+        while (!is("punc", "}")) {
+            if (is("eof")) unexpected();
+            a.push(statement());
+        }
+        next();
+        return a;
+    }
+
+    function switch_body_() {
+        expect("{");
+        var a = [], cur = null, branch = null, tmp;
+        while (!is("punc", "}")) {
+            if (is("eof")) unexpected();
+            if (is("keyword", "case")) {
+                if (branch) branch.end = prev();
+                cur = [];
+                branch = new AST_Case({
+                    start      : (tmp = S.token, next(), tmp),
+                    expression : expression(true),
+                    body       : cur
+                });
+                a.push(branch);
+                expect(":");
+            } else if (is("keyword", "default")) {
+                if (branch) branch.end = prev();
+                cur = [];
+                branch = new AST_Default({
+                    start : (tmp = S.token, next(), expect(":"), tmp),
+                    body  : cur
+                });
+                a.push(branch);
+            } else {
+                if (!cur) unexpected();
+                cur.push(statement());
+            }
+        }
+        if (branch) branch.end = prev();
+        next();
+        return a;
+    }
+
+    function try_() {
+        var body, bcatch = null, bfinally = null;
+        body = new AST_TryBlock({
+            start : S.token,
+            body  : block_(),
+            end   : prev(),
+        });
+        if (is("keyword", "catch")) {
+            var start = S.token;
+            next();
+            if (is("punc", "{")) {
+                var name = null;
+            } else {
+                expect("(");
+                var name = parameter(undefined, AST_SymbolCatch);
+                expect(")");
+            }
+            bcatch = new AST_Catch({
+                start   : start,
+                argname : name,
+                body    : block_(),
+                end     : prev()
+            });
+        }
+        if (is("keyword", "finally")) {
+            var start = S.token;
+            next();
+            bfinally = new AST_Finally({
+                start : start,
+                body  : block_(),
+                end   : prev()
+            });
+        }
+        if (!bcatch && !bfinally)
+            croak("Missing catch/finally blocks");
+        return new AST_Try({
+            body     : body,
+            bcatch   : bcatch,
+            bfinally : bfinally
+        });
+    }
+
+    /**
+     * var
+     *   vardef1 = 2,
+     *   vardef2 = 3;
+     */
+    function vardefs(no_in, kind) {
+        var var_defs = [];
+        var def;
+        for (;;) {
+            var sym_type =
+                kind === "var" ? AST_SymbolVar :
+                kind === "const" ? AST_SymbolConst :
+                kind === "let" ? AST_SymbolLet :
+                kind === "using" ? AST_SymbolUsing :
+                kind === "await using" ? AST_SymbolUsing : null;
+            var def_type = kind === "using" || kind === "await using" ? AST_UsingDef : AST_VarDef;
+            // var { a } = b
+            if (is("punc", "{") || is("punc", "[")) {
+                def = new def_type({
+                    start: S.token,
+                    name: binding_element(undefined, sym_type),
+                    value: is("operator", "=") ? (expect_token("operator", "="), expression(false, no_in)) : null,
+                    end: prev()
+                });
+            } else {
+                def = new def_type({
+                    start : S.token,
+                    name  : as_symbol(sym_type),
+                    value : is("operator", "=")
+                        ? (next(), expression(false, no_in))
+                        : !no_in && (kind === "const" || kind === "using" || kind === "await using")
+                            ? croak("Missing initializer in " + kind + " declaration") : null,
+                    end   : prev()
+                });
+                if (def.name.name == "import") croak("Unexpected token: import");
+            }
+            var_defs.push(def);
+            if (!is("punc", ","))
+                break;
+            next();
+        }
+        return var_defs;
+    }
+
+    var var_ = function(no_in) {
+        return new AST_Var({
+            start       : prev(),
+            definitions : vardefs(no_in, "var"),
+            end         : prev()
+        });
+    };
+
+    var let_ = function(no_in) {
+        return new AST_Let({
+            start       : prev(),
+            definitions : vardefs(no_in, "let"),
+            end         : prev()
+        });
+    };
+
+    var const_ = function(no_in) {
+        return new AST_Const({
+            start       : prev(),
+            definitions : vardefs(no_in, "const"),
+            end         : prev()
+        });
+    };
+
+    var using_ = function(no_in) {
+        return new AST_Using({
+            start       : prev(),
+            await       : false,
+            definitions : vardefs(no_in, "using"),
+            end         : prev()
+        });
+    };
+
+    var await_using_ = function(no_in) {
+        // Assumption: When await_using_ is called, only the `await` token has been consumed.
+        return new AST_Using({
+            start       : prev(),
+            await       : true,
+            definitions : (next(), vardefs(no_in, "await using")),
+            end         : prev()
+        });
+    };
+
+    var new_ = function(allow_calls) {
+        var start = S.token;
+        expect_token("operator", "new");
+        if (is("punc", ".")) {
+            next();
+            expect_token("name", "target");
+            return subscripts(new AST_NewTarget({
+                start : start,
+                end   : prev()
+            }), allow_calls);
+        }
+        var newexp = expr_atom(false), args;
+        if (is("punc", "(")) {
+            next();
+            args = expr_list(")", true);
+        } else {
+            args = [];
+        }
+        var call = new AST_New({
+            start      : start,
+            expression : newexp,
+            args       : args,
+            end        : prev()
+        });
+        annotate(call);
+        return subscripts(call, allow_calls);
+    };
+
+    function as_atom_node() {
+        var tok = S.token, ret;
+        switch (tok.type) {
+          case "name":
+            ret = _make_symbol(AST_SymbolRef);
+            break;
+          case "num":
+            if (tok.value === Infinity) {
+                // very large float values are parsed as Infinity
+                ret = new AST_Infinity({
+                    start: tok,
+                    end: tok,
+                });
+            } else {
+                ret = new AST_Number({
+                    start: tok,
+                    end: tok,
+                    value: tok.value,
+                    raw: LATEST_RAW
+                });
+            }
+            break;
+          case "big_int":
+            ret = new AST_BigInt({
+                start: tok,
+                end: tok,
+                value: tok.value,
+                raw: LATEST_RAW,
+            });
+            break;
+          case "string":
+            ret = new AST_String({
+                start : tok,
+                end   : tok,
+                value : tok.value,
+                quote : tok.quote
+            });
+            annotate(ret);
+            break;
+          case "regexp":
+            const [_, source, flags] = tok.value.match(/^\/(.*)\/(\w*)$/);
+
+            ret = new AST_RegExp({ start: tok, end: tok, value: { source, flags } });
+            break;
+          case "atom":
+            switch (tok.value) {
+              case "false":
+                ret = new AST_False({ start: tok, end: tok });
+                break;
+              case "true":
+                ret = new AST_True({ start: tok, end: tok });
+                break;
+              case "null":
+                ret = new AST_Null({ start: tok, end: tok });
+                break;
+            }
+            break;
+        }
+        next();
+        return ret;
+    }
+
+    function to_fun_args(ex, default_seen_above) {
+        var insert_default = function(ex, default_value) {
+            if (default_value) {
+                return new AST_DefaultAssign({
+                    start: ex.start,
+                    left: ex,
+                    operator: "=",
+                    right: default_value,
+                    end: default_value.end
+                });
+            }
+            return ex;
+        };
+        if (ex instanceof AST_Object) {
+            return insert_default(new AST_Destructuring({
+                start: ex.start,
+                end: ex.end,
+                is_array: false,
+                names: ex.properties.map(prop => to_fun_args(prop))
+            }), default_seen_above);
+        } else if (ex instanceof AST_ObjectKeyVal) {
+            ex.value = to_fun_args(ex.value);
+            return insert_default(ex, default_seen_above);
+        } else if (ex instanceof AST_Hole) {
+            return ex;
+        } else if (ex instanceof AST_Destructuring) {
+            ex.names = ex.names.map(name => to_fun_args(name));
+            return insert_default(ex, default_seen_above);
+        } else if (ex instanceof AST_SymbolRef) {
+            return insert_default(new AST_SymbolFunarg({
+                name: ex.name,
+                start: ex.start,
+                end: ex.end
+            }), default_seen_above);
+        } else if (ex instanceof AST_Expansion) {
+            ex.expression = to_fun_args(ex.expression);
+            return insert_default(ex, default_seen_above);
+        } else if (ex instanceof AST_Array) {
+            return insert_default(new AST_Destructuring({
+                start: ex.start,
+                end: ex.end,
+                is_array: true,
+                names: ex.elements.map(elm => to_fun_args(elm))
+            }), default_seen_above);
+        } else if (ex instanceof AST_Assign) {
+            return insert_default(to_fun_args(ex.left, ex.right), default_seen_above);
+        } else if (ex instanceof AST_DefaultAssign) {
+            ex.left = to_fun_args(ex.left);
+            return ex;
+        } else {
+            croak("Invalid function parameter", ex.start.line, ex.start.col);
+        }
+    }
+
+    var expr_atom = function(allow_calls, allow_arrows) {
+        if (is("operator", "new")) {
+            return new_(allow_calls);
+        }
+        if (is("name", "import") && is_token(peek(), "punc", ".")) {
+            return parse_import_expr(allow_calls);
+        }
+        var start = S.token;
+        var peeked;
+        var async = is("name", "async")
+            && (peeked = peek()).value != "["
+            && peeked.type != "arrow"
+            && as_atom_node();
+        if (is("punc")) {
+            switch (S.token.value) {
+              case "(":
+                if (async && !allow_calls) break;
+                var exprs = params_or_seq_(allow_arrows, !async);
+                if (allow_arrows && is("arrow", "=>")) {
+                    return arrow_function(start, exprs.map(e => to_fun_args(e)), !!async);
+                }
+                var ex = async ? new AST_Call({
+                    expression: async,
+                    args: exprs
+                }) : to_expr_or_sequence(start, exprs);
+                if (ex.start) {
+                    const outer_comments_before = start.comments_before.length;
+                    outer_comments_before_counts.set(start, outer_comments_before);
+                    ex.start.comments_before.unshift(...start.comments_before);
+                    start.comments_before = ex.start.comments_before;
+                    if (outer_comments_before == 0 && start.comments_before.length > 0) {
+                        var comment = start.comments_before[0];
+                        if (!comment.nlb) {
+                            comment.nlb = start.nlb;
+                            start.nlb = false;
+                        }
+                    }
+                    start.comments_after = ex.start.comments_after;
+                }
+                ex.start = start;
+                var end = prev();
+                if (ex.end) {
+                    end.comments_before = ex.end.comments_before;
+                    ex.end.comments_after.push(...end.comments_after);
+                    end.comments_after = ex.end.comments_after;
+                }
+                ex.end = end;
+                if (ex instanceof AST_Call) annotate(ex);
+                return subscripts(ex, allow_calls);
+              case "[":
+                return subscripts(array_(), allow_calls);
+              case "{":
+                return subscripts(object_or_destructuring_(), allow_calls);
+            }
+            if (!async) unexpected();
+        }
+        if (allow_arrows && is("name") && is_token(peek(), "arrow")) {
+            var param = new AST_SymbolFunarg({
+                name: S.token.value,
+                start: start,
+                end: start,
+            });
+            next();
+            return arrow_function(start, [param], !!async);
+        }
+        if (is("keyword", "function")) {
+            next();
+            var func = function_(AST_Function, false, !!async);
+            func.start = start;
+            func.end = prev();
+            return subscripts(func, allow_calls);
+        }
+        if (async) return subscripts(async, allow_calls);
+        if (is("keyword", "class")) {
+            next();
+            var cls = class_(AST_ClassExpression);
+            cls.start = start;
+            cls.end = prev();
+            return subscripts(cls, allow_calls);
+        }
+        if (is("template_head")) {
+            return subscripts(template_string(), allow_calls);
+        }
+        if (ATOMIC_START_TOKEN.has(S.token.type)) {
+            return subscripts(as_atom_node(), allow_calls);
+        }
+        unexpected();
+    };
+
+    function template_string() {
+        var segments = [], start = S.token;
+
+        segments.push(new AST_TemplateSegment({
+            start: S.token,
+            raw: TEMPLATE_RAWS.get(S.token),
+            value: S.token.value,
+            end: S.token
+        }));
+
+        while (!S.token.template_end) {
+            next();
+            handle_regexp();
+            segments.push(expression(true));
+
+            segments.push(new AST_TemplateSegment({
+                start: S.token,
+                raw: TEMPLATE_RAWS.get(S.token),
+                value: S.token.value,
+                end: S.token
+            }));
+        }
+        next();
+
+        return new AST_TemplateString({
+            start: start,
+            segments: segments,
+            end: S.token
+        });
+    }
+
+    function expr_list(closing, allow_trailing_comma, allow_empty) {
+        var first = true, a = [];
+        while (!is("punc", closing)) {
+            if (first) first = false; else expect(",");
+            if (allow_trailing_comma && is("punc", closing)) break;
+            if (is("punc", ",") && allow_empty) {
+                a.push(new AST_Hole({ start: S.token, end: S.token }));
+            } else if (is("expand", "...")) {
+                next();
+                a.push(new AST_Expansion({start: prev(), expression: expression(),end: S.token}));
+            } else {
+                a.push(expression(false));
+            }
+        }
+        next();
+        return a;
+    }
+
+    var array_ = embed_tokens(function() {
+        expect("[");
+        return new AST_Array({
+            elements: expr_list("]", !options.strict, true)
+        });
+    });
+
+    var create_accessor = embed_tokens((is_generator, is_async) => {
+        return function_(AST_Accessor, is_generator, is_async);
+    });
+
+    var object_or_destructuring_ = embed_tokens(function object_or_destructuring_() {
+        var start = S.token, first = true, a = [];
+        expect("{");
+        while (!is("punc", "}")) {
+            if (first) first = false; else expect(",");
+            if (!options.strict && is("punc", "}"))
+                // allow trailing comma
+                break;
+
+            start = S.token;
+            if (start.type == "expand") {
+                next();
+                a.push(new AST_Expansion({
+                    start: start,
+                    expression: expression(false),
+                    end: prev(),
+                }));
+                continue;
+            }
+            if(is("privatename")) {
+                croak("private fields are not allowed in an object");
+            }
+            var name = as_property_name();
+            var value;
+
+            // Check property and fetch value
+            if (!is("punc", ":")) {
+                var concise = object_or_class_property(name, start);
+                if (concise) {
+                    a.push(concise);
+                    continue;
+                }
+
+                value = new AST_SymbolRef({
+                    start: prev(),
+                    name: name,
+                    end: prev()
+                });
+            } else if (name === null) {
+                unexpected(prev());
+            } else {
+                next(); // `:` - see first condition
+                value = expression(false);
+            }
+
+            // Check for default value and alter value accordingly if necessary
+            if (is("operator", "=")) {
+                next();
+                value = new AST_Assign({
+                    start: start,
+                    left: value,
+                    operator: "=",
+                    right: expression(false),
+                    logical: false,
+                    end: prev()
+                });
+            }
+
+            // Create property
+            const kv = new AST_ObjectKeyVal({
+                start: start,
+                quote: start.quote,
+                key: name,
+                value: value,
+                end: prev()
+            });
+            a.push(annotate(kv));
+        }
+        next();
+        return new AST_Object({ properties: a });
+    });
+
+    function class_(KindOfClass, is_export_default) {
+        var start, method, class_name, extends_, properties = [];
+
+        S.input.push_directives_stack(); // Push directive stack, but not scope stack
+        S.input.add_directive("use strict");
+
+        if (S.token.type == "name" && S.token.value != "extends") {
+            class_name = as_symbol(KindOfClass === AST_DefClass ? AST_SymbolDefClass : AST_SymbolClass);
+        }
+
+        if (KindOfClass === AST_DefClass && !class_name) {
+            if (is_export_default) {
+                KindOfClass = AST_ClassExpression;
+            } else {
+                unexpected();
+            }
+        }
+
+        if (S.token.value == "extends") {
+            next();
+            extends_ = expression(true);
+        }
+
+        expect("{");
+        // mark in class feild,
+        const save_in_class = S.in_class;
+        S.in_class = true;
+        while (is("punc", ";")) { next(); }  // Leading semicolons are okay in class bodies.
+        while (!is("punc", "}")) {
+            start = S.token;
+            method = object_or_class_property(as_property_name(), start, true);
+            if (!method) { unexpected(); }
+            properties.push(method);
+            while (is("punc", ";")) { next(); }
+        }
+        // mark in class feild,
+        S.in_class = save_in_class;
+
+        S.input.pop_directives_stack();
+
+        next();
+
+        return new KindOfClass({
+            start: start,
+            name: class_name,
+            extends: extends_,
+            properties: properties,
+            end: prev(),
+        });
+    }
+
+    function object_or_class_property(name, start, is_class) {
+        const get_symbol_ast = (name, SymbolClass) => {
+            if (typeof name === "string") {
+                return new SymbolClass({ start, name, end: prev() });
+            } else if (name === null) {
+                unexpected();
+            }
+            return name;
+        };
+
+        var is_private = prev().type === "privatename";
+        const is_not_method_start = () =>
+            !is("punc", "(") && !is("punc", ",") && !is("punc", "}") && !is("punc", ";") && !is("operator", "=") && !is_private;
+
+        var is_async = false;
+        var is_static = false;
+        var is_generator = false;
+        var accessor_type = null;
+
+        if (is_class && name === "static" && is_not_method_start()) {
+            const static_block = class_static_block();
+            if (static_block != null) {
+                return static_block;
+            }
+            is_static = true;
+            name = as_property_name();
+        }
+        if (name === "async" && is_not_method_start()) {
+            is_async = true;
+            name = as_property_name();
+        }
+        if (prev().type === "operator" && prev().value === "*") {
+            is_generator = true;
+            name = as_property_name();
+        }
+        if ((name === "get" || name === "set") && is_not_method_start()) {
+            accessor_type = name;
+            name = as_property_name();
+        }
+        if (!is_private && prev().type === "privatename") {
+            is_private = true;
+        }
+
+        const property_token = prev();
+
+        if (accessor_type != null) {
+            if (!is_private) {
+                const AccessorClass = accessor_type === "get"
+                    ? AST_ObjectGetter
+                    : AST_ObjectSetter;
+
+                name = get_symbol_ast(name, AST_SymbolMethod);
+                return annotate(new AccessorClass({
+                    start,
+                    static: is_static,
+                    key: name,
+                    quote: name instanceof AST_SymbolMethod ? property_token.quote : undefined,
+                    value: create_accessor(),
+                    end: prev()
+                }));
+            } else {
+                const AccessorClass = accessor_type === "get"
+                    ? AST_PrivateGetter
+                    : AST_PrivateSetter;
+
+                return annotate(new AccessorClass({
+                    start,
+                    static: is_static,
+                    key: get_symbol_ast(name, AST_SymbolMethod),
+                    value: create_accessor(),
+                    end: prev(),
+                }));
+            }
+        }
+
+        if (is("punc", "(")) {
+            name = get_symbol_ast(name, AST_SymbolMethod);
+            const AST_MethodVariant = is_private
+                ? AST_PrivateMethod
+                : AST_ConciseMethod;
+            var node = new AST_MethodVariant({
+                start       : start,
+                static      : is_static,
+                key         : name,
+                quote       : name instanceof AST_SymbolMethod ?
+                              property_token.quote : undefined,
+                value       : create_accessor(is_generator, is_async),
+                end         : prev()
+            });
+            return annotate(node);
+        }
+
+        if (is_class) {
+            const AST_SymbolVariant = is_private
+                ? AST_SymbolPrivateProperty
+                : AST_SymbolClassProperty;
+            const AST_ClassPropertyVariant = is_private
+                ? AST_ClassPrivateProperty
+                : AST_ClassProperty;
+
+            const key = get_symbol_ast(name, AST_SymbolVariant);
+            const quote = key instanceof AST_SymbolClassProperty
+                ? property_token.quote
+                : undefined;
+            if (is("operator", "=")) {
+                next();
+                return annotate(
+                    new AST_ClassPropertyVariant({
+                        start,
+                        static: is_static,
+                        quote,
+                        key,
+                        value: expression(false),
+                        end: prev()
+                    })
+                );
+            } else if (
+                is("name")
+                || is("privatename")
+                || is("punc", "[")
+                || is("operator", "*")
+                || is("punc", ";")
+                || is("punc", "}")
+                || is("string")
+                || is("num")
+                || is("big_int")
+            ) {
+                return annotate(
+                    new AST_ClassPropertyVariant({
+                        start,
+                        static: is_static,
+                        quote,
+                        key,
+                        end: prev()
+                    })
+                );
+            }
+        }
+    }
+
+    function class_static_block() {
+        if (!is("punc", "{")) {
+            return null;
+        }
+
+        const start = S.token;
+        const body = [];
+
+        next();
+
+        while (!is("punc", "}")) {
+            body.push(statement());
+        }
+
+        next();
+
+        return new AST_ClassStaticBlock({ start, body, end: prev() });
+    }
+
+    function maybe_import_attributes() {
+        if (
+            (is("keyword", "with") || is("name", "assert"))
+            && !has_newline_before(S.token)
+        ) {
+            next();
+            return object_or_destructuring_();
+        }
+        return null;
+    }
+
+    function import_statement() {
+        var start = prev();
+
+        // import source x from "..."
+        // import defer * as x from "..."
+        var phase = null;
+        if (is("name", "source") || is("name", "defer")) {
+            var peeked = peek();
+            if (!is_token(peeked, "name", "from") && !is_token(peeked, "punc", ",")) {
+                phase = S.token.value;
+                next();
+            }
+        }
+
+        var imported_name;
+        var imported_names;
+        if (is("name")) {
+            imported_name = as_symbol(AST_SymbolImport);
+        }
+
+        if (is("punc", ",")) {
+            next();
+        }
+
+        imported_names = map_names(true);
+
+        if (imported_names || imported_name) {
+            expect_token("name", "from");
+        }
+        var mod_str = S.token;
+        if (mod_str.type !== "string") {
+            unexpected();
+        }
+        next();
+
+        const attributes = maybe_import_attributes();
+
+        return new AST_Import({
+            start,
+            imported_name,
+            imported_names,
+            module_name: new AST_String({
+                start: mod_str,
+                value: mod_str.value,
+                quote: mod_str.quote,
+                end: mod_str,
+            }),
+            attributes,
+            phase,
+            end: S.token,
+        });
+    }
+
+    //   import.meta
+    //   import.source("module")
+    //   import.defer("module")
+    function parse_import_expr(allow_calls) {
+        var start = S.token;
+        expect_token("name", "import");
+        expect_token("punc", ".");
+        if (is("name", "source") || is("name", "defer")) {
+            var phase = S.token.value;
+            next();
+            if (!is("punc", "(")) {
+                croak("'import." + phase + "' can only be used in a dynamic import");
+            }
+            next();
+            var args = expr_list(")");
+            return subscripts(new AST_DynamicImport({
+                start: start,
+                phase: phase,
+                args: args,
+                end: prev()
+            }), allow_calls);
+        }
+        expect_token("name", "meta");
+        return subscripts(new AST_ImportMeta({
+            start: start,
+            end: prev()
+        }), allow_calls);
+    }
+
+    function map_name(is_import) {
+        function make_symbol(type, quote) {
+            return new type({
+                name: as_property_name(),
+                quote: quote || undefined,
+                start: prev(),
+                end: prev()
+            });
+        }
+
+        var foreign_type = is_import ? AST_SymbolImportForeign : AST_SymbolExportForeign;
+        var type = is_import ? AST_SymbolImport : AST_SymbolExport;
+        var start = S.token;
+        var foreign_name;
+        var name;
+
+        if (is_import) {
+            foreign_name = make_symbol(foreign_type, start.quote);
+        } else {
+            name = make_symbol(type, start.quote);
+        }
+        if (is("name", "as")) {
+            next();  // The "as" word
+            if (is_import) {
+                name = make_symbol(type);
+            } else {
+                foreign_name = make_symbol(foreign_type, S.token.quote);
+            }
+        } else {
+            if (is_import) {
+                name = new type(foreign_name);
+            } else {
+                foreign_name = new foreign_type(name);
+            }
+        }
+
+        return new AST_NameMapping({
+            start: start,
+            foreign_name: foreign_name,
+            name: name,
+            end: prev(),
+        });
+    }
+
+    function map_nameAsterisk(is_import, import_or_export_foreign_name) {
+        var foreign_type = is_import ? AST_SymbolImportForeign : AST_SymbolExportForeign;
+        var type = is_import ? AST_SymbolImport : AST_SymbolExport;
+        var start = S.token;
+        var name, foreign_name;
+        var end = prev();
+
+        if (is_import) {
+            name = import_or_export_foreign_name;
+        } else {
+            foreign_name = import_or_export_foreign_name;
+        }
+
+        name = name || new type({
+            start: start,
+            name: "*",
+            end: end,
+        });
+
+        foreign_name = foreign_name || new foreign_type({
+            start: start,
+            name: "*",
+            end: end,
+        });
+
+        return new AST_NameMapping({
+            start: start,
+            foreign_name: foreign_name,
+            name: name,
+            end: end,
+        });
+    }
+
+    function map_names(is_import) {
+        var names;
+        if (is("punc", "{")) {
+            next();
+            names = [];
+            while (!is("punc", "}")) {
+                names.push(map_name(is_import));
+                if (is("punc", ",")) {
+                    next();
+                }
+            }
+            next();
+        } else if (is("operator", "*")) {
+            var name;
+            next();
+            if (is("name", "as")) {
+                next();  // The "as" word
+                name = is_import ? as_symbol(AST_SymbolImport) : as_symbol_or_string(AST_SymbolExportForeign);
+            }
+            names = [map_nameAsterisk(is_import, name)];
+        }
+        return names;
+    }
+
+    function export_statement() {
+        var start = S.token;
+        var is_default;
+        var exported_names;
+
+        if (is("keyword", "default")) {
+            is_default = true;
+            next();
+        } else if (exported_names = map_names(false)) {
+            if (is("name", "from")) {
+                next();
+
+                var mod_str = S.token;
+                if (mod_str.type !== "string") {
+                    unexpected();
+                }
+                next();
+
+                const attributes = maybe_import_attributes();
+
+                return new AST_Export({
+                    start: start,
+                    is_default: is_default,
+                    exported_names: exported_names,
+                    module_name: new AST_String({
+                        start: mod_str,
+                        value: mod_str.value,
+                        quote: mod_str.quote,
+                        end: mod_str,
+                    }),
+                    end: prev(),
+                    attributes
+                });
+            } else {
+                return new AST_Export({
+                    start: start,
+                    is_default: is_default,
+                    exported_names: exported_names,
+                    end: prev(),
+                });
+            }
+        }
+
+        var node;
+        var exported_value;
+        var exported_definition;
+        if (is("punc", "{")
+            || is_default
+                && (is("keyword", "class") || is("keyword", "function"))
+                && is_token(peek(), "punc")) {
+            exported_value = expression(false);
+            semicolon();
+        } else if ((node = statement(is_default)) instanceof AST_Definitions && is_default) {
+            unexpected(node.start);
+        } else if (
+            node instanceof AST_Definitions
+            || node instanceof AST_Defun
+            || node instanceof AST_DefClass
+        ) {
+            exported_definition = node;
+        } else if (
+            node instanceof AST_ClassExpression
+            || node instanceof AST_Function
+        ) {
+            exported_value = node;
+        } else if (node instanceof AST_SimpleStatement) {
+            exported_value = node.body;
+        } else {
+            unexpected(node.start);
+        }
+
+        return new AST_Export({
+            start: start,
+            is_default: is_default,
+            exported_value: exported_value,
+            exported_definition: exported_definition,
+            end: prev(),
+            attributes: null
+        });
+    }
+
+    function as_property_name() {
+        var tmp = S.token;
+        switch (tmp.type) {
+          case "punc":
+            if (tmp.value === "[") {
+                next();
+                var ex = expression(false);
+                expect("]");
+                return ex;
+            } else unexpected(tmp);
+          case "operator":
+            if (tmp.value === "*") {
+                next();
+                return null;
+            }
+            if (!["delete", "in", "instanceof", "new", "typeof", "void"].includes(tmp.value)) {
+                unexpected(tmp);
+            }
+            /* falls through */
+          case "name":
+          case "privatename":
+          case "string":
+          case "keyword":
+          case "atom":
+            next();
+            return tmp.value;
+          case "num":
+          case "big_int":
+            next();
+            return "" + tmp.value;
+          default:
+            unexpected(tmp);
+        }
+    }
+
+    function as_name() {
+        var tmp = S.token;
+        if (tmp.type != "name" && tmp.type != "privatename") unexpected();
+        next();
+        return tmp.value;
+    }
+
+    function _make_symbol(type) {
+        var name = S.token.value;
+        return new (name == "this" ? AST_This :
+                    name == "super" ? AST_Super :
+                    type)({
+            name  : String(name),
+            start : S.token,
+            end   : S.token
+        });
+    }
+
+    function _verify_symbol(sym) {
+        var name = sym.name;
+        if (is_in_generator() && name == "yield") {
+            token_error(sym.start, "Yield cannot be used as identifier inside generators");
+        }
+        if (S.input.has_directive("use strict")) {
+            if (name == "yield") {
+                token_error(sym.start, "Unexpected yield identifier inside strict mode");
+            }
+            if (sym instanceof AST_SymbolDeclaration && (name == "arguments" || name == "eval")) {
+                token_error(sym.start, "Unexpected " + name + " in strict mode");
+            }
+        }
+    }
+
+    function as_symbol(type, noerror) {
+        if (!is("name")) {
+            if (!noerror) croak("Name expected");
+            return null;
+        }
+        var sym = _make_symbol(type);
+        _verify_symbol(sym);
+        next();
+        return sym;
+    }
+
+    function as_symbol_or_string(type) {
+        if (!is("name")) {
+            if (!is("string")) {
+                croak("Name or string expected");
+            }
+            var tok = S.token;
+            var ret = new type({
+                start : tok,
+                end   : tok,
+                name : tok.value,
+                quote : tok.quote
+            });
+            next();
+            return ret;
+        }
+        var sym = _make_symbol(type);
+        _verify_symbol(sym);
+        next();
+        return sym;
+    }
+
+    // Annotate AST_Call, AST_Lambda or AST_New with the special comments
+    function annotate(node, before_token = node.start) {
+        var comments = before_token.comments_before;
+        const comments_outside_parens = outer_comments_before_counts.get(before_token);
+        var i = comments_outside_parens != null ? comments_outside_parens : comments.length;
+        while (--i >= 0) {
+            var comment = comments[i];
+            if (/[@#]__/.test(comment.value)) {
+                if (/[@#]__PURE__/.test(comment.value)) {
+                    set_annotation(node, _PURE);
+                    break;
+                }
+                if (/[@#]__INLINE__/.test(comment.value)) {
+                    set_annotation(node, _INLINE);
+                    break;
+                }
+                if (/[@#]__NOINLINE__/.test(comment.value)) {
+                    set_annotation(node, _NOINLINE);
+                    break;
+                }
+                if (/[@#]__KEY__/.test(comment.value)) {
+                    set_annotation(node, _KEY);
+                    break;
+                }
+                if (/[@#]__MANGLE_PROP__/.test(comment.value)) {
+                    set_annotation(node, _MANGLEPROP);
+                    break;
+                }
+            }
+        }
+        return node;
+    }
+
+    var subscripts = function(expr, allow_calls, is_chain) {
+        var start = expr.start;
+        if (is("punc", ".")) {
+            next();
+            if(is("privatename") && !S.in_class) 
+                croak("Private field must be used in an enclosing class");
+            const AST_DotVariant = is("privatename") ? AST_DotHash : AST_Dot;
+            return annotate(subscripts(new AST_DotVariant({
+                start      : start,
+                expression : expr,
+                optional   : false,
+                property   : as_name(),
+                end        : prev()
+            }), allow_calls, is_chain));
+        }
+        if (is("punc", "[")) {
+            next();
+            var prop = expression(true);
+            expect("]");
+            return annotate(subscripts(new AST_Sub({
+                start      : start,
+                expression : expr,
+                optional   : false,
+                property   : prop,
+                end        : prev()
+            }), allow_calls, is_chain));
+        }
+        if (allow_calls && is("punc", "(")) {
+            next();
+            var call = new AST_Call({
+                start      : start,
+                expression : expr,
+                optional   : false,
+                args       : call_args(),
+                end        : prev()
+            });
+            annotate(call);
+            return subscripts(call, true, is_chain);
+        }
+
+        // Optional chain
+        if (is("punc", "?.")) {
+            next();
+
+            let chain_contents;
+
+            if (allow_calls && is("punc", "(")) {
+                next();
+
+                const call = new AST_Call({
+                    start,
+                    optional: true,
+                    expression: expr,
+                    args: call_args(),
+                    end: prev()
+                });
+                annotate(call);
+
+                chain_contents = subscripts(call, true, true);
+            } else if (is("name") || is("privatename")) {
+                if(is("privatename") && !S.in_class) 
+                    croak("Private field must be used in an enclosing class");
+                const AST_DotVariant = is("privatename") ? AST_DotHash : AST_Dot;
+                chain_contents = annotate(subscripts(new AST_DotVariant({
+                    start,
+                    expression: expr,
+                    optional: true,
+                    property: as_name(),
+                    end: prev()
+                }), allow_calls, true));
+            } else if (is("punc", "[")) {
+                next();
+                const property = expression(true);
+                expect("]");
+                chain_contents = annotate(subscripts(new AST_Sub({
+                    start,
+                    expression: expr,
+                    optional: true,
+                    property,
+                    end: prev()
+                }), allow_calls, true));
+            }
+
+            if (!chain_contents) unexpected();
+
+            if (chain_contents instanceof AST_Chain) return chain_contents;
+
+            return new AST_Chain({
+                start,
+                expression: chain_contents,
+                end: prev()
+            });
+        }
+
+        if (is("template_head")) {
+            if (is_chain) {
+                // a?.b`c` is a syntax error
+                unexpected();
+            }
+
+            return subscripts(new AST_PrefixedTemplateString({
+                start: start,
+                prefix: expr,
+                template_string: template_string(),
+                end: prev()
+            }), allow_calls);
+        }
+        return expr;
+    };
+
+    function call_args() {
+        var args = [];
+        while (!is("punc", ")")) {
+            if (is("expand", "...")) {
+                next();
+                args.push(new AST_Expansion({
+                    start: prev(),
+                    expression: expression(false),
+                    end: prev()
+                }));
+            } else {
+                args.push(expression(false));
+            }
+            if (!is("punc", ")")) {
+                expect(",");
+            }
+        }
+        next();
+        return args;
+    }
+
+    var maybe_unary = function(allow_calls, allow_arrows) {
+        var start = S.token;
+        if (start.type == "name" && start.value == "await" && can_await()) {
+            next();
+            return _await_expression();
+        }
+        if (is("operator") && UNARY_PREFIX.has(start.value)) {
+            next();
+            handle_regexp();
+            var ex = make_unary(AST_UnaryPrefix, start, maybe_unary(allow_calls));
+            ex.start = start;
+            ex.end = prev();
+            return ex;
+        }
+        var val = expr_atom(allow_calls, allow_arrows);
+        while (is("operator") && UNARY_POSTFIX.has(S.token.value) && !has_newline_before(S.token)) {
+            if (val instanceof AST_Arrow) unexpected();
+            val = make_unary(AST_UnaryPostfix, S.token, val);
+            val.start = start;
+            val.end = S.token;
+            next();
+        }
+        return val;
+    };
+
+    function make_unary(ctor, token, expr) {
+        var op = token.value;
+        switch (op) {
+          case "++":
+          case "--":
+            if (!is_assignable(expr))
+                croak("Invalid use of " + op + " operator", token.line, token.col, token.pos);
+            break;
+          case "delete":
+            if (expr instanceof AST_SymbolRef && S.input.has_directive("use strict"))
+                croak("Calling delete on expression not allowed in strict mode", expr.start.line, expr.start.col, expr.start.pos);
+            break;
+        }
+        return new ctor({ operator: op, expression: expr });
+    }
+
+    var expr_op = function(left, min_prec, no_in) {
+        var op = is("operator") ? S.token.value : null;
+        if (op == "in" && no_in) op = null;
+        if (op == "**" && left instanceof AST_UnaryPrefix
+            /* unary token in front not allowed - parenthesis required */
+            && !is_token(left.start, "punc", "(")
+            && left.operator !== "--" && left.operator !== "++")
+                unexpected(left.start);
+        var prec = op != null ? PRECEDENCE[op] : null;
+        if (prec != null && (prec > min_prec || (op === "**" && min_prec === prec))) {
+            next();
+            var right = expr_ops(no_in, prec, true);
+            return expr_op(new AST_Binary({
+                start    : left.start,
+                left     : left,
+                operator : op,
+                right    : right,
+                end      : right.end
+            }), min_prec, no_in);
+        }
+        return left;
+    };
+
+    function expr_ops(no_in, min_prec, allow_calls, allow_arrows) {
+        // maybe_unary won't return us a AST_SymbolPrivateProperty
+        if (!no_in && min_prec < PRECEDENCE["in"] && is("privatename")) {
+            if(!S.in_class) {
+                croak("Private field must be used in an enclosing class");
+            }
+
+            const start = S.token;
+            const key = new AST_SymbolPrivateProperty({
+                start,
+                name: start.value,
+                end: start
+            });
+            next();
+            expect_token("operator", "in");
+
+            const private_in = new AST_PrivateIn({
+                start,
+                key,
+                value: expr_ops(no_in, PRECEDENCE["in"], true),
+                end: prev()
+            });
+
+            return expr_op(private_in, 0, no_in);
+        } else {
+            return expr_op(maybe_unary(allow_calls, allow_arrows), min_prec, no_in);
+        }
+    }
+
+    var maybe_conditional = function(no_in) {
+        var start = S.token;
+        var expr = expr_ops(no_in, 0, true, true);
+        if (is("operator", "?")) {
+            next();
+            var yes = expression(false);
+            expect(":");
+            return new AST_Conditional({
+                start       : start,
+                condition   : expr,
+                consequent  : yes,
+                alternative : expression(false, no_in),
+                end         : prev()
+            });
+        }
+        return expr;
+    };
+
+    function is_assignable(expr) {
+        return expr instanceof AST_PropAccess || expr instanceof AST_SymbolRef;
+    }
+
+    function to_destructuring(node) {
+        if (node instanceof AST_Object) {
+            node = new AST_Destructuring({
+                start: node.start,
+                names: node.properties.map(to_destructuring),
+                is_array: false,
+                end: node.end
+            });
+        } else if (node instanceof AST_Array) {
+            var names = [];
+
+            for (var i = 0; i < node.elements.length; i++) {
+                // Only allow expansion as last element
+                if (node.elements[i] instanceof AST_Expansion) {
+                    if (i + 1 !== node.elements.length) {
+                        token_error(node.elements[i].start, "Spread must the be last element in destructuring array");
+                    }
+                    node.elements[i].expression = to_destructuring(node.elements[i].expression);
+                }
+
+                names.push(to_destructuring(node.elements[i]));
+            }
+
+            node = new AST_Destructuring({
+                start: node.start,
+                names: names,
+                is_array: true,
+                end: node.end
+            });
+        } else if (node instanceof AST_ObjectProperty) {
+            node.value = to_destructuring(node.value);
+        } else if (node instanceof AST_Assign) {
+            node = new AST_DefaultAssign({
+                start: node.start,
+                left: node.left,
+                operator: "=",
+                right: node.right,
+                end: node.end
+            });
+        }
+        return node;
+    }
+
+    // In ES6, AssignmentExpression can also be an ArrowFunction
+    var maybe_assign = function(no_in) {
+        handle_regexp();
+        var start = S.token;
+
+        if (start.type == "name" && start.value == "yield") {
+            if (is_in_generator()) {
+                next();
+                return _yield_expression();
+            } else if (S.input.has_directive("use strict")) {
+                token_error(S.token, "Unexpected yield identifier inside strict mode");
+            }
+        }
+
+        var left = maybe_conditional(no_in);
+        var val = S.token.value;
+
+        if (is("operator") && ASSIGNMENT.has(val)) {
+            if (is_assignable(left) || (left = to_destructuring(left)) instanceof AST_Destructuring) {
+                next();
+
+                return new AST_Assign({
+                    start    : start,
+                    left     : left,
+                    operator : val,
+                    right    : maybe_assign(no_in),
+                    logical  : LOGICAL_ASSIGNMENT.has(val),
+                    end      : prev()
+                });
+            }
+            croak("Invalid assignment");
+        }
+        return left;
+    };
+
+    var to_expr_or_sequence = function(start, exprs) {
+        if (exprs.length === 1) {
+            return exprs[0];
+        } else if (exprs.length > 1) {
+            return new AST_Sequence({ start, expressions: exprs, end: peek() });
+        } else {
+            croak("Invalid parenthesized expression");
+        }
+    };
+
+    var expression = function(commas, no_in) {
+        var start = S.token;
+        var exprs = [];
+        while (true) {
+            exprs.push(maybe_assign(no_in));
+            if (!commas || !is("punc", ",")) break;
+            next();
+            commas = true;
+        }
+        return to_expr_or_sequence(start, exprs);
+    };
+
+    function in_loop(cont) {
+        ++S.in_loop;
+        var ret = cont();
+        --S.in_loop;
+        return ret;
+    }
+
+    if (options.expression) {
+        return expression(true);
+    }
+
+    return (function parse_toplevel() {
+        var start = S.token;
+        var body = [];
+        S.input.push_directives_stack();
+        if (options.module) S.input.add_directive("use strict");
+        while (!is("eof")) {
+            body.push(statement());
+        }
+        S.input.pop_directives_stack();
+        var end = prev();
+        var toplevel = options.toplevel;
+        if (toplevel) {
+            toplevel.body = toplevel.body.concat(body);
+            toplevel.end = end;
+        } else {
+            toplevel = new AST_Toplevel({ start: start, body: body, end: end });
+        }
+        TEMPLATE_RAWS = new Map();
+        return toplevel;
+    })();
+
+}
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+function DEFNODE(type, props, ctor, methods, base = AST_Node) {
+    if (!props) props = [];
+    else props = props.split(/\s+/);
+    var self_props = props;
+    if (base && base.PROPS)
+        props = props.concat(base.PROPS);
+    const proto = base && Object.create(base.prototype);
+    if (proto) {
+        ctor.prototype = proto;
+        ctor.BASE = base;
+    }
+    if (base) base.SUBCLASSES.push(ctor);
+    ctor.prototype.CTOR = ctor;
+    ctor.prototype.constructor = ctor;
+    ctor.PROPS = props || null;
+    ctor.SELF_PROPS = self_props;
+    ctor.SUBCLASSES = [];
+    if (type) {
+        ctor.prototype.TYPE = ctor.TYPE = type;
+    }
+    if (methods) for (let i in methods) if (HOP(methods, i)) {
+        if (i[0] === "$") {
+            ctor[i.substr(1)] = methods[i];
+        } else {
+            ctor.prototype[i] = methods[i];
+        }
+    }
+    ctor.DEFMETHOD = function(name, method) {
+        this.prototype[name] = method;
+    };
+    return ctor;
+}
+
+const has_tok_flag = (tok, flag) => Boolean(tok.flags & flag);
+const set_tok_flag = (tok, flag, truth) => {
+    if (truth) {
+        tok.flags |= flag;
+    } else {
+        tok.flags &= ~flag;
+    }
+};
+
+const TOK_FLAG_NLB          = 0b0001;
+const TOK_FLAG_QUOTE_SINGLE = 0b0010;
+const TOK_FLAG_QUOTE_EXISTS = 0b0100;
+const TOK_FLAG_TEMPLATE_END = 0b1000;
+
+class AST_Token {
+    constructor(type, value, line, col, pos, nlb, comments_before, comments_after, file) {
+        this.flags = (nlb ? 1 : 0);
+
+        this.type = type;
+        this.value = value;
+        this.line = line;
+        this.col = col;
+        this.pos = pos;
+        this.comments_before = comments_before;
+        this.comments_after = comments_after;
+        this.file = file;
+
+        Object.seal(this);
+    }
+
+    // Return a string summary of the token for node.js console.log
+    [Symbol.for("nodejs.util.inspect.custom")](_depth, options) {
+        const special = str => options.stylize(str, "special");
+        const quote = typeof this.value === "string" && this.value.includes("`") ? "'" : "`";
+        const value = `${quote}${this.value}${quote}`;
+        return `${special("[AST_Token")} ${value} at ${this.line}:${this.col}${special("]")}`;
+    }
+
+    get nlb() {
+        return has_tok_flag(this, TOK_FLAG_NLB);
+    }
+
+    set nlb(new_nlb) {
+        set_tok_flag(this, TOK_FLAG_NLB, new_nlb);
+    }
+
+    get quote() {
+        return !has_tok_flag(this, TOK_FLAG_QUOTE_EXISTS)
+            ? ""
+            : (has_tok_flag(this, TOK_FLAG_QUOTE_SINGLE) ? "'" : '"');
+    }
+
+    set quote(quote_type) {
+        set_tok_flag(this, TOK_FLAG_QUOTE_SINGLE, quote_type === "'");
+        set_tok_flag(this, TOK_FLAG_QUOTE_EXISTS, !!quote_type);
+    }
+
+    get template_end() {
+        return has_tok_flag(this, TOK_FLAG_TEMPLATE_END);
+    }
+
+    set template_end(new_template_end) {
+        set_tok_flag(this, TOK_FLAG_TEMPLATE_END, new_template_end);
+    }
+}
+
+var AST_Node = DEFNODE("Node", "start end", function AST_Node(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    _clone: function(deep) {
+        if (deep) {
+            var self = this.clone();
+            return self.transform(new TreeTransformer(function(node) {
+                if (node !== self) {
+                    return node.clone(true);
+                }
+            }));
+        }
+        return new this.CTOR(this);
+    },
+    clone: function(deep) {
+        return this._clone(deep);
+    },
+    $documentation: "Base class of all AST nodes",
+    $propdoc: {
+        start: "[AST_Token] The first token of this node",
+        end: "[AST_Token] The last token of this node"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this);
+    },
+    walk: function(visitor) {
+        return this._walk(visitor); // not sure the indirection will be any help
+    },
+    _children_backwards: () => {}
+}, null);
+
+/* -----[ statements ]----- */
+
+var AST_Statement = DEFNODE("Statement", null, function AST_Statement(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class of all statements",
+});
+
+var AST_Debugger = DEFNODE("Debugger", null, function AST_Debugger(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Represents a debugger statement",
+}, AST_Statement);
+
+var AST_Directive = DEFNODE("Directive", "value quote", function AST_Directive(props) {
+    if (props) {
+        this.value = props.value;
+        this.quote = props.quote;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Represents a directive, like \"use strict\";",
+    $propdoc: {
+        value: "[string] The value of this directive as a plain string (it's not an AST_String!)",
+        quote: "[string] the original quote character"
+    },
+}, AST_Statement);
+
+var AST_SimpleStatement = DEFNODE("SimpleStatement", "body", function AST_SimpleStatement(props) {
+    if (props) {
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A statement consisting of an expression, i.e. a = 1 + 2",
+    $propdoc: {
+        body: "[AST_Node] an expression node (should not be instanceof AST_Statement)"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.body._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.body);
+    }
+}, AST_Statement);
+
+function walk_body(node, visitor) {
+    const body = node.body;
+    for (var i = 0, len = body.length; i < len; i++) {
+        body[i]._walk(visitor);
+    }
+}
+
+function clone_block_scope(deep) {
+    var clone = this._clone(deep);
+    if (this.block_scope) {
+        clone.block_scope = this.block_scope.clone();
+    }
+    return clone;
+}
+
+var AST_Block = DEFNODE("Block", "body block_scope", function AST_Block(props) {
+    if (props) {
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A body of statements (usually braced)",
+    $propdoc: {
+        body: "[AST_Statement*] an array of statements",
+        block_scope: "[AST_Scope] the block scope"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            walk_body(this, visitor);
+        });
+    },
+    _children_backwards(push) {
+        let i = this.body.length;
+        while (i--) push(this.body[i]);
+    },
+    clone: clone_block_scope
+}, AST_Statement);
+
+var AST_BlockStatement = DEFNODE("BlockStatement", null, function AST_BlockStatement(props) {
+    if (props) {
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A block statement",
+}, AST_Block);
+
+var AST_EmptyStatement = DEFNODE("EmptyStatement", null, function AST_EmptyStatement(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The empty statement (empty block or simply a semicolon)"
+}, AST_Statement);
+
+var AST_StatementWithBody = DEFNODE("StatementWithBody", "body", function AST_StatementWithBody(props) {
+    if (props) {
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for all statements that contain one nested body: `For`, `ForIn`, `Do`, `While`, `With`",
+    $propdoc: {
+        body: "[AST_Statement] the body; this should always be present, even if it's an AST_EmptyStatement"
+    }
+}, AST_Statement);
+
+var AST_LabeledStatement = DEFNODE("LabeledStatement", "label", function AST_LabeledStatement(props) {
+    if (props) {
+        this.label = props.label;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Statement with a label",
+    $propdoc: {
+        label: "[AST_Label] a label definition"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.label._walk(visitor);
+            this.body._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.body);
+        push(this.label);
+    },
+    clone: function(deep) {
+        var node = this._clone(deep);
+        if (deep) {
+            var label = node.label;
+            var def = this.label;
+            node.walk(new TreeWalker(function(node) {
+                if (node instanceof AST_LoopControl
+                    && node.label && node.label.thedef === def) {
+                    node.label.thedef = label;
+                    label.references.push(node);
+                }
+            }));
+        }
+        return node;
+    }
+}, AST_StatementWithBody);
+
+var AST_IterationStatement = DEFNODE(
+    "IterationStatement",
+    "block_scope",
+    function AST_IterationStatement(props) {
+        if (props) {
+            this.block_scope = props.block_scope;
+            this.body = props.body;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "Internal class.  All loops inherit from it.",
+        $propdoc: {
+            block_scope: "[AST_Scope] the block scope for this iteration statement."
+        },
+        clone: clone_block_scope
+    },
+    AST_StatementWithBody
+);
+
+var AST_DWLoop = DEFNODE("DWLoop", "condition", function AST_DWLoop(props) {
+    if (props) {
+        this.condition = props.condition;
+        this.block_scope = props.block_scope;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for do/while statements",
+    $propdoc: {
+        condition: "[AST_Node] the loop condition.  Should not be instanceof AST_Statement"
+    }
+}, AST_IterationStatement);
+
+var AST_Do = DEFNODE("Do", null, function AST_Do(props) {
+    if (props) {
+        this.condition = props.condition;
+        this.block_scope = props.block_scope;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `do` statement",
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.body._walk(visitor);
+            this.condition._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.condition);
+        push(this.body);
+    }
+}, AST_DWLoop);
+
+var AST_While = DEFNODE("While", null, function AST_While(props) {
+    if (props) {
+        this.condition = props.condition;
+        this.block_scope = props.block_scope;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `while` statement",
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.condition._walk(visitor);
+            this.body._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.body);
+        push(this.condition);
+    },
+}, AST_DWLoop);
+
+var AST_For = DEFNODE("For", "init condition step", function AST_For(props) {
+    if (props) {
+        this.init = props.init;
+        this.condition = props.condition;
+        this.step = props.step;
+        this.block_scope = props.block_scope;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `for` statement",
+    $propdoc: {
+        init: "[AST_Node?] the `for` initialization code, or null if empty",
+        condition: "[AST_Node?] the `for` termination clause, or null if empty",
+        step: "[AST_Node?] the `for` update clause, or null if empty"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            if (this.init) this.init._walk(visitor);
+            if (this.condition) this.condition._walk(visitor);
+            if (this.step) this.step._walk(visitor);
+            this.body._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.body);
+        if (this.step) push(this.step);
+        if (this.condition) push(this.condition);
+        if (this.init) push(this.init);
+    },
+}, AST_IterationStatement);
+
+var AST_ForIn = DEFNODE("ForIn", "init object", function AST_ForIn(props) {
+    if (props) {
+        this.init = props.init;
+        this.object = props.object;
+        this.block_scope = props.block_scope;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `for ... in` statement",
+    $propdoc: {
+        init: "[AST_Node] the `for/in` initialization code",
+        object: "[AST_Node] the object that we're looping through"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.init._walk(visitor);
+            this.object._walk(visitor);
+            this.body._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.body);
+        if (this.object) push(this.object);
+        if (this.init) push(this.init);
+    },
+}, AST_IterationStatement);
+
+var AST_ForOf = DEFNODE("ForOf", "await", function AST_ForOf(props) {
+    if (props) {
+        this.await = props.await;
+        this.init = props.init;
+        this.object = props.object;
+        this.block_scope = props.block_scope;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `for ... of` statement",
+}, AST_ForIn);
+
+var AST_With = DEFNODE("With", "expression", function AST_With(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `with` statement",
+    $propdoc: {
+        expression: "[AST_Node] the `with` expression"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+            this.body._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.body);
+        push(this.expression);
+    },
+}, AST_StatementWithBody);
+
+/* -----[ scope and functions ]----- */
+
+var AST_Scope = DEFNODE(
+    "Scope",
+    "variables uses_with uses_eval parent_scope enclosed cname",
+    function AST_Scope(props) {
+        if (props) {
+            this.variables = props.variables;
+            this.uses_with = props.uses_with;
+            this.uses_eval = props.uses_eval;
+            this.parent_scope = props.parent_scope;
+            this.enclosed = props.enclosed;
+            this.cname = props.cname;
+            this.body = props.body;
+            this.block_scope = props.block_scope;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "Base class for all statements introducing a lexical scope",
+        $propdoc: {
+            variables: "[Map/S] a map of name -> SymbolDef for all variables/functions defined in this scope",
+            uses_with: "[boolean/S] tells whether this scope uses the `with` statement",
+            uses_eval: "[boolean/S] tells whether this scope contains a direct call to the global `eval`",
+            parent_scope: "[AST_Scope?/S] link to the parent scope",
+            enclosed: "[SymbolDef*/S] a list of all symbol definitions that are accessed from this scope or any subscopes",
+            cname: "[integer/S] current index for mangling variables (used internally by the mangler)",
+        },
+        get_defun_scope: function() {
+            var self = this;
+            while (self.is_block_scope()) {
+                self = self.parent_scope;
+            }
+            return self;
+        },
+        clone: function(deep, toplevel) {
+            var node = this._clone(deep);
+            if (deep && this.variables && toplevel && !this._block_scope) {
+                node.figure_out_scope({}, {
+                    toplevel: toplevel,
+                    parent_scope: this.parent_scope
+                });
+            } else {
+                if (this.variables) node.variables = new Map(this.variables);
+                if (this.enclosed) node.enclosed = this.enclosed.slice();
+                if (this._block_scope) node._block_scope = this._block_scope;
+            }
+            return node;
+        },
+        pinned: function() {
+            return this.uses_eval || this.uses_with;
+        }
+    },
+    AST_Block
+);
+
+var AST_Toplevel = DEFNODE("Toplevel", "globals", function AST_Toplevel(props) {
+    if (props) {
+        this.globals = props.globals;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The toplevel scope",
+    $propdoc: {
+        globals: "[Map/S] a map of name -> SymbolDef for all undeclared names",
+    },
+    wrap_commonjs: function(name) {
+        var body = this.body;
+        var wrapped_tl = "(function(exports){'$ORIG';})(typeof " + name + "=='undefined'?(" + name + "={}):" + name + ");";
+        wrapped_tl = parse(wrapped_tl);
+        wrapped_tl = wrapped_tl.transform(new TreeTransformer(function(node) {
+            if (node instanceof AST_Directive && node.value == "$ORIG") {
+                return MAP.splice(body);
+            }
+        }));
+        return wrapped_tl;
+    },
+    wrap_enclose: function(args_values) {
+        if (typeof args_values != "string") args_values = "";
+        var index = args_values.indexOf(":");
+        if (index < 0) index = args_values.length;
+        var body = this.body;
+        return parse([
+            "(function(",
+            args_values.slice(0, index),
+            '){"$ORIG"})(',
+            args_values.slice(index + 1),
+            ")"
+        ].join("")).transform(new TreeTransformer(function(node) {
+            if (node instanceof AST_Directive && node.value == "$ORIG") {
+                return MAP.splice(body);
+            }
+        }));
+    }
+}, AST_Scope);
+
+var AST_Expansion = DEFNODE("Expansion", "expression", function AST_Expansion(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An expandible argument, such as ...rest, a splat, such as [1,2,...all], or an expansion in a variable declaration, such as var [first, ...rest] = list",
+    $propdoc: {
+        expression: "[AST_Node] the thing to be expanded"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression.walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.expression);
+    },
+});
+
+var AST_Lambda = DEFNODE(
+    "Lambda",
+    "name argnames uses_arguments is_generator async",
+    function AST_Lambda(props) {
+        if (props) {
+            this.name = props.name;
+            this.argnames = props.argnames;
+            this.uses_arguments = props.uses_arguments;
+            this.is_generator = props.is_generator;
+            this.async = props.async;
+            this.variables = props.variables;
+            this.uses_with = props.uses_with;
+            this.uses_eval = props.uses_eval;
+            this.parent_scope = props.parent_scope;
+            this.enclosed = props.enclosed;
+            this.cname = props.cname;
+            this.body = props.body;
+            this.block_scope = props.block_scope;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "Base class for functions",
+        $propdoc: {
+            name: "[AST_SymbolDeclaration?] the name of this function",
+            argnames: "[AST_SymbolFunarg|AST_Destructuring|AST_Expansion|AST_DefaultAssign*] array of function arguments, destructurings, or expanding arguments",
+            uses_arguments: "[boolean/S] tells whether this function accesses the arguments array",
+            is_generator: "[boolean] is this a generator method",
+            async: "[boolean] is this method async",
+        },
+        args_as_names: function () {
+            var out = [];
+            for (var i = 0; i < this.argnames.length; i++) {
+                if (this.argnames[i] instanceof AST_Destructuring) {
+                    out.push(...this.argnames[i].all_symbols());
+                } else {
+                    out.push(this.argnames[i]);
+                }
+            }
+            return out;
+        },
+        _walk: function(visitor) {
+            return visitor._visit(this, function() {
+                if (this.name) this.name._walk(visitor);
+                var argnames = this.argnames;
+                for (var i = 0, len = argnames.length; i < len; i++) {
+                    argnames[i]._walk(visitor);
+                }
+                walk_body(this, visitor);
+            });
+        },
+        _children_backwards(push) {
+            let i = this.body.length;
+            while (i--) push(this.body[i]);
+
+            i = this.argnames.length;
+            while (i--) push(this.argnames[i]);
+
+            if (this.name) push(this.name);
+        },
+        is_braceless() {
+            return this.body[0] instanceof AST_Return && this.body[0].value;
+        },
+        // Default args and expansion don't count, so .argnames.length doesn't cut it
+        length_property() {
+            let length = 0;
+
+            for (const arg of this.argnames) {
+                if (arg instanceof AST_SymbolFunarg || arg instanceof AST_Destructuring) {
+                    length++;
+                }
+            }
+
+            return length;
+        }
+    },
+    AST_Scope
+);
+
+var AST_Accessor = DEFNODE("Accessor", null, function AST_Accessor(props) {
+    if (props) {
+        this.name = props.name;
+        this.argnames = props.argnames;
+        this.uses_arguments = props.uses_arguments;
+        this.is_generator = props.is_generator;
+        this.async = props.async;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A setter/getter function.  The `name` property is always null."
+}, AST_Lambda);
+
+var AST_Function = DEFNODE("Function", null, function AST_Function(props) {
+    if (props) {
+        this.name = props.name;
+        this.argnames = props.argnames;
+        this.uses_arguments = props.uses_arguments;
+        this.is_generator = props.is_generator;
+        this.async = props.async;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A function expression"
+}, AST_Lambda);
+
+var AST_Arrow = DEFNODE("Arrow", null, function AST_Arrow(props) {
+    if (props) {
+        this.name = props.name;
+        this.argnames = props.argnames;
+        this.uses_arguments = props.uses_arguments;
+        this.is_generator = props.is_generator;
+        this.async = props.async;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An ES6 Arrow function ((a) => b)"
+}, AST_Lambda);
+
+var AST_Defun = DEFNODE("Defun", null, function AST_Defun(props) {
+    if (props) {
+        this.name = props.name;
+        this.argnames = props.argnames;
+        this.uses_arguments = props.uses_arguments;
+        this.is_generator = props.is_generator;
+        this.async = props.async;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A function definition"
+}, AST_Lambda);
+
+/* -----[ DESTRUCTURING ]----- */
+var AST_Destructuring = DEFNODE("Destructuring", "names is_array", function AST_Destructuring(props) {
+    if (props) {
+        this.names = props.names;
+        this.is_array = props.is_array;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A destructuring of several names. Used in destructuring assignment and with destructuring function argument names",
+    $propdoc: {
+        "names": "[AST_Node*] Array of properties or elements",
+        "is_array": "[Boolean] Whether the destructuring represents an object or array"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.names.forEach(function(name) {
+                name._walk(visitor);
+            });
+        });
+    },
+    _children_backwards(push) {
+        let i = this.names.length;
+        while (i--) push(this.names[i]);
+    },
+    all_symbols: function() {
+        var out = [];
+        walk(this, node => {
+            if (node instanceof AST_SymbolDeclaration) {
+                out.push(node);
+            }
+            if (node instanceof AST_Lambda) {
+                return true;
+            }
+        });
+        return out;
+    }
+});
+
+var AST_PrefixedTemplateString = DEFNODE(
+    "PrefixedTemplateString",
+    "template_string prefix",
+    function AST_PrefixedTemplateString(props) {
+        if (props) {
+            this.template_string = props.template_string;
+            this.prefix = props.prefix;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "A templatestring with a prefix, such as String.raw`foobarbaz`",
+        $propdoc: {
+            template_string: "[AST_TemplateString] The template string",
+            prefix: "[AST_Node] The prefix, which will get called."
+        },
+        _walk: function(visitor) {
+            return visitor._visit(this, function () {
+                this.prefix._walk(visitor);
+                this.template_string._walk(visitor);
+            });
+        },
+        _children_backwards(push) {
+            push(this.template_string);
+            push(this.prefix);
+        },
+    }
+);
+
+var AST_TemplateString = DEFNODE("TemplateString", "segments", function AST_TemplateString(props) {
+    if (props) {
+        this.segments = props.segments;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A template string literal",
+    $propdoc: {
+        segments: "[AST_Node*] One or more segments, starting with AST_TemplateSegment. AST_Node may follow AST_TemplateSegment, but each AST_Node must be followed by AST_TemplateSegment."
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.segments.forEach(function(seg) {
+                seg._walk(visitor);
+            });
+        });
+    },
+    _children_backwards(push) {
+        let i = this.segments.length;
+        while (i--) push(this.segments[i]);
+    }
+});
+
+var AST_TemplateSegment = DEFNODE("TemplateSegment", "value raw", function AST_TemplateSegment(props) {
+    if (props) {
+        this.value = props.value;
+        this.raw = props.raw;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A segment of a template string literal",
+    $propdoc: {
+        value: "Content of the segment",
+        raw: "Raw source of the segment",
+    }
+});
+
+/* -----[ JUMPS ]----- */
+
+var AST_Jump = DEFNODE("Jump", null, function AST_Jump(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for “jumps” (for now that's `return`, `throw`, `break` and `continue`)"
+}, AST_Statement);
+
+/** Base class for “exits” (`return` and `throw`) */
+var AST_Exit = DEFNODE("Exit", "value", function AST_Exit(props) {
+    if (props) {
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for “exits” (`return` and `throw`)",
+    $propdoc: {
+        value: "[AST_Node?] the value returned or thrown by this statement; could be null for AST_Return"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, this.value && function() {
+            this.value._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.value) push(this.value);
+    },
+}, AST_Jump);
+
+var AST_Return = DEFNODE("Return", null, function AST_Return(props) {
+    if (props) {
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `return` statement"
+}, AST_Exit);
+
+var AST_Throw = DEFNODE("Throw", null, function AST_Throw(props) {
+    if (props) {
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `throw` statement"
+}, AST_Exit);
+
+var AST_LoopControl = DEFNODE("LoopControl", "label", function AST_LoopControl(props) {
+    if (props) {
+        this.label = props.label;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for loop control statements (`break` and `continue`)",
+    $propdoc: {
+        label: "[AST_LabelRef?] the label, or null if none",
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, this.label && function() {
+            this.label._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.label) push(this.label);
+    },
+}, AST_Jump);
+
+var AST_Break = DEFNODE("Break", null, function AST_Break(props) {
+    if (props) {
+        this.label = props.label;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `break` statement"
+}, AST_LoopControl);
+
+var AST_Continue = DEFNODE("Continue", null, function AST_Continue(props) {
+    if (props) {
+        this.label = props.label;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `continue` statement"
+}, AST_LoopControl);
+
+var AST_Await = DEFNODE("Await", "expression", function AST_Await(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An `await` statement",
+    $propdoc: {
+        expression: "[AST_Node] the mandatory expression being awaited",
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.expression);
+    },
+});
+
+var AST_Yield = DEFNODE("Yield", "expression is_star", function AST_Yield(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.is_star = props.is_star;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `yield` statement",
+    $propdoc: {
+        expression: "[AST_Node?] the value returned or thrown by this statement; could be null (representing undefined) but only when is_star is set to false",
+        is_star: "[Boolean] Whether this is a yield or yield* statement"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, this.expression && function() {
+            this.expression._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.expression) push(this.expression);
+    }
+});
+
+/* -----[ IF ]----- */
+
+var AST_If = DEFNODE("If", "condition alternative", function AST_If(props) {
+    if (props) {
+        this.condition = props.condition;
+        this.alternative = props.alternative;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `if` statement",
+    $propdoc: {
+        condition: "[AST_Node] the `if` condition",
+        alternative: "[AST_Statement?] the `else` part, or null if not present"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.condition._walk(visitor);
+            this.body._walk(visitor);
+            if (this.alternative) this.alternative._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.alternative) {
+            push(this.alternative);
+        }
+        push(this.body);
+        push(this.condition);
+    }
+}, AST_StatementWithBody);
+
+/* -----[ SWITCH ]----- */
+
+var AST_Switch = DEFNODE("Switch", "expression", function AST_Switch(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `switch` statement",
+    $propdoc: {
+        expression: "[AST_Node] the `switch` “discriminant”"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+            walk_body(this, visitor);
+        });
+    },
+    _children_backwards(push) {
+        let i = this.body.length;
+        while (i--) push(this.body[i]);
+        push(this.expression);
+    }
+}, AST_Block);
+
+var AST_SwitchBranch = DEFNODE("SwitchBranch", null, function AST_SwitchBranch(props) {
+    if (props) {
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for `switch` branches",
+}, AST_Block);
+
+var AST_Default = DEFNODE("Default", null, function AST_Default(props) {
+    if (props) {
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `default` switch branch",
+}, AST_SwitchBranch);
+
+var AST_Case = DEFNODE("Case", "expression", function AST_Case(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `case` switch branch",
+    $propdoc: {
+        expression: "[AST_Node] the `case` expression"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+            walk_body(this, visitor);
+        });
+    },
+    _children_backwards(push) {
+        let i = this.body.length;
+        while (i--) push(this.body[i]);
+        push(this.expression);
+    },
+}, AST_SwitchBranch);
+
+/* -----[ EXCEPTIONS ]----- */
+
+var AST_Try = DEFNODE("Try", "body bcatch bfinally", function AST_Try(props) {
+    if (props) {
+        this.body = props.body;
+        this.bcatch = props.bcatch;
+        this.bfinally = props.bfinally;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `try` statement",
+    $propdoc: {
+        body: "[AST_TryBlock] the try block",
+        bcatch: "[AST_Catch?] the catch block, or null if not present",
+        bfinally: "[AST_Finally?] the finally block, or null if not present"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.body._walk(visitor);
+            if (this.bcatch) this.bcatch._walk(visitor);
+            if (this.bfinally) this.bfinally._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.bfinally) push(this.bfinally);
+        if (this.bcatch) push(this.bcatch);
+        push(this.body);
+    },
+}, AST_Statement);
+
+var AST_TryBlock = DEFNODE("TryBlock", null, function AST_TryBlock(props) {
+    if (props) {
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `try` block of a try statement"
+}, AST_Block);
+
+var AST_Catch = DEFNODE("Catch", "argname", function AST_Catch(props) {
+    if (props) {
+        this.argname = props.argname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `catch` node; only makes sense as part of a `try` statement",
+    $propdoc: {
+        argname: "[AST_SymbolCatch|AST_Destructuring|AST_Expansion|AST_DefaultAssign] symbol for the exception"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            if (this.argname) this.argname._walk(visitor);
+            walk_body(this, visitor);
+        });
+    },
+    _children_backwards(push) {
+        let i = this.body.length;
+        while (i--) push(this.body[i]);
+        if (this.argname) push(this.argname);
+    },
+}, AST_Block);
+
+var AST_Finally = DEFNODE("Finally", null, function AST_Finally(props) {
+    if (props) {
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `finally` node; only makes sense as part of a `try` statement"
+}, AST_Block);
+
+/* -----[ VAR/CONST ]----- */
+
+var AST_DefinitionsLike = DEFNODE("DefinitionsLike", "definitions", function AST_DefinitionsLike(props) {
+    if (props) {
+        this.definitions = props.definitions;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for variable definitions and `using`",
+    $propdoc: {
+        definitions: "[AST_VarDef*|AST_UsingDef*] array of variable definitions"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            var definitions = this.definitions;
+            for (var i = 0, len = definitions.length; i < len; i++) {
+                definitions[i]._walk(visitor);
+            }
+        });
+    },
+    _children_backwards(push) {
+        let i = this.definitions.length;
+        while (i--) push(this.definitions[i]);
+    },
+}, AST_Statement);
+
+var AST_Definitions = DEFNODE("Definitions", null, function AST_Definitions(props) {
+    if (props) {
+        this.definitions = props.definitions;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for `var` or `const` nodes (variable declarations/initializations)",
+}, AST_DefinitionsLike);
+
+var AST_Var = DEFNODE("Var", null, function AST_Var(props) {
+    if (props) {
+        this.definitions = props.definitions;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `var` statement"
+}, AST_Definitions);
+
+var AST_Let = DEFNODE("Let", null, function AST_Let(props) {
+    if (props) {
+        this.definitions = props.definitions;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `let` statement"
+}, AST_Definitions);
+
+var AST_Const = DEFNODE("Const", null, function AST_Const(props) {
+    if (props) {
+        this.definitions = props.definitions;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `const` statement"
+}, AST_Definitions);
+
+var AST_Using = DEFNODE("Using", "await", function AST_Using(props) {
+    if (props) {
+        this.await = props.await;
+        this.definitions = props.definitions;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `using` statement",
+    $propdoc: {
+        await: "[boolean] Whether it's `await using`"
+    },
+}, AST_DefinitionsLike);
+
+var AST_VarDefLike = DEFNODE("VarDefLike", "name value", function AST_VarDefLike(props) {
+    if (props) {
+        this.name = props.name;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A name=value pair in a variable definition statement or `using`",
+    $propdoc: {
+        name: "[AST_Destructuring|AST_SymbolDeclaration] name of the variable",
+        value: "[AST_Node?] initializer, or null of there's no initializer"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.name._walk(visitor);
+            if (this.value) this.value._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.value) push(this.value);
+        push(this.name);
+    },
+    declarations_as_names() {
+        if (this.name instanceof AST_SymbolDeclaration) {
+            return [this.name];
+        } else {
+            return this.name.all_symbols();
+        }
+    }
+});
+
+var AST_VarDef = DEFNODE("VarDef", null, function AST_VarDef(props) {
+    if (props) {
+        this.name = props.name;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A variable declaration; only appears in a AST_Definitions node",
+}, AST_VarDefLike);
+
+var AST_UsingDef = DEFNODE("UsingDef", null, function AST_UsingDef(props) {
+    if (props) {
+        this.name = props.name;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Like VarDef but specific to AST_Using",
+}, AST_VarDefLike);
+
+var AST_NameMapping = DEFNODE("NameMapping", "foreign_name name", function AST_NameMapping(props) {
+    if (props) {
+        this.foreign_name = props.foreign_name;
+        this.name = props.name;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The part of the export/import statement that declare names from a module.",
+    $propdoc: {
+        foreign_name: "[AST_SymbolExportForeign|AST_SymbolImportForeign] The name being exported/imported (as specified in the module)",
+        name: "[AST_SymbolExport|AST_SymbolImport] The name as it is visible to this module."
+    },
+    _walk: function (visitor) {
+        return visitor._visit(this, function() {
+            this.foreign_name._walk(visitor);
+            this.name._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.name);
+        push(this.foreign_name);
+    },
+});
+
+var AST_Import = DEFNODE(
+    "Import",
+    "phase imported_name imported_names module_name attributes",
+    function AST_Import(props) {
+        if (props) {
+            this.phase = props.phase;
+            this.imported_name = props.imported_name;
+            this.imported_names = props.imported_names;
+            this.module_name = props.module_name;
+            this.attributes = props.attributes;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "An `import` statement",
+        $propdoc: {
+            phase: "[string?] Phase keyword: 'source', 'defer', or null.",
+            imported_name: "[AST_SymbolImport] The name of the variable holding the module's default export.",
+            imported_names: "[AST_NameMapping*] The names of non-default imported variables",
+            module_name: "[AST_String] String literal describing where this module came from",
+            attributes: "[AST_Object?] The import attributes (with {...})"
+        },
+        _walk: function(visitor) {
+            return visitor._visit(this, function() {
+                if (this.imported_name) {
+                    this.imported_name._walk(visitor);
+                }
+                if (this.imported_names) {
+                    this.imported_names.forEach(function(name_import) {
+                        name_import._walk(visitor);
+                    });
+                }
+                this.module_name._walk(visitor);
+            });
+        },
+        _children_backwards(push) {
+            push(this.module_name);
+            if (this.imported_names) {
+                let i = this.imported_names.length;
+                while (i--) push(this.imported_names[i]);
+            }
+            if (this.imported_name) push(this.imported_name);
+        },
+    }
+);
+
+var AST_ImportMeta = DEFNODE("ImportMeta", null, function AST_ImportMeta(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A reference to import.meta",
+});
+
+var AST_DynamicImport = DEFNODE(
+    "DynamicImport",
+    "phase args",
+    function AST_DynamicImport(props) {
+        if (props) {
+            this.phase = props.phase;
+            this.args = props.args;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "A phased dynamic import expression: `import.source(specifier [, options])` or `import.defer(specifier [, options])`. Plain `import(x)` continues to be parsed as an AST_Call with a synthetic `import` SymbolRef callee.",
+        $propdoc: {
+            phase: "[string] Phase keyword ('source' or 'defer').",
+            args: "[AST_Node*] specifier followed by optional options argument"
+        },
+        _walk: function(visitor) {
+            return visitor._visit(this, function() {
+                var args = this.args;
+                for (var i = 0, len = args.length; i < len; i++) {
+                    args[i]._walk(visitor);
+                }
+            });
+        },
+        _children_backwards(push) {
+            let i = this.args.length;
+            while (i--) push(this.args[i]);
+        },
+    }
+);
+
+var AST_Export = DEFNODE(
+    "Export",
+    "exported_definition exported_value is_default exported_names module_name attributes",
+    function AST_Export(props) {
+        if (props) {
+            this.exported_definition = props.exported_definition;
+            this.exported_value = props.exported_value;
+            this.is_default = props.is_default;
+            this.exported_names = props.exported_names;
+            this.module_name = props.module_name;
+            this.attributes = props.attributes;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "An `export` statement",
+        $propdoc: {
+            exported_definition: "[AST_Defun|AST_Definitions|AST_DefClass?] An exported definition",
+            exported_value: "[AST_Node?] An exported value",
+            exported_names: "[AST_NameMapping*?] List of exported names",
+            module_name: "[AST_String?] Name of the file to load exports from",
+            is_default: "[Boolean] Whether this is the default exported value of this module",
+            attributes: "[AST_Object?] The import attributes"
+        },
+        _walk: function (visitor) {
+            return visitor._visit(this, function () {
+                if (this.exported_definition) {
+                    this.exported_definition._walk(visitor);
+                }
+                if (this.exported_value) {
+                    this.exported_value._walk(visitor);
+                }
+                if (this.exported_names) {
+                    this.exported_names.forEach(function(name_export) {
+                        name_export._walk(visitor);
+                    });
+                }
+                if (this.module_name) {
+                    this.module_name._walk(visitor);
+                }
+            });
+        },
+        _children_backwards(push) {
+            if (this.module_name) push(this.module_name);
+            if (this.exported_names) {
+                let i = this.exported_names.length;
+                while (i--) push(this.exported_names[i]);
+            }
+            if (this.exported_value) push(this.exported_value);
+            if (this.exported_definition) push(this.exported_definition);
+        }
+    },
+    AST_Statement
+);
+
+/* -----[ OTHER ]----- */
+
+var AST_Call = DEFNODE(
+    "Call",
+    "expression args optional _annotations",
+    function AST_Call(props) {
+        if (props) {
+            this.expression = props.expression;
+            this.args = props.args;
+            this.optional = props.optional;
+            this._annotations = props._annotations;
+            this.start = props.start;
+            this.end = props.end;
+            this.initialize();
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "A function call expression",
+        $propdoc: {
+            expression: "[AST_Node] expression to invoke as function",
+            args: "[AST_Node*] array of arguments",
+            optional: "[boolean] whether this is an optional call (IE ?.() )",
+            _annotations: "[number] bitfield containing information about the call"
+        },
+        initialize() {
+            if (this._annotations == null) this._annotations = 0;
+        },
+        _walk(visitor) {
+            return visitor._visit(this, function() {
+                var args = this.args;
+                for (var i = 0, len = args.length; i < len; i++) {
+                    args[i]._walk(visitor);
+                }
+                this.expression._walk(visitor);  // TODO why do we need to crawl this last?
+            });
+        },
+        _children_backwards(push) {
+            let i = this.args.length;
+            while (i--) push(this.args[i]);
+            push(this.expression);
+        },
+    }
+);
+
+var AST_New = DEFNODE("New", null, function AST_New(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.args = props.args;
+        this.optional = props.optional;
+        this._annotations = props._annotations;
+        this.start = props.start;
+        this.end = props.end;
+        this.initialize();
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An object instantiation.  Derives from a function call since it has exactly the same properties"
+}, AST_Call);
+
+var AST_Sequence = DEFNODE("Sequence", "expressions", function AST_Sequence(props) {
+    if (props) {
+        this.expressions = props.expressions;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A sequence expression (comma-separated expressions)",
+    $propdoc: {
+        expressions: "[AST_Node*] array of expressions (at least two)"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expressions.forEach(function(node) {
+                node._walk(visitor);
+            });
+        });
+    },
+    _children_backwards(push) {
+        let i = this.expressions.length;
+        while (i--) push(this.expressions[i]);
+    },
+});
+
+var AST_PropAccess = DEFNODE(
+    "PropAccess",
+    "expression property optional",
+    function AST_PropAccess(props) {
+        if (props) {
+            this.expression = props.expression;
+            this.property = props.property;
+            this.optional = props.optional;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "Base class for property access expressions, i.e. `a.foo` or `a[\"foo\"]`",
+        $propdoc: {
+            expression: "[AST_Node] the “container” expression",
+            property: "[AST_Node|string] the property to access.  For AST_Dot & AST_DotHash this is always a plain string, while for AST_Sub it's an arbitrary AST_Node",
+
+            optional: "[boolean] whether this is an optional property access (IE ?.)"
+        }
+    }
+);
+
+var AST_Dot = DEFNODE("Dot", "quote", function AST_Dot(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.expression = props.expression;
+        this.property = props.property;
+        this.optional = props.optional;
+        this._annotations = props._annotations;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A dotted property access expression",
+    $propdoc: {
+        quote: "[string] the original quote character when transformed from AST_Sub",
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.expression);
+    },
+}, AST_PropAccess);
+
+var AST_DotHash = DEFNODE("DotHash", "", function AST_DotHash(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.property = props.property;
+        this.optional = props.optional;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A dotted property access to a private property",
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.expression);
+    },
+}, AST_PropAccess);
+
+var AST_Sub = DEFNODE("Sub", null, function AST_Sub(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.property = props.property;
+        this.optional = props.optional;
+        this._annotations = props._annotations;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Index-style property access, i.e. `a[\"foo\"]`",
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+            this.property._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.property);
+        push(this.expression);
+    },
+}, AST_PropAccess);
+
+var AST_Chain = DEFNODE("Chain", "expression", function AST_Chain(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A chain expression like a?.b?.(c)?.[d]",
+    $propdoc: {
+        expression: "[AST_Call|AST_Dot|AST_DotHash|AST_Sub] chain element."
+    },
+    _walk: function (visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.expression);
+    },
+});
+
+var AST_Unary = DEFNODE("Unary", "operator expression", function AST_Unary(props) {
+    if (props) {
+        this.operator = props.operator;
+        this.expression = props.expression;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for unary expressions",
+    $propdoc: {
+        operator: "[string] the operator",
+        expression: "[AST_Node] expression that this unary operator applies to"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.expression);
+    },
+});
+
+var AST_UnaryPrefix = DEFNODE("UnaryPrefix", null, function AST_UnaryPrefix(props) {
+    if (props) {
+        this.operator = props.operator;
+        this.expression = props.expression;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Unary prefix expression, i.e. `typeof i` or `++i`"
+}, AST_Unary);
+
+var AST_UnaryPostfix = DEFNODE("UnaryPostfix", null, function AST_UnaryPostfix(props) {
+    if (props) {
+        this.operator = props.operator;
+        this.expression = props.expression;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Unary postfix expression, i.e. `i++`"
+}, AST_Unary);
+
+var AST_Binary = DEFNODE("Binary", "operator left right", function AST_Binary(props) {
+    if (props) {
+        this.operator = props.operator;
+        this.left = props.left;
+        this.right = props.right;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Binary expression, i.e. `a + b`",
+    $propdoc: {
+        left: "[AST_Node] left-hand side expression",
+        operator: "[string] the operator",
+        right: "[AST_Node] right-hand side expression"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.left._walk(visitor);
+            this.right._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.right);
+        push(this.left);
+    },
+});
+
+var AST_Conditional = DEFNODE(
+    "Conditional",
+    "condition consequent alternative",
+    function AST_Conditional(props) {
+        if (props) {
+            this.condition = props.condition;
+            this.consequent = props.consequent;
+            this.alternative = props.alternative;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "Conditional expression using the ternary operator, i.e. `a ? b : c`",
+        $propdoc: {
+            condition: "[AST_Node]",
+            consequent: "[AST_Node]",
+            alternative: "[AST_Node]"
+        },
+        _walk: function(visitor) {
+            return visitor._visit(this, function() {
+                this.condition._walk(visitor);
+                this.consequent._walk(visitor);
+                this.alternative._walk(visitor);
+            });
+        },
+        _children_backwards(push) {
+            push(this.alternative);
+            push(this.consequent);
+            push(this.condition);
+        },
+    }
+);
+
+var AST_Assign = DEFNODE("Assign", "logical", function AST_Assign(props) {
+    if (props) {
+        this.logical = props.logical;
+        this.operator = props.operator;
+        this.left = props.left;
+        this.right = props.right;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An assignment expression — `a = b + 5`",
+    $propdoc: {
+        logical: "Whether it's a logical assignment"
+    }
+}, AST_Binary);
+
+var AST_DefaultAssign = DEFNODE("DefaultAssign", null, function AST_DefaultAssign(props) {
+    if (props) {
+        this.operator = props.operator;
+        this.left = props.left;
+        this.right = props.right;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A default assignment expression like in `(a = 3) => a`"
+}, AST_Binary);
+
+/* -----[ LITERALS ]----- */
+
+var AST_Array = DEFNODE("Array", "elements", function AST_Array(props) {
+    if (props) {
+        this.elements = props.elements;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An array literal",
+    $propdoc: {
+        elements: "[AST_Node*] array of elements"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            var elements = this.elements;
+            for (var i = 0, len = elements.length; i < len; i++) {
+                elements[i]._walk(visitor);
+            }
+        });
+    },
+    _children_backwards(push) {
+        let i = this.elements.length;
+        while (i--) push(this.elements[i]);
+    },
+});
+
+var AST_Object = DEFNODE("Object", "properties", function AST_Object(props) {
+    if (props) {
+        this.properties = props.properties;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An object literal",
+    $propdoc: {
+        properties: "[AST_ObjectProperty*] array of properties"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            var properties = this.properties;
+            for (var i = 0, len = properties.length; i < len; i++) {
+                properties[i]._walk(visitor);
+            }
+        });
+    },
+    _children_backwards(push) {
+        let i = this.properties.length;
+        while (i--) push(this.properties[i]);
+    },
+});
+
+/* -----[ OBJECT/CLASS PROPERTIES ]----- */
+
+/**
+ * Everything inside the curly braces of an object/class is a subclass of AST_ObjectProperty, except for AST_ClassStaticBlock.
+ **/
+var AST_ObjectProperty = DEFNODE("ObjectProperty", "key value", function AST_ObjectProperty(props) {
+    if (props) {
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+        this._annotations = props._annotations;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for literal object properties",
+    $propdoc: {
+        key: "[string|AST_Node] property name. For ObjectKeyVal this is a string. For getters, setters and computed property this is an AST_Node.",
+        value: "[AST_Node] property value.  For getters, setters and methods this is an AST_Accessor."
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            if (this.key instanceof AST_Node)
+                this.key._walk(visitor);
+            this.value._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.value);
+        if (this.key instanceof AST_Node) push(this.key);
+    },
+});
+
+var AST_ObjectKeyVal = DEFNODE("ObjectKeyVal", "quote", function AST_ObjectKeyVal(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+        this._annotations = props._annotations;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A key: value object property",
+    $propdoc: {
+        quote: "[string] the original quote character"
+    },
+    computed_key() {
+        return this.key instanceof AST_Node;
+    }
+}, AST_ObjectProperty);
+
+var AST_PrivateSetter = DEFNODE("PrivateSetter", "static", function AST_PrivateSetter(props) {
+    if (props) {
+        this.static = props.static;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $propdoc: {
+        static: "[boolean] whether this is a static private setter"
+    },
+    $documentation: "A private setter property",
+    computed_key() {
+        return false;
+    }
+}, AST_ObjectProperty);
+
+var AST_PrivateGetter = DEFNODE("PrivateGetter", "static", function AST_PrivateGetter(props) {
+    if (props) {
+        this.static = props.static;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $propdoc: {
+        static: "[boolean] whether this is a static private getter"
+    },
+    $documentation: "A private getter property",
+    computed_key() {
+        return false;
+    }
+}, AST_ObjectProperty);
+
+var AST_ObjectSetter = DEFNODE("ObjectSetter", "quote static", function AST_ObjectSetter(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.static = props.static;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+        this._annotations = props._annotations;
+    }
+
+    this.flags = 0;
+}, {
+    $propdoc: {
+        quote: "[string|undefined] the original quote character, if any",
+        static: "[boolean] whether this is a static setter (classes only)"
+    },
+    $documentation: "An object setter property",
+    computed_key() {
+        return !(this.key instanceof AST_SymbolMethod);
+    }
+}, AST_ObjectProperty);
+
+var AST_ObjectGetter = DEFNODE("ObjectGetter", "quote static", function AST_ObjectGetter(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.static = props.static;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+        this._annotations = props._annotations;
+    }
+
+    this.flags = 0;
+}, {
+    $propdoc: {
+        quote: "[string|undefined] the original quote character, if any",
+        static: "[boolean] whether this is a static getter (classes only)"
+    },
+    $documentation: "An object getter property",
+    computed_key() {
+        return !(this.key instanceof AST_SymbolMethod);
+    }
+}, AST_ObjectProperty);
+
+var AST_ConciseMethod = DEFNODE("ConciseMethod", "quote static", function AST_ConciseMethod(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.static = props.static;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+        this._annotations = props._annotations;
+    }
+
+    this.flags = 0;
+}, {
+    $propdoc: {
+        quote: "[string|undefined] the original quote character, if any",
+        static: "[boolean] is this method static (classes only)",
+    },
+    $documentation: "An ES6 concise method inside an object or class",
+    computed_key() {
+        return !(this.key instanceof AST_SymbolMethod);
+    }
+}, AST_ObjectProperty);
+
+var AST_PrivateMethod = DEFNODE("PrivateMethod", "static", function AST_PrivateMethod(props) {
+    if (props) {
+        this.static = props.static;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A private class method inside a class",
+    $propdoc: {
+        static: "[boolean] is this a static private method",
+    },
+    computed_key() {
+        return false;
+    },
+}, AST_ObjectProperty);
+
+var AST_Class = DEFNODE("Class", "name extends properties", function AST_Class(props) {
+    if (props) {
+        this.name = props.name;
+        this.extends = props.extends;
+        this.properties = props.properties;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $propdoc: {
+        name: "[AST_SymbolClass|AST_SymbolDefClass?] optional class name.",
+        extends: "[AST_Node]? optional parent class",
+        properties: "[AST_ObjectProperty|AST_ClassStaticBlock]* array of properties or static blocks"
+    },
+    $documentation: "An ES6 class",
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            if (this.name) {
+                this.name._walk(visitor);
+            }
+            if (this.extends) {
+                this.extends._walk(visitor);
+            }
+            this.properties.forEach((prop) => prop._walk(visitor));
+        });
+    },
+    _children_backwards(push) {
+        let i = this.properties.length;
+        while (i--) push(this.properties[i]);
+        if (this.extends) push(this.extends);
+        if (this.name) push(this.name);
+    },
+    /** go through the bits that are executed instantly, not when the class is `new`'d. Doesn't walk the name. */
+    visit_nondeferred_class_parts(visitor) {
+        if (this.extends) {
+            this.extends._walk(visitor);
+        }
+        this.properties.forEach((prop) => {
+            if (prop instanceof AST_ClassStaticBlock) {
+                prop._walk(visitor);
+                return;
+            }
+            if (prop.computed_key()) {
+                visitor.push(prop);
+                prop.key._walk(visitor);
+                visitor.pop();
+            }
+            if (
+                prop instanceof AST_ClassPrivateProperty && prop.static && prop.value
+                || prop instanceof AST_ClassProperty && prop.static && prop.value
+            ) {
+                visitor.push(prop);
+                prop.value._walk(visitor);
+                visitor.pop();
+            }
+        });
+    },
+    /** go through the bits that are executed later, when the class is `new`'d or a static method is called */
+    visit_deferred_class_parts(visitor) {
+        this.properties.forEach((prop) => {
+            if (
+                prop instanceof AST_ConciseMethod
+                || prop instanceof AST_PrivateMethod
+            ) {
+                prop.walk(visitor);
+            } else if (
+                prop instanceof AST_ClassProperty && !prop.static && prop.value
+                || prop instanceof AST_ClassPrivateProperty && !prop.static && prop.value
+            ) {
+                visitor.push(prop);
+                prop.value._walk(visitor);
+                visitor.pop();
+            }
+        });
+    },
+    is_self_referential: function() {
+        const this_id = this.name && this.name.definition().id;
+        let found = false;
+        let class_this = true;
+        this.visit_nondeferred_class_parts(new TreeWalker((node, descend) => {
+            if (found) return true;
+            if (node instanceof AST_This) return (found = class_this);
+            if (node instanceof AST_SymbolRef) return (found = node.definition().id === this_id);
+            if (node instanceof AST_Lambda && !(node instanceof AST_Arrow)) {
+                const class_this_save = class_this;
+                class_this = false;
+                descend();
+                class_this = class_this_save;
+                return true;
+            }
+        }));
+        return found;
+    },
+}, AST_Scope /* TODO a class might have a scope but it's not a scope */);
+
+var AST_ClassProperty = DEFNODE("ClassProperty", "static quote", function AST_ClassProperty(props) {
+    if (props) {
+        this.static = props.static;
+        this.quote = props.quote;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+        this._annotations = props._annotations;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A class property",
+    $propdoc: {
+        static: "[boolean] whether this is a static key",
+        quote: "[string] which quote is being used"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            if (this.key instanceof AST_Node)
+                this.key._walk(visitor);
+            if (this.value instanceof AST_Node)
+                this.value._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.value instanceof AST_Node) push(this.value);
+        if (this.key instanceof AST_Node) push(this.key);
+    },
+    computed_key() {
+        return !(this.key instanceof AST_SymbolClassProperty);
+    }
+}, AST_ObjectProperty);
+
+var AST_ClassPrivateProperty = DEFNODE("ClassPrivateProperty", "", function AST_ClassPrivateProperty(props) {
+    if (props) {
+        this.static = props.static;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A class property for a private property",
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            if (this.value instanceof AST_Node)
+                this.value._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.value instanceof AST_Node) push(this.value);
+    },
+    computed_key() {
+        return false;
+    },
+}, AST_ObjectProperty);
+
+var AST_PrivateIn = DEFNODE("PrivateIn", "key value", function AST_PrivateIn(props) {
+    if (props) {
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An `in` binop when the key is private, eg #x in this",
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.key._walk(visitor);
+            this.value._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.value);
+        push(this.key);
+    },
+});
+
+var AST_DefClass = DEFNODE("DefClass", null, function AST_DefClass(props) {
+    if (props) {
+        this.name = props.name;
+        this.extends = props.extends;
+        this.properties = props.properties;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A class definition",
+}, AST_Class);
+
+var AST_ClassStaticBlock = DEFNODE("ClassStaticBlock", "body block_scope", function AST_ClassStaticBlock (props) {
+    this.body = props.body;
+    this.block_scope = props.block_scope;
+    this.start = props.start;
+    this.end = props.end;
+}, {
+    $documentation: "A block containing statements to be executed in the context of the class",
+    $propdoc: {
+        body: "[AST_Statement*] an array of statements",
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            walk_body(this, visitor);
+        });
+    },
+    _children_backwards(push) {
+        let i = this.body.length;
+        while (i--) push(this.body[i]);
+    },
+    clone: clone_block_scope,
+    computed_key() {
+        return false;
+    },
+}, AST_Scope);
+
+var AST_ClassExpression = DEFNODE("ClassExpression", null, function AST_ClassExpression(props) {
+    if (props) {
+        this.name = props.name;
+        this.extends = props.extends;
+        this.properties = props.properties;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A class expression."
+}, AST_Class);
+
+var AST_Symbol = DEFNODE("Symbol", "scope name thedef", function AST_Symbol(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $propdoc: {
+        name: "[string] name of this symbol",
+        scope: "[AST_Scope/S] the current scope (not necessarily the definition scope)",
+        thedef: "[SymbolDef/S] the definition of this symbol"
+    },
+    $documentation: "Base class for all symbols"
+});
+
+var AST_NewTarget = DEFNODE("NewTarget", null, function AST_NewTarget(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A reference to new.target"
+});
+
+var AST_SymbolDeclaration = DEFNODE("SymbolDeclaration", "init", function AST_SymbolDeclaration(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A declaration symbol (symbol in var/const, function name or argument, symbol in catch)",
+}, AST_Symbol);
+
+var AST_SymbolVar = DEFNODE("SymbolVar", null, function AST_SymbolVar(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol defining a variable",
+}, AST_SymbolDeclaration);
+
+var AST_SymbolBlockDeclaration = DEFNODE(
+    "SymbolBlockDeclaration",
+    null,
+    function AST_SymbolBlockDeclaration(props) {
+        if (props) {
+            this.init = props.init;
+            this.scope = props.scope;
+            this.name = props.name;
+            this.thedef = props.thedef;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "Base class for block-scoped declaration symbols"
+    },
+    AST_SymbolDeclaration
+);
+
+var AST_SymbolConst = DEFNODE("SymbolConst", null, function AST_SymbolConst(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A constant declaration"
+}, AST_SymbolBlockDeclaration);
+
+var AST_SymbolUsing = DEFNODE("SymbolUsing", null, function AST_SymbolUsing(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `using` declaration"
+}, AST_SymbolBlockDeclaration);
+
+var AST_SymbolLet = DEFNODE("SymbolLet", null, function AST_SymbolLet(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A block-scoped `let` declaration"
+}, AST_SymbolBlockDeclaration);
+
+var AST_SymbolFunarg = DEFNODE("SymbolFunarg", null, function AST_SymbolFunarg(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol naming a function argument",
+}, AST_SymbolVar);
+
+var AST_SymbolDefun = DEFNODE("SymbolDefun", null, function AST_SymbolDefun(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol defining a function",
+}, AST_SymbolDeclaration);
+
+var AST_SymbolMethod = DEFNODE("SymbolMethod", null, function AST_SymbolMethod(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol in an object defining a method",
+}, AST_Symbol);
+
+var AST_SymbolClassProperty = DEFNODE("SymbolClassProperty", null, function AST_SymbolClassProperty(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol for a class property",
+}, AST_Symbol);
+
+var AST_SymbolLambda = DEFNODE("SymbolLambda", null, function AST_SymbolLambda(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol naming a function expression",
+}, AST_SymbolDeclaration);
+
+var AST_SymbolDefClass = DEFNODE("SymbolDefClass", null, function AST_SymbolDefClass(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol naming a class's name in a class declaration. Lexically scoped to its containing scope, and accessible within the class."
+}, AST_SymbolBlockDeclaration);
+
+var AST_SymbolClass = DEFNODE("SymbolClass", null, function AST_SymbolClass(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol naming a class's name. Lexically scoped to the class."
+}, AST_SymbolDeclaration);
+
+var AST_SymbolCatch = DEFNODE("SymbolCatch", null, function AST_SymbolCatch(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol naming the exception in catch",
+}, AST_SymbolBlockDeclaration);
+
+var AST_SymbolImport = DEFNODE("SymbolImport", null, function AST_SymbolImport(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol referring to an imported name",
+}, AST_SymbolBlockDeclaration);
+
+var AST_SymbolImportForeign = DEFNODE("SymbolImportForeign", "quote", function AST_SymbolImportForeign(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A symbol imported from a module, but it is defined in the other module, and its real name is irrelevant for this module's purposes",
+}, AST_Symbol);
+
+var AST_Label = DEFNODE("Label", "references", function AST_Label(props) {
+    if (props) {
+        this.references = props.references;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+        this.initialize();
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol naming a label (declaration)",
+    $propdoc: {
+        references: "[AST_LoopControl*] a list of nodes referring to this label"
+    },
+    initialize: function() {
+        this.references = [];
+        this.thedef = this;
+    }
+}, AST_Symbol);
+
+var AST_SymbolRef = DEFNODE("SymbolRef", null, function AST_SymbolRef(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Reference to some symbol (not definition/declaration)",
+}, AST_Symbol);
+
+var AST_SymbolExport = DEFNODE("SymbolExport", "quote", function AST_SymbolExport(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol referring to a name to export",
+}, AST_SymbolRef);
+
+var AST_SymbolExportForeign = DEFNODE("SymbolExportForeign", "quote", function AST_SymbolExportForeign(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A symbol exported from this module, but it is used in the other module, and its real name is irrelevant for this module's purposes",
+}, AST_Symbol);
+
+var AST_LabelRef = DEFNODE("LabelRef", null, function AST_LabelRef(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Reference to a label symbol",
+}, AST_Symbol);
+
+var AST_SymbolPrivateProperty = DEFNODE("SymbolPrivateProperty", null, function AST_SymbolPrivateProperty(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A symbol that refers to a private property",
+}, AST_Symbol);
+
+var AST_This = DEFNODE("This", null, function AST_This(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `this` symbol",
+}, AST_Symbol);
+
+var AST_Super = DEFNODE("Super", null, function AST_Super(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `super` symbol",
+}, AST_This);
+
+var AST_Constant = DEFNODE("Constant", null, function AST_Constant(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for all constants",
+    getValue: function() {
+        return this.value;
+    }
+});
+
+var AST_String = DEFNODE("String", "value quote", function AST_String(props) {
+    if (props) {
+        this.value = props.value;
+        this.quote = props.quote;
+        this.start = props.start;
+        this.end = props.end;
+        this._annotations = props._annotations;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A string literal",
+    $propdoc: {
+        value: "[string] the contents of this string",
+        quote: "[string] the original quote character"
+    }
+}, AST_Constant);
+
+var AST_Number = DEFNODE("Number", "value raw", function AST_Number(props) {
+    if (props) {
+        this.value = props.value;
+        this.raw = props.raw;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A number literal",
+    $propdoc: {
+        value: "[number] the numeric value",
+        raw: "[string] numeric value as string"
+    }
+}, AST_Constant);
+
+var AST_BigInt = DEFNODE("BigInt", "value raw", function AST_BigInt(props) {
+    if (props) {
+        this.value = props.value;
+        this.raw = props.raw;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A big int literal",
+    $propdoc: {
+        value: "[string] big int value, represented as a string",
+        raw: "[string] the original format preserved"
+    }
+}, AST_Constant);
+
+var AST_RegExp = DEFNODE("RegExp", "value", function AST_RegExp(props) {
+    if (props) {
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A regexp literal",
+    $propdoc: {
+        value: "[RegExp] the actual regexp",
+    }
+}, AST_Constant);
+
+var AST_Atom = DEFNODE("Atom", null, function AST_Atom(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for atoms",
+}, AST_Constant);
+
+var AST_Null = DEFNODE("Null", null, function AST_Null(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `null` atom",
+    value: null
+}, AST_Atom);
+
+var AST_NaN = DEFNODE("NaN", null, function AST_NaN(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The impossible value",
+    value: 0/0
+}, AST_Atom);
+
+var AST_Undefined = DEFNODE("Undefined", null, function AST_Undefined(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `undefined` value",
+    value: (function() {}())
+}, AST_Atom);
+
+var AST_Hole = DEFNODE("Hole", null, function AST_Hole(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A hole in an array",
+    value: (function() {}())
+}, AST_Atom);
+
+var AST_Infinity = DEFNODE("Infinity", null, function AST_Infinity(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `Infinity` value",
+    value: 1/0
+}, AST_Atom);
+
+var AST_Boolean = DEFNODE("Boolean", null, function AST_Boolean(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for booleans",
+}, AST_Atom);
+
+var AST_False = DEFNODE("False", null, function AST_False(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `false` atom",
+    value: false
+}, AST_Boolean);
+
+var AST_True = DEFNODE("True", null, function AST_True(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `true` atom",
+    value: true
+}, AST_Boolean);
+
+/* -----[ Walk function ]---- */
+
+/**
+ * Walk nodes in depth-first search fashion.
+ * Callback can return `walk_abort` symbol to stop iteration.
+ * It can also return `true` to stop iteration just for child nodes.
+ * Iteration can be stopped and continued by passing the `to_visit` argument,
+ * which is given to the callback in the second argument.
+ **/
+function walk(node, cb, to_visit = [node]) {
+    const push = to_visit.push.bind(to_visit);
+    while (to_visit.length) {
+        const node = to_visit.pop();
+        const ret = cb(node, to_visit);
+
+        if (ret) {
+            if (ret === walk_abort) return true;
+            continue;
+        }
+
+        node._children_backwards(push);
+    }
+    return false;
+}
+
+/**
+ * Walks an AST node and its children.
+ *
+ * {cb} can return `walk_abort` to interrupt the walk.
+ *
+ * @param node
+ * @param cb {(node, info: { parent: (nth) => any }) => (boolean | undefined)}
+ *
+ * @returns {boolean} whether the walk was aborted
+ *
+ * @example
+ * const found_some_cond = walk_parent(my_ast_node, (node, { parent }) => {
+ *   if (some_cond(node, parent())) return walk_abort
+ * });
+ */
+function walk_parent(node, cb, initial_stack) {
+    const to_visit = [node];
+    const push = to_visit.push.bind(to_visit);
+    const stack = initial_stack ? initial_stack.slice() : [];
+    const parent_pop_indices = [];
+
+    let current;
+
+    const info = {
+        parent: (n = 0) => {
+            if (n === -1) {
+                return current;
+            }
+
+            // [ p1 p0 ] [ 1 0 ]
+            if (initial_stack && n >= stack.length) {
+                n -= stack.length;
+                return initial_stack[
+                    initial_stack.length - (n + 1)
+                ];
+            }
+
+            return stack[stack.length - (1 + n)];
+        },
+    };
+
+    while (to_visit.length) {
+        current = to_visit.pop();
+
+        while (
+            parent_pop_indices.length &&
+            to_visit.length == parent_pop_indices[parent_pop_indices.length - 1]
+        ) {
+            stack.pop();
+            parent_pop_indices.pop();
+        }
+
+        const ret = cb(current, info);
+
+        if (ret) {
+            if (ret === walk_abort) return true;
+            continue;
+        }
+
+        const visit_length = to_visit.length;
+
+        current._children_backwards(push);
+
+        // Push only if we're going to traverse the children
+        if (to_visit.length > visit_length) {
+            stack.push(current);
+            parent_pop_indices.push(visit_length - 1);
+        }
+    }
+
+    return false;
+}
+
+const walk_abort = Symbol("abort walk");
+
+/* -----[ TreeWalker ]----- */
+
+class TreeWalker {
+    constructor(callback) {
+        this.visit = callback;
+        this.stack = [];
+        this.directives = Object.create(null);
+    }
+
+    _visit(node, descend) {
+        this.push(node);
+        var ret = this.visit(node, descend ? function() {
+            descend.call(node);
+        } : noop);
+        if (!ret && descend) {
+            descend.call(node);
+        }
+        this.pop();
+        return ret;
+    }
+
+    parent(n) {
+        return this.stack[this.stack.length - 2 - (n || 0)];
+    }
+
+    push(node) {
+        if (node instanceof AST_Lambda) {
+            this.directives = Object.create(this.directives);
+        } else if (node instanceof AST_Directive && !this.directives[node.value]) {
+            this.directives[node.value] = node;
+        } else if (node instanceof AST_Class) {
+            this.directives = Object.create(this.directives);
+            if (!this.directives["use strict"]) {
+                this.directives["use strict"] = node;
+            }
+        }
+        this.stack.push(node);
+    }
+
+    pop() {
+        var node = this.stack.pop();
+        if (node instanceof AST_Lambda || node instanceof AST_Class) {
+            this.directives = Object.getPrototypeOf(this.directives);
+        }
+    }
+
+    self() {
+        return this.stack[this.stack.length - 1];
+    }
+
+    find_parent(type) {
+        var stack = this.stack;
+        for (var i = stack.length; --i >= 0;) {
+            var x = stack[i];
+            if (x instanceof type) return x;
+        }
+    }
+
+    is_within_loop() {
+        let i = this.stack.length - 1;
+        let child = this.stack[i];
+        while (i--) {
+            const node = this.stack[i];
+
+            if (node instanceof AST_Lambda) return false;
+            if (
+                node instanceof AST_IterationStatement
+                // exclude for-loop bits that only run once
+                && !((node instanceof AST_For) && child === node.init)
+                && !((node instanceof AST_ForIn || node instanceof AST_ForOf) && child === node.object)
+            ) {
+                return true;
+            }
+
+            child = node;
+        }
+
+        return false;
+    }
+
+    find_scope() {
+        var stack = this.stack;
+        for (var i = stack.length; --i >= 0;) {
+            const p = stack[i];
+            if (p instanceof AST_Toplevel) return p;
+            if (p instanceof AST_Lambda) return p;
+            if (p.block_scope) return p.block_scope;
+        }
+    }
+
+    has_directive(type) {
+        var dir = this.directives[type];
+        if (dir) return dir;
+        var node = this.stack[this.stack.length - 1];
+        if (node instanceof AST_Scope && node.body) {
+            for (var i = 0; i < node.body.length; ++i) {
+                var st = node.body[i];
+                if (!(st instanceof AST_Directive)) break;
+                if (st.value == type) return st;
+            }
+        }
+    }
+
+    loopcontrol_target(node) {
+        var stack = this.stack;
+        if (node.label) for (var i = stack.length; --i >= 0;) {
+            var x = stack[i];
+            if (x instanceof AST_LabeledStatement && x.label.name == node.label.name)
+                return x.body;
+        } else for (var i = stack.length; --i >= 0;) {
+            var x = stack[i];
+            if (x instanceof AST_IterationStatement
+                || node instanceof AST_Break && x instanceof AST_Switch)
+                return x;
+        }
+    }
+}
+
+// Tree transformer helpers.
+class TreeTransformer extends TreeWalker {
+    constructor(before, after) {
+        super();
+        this.before = before;
+        this.after = after;
+    }
+}
+
+const _PURE       = 0b00000001;
+const _INLINE     = 0b00000010;
+const _NOINLINE   = 0b00000100;
+const _KEY        = 0b00001000;
+const _MANGLEPROP = 0b00010000;
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+function def_transform(node, descend) {
+    node.DEFMETHOD("transform", function(tw, in_list) {
+        let transformed = undefined;
+        tw.push(this);
+        if (tw.before) transformed = tw.before(this, descend, in_list);
+        if (transformed === undefined) {
+            transformed = this;
+            descend(transformed, tw);
+            if (tw.after) {
+                const after_ret = tw.after(transformed, in_list);
+                if (after_ret !== undefined) transformed = after_ret;
+            }
+        }
+        tw.pop();
+        return transformed;
+    });
+}
+
+def_transform(AST_Node, noop);
+
+def_transform(AST_LabeledStatement, function(self, tw) {
+    self.label = self.label.transform(tw);
+    self.body = self.body.transform(tw);
+});
+
+def_transform(AST_SimpleStatement, function(self, tw) {
+    self.body = self.body.transform(tw);
+});
+
+def_transform(AST_Block, function(self, tw) {
+    self.body = MAP(self.body, tw);
+});
+
+def_transform(AST_Do, function(self, tw) {
+    self.body = self.body.transform(tw);
+    self.condition = self.condition.transform(tw);
+});
+
+def_transform(AST_While, function(self, tw) {
+    self.condition = self.condition.transform(tw);
+    self.body = self.body.transform(tw);
+});
+
+def_transform(AST_For, function(self, tw) {
+    if (self.init) self.init = self.init.transform(tw);
+    if (self.condition) self.condition = self.condition.transform(tw);
+    if (self.step) self.step = self.step.transform(tw);
+    self.body = self.body.transform(tw);
+});
+
+def_transform(AST_ForIn, function(self, tw) {
+    self.init = self.init.transform(tw);
+    self.object = self.object.transform(tw);
+    self.body = self.body.transform(tw);
+});
+
+def_transform(AST_With, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+    self.body = self.body.transform(tw);
+});
+
+def_transform(AST_Exit, function(self, tw) {
+    if (self.value) self.value = self.value.transform(tw);
+});
+
+def_transform(AST_LoopControl, function(self, tw) {
+    if (self.label) self.label = self.label.transform(tw);
+});
+
+def_transform(AST_If, function(self, tw) {
+    self.condition = self.condition.transform(tw);
+    self.body = self.body.transform(tw);
+    if (self.alternative) self.alternative = self.alternative.transform(tw);
+});
+
+def_transform(AST_Switch, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+    self.body = MAP(self.body, tw);
+});
+
+def_transform(AST_Case, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+    self.body = MAP(self.body, tw);
+});
+
+def_transform(AST_Try, function(self, tw) {
+    self.body = self.body.transform(tw);
+    if (self.bcatch) self.bcatch = self.bcatch.transform(tw);
+    if (self.bfinally) self.bfinally = self.bfinally.transform(tw);
+});
+
+def_transform(AST_Catch, function(self, tw) {
+    if (self.argname) self.argname = self.argname.transform(tw);
+    self.body = MAP(self.body, tw);
+});
+
+def_transform(AST_DefinitionsLike, function(self, tw) {
+    self.definitions = MAP(self.definitions, tw);
+});
+
+def_transform(AST_VarDefLike, function(self, tw) {
+    self.name = self.name.transform(tw);
+    if (self.value) self.value = self.value.transform(tw);
+});
+
+def_transform(AST_Destructuring, function(self, tw) {
+    self.names = MAP(self.names, tw);
+});
+
+def_transform(AST_Lambda, function(self, tw) {
+    if (self.name) self.name = self.name.transform(tw);
+    self.argnames = MAP(self.argnames, tw, /* allow_splicing */ false);
+    if (self.body instanceof AST_Node) {
+        self.body = self.body.transform(tw);
+    } else {
+        self.body = MAP(self.body, tw);
+    }
+});
+
+def_transform(AST_Call, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+    self.args = MAP(self.args, tw, /* allow_splicing */ false);
+});
+
+def_transform(AST_Sequence, function(self, tw) {
+    const result = MAP(self.expressions, tw);
+    self.expressions = result.length
+        ? result
+        : [new AST_Number({ value: 0 })];
+});
+
+def_transform(AST_PropAccess, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+});
+
+def_transform(AST_Sub, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+    self.property = self.property.transform(tw);
+});
+
+def_transform(AST_Chain, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+});
+
+def_transform(AST_Yield, function(self, tw) {
+    if (self.expression) self.expression = self.expression.transform(tw);
+});
+
+def_transform(AST_Await, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+});
+
+def_transform(AST_Unary, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+});
+
+def_transform(AST_Binary, function(self, tw) {
+    self.left = self.left.transform(tw);
+    self.right = self.right.transform(tw);
+});
+
+def_transform(AST_PrivateIn, function(self, tw) {
+    self.key = self.key.transform(tw);
+    self.value = self.value.transform(tw);
+});
+
+def_transform(AST_Conditional, function(self, tw) {
+    self.condition = self.condition.transform(tw);
+    self.consequent = self.consequent.transform(tw);
+    self.alternative = self.alternative.transform(tw);
+});
+
+def_transform(AST_Array, function(self, tw) {
+    self.elements = MAP(self.elements, tw);
+});
+
+def_transform(AST_Object, function(self, tw) {
+    self.properties = MAP(self.properties, tw);
+});
+
+def_transform(AST_ObjectProperty, function(self, tw) {
+    if (self.key instanceof AST_Node) {
+        self.key = self.key.transform(tw);
+    }
+    if (self.value) self.value = self.value.transform(tw);
+});
+
+def_transform(AST_Class, function(self, tw) {
+    if (self.name) self.name = self.name.transform(tw);
+    if (self.extends) self.extends = self.extends.transform(tw);
+    self.properties = MAP(self.properties, tw);
+});
+
+def_transform(AST_ClassStaticBlock, function(self, tw) {
+    self.body = MAP(self.body, tw);
+});
+
+def_transform(AST_Expansion, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+});
+
+def_transform(AST_NameMapping, function(self, tw) {
+    self.foreign_name = self.foreign_name.transform(tw);
+    self.name = self.name.transform(tw);
+});
+
+def_transform(AST_Import, function(self, tw) {
+    if (self.imported_name) self.imported_name = self.imported_name.transform(tw);
+    if (self.imported_names) MAP(self.imported_names, tw);
+    self.module_name = self.module_name.transform(tw);
+});
+
+def_transform(AST_Export, function(self, tw) {
+    if (self.exported_definition) self.exported_definition = self.exported_definition.transform(tw);
+    if (self.exported_value) self.exported_value = self.exported_value.transform(tw);
+    if (self.exported_names) MAP(self.exported_names, tw);
+    if (self.module_name) self.module_name = self.module_name.transform(tw);
+});
+
+def_transform(AST_TemplateString, function(self, tw) {
+    self.segments = MAP(self.segments, tw);
+});
+
+def_transform(AST_PrefixedTemplateString, function(self, tw) {
+    self.prefix = self.prefix.transform(tw);
+    self.template_string = self.template_string.transform(tw);
+});
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+(function() {
+
+    var normalize_directives = function(body) {
+        for (var i = 0; i < body.length; i++) {
+            if (body[i] instanceof AST_Statement && body[i].body instanceof AST_String) {
+                body[i] = new AST_Directive({
+                    start: body[i].start,
+                    end: body[i].end,
+                    quote: '"',
+                    value: body[i].body.value
+                });
+            } else {
+                return body;
+            }
+        }
+
+        return body;
+    };
+
+    function import_attributes_from_moz(attributes) {
+        if (attributes && attributes.length > 0) {
+            return new AST_Object({
+                start: my_start_token(attributes),
+                end: my_end_token(attributes),
+                properties: attributes.map((attr) =>
+                    new AST_ObjectKeyVal({
+                        start: my_start_token(attr),
+                        end: my_end_token(attr),
+                        key: attr.key.name || attr.key.value,
+                        value: from_moz(attr.value)
+                    })
+                )
+            });
+        }
+        return null;
+    }
+
+    var MOZ_TO_ME = {
+        Program: function(M) {
+            return new AST_Toplevel({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                body: normalize_directives(M.body.map(from_moz))
+            });
+        },
+
+        ArrayPattern: function(M) {
+            return new AST_Destructuring({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                names: M.elements.map(function(elm) {
+                    if (elm === null) {
+                        return new AST_Hole();
+                    }
+                    return from_moz(elm);
+                }),
+                is_array: true
+            });
+        },
+
+        ObjectPattern: function(M) {
+            return new AST_Destructuring({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                names: M.properties.map(from_moz),
+                is_array: false
+            });
+        },
+
+        AssignmentPattern: function(M) {
+            return new AST_DefaultAssign({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                left: from_moz(M.left),
+                operator: "=",
+                right: from_moz(M.right)
+            });
+        },
+
+        SpreadElement: function(M) {
+            return new AST_Expansion({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.argument)
+            });
+        },
+
+        RestElement: function(M) {
+            return new AST_Expansion({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.argument)
+            });
+        },
+
+        TemplateElement: function(M) {
+            return new AST_TemplateSegment({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                value: M.value.cooked,
+                raw: M.value.raw
+            });
+        },
+
+        TemplateLiteral: function(M) {
+            var segments = [];
+            for (var i = 0; i < M.quasis.length; i++) {
+                segments.push(from_moz(M.quasis[i]));
+                if (M.expressions[i]) {
+                    segments.push(from_moz(M.expressions[i]));
+                }
+            }
+            return new AST_TemplateString({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                segments: segments
+            });
+        },
+
+        TaggedTemplateExpression: function(M) {
+            return new AST_PrefixedTemplateString({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                template_string: from_moz(M.quasi),
+                prefix: from_moz(M.tag)
+            });
+        },
+
+        FunctionDeclaration: function(M) {
+            return new AST_Defun({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                name: M.id && from_moz_symbol(AST_SymbolDefun, M.id),
+                argnames: M.params.map(M => from_moz_pattern(M, AST_SymbolFunarg)),
+                is_generator: M.generator,
+                async: M.async,
+                body: normalize_directives(from_moz(M.body).body)
+            });
+        },
+
+        FunctionExpression: function(M) {
+            return from_moz_lambda(M, /*is_method=*/false);
+        },
+
+        ArrowFunctionExpression: function(M) {
+            const body = M.body.type === "BlockStatement"
+                ? from_moz(M.body).body
+                : [make_node(AST_Return, {}, { value: from_moz(M.body) })];
+            return new AST_Arrow({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                argnames: M.params.map(p => from_moz_pattern(p, AST_SymbolFunarg)),
+                body,
+                async: M.async,
+            });
+        },
+
+        ExpressionStatement: function(M) {
+            return new AST_SimpleStatement({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                body: from_moz(M.expression)
+            });
+        },
+
+        TryStatement: function(M) {
+            var handlers = M.handlers || [M.handler];
+            if (handlers.length > 1 || M.guardedHandlers && M.guardedHandlers.length) {
+                throw new Error("Multiple catch clauses are not supported.");
+            }
+            return new AST_Try({
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                body     : new AST_TryBlock(from_moz(M.block)),
+                bcatch   : from_moz(handlers[0]),
+                bfinally : M.finalizer ? new AST_Finally(from_moz(M.finalizer)) : null
+            });
+        },
+
+        Property: function(M) {
+            if (M.kind == "init" && !M.method) {
+                var args = {
+                    start    : my_start_token(M.key || M.value),
+                    end      : my_end_token(M.value),
+                    key      : M.computed
+                                ? from_moz(M.key)
+                                : M.key.name || String(M.key.value),
+                    quote    : from_moz_quote(M.key, M.computed),
+                    static   : false, // always an object
+                    value    : from_moz(M.value)
+                };
+
+                return new AST_ObjectKeyVal(args);
+            } else {
+                var value = from_moz_lambda(M.value, /*is_method=*/true);
+                var args = {
+                    start    : my_start_token(M.key || M.value),
+                    end      : my_end_token(M.value),
+                    key      : M.computed
+                                ? from_moz(M.key)
+                                : from_moz_symbol(AST_SymbolMethod, M.key),
+                    quote    : from_moz_quote(M.key, M.computed),
+                    static   : false, // always an object
+                    value,
+                };
+
+                if (M.kind == "get") return new AST_ObjectGetter(args);
+                if (M.kind == "set") return new AST_ObjectSetter(args);
+                if (M.method) return new AST_ConciseMethod(args);
+            }
+        },
+
+        MethodDefinition: function(M) {
+            const is_private = M.key.type === "PrivateIdentifier";
+            const key = M.computed ? from_moz(M.key) : new AST_SymbolMethod({ name: M.key.name || String(M.key.value) });
+
+            var args = {
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                key,
+                quote    : from_moz_quote(M.key, M.computed),
+                value    : from_moz_lambda(M.value, /*is_method=*/true),
+                static   : M.static,
+            };
+            if (M.kind == "get") {
+                return new (is_private ? AST_PrivateGetter : AST_ObjectGetter)(args);
+            }
+            if (M.kind == "set") {
+                return new (is_private ? AST_PrivateSetter : AST_ObjectSetter)(args);
+            }
+            return new (is_private ? AST_PrivateMethod : AST_ConciseMethod)(args);
+        },
+
+        FieldDefinition: function(M) {
+            let key;
+            if (M.computed) {
+                key = from_moz(M.key);
+            } else {
+                if (M.key.type !== "Identifier") throw new Error("Non-Identifier key in FieldDefinition");
+                key = from_moz(M.key);
+            }
+            return new AST_ClassProperty({
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                quote    : from_moz_quote(M.key, M.computed),
+                key,
+                value    : from_moz(M.value),
+                static   : M.static,
+            });
+        },
+
+        PropertyDefinition: function(M) {
+            let key;
+            if (M.computed) {
+                key = from_moz(M.key);
+            } else if (M.key.type === "PrivateIdentifier") {
+                return new AST_ClassPrivateProperty({
+                    start    : my_start_token(M),
+                    end      : my_end_token(M),
+                    key      : from_moz(M.key),
+                    value    : from_moz(M.value),
+                    static   : M.static,
+                });
+            } else {
+                key = from_moz_symbol(AST_SymbolClassProperty, M.key);
+            }
+
+            return new AST_ClassProperty({
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                quote    : from_moz_quote(M.key, M.computed),
+                key,
+                value    : from_moz(M.value),
+                static   : M.static,
+            });
+        },
+
+        PrivateIdentifier: function (M) {
+            return new AST_SymbolPrivateProperty({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                name: M.name
+            });
+        },
+
+        StaticBlock: function(M) {
+            return new AST_ClassStaticBlock({
+                start : my_start_token(M),
+                end   : my_end_token(M),
+                body  : M.body.map(from_moz),
+            });
+        },
+
+        ArrayExpression: function(M) {
+            return new AST_Array({
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                elements : M.elements.map(function(elem) {
+                    return elem === null ? new AST_Hole() : from_moz(elem);
+                })
+            });
+        },
+
+        ObjectExpression: function(M) {
+            return new AST_Object({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                properties : M.properties.map(function(prop) {
+                    if (prop.type === "SpreadElement") {
+                        return from_moz(prop);
+                    }
+                    prop.type = "Property";
+                    return from_moz(prop);
+                })
+            });
+        },
+
+        SequenceExpression: function(M) {
+            return new AST_Sequence({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                expressions: M.expressions.map(from_moz)
+            });
+        },
+
+        MemberExpression: function(M) {
+            if (M.property.type === "PrivateIdentifier") {
+                return new AST_DotHash({
+                    start      : my_start_token(M),
+                    end        : my_end_token(M),
+                    property   : M.property.name,
+                    expression : from_moz(M.object),
+                    optional   : M.optional || false
+                });
+            }
+            return new (M.computed ? AST_Sub : AST_Dot)({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                property   : M.computed ? from_moz(M.property) : M.property.name,
+                expression : from_moz(M.object),
+                optional   : M.optional || false
+            });
+        },
+
+        ChainExpression: function(M) {
+            return new AST_Chain({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                expression : from_moz(M.expression)
+            });
+        },
+
+        SwitchCase: function(M) {
+            return new (M.test ? AST_Case : AST_Default)({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                expression : from_moz(M.test),
+                body       : M.consequent.map(from_moz)
+            });
+        },
+
+        VariableDeclaration: function(M) {
+            let decl_type;
+            let defs_type = AST_VarDef;
+            let sym_type;
+            let await_using = false;
+            if (M.kind === "const") {
+                decl_type = AST_Const;
+                sym_type = AST_SymbolConst;
+            } else if (M.kind === "let") {
+                decl_type = AST_Let;
+                sym_type = AST_SymbolLet;
+            } else if (M.kind === "using") {
+                decl_type = AST_Using;
+                defs_type = AST_UsingDef;
+                sym_type = AST_SymbolUsing;
+            } else if (M.kind === "await using") {
+                decl_type = AST_Using;
+                defs_type = AST_UsingDef;
+                sym_type = AST_SymbolUsing;
+                await_using = true;
+            } else {
+                decl_type = AST_Var;
+                sym_type = AST_SymbolVar;
+            }
+            const definitions = M.declarations.map(M => {
+                return new defs_type({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    name: from_moz_pattern(M.id, sym_type),
+                    value: from_moz(M.init),
+                });
+            });
+            return new decl_type({
+                start       : my_start_token(M),
+                end         : my_end_token(M),
+                definitions : definitions,
+                await       : await_using,
+            });
+        },
+
+        ImportDeclaration: function(M) {
+            var imported_name = null;
+            var imported_names = null;
+            M.specifiers.forEach(function (specifier) {
+                if (specifier.type === "ImportSpecifier" || specifier.type === "ImportNamespaceSpecifier") {
+                    if (!imported_names) { imported_names = []; }
+                    imported_names.push(from_moz(specifier));
+                } else if (specifier.type === "ImportDefaultSpecifier") {
+                    imported_name = from_moz(specifier);
+                }
+            });
+            return new AST_Import({
+                start       : my_start_token(M),
+                end         : my_end_token(M),
+                imported_name: imported_name,
+                imported_names : imported_names,
+                module_name : from_moz(M.source),
+                attributes: import_attributes_from_moz(M.attributes || M.assertions),
+                phase: M.phase || null
+            });
+        },
+
+        ImportSpecifier: function(M) {
+            return new AST_NameMapping({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                foreign_name: from_moz_symbol(AST_SymbolImportForeign, M.imported, M.imported.type === "Literal"),
+                name: from_moz_symbol(AST_SymbolImport, M.local)
+            });
+        },
+
+        ImportDefaultSpecifier: function(M) {
+            return from_moz_symbol(AST_SymbolImport, M.local);
+        },
+
+        ImportNamespaceSpecifier: function(M) {
+            return new AST_NameMapping({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                foreign_name: new AST_SymbolImportForeign({ name: "*" }),
+                name: from_moz_symbol(AST_SymbolImport, M.local)
+            });
+        },
+
+        ImportExpression: function(M) {
+            const args = [from_moz(M.source)];
+            if (M.options) {
+                args.push(from_moz(M.options));
+            }
+            if (M.phase) {
+                return new AST_DynamicImport({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    phase: M.phase,
+                    args: args
+                });
+            }
+            return new AST_Call({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz({
+                    type: "Identifier",
+                    name: "import"
+                }),
+                optional: false,
+                args
+            });
+        },
+
+        ExportAllDeclaration: function(M) {
+            var foreign_name = M.exported == null ?
+                new AST_SymbolExportForeign({ name: "*" }) :
+                from_moz_symbol(AST_SymbolExportForeign, M.exported, M.exported.type === "Literal");
+            return new AST_Export({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                exported_names: [
+                    new AST_NameMapping({
+                        start: my_start_token(M),
+                        end: my_end_token(M),
+                        name: new AST_SymbolExport({ name: "*" }),
+                        foreign_name: foreign_name
+                    })
+                ],
+                module_name: from_moz(M.source),
+                attributes: import_attributes_from_moz(M.attributes || M.assertions)
+            });
+        },
+
+        ExportNamedDeclaration: function(M) {
+            if (M.declaration) {
+                // export const, export function, ...
+                return new AST_Export({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    exported_definition: from_moz(M.declaration),
+                    exported_names: null,
+                    module_name: null,
+                    attributes: null,
+                });
+            } else {
+                return new AST_Export({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    exported_definition: null,
+                    exported_names: M.specifiers && M.specifiers.length ? M.specifiers.map(from_moz) : [],
+                    module_name: from_moz(M.source),
+                    attributes: import_attributes_from_moz(M.attributes || M.assertions),
+                });
+            }
+        },
+
+        ExportDefaultDeclaration: function(M) {
+            return new AST_Export({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                exported_value: from_moz(M.declaration),
+                is_default: true
+            });
+        },
+
+        ExportSpecifier: function(M) {
+            return new AST_NameMapping({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                foreign_name: from_moz_symbol(AST_SymbolExportForeign, M.exported, M.exported.type === "Literal"),
+                name: from_moz_symbol(AST_SymbolExport, M.local, M.local.type === "Literal"),
+            });
+        },
+
+        Literal: function(M) {
+            var val = M.value, args = {
+                start  : my_start_token(M),
+                end    : my_end_token(M)
+            };
+            var rx = M.regex;
+            if (rx && rx.pattern) {
+                // RegExpLiteral as per ESTree AST spec
+                args.value = {
+                    source: rx.pattern,
+                    flags: rx.flags
+                };
+                return new AST_RegExp(args);
+            } else if (rx) {
+                // support legacy RegExp
+                const rx_source = M.raw || val;
+                const match = rx_source.match(/^\/(.*)\/(\w*)$/);
+                if (!match) throw new Error("Invalid regex source " + rx_source);
+                const [_, source, flags] = match;
+                args.value = { source, flags };
+                return new AST_RegExp(args);
+            }
+            const bi = typeof M.value === "bigint" ? M.value.toString() : M.bigint;
+            if (typeof bi === "string") {
+                args.value = bi;
+                args.raw = M.raw;
+                return new AST_BigInt(args);
+            }
+            if (val === null) return new AST_Null(args);
+            switch (typeof val) {
+              case "string":
+                args.quote = "\"";
+                args.value = val;
+                return new AST_String(args);
+              case "number":
+                args.value = val;
+                args.raw = M.raw || val.toString();
+                return new AST_Number(args);
+              case "boolean":
+                return new (val ? AST_True : AST_False)(args);
+            }
+        },
+
+        MetaProperty: function(M) {
+            if (M.meta.name === "new" && M.property.name === "target") {
+                return new AST_NewTarget({
+                    start: my_start_token(M),
+                    end: my_end_token(M)
+                });
+            } else if (M.meta.name === "import" && M.property.name === "meta") {
+                return new AST_ImportMeta({
+                    start: my_start_token(M),
+                    end: my_end_token(M)
+                });
+            }
+        },
+
+        Identifier: function(M) {
+            return new AST_SymbolRef({
+                start : my_start_token(M),
+                end   : my_end_token(M),
+                name  : M.name
+            });
+        },
+
+        EmptyStatement: function(M) {
+            return new AST_EmptyStatement({
+                start: my_start_token(M),
+                end: my_end_token(M)
+            });
+        },
+
+        BlockStatement: function(M) {
+            return new AST_BlockStatement({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                body: M.body.map(from_moz)
+            });
+        },
+
+        IfStatement: function(M) {
+            return new AST_If({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                condition: from_moz(M.test),
+                body: from_moz(M.consequent),
+                alternative: from_moz(M.alternate)
+            });
+        },
+
+        LabeledStatement: function(M) {
+            try {
+                const label = from_moz_symbol(AST_Label, M.label);
+                FROM_MOZ_LABELS.push(label);
+
+                const stat = new AST_LabeledStatement({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    label,
+                    body: from_moz(M.body)
+                });
+
+                return stat;
+            } finally {
+                FROM_MOZ_LABELS.pop();
+            }
+        },
+
+        BreakStatement: function(M) {
+            return new AST_Break({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                label: from_moz_label_ref(M.label),
+            });
+        },
+
+        ContinueStatement: function(M) {
+            return new AST_Continue({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                label: from_moz_label_ref(M.label),
+            });
+        },
+
+        WithStatement: function(M) {
+            return new AST_With({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.object),
+                body: from_moz(M.body)
+            });
+        },
+
+        SwitchStatement: function(M) {
+            return new AST_Switch({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.discriminant),
+                body: M.cases.map(from_moz)
+            });
+        },
+
+        ReturnStatement: function(M) {
+            return new AST_Return({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                value: from_moz(M.argument)
+            });
+        },
+
+        ThrowStatement: function(M) {
+            return new AST_Throw({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                value: from_moz(M.argument)
+            });
+        },
+
+        WhileStatement: function(M) {
+            return new AST_While({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                condition: from_moz(M.test),
+                body: from_moz(M.body)
+            });
+        },
+
+        DoWhileStatement: function(M) {
+            return new AST_Do({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                condition: from_moz(M.test),
+                body: from_moz(M.body)
+            });
+        },
+
+        ForStatement: function(M) {
+            return new AST_For({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                init: from_moz(M.init),
+                condition: from_moz(M.test),
+                step: from_moz(M.update),
+                body: from_moz(M.body)
+            });
+        },
+
+        ForInStatement: function(M) {
+            return new AST_ForIn({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                init: from_moz(M.left),
+                object: from_moz(M.right),
+                body: from_moz(M.body)
+            });
+        },
+
+        ForOfStatement: function(M) {
+            return new AST_ForOf({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                init: from_moz(M.left),
+                object: from_moz(M.right),
+                body: from_moz(M.body),
+                await: M.await
+            });
+        },
+
+        AwaitExpression: function(M) {
+            return new AST_Await({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.argument)
+            });
+        },
+
+        YieldExpression: function(M) {
+            return new AST_Yield({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.argument),
+                is_star: M.delegate
+            });
+        },
+
+        DebuggerStatement: function(M) {
+            return new AST_Debugger({
+                start: my_start_token(M),
+                end: my_end_token(M)
+            });
+        },
+
+        CatchClause: function(M) {
+            return new AST_Catch({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                argname: M.param ? from_moz_pattern(M.param, AST_SymbolCatch) : null,
+                body: from_moz(M.body).body
+            });
+        },
+
+        ThisExpression: function(M) {
+            return new AST_This({
+                start: my_start_token(M),
+                name: "this",
+                end: my_end_token(M)
+            });
+        },
+
+        Super: function(M) {
+            return new AST_Super({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                name: "super",
+            });
+        },
+
+        BinaryExpression: function(M) {
+            if (M.left.type === "PrivateIdentifier") {
+                return new AST_PrivateIn({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    key: new AST_SymbolPrivateProperty({
+                        start: my_start_token(M.left),
+                        end: my_end_token(M.left),
+                        name: M.left.name
+                    }),
+                    value: from_moz(M.right),
+                });
+            }
+            return new AST_Binary({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                operator: M.operator,
+                left: from_moz(M.left),
+                right: from_moz(M.right)
+            });
+        },
+
+        LogicalExpression: function(M) {
+            return new AST_Binary({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                operator: M.operator,
+                left: from_moz(M.left),
+                right: from_moz(M.right)
+            });
+        },
+
+        AssignmentExpression: function(M) {
+            return new AST_Assign({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                operator: M.operator,
+                logical: M.operator === "??=" || M.operator === "&&=" || M.operator === "||=",
+                left: from_moz(M.left),
+                right: from_moz(M.right)
+            });
+        },
+
+        ConditionalExpression: function(M) {
+            return new AST_Conditional({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                condition: from_moz(M.test),
+                consequent: from_moz(M.consequent),
+                alternative: from_moz(M.alternate)
+            });
+        },
+
+        NewExpression: function(M) {
+            return new AST_New({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.callee),
+                args: M.arguments.map(from_moz)
+            });
+        },
+
+        CallExpression: function(M) {
+            return new AST_Call({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.callee),
+                optional: M.optional,
+                args: M.arguments.map(from_moz)
+            });
+        }
+    };
+
+    MOZ_TO_ME.UpdateExpression =
+    MOZ_TO_ME.UnaryExpression = function To_Moz_Unary(M) {
+        var prefix = "prefix" in M ? M.prefix
+            : M.type == "UnaryExpression" ? true : false;
+        return new (prefix ? AST_UnaryPrefix : AST_UnaryPostfix)({
+            start      : my_start_token(M),
+            end        : my_end_token(M),
+            operator   : M.operator,
+            expression : from_moz(M.argument)
+        });
+    };
+
+    MOZ_TO_ME.ClassDeclaration =
+    MOZ_TO_ME.ClassExpression = function From_Moz_Class(M) {
+        return new (M.type === "ClassDeclaration" ? AST_DefClass : AST_ClassExpression)({
+            start    : my_start_token(M),
+            end      : my_end_token(M),
+            name     : M.id && from_moz_symbol(M.type === "ClassDeclaration" ? AST_SymbolDefClass : AST_SymbolClass, M.id),
+            extends  : from_moz(M.superClass),
+            properties: M.body.body.map(from_moz)
+        });
+    };
+
+    def_to_moz(AST_EmptyStatement, function To_Moz_EmptyStatement() {
+        return {
+            type: "EmptyStatement"
+        };
+    });
+    def_to_moz(AST_BlockStatement, function To_Moz_BlockStatement(M) {
+        return {
+            type: "BlockStatement",
+            body: M.body.map(to_moz)
+        };
+    });
+    def_to_moz(AST_If, function To_Moz_IfStatement(M) {
+        return {
+            type: "IfStatement",
+            test: to_moz(M.condition),
+            consequent: to_moz(M.body),
+            alternate: to_moz(M.alternative)
+        };
+    });
+    def_to_moz(AST_LabeledStatement, function To_Moz_LabeledStatement(M) {
+        return {
+            type: "LabeledStatement",
+            label: to_moz(M.label),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_Break, function To_Moz_BreakStatement(M) {
+        return {
+            type: "BreakStatement",
+            label: to_moz(M.label)
+        };
+    });
+    def_to_moz(AST_Continue, function To_Moz_ContinueStatement(M) {
+        return {
+            type: "ContinueStatement",
+            label: to_moz(M.label)
+        };
+    });
+    def_to_moz(AST_With, function To_Moz_WithStatement(M) {
+        return {
+            type: "WithStatement",
+            object: to_moz(M.expression),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_Switch, function To_Moz_SwitchStatement(M) {
+        return {
+            type: "SwitchStatement",
+            discriminant: to_moz(M.expression),
+            cases: M.body.map(to_moz)
+        };
+    });
+    def_to_moz(AST_Return, function To_Moz_ReturnStatement(M) {
+        return {
+            type: "ReturnStatement",
+            argument: to_moz(M.value)
+        };
+    });
+    def_to_moz(AST_Throw, function To_Moz_ThrowStatement(M) {
+        return {
+            type: "ThrowStatement",
+            argument: to_moz(M.value)
+        };
+    });
+    def_to_moz(AST_While, function To_Moz_WhileStatement(M) {
+        return {
+            type: "WhileStatement",
+            test: to_moz(M.condition),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_Do, function To_Moz_DoWhileStatement(M) {
+        return {
+            type: "DoWhileStatement",
+            test: to_moz(M.condition),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_For, function To_Moz_ForStatement(M) {
+        return {
+            type: "ForStatement",
+            init: to_moz(M.init),
+            test: to_moz(M.condition),
+            update: to_moz(M.step),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_ForIn, function To_Moz_ForInStatement(M) {
+        return {
+            type: "ForInStatement",
+            left: to_moz(M.init),
+            right: to_moz(M.object),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_ForOf, function To_Moz_ForOfStatement(M) {
+        return {
+            type: "ForOfStatement",
+            left: to_moz(M.init),
+            right: to_moz(M.object),
+            body: to_moz(M.body),
+            await: M.await
+        };
+    });
+    def_to_moz(AST_Await, function To_Moz_AwaitExpression(M) {
+        return {
+            type: "AwaitExpression",
+            argument: to_moz(M.expression)
+        };
+    });
+    def_to_moz(AST_Yield, function To_Moz_YieldExpression(M) {
+        return {
+            type: "YieldExpression",
+            argument: to_moz(M.expression),
+            delegate: M.is_star
+        };
+    });
+    def_to_moz(AST_Debugger, function To_Moz_DebuggerStatement() {
+        return {
+            type: "DebuggerStatement"
+        };
+    });
+    def_to_moz(AST_VarDefLike, function To_Moz_VariableDeclarator(M) {
+        return {
+            type: "VariableDeclarator",
+            id: to_moz(M.name),
+            init: to_moz(M.value)
+        };
+    });
+
+    def_to_moz(AST_This, function To_Moz_ThisExpression() {
+        return {
+            type: "ThisExpression"
+        };
+    });
+    def_to_moz(AST_Super, function To_Moz_Super() {
+        return {
+            type: "Super"
+        };
+    });
+    def_to_moz(AST_Conditional, function To_Moz_ConditionalExpression(M) {
+        return {
+            type: "ConditionalExpression",
+            test: to_moz(M.condition),
+            consequent: to_moz(M.consequent),
+            alternate: to_moz(M.alternative)
+        };
+    });
+    def_to_moz(AST_New, function To_Moz_NewExpression(M) {
+        return {
+            type: "NewExpression",
+            callee: to_moz(M.expression),
+            arguments: M.args.map(to_moz)
+        };
+    });
+    def_to_moz(AST_Call, function To_Moz_CallExpression(M) {
+        if (M.expression instanceof AST_SymbolRef && M.expression.name === "import") {
+            const [source, options] = M.args.map(to_moz);
+            return {
+                type: "ImportExpression",
+                source,
+                options: options || null
+            };
+        }
+
+        return {
+            type: "CallExpression",
+            callee: to_moz(M.expression),
+            optional: M.optional,
+            arguments: M.args.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_DynamicImport, function To_Moz_ImportExpression(M) {
+        const [source, options] = M.args.map(to_moz);
+        return {
+            type: "ImportExpression",
+            source,
+            options: options || null,
+            phase: M.phase
+        };
+    });
+
+    def_to_moz(AST_Toplevel, function To_Moz_Program(M) {
+        return to_moz_scope("Program", M);
+    });
+
+    def_to_moz(AST_Expansion, function To_Moz_Spread(M) {
+        return {
+            type: to_moz_in_destructuring() ? "RestElement" : "SpreadElement",
+            argument: to_moz(M.expression)
+        };
+    });
+
+    def_to_moz(AST_PrefixedTemplateString, function To_Moz_TaggedTemplateExpression(M) {
+        return {
+            type: "TaggedTemplateExpression",
+            tag: to_moz(M.prefix),
+            quasi: to_moz(M.template_string)
+        };
+    });
+
+    def_to_moz(AST_TemplateString, function To_Moz_TemplateLiteral(M) {
+        var quasis = [];
+        var expressions = [];
+        for (var i = 0; i < M.segments.length; i++) {
+            if (i % 2 !== 0) {
+                expressions.push(to_moz(M.segments[i]));
+            } else {
+                quasis.push({
+                    type: "TemplateElement",
+                    value: {
+                        raw: M.segments[i].raw,
+                        cooked: M.segments[i].value
+                    },
+                    tail: i === M.segments.length - 1
+                });
+            }
+        }
+        return {
+            type: "TemplateLiteral",
+            quasis: quasis,
+            expressions: expressions
+        };
+    });
+
+    def_to_moz(AST_Defun, function To_Moz_FunctionDeclaration(M) {
+        return {
+            type: "FunctionDeclaration",
+            id: to_moz(M.name),
+            params: M.argnames.map(to_moz_pattern),
+            generator: M.is_generator,
+            async: M.async,
+            body: to_moz_scope("BlockStatement", M)
+        };
+    });
+
+    def_to_moz(AST_Function, function To_Moz_FunctionExpression(M) {
+        return {
+            type: "FunctionExpression",
+            id: to_moz(M.name),
+            params: M.argnames.map(to_moz_pattern),
+            generator: M.is_generator || false,
+            async: M.async || false,
+            body: to_moz_scope("BlockStatement", M)
+        };
+    });
+
+    def_to_moz(AST_Arrow, function To_Moz_ArrowFunctionExpression(M) {
+        var body = M.body.length === 1 && M.body[0] instanceof AST_Return && M.body[0].value
+            ? to_moz(M.body[0].value)
+            : {
+                type: "BlockStatement",
+                body: M.body.map(to_moz)
+            };
+        return {
+            type: "ArrowFunctionExpression",
+            params: M.argnames.map(to_moz_pattern),
+            async: M.async,
+            body: body,
+        };
+    });
+
+    def_to_moz(AST_Destructuring, function To_Moz_ObjectPattern(M) {
+        if (M.is_array) {
+            return {
+                type: "ArrayPattern",
+                elements: M.names.map(
+                    M => M instanceof AST_Hole ? null : to_moz_pattern(M)
+                ),
+            };
+        }
+        return {
+            type: "ObjectPattern",
+            properties: M.names.map(M => {
+                if (M instanceof AST_ObjectKeyVal) {
+                    var computed = M.computed_key();
+                    const [shorthand, key] = to_moz_property_key(M.key, computed, M.quote, M.value);
+
+                    return {
+                        type: "Property",
+                        computed,
+                        kind: "init",
+                        key: key,
+                        method: false,
+                        shorthand,
+                        value: to_moz_pattern(M.value)
+                    };
+                } else {
+                    return to_moz_pattern(M);
+                }
+            }),
+        };
+    });
+
+    def_to_moz(AST_DefaultAssign, function To_Moz_AssignmentExpression(M) {
+        return {
+            type: "AssignmentPattern",
+            left: to_moz_pattern(M.left),
+            right: to_moz(M.right),
+        };
+    });
+
+    def_to_moz(AST_Directive, function To_Moz_Directive(M) {
+        return {
+            type: "ExpressionStatement",
+            expression: {
+                type: "Literal",
+                value: M.value,
+                raw: M.print_to_string()
+            },
+            directive: M.value
+        };
+    });
+
+    def_to_moz(AST_SimpleStatement, function To_Moz_ExpressionStatement(M) {
+        return {
+            type: "ExpressionStatement",
+            expression: to_moz(M.body)
+        };
+    });
+
+    def_to_moz(AST_SwitchBranch, function To_Moz_SwitchCase(M) {
+        return {
+            type: "SwitchCase",
+            test: to_moz(M.expression),
+            consequent: M.body.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_Try, function To_Moz_TryStatement(M) {
+        return {
+            type: "TryStatement",
+            block: to_moz_block(M.body),
+            handler: to_moz(M.bcatch),
+            guardedHandlers: [],
+            finalizer: to_moz(M.bfinally)
+        };
+    });
+
+    def_to_moz(AST_Catch, function To_Moz_CatchClause(M) {
+        return {
+            type: "CatchClause",
+            param: M.argname != null ? to_moz_pattern(M.argname) : null,
+            body: to_moz_block(M)
+        };
+    });
+
+    def_to_moz(AST_DefinitionsLike, function To_Moz_VariableDeclaration(M) {
+        return {
+            type: "VariableDeclaration",
+            kind:
+                M instanceof AST_Const ? "const" :
+                M instanceof AST_Let ? "let" :
+                M instanceof AST_Using ? (M.await ? "await using" : "using") :
+                "var",
+            declarations: M.definitions.map(to_moz)
+        };
+    });
+
+    function import_attributes_to_moz(attribute) {
+        const import_attributes = [];
+        if (attribute) {
+            for (const { key, value } of attribute.properties) {
+                const key_moz = is_basic_identifier_string(key)
+                    ? { type: "Identifier", name: key }
+                    : { type: "Literal", value: key, raw: JSON.stringify(key) };
+                import_attributes.push({
+                    type: "ImportAttribute",
+                    key: key_moz,
+                    value: to_moz(value)
+                });
+            }
+        }
+        return import_attributes;
+    }
+
+    def_to_moz(AST_Export, function To_Moz_ExportDeclaration(M) {
+        if (M.exported_names) {
+            var first_exported = M.exported_names[0];
+            if (first_exported && first_exported.name.name === "*" && !first_exported.name.quote) {
+                var foreign_name = first_exported.foreign_name;
+                var exported = foreign_name.name === "*" && !foreign_name.quote
+                    ? null
+                    : to_moz(foreign_name);
+                return {
+                    type: "ExportAllDeclaration",
+                    source: to_moz(M.module_name),
+                    exported: exported,
+                    attributes: import_attributes_to_moz(M.attributes)
+                };
+            }
+            return {
+                type: "ExportNamedDeclaration",
+                specifiers: M.exported_names.map(function (name_mapping) {
+                    return {
+                        type: "ExportSpecifier",
+                        exported: to_moz(name_mapping.foreign_name),
+                        local: to_moz(name_mapping.name)
+                    };
+                }),
+                declaration: to_moz(M.exported_definition),
+                source: to_moz(M.module_name),
+                attributes: import_attributes_to_moz(M.attributes)
+            };
+        }
+
+        if (M.is_default) {
+            return {
+                type: "ExportDefaultDeclaration",
+                declaration: to_moz(M.exported_value || M.exported_definition),
+            };
+        } else {
+            return {
+                type: "ExportNamedDeclaration",
+                declaration: to_moz(M.exported_value || M.exported_definition),
+                specifiers: [],
+                source: null,
+            };
+        }
+    });
+
+    def_to_moz(AST_Import, function To_Moz_ImportDeclaration(M) {
+        var specifiers = [];
+        if (M.imported_name) {
+            specifiers.push({
+                type: "ImportDefaultSpecifier",
+                local: to_moz(M.imported_name)
+            });
+        }
+        if (M.imported_names) {
+            var first_imported_foreign_name = M.imported_names[0].foreign_name;
+            if (first_imported_foreign_name.name === "*" && !first_imported_foreign_name.quote) {
+                specifiers.push({
+                    type: "ImportNamespaceSpecifier",
+                    local: to_moz(M.imported_names[0].name)
+                });
+            } else {
+                M.imported_names.forEach(function(name_mapping) {
+                    specifiers.push({
+                        type: "ImportSpecifier",
+                        local: to_moz(name_mapping.name),
+                        imported: to_moz(name_mapping.foreign_name)
+                    });
+                });
+            }
+        }
+        var moz = {
+            type: "ImportDeclaration",
+            specifiers: specifiers,
+            source: to_moz(M.module_name),
+            attributes: import_attributes_to_moz(M.attributes)
+        };
+        if (M.phase) moz.phase = M.phase;
+        return moz;
+    });
+
+    def_to_moz(AST_ImportMeta, function To_Moz_MetaProperty() {
+        return {
+            type: "MetaProperty",
+            meta: {
+                type: "Identifier",
+                name: "import"
+            },
+            property: {
+                type: "Identifier",
+                name: "meta"
+            }
+        };
+    });
+
+    def_to_moz(AST_Sequence, function To_Moz_SequenceExpression(M) {
+        return {
+            type: "SequenceExpression",
+            expressions: M.expressions.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_DotHash, function To_Moz_PrivateMemberExpression(M) {
+        return {
+            type: "MemberExpression",
+            object: to_moz(M.expression),
+            computed: false,
+            property: {
+                type: "PrivateIdentifier",
+                name: M.property
+            },
+            optional: M.optional
+        };
+    });
+
+    def_to_moz(AST_PropAccess, function To_Moz_MemberExpression(M) {
+        var isComputed = M instanceof AST_Sub;
+        return {
+            type: "MemberExpression",
+            object: to_moz(M.expression),
+            computed: isComputed,
+            property: isComputed ? to_moz(M.property) : {type: "Identifier", name: M.property},
+            optional: M.optional
+        };
+    });
+
+    def_to_moz(AST_Chain, function To_Moz_ChainExpression(M) {
+        return {
+            type: "ChainExpression",
+            expression: to_moz(M.expression)
+        };
+    });
+
+    def_to_moz(AST_Unary, function To_Moz_Unary(M) {
+        return {
+            type: M.operator == "++" || M.operator == "--" ? "UpdateExpression" : "UnaryExpression",
+            operator: M.operator,
+            prefix: M instanceof AST_UnaryPrefix,
+            argument: to_moz(M.expression)
+        };
+    });
+
+    def_to_moz(AST_Binary, function To_Moz_BinaryExpression(M) {
+        if (M.operator == "=" && to_moz_in_destructuring()) {
+            return {
+                type: "AssignmentPattern",
+                left: to_moz(M.left),
+                right: to_moz(M.right)
+            };
+        }
+
+        const type = M.operator == "&&" || M.operator == "||" || M.operator === "??"
+            ? "LogicalExpression"
+            : "BinaryExpression";
+
+        return {
+            type,
+            left: to_moz(M.left),
+            operator: M.operator,
+            right: to_moz(M.right)
+        };
+    });
+
+    def_to_moz(AST_Assign, function To_Moz_AssignmentExpression(M) {
+        return {
+            type: "AssignmentExpression",
+            operator: M.operator,
+            left: to_moz(M.left),
+            right: to_moz(M.right)
+        };
+    });
+
+    def_to_moz(AST_PrivateIn, function To_Moz_BinaryExpression_PrivateIn(M) {
+        return {
+            type: "BinaryExpression",
+            left: { type: "PrivateIdentifier", name: M.key.name },
+            operator: "in",
+            right: to_moz(M.value),
+        };
+    });
+
+    def_to_moz(AST_Array, function To_Moz_ArrayExpression(M) {
+        return {
+            type: "ArrayExpression",
+            elements: M.elements.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_Object, function To_Moz_ObjectExpression(M) {
+        return {
+            type: "ObjectExpression",
+            properties: M.properties.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_ObjectProperty, function To_Moz_Property(M, parent) {
+        var computed = M.computed_key();
+        const [shorthand, key] = to_moz_property_key(M.key, computed, M.quote, M.value);
+
+        var kind;
+        if (M instanceof AST_ObjectGetter) {
+            kind = "get";
+        } else
+        if (M instanceof AST_ObjectSetter) {
+            kind = "set";
+        }
+        if (M instanceof AST_PrivateGetter || M instanceof AST_PrivateSetter) {
+            const kind = M instanceof AST_PrivateGetter ? "get" : "set";
+            return {
+                type: "MethodDefinition",
+                computed: false,
+                kind: kind,
+                static: M.static,
+                key: {
+                    type: "PrivateIdentifier",
+                    name: M.key.name
+                },
+                value: to_moz(M.value)
+            };
+        }
+        if (M instanceof AST_ClassPrivateProperty) {
+            return {
+                type: "PropertyDefinition",
+                key: {
+                    type: "PrivateIdentifier",
+                    name: M.key.name
+                },
+                value: to_moz(M.value),
+                computed: false,
+                static: M.static
+            };
+        }
+        if (M instanceof AST_ClassProperty) {
+            return {
+                type: "PropertyDefinition",
+                key,
+                value: to_moz(M.value),
+                computed,
+                static: M.static
+            };
+        }
+        if (parent instanceof AST_Class) {
+            return {
+                type: "MethodDefinition",
+                computed: computed,
+                kind: kind,
+                static: M.static,
+                key: to_moz(M.key),
+                value: to_moz(M.value)
+            };
+        }
+        return {
+            type: "Property",
+            computed: computed,
+            method: false,
+            shorthand,
+            kind: kind,
+            key: key,
+            value: to_moz(M.value)
+        };
+    });
+
+    def_to_moz(AST_ObjectKeyVal, function To_Moz_Property(M) {
+        var computed = M.computed_key();
+        const [shorthand, key] = to_moz_property_key(M.key, computed, M.quote, M.value);
+
+        return {
+            type: "Property",
+            computed: computed,
+            shorthand: shorthand,
+            method: false,
+            kind: "init",
+            key: key,
+            value: to_moz(M.value)
+        };
+    });
+
+    def_to_moz(AST_ConciseMethod, function To_Moz_MethodDefinition(M, parent) {
+        const computed = M.computed_key();
+        const [_always_false, key] = to_moz_property_key(M.key, computed, M.quote, M.value);
+
+        if (parent instanceof AST_Object) {
+            return {
+                type: "Property",
+                kind: "init",
+                computed,
+                method: true,
+                shorthand: false,
+                key,
+                value: to_moz(M.value),
+            };
+        }
+
+        return {
+            type: "MethodDefinition",
+            kind: !computed && M.key.name === "constructor" ? "constructor" : "method",
+            computed,
+            key,
+            value: to_moz(M.value),
+            static: M.static,
+        };
+    });
+
+    def_to_moz(AST_PrivateMethod, function To_Moz_MethodDefinition(M) {
+        return {
+            type: "MethodDefinition",
+            kind: "method",
+            key: { type: "PrivateIdentifier", name: M.key.name },
+            value: to_moz(M.value),
+            computed: false,
+            static: M.static,
+        };
+    });
+
+    def_to_moz(AST_Class, function To_Moz_Class(M) {
+        var type = M instanceof AST_ClassExpression ? "ClassExpression" : "ClassDeclaration";
+        return {
+            type: type,
+            superClass: to_moz(M.extends),
+            id: M.name ? to_moz(M.name) : null,
+            body: {
+                type: "ClassBody",
+                body: M.properties.map(to_moz)
+            }
+        };
+    });
+
+    def_to_moz(AST_ClassStaticBlock, function To_Moz_StaticBlock(M) {
+        return {
+            type: "StaticBlock",
+            body: M.body.map(to_moz),
+        };
+    });
+
+    def_to_moz(AST_NewTarget, function To_Moz_MetaProperty() {
+        return {
+            type: "MetaProperty",
+            meta: {
+                type: "Identifier",
+                name: "new"
+            },
+            property: {
+                type: "Identifier",
+                name: "target"
+            }
+        };
+    });
+
+    def_to_moz(AST_Symbol, function To_Moz_Identifier(M, parent) {
+        if (
+            (M instanceof AST_SymbolMethod && parent.quote) ||
+            ((
+                M instanceof AST_SymbolImportForeign ||
+                M instanceof AST_SymbolExportForeign ||
+                M instanceof AST_SymbolExport
+                ) && M.quote)
+         ) {
+            return {
+                type: "Literal",
+                value: M.name
+            };
+        }
+        var def = M.definition();
+        return {
+            type: "Identifier",
+            name: def ? def.mangled_name || def.name : M.name
+        };
+    });
+
+    def_to_moz(AST_RegExp, function To_Moz_RegExpLiteral(M) {
+        const pattern = M.value.source;
+        const flags = M.value.flags;
+        return {
+            type: "Literal",
+            value: null,
+            raw: M.print_to_string(),
+            regex: { pattern, flags }
+        };
+    });
+
+    def_to_moz(AST_Constant, function To_Moz_Literal(M) {
+        var value = M.value;
+        return {
+            type: "Literal",
+            value: value,
+            raw: M.raw || M.print_to_string()
+        };
+    });
+
+    def_to_moz(AST_Atom, function To_Moz_Atom(M) {
+        return {
+            type: "Identifier",
+            name: String(M.value)
+        };
+    });
+
+    def_to_moz(AST_BigInt, M => ({
+        type: "Literal",
+        // value cannot be represented natively
+        // see: https://github.com/estree/estree/blob/master/es2020.md#bigintliteral
+        value: null,
+        // `M.value` is a string that may be a hex number representation.
+        // but "bigint" property should have only decimal digits
+        bigint: typeof BigInt === "function" ? BigInt(M.value).toString() : M.value,
+        raw: M.raw,
+    }));
+
+    AST_Boolean.DEFMETHOD("to_mozilla_ast", AST_Constant.prototype.to_mozilla_ast);
+    AST_Null.DEFMETHOD("to_mozilla_ast", AST_Constant.prototype.to_mozilla_ast);
+    AST_Hole.DEFMETHOD("to_mozilla_ast", function To_Moz_ArrayHole() { return null; });
+
+    AST_Block.DEFMETHOD("to_mozilla_ast", AST_BlockStatement.prototype.to_mozilla_ast);
+    AST_Lambda.DEFMETHOD("to_mozilla_ast", AST_Function.prototype.to_mozilla_ast);
+
+    /* -----[ tools ]----- */
+
+    function my_start_token(moznode) {
+        var loc = moznode.loc, start = loc && loc.start;
+        var range = moznode.range;
+        return new AST_Token(
+            "",
+            "",
+            start && start.line || 0,
+            start && start.column || 0,
+            range ? range [0] : moznode.start,
+            false,
+            [],
+            [],
+            loc && loc.source,
+        );
+    }
+
+    function my_end_token(moznode) {
+        var loc = moznode.loc, end = loc && loc.end;
+        var range = moznode.range;
+        return new AST_Token(
+            "",
+            "",
+            end && end.line || 0,
+            end && end.column || 0,
+            range ? range [0] : moznode.end,
+            false,
+            [],
+            [],
+            loc && loc.source,
+        );
+    }
+
+    var FROM_MOZ_LABELS = null;
+
+    function from_moz(node) {
+        if (node == null) return null;
+        return MOZ_TO_ME[node.type](node);
+    }
+
+    function from_moz_quote(moz_key, computed) {
+        if (!computed && moz_key.type === "Literal" && typeof moz_key.value === "string") {
+            return '"';
+        } else {
+            return "";
+        }
+    }
+
+    function from_moz_symbol(symbol_type, M, has_quote) {
+        return new symbol_type({
+            start: my_start_token(M),
+            quote: has_quote ? '"' : undefined,
+            name: M.type === "Identifier" ? M.name : String(M.value),
+            end: my_end_token(M),
+        });
+    }
+
+    function from_moz_lambda(M, is_method) {
+        return new (is_method ? AST_Accessor : AST_Function)({
+            start: my_start_token(M),
+            end: my_end_token(M),
+            name: M.id && from_moz_symbol(is_method ? AST_SymbolMethod : AST_SymbolLambda, M.id),
+            argnames: M.params.map(M => from_moz_pattern(M, AST_SymbolFunarg)),
+            is_generator: M.generator,
+            async: M.async,
+            body: normalize_directives(from_moz(M.body).body)
+        });
+    }
+
+    function from_moz_pattern(M, sym_type) {
+        switch (M.type) {
+            case "ObjectPattern":
+                return new AST_Destructuring({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    names: M.properties.map(p => from_moz_pattern(p, sym_type)),
+                    is_array: false
+                });
+
+            case "Property":
+                var key = M.key;
+                var args = {
+                    start    : my_start_token(key || M.value),
+                    end      : my_end_token(M.value),
+                    key      : key.type == "Identifier" ? key.name : String(key.value),
+                    quote    : !M.computed && key.type === "Literal" && typeof key.value === "string"
+                                ? '"'
+                                : "",
+                    value    : from_moz_pattern(M.value, sym_type)
+                };
+                if (M.computed) {
+                    args.key = from_moz(M.key);
+                }
+                return new AST_ObjectKeyVal(args);
+
+            case "ArrayPattern":
+                return new AST_Destructuring({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    names: M.elements.map(function(elm) {
+                        if (elm === null) {
+                            return new AST_Hole();
+                        }
+                        return from_moz_pattern(elm, sym_type);
+                    }),
+                    is_array: true
+                });
+
+            case "SpreadElement":
+            case "RestElement":
+                return new AST_Expansion({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    expression: from_moz_pattern(M.argument, sym_type),
+                });
+
+            case "AssignmentPattern":
+                return new AST_DefaultAssign({
+                    start : my_start_token(M),
+                    end   : my_end_token(M),
+                    left  : from_moz_pattern(M.left, sym_type),
+                    operator: "=",
+                    right : from_moz(M.right),
+                });
+
+            case "Identifier":
+                return new sym_type({
+                    start : my_start_token(M),
+                    end   : my_end_token(M),
+                    name  : M.name,
+                });
+
+            default:
+                throw new Error("Invalid node type for destructuring: " + M.type);
+        }
+    }
+
+    function from_moz_label_ref(m_label) {
+        if (!m_label) return null;
+
+        const label = from_moz_symbol(AST_LabelRef, m_label);
+
+        let i = FROM_MOZ_LABELS.length;
+        while (i--) {
+            const label_origin = FROM_MOZ_LABELS[i];
+
+            if (label.name === label_origin.name) {
+                label.thedef = label_origin;
+                break;
+            }
+        }
+
+        return label;
+    }
+
+    AST_Node.from_mozilla_ast = function(node) {
+        var save_labels = FROM_MOZ_LABELS;
+        FROM_MOZ_LABELS = [];
+        var ast = from_moz(node);
+        FROM_MOZ_LABELS = save_labels;
+        return ast;
+    };
+
+    function set_moz_loc(mynode, moznode) {
+        var start = mynode.start;
+        var end = mynode.end;
+        if (!(start && end)) {
+            return moznode;
+        }
+        if (start.pos != null && end.endpos != null) {
+            moznode.range = [start.pos, end.endpos];
+        }
+        if (start.line) {
+            moznode.loc = {
+                start: {line: start.line, column: start.col},
+                end: end.endline ? {line: end.endline, column: end.endcol} : null
+            };
+            if (start.file) {
+                moznode.loc.source = start.file;
+            }
+        }
+        return moznode;
+    }
+
+    function def_to_moz(mytype, handler) {
+        mytype.DEFMETHOD("to_mozilla_ast", function(parent) {
+            return set_moz_loc(this, handler(this, parent));
+        });
+    }
+
+    var TO_MOZ_STACK = null;
+
+    function to_moz(node) {
+        if (TO_MOZ_STACK === null) { TO_MOZ_STACK = []; }
+        TO_MOZ_STACK.push(node);
+        var ast = node != null ? node.to_mozilla_ast(TO_MOZ_STACK[TO_MOZ_STACK.length - 2]) : null;
+        TO_MOZ_STACK.pop();
+        if (TO_MOZ_STACK.length === 0) { TO_MOZ_STACK = null; }
+        return ast;
+    }
+
+    /** Object property keys can be number literals, string literals, or raw names. Additionally they can be shorthand. We decide that here. */
+    function to_moz_property_key(key, computed = false, quote = false, value = null) {
+        if (computed) {
+            return [false, to_moz(key)];
+        }
+
+        const key_name = typeof key === "string" ? key : key.name;
+        let moz_key;
+        if (quote) {
+            moz_key = { type: "Literal", value: key_name, raw: JSON.stringify(key_name) };
+        } else if ("" + +key_name === key_name && +key_name >= 0) {
+            // representable as a number
+            moz_key = { type: "Literal", value: +key_name, raw: JSON.stringify(+key_name) };
+        } else {
+            moz_key = { type: "Identifier", name: key_name };
+        }
+
+        const shorthand =
+            moz_key.type === "Identifier"
+            && moz_key.name === key_name
+            && (value instanceof AST_Symbol && value.name === key_name
+                || value instanceof AST_DefaultAssign && value.left.name === key_name);
+        return [shorthand, moz_key];
+    }
+
+    function to_moz_pattern(node) {
+        if (node instanceof AST_Expansion) {
+            return {
+                type: "RestElement",
+                argument: to_moz_pattern(node.expression),
+            };
+        }
+
+        if ((
+            node instanceof AST_Symbol
+            || node instanceof AST_Destructuring
+            || node instanceof AST_DefaultAssign
+            || node instanceof AST_PropAccess
+        )) {
+            // Plain translation
+            return to_moz(node);
+        }
+
+        throw new Error(node.TYPE);
+    }
+
+    function to_moz_in_destructuring() {
+        var i = TO_MOZ_STACK.length;
+        while (i--) {
+            if (TO_MOZ_STACK[i] instanceof AST_Destructuring) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    function to_moz_block(node) {
+        return {
+            type: "BlockStatement",
+            body: node.body.map(to_moz)
+        };
+    }
+
+    function to_moz_scope(type, node) {
+        var body = node.body.map(to_moz);
+        if (node.body[0] instanceof AST_SimpleStatement && node.body[0].body instanceof AST_String) {
+            body.unshift(to_moz(new AST_EmptyStatement(node.body[0])));
+        }
+        return {
+            type: type,
+            body: body
+        };
+    }
+})();
+
+// return true if the node at the top of the stack (that means the
+// innermost node in the current output) is lexically the first in
+// a statement.
+function first_in_statement(stack) {
+    let node = stack.parent(-1);
+    for (let i = 0, p; p = stack.parent(i); i++) {
+        if (p instanceof AST_Statement && p.body === node)
+            return true;
+        if ((p instanceof AST_Sequence && p.expressions[0] === node) ||
+            (p.TYPE === "Call" && p.expression === node) ||
+            (p instanceof AST_PrefixedTemplateString && p.prefix === node) ||
+            (p instanceof AST_Dot && p.expression === node) ||
+            (p instanceof AST_Sub && p.expression === node) ||
+            (p instanceof AST_Chain && p.expression === node) ||
+            (p instanceof AST_Conditional && p.condition === node) ||
+            (p instanceof AST_Binary && p.left === node) ||
+            (p instanceof AST_UnaryPostfix && p.expression === node)
+        ) {
+            node = p;
+        } else {
+            return false;
+        }
+    }
+}
+
+// Returns whether the leftmost item in the expression is an object
+function left_is_object(node) {
+    if (node instanceof AST_Object) return true;
+    if (node instanceof AST_Sequence) return left_is_object(node.expressions[0]);
+    if (node.TYPE === "Call") return left_is_object(node.expression);
+    if (node instanceof AST_PrefixedTemplateString) return left_is_object(node.prefix);
+    if (node instanceof AST_Dot || node instanceof AST_Sub) return left_is_object(node.expression);
+    if (node instanceof AST_Chain) return left_is_object(node.expression);
+    if (node instanceof AST_Conditional) return left_is_object(node.condition);
+    if (node instanceof AST_Binary) return left_is_object(node.left);
+    if (node instanceof AST_UnaryPostfix) return left_is_object(node.expression);
+    return false;
+}
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+const CODE_LINE_BREAK = 10;
+const CODE_SPACE = 32;
+
+const r_annotation = /[@#]__(PURE|INLINE|NOINLINE)__/;
+
+function is_some_comments(comment) {
+    // multiline comment
+    return (
+        (comment.type === "comment2" || comment.type === "comment1")
+        && /@preserve|@copyright|@lic|@cc_on|^\**!/i.test(comment.value)
+    );
+}
+
+const ROPE_COMMIT_WHEN = 8 * 1000;
+class Rope {
+    constructor() {
+        this.committed = "";
+        this.current = "";
+    }
+
+    append(str) {
+        /** When `this.current` is too long, commit it. */
+        if (this.current.length > ROPE_COMMIT_WHEN) {
+            this.committed += this.current + str;
+            this.current = "";
+        } else {
+            this.current += str;
+        }
+    }
+
+    insertAt(char, index) {
+        const { committed, current } = this;
+        if (index < committed.length) {
+            this.committed = committed.slice(0, index) + char + committed.slice(index);
+        } else if (index === committed.length) {
+            this.committed += char;
+        } else {
+            index -= committed.length;
+            this.committed += current.slice(0, index) + char;
+            this.current = current.slice(index);
+        }
+    }
+
+    charAt(index) {
+        const { committed } = this;
+        if (index < committed.length) return committed[index];
+        return this.current[index - committed.length];
+    }
+
+    charCodeAt(index) {
+        const { committed } = this;
+        if (index < committed.length) return committed.charCodeAt(index);
+        return this.current.charCodeAt(index - committed.length);
+    }
+
+    length() {
+        return this.committed.length + this.current.length;
+    }
+
+    expectDirective() {
+        // /^$|[;{][\s\n]*$/
+
+        let ch, n = this.length();
+
+        if (n <= 0) return true;
+
+        // Skip N whitespace from the end
+        while (
+            (ch = this.charCodeAt(--n))
+            && (ch == CODE_SPACE || ch == CODE_LINE_BREAK)
+        );
+
+        // either ";", or "{", or the string ended
+        return !ch || ch === 59 || ch === 123;
+    }
+
+    hasNLB() {
+        let n = this.length() - 1;
+        while (n >= 0) {
+            const code = this.charCodeAt(n--);
+
+            if (code === CODE_LINE_BREAK) return true;
+            if (code !== CODE_SPACE) return false;
+        }
+        return true;
+    }
+
+
+    toString() {
+        return this.committed + this.current;
+    }
+}
+
+function OutputStream(options) {
+
+    var readonly = !options;
+    options = defaults(options, {
+        ascii_only           : false,
+        beautify             : false,
+        braces               : false,
+        comments             : "some",
+        ecma                 : 5,
+        ie8                  : false,
+        indent_level         : 4,
+        indent_start         : 0,
+        inline_script        : true,
+        keep_numbers         : false,
+        keep_quoted_props    : false,
+        max_line_len         : false,
+        preamble             : null,
+        preserve_annotations : false,
+        quote_keys           : false,
+        quote_style          : 0,
+        safari10             : false,
+        semicolons           : true,
+        shebang              : true,
+        shorthand            : undefined,
+        source_map           : null,
+        webkit               : false,
+        width                : 80,
+        wrap_iife            : false,
+        wrap_func_args       : false,
+
+        _destroy_ast         : false
+    }, true);
+
+    if (options.shorthand === undefined)
+        options.shorthand = options.ecma > 5;
+
+    // Convert comment option to RegExp if necessary and set up comments filter
+    var comment_filter = return_false; // Default case, throw all comments away
+    if (options.comments) {
+        let comments = options.comments;
+        if (typeof options.comments === "string" && /^\/.*\/[a-zA-Z]*$/.test(options.comments)) {
+            var regex_pos = options.comments.lastIndexOf("/");
+            comments = new RegExp(
+                options.comments.substr(1, regex_pos - 1),
+                options.comments.substr(regex_pos + 1)
+            );
+        }
+        if (comments instanceof RegExp) {
+            comment_filter = function(comment) {
+                return comment.type != "comment5" && comments.test(comment.value);
+            };
+        } else if (typeof comments === "function") {
+            comment_filter = function(comment) {
+                return comment.type != "comment5" && comments(this, comment);
+            };
+        } else if (comments === "some") {
+            comment_filter = is_some_comments;
+        } else { // NOTE includes "all" option
+            comment_filter = return_true;
+        }
+    }
+
+    if (options.preserve_annotations) {
+        let prev_comment_filter = comment_filter;
+        comment_filter = function (comment) {
+            return r_annotation.test(comment.value) || prev_comment_filter.apply(this, arguments);
+        };
+    }
+
+    var indentation = 0;
+    var current_col = 0;
+    var current_line = 1;
+    var current_pos = 0;
+    var OUTPUT = new Rope();
+    let printed_comments = new Set();
+
+    var to_utf8 = options.ascii_only ? function(str, identifier = false, regexp = false) {
+        if (options.ecma >= 2015 && !options.safari10 && !regexp) {
+            str = str.replace(/[\ud800-\udbff][\udc00-\udfff]/g, function(ch) {
+                var code = get_full_char_code(ch, 0).toString(16);
+                return "\\u{" + code + "}";
+            });
+        }
+        return str.replace(/[\u0000-\u001f\u007f-\uffff]/g, function(ch) {
+            var code = ch.charCodeAt(0).toString(16);
+            if (code.length <= 2 && !identifier) {
+                while (code.length < 2) code = "0" + code;
+                return "\\x" + code;
+            } else {
+                while (code.length < 4) code = "0" + code;
+                return "\\u" + code;
+            }
+        });
+    } : function(str) {
+        return str.replace(/[\ud800-\udbff][\udc00-\udfff]|([\ud800-\udbff]|[\udc00-\udfff])/g, function(match, lone) {
+            if (lone) {
+                return "\\u" + lone.charCodeAt(0).toString(16);
+            }
+            return match;
+        });
+    };
+
+    function make_string(str, quote) {
+        var dq = 0, sq = 0;
+        str = str.replace(/[\\\b\f\n\r\v\t\x22\x27\u2028\u2029\0\ufeff]/g,
+          function(s, i) {
+            switch (s) {
+              case '"': ++dq; return '"';
+              case "'": ++sq; return "'";
+              case "\\": return "\\\\";
+              case "\n": return "\\n";
+              case "\r": return "\\r";
+              case "\t": return "\\t";
+              case "\b": return "\\b";
+              case "\f": return "\\f";
+              case "\x0B": return options.ie8 ? "\\x0B" : "\\v";
+              case "\u2028": return "\\u2028";
+              case "\u2029": return "\\u2029";
+              case "\ufeff": return "\\ufeff";
+              case "\0":
+                  return /[0-9]/.test(get_full_char(str, i+1)) ? "\\x00" : "\\0";
+            }
+            return s;
+        });
+        function quote_single() {
+            return "'" + str.replace(/\x27/g, "\\'") + "'";
+        }
+        function quote_double() {
+            return '"' + str.replace(/\x22/g, '\\"') + '"';
+        }
+        function quote_template() {
+            return "`" + str.replace(/`/g, "\\`") + "`";
+        }
+        str = to_utf8(str);
+        if (quote === "`") return quote_template();
+        switch (options.quote_style) {
+          case 1:
+            return quote_single();
+          case 2:
+            return quote_double();
+          case 3:
+            return quote == "'" ? quote_single() : quote_double();
+          default:
+            return dq > sq ? quote_single() : quote_double();
+        }
+    }
+
+    function encode_string(str, quote) {
+        var ret = make_string(str, quote);
+        if (options.inline_script) {
+            ret = ret.replace(/<\x2f(script)([>\/\t\n\f\r ])/gi, "<\\/$1$2");
+            ret = ret.replace(/\x3c!--/g, "\\x3c!--");
+            ret = ret.replace(/--\x3e/g, "--\\x3e");
+        }
+        return ret;
+    }
+
+    function make_name(name) {
+        name = name.toString();
+        name = to_utf8(name, true);
+        return name;
+    }
+
+    function make_indent(back) {
+        return " ".repeat(options.indent_start + indentation - back * options.indent_level);
+    }
+
+    /* -----[ beautification/minification ]----- */
+
+    var has_parens = false;
+    var might_need_space = false;
+    var might_need_semicolon = false;
+    var might_add_newline = 0;
+    var need_newline_indented = false;
+    var need_space = false;
+    var newline_insert = -1;
+    var last = "";
+    var mapping_token, mapping_name, mappings = options.source_map && [];
+
+    var do_add_mapping = mappings ? function() {
+        mappings.forEach(function(mapping) {
+            try {
+                let { name, token } = mapping;
+                if (name !== false) {
+                    if (token.type == "name" || token.type === "privatename") {
+                        name = token.value;
+                    } else if (name instanceof AST_Symbol) {
+                        name = token.type === "string" ? token.value : name.name;
+                    }
+                }
+                options.source_map.add(
+                    mapping.token.file,
+                    mapping.line, mapping.col,
+                    mapping.token.line, mapping.token.col,
+                    is_basic_identifier_string(name) ? name : undefined
+                );
+            } catch(ex) {
+                // Ignore bad mapping
+            }
+        });
+        mappings = [];
+    } : noop;
+
+    var ensure_line_len = options.max_line_len ? function() {
+        if (current_col > options.max_line_len) {
+            if (might_add_newline) {
+                OUTPUT.insertAt("\n", might_add_newline);
+                const len_after_newline = OUTPUT.length() - might_add_newline - 1;
+                if (mappings) {
+                    var delta = len_after_newline - current_col;
+                    mappings.forEach(function(mapping) {
+                        mapping.line++;
+                        mapping.col += delta;
+                    });
+                }
+                current_line++;
+                current_pos++;
+                current_col = len_after_newline;
+            }
+        }
+        if (might_add_newline) {
+            might_add_newline = 0;
+            do_add_mapping();
+        }
+    } : noop;
+
+    var requireSemicolonChars = makePredicate("( [ + * / - , . `");
+
+    function print(str) {
+        str = String(str);
+        var ch = get_full_char(str, 0);
+        if (need_newline_indented && ch) {
+            need_newline_indented = false;
+            if (ch !== "\n") {
+                print("\n");
+                indent();
+            }
+        }
+        if (need_space && ch) {
+            need_space = false;
+            if (!/[\s;})]/.test(ch)) {
+                space();
+            }
+        }
+        newline_insert = -1;
+        var prev = last.charAt(last.length - 1);
+        if (might_need_semicolon) {
+            might_need_semicolon = false;
+
+            if (prev === ":" && ch === "}" || (!ch || !";}".includes(ch)) && prev !== ";") {
+                if (options.semicolons || requireSemicolonChars.has(ch)) {
+                    OUTPUT.append(";");
+                    current_col++;
+                    current_pos++;
+                } else {
+                    ensure_line_len();
+                    if (current_col > 0) {
+                        OUTPUT.append("\n");
+                        current_pos++;
+                        current_line++;
+                        current_col = 0;
+                    }
+
+                    if (/^\s+$/.test(str)) {
+                        // reset the semicolon flag, since we didn't print one
+                        // now and might still have to later
+                        might_need_semicolon = true;
+                    }
+                }
+
+                if (!options.beautify)
+                    might_need_space = false;
+            }
+        }
+
+        if (might_need_space) {
+            if ((is_identifier_char(prev)
+                    && (is_identifier_char(ch) || ch == "\\"))
+                || (ch == "/" && ch == prev)
+                || ((ch == "+" || ch == "-") && ch == last)
+            ) {
+                OUTPUT.append(" ");
+                current_col++;
+                current_pos++;
+            }
+            might_need_space = false;
+        }
+
+        if (mapping_token) {
+            mappings.push({
+                token: mapping_token,
+                name: mapping_name,
+                line: current_line,
+                col: current_col
+            });
+            mapping_token = false;
+            if (!might_add_newline) do_add_mapping();
+        }
+
+        OUTPUT.append(str);
+        has_parens = str[str.length - 1] == "(";
+        current_pos += str.length;
+        var a = str.split(/\r?\n/), n = a.length - 1;
+        current_line += n;
+        current_col += a[0].length;
+        if (n > 0) {
+            ensure_line_len();
+            current_col = a[n].length;
+        }
+        last = str;
+    }
+
+    var star = function() {
+        print("*");
+    };
+
+    var space = options.beautify ? function() {
+        print(" ");
+    } : function() {
+        might_need_space = true;
+    };
+
+    var indent = options.beautify ? function(half) {
+        if (options.beautify) {
+            print(make_indent(half ? 0.5 : 0));
+        }
+    } : noop;
+
+    var with_indent = options.beautify ? function(col, cont) {
+        if (col === true) col = next_indent();
+        var save_indentation = indentation;
+        indentation = col;
+        var ret = cont();
+        indentation = save_indentation;
+        return ret;
+    } : function(col, cont) { return cont(); };
+
+    var newline = options.beautify ? function() {
+        if (newline_insert < 0) return print("\n");
+        if (OUTPUT.charAt(newline_insert) != "\n") {
+            OUTPUT.insertAt("\n", newline_insert);
+            current_pos++;
+            current_line++;
+        }
+        newline_insert++;
+    } : options.max_line_len ? function() {
+        ensure_line_len();
+        might_add_newline = OUTPUT.length();
+    } : noop;
+
+    var semicolon = options.beautify ? function() {
+        print(";");
+    } : function() {
+        might_need_semicolon = true;
+    };
+
+    function force_semicolon() {
+        might_need_semicolon = false;
+        print(";");
+    }
+
+    function next_indent() {
+        return indentation + options.indent_level;
+    }
+
+    function with_block(cont) {
+        var ret;
+        print("{");
+        newline();
+        with_indent(next_indent(), function() {
+            ret = cont();
+        });
+        indent();
+        print("}");
+        return ret;
+    }
+
+    function with_parens(cont) {
+        print("(");
+        //XXX: still nice to have that for argument lists
+        //var ret = with_indent(current_col, cont);
+        var ret = cont();
+        print(")");
+        return ret;
+    }
+
+    function with_square(cont) {
+        print("[");
+        //var ret = with_indent(current_col, cont);
+        var ret = cont();
+        print("]");
+        return ret;
+    }
+
+    function comma() {
+        print(",");
+        space();
+    }
+
+    function colon() {
+        print(":");
+        space();
+    }
+
+    var add_mapping = mappings ? function(token, name) {
+        mapping_token = token;
+        mapping_name = name;
+    } : noop;
+
+    function get() {
+        if (might_add_newline) {
+            ensure_line_len();
+        }
+        return OUTPUT.toString();
+    }
+
+    function filter_comment(comment) {
+        if (!options.preserve_annotations) {
+            comment = comment.replace(r_annotation, " ");
+        }
+        if (/^\s*$/.test(comment)) {
+            return "";
+        }
+        return comment.replace(/(<\s*\/\s*)(script)/i, "<\\/$2");
+    }
+
+    function prepend_comments(node) {
+        var self = this;
+        var start = node.start;
+        if (!start) return;
+        var printed_comments = self.printed_comments;
+
+        // There cannot be a newline between return/yield and its value.
+        const keyword_with_value = 
+            node instanceof AST_Exit && node.value
+            || (node instanceof AST_Await || node instanceof AST_Yield)
+                && node.expression;
+
+        if (
+            start.comments_before
+            && printed_comments.has(start.comments_before)
+        ) {
+            if (keyword_with_value) {
+                start.comments_before = [];
+            } else {
+                return;
+            }
+        }
+
+        var comments = start.comments_before;
+        if (!comments) {
+            comments = start.comments_before = [];
+        }
+        printed_comments.add(comments);
+
+        if (keyword_with_value) {
+            var tw = new TreeWalker(function(node) {
+                var parent = tw.parent();
+                if (parent instanceof AST_Exit
+                    || parent instanceof AST_Await
+                    || parent instanceof AST_Yield
+                    || parent instanceof AST_Binary && parent.left === node
+                    || parent.TYPE == "Call" && parent.expression === node
+                    || parent instanceof AST_Conditional && parent.condition === node
+                    || parent instanceof AST_Dot && parent.expression === node
+                    || parent instanceof AST_Sequence && parent.expressions[0] === node
+                    || parent instanceof AST_Sub && parent.expression === node
+                    || parent instanceof AST_UnaryPostfix) {
+                    if (!node.start) return;
+                    var text = node.start.comments_before;
+                    if (text && !printed_comments.has(text)) {
+                        printed_comments.add(text);
+                        comments = comments.concat(text);
+                    }
+                } else {
+                    return true;
+                }
+            });
+            tw.push(node);
+            keyword_with_value.walk(tw);
+        }
+
+        if (current_pos == 0) {
+            if (comments.length > 0 && options.shebang && comments[0].type === "comment5"
+                && !printed_comments.has(comments[0])) {
+                print("#!" + comments.shift().value + "\n");
+                indent();
+            }
+            var preamble = options.preamble;
+            if (preamble) {
+                print(preamble.replace(/\r\n?|[\n\u2028\u2029]|\s*$/g, "\n"));
+            }
+        }
+
+        comments = comments.filter(comment_filter, node).filter(c => !printed_comments.has(c));
+        if (comments.length == 0) return;
+        var last_nlb = OUTPUT.hasNLB();
+        comments.forEach(function(c, i) {
+            printed_comments.add(c);
+            if (!last_nlb) {
+                if (c.nlb) {
+                    print("\n");
+                    indent();
+                    last_nlb = true;
+                } else if (i > 0) {
+                    space();
+                }
+            }
+
+            if (/comment[134]/.test(c.type)) {
+                var value = filter_comment(c.value);
+                if (value) {
+                    print("//" + value + "\n");
+                    indent();
+                }
+                last_nlb = true;
+            } else if (c.type == "comment2") {
+                var value = filter_comment(c.value);
+                if (value) {
+                    print("/*" + value + "*/");
+                }
+                last_nlb = false;
+            }
+        });
+        if (!last_nlb) {
+            if (start.nlb) {
+                print("\n");
+                indent();
+            } else {
+                space();
+            }
+        }
+    }
+
+    function append_comments(node, tail) {
+        var self = this;
+        var token = node.end;
+        if (!token) return;
+        var printed_comments = self.printed_comments;
+        var comments = token[tail ? "comments_before" : "comments_after"];
+        if (!comments || printed_comments.has(comments)) return;
+        if (!(node instanceof AST_Statement || comments.every((c) =>
+            !/comment[134]/.test(c.type)
+        ))) return;
+        printed_comments.add(comments);
+        var insert = OUTPUT.length();
+        comments.filter(comment_filter, node).forEach(function(c, i) {
+            if (printed_comments.has(c)) return;
+            printed_comments.add(c);
+            need_space = false;
+            if (need_newline_indented) {
+                print("\n");
+                indent();
+                need_newline_indented = false;
+            } else if (c.nlb && (i > 0 || !OUTPUT.hasNLB())) {
+                print("\n");
+                indent();
+            } else if (i > 0 || !tail) {
+                space();
+            }
+            if (/comment[134]/.test(c.type)) {
+                const value = filter_comment(c.value);
+                if (value) {
+                    print("//" + value);
+                }
+                need_newline_indented = true;
+            } else if (c.type == "comment2") {
+                const value = filter_comment(c.value);
+                if (value) {
+                    print("/*" + value + "*/");
+                }
+                need_space = true;
+            }
+        });
+        if (OUTPUT.length() > insert) newline_insert = insert;
+    }
+
+    /**
+     * When output.option("_destroy_ast") is enabled, destroy the function.
+     * Call this after printing it.
+     */
+    const gc_scope =
+      options["_destroy_ast"]
+        ? function gc_scope(scope) {
+            scope.body.length = 0;
+            scope.argnames.length = 0;
+        }
+        : noop;
+
+    var stack = [];
+    return {
+        get             : get,
+        toString        : get,
+        indent          : indent,
+        in_directive    : false,
+        use_asm         : null,
+        active_scope    : null,
+        indentation     : function() { return indentation; },
+        current_width   : function() { return current_col - indentation; },
+        should_break    : function() { return options.width && this.current_width() >= options.width; },
+        has_parens      : function() { return has_parens; },
+        newline         : newline,
+        print           : print,
+        star            : star,
+        space           : space,
+        comma           : comma,
+        colon           : colon,
+        last            : function() { return last; },
+        semicolon       : semicolon,
+        force_semicolon : force_semicolon,
+        to_utf8         : to_utf8,
+        print_name      : function(name) { print(make_name(name)); },
+        print_string    : function(str, quote, escape_directive) {
+            var encoded = encode_string(str, quote);
+            if (escape_directive === true && !encoded.includes("\\")) {
+                // Insert semicolons to break directive prologue
+                if (!OUTPUT.expectDirective()) {
+                    force_semicolon();
+                }
+                force_semicolon();
+            }
+            print(encoded);
+        },
+        print_template_string_chars: function(str) {
+            var encoded = encode_string(str, "`").replace(/\${/g, "\\${");
+            return print(encoded.substr(1, encoded.length - 2));
+        },
+        encode_string   : encode_string,
+        next_indent     : next_indent,
+        with_indent     : with_indent,
+        with_block      : with_block,
+        with_parens     : with_parens,
+        with_square     : with_square,
+        add_mapping     : add_mapping,
+        option          : function(opt) { return options[opt]; },
+        gc_scope,
+        printed_comments: printed_comments,
+        prepend_comments: readonly ? noop : prepend_comments,
+        append_comments : readonly || comment_filter === return_false ? noop : append_comments,
+        line            : function() { return current_line; },
+        col             : function() { return current_col; },
+        pos             : function() { return current_pos; },
+        push_node       : function(node) { stack.push(node); },
+        pop_node        : function() { return stack.pop(); },
+        parent          : function(n) {
+            return stack[stack.length - 2 - (n || 0)];
+        }
+    };
+
+}
+
+/* -----[ code generators ]----- */
+
+(function() {
+
+    /* -----[ utils ]----- */
+
+    function DEFPRINT(nodetype, generator) {
+        nodetype.DEFMETHOD("_codegen", generator);
+    }
+
+    AST_Node.DEFMETHOD("print", function(output, force_parens) {
+        var self = this, generator = self._codegen;
+        if (self instanceof AST_Scope) {
+            output.active_scope = self;
+        } else if (!output.use_asm && self instanceof AST_Directive && self.value == "use asm") {
+            output.use_asm = output.active_scope;
+        }
+        function doit() {
+            output.prepend_comments(self);
+            self.add_source_map(output);
+            generator(self, output);
+            output.append_comments(self);
+        }
+        output.push_node(self);
+        if (force_parens || self.needs_parens(output)) {
+            output.with_parens(doit);
+        } else {
+            doit();
+        }
+        output.pop_node();
+        if (self === output.use_asm) {
+            output.use_asm = null;
+        }
+    });
+    AST_Node.DEFMETHOD("_print", AST_Node.prototype.print);
+
+    AST_Node.DEFMETHOD("print_to_string", function(options) {
+        var output = OutputStream(options);
+        this.print(output);
+        return output.get();
+    });
+
+    /* -----[ PARENTHESES ]----- */
+
+    function PARENS(nodetype, func) {
+        if (Array.isArray(nodetype)) {
+            nodetype.forEach(function(nodetype) {
+                PARENS(nodetype, func);
+            });
+        } else {
+            nodetype.DEFMETHOD("needs_parens", func);
+        }
+    }
+
+    PARENS(AST_Node, return_false);
+
+    // a function expression needs parens around it when it's provably
+    // the first token to appear in a statement.
+    PARENS(AST_Function, function(output) {
+        if (!output.has_parens() && first_in_statement(output)) {
+            return true;
+        }
+
+        if (output.option("webkit")) {
+            var p = output.parent();
+            if (p instanceof AST_PropAccess && p.expression === this) {
+                return true;
+            }
+        }
+
+        if (output.option("wrap_iife")) {
+            var p = output.parent();
+            if (p instanceof AST_Call && p.expression === this) {
+                return true;
+            }
+        }
+
+        if (output.option("wrap_func_args")) {
+            var p = output.parent();
+            if (p instanceof AST_Call && p.args.includes(this)) {
+                return true;
+            }
+        }
+
+        return false;
+    });
+
+    PARENS(AST_Arrow, function(output) {
+        var p = output.parent();
+
+        if (
+            output.option("wrap_func_args")
+            && p instanceof AST_Call
+            && p.args.includes(this)
+        ) {
+            return true;
+        }
+        return p instanceof AST_PropAccess && p.expression === this
+            || p instanceof AST_Conditional && p.condition === this;
+    });
+
+    // same goes for an object literal (as in AST_Function), because
+    // otherwise {...} would be interpreted as a block of code.
+    PARENS(AST_Object, function(output) {
+        return !output.has_parens() && first_in_statement(output);
+    });
+
+    PARENS(AST_ClassExpression, first_in_statement);
+
+    PARENS(AST_Unary, function(output) {
+        var p = output.parent();
+        return p instanceof AST_PropAccess && p.expression === this
+            || p instanceof AST_Call && p.expression === this
+            || p instanceof AST_Binary
+                && p.operator === "**"
+                && this instanceof AST_UnaryPrefix
+                && p.left === this
+                && this.operator !== "++"
+                && this.operator !== "--";
+    });
+
+    PARENS(AST_Await, function(output) {
+        var p = output.parent();
+        return p instanceof AST_PropAccess && p.expression === this
+            || p instanceof AST_Call && p.expression === this
+            || p instanceof AST_Binary && p.operator === "**" && p.left === this
+            || output.option("safari10") && p instanceof AST_UnaryPrefix;
+    });
+
+    PARENS(AST_Sequence, function(output) {
+        var p = output.parent();
+        return p instanceof AST_Call                              // (foo, bar)() or foo(1, (2, 3), 4)
+            || p instanceof AST_Unary                             // !(foo, bar, baz)
+            || p instanceof AST_Binary                            // 1 + (2, 3) + 4 ==> 8
+            || p instanceof AST_VarDefLike                        // var a = (1, 2), b = a + a; ==> b == 4
+            || p instanceof AST_PropAccess && this !== p.property // (1, {foo:2}).foo, (1, {foo:2})["foo"], not foo[1, 2]
+            || p instanceof AST_Array                             // [ 1, (2, 3), 4 ] ==> [ 1, 3, 4 ]
+            || p instanceof AST_ObjectProperty                    // { foo: (1, 2) }.foo ==> 2
+            || p instanceof AST_Conditional                       /* (false, true) ? (a = 10, b = 20) : (c = 30)
+                                                                   * ==> 20 (side effect, set a := 10 and b := 20) */
+            || p instanceof AST_Arrow                             // x => (x, x)
+            || p instanceof AST_DefaultAssign                     // x => (x = (0, function(){}))
+            || p instanceof AST_Expansion                         // [...(a, b)]
+            || p instanceof AST_ForOf && this === p.object        // for (e of (foo, bar)) {}
+            || p instanceof AST_Yield                             // yield (foo, bar)
+            || p instanceof AST_Export                            // export default (foo, bar)
+        ;
+    });
+
+    PARENS(AST_Binary, function(output) {
+        var p = output.parent();
+        // (foo && bar)()
+        if (p instanceof AST_Call && p.expression === this)
+            return true;
+        // typeof (foo && bar)
+        if (p instanceof AST_Unary)
+            return true;
+        // (foo && bar)["prop"], (foo && bar).prop
+        if (p instanceof AST_PropAccess && p.expression === this)
+            return true;
+        // this deals with precedence: 3 * (2 + 1)
+        if (p instanceof AST_Binary) {
+            const parent_op = p.operator;
+            const op = this.operator;
+
+            // It is forbidden for ?? to be used with || or && without parens.
+            if (op === "??" && (parent_op === "||" || parent_op === "&&")) {
+                return true;
+            }
+            if (parent_op === "??" && (op === "||" || op === "&&")) {
+                return true;
+            }
+
+            const pp = PRECEDENCE[parent_op];
+            const sp = PRECEDENCE[op];
+            if (pp > sp
+                || (pp == sp
+                    && (this === p.right || parent_op == "**"))) {
+                return true;
+            }
+        }
+        if (p instanceof AST_PrivateIn) {
+            const op = this.operator;
+
+            const pp = PRECEDENCE["in"];
+            const sp = PRECEDENCE[op];
+            if (pp > sp || (pp == sp && this === p.value)) {
+                return true;
+            }
+        }
+    });
+
+    PARENS(AST_PrivateIn, function(output) {
+        var p = output.parent();
+        // (#x in this)()
+        if (p instanceof AST_Call && p.expression === this) {
+            return true;
+        }
+        // typeof (#x in this)
+        if (p instanceof AST_Unary) {
+            return true;
+        }
+        // (#x in this)["prop"], (#x in this).prop
+        if (p instanceof AST_PropAccess && p.expression === this) {
+            return true;
+        }
+        // same precedence as regular in operator
+        if (p instanceof AST_Binary) {
+            const parent_op = p.operator;
+
+            const pp = PRECEDENCE[parent_op];
+            const sp = PRECEDENCE["in"];
+            if (pp > sp
+                || (pp == sp
+                    && (this === p.right || parent_op == "**"))) {
+                return true;
+            }
+        }
+        // rules are the same as binary in, but the class differs
+        if (p instanceof AST_PrivateIn && this === p.value) {
+            return true;
+        }
+    });
+
+    PARENS(AST_Yield, function(output) {
+        var p = output.parent();
+        // (yield 1) + (yield 2)
+        // a = yield 3
+        if (p instanceof AST_Binary && p.operator !== "=")
+            return true;
+        // (yield 1)()
+        // new (yield 1)()
+        if (p instanceof AST_Call && p.expression === this)
+            return true;
+        // (yield 1) ? yield 2 : yield 3
+        if (p instanceof AST_Conditional && p.condition === this)
+            return true;
+        // -(yield 4)
+        if (p instanceof AST_Unary)
+            return true;
+        // (yield x).foo
+        // (yield x)['foo']
+        if (p instanceof AST_PropAccess && p.expression === this)
+            return true;
+    });
+
+    PARENS(AST_Chain, function(output) {
+        var p = output.parent();
+        if (!(p instanceof AST_Call || p instanceof AST_PropAccess)) return false;
+        return p.expression === this;
+    });
+
+    PARENS(AST_PropAccess, function(output) {
+        var p = output.parent();
+        if (p instanceof AST_New && p.expression === this) {
+            // i.e. new (foo.bar().baz)
+            //
+            // if there's one call into this subtree, then we need
+            // parens around it too, otherwise the call will be
+            // interpreted as passing the arguments to the upper New
+            // expression.
+            return walk(this, node => {
+                if (node instanceof AST_Scope) return true;
+                if (node instanceof AST_Call) {
+                    return walk_abort;  // makes walk() return true.
+                }
+            });
+        }
+    });
+
+    PARENS(AST_Call, function(output) {
+        var p = output.parent(), p1;
+        if (p instanceof AST_New && p.expression === this
+            || p instanceof AST_Export && p.is_default && this.expression instanceof AST_Function)
+            return true;
+
+        // workaround for Safari bug.
+        // https://bugs.webkit.org/show_bug.cgi?id=123506
+        return this.expression instanceof AST_Function
+            && p instanceof AST_PropAccess
+            && p.expression === this
+            && (p1 = output.parent(1)) instanceof AST_Assign
+            && p1.left === p;
+    });
+
+    PARENS(AST_New, function(output) {
+        var p = output.parent();
+        if (this.args.length === 0
+            && (p instanceof AST_PropAccess // (new Date).getTime(), (new Date)["getTime"]()
+                || p instanceof AST_Call && p.expression === this
+                || p instanceof AST_PrefixedTemplateString && p.prefix === this)) // (new foo)(bar)
+            return true;
+    });
+
+    PARENS(AST_Number, function(output) {
+        var p = output.parent();
+        if (p instanceof AST_PropAccess && p.expression === this) {
+            var value = this.getValue();
+            if (value < 0 || /^0/.test(make_num(value))) {
+                return true;
+            }
+        }
+    });
+
+    PARENS(AST_BigInt, function(output) {
+        var p = output.parent();
+        if (p instanceof AST_PropAccess && p.expression === this) {
+            var value = this.getValue();
+            if (value.startsWith("-")) {
+                return true;
+            }
+        }
+    });
+
+    PARENS([ AST_Assign, AST_Conditional ], function(output) {
+        var p = output.parent();
+        // !(a = false) → true
+        if (p instanceof AST_Unary)
+            return true;
+        // 1 + (a = 2) + 3 → 6, side effect setting a = 2
+        if (p instanceof AST_Binary && !(p instanceof AST_Assign))
+            return true;
+        // (a = func)() —or— new (a = Object)()
+        if (p instanceof AST_Call && p.expression === this)
+            return true;
+        // (a = foo) ? bar : baz
+        if (p instanceof AST_Conditional && p.condition === this)
+            return true;
+        // (a = foo)["prop"] —or— (a = foo).prop
+        if (p instanceof AST_PropAccess && p.expression === this)
+            return true;
+        // ({a, b} = {a: 1, b: 2}), a destructuring assignment
+        if (this instanceof AST_Assign && this.left instanceof AST_Destructuring && this.left.is_array === false)
+            return true;
+    });
+
+    /* -----[ PRINTERS ]----- */
+
+    DEFPRINT(AST_Directive, function(self, output) {
+        output.print_string(self.value, self.quote);
+        output.semicolon();
+    });
+
+    DEFPRINT(AST_Expansion, function (self, output) {
+        output.print("...");
+        self.expression.print(output);
+    });
+
+    DEFPRINT(AST_Destructuring, function (self, output) {
+        output.print(self.is_array ? "[" : "{");
+        var len = self.names.length;
+        self.names.forEach(function (name, i) {
+            if (i > 0) output.comma();
+            name.print(output);
+            // If the final element is a hole, we need to make sure it
+            // doesn't look like a trailing comma, by inserting an actual
+            // trailing comma.
+            if (i == len - 1 && name instanceof AST_Hole) output.comma();
+        });
+        output.print(self.is_array ? "]" : "}");
+    });
+
+    DEFPRINT(AST_Debugger, function(self, output) {
+        output.print("debugger");
+        output.semicolon();
+    });
+
+    /* -----[ statements ]----- */
+
+    function display_body(body, is_toplevel, output, allow_directives) {
+        var last = body.length - 1;
+        output.in_directive = allow_directives;
+        body.forEach(function(stmt, i) {
+            if (output.in_directive === true && !(stmt instanceof AST_Directive ||
+                stmt instanceof AST_EmptyStatement ||
+                (stmt instanceof AST_SimpleStatement && stmt.body instanceof AST_String)
+            )) {
+                output.in_directive = false;
+            }
+            if (!(stmt instanceof AST_EmptyStatement)) {
+                output.indent();
+                stmt.print(output);
+                if (!(i == last && is_toplevel)) {
+                    output.newline();
+                    if (is_toplevel) output.newline();
+                }
+            }
+            if (output.in_directive === true &&
+                stmt instanceof AST_SimpleStatement &&
+                stmt.body instanceof AST_String
+            ) {
+                output.in_directive = false;
+            }
+        });
+        output.in_directive = false;
+    }
+
+    AST_StatementWithBody.DEFMETHOD("_do_print_body", function(output) {
+        print_maybe_braced_body(this.body, output);
+    });
+
+    DEFPRINT(AST_Statement, function(self, output) {
+        self.body.print(output);
+        output.semicolon();
+    });
+    DEFPRINT(AST_Toplevel, function(self, output) {
+        display_body(self.body, true, output, true);
+        output.print("");
+    });
+    DEFPRINT(AST_LabeledStatement, function(self, output) {
+        self.label.print(output);
+        output.colon();
+        self.body.print(output);
+    });
+    DEFPRINT(AST_SimpleStatement, function(self, output) {
+        self.body.print(output);
+        output.semicolon();
+    });
+    function print_braced_empty(self, output) {
+        output.print("{");
+        output.with_indent(output.next_indent(), function() {
+            output.append_comments(self, true);
+        });
+        output.add_mapping(self.end);
+        output.print("}");
+    }
+    function print_braced(self, output, allow_directives) {
+        if (self.body.length > 0) {
+            output.with_block(function() {
+                display_body(self.body, false, output, allow_directives);
+                output.add_mapping(self.end);
+            });
+        } else print_braced_empty(self, output);
+    }
+    DEFPRINT(AST_BlockStatement, function(self, output) {
+        print_braced(self, output);
+    });
+    DEFPRINT(AST_EmptyStatement, function(self, output) {
+        output.semicolon();
+    });
+    DEFPRINT(AST_Do, function(self, output) {
+        output.print("do");
+        output.space();
+        make_block(self.body, output);
+        output.space();
+        output.print("while");
+        output.space();
+        output.with_parens(function() {
+            self.condition.print(output);
+        });
+        output.semicolon();
+    });
+    DEFPRINT(AST_While, function(self, output) {
+        output.print("while");
+        output.space();
+        output.with_parens(function() {
+            self.condition.print(output);
+        });
+        output.space();
+        self._do_print_body(output);
+    });
+    DEFPRINT(AST_For, function(self, output) {
+        output.print("for");
+        output.space();
+        output.with_parens(function() {
+            if (self.init) {
+                if (self.init instanceof AST_DefinitionsLike) {
+                    self.init.print(output);
+                } else {
+                    parenthesize_for_noin(self.init, output, true);
+                }
+                output.print(";");
+                output.space();
+            } else {
+                output.print(";");
+            }
+            if (self.condition) {
+                self.condition.print(output);
+                output.print(";");
+                output.space();
+            } else {
+                output.print(";");
+            }
+            if (self.step) {
+                self.step.print(output);
+            }
+        });
+        output.space();
+        self._do_print_body(output);
+    });
+    DEFPRINT(AST_ForIn, function(self, output) {
+        output.print("for");
+        if (self.await) {
+            output.space();
+            output.print("await");
+        }
+        output.space();
+        output.with_parens(function() {
+            self.init.print(output);
+            output.space();
+            output.print(self instanceof AST_ForOf ? "of" : "in");
+            output.space();
+            self.object.print(output);
+        });
+        output.space();
+        self._do_print_body(output);
+    });
+    DEFPRINT(AST_With, function(self, output) {
+        output.print("with");
+        output.space();
+        output.with_parens(function() {
+            self.expression.print(output);
+        });
+        output.space();
+        self._do_print_body(output);
+    });
+
+    /* -----[ functions ]----- */
+    AST_Lambda.DEFMETHOD("_do_print", function(output, nokeyword) {
+        var self = this;
+        if (!nokeyword) {
+            if (self.async) {
+                output.print("async");
+                output.space();
+            }
+            output.print("function");
+            if (self.is_generator) {
+                output.star();
+            }
+            if (self.name) {
+                output.space();
+            }
+        }
+        if (self.name instanceof AST_Symbol) {
+            self.name.print(output);
+        } else if (nokeyword && self.name instanceof AST_Node) {
+            output.with_square(function() {
+                self.name.print(output); // Computed method name
+            });
+        }
+        output.with_parens(function() {
+            self.argnames.forEach(function(arg, i) {
+                if (i) output.comma();
+                arg.print(output);
+            });
+        });
+        output.space();
+        print_braced(self, output, true);
+    });
+    DEFPRINT(AST_Lambda, function(self, output) {
+        self._do_print(output);
+        output.gc_scope(self);
+    });
+
+    DEFPRINT(AST_PrefixedTemplateString, function(self, output) {
+        var tag = self.prefix;
+        var parenthesize_tag = tag instanceof AST_Lambda
+            || tag instanceof AST_Binary
+            || tag instanceof AST_Conditional
+            || tag instanceof AST_Sequence
+            || tag instanceof AST_Unary
+            || tag instanceof AST_Dot && tag.expression instanceof AST_Object;
+        if (parenthesize_tag) output.print("(");
+        self.prefix.print(output);
+        if (parenthesize_tag) output.print(")");
+        self.template_string.print(output);
+    });
+    DEFPRINT(AST_TemplateString, function(self, output) {
+        var is_tagged = output.parent() instanceof AST_PrefixedTemplateString;
+
+        output.print("`");
+        for (var i = 0; i < self.segments.length; i++) {
+            if (!(self.segments[i] instanceof AST_TemplateSegment)) {
+                output.print("${");
+                self.segments[i].print(output);
+                output.print("}");
+            } else if (is_tagged) {
+                output.print(self.segments[i].raw);
+            } else {
+                output.print_template_string_chars(self.segments[i].value);
+            }
+        }
+        output.print("`");
+    });
+    DEFPRINT(AST_TemplateSegment, function(self, output) {
+        output.print_template_string_chars(self.value);
+    });
+
+    AST_Arrow.DEFMETHOD("_do_print", function(output) {
+        var self = this;
+        var parent = output.parent();
+        var needs_parens = (parent instanceof AST_Binary &&
+                !(parent instanceof AST_Assign) &&
+                !(parent instanceof AST_DefaultAssign)) ||
+            parent instanceof AST_Unary ||
+            (parent instanceof AST_Call && self === parent.expression);
+        if (needs_parens) { output.print("("); }
+        if (self.async) {
+            output.print("async");
+            output.space();
+        }
+        if (self.argnames.length === 1 && self.argnames[0] instanceof AST_Symbol) {
+            self.argnames[0].print(output);
+        } else {
+            output.with_parens(function() {
+                self.argnames.forEach(function(arg, i) {
+                    if (i) output.comma();
+                    arg.print(output);
+                });
+            });
+        }
+        output.space();
+        output.print("=>");
+        output.space();
+        const first_statement = self.body[0];
+        if (
+            self.body.length === 1
+            && first_statement instanceof AST_Return
+        ) {
+            const returned = first_statement.value;
+            if (!returned) {
+                output.print("{}");
+            } else if (left_is_object(returned)) {
+                output.print("(");
+                returned.print(output);
+                output.print(")");
+            } else {
+                returned.print(output);
+            }
+        } else {
+            print_braced(self, output);
+        }
+        if (needs_parens) { output.print(")"); }
+        output.gc_scope(self);
+    });
+
+    /* -----[ exits ]----- */
+    AST_Exit.DEFMETHOD("_do_print", function(output, kind) {
+        output.print(kind);
+        if (this.value) {
+            output.space();
+            const comments = this.value.start.comments_before;
+            if (comments && comments.length && !output.printed_comments.has(comments)) {
+                output.print("(");
+                this.value.print(output);
+                output.print(")");
+            } else {
+                this.value.print(output);
+            }
+        }
+        output.semicolon();
+    });
+    DEFPRINT(AST_Return, function(self, output) {
+        self._do_print(output, "return");
+    });
+    DEFPRINT(AST_Throw, function(self, output) {
+        self._do_print(output, "throw");
+    });
+
+    /* -----[ yield ]----- */
+
+    DEFPRINT(AST_Yield, function(self, output) {
+        var star = self.is_star ? "*" : "";
+        output.print("yield" + star);
+        if (self.expression) {
+            output.space();
+            self.expression.print(output);
+        }
+    });
+
+    DEFPRINT(AST_Await, function(self, output) {
+        output.print("await");
+        output.space();
+        var e = self.expression;
+        var parens = !(
+               e instanceof AST_Call
+            || e instanceof AST_SymbolRef
+            || e instanceof AST_PropAccess
+            || e instanceof AST_Unary
+            || e instanceof AST_Constant
+            || e instanceof AST_Await
+            || e instanceof AST_Object
+        );
+        if (parens) output.print("(");
+        self.expression.print(output);
+        if (parens) output.print(")");
+    });
+
+    /* -----[ loop control ]----- */
+    AST_LoopControl.DEFMETHOD("_do_print", function(output, kind) {
+        output.print(kind);
+        if (this.label) {
+            output.space();
+            this.label.print(output);
+        }
+        output.semicolon();
+    });
+    DEFPRINT(AST_Break, function(self, output) {
+        self._do_print(output, "break");
+    });
+    DEFPRINT(AST_Continue, function(self, output) {
+        self._do_print(output, "continue");
+    });
+
+    /* -----[ if ]----- */
+    function make_then(self, output) {
+        var b = self.body;
+        if (output.option("braces")
+            || output.option("ie8") && b instanceof AST_Do)
+            return make_block(b, output);
+        // The squeezer replaces "block"-s that contain only a single
+        // statement with the statement itself; technically, the AST
+        // is correct, but this can create problems when we output an
+        // IF having an ELSE clause where the THEN clause ends in an
+        // IF *without* an ELSE block (then the outer ELSE would refer
+        // to the inner IF).  This function checks for this case and
+        // adds the block braces if needed.
+        if (!b) return output.force_semicolon();
+        while (true) {
+            if (b instanceof AST_If) {
+                if (!b.alternative) {
+                    make_block(self.body, output);
+                    return;
+                }
+                b = b.alternative;
+            } else if (b instanceof AST_StatementWithBody) {
+                b = b.body;
+            } else break;
+        }
+        print_maybe_braced_body(self.body, output);
+    }
+    DEFPRINT(AST_If, function(self, output) {
+        output.print("if");
+        output.space();
+        output.with_parens(function() {
+            self.condition.print(output);
+        });
+        output.space();
+        if (self.alternative) {
+            make_then(self, output);
+            output.space();
+            output.print("else");
+            output.space();
+            if (self.alternative instanceof AST_If)
+                self.alternative.print(output);
+            else
+                print_maybe_braced_body(self.alternative, output);
+        } else {
+            self._do_print_body(output);
+        }
+    });
+
+    /* -----[ switch ]----- */
+    DEFPRINT(AST_Switch, function(self, output) {
+        output.print("switch");
+        output.space();
+        output.with_parens(function() {
+            self.expression.print(output);
+        });
+        output.space();
+        var last = self.body.length - 1;
+        if (last < 0) print_braced_empty(self, output);
+        else output.with_block(function() {
+            self.body.forEach(function(branch, i) {
+                output.indent(true);
+                branch.print(output);
+                if (i < last && branch.body.length > 0)
+                    output.newline();
+            });
+        });
+    });
+    AST_SwitchBranch.DEFMETHOD("_do_print_body", function(output) {
+        output.newline();
+        this.body.forEach(function(stmt) {
+            output.indent();
+            stmt.print(output);
+            output.newline();
+        });
+    });
+    DEFPRINT(AST_Default, function(self, output) {
+        output.print("default:");
+        self._do_print_body(output);
+    });
+    DEFPRINT(AST_Case, function(self, output) {
+        output.print("case");
+        output.space();
+        self.expression.print(output);
+        output.print(":");
+        self._do_print_body(output);
+    });
+
+    /* -----[ exceptions ]----- */
+    DEFPRINT(AST_Try, function(self, output) {
+        output.print("try");
+        output.space();
+        self.body.print(output);
+        if (self.bcatch) {
+            output.space();
+            self.bcatch.print(output);
+        }
+        if (self.bfinally) {
+            output.space();
+            self.bfinally.print(output);
+        }
+    });
+    DEFPRINT(AST_TryBlock, function(self, output) {
+        print_braced(self, output);
+    });
+    DEFPRINT(AST_Catch, function(self, output) {
+        output.print("catch");
+        if (self.argname) {
+            output.space();
+            output.with_parens(function() {
+                self.argname.print(output);
+            });
+        }
+        output.space();
+        print_braced(self, output);
+    });
+    DEFPRINT(AST_Finally, function(self, output) {
+        output.print("finally");
+        output.space();
+        print_braced(self, output);
+    });
+
+    /* -----[ var/const ]----- */
+    AST_DefinitionsLike.DEFMETHOD("_do_print", function(output, kind) {
+        output.print(kind);
+        output.space();
+        this.definitions.forEach(function(def, i) {
+            if (i) output.comma();
+            def.print(output);
+        });
+        var p = output.parent();
+        var in_for = p instanceof AST_For || p instanceof AST_ForIn;
+        var output_semicolon = !in_for || p && p.init !== this;
+        if (output_semicolon)
+            output.semicolon();
+    });
+    DEFPRINT(AST_Let, function(self, output) {
+        self._do_print(output, "let");
+    });
+    DEFPRINT(AST_Var, function(self, output) {
+        self._do_print(output, "var");
+    });
+    DEFPRINT(AST_Const, function(self, output) {
+        self._do_print(output, "const");
+    });
+    DEFPRINT(AST_Using, function(self, output) {
+        self._do_print(output, self.await ? "await using" : "using");
+    });
+    DEFPRINT(AST_Import, function(self, output) {
+        output.print("import");
+        output.space();
+        if (self.phase) {
+            output.print(self.phase);
+            output.space();
+        }
+        if (self.imported_name) {
+            self.imported_name.print(output);
+        }
+        if (self.imported_name && self.imported_names) {
+            output.print(",");
+            output.space();
+        }
+        if (self.imported_names) {
+            if (self.imported_names.length === 1 &&
+                self.imported_names[0].foreign_name.name === "*" &&
+                !self.imported_names[0].foreign_name.quote) {
+                self.imported_names[0].print(output);
+            } else {
+                output.print("{");
+                self.imported_names.forEach(function (name_import, i) {
+                    output.space();
+                    name_import.print(output);
+                    if (i < self.imported_names.length - 1) {
+                        output.print(",");
+                    }
+                });
+                output.space();
+                output.print("}");
+            }
+        }
+        if (self.imported_name || self.imported_names) {
+            output.space();
+            output.print("from");
+            output.space();
+        }
+        self.module_name.print(output);
+        if (self.attributes) {
+            output.print("with");
+            self.attributes.print(output);
+        }
+        output.semicolon();
+    });
+    DEFPRINT(AST_ImportMeta, function(self, output) {
+        output.print("import.meta");
+    });
+    DEFPRINT(AST_DynamicImport, function(self, output) {
+        output.print("import." + self.phase);
+        output.with_parens(function() {
+            self.args.forEach(function(arg, i) {
+                if (i) output.comma();
+                arg.print(output);
+            });
+        });
+    });
+
+    DEFPRINT(AST_NameMapping, function(self, output) {
+        var is_import = output.parent() instanceof AST_Import;
+        var definition = self.name.definition();
+        var foreign_name = self.foreign_name;
+        var names_are_different =
+            (definition && definition.mangled_name || self.name.name) !==
+            foreign_name.name;
+        if (!names_are_different &&
+            foreign_name.name === "*" &&
+            !!foreign_name.quote != !!self.name.quote) {
+                // export * as "*"
+            names_are_different = true;
+        }
+        var foreign_name_is_name = !foreign_name.quote;
+        if (names_are_different) {
+            if (is_import) {
+                if (foreign_name_is_name) {
+                    output.print(foreign_name.name);
+                } else {
+                    output.print_string(foreign_name.name, foreign_name.quote);
+                }
+            } else {
+                if (!self.name.quote) {
+                    self.name.print(output);
+                } else {
+                    output.print_string(self.name.name, self.name.quote);
+                }
+                
+            }
+            output.space();
+            output.print("as");
+            output.space();
+            if (is_import) {
+                self.name.print(output);
+            } else {
+                if (foreign_name_is_name) {
+                    output.print(foreign_name.name);
+                } else {
+                    output.print_string(foreign_name.name, foreign_name.quote);
+                }
+            }
+        } else {
+            if (!self.name.quote) {
+                self.name.print(output);
+            } else {
+                output.print_string(self.name.name, self.name.quote);
+            }
+        }
+    });
+
+    DEFPRINT(AST_Export, function(self, output) {
+        output.print("export");
+        output.space();
+        if (self.is_default) {
+            output.print("default");
+            output.space();
+        }
+        if (self.exported_names) {
+            if (self.exported_names.length === 1 &&
+                self.exported_names[0].name.name === "*" &&
+                !self.exported_names[0].name.quote) {
+                    self.exported_names[0].print(output);
+            } else {
+                output.print("{");
+                self.exported_names.forEach(function(name_export, i) {
+                    output.space();
+                    name_export.print(output);
+                    if (i < self.exported_names.length - 1) {
+                        output.print(",");
+                    }
+                });
+                output.space();
+                output.print("}");
+            }
+        } else if (self.exported_value) {
+            self.exported_value.print(output);
+        } else if (self.exported_definition) {
+            self.exported_definition.print(output);
+            if (self.exported_definition instanceof AST_Definitions) return;
+        }
+        if (self.module_name) {
+            output.space();
+            output.print("from");
+            output.space();
+            self.module_name.print(output);
+        }
+        if (self.attributes) {
+            output.print("with");
+            self.attributes.print(output);
+        }
+        if (self.exported_value
+                && !(self.exported_value instanceof AST_Defun ||
+                    self.exported_value instanceof AST_Function ||
+                    self.exported_value instanceof AST_Class)
+            || self.module_name
+            || self.exported_names
+        ) {
+            output.semicolon();
+        }
+    });
+
+    function parenthesize_for_noin(node, output, noin) {
+        var parens = false;
+        // need to take some precautions here:
+        //    https://github.com/mishoo/UglifyJS2/issues/60
+        if (noin) {
+            parens = walk(node, node => {
+                // Don't go into scopes -- except arrow functions:
+                // https://github.com/terser/terser/issues/1019#issuecomment-877642607
+                if (node instanceof AST_Scope && !(node instanceof AST_Arrow)) {
+                    return true;
+                }
+                if (
+                    node instanceof AST_Binary && node.operator == "in"
+                    || node instanceof AST_PrivateIn
+                ) {
+                    return walk_abort;  // makes walk() return true
+                }
+            });
+        }
+        node.print(output, parens);
+    }
+
+    DEFPRINT(AST_VarDefLike, function(self, output) {
+        self.name.print(output);
+        if (self.value) {
+            output.space();
+            output.print("=");
+            output.space();
+            var p = output.parent(1);
+            var noin = p instanceof AST_For || p instanceof AST_ForIn;
+            parenthesize_for_noin(self.value, output, noin);
+        }
+    });
+
+    /* -----[ other expressions ]----- */
+    DEFPRINT(AST_Call, function(self, output) {
+        self.expression.print(output);
+        if (self instanceof AST_New && self.args.length === 0)
+            return;
+        if (self.expression instanceof AST_Call || self.expression instanceof AST_Lambda) {
+            output.add_mapping(self.start);
+        }
+        if (self.optional) output.print("?.");
+        output.with_parens(function() {
+            self.args.forEach(function(expr, i) {
+                if (i) output.comma();
+                expr.print(output);
+            });
+        });
+    });
+    DEFPRINT(AST_New, function(self, output) {
+        output.print("new");
+        output.space();
+        AST_Call.prototype._codegen(self, output);
+    });
+
+    AST_Sequence.DEFMETHOD("_do_print", function(output) {
+        this.expressions.forEach(function(node, index) {
+            if (index > 0) {
+                output.comma();
+                if (output.should_break()) {
+                    output.newline();
+                    output.indent();
+                }
+            }
+            node.print(output);
+        });
+    });
+    DEFPRINT(AST_Sequence, function(self, output) {
+        self._do_print(output);
+        // var p = output.parent();
+        // if (p instanceof AST_Statement) {
+        //     output.with_indent(output.next_indent(), function(){
+        //         self._do_print(output);
+        //     });
+        // } else {
+        //     self._do_print(output);
+        // }
+    });
+    DEFPRINT(AST_Dot, function(self, output) {
+        var expr = self.expression;
+        expr.print(output);
+        var prop = self.property;
+        var print_computed = ALL_RESERVED_WORDS.has(prop)
+            ? output.option("ie8")
+            : !is_identifier_string(
+                prop,
+                output.option("ecma") >= 2015 && !output.option("safari10")
+            );
+
+        if (self.optional) output.print("?.");
+
+        if (print_computed) {
+            output.print("[");
+            output.add_mapping(self.end);
+            output.print_string(prop);
+            output.print("]");
+        } else {
+            if (expr instanceof AST_Number && expr.getValue() >= 0) {
+                if (!/[xa-f.)]/i.test(output.last())) {
+                    output.print(".");
+                }
+            }
+            if (!self.optional) output.print(".");
+            // the name after dot would be mapped about here.
+            output.add_mapping(self.end);
+            output.print_name(prop);
+        }
+    });
+    DEFPRINT(AST_DotHash, function(self, output) {
+        var expr = self.expression;
+        expr.print(output);
+        var prop = self.property;
+
+        if (self.optional) output.print("?");
+        output.print(".#");
+        output.add_mapping(self.end);
+        output.print_name(prop);
+    });
+    DEFPRINT(AST_Sub, function(self, output) {
+        self.expression.print(output);
+        if (self.optional) output.print("?.");
+        output.print("[");
+        self.property.print(output);
+        output.print("]");
+    });
+    DEFPRINT(AST_Chain, function(self, output) {
+        self.expression.print(output);
+    });
+    DEFPRINT(AST_UnaryPrefix, function(self, output) {
+        var op = self.operator;
+        if (op === "--" && output.last().endsWith("!")) {
+            // avoid printing "<!--"
+            output.print(" ");
+        }
+        output.print(op);
+        if (/^[a-z]/i.test(op)
+            || (/[+-]$/.test(op)
+                && self.expression instanceof AST_UnaryPrefix
+                && /^[+-]/.test(self.expression.operator))) {
+            output.space();
+        }
+        self.expression.print(output);
+    });
+    DEFPRINT(AST_UnaryPostfix, function(self, output) {
+        self.expression.print(output);
+        output.print(self.operator);
+    });
+    DEFPRINT(AST_Binary, function(self, output) {
+        var op = self.operator;
+        self.left.print(output);
+        if (op[0] == ">" /* ">>" ">>>" ">" ">=" */
+            && output.last().endsWith("--")) {
+            // space is mandatory to avoid outputting -->
+            output.print(" ");
+        } else {
+            // the space is optional depending on "beautify"
+            output.space();
+        }
+        output.print(op);
+        output.space();
+        self.right.print(output);
+    });
+    DEFPRINT(AST_Conditional, function(self, output) {
+        self.condition.print(output);
+        output.space();
+        output.print("?");
+        output.space();
+        self.consequent.print(output);
+        output.space();
+        output.colon();
+        self.alternative.print(output);
+    });
+
+    /* -----[ literals ]----- */
+    DEFPRINT(AST_Array, function(self, output) {
+        output.with_square(function() {
+            var a = self.elements, len = a.length;
+            if (len > 0) output.space();
+            a.forEach(function(exp, i) {
+                if (i) output.comma();
+                exp.print(output);
+                // If the final element is a hole, we need to make sure it
+                // doesn't look like a trailing comma, by inserting an actual
+                // trailing comma.
+                if (i === len - 1 && exp instanceof AST_Hole)
+                  output.comma();
+            });
+            if (len > 0) output.space();
+        });
+    });
+    DEFPRINT(AST_Object, function(self, output) {
+        if (self.properties.length > 0) output.with_block(function() {
+            self.properties.forEach(function(prop, i) {
+                if (i) {
+                    output.print(",");
+                    output.newline();
+                }
+                output.indent();
+                prop.print(output);
+            });
+            output.newline();
+        });
+        else print_braced_empty(self, output);
+    });
+    DEFPRINT(AST_Class, function(self, output) {
+        output.print("class");
+        output.space();
+        if (self.name) {
+            self.name.print(output);
+            output.space();
+        }
+        if (self.extends) {
+            var parens = (
+                   !(self.extends instanceof AST_SymbolRef)
+                && !(self.extends instanceof AST_PropAccess)
+                && !(self.extends instanceof AST_ClassExpression)
+                && !(self.extends instanceof AST_Function)
+            );
+            output.print("extends");
+            if (parens) {
+                output.print("(");
+            } else {
+                output.space();
+            }
+            self.extends.print(output);
+            if (parens) {
+                output.print(")");
+            } else {
+                output.space();
+            }
+        }
+        if (self.properties.length > 0) output.with_block(function() {
+            self.properties.forEach(function(prop, i) {
+                if (i) {
+                    output.newline();
+                }
+                output.indent();
+                prop.print(output);
+            });
+            output.newline();
+        });
+        else output.print("{}");
+    });
+    DEFPRINT(AST_NewTarget, function(self, output) {
+        output.print("new.target");
+    });
+
+    /** Prints a prop name. Returns whether it can be used as a shorthand. */
+    function print_property_name(key, quote, output) {
+        if (output.option("quote_keys")) {
+            output.print_string(key);
+            return false;
+        }
+        if ("" + +key == key && key >= 0) {
+            if (output.option("keep_numbers")) {
+                output.print(key);
+                return false;
+            }
+            output.print(make_num(key));
+            return false;
+        }
+        var print_string = ALL_RESERVED_WORDS.has(key)
+            ? output.option("ie8")
+            : (
+                output.option("ecma") < 2015 || output.option("safari10")
+                    ? !is_basic_identifier_string(key)
+                    : !is_identifier_string(key, true)
+            );
+        if (print_string || (quote && output.option("keep_quoted_props"))) {
+            output.print_string(key, quote);
+            return false;
+        }
+        output.print_name(key);
+        return true;
+    }
+
+    DEFPRINT(AST_ObjectKeyVal, function(self, output) {
+        function get_name(self) {
+            var def = self.definition();
+            return def ? def.mangled_name || def.name : self.name;
+        }
+
+        const try_shorthand = output.option("shorthand") && !(self.key instanceof AST_Node);
+        if (
+            try_shorthand
+            && self.value instanceof AST_Symbol
+            && get_name(self.value) === self.key
+            && !ALL_RESERVED_WORDS.has(self.key)
+        ) {
+            const was_shorthand = print_property_name(self.key, self.quote, output);
+            if (!was_shorthand) {
+                output.colon();
+                self.value.print(output);
+            }
+        } else if (
+            try_shorthand
+            && self.value instanceof AST_DefaultAssign
+            && self.value.left instanceof AST_Symbol
+            && get_name(self.value.left) === self.key
+        ) {
+            const was_shorthand = print_property_name(self.key, self.quote, output);
+            if (!was_shorthand) {
+                output.colon();
+                self.value.left.print(output);
+            }
+            output.space();
+            output.print("=");
+            output.space();
+            self.value.right.print(output);
+        } else {
+            if (!(self.key instanceof AST_Node)) {
+                print_property_name(self.key, self.quote, output);
+            } else {
+                output.with_square(function() {
+                    self.key.print(output);
+                });
+            }
+            output.colon();
+            self.value.print(output);
+        }
+    });
+    DEFPRINT(AST_ClassPrivateProperty, (self, output) => {
+        if (self.static) {
+            output.print("static");
+            output.space();
+        }
+
+        output.print("#");
+        
+        print_property_name(self.key.name, undefined, output);
+
+        if (self.value) {
+            output.print("=");
+            self.value.print(output);
+        }
+
+        output.semicolon();
+    });
+    DEFPRINT(AST_ClassProperty, (self, output) => {
+        if (self.static) {
+            output.print("static");
+            output.space();
+        }
+
+        if (self.key instanceof AST_SymbolClassProperty) {
+            print_property_name(self.key.name, self.quote, output);
+        } else {
+            output.print("[");
+            self.key.print(output);
+            output.print("]");
+        }
+
+        if (self.value) {
+            output.print("=");
+            self.value.print(output);
+        }
+
+        output.semicolon();
+    });
+    AST_ObjectProperty.DEFMETHOD("_print_getter_setter", function(type, is_private, output) {
+        var self = this;
+        if (self.static) {
+            output.print("static");
+            output.space();
+        }
+        if (type) {
+            output.print(type);
+            output.space();
+        }
+        if (self.key instanceof AST_SymbolMethod) {
+            if (is_private) output.print("#");
+            print_property_name(self.key.name, self.quote, output);
+            self.key.add_source_map(output);
+        } else {
+            output.with_square(function() {
+                self.key.print(output);
+            });
+        }
+        self.value._do_print(output, true);
+    });
+    DEFPRINT(AST_ObjectSetter, function(self, output) {
+        self._print_getter_setter("set", false, output);
+    });
+    DEFPRINT(AST_ObjectGetter, function(self, output) {
+        self._print_getter_setter("get", false, output);
+    });
+    DEFPRINT(AST_PrivateSetter, function(self, output) {
+        self._print_getter_setter("set", true, output);
+    });
+    DEFPRINT(AST_PrivateGetter, function(self, output) {
+        self._print_getter_setter("get", true, output);
+    });
+    DEFPRINT(AST_ConciseMethod, function(self, output) {
+        var type;
+        if (self.value.is_generator && self.value.async) {
+            type = "async*";
+        } else if (self.value.is_generator) {
+            type = "*";
+        } else if (self.value.async) {
+            type = "async";
+        }
+        self._print_getter_setter(type, false, output);
+    });
+    DEFPRINT(AST_PrivateMethod, function(self, output) {
+        var type;
+        if (self.value.is_generator && self.value.async) {
+            type = "async*";
+        } else if (self.value.is_generator) {
+            type = "*";
+        } else if (self.value.async) {
+            type = "async";
+        }
+        self._print_getter_setter(type, true, output);
+    });
+    DEFPRINT(AST_PrivateIn, function(self, output) {
+        self.key.print(output);
+        output.space();
+        output.print("in");
+        output.space();
+        self.value.print(output);
+    });
+    DEFPRINT(AST_SymbolPrivateProperty, function(self, output) {
+        output.print("#" + self.name);
+    });
+    DEFPRINT(AST_ClassStaticBlock, function (self, output) {
+        output.print("static");
+        output.space();
+        print_braced(self, output);
+    });
+    AST_Symbol.DEFMETHOD("_do_print", function(output) {
+        var def = this.definition();
+        output.print_name(def ? def.mangled_name || def.name : this.name);
+    });
+    DEFPRINT(AST_Symbol, function (self, output) {
+        self._do_print(output);
+    });
+    DEFPRINT(AST_Hole, noop);
+    DEFPRINT(AST_This, function(self, output) {
+        output.print("this");
+    });
+    DEFPRINT(AST_Super, function(self, output) {
+        output.print("super");
+    });
+    DEFPRINT(AST_Constant, function(self, output) {
+        output.print(self.getValue());
+    });
+    DEFPRINT(AST_String, function(self, output) {
+        output.print_string(self.getValue(), self.quote, output.in_directive);
+    });
+    DEFPRINT(AST_Number, function(self, output) {
+        if ((output.option("keep_numbers") || output.use_asm) && self.raw) {
+            output.print(self.raw);
+        } else {
+            output.print(make_num(self.getValue()));
+        }
+    });
+    DEFPRINT(AST_BigInt, function(self, output) {
+        if (output.option("keep_numbers") && self.raw) {
+            output.print(self.raw);
+        } else {
+            output.print(self.getValue() + "n");
+        }
+    });
+
+    const r_slash_script = /(<\s*\/\s*script)/i;
+    const r_starts_with_script = /^\s*script/i;
+    const slash_script_replace = (_, $1) => $1.replace("/", "\\/");
+    DEFPRINT(AST_RegExp, function(self, output) {
+        let { source, flags } = self.getValue();
+        source = regexp_source_fix(source);
+        flags = flags ? sort_regexp_flags(flags) : "";
+
+        // Avoid outputting end of script tag
+        source = source.replace(r_slash_script, slash_script_replace);
+        if (r_starts_with_script.test(source) && output.last().endsWith("<")) {
+            output.print(" ");
+        }
+
+        output.print(output.to_utf8(`/${source}/${flags}`, false, true));
+
+        const parent = output.parent();
+        if (
+            parent instanceof AST_Binary
+            && /^\w/.test(parent.operator)
+            && parent.left === self
+        ) {
+            output.print(" ");
+        }
+    });
+
+    /** if, for, while, may or may not have braces surrounding its body */
+    function print_maybe_braced_body(stat, output) {
+        if (output.option("braces")) {
+            make_block(stat, output);
+        } else {
+            if (!stat || stat instanceof AST_EmptyStatement)
+                output.force_semicolon();
+            else if ((stat instanceof AST_DefinitionsLike && !(stat instanceof AST_Var)) || stat instanceof AST_Class)
+                make_block(stat, output);
+            else
+                stat.print(output);
+        }
+    }
+
+    function best_of(a) {
+        var best = a[0], len = best.length;
+        for (var i = 1; i < a.length; ++i) {
+            if (a[i].length < len) {
+                best = a[i];
+                len = best.length;
+            }
+        }
+        return best;
+    }
+
+    function make_num(num) {
+        var str = num.toString(10).replace(/^0\./, ".").replace("e+", "e");
+        var candidates = [ str ];
+        if (Math.floor(num) === num) {
+            if (num < 0) {
+                candidates.push("-0x" + (-num).toString(16).toLowerCase());
+            } else {
+                candidates.push("0x" + num.toString(16).toLowerCase());
+            }
+        }
+        var match, len, digits;
+        if (match = /^\.0+/.exec(str)) {
+            len = match[0].length;
+            digits = str.slice(len);
+            candidates.push(digits + "e-" + (digits.length + len - 1));
+        } else if (match = /0+$/.exec(str)) {
+            len = match[0].length;
+            candidates.push(str.slice(0, -len) + "e" + len);
+        } else if (match = /^(\d)\.(\d+)e(-?\d+)$/.exec(str)) {
+            candidates.push(match[1] + match[2] + "e" + (match[3] - match[2].length));
+        }
+        return best_of(candidates);
+    }
+
+    function make_block(stmt, output) {
+        if (!stmt || stmt instanceof AST_EmptyStatement)
+            output.print("{}");
+        else if (stmt instanceof AST_BlockStatement)
+            stmt.print(output);
+        else output.with_block(function() {
+            output.indent();
+            stmt.print(output);
+            output.newline();
+        });
+    }
+
+    /* -----[ source map generators ]----- */
+
+    function DEFMAP(nodetype, generator) {
+        nodetype.forEach(function(nodetype) {
+            nodetype.DEFMETHOD("add_source_map", generator);
+        });
+    }
+
+    DEFMAP([
+        // We could easily add info for ALL nodes, but it seems to me that
+        // would be quite wasteful, hence this noop in the base class.
+        AST_Node,
+        // since the label symbol will mark it
+        AST_LabeledStatement,
+        AST_Toplevel,
+    ], noop);
+
+    // XXX: I'm not exactly sure if we need it for all of these nodes,
+    // or if we should add even more.
+    DEFMAP([
+        AST_Array,
+        AST_BlockStatement,
+        AST_Catch,
+        AST_Class,
+        AST_Constant,
+        AST_Debugger,
+        AST_DefinitionsLike,
+        AST_Directive,
+        AST_Finally,
+        AST_Jump,
+        AST_Lambda,
+        AST_New,
+        AST_Object,
+        AST_StatementWithBody,
+        AST_Symbol,
+        AST_Switch,
+        AST_SwitchBranch,
+        AST_TemplateString,
+        AST_TemplateSegment,
+        AST_Try,
+    ], function(output) {
+        output.add_mapping(this.start);
+    });
+
+    DEFMAP([
+        AST_ObjectGetter,
+        AST_ObjectSetter,
+        AST_PrivateGetter,
+        AST_PrivateSetter,
+        AST_ConciseMethod,
+        AST_PrivateMethod,
+    ], function(output) {
+        output.add_mapping(this.start, false /*name handled below*/);
+    });
+
+    DEFMAP([
+        AST_SymbolMethod,
+        AST_SymbolPrivateProperty
+    ], function(output) {
+        const tok_type = this.end && this.end.type;
+        if (tok_type === "name" || tok_type === "privatename") {
+            output.add_mapping(this.end, this.name);
+        } else {
+            output.add_mapping(this.end);
+        }
+    });
+
+    DEFMAP([ AST_ObjectProperty ], function(output) {
+        output.add_mapping(this.start, this.key);
+    });
+})();
+
+const shallow_cmp = (node1, node2) => {
+    return (
+        node1 === null && node2 === null
+        || node1.TYPE === node2.TYPE && node1.shallow_cmp(node2)
+    );
+};
+
+const equivalent_to = (tree1, tree2) => {
+    if (!shallow_cmp(tree1, tree2)) return false;
+    const walk_1_state = [tree1];
+    const walk_2_state = [tree2];
+
+    const walk_1_push = walk_1_state.push.bind(walk_1_state);
+    const walk_2_push = walk_2_state.push.bind(walk_2_state);
+
+    while (walk_1_state.length && walk_2_state.length) {
+        const node_1 = walk_1_state.pop();
+        const node_2 = walk_2_state.pop();
+
+        if (!shallow_cmp(node_1, node_2)) return false;
+
+        node_1._children_backwards(walk_1_push);
+        node_2._children_backwards(walk_2_push);
+
+        if (walk_1_state.length !== walk_2_state.length) {
+            // Different number of children
+            return false;
+        }
+    }
+
+    return walk_1_state.length == 0 && walk_2_state.length == 0;
+};
+
+const pass_through = () => true;
+
+AST_Node.prototype.shallow_cmp = function () {
+    throw new Error("did not find a shallow_cmp function for " + this.constructor.name);
+};
+
+AST_Debugger.prototype.shallow_cmp = pass_through;
+
+AST_Directive.prototype.shallow_cmp = function(other) {
+    return this.value === other.value;
+};
+
+AST_SimpleStatement.prototype.shallow_cmp = pass_through;
+
+AST_Block.prototype.shallow_cmp = pass_through;
+
+AST_EmptyStatement.prototype.shallow_cmp = pass_through;
+
+AST_LabeledStatement.prototype.shallow_cmp = function(other) {
+    return this.label.name === other.label.name;
+};
+
+AST_Do.prototype.shallow_cmp = pass_through;
+
+AST_While.prototype.shallow_cmp = pass_through;
+
+AST_For.prototype.shallow_cmp = function(other) {
+    return (this.init == null ? other.init == null : this.init === other.init) && (this.condition == null ? other.condition == null : this.condition === other.condition) && (this.step == null ? other.step == null : this.step === other.step);
+};
+
+AST_ForIn.prototype.shallow_cmp = pass_through;
+
+AST_ForOf.prototype.shallow_cmp = pass_through;
+
+AST_With.prototype.shallow_cmp = pass_through;
+
+AST_Toplevel.prototype.shallow_cmp = pass_through;
+
+AST_Expansion.prototype.shallow_cmp = pass_through;
+
+AST_Lambda.prototype.shallow_cmp = function(other) {
+    return this.is_generator === other.is_generator && this.async === other.async;
+};
+
+AST_Destructuring.prototype.shallow_cmp = function(other) {
+    return this.is_array === other.is_array;
+};
+
+AST_PrefixedTemplateString.prototype.shallow_cmp = pass_through;
+
+AST_TemplateString.prototype.shallow_cmp = pass_through;
+
+AST_TemplateSegment.prototype.shallow_cmp = function(other) {
+    return this.value === other.value;
+};
+
+AST_Jump.prototype.shallow_cmp = pass_through;
+
+AST_LoopControl.prototype.shallow_cmp = pass_through;
+
+AST_Await.prototype.shallow_cmp = pass_through;
+
+AST_Yield.prototype.shallow_cmp = function(other) {
+    return this.is_star === other.is_star;
+};
+
+AST_If.prototype.shallow_cmp = function(other) {
+    return this.alternative == null ? other.alternative == null : this.alternative === other.alternative;
+};
+
+AST_Switch.prototype.shallow_cmp = pass_through;
+
+AST_SwitchBranch.prototype.shallow_cmp = pass_through;
+
+AST_Try.prototype.shallow_cmp = function(other) {
+    return (this.body === other.body) && (this.bcatch == null ? other.bcatch == null : this.bcatch === other.bcatch) && (this.bfinally == null ? other.bfinally == null : this.bfinally === other.bfinally);
+};
+
+AST_Catch.prototype.shallow_cmp = function(other) {
+    return this.argname == null ? other.argname == null : this.argname === other.argname;
+};
+
+AST_Finally.prototype.shallow_cmp = pass_through;
+
+AST_DefinitionsLike.prototype.shallow_cmp = pass_through;
+
+AST_VarDefLike.prototype.shallow_cmp = function(other) {
+    return this.value == null ? other.value == null : this.value === other.value;
+};
+
+AST_NameMapping.prototype.shallow_cmp = pass_through;
+
+AST_Import.prototype.shallow_cmp = function(other) {
+    return (this.imported_name || null) === (other.imported_name || null)
+        && (this.imported_names || null) === (other.imported_names || null)
+        && (this.attributes || null) === (other.attributes || null)
+        && (this.phase || null) === (other.phase || null);
+};
+
+AST_ImportMeta.prototype.shallow_cmp = pass_through;
+
+AST_DynamicImport.prototype.shallow_cmp = function(other) {
+    return (this.phase || null) === (other.phase || null) && this.args.length === other.args.length;
+};
+
+AST_Export.prototype.shallow_cmp = function(other) {
+    return (this.exported_definition == null ? other.exported_definition == null : this.exported_definition === other.exported_definition) && (this.exported_value == null ? other.exported_value == null : this.exported_value === other.exported_value) && (this.exported_names == null ? other.exported_names == null : this.exported_names === other.exported_names) && (this.attributes == null ? other.attributes == null : this.attributes === other.attributes) && this.module_name === other.module_name && this.is_default === other.is_default;
+};
+
+AST_Call.prototype.shallow_cmp = pass_through;
+
+AST_Sequence.prototype.shallow_cmp = pass_through;
+
+AST_PropAccess.prototype.shallow_cmp = pass_through;
+
+AST_Chain.prototype.shallow_cmp = pass_through;
+
+AST_Dot.prototype.shallow_cmp = function(other) {
+    return (
+        this.property === other.property
+        && !!this.quote === !!other.quote
+    );
+};
+
+AST_DotHash.prototype.shallow_cmp = function(other) {
+    return this.property === other.property;
+};
+
+AST_Unary.prototype.shallow_cmp = function(other) {
+    return this.operator === other.operator;
+};
+
+AST_Binary.prototype.shallow_cmp = function(other) {
+    return this.operator === other.operator;
+};
+
+AST_PrivateIn.prototype.shallow_cmp = pass_through;
+
+AST_Conditional.prototype.shallow_cmp = pass_through;
+
+AST_Array.prototype.shallow_cmp = pass_through;
+
+AST_Object.prototype.shallow_cmp = pass_through;
+
+AST_ObjectProperty.prototype.shallow_cmp = pass_through;
+
+AST_ObjectKeyVal.prototype.shallow_cmp = function(other) {
+    return this.key === other.key && this.quote === other.quote;
+};
+
+AST_ObjectSetter.prototype.shallow_cmp = function(other) {
+    return this.static === other.static;
+};
+
+AST_ObjectGetter.prototype.shallow_cmp = function(other) {
+    return this.static === other.static;
+};
+
+AST_ConciseMethod.prototype.shallow_cmp = function(other) {
+    return this.static === other.static;
+};
+
+AST_PrivateMethod.prototype.shallow_cmp = function(other) {
+    return this.static === other.static;
+};
+
+AST_Class.prototype.shallow_cmp = function(other) {
+    return (this.name == null ? other.name == null : this.name === other.name) && (this.extends == null ? other.extends == null : this.extends === other.extends);
+};
+
+AST_ClassProperty.prototype.shallow_cmp = function(other) {
+    return this.static === other.static
+        && (typeof this.key === "string"
+            ? this.key === other.key
+            : true /* AST_Node handled elsewhere */);
+};
+
+AST_ClassPrivateProperty.prototype.shallow_cmp = function(other) {
+    return this.static === other.static;
+};
+
+AST_Symbol.prototype.shallow_cmp = function(other) {
+    return this.name === other.name;
+};
+
+AST_NewTarget.prototype.shallow_cmp = pass_through;
+
+AST_This.prototype.shallow_cmp = pass_through;
+
+AST_Super.prototype.shallow_cmp = pass_through;
+
+AST_String.prototype.shallow_cmp = function(other) {
+    return this.value === other.value;
+};
+
+AST_Number.prototype.shallow_cmp = function(other) {
+    return this.value === other.value;
+};
+
+AST_BigInt.prototype.shallow_cmp = function(other) {
+    return this.value === other.value;
+};
+
+AST_RegExp.prototype.shallow_cmp = function (other) {
+    return (
+        this.value.flags === other.value.flags
+        && this.value.source === other.value.source
+    );
+};
+
+AST_Atom.prototype.shallow_cmp = pass_through;
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+const MASK_EXPORT_DONT_MANGLE = 1 << 0;
+const MASK_EXPORT_WANT_MANGLE = 1 << 1;
+
+let function_defs = null;
+let unmangleable_names = null;
+/**
+ * When defined, there is a function declaration somewhere that's inside of a block.
+ * See https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-block-level-function-declarations-web-legacy-compatibility-semantics
+*/
+let scopes_with_block_defuns = null;
+
+class SymbolDef {
+    constructor(scope, orig, init) {
+        this.name = orig.name;
+        this.orig = [ orig ];
+        this.init = init;
+        this.eliminated = 0;
+        this.assignments = 0;
+        this.scope = scope;
+        this.replaced = 0;
+        this.global = false;
+        this.export = 0;
+        this.mangled_name = null;
+        this.undeclared = false;
+        this.id = SymbolDef.next_id++;
+        this.chained = false;
+        this.direct_access = false;
+        this.escaped = 0;
+        this.recursive_refs = 0;
+        this.references = [];
+        this.should_replace = undefined;
+        this.single_use = false;
+        this.fixed = false;
+        Object.seal(this);
+    }
+    fixed_value() {
+        if (!this.fixed || this.fixed instanceof AST_Node) return this.fixed;
+        return this.fixed();
+    }
+    unmangleable(options) {
+        if (!options) options = {};
+
+        if (
+            function_defs &&
+            function_defs.has(this.id) &&
+            keep_name(options.keep_fnames, this.orig[0].name)
+        ) return true;
+
+        return this.global && !options.toplevel
+            || (this.export & MASK_EXPORT_DONT_MANGLE)
+            || this.undeclared
+            || !options.eval && this.scope.pinned()
+            || (this.orig[0] instanceof AST_SymbolLambda
+                  || this.orig[0] instanceof AST_SymbolDefun) && keep_name(options.keep_fnames, this.orig[0].name)
+            || this.orig[0] instanceof AST_SymbolMethod
+            || (this.orig[0] instanceof AST_SymbolClass
+                  || this.orig[0] instanceof AST_SymbolDefClass) && keep_name(options.keep_classnames, this.orig[0].name);
+    }
+    mangle(options) {
+        const cache = options.cache && options.cache.props;
+        if (this.global && cache && cache.has(this.name)) {
+            this.mangled_name = cache.get(this.name);
+        } else if (!this.mangled_name && !this.unmangleable(options)) {
+            var s = this.scope;
+            var sym = this.orig[0];
+            if (options.ie8 && sym instanceof AST_SymbolLambda)
+                s = s.parent_scope;
+            const redefinition = redefined_catch_def(this);
+            this.mangled_name = redefinition
+                ? redefinition.mangled_name || redefinition.name
+                : s.next_mangled(options, this);
+            if (this.global && cache) {
+                cache.set(this.name, this.mangled_name);
+            }
+        }
+    }
+}
+
+SymbolDef.next_id = 1;
+
+function redefined_catch_def(def) {
+    if (def.orig[0] instanceof AST_SymbolCatch
+        && def.scope.is_block_scope()
+    ) {
+        return def.scope.get_defun_scope().variables.get(def.name);
+    }
+}
+
+AST_Scope.DEFMETHOD("figure_out_scope", function(options, { parent_scope = undefined, toplevel = this } = {}) {
+    options = defaults(options, {
+        cache: null,
+        ie8: false,
+        safari10: false,
+        module: false,
+    });
+
+    if (!(toplevel instanceof AST_Toplevel)) {
+        throw new Error("Invalid toplevel scope");
+    }
+
+    // pass 1: setup scope chaining and handle definitions
+    var scope = this.parent_scope = parent_scope;
+    var labels = new Map();
+    var defun = null;
+    var in_destructuring = null;
+    var for_scopes = [];
+    var tw = new TreeWalker((node, descend) => {
+        if (node.is_block_scope()) {
+            const save_scope = scope;
+            node.block_scope = scope = new AST_Scope(node);
+            scope._block_scope = true;
+            scope.init_scope_vars(save_scope);
+            scope.uses_with = save_scope.uses_with;
+            scope.uses_eval = save_scope.uses_eval;
+
+            if (options.safari10) {
+                if (node instanceof AST_For || node instanceof AST_ForIn || node instanceof AST_ForOf) {
+                    for_scopes.push(scope);
+                }
+            }
+
+            if (node instanceof AST_Switch) {
+                // XXX: HACK! Ensure the switch expression gets the correct scope (the parent scope) and the body gets the contained scope
+                // AST_Switch has a scope within the body, but it itself "is a block scope"
+                // This means the switched expression has to belong to the outer scope
+                // while the body inside belongs to the switch itself.
+                // This is pretty nasty and warrants an AST change
+                const the_block_scope = scope;
+                scope = save_scope;
+                node.expression.walk(tw);
+                scope = the_block_scope;
+                for (let i = 0; i < node.body.length; i++) {
+                    node.body[i].walk(tw);
+                }
+            } else {
+                descend();
+            }
+            scope = save_scope;
+            return true;
+        }
+        if (node instanceof AST_Destructuring) {
+            const save_destructuring = in_destructuring;
+            in_destructuring = node;
+            descend();
+            in_destructuring = save_destructuring;
+            return true;
+        }
+        if (node instanceof AST_Scope) {
+            node.init_scope_vars(scope);
+            var save_scope = scope;
+            var save_defun = defun;
+            var save_labels = labels;
+            defun = scope = node;
+            labels = new Map();
+            descend();
+            scope = save_scope;
+            defun = save_defun;
+            labels = save_labels;
+            return true;        // don't descend again in TreeWalker
+        }
+        if (node instanceof AST_LabeledStatement) {
+            var l = node.label;
+            if (labels.has(l.name)) {
+                throw new Error(string_template("Label {name} defined twice", l));
+            }
+            labels.set(l.name, l);
+            descend();
+            labels.delete(l.name);
+            return true;        // no descend again
+        }
+        if (node instanceof AST_With) {
+            for (var s = scope; s; s = s.parent_scope)
+                s.uses_with = true;
+            return;
+        }
+        if (node instanceof AST_Symbol) {
+            node.scope = scope;
+        }
+        if (node instanceof AST_Label) {
+            node.thedef = node;
+            node.references = [];
+        }
+        if (node instanceof AST_SymbolLambda) {
+            defun.def_function(node, node.name == "arguments" ? undefined : defun);
+        } else if (node instanceof AST_SymbolDefun) {
+            // Careful here, the scope where this should be defined is
+            // the parent scope.  The reason is that we enter a new
+            // scope when we encounter the AST_Defun node (which is
+            // instanceof AST_Scope) but we get to the symbol a bit
+            // later.
+            const closest_scope = defun.parent_scope;
+
+            // In strict mode, function definitions are block-scoped
+            node.scope = tw.directives["use strict"]
+                ? closest_scope
+                : closest_scope.get_defun_scope();
+
+            mark_export(node.scope.def_function(node, defun), 1);
+        } else if (node instanceof AST_SymbolClass) {
+            mark_export(defun.def_variable(node, defun), 1);
+        } else if (node instanceof AST_SymbolImport) {
+            scope.def_variable(node);
+        } else if (node instanceof AST_SymbolDefClass) {
+            // This deals with the name of the class being available
+            // inside the class.
+            mark_export((node.scope = defun.parent_scope).def_function(node, defun), 1);
+        } else if (
+            node instanceof AST_SymbolVar
+            || node instanceof AST_SymbolLet
+            || node instanceof AST_SymbolConst
+            || node instanceof AST_SymbolUsing
+            || node instanceof AST_SymbolCatch
+        ) {
+            var def;
+            if (node instanceof AST_SymbolBlockDeclaration) {
+                def = scope.def_variable(node, null);
+            } else {
+                def = defun.def_variable(node, node.TYPE == "SymbolVar" ? null : undefined);
+            }
+            if (!def.orig.every((sym) => {
+                if (sym === node) return true;
+                if (node instanceof AST_SymbolBlockDeclaration) {
+                    return sym instanceof AST_SymbolLambda;
+                }
+                return !(sym instanceof AST_SymbolLet || sym instanceof AST_SymbolConst || sym instanceof AST_SymbolUsing);
+            })) {
+                js_error(
+                    `"${node.name}" is redeclared`,
+                    node.start.file,
+                    node.start.line,
+                    node.start.col,
+                    node.start.pos
+                );
+            }
+            if (!(node instanceof AST_SymbolFunarg)) mark_export(def, 2);
+            if (defun !== scope) {
+                node.mark_enclosed();
+                var def = scope.find_variable(node);
+                if (node.thedef !== def) {
+                    node.thedef = def;
+                    node.reference();
+                }
+            }
+        } else if (node instanceof AST_LabelRef) {
+            var sym = labels.get(node.name);
+            if (!sym) throw new Error(string_template("Undefined label {name} [{line},{col}]", {
+                name: node.name,
+                line: node.start.line,
+                col: node.start.col
+            }));
+            node.thedef = sym;
+        }
+        if (!(scope instanceof AST_Toplevel) && (node instanceof AST_Export || node instanceof AST_Import)) {
+            js_error(
+                `"${node.TYPE}" statement may only appear at the top level`,
+                node.start.file,
+                node.start.line,
+                node.start.col,
+                node.start.pos
+            );
+        }
+    });
+
+    if (options.module) {
+        tw.directives["use strict"] = true;
+    }
+
+    this.walk(tw);
+
+    function mark_export(def, level) {
+        if (in_destructuring) {
+            var i = 0;
+            do {
+                level++;
+            } while (tw.parent(i++) !== in_destructuring);
+        }
+        var node = tw.parent(level);
+        if (def.export = node instanceof AST_Export ? MASK_EXPORT_DONT_MANGLE : 0) {
+            var exported = node.exported_definition;
+            if ((exported instanceof AST_Defun || exported instanceof AST_DefClass) && node.is_default) {
+                def.export = MASK_EXPORT_WANT_MANGLE;
+            }
+        }
+    }
+
+    // pass 2: find back references and eval
+    const is_toplevel = this instanceof AST_Toplevel;
+    if (is_toplevel) {
+        this.globals = new Map();
+    }
+
+    var tw = new TreeWalker(node => {
+        if (node instanceof AST_LoopControl && node.label) {
+            node.label.thedef.references.push(node);
+            return true;
+        }
+        if (node instanceof AST_SymbolRef) {
+            var name = node.name;
+            if (name == "eval" && tw.parent() instanceof AST_Call) {
+                for (var s = node.scope; s && !s.uses_eval; s = s.parent_scope) {
+                    s.uses_eval = true;
+                }
+            }
+            var sym;
+            if (tw.parent() instanceof AST_NameMapping && tw.parent(1).module_name
+                || !(sym = node.scope.find_variable(name))) {
+
+                sym = toplevel.def_global(node);
+                if (node instanceof AST_SymbolExport) sym.export = MASK_EXPORT_DONT_MANGLE;
+            } else if (sym.scope instanceof AST_Lambda && name == "arguments") {
+                sym.scope.get_defun_scope().uses_arguments = true;
+            }
+            node.thedef = sym;
+            node.reference();
+            if (node.scope.is_block_scope()
+                && !(sym.orig[0] instanceof AST_SymbolBlockDeclaration)) {
+                node.scope = node.scope.get_defun_scope();
+            }
+            return true;
+        }
+        // ensure mangling works if catch reuses a scope variable
+        var def;
+        if (node instanceof AST_SymbolCatch && (def = redefined_catch_def(node.definition()))) {
+            var s = node.scope;
+            while (s) {
+                push_uniq(s.enclosed, def);
+                if (s === def.scope) break;
+                s = s.parent_scope;
+            }
+        }
+    });
+    this.walk(tw);
+
+    // pass 3: work around IE8 and Safari catch scope bugs
+    if (options.ie8 || options.safari10) {
+        walk(this, node => {
+            if (node instanceof AST_SymbolCatch) {
+                var name = node.name;
+                var refs = node.thedef.references;
+                var scope = node.scope.get_defun_scope();
+                var def = scope.find_variable(name)
+                    || toplevel.globals.get(name)
+                    || scope.def_variable(node);
+                refs.forEach(function(ref) {
+                    ref.thedef = def;
+                    ref.reference();
+                });
+                node.thedef = def;
+                node.reference();
+                return true;
+            }
+        });
+    }
+
+    // pass 4: add symbol definitions to loop scopes
+    // Safari/Webkit bug workaround - loop init let variable shadowing argument.
+    // https://github.com/mishoo/UglifyJS2/issues/1753
+    // https://bugs.webkit.org/show_bug.cgi?id=171041
+    if (options.safari10) {
+        for (const scope of for_scopes) {
+            scope.parent_scope.variables.forEach(function(def) {
+                push_uniq(scope.enclosed, def);
+            });
+        }
+    }
+});
+
+AST_Toplevel.DEFMETHOD("def_global", function(node) {
+    var globals = this.globals, name = node.name;
+    if (globals.has(name)) {
+        return globals.get(name);
+    } else {
+        var g = new SymbolDef(this, node);
+        g.undeclared = true;
+        g.global = true;
+        globals.set(name, g);
+        return g;
+    }
+});
+
+AST_Scope.DEFMETHOD("init_scope_vars", function(parent_scope) {
+    this.variables = new Map();         // map name to AST_SymbolVar (variables defined in this scope; includes functions)
+    this.uses_with = false;             // will be set to true if this or some nested scope uses the `with` statement
+    this.uses_eval = false;             // will be set to true if this or nested scope uses the global `eval`
+    this.parent_scope = parent_scope;   // the parent scope
+    this.enclosed = [];                 // a list of variables from this or outer scope(s) that are referenced from this or inner scopes
+    this.cname = -1;                    // the current index for mangling functions/variables
+});
+
+AST_Scope.DEFMETHOD("conflicting_def", function (name) {
+    return (
+        this.enclosed.find(def => def.name === name)
+        || this.variables.has(name)
+        || (this.parent_scope && this.parent_scope.conflicting_def(name))
+    );
+});
+
+AST_Scope.DEFMETHOD("conflicting_def_shallow", function (name) {
+    return (
+        this.enclosed.find(def => def.name === name)
+        || this.variables.has(name)
+    );
+});
+
+AST_Scope.DEFMETHOD("add_child_scope", function (scope) {
+    // `scope` is going to be moved into `this` right now.
+    // Update the required scopes' information
+
+    if (scope.parent_scope === this) return;
+
+    scope.parent_scope = this;
+
+    // Propagate to this.uses_arguments from arrow functions
+    if ((scope instanceof AST_Arrow) && (this instanceof AST_Lambda && !this.uses_arguments)) {
+        this.uses_arguments = walk(scope, node => {
+            if (
+                node instanceof AST_SymbolRef
+                && node.scope instanceof AST_Lambda
+                && node.name === "arguments"
+            ) {
+                return walk_abort;
+            }
+
+            if (node instanceof AST_Lambda && !(node instanceof AST_Arrow)) {
+                return true;
+            }
+        });
+    }
+
+    this.uses_with = this.uses_with || scope.uses_with;
+    this.uses_eval = this.uses_eval || scope.uses_eval;
+
+    const scope_ancestry = (() => {
+        const ancestry = [];
+        let cur = this;
+        do {
+            ancestry.push(cur);
+        } while ((cur = cur.parent_scope));
+        ancestry.reverse();
+        return ancestry;
+    })();
+
+    const new_scope_enclosed_set = new Set(scope.enclosed);
+    const to_enclose = [];
+    for (const scope_topdown of scope_ancestry) {
+        to_enclose.forEach(e => push_uniq(scope_topdown.enclosed, e));
+        for (const def of scope_topdown.variables.values()) {
+            if (new_scope_enclosed_set.has(def)) {
+                push_uniq(to_enclose, def);
+                push_uniq(scope_topdown.enclosed, def);
+            }
+        }
+    }
+});
+
+function find_scopes_visible_from(scopes) {
+    const found_scopes = new Set();
+
+    for (const scope of new Set(scopes)) {
+        (function bubble_up(scope) {
+            if (scope == null || found_scopes.has(scope)) return;
+
+            found_scopes.add(scope);
+
+            bubble_up(scope.parent_scope);
+        })(scope);
+    }
+
+    return [...found_scopes];
+}
+
+// Creates a symbol during compression
+AST_Scope.DEFMETHOD("create_symbol", function(SymClass, {
+    source,
+    tentative_name,
+    scope,
+    conflict_scopes = [scope],
+    init = null
+} = {}) {
+    let symbol_name;
+
+    conflict_scopes = find_scopes_visible_from(conflict_scopes);
+
+    if (tentative_name) {
+        // Implement hygiene (no new names are conflicting with existing names)
+        tentative_name =
+            symbol_name =
+            tentative_name.replace(/(?:^[^a-z_$]|[^a-z0-9_$])/ig, "_");
+
+        let i = 0;
+        while (conflict_scopes.find(s => s.conflicting_def_shallow(symbol_name))) {
+            symbol_name = tentative_name + "$" + i++;
+        }
+    }
+
+    if (!symbol_name) {
+        throw new Error("No symbol name could be generated in create_symbol()");
+    }
+
+    const symbol = make_node(SymClass, source, {
+        name: symbol_name,
+        scope
+    });
+
+    this.def_variable(symbol, init || null);
+
+    symbol.mark_enclosed();
+
+    return symbol;
+});
+
+
+AST_Node.DEFMETHOD("is_block_scope", return_false);
+AST_Class.DEFMETHOD("is_block_scope", return_false);
+AST_Lambda.DEFMETHOD("is_block_scope", return_false);
+AST_Toplevel.DEFMETHOD("is_block_scope", return_false);
+AST_SwitchBranch.DEFMETHOD("is_block_scope", return_false);
+AST_Block.DEFMETHOD("is_block_scope", return_true);
+AST_Scope.DEFMETHOD("is_block_scope", function () {
+    return this._block_scope || false;
+});
+AST_IterationStatement.DEFMETHOD("is_block_scope", return_true);
+
+AST_Lambda.DEFMETHOD("init_scope_vars", function() {
+    AST_Scope.prototype.init_scope_vars.apply(this, arguments);
+    this.uses_arguments = false;
+    this.def_variable(new AST_SymbolFunarg({
+        name: "arguments",
+        start: this.start,
+        end: this.end
+    }));
+});
+
+AST_Arrow.DEFMETHOD("init_scope_vars", function() {
+    AST_Scope.prototype.init_scope_vars.apply(this, arguments);
+    this.uses_arguments = false;
+});
+
+AST_Symbol.DEFMETHOD("mark_enclosed", function() {
+    var def = this.definition();
+    var s = this.scope;
+    while (s) {
+        push_uniq(s.enclosed, def);
+        if (s === def.scope) break;
+        s = s.parent_scope;
+    }
+});
+
+AST_Symbol.DEFMETHOD("reference", function() {
+    this.definition().references.push(this);
+    this.mark_enclosed();
+});
+
+AST_Scope.DEFMETHOD("find_variable", function(name) {
+    if (name instanceof AST_Symbol) name = name.name;
+    return this.variables.get(name)
+        || (this.parent_scope && this.parent_scope.find_variable(name));
+});
+
+AST_Scope.DEFMETHOD("def_function", function(symbol, init) {
+    var def = this.def_variable(symbol, init);
+    if (!def.init || def.init instanceof AST_Defun) def.init = init;
+    return def;
+});
+
+AST_Scope.DEFMETHOD("def_variable", function(symbol, init) {
+    var def = this.variables.get(symbol.name);
+    if (def) {
+        def.orig.push(symbol);
+        if (def.init && (def.scope !== symbol.scope || def.init instanceof AST_Function)) {
+            def.init = init;
+        }
+    } else {
+        def = new SymbolDef(this, symbol, init);
+        this.variables.set(symbol.name, def);
+        def.global = !this.parent_scope;
+    }
+    return symbol.thedef = def;
+});
+
+function next_mangled(scope, options) {
+    let defun_scope;
+    if (
+        scopes_with_block_defuns
+        && (defun_scope = scope.get_defun_scope())
+        && scopes_with_block_defuns.has(defun_scope)
+    ) {
+        scope = defun_scope;
+    }
+
+    var ext = scope.enclosed;
+    var nth_identifier = options.nth_identifier;
+    out: while (true) {
+        var m = nth_identifier.get(++scope.cname);
+        if (ALL_RESERVED_WORDS.has(m)) continue; // skip over "do"
+
+        // https://github.com/mishoo/UglifyJS2/issues/242 -- do not
+        // shadow a name reserved from mangling.
+        if (options.reserved.has(m)) continue;
+
+        // Functions with short names might collide with base54 output
+        // and therefore cause collisions when keep_fnames is true.
+        if (unmangleable_names && unmangleable_names.has(m)) continue out;
+
+        // we must ensure that the mangled name does not shadow a name
+        // from some parent scope that is referenced in this or in
+        // inner scopes.
+        for (let i = ext.length; --i >= 0;) {
+            const def = ext[i];
+            const name = def.mangled_name || (def.unmangleable(options) && def.name);
+            if (m == name) continue out;
+        }
+        return m;
+    }
+}
+
+AST_Scope.DEFMETHOD("next_mangled", function(options) {
+    return next_mangled(this, options);
+});
+
+AST_Toplevel.DEFMETHOD("next_mangled", function(options) {
+    let name;
+    const mangled_names = this.mangled_names;
+    do {
+        name = next_mangled(this, options);
+    } while (mangled_names.has(name));
+    return name;
+});
+
+AST_Function.DEFMETHOD("next_mangled", function(options, def) {
+    // #179, #326
+    // in Safari strict mode, something like (function x(x){...}) is a syntax error;
+    // a function expression's argument cannot shadow the function expression's name
+
+    var tricky_def = def.orig[0] instanceof AST_SymbolFunarg && this.name && this.name.definition();
+
+    // the function's mangled_name is null when keep_fnames is true
+    var tricky_name = tricky_def ? tricky_def.mangled_name || tricky_def.name : null;
+
+    while (true) {
+        var name = next_mangled(this, options);
+        if (!tricky_name || tricky_name != name)
+            return name;
+    }
+});
+
+AST_Symbol.DEFMETHOD("unmangleable", function(options) {
+    var def = this.definition();
+    return !def || def.unmangleable(options);
+});
+
+// labels are always mangleable
+AST_Label.DEFMETHOD("unmangleable", return_false);
+
+AST_Symbol.DEFMETHOD("unreferenced", function() {
+    return !this.definition().references.length && !this.scope.pinned();
+});
+
+AST_Symbol.DEFMETHOD("definition", function() {
+    return this.thedef;
+});
+
+AST_Symbol.DEFMETHOD("global", function() {
+    return this.thedef.global;
+});
+
+/**
+ * Format the mangler options (if any) into their appropriate types
+ */
+function format_mangler_options(options) {
+    options = defaults(options, {
+        eval        : false,
+        nth_identifier : base54,
+        ie8         : false,
+        keep_classnames: false,
+        keep_fnames : false,
+        module      : false,
+        reserved    : [],
+        toplevel    : false,
+    });
+    if (options.module) options.toplevel = true;
+    if (!Array.isArray(options.reserved)
+        && !(options.reserved instanceof Set)
+    ) {
+        options.reserved = [];
+    }
+    options.reserved = new Set(options.reserved);
+    // Never mangle arguments
+    options.reserved.add("arguments");
+    return options;
+}
+
+AST_Toplevel.DEFMETHOD("mangle_names", function(options) {
+    options = format_mangler_options(options);
+    var nth_identifier = options.nth_identifier;
+
+    // We only need to mangle declaration nodes.  Special logic wired
+    // into the code generator will display the mangled name if it's
+    // present (and for AST_SymbolRef-s it'll use the mangled name of
+    // the AST_SymbolDeclaration that it points to).
+    var lname = -1;
+    var to_mangle = [];
+
+    if (options.keep_fnames) {
+        function_defs = new Set();
+    }
+
+    const mangled_names = this.mangled_names = new Set();
+    unmangleable_names = new Set();
+
+    if (options.cache) {
+        this.globals.forEach(collect);
+        if (options.cache.props) {
+            options.cache.props.forEach(function(mangled_name) {
+                mangled_names.add(mangled_name);
+            });
+        }
+    }
+
+    var tw = new TreeWalker(function(node, descend) {
+        if (node instanceof AST_LabeledStatement) {
+            // lname is incremented when we get to the AST_Label
+            var save_nesting = lname;
+            descend();
+            lname = save_nesting;
+            return true;        // don't descend again in TreeWalker
+        }
+        if (
+            node instanceof AST_Defun
+            && !(tw.parent() instanceof AST_Scope)
+        ) {
+            scopes_with_block_defuns = scopes_with_block_defuns || new Set();
+            scopes_with_block_defuns.add(node.parent_scope.get_defun_scope());
+        }
+        if (node instanceof AST_Scope) {
+            node.variables.forEach(collect);
+            return;
+        }
+        if (node.is_block_scope()) {
+            node.block_scope.variables.forEach(collect);
+            return;
+        }
+        if (
+            function_defs
+            && node instanceof AST_VarDef
+            && node.name instanceof AST_Symbol
+            && node.value instanceof AST_Lambda
+            && !node.value.name
+            && keep_name(options.keep_fnames, node.name.name)
+        ) {
+            function_defs.add(node.name.definition().id);
+            return;
+        }
+        if (node instanceof AST_Label) {
+            let name;
+            do {
+                name = nth_identifier.get(++lname);
+            } while (ALL_RESERVED_WORDS.has(name));
+            node.mangled_name = name;
+            return true;
+        }
+        if (!(options.ie8 || options.safari10) && node instanceof AST_SymbolCatch) {
+            to_mangle.push(node.definition());
+            return;
+        }
+    });
+
+    this.walk(tw);
+
+    if (options.keep_fnames || options.keep_classnames) {
+        // Collect a set of short names which are unmangleable,
+        // for use in avoiding collisions in next_mangled.
+        to_mangle.forEach(def => {
+            if (def.name.length < 6 && def.unmangleable(options)) {
+                unmangleable_names.add(def.name);
+            }
+        });
+    }
+
+    to_mangle.forEach(def => { def.mangle(options); });
+
+    function_defs = null;
+    unmangleable_names = null;
+    scopes_with_block_defuns = null;
+
+    function collect(symbol) {
+        if (symbol.export & MASK_EXPORT_DONT_MANGLE) {
+            unmangleable_names.add(symbol.name);
+        } else if (!options.reserved.has(symbol.name)) {
+            to_mangle.push(symbol);
+        }
+    }
+});
+
+AST_Toplevel.DEFMETHOD("find_colliding_names", function(options) {
+    const cache = options.cache && options.cache.props;
+    const avoid = new Set();
+    options.reserved.forEach(to_avoid);
+    this.globals.forEach(add_def);
+    this.walk(new TreeWalker(function(node) {
+        if (node instanceof AST_Scope) node.variables.forEach(add_def);
+        if (node instanceof AST_SymbolCatch) add_def(node.definition());
+    }));
+    return avoid;
+
+    function to_avoid(name) {
+        avoid.add(name);
+    }
+
+    function add_def(def) {
+        var name = def.name;
+        if (def.global && cache && cache.has(name)) name = cache.get(name);
+        else if (!def.unmangleable(options)) return;
+        to_avoid(name);
+    }
+});
+
+AST_Toplevel.DEFMETHOD("expand_names", function(options) {
+    options = format_mangler_options(options);
+    var nth_identifier = options.nth_identifier;
+    if (nth_identifier.reset && nth_identifier.sort) {
+        nth_identifier.reset();
+        nth_identifier.sort();
+    }
+    var avoid = this.find_colliding_names(options);
+    var cname = 0;
+    this.globals.forEach(rename);
+    this.walk(new TreeWalker(function(node) {
+        if (node instanceof AST_Scope) node.variables.forEach(rename);
+        if (node instanceof AST_SymbolCatch) rename(node.definition());
+    }));
+
+    function next_name() {
+        var name;
+        do {
+            name = nth_identifier.get(cname++);
+        } while (avoid.has(name) || ALL_RESERVED_WORDS.has(name));
+        return name;
+    }
+
+    function rename(def) {
+        if (def.global && options.cache) return;
+        if (def.unmangleable(options)) return;
+        if (options.reserved.has(def.name)) return;
+        const redefinition = redefined_catch_def(def);
+        const name = def.name = redefinition ? redefinition.name : next_name();
+        def.orig.forEach(function(sym) {
+            sym.name = name;
+        });
+        def.references.forEach(function(sym) {
+            sym.name = name;
+        });
+    }
+});
+
+AST_Node.DEFMETHOD("tail_node", return_this);
+AST_Sequence.DEFMETHOD("tail_node", function() {
+    return this.expressions[this.expressions.length - 1];
+});
+
+AST_Toplevel.DEFMETHOD("compute_char_frequency", function(options) {
+    options = format_mangler_options(options);
+    var nth_identifier = options.nth_identifier;
+    if (!nth_identifier.reset || !nth_identifier.consider || !nth_identifier.sort) {
+        // If the identifier mangler is invariant, skip computing character frequency.
+        return;
+    }
+    nth_identifier.reset();
+
+    try {
+        AST_Node.prototype.print = function(stream, force_parens) {
+            this._print(stream, force_parens);
+            if (this instanceof AST_Symbol && !this.unmangleable(options)) {
+                nth_identifier.consider(this.name, -1);
+            } else if (options.properties) {
+                if (this instanceof AST_DotHash) {
+                    nth_identifier.consider("#" + this.property, -1);
+                } else if (this instanceof AST_Dot) {
+                    nth_identifier.consider(this.property, -1);
+                } else if (this instanceof AST_Sub) {
+                    skip_string(this.property);
+                }
+            }
+        };
+        nth_identifier.consider(this.print_to_string(), 1);
+    } finally {
+        AST_Node.prototype.print = AST_Node.prototype._print;
+    }
+    nth_identifier.sort();
+
+    function skip_string(node) {
+        if (node instanceof AST_String) {
+            nth_identifier.consider(node.value, -1);
+        } else if (node instanceof AST_Conditional) {
+            skip_string(node.consequent);
+            skip_string(node.alternative);
+        } else if (node instanceof AST_Sequence) {
+            skip_string(node.tail_node());
+        }
+    }
+});
+
+const base54 = (() => {
+    const leading = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_".split("");
+    const digits = "0123456789".split("");
+    let chars;
+    let frequency;
+    function reset() {
+        frequency = new Map();
+        leading.forEach(function(ch) {
+            frequency.set(ch, 0);
+        });
+        digits.forEach(function(ch) {
+            frequency.set(ch, 0);
+        });
+    }
+    function consider(str, delta) {
+        for (var i = str.length; --i >= 0;) {
+            frequency.set(str[i], frequency.get(str[i]) + delta);
+        }
+    }
+    function compare(a, b) {
+        return frequency.get(b) - frequency.get(a);
+    }
+    function sort() {
+        chars = mergeSort(leading, compare).concat(mergeSort(digits, compare));
+    }
+    // Ensure this is in a usable initial state.
+    reset();
+    sort();
+    function base54(num) {
+        var ret = "", base = 54;
+        num++;
+        do {
+            num--;
+            ret += chars[num % base];
+            num = Math.floor(num / base);
+            base = 64;
+        } while (num > 0);
+        return ret;
+    }
+
+    return {
+        get: base54,
+        consider,
+        reset,
+        sort
+    };
+})();
+
+let mangle_options = undefined;
+AST_Node.prototype.size = function (compressor, stack) {
+    mangle_options = compressor && compressor._mangle_options;
+
+    let size = 0;
+    walk_parent(this, (node, info) => {
+        size += node._size(info);
+
+        // Braceless arrow functions have fake "return" statements
+        if (node instanceof AST_Arrow && node.is_braceless()) {
+            size += node.body[0].value._size(info);
+            return true;
+        }
+    }, stack || (compressor && compressor.stack));
+
+    // just to save a bit of memory
+    mangle_options = undefined;
+
+    return size;
+};
+
+AST_Node.prototype._size = () => 0;
+
+AST_Debugger.prototype._size = () => 8;
+
+AST_Directive.prototype._size = function () {
+    // TODO string encoding stuff
+    return 2 + this.value.length;
+};
+
+/** Count commas/semicolons necessary to show a list of expressions/statements */
+const list_overhead = (array) => array.length && array.length - 1;
+
+AST_Block.prototype._size = function () {
+    return 2 + list_overhead(this.body);
+};
+
+AST_Toplevel.prototype._size = function() {
+    return list_overhead(this.body);
+};
+
+AST_EmptyStatement.prototype._size = () => 1;
+
+AST_LabeledStatement.prototype._size = () => 2;  // x:
+
+AST_Do.prototype._size = () => 9;
+
+AST_While.prototype._size = () => 7;
+
+AST_For.prototype._size = () => 8;
+
+AST_ForIn.prototype._size = () => 8;
+// AST_ForOf inherits ^
+
+AST_With.prototype._size = () => 6;
+
+AST_Expansion.prototype._size = () => 3;
+
+const lambda_modifiers = func =>
+    (func.is_generator ? 1 : 0) + (func.async ? 6 : 0);
+
+AST_Accessor.prototype._size = function () {
+    return lambda_modifiers(this) + 4 + list_overhead(this.argnames) + list_overhead(this.body);
+};
+
+AST_Function.prototype._size = function (info) {
+    const first = !!first_in_statement(info);
+    return (first * 2) + lambda_modifiers(this) + 12 + list_overhead(this.argnames) + list_overhead(this.body);
+};
+
+AST_Defun.prototype._size = function () {
+    return lambda_modifiers(this) + 13 + list_overhead(this.argnames) + list_overhead(this.body);
+};
+
+AST_Arrow.prototype._size = function () {
+    let args_and_arrow = 2 + list_overhead(this.argnames);
+
+    if (
+        !(
+            this.argnames.length === 1
+            && this.argnames[0] instanceof AST_Symbol
+        )
+    ) {
+        args_and_arrow += 2; // parens around the args
+    }
+
+    const body_overhead = this.is_braceless() ? 0 : list_overhead(this.body) + 2;
+
+    return lambda_modifiers(this) + args_and_arrow + body_overhead;
+};
+
+AST_Destructuring.prototype._size = () => 2;
+
+AST_TemplateString.prototype._size = function () {
+    return 2 + (Math.floor(this.segments.length / 2) * 3);  /* "${}" */
+};
+
+AST_TemplateSegment.prototype._size = function () {
+    return this.value.length;
+};
+
+AST_Return.prototype._size = function () {
+    return this.value ? 7 : 6;
+};
+
+AST_Throw.prototype._size = () => 6;
+
+AST_Break.prototype._size = function () {
+    return this.label ? 6 : 5;
+};
+
+AST_Continue.prototype._size = function () {
+    return this.label ? 9 : 8;
+};
+
+AST_If.prototype._size = () => 4;
+
+AST_Switch.prototype._size = function () {
+    return 8 + list_overhead(this.body);
+};
+
+AST_Case.prototype._size = function () {
+    return 5 + list_overhead(this.body);
+};
+
+AST_Default.prototype._size = function () {
+    return 8 + list_overhead(this.body);
+};
+
+AST_Try.prototype._size = () => 3;
+
+AST_Catch.prototype._size = function () {
+    let size = 7 + list_overhead(this.body);
+    if (this.argname) {
+        size += 2;
+    }
+    return size;
+};
+
+AST_Finally.prototype._size = function () {
+    return 7 + list_overhead(this.body);
+};
+
+AST_Var.prototype._size = function () {
+    return 4 + list_overhead(this.definitions);
+};
+
+AST_Let.prototype._size = function () {
+    return 4 + list_overhead(this.definitions);
+};
+
+AST_Const.prototype._size = function () {
+    return 6 + list_overhead(this.definitions);
+};
+
+AST_Using.prototype._size = function () {
+    const await_size = this.await ? 6 : 0;
+    return await_size + 6 + list_overhead(this.definitions);
+};
+
+AST_VarDefLike.prototype._size = function () {
+    return this.value ? 1 : 0;
+};
+
+AST_NameMapping.prototype._size = function () {
+    // foreign name isn't mangled
+    return this.name ? 4 : 0;
+};
+
+AST_Import.prototype._size = function () {
+    // import
+    let size = 6;
+
+    if (this.imported_name) size += 1;
+
+    // from
+    if (this.imported_name || this.imported_names) size += 5;
+
+    // braces, and the commas
+    if (this.imported_names) {
+        size += 2 + list_overhead(this.imported_names);
+    }
+
+    return size;
+};
+
+AST_ImportMeta.prototype._size = () => 11;
+
+AST_DynamicImport.prototype._size = function () {
+    // `import.` + phase + `()` + arg overhead
+    return 9 + this.phase.length + list_overhead(this.args);
+};
+
+AST_Export.prototype._size = function () {
+    let size = 7 + (this.is_default ? 8 : 0);
+
+    if (this.exported_value) {
+        size += this.exported_value._size();
+    }
+
+    if (this.exported_names) {
+        // Braces and commas
+        size += 2 + list_overhead(this.exported_names);
+    }
+
+    if (this.module_name) {
+        // "from "
+        size += 5;
+    }
+
+    return size;
+};
+
+AST_Call.prototype._size = function () {
+    if (this.optional) {
+        return 4 + list_overhead(this.args);
+    }
+    return 2 + list_overhead(this.args);
+};
+
+AST_New.prototype._size = function () {
+    return 6 + list_overhead(this.args);
+};
+
+AST_Sequence.prototype._size = function () {
+    return list_overhead(this.expressions);
+};
+
+AST_Dot.prototype._size = function () {
+    if (this.optional) {
+        return this.property.length + 2;
+    }
+    return this.property.length + 1;
+};
+
+AST_DotHash.prototype._size = function () {
+    if (this.optional) {
+        return this.property.length + 3;
+    }
+    return this.property.length + 2;
+};
+
+AST_Sub.prototype._size = function () {
+    return this.optional ? 4 : 2;
+};
+
+AST_Unary.prototype._size = function () {
+    if (this.operator === "typeof") return 7;
+    if (this.operator === "void") return 5;
+    return this.operator.length;
+};
+
+AST_Binary.prototype._size = function (info) {
+    if (this.operator === "in") return 4;
+
+    let size = this.operator.length;
+
+    if (
+        (this.operator === "+" || this.operator === "-")
+        && this.right instanceof AST_Unary && this.right.operator === this.operator
+    ) {
+        // 1+ +a > needs space between the +
+        size += 1;
+    }
+
+    if (this.needs_parens(info)) {
+        size += 2;
+    }
+
+    return size;
+};
+
+AST_Conditional.prototype._size = () => 3;
+
+AST_Array.prototype._size = function () {
+    return 2 + list_overhead(this.elements);
+};
+
+AST_Object.prototype._size = function (info) {
+    let base = 2;
+    if (first_in_statement(info)) {
+        base += 2; // parens
+    }
+    return base + list_overhead(this.properties);
+};
+
+/*#__INLINE__*/
+const key_size = key =>
+    typeof key === "string" ? key.length : 0;
+
+AST_ObjectKeyVal.prototype._size = function () {
+    return key_size(this.key) + 1;
+};
+
+/*#__INLINE__*/
+const static_size = is_static => is_static ? 7 : 0;
+
+AST_ObjectGetter.prototype._size = function () {
+    return 5 + static_size(this.static) + key_size(this.key);
+};
+
+AST_ObjectSetter.prototype._size = function () {
+    return 5 + static_size(this.static) + key_size(this.key);
+};
+
+AST_ConciseMethod.prototype._size = function () {
+    return static_size(this.static) + key_size(this.key);
+};
+
+AST_PrivateMethod.prototype._size = function () {
+    return AST_ConciseMethod.prototype._size.call(this) + 1;
+};
+
+AST_PrivateGetter.prototype._size = function () {
+    return AST_ConciseMethod.prototype._size.call(this) + 4;
+};
+
+AST_PrivateSetter.prototype._size = function () {
+    return AST_ConciseMethod.prototype._size.call(this) + 4;
+};
+
+AST_PrivateIn.prototype._size = function () {
+    return 5; // "#", and " in "
+};
+
+AST_Class.prototype._size = function () {
+    return (
+        (this.name ? 8 : 7)
+        + (this.extends ? 8 : 0)
+    );
+};
+
+AST_ClassStaticBlock.prototype._size = function () {
+    // "static{}" + semicolons
+    return 8 + list_overhead(this.body);
+};
+
+AST_ClassProperty.prototype._size = function () {
+    return (
+        static_size(this.static)
+        + (typeof this.key === "string" ? this.key.length + 2 : 0)
+        + (this.value ? 1 : 0)
+    );
+};
+
+AST_ClassPrivateProperty.prototype._size = function () {
+    return AST_ClassProperty.prototype._size.call(this) + 1;
+};
+
+AST_Symbol.prototype._size = function () {
+    if (!(mangle_options && this.thedef && !this.thedef.unmangleable(mangle_options))) {
+        return this.name.length;
+    } else {
+        return 1;
+    }
+};
+
+// TODO take propmangle into account
+AST_SymbolClassProperty.prototype._size = function () {
+    return this.name.length;
+};
+
+AST_SymbolRef.prototype._size = AST_SymbolDeclaration.prototype._size = function () {
+    if (this.name === "arguments") return 9;
+
+    return AST_Symbol.prototype._size.call(this);
+};
+
+AST_NewTarget.prototype._size = () => 10;
+
+AST_SymbolImportForeign.prototype._size = function () {
+    return this.name.length;
+};
+
+AST_SymbolExportForeign.prototype._size = function () {
+    return this.name.length;
+};
+
+AST_This.prototype._size = () => 4;
+
+AST_Super.prototype._size = () => 5;
+
+AST_String.prototype._size = function () {
+    return this.value.length + 2;
+};
+
+AST_Number.prototype._size = function () {
+    const { value } = this;
+    if (value === 0) return 1;
+    if (value > 0 && Math.floor(value) === value) {
+        return Math.floor(Math.log10(value) + 1);
+    }
+    return value.toString().length;
+};
+
+AST_BigInt.prototype._size = function () {
+    return this.value.length;
+};
+
+AST_RegExp.prototype._size = function () {
+    return this.value.toString().length;
+};
+
+AST_Null.prototype._size = () => 4;
+
+AST_NaN.prototype._size = () => 3;
+
+AST_Undefined.prototype._size = () => 6; // "void 0"
+
+AST_Hole.prototype._size = () => 0;  // comma is taken into account by list_overhead()
+
+AST_Infinity.prototype._size = () => 8;
+
+AST_True.prototype._size = () => 4;
+
+AST_False.prototype._size = () => 5;
+
+AST_Await.prototype._size = () => 6;
+
+AST_Yield.prototype._size = () => 6;
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+// bitfield flags to be stored in node.flags.
+// These are set and unset during compression, and store information in the node without requiring multiple fields.
+const UNUSED = 0b00000001;
+const TRUTHY = 0b00000010;
+const FALSY = 0b00000100;
+const UNDEFINED = 0b00001000;
+const INLINED = 0b00010000;
+// Nodes to which values are ever written. Used when keep_assign is part of the unused option string.
+const WRITE_ONLY = 0b00100000;
+
+// information specific to a single compression pass
+const SQUEEZED = 0b0000000100000000;
+const OPTIMIZED = 0b0000001000000000;
+const TOP = 0b0000010000000000;
+const CLEAR_BETWEEN_PASSES = SQUEEZED | OPTIMIZED | TOP;
+
+const has_flag = (node, flag) => node.flags & flag;
+const set_flag = (node, flag) => { node.flags |= flag; };
+const clear_flag = (node, flag) => { node.flags &= ~flag; };
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+function merge_sequence(array, node) {
+    if (node instanceof AST_Sequence) {
+        array.push(...node.expressions);
+    } else {
+        array.push(node);
+    }
+    return array;
+}
+
+function make_sequence(orig, expressions) {
+    if (expressions.length == 1) return expressions[0];
+    if (expressions.length == 0) throw new Error("trying to create a sequence with length zero!");
+    return make_node(AST_Sequence, orig, {
+        expressions: expressions.reduce(merge_sequence, [])
+    });
+}
+
+function make_empty_function(self) {
+    return make_node(AST_Function, self, {
+        uses_arguments: false,
+        argnames: [],
+        body: [],
+        is_generator: false,
+        async: false,
+        variables: new Map(),
+        uses_with: false,
+        uses_eval: false,
+        parent_scope: null,
+        enclosed: [],
+        cname: 0,
+        block_scope: undefined,
+    });
+}
+
+function make_node_from_constant(val, orig) {
+    switch (typeof val) {
+      case "string":
+        return make_node(AST_String, orig, {
+            value: val
+        });
+      case "number":
+        if (isNaN(val)) return make_node(AST_NaN, orig);
+        if (isFinite(val)) {
+            return 1 / val < 0 ? make_node(AST_UnaryPrefix, orig, {
+                operator: "-",
+                expression: make_node(AST_Number, orig, { value: -val })
+            }) : make_node(AST_Number, orig, { value: val });
+        }
+        return val < 0 ? make_node(AST_UnaryPrefix, orig, {
+            operator: "-",
+            expression: make_node(AST_Infinity, orig)
+        }) : make_node(AST_Infinity, orig);
+      case "bigint":
+        return make_node(AST_BigInt, orig, { value: val.toString() });
+      case "boolean":
+        return make_node(val ? AST_True : AST_False, orig);
+      case "undefined":
+        return make_void_0(orig);
+      default:
+        if (val === null) {
+            return make_node(AST_Null, orig, { value: null });
+        }
+        if (val instanceof RegExp) {
+            return make_node(AST_RegExp, orig, {
+                value: {
+                    source: regexp_source_fix(val.source),
+                    flags: val.flags
+                }
+            });
+        }
+        throw new Error(string_template("Can't handle constant of type: {type}", {
+            type: typeof val
+        }));
+    }
+}
+
+function best_of_expression(ast1, ast2) {
+    return ast1.size() > ast2.size() ? ast2 : ast1;
+}
+
+function best_of_statement(ast1, ast2) {
+    return best_of_expression(
+        make_node(AST_SimpleStatement, ast1, {
+            body: ast1
+        }),
+        make_node(AST_SimpleStatement, ast2, {
+            body: ast2
+        })
+    ).body;
+}
+
+/** Find which node is smaller, and return that */
+function best_of(compressor, ast1, ast2) {
+    if (first_in_statement(compressor)) {
+        return best_of_statement(ast1, ast2);
+    } else {
+        return best_of_expression(ast1, ast2);
+    }
+}
+
+/** Simplify an object property's key, if possible */
+function get_simple_key(key) {
+    if (key instanceof AST_Constant) {
+        return key.getValue();
+    }
+    if (key instanceof AST_UnaryPrefix
+        && key.operator == "void"
+        && key.expression instanceof AST_Constant) {
+        return undefined;
+    }
+    return key;
+}
+
+function read_property(obj, key) {
+    key = get_simple_key(key);
+    if (key instanceof AST_Node) return;
+
+    var value;
+    if (obj instanceof AST_Array) {
+        var elements = obj.elements;
+        if (key == "length") return make_node_from_constant(elements.length, obj);
+        if (typeof key == "number" && key in elements) value = elements[key];
+    } else if (obj instanceof AST_Object) {
+        key = "" + key;
+        var props = obj.properties;
+        for (var i = props.length; --i >= 0;) {
+            var prop = props[i];
+            if (!(prop instanceof AST_ObjectKeyVal)) return;
+            if (!value && props[i].key === key) value = props[i].value;
+        }
+    }
+
+    return value instanceof AST_SymbolRef && value.fixed_value() || value;
+}
+
+function has_break_or_continue(loop, parent) {
+    var found = false;
+    var tw = new TreeWalker(function(node) {
+        if (found || node instanceof AST_Scope) return true;
+        if (node instanceof AST_LoopControl && tw.loopcontrol_target(node) === loop) {
+            return found = true;
+        }
+    });
+    if (parent instanceof AST_LabeledStatement) tw.push(parent);
+    tw.push(loop);
+    loop.body.walk(tw);
+    return found;
+}
+
+// we shouldn't compress (1,func)(something) to
+// func(something) because that changes the meaning of
+// the func (becomes lexical instead of global).
+function maintain_this_binding(parent, orig, val) {
+    if (requires_sequence_to_maintain_binding(parent, orig, val)) {
+        const zero = make_node(AST_Number, orig, { value: 0 });
+        return make_sequence(orig, [ zero, val ]);
+    } else {
+        return val;
+    }
+}
+
+/** Detect (1, x.noThis)(), (0, eval)(), which need sequences */
+function requires_sequence_to_maintain_binding(parent, orig, val) {
+    return (
+        parent instanceof AST_UnaryPrefix && parent.operator == "delete"
+        || parent instanceof AST_Call && parent.expression === orig
+            && (
+                val instanceof AST_Chain
+                || val instanceof AST_PropAccess
+                || val instanceof AST_SymbolRef && val.name == "eval"
+            )
+    );
+}
+
+function is_func_expr(node) {
+    return node instanceof AST_Arrow || node instanceof AST_Function;
+}
+
+/**
+ * Used to determine whether the node can benefit from negation.
+ * Not the case with arrow functions (you need an extra set of parens). */
+function is_iife_call(node) {
+    if (node.TYPE != "Call") return false;
+    return node.expression instanceof AST_Function || is_iife_call(node.expression);
+}
+
+function is_empty(thing) {
+    if (thing === null) return true;
+    if (thing instanceof AST_EmptyStatement) return true;
+    if (thing instanceof AST_BlockStatement) return thing.body.length == 0;
+    return false;
+}
+
+const identifier_atom = makePredicate("Infinity NaN undefined");
+function is_identifier_atom(node) {
+    return node instanceof AST_Infinity
+        || node instanceof AST_NaN
+        || node instanceof AST_Undefined;
+}
+
+/** Check if this is a SymbolRef node which has one def of a certain AST type */
+function is_ref_of(ref, type) {
+    if (!(ref instanceof AST_SymbolRef)) return false;
+    var orig = ref.definition().orig;
+    for (var i = orig.length; --i >= 0;) {
+        if (orig[i] instanceof type) return true;
+    }
+}
+
+/**Can we turn { block contents... } into just the block contents ?
+ * Not if one of these is inside.
+ **/
+function can_be_evicted_from_block(node) {
+    return !(
+        node instanceof AST_DefClass ||
+        node instanceof AST_Defun ||
+        node instanceof AST_Let ||
+        node instanceof AST_Const ||
+        node instanceof AST_Using ||
+        node instanceof AST_Export ||
+        node instanceof AST_Import
+    );
+}
+
+function as_statement_array(thing) {
+    if (thing === null) return [];
+    if (thing instanceof AST_BlockStatement) return thing.body;
+    if (thing instanceof AST_EmptyStatement) return [];
+    if (thing instanceof AST_Statement) return [ thing ];
+    throw new Error("Can't convert thing to statement array");
+}
+
+function is_reachable(scope_node, defs) {
+    const find_ref = node => {
+        if (node instanceof AST_SymbolRef && defs.includes(node.definition())) {
+            return walk_abort;
+        }
+    };
+
+    return walk_parent(scope_node, (node, info) => {
+        if (node instanceof AST_Scope && node !== scope_node) {
+            var parent = info.parent();
+
+            if (
+                parent instanceof AST_Call
+                && parent.expression === node
+                // Async/Generators aren't guaranteed to sync evaluate all of
+                // their body steps, so it's possible they close over the variable.
+                && !(node.async || node.is_generator)
+            ) {
+                return;
+            }
+
+            if (walk(node, find_ref)) return walk_abort;
+
+            return true;
+        }
+    });
+}
+
+/** Check if a ref refers to the name of a function/class it's defined within */
+function is_recursive_ref(tw, def) {
+    var node;
+    for (var i = 0; node = tw.parent(i); i++) {
+        if (node instanceof AST_Lambda || node instanceof AST_Class) {
+            var name = node.name;
+            if (name && name.definition() === def) {
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
+// TODO this only works with AST_Defun, shouldn't it work for other ways of defining functions?
+function retain_top_func(fn, compressor) {
+    return compressor.top_retain
+        && fn instanceof AST_Defun
+        && has_flag(fn, TOP)
+        && fn.name
+        && compressor.top_retain(fn.name.definition());
+}
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+// Lists of native methods, useful for `unsafe` option which assumes they exist.
+// Note: Lots of methods and functions are missing here, in case they aren't pure
+// or not available in all JS environments.
+
+const make_nested_lookup = (feature_callback) => (compressor) => {
+    const obj = feature_callback(feature_variables(compressor));
+
+    const out = new Map();
+    for (var key of Object.keys(obj)) {
+        if (obj[key]) {
+            out.set(key, makePredicate(remove_false(obj[key])));
+        }
+    }
+
+    const does_have = (global_name, fname) => {
+        const inner_map = out.get(global_name);
+        return inner_map != null && inner_map.has(fname);
+    };
+    return does_have;
+};
+
+const make_lookup = (feature_callback) => (compressor) => {
+    const obj = feature_callback(feature_variables(compressor));
+
+    const predicate = makePredicate(remove_false(obj));
+    const does_have = (global_name) => {
+        return predicate.has(global_name);
+    };
+    return does_have;
+};
+
+function remove_false(arr) {
+    for (let i = 0; i < arr.length; i++) {
+        if (arr[i] === false) {
+            arr.splice(i, 1);
+            i--;
+        }
+    }
+    return arr;
+}
+
+/** Generate the object with arguments seen below */
+function feature_variables(compressor) {
+    return {
+        sloppy: compressor.option("unsafe"),
+        es: compressor.option("builtins_ecma"),
+    };
+}
+
+// eslint-disable-next-line no-unused-vars
+const pure_access_globals = make_lookup(({ sloppy, es }) => [
+    "Array",
+    "Boolean",
+    "clearInterval",
+    "clearTimeout",
+    "console",
+    "Date",
+    "decodeURI",
+    "decodeURIComponent",
+    "encodeURI",
+    "encodeURIComponent",
+    "Error",
+    "escape",
+    "eval",
+    "EvalError",
+    "Function",
+    es >= 2020 && "globalThis",
+    "isFinite",
+    "isNaN",
+    "JSON",
+    "Math",
+    "Number",
+    "parseFloat",
+    "parseInt",
+    "RangeError",
+    "ReferenceError",
+    "RegExp",
+    "Object",
+    "setInterval",
+    "setTimeout",
+    "String",
+    "SyntaxError",
+    "TypeError",
+    "unescape",
+    "URIError",
+]);
+
+// Objects which are safe to access without throwing or causing a side effect.
+// Usually we'd check the `unsafe` option first but these are way too common for that
+const pure_prop_access_globals = new Set([
+    "Number",
+    "String",
+    "Array",
+    "Object",
+    "Function",
+    "Promise",
+]);
+
+// eslint-disable-next-line no-unused-vars
+const is_pure_native_fn = make_lookup(({ sloppy, es }) => [
+    sloppy && es >= 2021 && "AggregateError",
+    "Array",
+    "ArrayBuffer",
+    es >= 2020 && "BigInt",
+    es >= 2020 && "BigInt64Array",
+    es >= 2020 && "BigUint64Array",
+    "Boolean",
+    "Date",
+    sloppy && "decodeURI",
+    sloppy && "decodeURIComponent",
+    sloppy && "encodeURI",
+    sloppy && "encodeURIComponent",
+    "Error",
+    "escape",
+    "EvalError",
+    es >= 2021 && "FinalizationRegistry",
+    es >= 2026 && "Float16Array",
+    "Float32Array",
+    "Float64Array",
+    "Int16Array",
+    "Int32Array",
+    "Int8Array",
+    "isFinite",
+    "isNaN",
+    es >= 2026 && "Iterator",
+    es >= 2015 && "Map",
+    "Number",
+    "parseFloat",
+    "parseInt",
+    es >= 2015 && "Promise",
+    es >= 2015 && "Proxy",
+    "RangeError",
+    "ReferenceError",
+    sloppy && "RegExp",
+    es >= 2015 && "Set",
+    "String",
+    es >= 2015 && "Symbol",
+    "SyntaxError",
+    "TypeError",
+    "Uint16Array",
+    "Uint32Array",
+    "Uint8Array",
+    "Uint8ClampedArray",
+    sloppy && "unescape",
+    "URIError",
+    sloppy && es >= 2015 && "WeakMap",
+    sloppy && es >= 2021 && "WeakRef",
+    sloppy && es >= 2015 && "WeakSet",
+]);
+
+const arg1_is_iterable = new Set([
+    "Map",
+    "Set",
+    "WeakMap",
+    "WeakSet",
+]);
+const arg1_is_range_or_iterable = new Set([
+    "ArrayBuffer",
+    "Float32Array",
+    "Float64Array",
+    "Int16Array",
+    "Int32Array",
+    "Int8Array",
+    "Uint16Array",
+    "Uint32Array",
+    "Uint8Array",
+    "Uint8ClampedArray",
+]);
+const lone_arg_is_range = new Set(["Array"]);
+
+const object_methods = [
+    "constructor",
+    "toString",
+    "valueOf",
+];
+
+// eslint-disable-next-line no-unused-vars
+const is_pure_native_method = make_nested_lookup(({ sloppy, es }) => ({
+    Array: [
+        es >= 2022 && "at",
+        es >= 2019 && "flat",
+        es >= 2016 && "includes",
+        "indexOf",
+        "join",
+        "lastIndexOf",
+        "slice",
+        ...object_methods,
+    ],
+    Boolean: object_methods,
+    Function: object_methods,
+    Number: [
+        "toExponential",
+        "toFixed",
+        "toPrecision",
+        ...object_methods,
+    ],
+    Object: object_methods,
+    RegExp: [
+        "test",
+        ...object_methods,
+    ],
+    String: [
+        es >= 2022 && "at",
+        "charAt",
+        "charCodeAt",
+        es >= 2015 && "codePointAt",
+        "concat",
+        es >= 2025 && "endsWith",
+        es >= 2015 && "includes",
+        "indexOf",
+        "italics",
+        "lastIndexOf",
+        es >= 2020 && "localeCompare",
+        "match",
+        es >= 2020 && "matchAll",
+        es >= 2015 && "normalize",
+        es >= 2017 && "padStart",
+        es >= 2017 && "padEnd",
+        es >= 2015 && sloppy && "repeat",
+        "replace",
+        es >= 2021 && "replaceAll",
+        "search",
+        "slice",
+        "split",
+        es >= 2015 && "startsWith",
+        "substr",
+        "substring",
+        es >= 2015 && "repeat",
+        "toLocaleLowerCase",
+        "toLocaleUpperCase",
+        "toLowerCase",
+        "toUpperCase",
+        "trim",
+        es >= 2019 && "trimEnd",
+        es >= 2019 && "trimStart",
+        es >= 2019 && "trimLeft",
+        es >= 2019 && "trimRight",
+        ...object_methods,
+    ],
+}));
+
+// eslint-disable-next-line no-unused-vars
+const is_pure_native_static_fn = make_nested_lookup(({ sloppy, es }) => ({
+    Array: [
+        "isArray",
+        es >= 2015 && "of",
+    ],
+    ArrayBuffer: [
+        "isView",
+    ],
+    BigInt: es >= 2020 && [
+        sloppy && "asIntN",
+        sloppy && "asUintN",
+    ],
+    BigInt64Array: sloppy && es >= 2020 && ["of"],
+    BigUint64Array: sloppy && es >= 2020 && ["of"],
+    Date: [
+        "now",
+        "parse",
+        "UTC",
+    ],
+    Error: [
+        es >= 2026 && "isError",
+    ],
+    Float16Array: sloppy && es >= 2026 && ["of"],
+    Float32Array: sloppy && ["of"],
+    Float64Array: sloppy && ["of"],
+    Int16Array: sloppy && ["of"],
+    Int32Array: sloppy && ["of"],
+    Int8Array: sloppy && ["of"],
+    Math: [
+        "abs",
+        "acos",
+        es >= 2015 && "acosh",
+        "asin",
+        es >= 2015 && "asinh",
+        "atan",
+        "atan2",
+        es >= 2015 && "atanh",
+        es >= 2015 && "cbrt",
+        "ceil",
+        es >= 2015 && "clz32",
+        "cos",
+        es >= 2015 && "cosh",
+        "exp",
+        es >= 2015 && "expm1",
+        "floor",
+        es >= 2026 && "f16round",
+        es >= 2015 && "fround",
+        es >= 2015 && "hypot",
+        es >= 2015 && "imul",
+        "log",
+        es >= 2015 && "log10",
+        es >= 2015 && "log1p",
+        es >= 2015 && "log2",
+        "max",
+        "min",
+        "pow",
+        "round",
+        es >= 2015 && "sign",
+        "sin",
+        es >= 2015 && "sinh",
+        "sqrt",
+        "tan",
+        es >= 2015 && "tanh",
+        es >= 2015 && "trunc",
+    ],
+    Number: [
+        es >= 2015 && "isFinite",
+        es >= 2015 && "isInteger",
+        es >= 2015 && "isSafeInteger",
+        es >= 2015 && "isNaN",
+        es >= 2015 && "parseFloat",
+        es >= 2015 && "parseInt",
+    ],
+    Object: [
+        sloppy && "create",
+        sloppy && "getOwnPropertyDescriptor",
+        es >= 2017 && sloppy && "getOwnPropertyDescriptors",
+        sloppy && "getOwnPropertyNames",
+        es >= 2015 && sloppy && "getOwnPropertySymbols",
+        sloppy && "getPrototypeOf",
+        es >= 2022 && sloppy && "hasOwn",
+        es >= 2015 && "is",
+        "isExtensible",
+        "isFrozen",
+        "isSealed",
+        es >= 2015 && sloppy && "keys",
+    ],
+    Promise: es >= 2015 && [
+        es >= 2024 && "withResolvers",
+    ],
+    Proxy: es >= 2015 && [
+        sloppy && "revocable",
+    ],
+    Reflect: es >= 2015 && [
+        sloppy && "has",
+        sloppy && "isExtensible",
+        sloppy && "ownKeys",
+    ],
+    RegExp: [
+        es >= 2026 && sloppy && "escape",
+    ],
+    String: [
+        "fromCharCode",
+        sloppy && es >= 2025 && "fromCodePoint",
+    ],
+    Uint16Array: ["of"],
+    Uint32Array: ["of"],
+    Uint8Array: ["of"],
+    Uint8ClampedArray: ["of"],
+}));
+
+// Known numeric values which come with JS environments
+// eslint-disable-next-line no-unused-vars
+const is_pure_native_static_property = make_nested_lookup(({ sloppy, es }) => ({
+    Math: [
+        "E",
+        "LN10",
+        "LN2",
+        "LOG2E",
+        "LOG10E",
+        "PI",
+        "SQRT1_2",
+        "SQRT2",
+    ],
+    Number: [
+        es >= 2015 && "EPSILON",
+        es >= 2015 && "MAX_SAFE_VALUE",
+        "MAX_VALUE",
+        es >= 2015 && "MIN_SAFE_VALUE",
+        "MIN_VALUE",
+        "NaN",
+        "NEGATIVE_INFINITY",
+        "POSITIVE_INFINITY",
+    ],
+    RegExp: [
+        "$_",
+        "$0",
+        "$1",
+        "$2",
+        "$3",
+        "$4",
+        "$5",
+        "$6",
+        "$7",
+        "$8",
+        "$9",
+        "input",
+        "lastMatch",
+        "lastParen",
+        "leftContext",
+        "rightContext",
+    ],
+}));
+
+const re_uppercase_first_letter = /^[A-Z]/;
+function is_pure_builtin_call(compressor, call) {
+    let builtin = "";
+    let method = "";
+
+    let exp = call.expression;
+    if (is_undeclared_ref(exp)) {
+        builtin = exp.name;
+    } else if (exp instanceof AST_Dot) {
+        method = exp.property;
+
+        exp = exp.expression;
+        if (is_undeclared_ref(exp)) {
+            if (
+                // globalThis.pureFunc()
+                exp.name === "globalThis"
+                && compressor.option("builtins_ecma") >= 2020
+            ) {
+                builtin = method;
+                method = "";
+            } else {
+                // SomeBuiltin.pureFunc()
+                builtin = exp.name;
+            }
+        } else if (exp instanceof AST_Dot) {
+            if (
+                is_undeclared_ref(exp.expression)
+                && exp.expression.name === "globalThis"
+                && compressor.option("builtins_ecma") >= 2020
+            ) {
+                // globalThis.SomeBuiltin.pureFunc()
+                builtin = exp.property;
+            } else {
+                return false;
+            }
+        } else {
+            return false;
+        }
+    } else {
+        return false;
+    }
+
+    if (!method) {
+        if (compressor.is_pure_native_fn(builtin)) {
+            // some require `new`, others throw if you use it
+            const is_new = call instanceof AST_New;
+            const should_be_new = re_uppercase_first_letter.test(builtin); // true of all `is_pure_native_fn`
+            if (is_new !== should_be_new) return false;
+
+            if (!is_builtin_pure_with_these_args(builtin, call.args)) {
+                return false;
+            }
+
+            return true;
+        }
+
+        return false;
+    } else {
+        return compressor.is_pure_native_static_fn(builtin, method);
+    }
+}
+
+/** Some builtins are listed above but their purity is subject to some conditions */
+function is_builtin_pure_with_these_args(builtin, args) {
+    // all the builtins we deal with here are ok with getting 0 args
+    if (args.length === 0) return true;
+
+    let arg1 = args[0];
+    if (arg1 instanceof AST_SymbolRef) {
+        arg1 = arg1.fixed_value();
+    }
+
+    if (lone_arg_is_range.has(builtin)) { // new Array(number)
+        const arg_valid = args.length > 1
+            || arg1 instanceof AST_Number
+                && arg1.value >= 0 && arg1.value <= 0xffffffff;
+            // TODO: or, we are asked to ignore TypeError
+        if (!arg_valid) return false;
+    }
+
+    if (arg1_is_range_or_iterable.has(builtin)) { // new Float32Array(number | Array)
+        const arg_valid = args.length === 0
+            || arg1 instanceof AST_Array
+            || arg1 instanceof AST_Number
+                && arg1.value >= 0 && arg1.value <= 0xffffffff;
+        if (!arg_valid) return false;
+    }
+
+    if (arg1_is_iterable.has(builtin)) { // new Set(iterable)
+        const arg_valid = args.length === 0 || arg1 instanceof AST_Array;
+        if (!arg_valid) return false;
+    }
+
+    return true;
+}
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+// Functions and methods to infer certain facts about expressions
+// It's not always possible to be 100% sure about something just by static analysis,
+// so `true` means yes, and `false` means maybe
+
+const is_undeclared_ref = (node) =>
+    node instanceof AST_SymbolRef && node.definition().undeclared;
+
+const bitwise_binop = makePredicate("<<< >> << & | ^ ~");
+const lazy_op = makePredicate("&& || ??");
+const unary_side_effects = makePredicate("delete ++ --");
+
+// methods to determine whether an expression has a boolean result type
+(function(def_is_boolean) {
+    const unary_bool = makePredicate("! delete");
+    const binary_bool = makePredicate("in instanceof == != === !== < <= >= >");
+    def_is_boolean(AST_Node, return_false);
+    def_is_boolean(AST_UnaryPrefix, function() {
+        return unary_bool.has(this.operator);
+    });
+    def_is_boolean(AST_Binary, function() {
+        return binary_bool.has(this.operator)
+            || lazy_op.has(this.operator)
+                && this.left.is_boolean()
+                && this.right.is_boolean();
+    });
+    def_is_boolean(AST_Conditional, function() {
+        return this.consequent.is_boolean() && this.alternative.is_boolean();
+    });
+    def_is_boolean(AST_Assign, function() {
+        return this.operator == "=" && this.right.is_boolean();
+    });
+    def_is_boolean(AST_Sequence, function() {
+        return this.tail_node().is_boolean();
+    });
+    def_is_boolean(AST_True, return_true);
+    def_is_boolean(AST_False, return_true);
+})(function(node, func) {
+    node.DEFMETHOD("is_boolean", func);
+});
+
+// methods to determine if an expression has a numeric result type
+(function(def_is_number) {
+    def_is_number(AST_Node, return_false);
+    def_is_number(AST_Number, return_true);
+    const unary = makePredicate("+ - ~ ++ --");
+    def_is_number(AST_Unary, function(compressor) {
+        return unary.has(this.operator) && this.expression.is_number(compressor);
+    });
+    const numeric_ops = makePredicate("- * / % & | ^ << >> >>>");
+    def_is_number(AST_Binary, function(compressor) {
+        if (this.operator === "+") {
+            // Both sides need to be `number`. Or one is a `number` and the other is number-ish.
+            return this.left.is_number(compressor) && this.right.is_number_or_bigint(compressor)
+                || this.right.is_number(compressor) && this.left.is_number_or_bigint(compressor);
+        } else if (numeric_ops.has(this.operator)) {
+            return this.left.is_number(compressor) || this.right.is_number(compressor);
+        } else {
+            return false;
+        }
+    });
+    def_is_number(AST_Assign, function(compressor) {
+        return (this.operator === "=" || numeric_ops.has(this.operator.slice(0, -1)))
+            && this.right.is_number(compressor);
+    });
+    def_is_number(AST_Sequence, function(compressor) {
+        return this.tail_node().is_number(compressor);
+    });
+    def_is_number(AST_Conditional, function(compressor) {
+        return this.consequent.is_number(compressor) && this.alternative.is_number(compressor);
+    });
+})(function(node, func) {
+    node.DEFMETHOD("is_number", func);
+});
+
+// methods to determine if an expression returns a BigInt
+(function(def_is_bigint) {
+    def_is_bigint(AST_Node, return_false);
+    def_is_bigint(AST_BigInt, return_true);
+    const unary = makePredicate("+ - ~ ++ --");
+    def_is_bigint(AST_Unary, function(compressor) {
+        return unary.has(this.operator) && this.expression.is_bigint(compressor);
+    });
+    const numeric_ops = makePredicate("- * / % & | ^ << >>");
+    def_is_bigint(AST_Binary, function(compressor) {
+        if (this.operator === "+") {
+            return this.left.is_bigint(compressor) && this.right.is_number_or_bigint(compressor)
+                || this.right.is_bigint(compressor) && this.left.is_number_or_bigint(compressor);
+        } else if (numeric_ops.has(this.operator)) {
+            return this.left.is_bigint(compressor) || this.right.is_bigint(compressor);
+        } else {
+            return false;
+        }
+    });
+    def_is_bigint(AST_Assign, function(compressor) {
+        return (numeric_ops.has(this.operator.slice(0, -1)) || this.operator == "=")
+            && this.right.is_bigint(compressor);
+    });
+    def_is_bigint(AST_Sequence, function(compressor) {
+        return this.tail_node().is_bigint(compressor);
+    });
+    def_is_bigint(AST_Conditional, function(compressor) {
+        return this.consequent.is_bigint(compressor) && this.alternative.is_bigint(compressor);
+    });
+})(function(node, func) {
+    node.DEFMETHOD("is_bigint", func);
+});
+
+// methods to determine if an expression is a number or a bigint
+(function(def_is_number_or_bigint) {
+    def_is_number_or_bigint(AST_Node, return_false);
+    def_is_number_or_bigint(AST_Number, return_true);
+    def_is_number_or_bigint(AST_BigInt, return_true);
+    const numeric_unary_ops = makePredicate("+ - ~ ++ --");
+    def_is_number_or_bigint(AST_Unary, function(_compressor) {
+        return numeric_unary_ops.has(this.operator);
+    });
+    const numeric_ops = makePredicate("- * / % & | ^ << >>");
+    def_is_number_or_bigint(AST_Binary, function(compressor) {
+        return this.operator === "+"
+            ? this.left.is_number_or_bigint(compressor) && this.right.is_number_or_bigint(compressor)
+            : numeric_ops.has(this.operator);
+    });
+    def_is_number_or_bigint(AST_Assign, function(compressor) {
+        return numeric_ops.has(this.operator.slice(0, -1))
+            || this.operator == "=" && this.right.is_number_or_bigint(compressor);
+    });
+    def_is_number_or_bigint(AST_Sequence, function(compressor) {
+        return this.tail_node().is_number_or_bigint(compressor);
+    });
+    def_is_number_or_bigint(AST_Conditional, function(compressor) {
+        return this.consequent.is_number_or_bigint(compressor) && this.alternative.is_number_or_bigint(compressor);
+    });
+}(function (node, func) {
+    node.DEFMETHOD("is_number_or_bigint", func);
+}));
+
+
+// methods to determine if an expression is a 32 bit integer (IE results from bitwise ops, or is an integer constant fitting in that size
+(function(def_is_32_bit_integer) {
+    def_is_32_bit_integer(AST_Node, return_false);
+    def_is_32_bit_integer(AST_Number, function(_compressor) {
+        return this.value === (this.value | 0);
+    });
+    def_is_32_bit_integer(AST_UnaryPrefix, function(compressor) {
+        return this.operator == "~" ? this.expression.is_number(compressor)
+            : this.operator === "+" ? this.expression.is_32_bit_integer(compressor)
+            : false;
+    });
+    def_is_32_bit_integer(AST_Binary, function(compressor) {
+        return bitwise_binop.has(this.operator)
+            && (this.left.is_number(compressor) || this.right.is_number(compressor));
+    });
+}(function (node, func) {
+    node.DEFMETHOD("is_32_bit_integer", func);
+}));
+
+// methods to determine if an expression has a string result type
+(function(def_is_string) {
+    def_is_string(AST_Node, return_false);
+    def_is_string(AST_String, return_true);
+    def_is_string(AST_TemplateString, return_true);
+    def_is_string(AST_UnaryPrefix, function() {
+        return this.operator == "typeof";
+    });
+    def_is_string(AST_Binary, function(compressor) {
+        return this.operator == "+" &&
+            (this.left.is_string(compressor) || this.right.is_string(compressor));
+    });
+    def_is_string(AST_Assign, function(compressor) {
+        return (this.operator == "=" || this.operator == "+=") && this.right.is_string(compressor);
+    });
+    def_is_string(AST_Sequence, function(compressor) {
+        return this.tail_node().is_string(compressor);
+    });
+    def_is_string(AST_Conditional, function(compressor) {
+        return this.consequent.is_string(compressor) && this.alternative.is_string(compressor);
+    });
+})(function(node, func) {
+    node.DEFMETHOD("is_string", func);
+});
+
+function is_undefined(node, compressor) {
+    return (
+        has_flag(node, UNDEFINED)
+        || node instanceof AST_Undefined
+        || node instanceof AST_UnaryPrefix
+            && node.operator == "void"
+            && !node.expression.has_side_effects(compressor)
+    );
+}
+
+// Is the node explicitly null or undefined.
+function is_null_or_undefined(node, compressor) {
+    let fixed;
+    return (
+        node instanceof AST_Null
+        || is_undefined(node, compressor)
+        || (
+            node instanceof AST_SymbolRef
+            && (fixed = node.definition().fixed) instanceof AST_Node
+            && is_nullish(fixed, compressor)
+        )
+    );
+}
+
+// Find out if this expression is optionally chained from a base-point that we
+// can statically analyze as null or undefined.
+function is_nullish_shortcircuited(node, compressor) {
+    if (node instanceof AST_PropAccess || node instanceof AST_Call) {
+        return (
+            (node.optional && is_null_or_undefined(node.expression, compressor))
+            || is_nullish_shortcircuited(node.expression, compressor)
+        );
+    }
+    if (node instanceof AST_Chain) return is_nullish_shortcircuited(node.expression, compressor);
+    return false;
+}
+
+// Find out if something is == null, or can short circuit into nullish.
+// Used to optimize ?. and ??
+function is_nullish(node, compressor) {
+    if (is_null_or_undefined(node, compressor)) return true;
+    return is_nullish_shortcircuited(node, compressor);
+}
+
+// Determine if expression might cause side effects
+// If there's a possibility that a node may change something when it's executed, this returns true
+(function(def_has_side_effects) {
+    def_has_side_effects(AST_Node, return_true);
+
+    def_has_side_effects(AST_EmptyStatement, return_false);
+    def_has_side_effects(AST_Constant, return_false);
+    def_has_side_effects(AST_This, return_false);
+
+    function any(list, compressor) {
+        for (var i = list.length; --i >= 0;)
+            if (list[i].has_side_effects(compressor))
+                return true;
+        return false;
+    }
+
+    def_has_side_effects(AST_Block, function(compressor) {
+        return any(this.body, compressor);
+    });
+    def_has_side_effects(AST_Call, function(compressor) {
+        if (
+            !this.is_callee_pure(compressor)
+            && (!this.expression.is_call_pure(compressor)
+                || this.expression.has_side_effects(compressor))
+        ) {
+            return true;
+        }
+        return any(this.args, compressor);
+    });
+    def_has_side_effects(AST_Switch, function(compressor) {
+        return this.expression.has_side_effects(compressor)
+            || any(this.body, compressor);
+    });
+    def_has_side_effects(AST_Case, function(compressor) {
+        return this.expression.has_side_effects(compressor)
+            || any(this.body, compressor);
+    });
+    def_has_side_effects(AST_Try, function(compressor) {
+        return this.body.has_side_effects(compressor)
+            || this.bcatch && this.bcatch.has_side_effects(compressor)
+            || this.bfinally && this.bfinally.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_If, function(compressor) {
+        return this.condition.has_side_effects(compressor)
+            || this.body && this.body.has_side_effects(compressor)
+            || this.alternative && this.alternative.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_ImportMeta, return_false);
+    def_has_side_effects(AST_DynamicImport, function() {
+        // `import.source(x)` only compiles the module, which is side-effect free
+        return this.phase !== "source";
+    });
+    def_has_side_effects(AST_LabeledStatement, function(compressor) {
+        return this.body.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_SimpleStatement, function(compressor) {
+        return this.body.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_Lambda, return_false);
+    def_has_side_effects(AST_Class, function (compressor) {
+        if (this.extends && this.extends.has_side_effects(compressor)) {
+            return true;
+        }
+        return any(this.properties, compressor);
+    });
+    def_has_side_effects(AST_ClassStaticBlock, function(compressor) {
+        return any(this.body, compressor);
+    });
+    def_has_side_effects(AST_Binary, function(compressor) {
+        return this.left.has_side_effects(compressor)
+            || this.right.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_Assign, return_true);
+    def_has_side_effects(AST_Conditional, function(compressor) {
+        return this.condition.has_side_effects(compressor)
+            || this.consequent.has_side_effects(compressor)
+            || this.alternative.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_Unary, function(compressor) {
+        return unary_side_effects.has(this.operator)
+            || this.expression.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_SymbolRef, function(compressor) {
+        return !this.is_declared(compressor) && !pure_prop_access_globals.has(this.name);
+    });
+    def_has_side_effects(AST_SymbolClassProperty, return_false);
+    def_has_side_effects(AST_SymbolDeclaration, return_false);
+    def_has_side_effects(AST_Object, function(compressor) {
+        return any(this.properties, compressor);
+    });
+    def_has_side_effects(AST_ObjectKeyVal, function(compressor) {
+        return (
+            this.computed_key() && this.key.has_side_effects(compressor)
+            || this.value && this.value.has_side_effects(compressor)
+        );
+    });
+    def_has_side_effects([
+        AST_ClassProperty,
+        AST_ClassPrivateProperty,
+    ], function(compressor) {
+        return (
+            this.computed_key() && this.key.has_side_effects(compressor)
+            || this.static && this.value && this.value.has_side_effects(compressor)
+        );
+    });
+    def_has_side_effects([
+        AST_PrivateMethod,
+        AST_PrivateGetter,
+        AST_PrivateSetter,
+        AST_ConciseMethod,
+        AST_ObjectGetter,
+        AST_ObjectSetter,
+    ], function(compressor) {
+        return this.computed_key() && this.key.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_Array, function(compressor) {
+        return any(this.elements, compressor);
+    });
+    def_has_side_effects(AST_Dot, function(compressor) {
+        if (is_nullish(this, compressor)) {
+            return this.expression.has_side_effects(compressor);
+        }
+        if (!this.optional && this.expression.may_throw_on_access(compressor)) {
+            return true;
+        }
+
+        return this.expression.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_Sub, function(compressor) {
+        if (is_nullish(this, compressor)) {
+            return this.expression.has_side_effects(compressor);
+        }
+        if (!this.optional && this.expression.may_throw_on_access(compressor)) {
+            return true;
+        }
+
+        var property = this.property.has_side_effects(compressor);
+        if (property && this.optional) return true; // "?." is a condition
+
+        return property || this.expression.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_Chain, function (compressor) {
+        return this.expression.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_Sequence, function(compressor) {
+        return any(this.expressions, compressor);
+    });
+    def_has_side_effects(AST_Definitions, function(compressor) {
+        return any(this.definitions, compressor);
+    });
+    def_has_side_effects(AST_VarDef, function() {
+        return this.value != null;
+    });
+    def_has_side_effects(AST_TemplateSegment, return_false);
+    def_has_side_effects(AST_TemplateString, function(compressor) {
+        return any(this.segments, compressor);
+    });
+})(function(node_or_nodes, func) {
+    for (const node of [].concat(node_or_nodes)) {
+        node.DEFMETHOD("has_side_effects", func);
+    }
+});
+
+// determine if expression may throw
+(function(def_may_throw) {
+    def_may_throw(AST_Node, return_true);
+
+    def_may_throw(AST_Constant, return_false);
+    def_may_throw(AST_EmptyStatement, return_false);
+    def_may_throw(AST_Lambda, return_false);
+    def_may_throw(AST_SymbolDeclaration, return_false);
+    def_may_throw(AST_This, return_false);
+    def_may_throw(AST_ImportMeta, return_false);
+
+    function any(list, compressor) {
+        for (var i = list.length; --i >= 0;)
+            if (list[i].may_throw(compressor))
+                return true;
+        return false;
+    }
+
+    def_may_throw(AST_Class, function(compressor) {
+        if (this.extends && this.extends.may_throw(compressor)) return true;
+        return any(this.properties, compressor);
+    });
+    def_may_throw(AST_ClassStaticBlock, function (compressor) {
+        return any(this.body, compressor);
+    });
+
+    def_may_throw(AST_Array, function(compressor) {
+        return any(this.elements, compressor);
+    });
+    def_may_throw(AST_Assign, function(compressor) {
+        if (this.right.may_throw(compressor)) return true;
+        if (!compressor.has_directive("use strict")
+            && this.operator == "="
+            && this.left instanceof AST_SymbolRef) {
+            return false;
+        }
+        return this.left.may_throw(compressor);
+    });
+    def_may_throw(AST_Binary, function(compressor) {
+        return this.left.may_throw(compressor)
+            || this.right.may_throw(compressor);
+    });
+    def_may_throw(AST_Block, function(compressor) {
+        return any(this.body, compressor);
+    });
+    def_may_throw(AST_Call, function(compressor) {
+        if (is_nullish(this, compressor)) return false;
+        if (any(this.args, compressor)) return true;
+        if (this.is_callee_pure(compressor)) return false;
+        if (this.expression.may_throw(compressor)) return true;
+        return !(this.expression instanceof AST_Lambda)
+            || any(this.expression.body, compressor);
+    });
+    def_may_throw(AST_Case, function(compressor) {
+        return this.expression.may_throw(compressor)
+            || any(this.body, compressor);
+    });
+    def_may_throw(AST_Conditional, function(compressor) {
+        return this.condition.may_throw(compressor)
+            || this.consequent.may_throw(compressor)
+            || this.alternative.may_throw(compressor);
+    });
+    def_may_throw(AST_Definitions, function(compressor) {
+        return any(this.definitions, compressor);
+    });
+    def_may_throw(AST_If, function(compressor) {
+        return this.condition.may_throw(compressor)
+            || this.body && this.body.may_throw(compressor)
+            || this.alternative && this.alternative.may_throw(compressor);
+    });
+    def_may_throw(AST_LabeledStatement, function(compressor) {
+        return this.body.may_throw(compressor);
+    });
+    def_may_throw(AST_Object, function(compressor) {
+        return any(this.properties, compressor);
+    });
+    def_may_throw(AST_ObjectKeyVal, function(compressor) {
+        return (
+            this.computed_key() && this.key.may_throw(compressor)
+            || this.value ? this.value.may_throw(compressor) : false
+        );
+    });
+    def_may_throw([
+        AST_ClassProperty,
+        AST_ClassPrivateProperty,
+    ], function(compressor) {
+        return (
+            this.computed_key() && this.key.may_throw(compressor)
+            || this.static && this.value && this.value.may_throw(compressor)
+        );
+    });
+    def_may_throw([
+        AST_ConciseMethod,
+        AST_ObjectGetter,
+        AST_ObjectSetter,
+    ], function(compressor) {
+        return this.computed_key() && this.key.may_throw(compressor);
+    });
+    def_may_throw([
+        AST_PrivateMethod,
+        AST_PrivateGetter,
+        AST_PrivateSetter,
+    ], return_false);
+    def_may_throw(AST_Return, function(compressor) {
+        return this.value && this.value.may_throw(compressor);
+    });
+    def_may_throw(AST_Sequence, function(compressor) {
+        return any(this.expressions, compressor);
+    });
+    def_may_throw(AST_SimpleStatement, function(compressor) {
+        return this.body.may_throw(compressor);
+    });
+    def_may_throw(AST_Dot, function(compressor) {
+        if (is_nullish(this, compressor)) return false;
+        return !this.optional && this.expression.may_throw_on_access(compressor)
+            || this.expression.may_throw(compressor);
+    });
+    def_may_throw(AST_Sub, function(compressor) {
+        if (is_nullish(this, compressor)) return false;
+        return !this.optional && this.expression.may_throw_on_access(compressor)
+            || this.expression.may_throw(compressor)
+            || this.property.may_throw(compressor);
+    });
+    def_may_throw(AST_Chain, function(compressor) {
+        return this.expression.may_throw(compressor);
+    });
+    def_may_throw(AST_Switch, function(compressor) {
+        return this.expression.may_throw(compressor)
+            || any(this.body, compressor);
+    });
+    def_may_throw(AST_SymbolRef, function(compressor) {
+        return !this.is_declared(compressor) && !pure_prop_access_globals.has(this.name);
+    });
+    def_may_throw(AST_SymbolClassProperty, return_false);
+    def_may_throw(AST_Try, function(compressor) {
+        return this.bcatch ? this.bcatch.may_throw(compressor) : this.body.may_throw(compressor)
+            || this.bfinally && this.bfinally.may_throw(compressor);
+    });
+    def_may_throw(AST_Unary, function(compressor) {
+        if (this.operator == "typeof" && this.expression instanceof AST_SymbolRef)
+            return false;
+        return this.expression.may_throw(compressor);
+    });
+    def_may_throw(AST_VarDef, function(compressor) {
+        if (!this.value) return false;
+        return this.value.may_throw(compressor);
+    });
+})(function(node_or_nodes, func) {
+    for (const node of [].concat(node_or_nodes)) {
+        node.DEFMETHOD("may_throw", func);
+    }
+});
+
+// determine if expression is constant
+(function(def_is_constant_expression) {
+    function all_refs_local(scope) {
+        let result = true;
+        walk(this, node => {
+            if (node instanceof AST_SymbolRef) {
+                if (has_flag(this, INLINED)) {
+                    result = false;
+                    return walk_abort;
+                }
+                var def = node.definition();
+                if (
+                    member(def, this.enclosed)
+                    && !this.variables.has(def.name)
+                ) {
+                    if (scope) {
+                        var scope_def = scope.find_variable(node);
+                        if (def.undeclared ? !scope_def : scope_def === def) {
+                            result = "f";
+                            return true;
+                        }
+                    }
+                    result = false;
+                    return walk_abort;
+                }
+                return true;
+            }
+            if (node instanceof AST_This && this instanceof AST_Arrow) {
+                result = false;
+                return walk_abort;
+            }
+        });
+        return result;
+    }
+
+    def_is_constant_expression(AST_Node, return_false);
+    def_is_constant_expression(AST_Constant, return_true);
+    def_is_constant_expression(AST_Class, function(scope) {
+        if (this.extends && !this.extends.is_constant_expression(scope)) {
+            return false;
+        }
+
+        for (const prop of this.properties) {
+            if (prop.computed_key() && !prop.key.is_constant_expression(scope)) {
+                return false;
+            }
+            if (prop.static && prop.value && !prop.value.is_constant_expression(scope)) {
+                return false;
+            }
+            if (prop instanceof AST_ClassStaticBlock) {
+                return false;
+            }
+        }
+
+        return all_refs_local.call(this, scope);
+    });
+    def_is_constant_expression(AST_Lambda, all_refs_local);
+    def_is_constant_expression(AST_Unary, function() {
+        return this.expression.is_constant_expression();
+    });
+    def_is_constant_expression(AST_Binary, function() {
+        return this.left.is_constant_expression()
+            && this.right.is_constant_expression();
+    });
+    def_is_constant_expression(AST_Array, function() {
+        return this.elements.every((l) => l.is_constant_expression());
+    });
+    def_is_constant_expression(AST_Object, function() {
+        return this.properties.every((l) => l.is_constant_expression());
+    });
+    def_is_constant_expression(AST_ObjectProperty, function() {
+        return !!(!(this.key instanceof AST_Node) && this.value && this.value.is_constant_expression());
+    });
+})(function(node, func) {
+    node.DEFMETHOD("is_constant_expression", func);
+});
+
+
+// may_throw_on_access()
+// returns true if this node may be null, undefined or contain `AST_Accessor`
+(function(def_may_throw_on_access) {
+    AST_Node.DEFMETHOD("may_throw_on_access", function(compressor) {
+        return !compressor.option("pure_getters")
+            || this._dot_throw(compressor);
+    });
+
+    function is_strict(compressor) {
+        return /strict/.test(compressor.option("pure_getters"));
+    }
+
+    def_may_throw_on_access(AST_Node, is_strict);
+    def_may_throw_on_access(AST_Null, return_true);
+    def_may_throw_on_access(AST_Undefined, return_true);
+    def_may_throw_on_access(AST_Constant, return_false);
+    def_may_throw_on_access(AST_Array, return_false);
+    def_may_throw_on_access(AST_Object, function(compressor) {
+        if (!is_strict(compressor)) return false;
+        for (var i = this.properties.length; --i >=0;)
+            if (this.properties[i]._dot_throw(compressor)) return true;
+        return false;
+    });
+    // Do not be as strict with classes as we are with objects.
+    // Hopefully the community is not going to abuse static getters and setters.
+    // https://github.com/terser/terser/issues/724#issuecomment-643655656
+    def_may_throw_on_access(AST_Class, return_false);
+    def_may_throw_on_access(AST_ObjectProperty, return_false);
+    def_may_throw_on_access(AST_ObjectGetter, return_true);
+    def_may_throw_on_access(AST_Expansion, function(compressor) {
+        return this.expression._dot_throw(compressor);
+    });
+    def_may_throw_on_access(AST_Function, return_false);
+    def_may_throw_on_access(AST_Arrow, return_false);
+    def_may_throw_on_access(AST_UnaryPostfix, return_false);
+    def_may_throw_on_access(AST_UnaryPrefix, function() {
+        return this.operator == "void";
+    });
+    def_may_throw_on_access(AST_Binary, function(compressor) {
+        return (this.operator == "&&" || this.operator == "||" || this.operator == "??")
+            && (this.left._dot_throw(compressor) || this.right._dot_throw(compressor));
+    });
+    def_may_throw_on_access(AST_Assign, function(compressor) {
+        if (this.logical) return true;
+
+        return this.operator == "="
+            && this.right._dot_throw(compressor);
+    });
+    def_may_throw_on_access(AST_Conditional, function(compressor) {
+        return this.consequent._dot_throw(compressor)
+            || this.alternative._dot_throw(compressor);
+    });
+    def_may_throw_on_access(AST_Dot, function(compressor) {
+        if (!is_strict(compressor)) return false;
+
+        if (this.property == "prototype") {
+            return !(
+                this.expression instanceof AST_Function
+                || this.expression instanceof AST_Class
+            );
+        }
+        return true;
+    });
+    def_may_throw_on_access(AST_Chain, function(compressor) {
+        return this.expression._dot_throw(compressor);
+    });
+    def_may_throw_on_access(AST_Sequence, function(compressor) {
+        return this.tail_node()._dot_throw(compressor);
+    });
+    def_may_throw_on_access(AST_SymbolRef, function(compressor) {
+        if (this.name === "arguments" && this.scope instanceof AST_Lambda) return false;
+        if (has_flag(this, UNDEFINED)) return true;
+        if (!is_strict(compressor)) return false;
+        if (is_undeclared_ref(this) && this.is_declared(compressor)) return false;
+        if (this.is_immutable()) return false;
+        var fixed = this.fixed_value();
+        return !fixed || fixed._dot_throw(compressor);
+    });
+})(function(node, func) {
+    node.DEFMETHOD("_dot_throw", func);
+});
+
+function is_lhs(node, parent) {
+    if (parent instanceof AST_Unary && unary_side_effects.has(parent.operator)) return parent.expression;
+    if (parent instanceof AST_Assign && parent.left === node) return node;
+    if (parent instanceof AST_ForIn && parent.init === node) return node;
+}
+
+// method to negate an expression
+(function(def_negate) {
+    function basic_negation(exp) {
+        return make_node(AST_UnaryPrefix, exp, {
+            operator: "!",
+            expression: exp
+        });
+    }
+    function best(orig, alt, first_in_statement) {
+        var negated = basic_negation(orig);
+        if (first_in_statement) {
+            var stat = make_node(AST_SimpleStatement, alt, {
+                body: alt
+            });
+            return best_of_expression(negated, stat) === stat ? alt : negated;
+        }
+        return best_of_expression(negated, alt);
+    }
+    def_negate(AST_Node, function() {
+        return basic_negation(this);
+    });
+    def_negate(AST_Statement, function() {
+        throw new Error("Cannot negate a statement");
+    });
+    def_negate(AST_Function, function() {
+        return basic_negation(this);
+    });
+    def_negate(AST_Class, function() {
+        return basic_negation(this);
+    });
+    def_negate(AST_Arrow, function() {
+        return basic_negation(this);
+    });
+    def_negate(AST_UnaryPrefix, function() {
+        if (this.operator == "!")
+            return this.expression;
+        return basic_negation(this);
+    });
+    def_negate(AST_Sequence, function(compressor) {
+        var expressions = this.expressions.slice();
+        expressions.push(expressions.pop().negate(compressor));
+        return make_sequence(this, expressions);
+    });
+    def_negate(AST_Conditional, function(compressor, first_in_statement) {
+        var self = this.clone();
+        self.consequent = self.consequent.negate(compressor);
+        self.alternative = self.alternative.negate(compressor);
+        return best(this, self, first_in_statement);
+    });
+    def_negate(AST_Binary, function(compressor, first_in_statement) {
+        var self = this.clone(), op = this.operator;
+        if (compressor.option("unsafe_comps")) {
+            switch (op) {
+              case "<=" : self.operator = ">"  ; return self;
+              case "<"  : self.operator = ">=" ; return self;
+              case ">=" : self.operator = "<"  ; return self;
+              case ">"  : self.operator = "<=" ; return self;
+            }
+        }
+        switch (op) {
+          case "==" : self.operator = "!="; return self;
+          case "!=" : self.operator = "=="; return self;
+          case "===": self.operator = "!=="; return self;
+          case "!==": self.operator = "==="; return self;
+          case "&&":
+            self.operator = "||";
+            self.left = self.left.negate(compressor, first_in_statement);
+            self.right = self.right.negate(compressor);
+            return best(this, self, first_in_statement);
+          case "||":
+            self.operator = "&&";
+            self.left = self.left.negate(compressor, first_in_statement);
+            self.right = self.right.negate(compressor);
+            return best(this, self, first_in_statement);
+        }
+        return basic_negation(this);
+    });
+})(function(node, func) {
+    node.DEFMETHOD("negate", function(compressor, first_in_statement) {
+        return func.call(this, compressor, first_in_statement);
+    });
+});
+
+(function (def_bitwise_negate) {
+    function basic_bitwise_negation(exp) {
+        return make_node(AST_UnaryPrefix, exp, {
+            operator: "~",
+            expression: exp
+        });
+    }
+
+    def_bitwise_negate(AST_Node, function(_compressor) {
+        return basic_bitwise_negation(this);
+    });
+
+    def_bitwise_negate(AST_Number, function(_compressor) {
+        const neg = ~this.value;
+        if (neg.toString().length > this.value.toString().length) {
+            return basic_bitwise_negation(this);
+        }
+        return make_node(AST_Number, this, { value: neg });
+    });
+
+    def_bitwise_negate(AST_UnaryPrefix, function(compressor, in_32_bit_context) {
+        if (
+            this.operator == "~"
+            && (
+                this.expression.is_32_bit_integer(compressor) ||
+                (in_32_bit_context != null ? in_32_bit_context : compressor.in_32_bit_context())
+            )
+        ) {
+            return this.expression;
+        } else {
+            return basic_bitwise_negation(this);
+        }
+    });
+})(function (node, func) {
+    node.DEFMETHOD("bitwise_negate", func);
+});
+
+// Is the callee of this function pure?
+var global_pure_fns = makePredicate("Boolean decodeURI decodeURIComponent Date encodeURI encodeURIComponent Error escape EvalError isFinite isNaN Number Object parseFloat parseInt RangeError ReferenceError String SyntaxError TypeError unescape URIError");
+AST_Call.DEFMETHOD("is_callee_pure", function(compressor) {
+    if (compressor.option("unsafe")) {
+        var expr = this.expression;
+        var first_arg;
+        if (
+            expr.expression && expr.expression.name === "hasOwnProperty" &&
+            (
+                (first_arg = (this.args && this.args[0] && this.args[0].evaluate(compressor))) == null
+                || first_arg.thedef && first_arg.thedef.undeclared
+            )
+        ) {
+            return false;
+        }
+        if (is_undeclared_ref(expr) && global_pure_fns.has(expr.name)) return true;
+        if (is_pure_builtin_call(compressor, this)) return true;
+    } else if (compressor.option("builtins_pure")) {
+        if (is_pure_builtin_call(compressor, this)) return true;
+    }
+    if ((this instanceof AST_New) && compressor.option("pure_new")) {
+        return true;
+    }
+    if (compressor.option("side_effects") && has_annotation(this, _PURE)) {
+        return true;
+    }
+    return !compressor.pure_funcs(this);
+});
+
+// If I call this, is it a pure function?
+AST_Node.DEFMETHOD("is_call_pure", return_false);
+AST_Dot.DEFMETHOD("is_call_pure", function(compressor) {
+    if (!compressor.option("unsafe")) return;
+    const expr = this.expression;
+
+    let native_obj;
+    if (expr instanceof AST_Array) {
+        native_obj = "Array";
+    } else if (expr.is_boolean()) {
+        native_obj = "Boolean";
+    } else if (expr.is_number(compressor)) {
+        native_obj = "Number";
+    } else if (expr instanceof AST_RegExp) {
+        native_obj = "RegExp";
+    } else if (expr.is_string(compressor)) {
+        native_obj = "String";
+    } else if (!this.may_throw_on_access(compressor)) {
+        native_obj = "Object";
+    }
+    return native_obj != null && compressor.is_pure_native_method(native_obj, this.property);
+});
+
+// tell me if a statement aborts
+const aborts = (thing) => thing && thing.aborts();
+
+(function(def_aborts) {
+    def_aborts(AST_Statement, return_null);
+    def_aborts(AST_Jump, return_this);
+    function block_aborts() {
+        for (var i = 0; i < this.body.length; i++) {
+            if (aborts(this.body[i])) {
+                return this.body[i];
+            }
+        }
+        return null;
+    }
+    def_aborts(AST_Import, return_null);
+    def_aborts(AST_BlockStatement, block_aborts);
+    def_aborts(AST_SwitchBranch, block_aborts);
+    def_aborts(AST_DefClass, function () {
+        for (const prop of this.properties) {
+            if (prop instanceof AST_ClassStaticBlock) {
+                if (prop.aborts()) return prop;
+            }
+        }
+        return null;
+    });
+    def_aborts(AST_ClassStaticBlock, block_aborts);
+    def_aborts(AST_If, function() {
+        return this.alternative && aborts(this.body) && aborts(this.alternative) && this;
+    });
+})(function(node, func) {
+    node.DEFMETHOD("aborts", func);
+});
+
+AST_Node.DEFMETHOD("contains_this", function() {
+    return walk(this, node => {
+        if (node instanceof AST_This) return walk_abort;
+        if (
+            node !== this
+            && node instanceof AST_Scope
+            && !(node instanceof AST_Arrow)
+        ) {
+            return true;
+        }
+    });
+});
+
+function is_modified(compressor, tw, node, value, level, immutable) {
+    var parent = tw.parent(level);
+    var lhs = is_lhs(node, parent);
+    if (lhs) return lhs;
+    if (!immutable
+        && parent instanceof AST_Call
+        && parent.expression === node
+        && !(value instanceof AST_Arrow)
+        && !(value instanceof AST_Class)
+        && !parent.is_callee_pure(compressor)
+        && (!(value instanceof AST_Function)
+            || !(parent instanceof AST_New) && value.contains_this())) {
+        return true;
+    }
+    if (parent instanceof AST_Array) {
+        return is_modified(compressor, tw, parent, parent, level + 1);
+    }
+    if (parent instanceof AST_ObjectKeyVal && node === parent.value) {
+        var obj = tw.parent(level + 1);
+        return is_modified(compressor, tw, obj, obj, level + 2);
+    }
+    if (parent instanceof AST_PropAccess && parent.expression === node) {
+        var prop = read_property(value, parent.property);
+        return !immutable && is_modified(compressor, tw, parent, prop, level + 1);
+    }
+}
+
+/**
+ * Check if a node may be used by the expression it's in
+ * void (0, 1, {node}, 2) -> false
+ * console.log(0, {node}) -> true
+ */
+function is_used_in_expression(tw) {
+    for (let p = -1, node, parent; node = tw.parent(p), parent = tw.parent(p + 1); p++) {
+        if (parent instanceof AST_Sequence) {
+            const nth_expression = parent.expressions.indexOf(node);
+            if (nth_expression !== parent.expressions.length - 1) {
+                // Detect (0, x.noThis)() constructs
+                const grandparent = tw.parent(p + 2);
+                if (
+                    parent.expressions.length > 2
+                    || parent.expressions.length === 1
+                    || !requires_sequence_to_maintain_binding(grandparent, parent, parent.expressions[1])
+                ) {
+                    return false;
+                }
+                return true;
+            } else {
+                continue;
+            }
+        }
+        if (parent instanceof AST_Unary) {
+            const op = parent.operator;
+            if (op === "void") {
+                return false;
+            }
+            if (op === "typeof" || op === "+" || op === "-" || op === "!" || op === "~") {
+                continue;
+            }
+        }
+        if (
+            parent instanceof AST_SimpleStatement
+            || parent instanceof AST_LabeledStatement
+        ) {
+            return false;
+        }
+        if (parent instanceof AST_Scope) {
+            return false;
+        }
+        return true;
+    }
+
+    return true;
+}
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+// methods to evaluate a constant expression
+
+function def_eval(node, func) {
+    node.DEFMETHOD("_eval", func);
+}
+
+// Used to propagate a nullish short-circuit signal upwards through the chain.
+const nullish = Symbol("This AST_Chain is nullish");
+
+// If the node has been successfully reduced to a constant,
+// then its value is returned; otherwise the element itself
+// is returned.
+// They can be distinguished as constant value is never a
+// descendant of AST_Node.
+AST_Node.DEFMETHOD("evaluate", function (compressor) {
+    if (!compressor.option("evaluate"))
+        return this;
+    var val = this._eval(compressor, 1);
+    if (!val || val instanceof RegExp)
+        return val;
+    if (typeof val == "function" || typeof val == "object" || val == nullish)
+        return this;
+
+    // Evaluated strings can be larger than the original expression
+    if (typeof val === "string") {
+        const unevaluated_size = this.size(compressor);
+        if (val.length + 2 > unevaluated_size) return this;
+    }
+
+    return val;
+});
+
+var unaryPrefix = makePredicate("! ~ - + void");
+AST_Node.DEFMETHOD("is_constant", function () {
+    // Accomodate when compress option evaluate=false
+    // as well as the common constant expressions !0 and -1
+    if (this instanceof AST_Constant) {
+        return !(this instanceof AST_RegExp);
+    } else {
+        return this instanceof AST_UnaryPrefix
+            && unaryPrefix.has(this.operator)
+            && (
+                // `this.expression` may be an `AST_RegExp`,
+                // so not only `.is_constant()`.
+                this.expression instanceof AST_Constant
+                || this.expression.is_constant()
+            );
+    }
+});
+
+def_eval(AST_Statement, function () {
+    throw new Error(string_template("Cannot evaluate a statement [{file}:{line},{col}]", this.start));
+});
+
+def_eval(AST_Lambda, return_this);
+def_eval(AST_Class, return_this);
+def_eval(AST_Node, return_this);
+def_eval(AST_Constant, function () {
+    return this.getValue();
+});
+
+const supports_bigint = typeof BigInt === "function";
+def_eval(AST_BigInt, function () {
+    if (supports_bigint) {
+        return BigInt(this.value);
+    } else {
+        return this;
+    }
+});
+
+def_eval(AST_RegExp, function (compressor) {
+    let evaluated = compressor.evaluated_regexps.get(this.value);
+    if (evaluated === undefined && regexp_is_safe(this.value.source)) {
+        try {
+            const { source, flags } = this.value;
+            evaluated = new RegExp(source, flags);
+        } catch (e) {
+            evaluated = null;
+        }
+        compressor.evaluated_regexps.set(this.value, evaluated);
+    }
+    return evaluated || this;
+});
+
+def_eval(AST_TemplateString, function () {
+    if (this.segments.length !== 1) return this;
+    return this.segments[0].value;
+});
+
+def_eval(AST_Function, function (compressor) {
+    if (compressor.option("unsafe")) {
+        var fn = function () { };
+        fn.node = this;
+        fn.toString = () => this.print_to_string();
+        return fn;
+    }
+    return this;
+});
+
+def_eval(AST_Array, function (compressor, depth) {
+    if (compressor.option("unsafe")) {
+        var elements = [];
+        for (var i = 0, len = this.elements.length; i < len; i++) {
+            var element = this.elements[i];
+            var value = element._eval(compressor, depth);
+            if (element === value)
+                return this;
+            elements.push(value);
+        }
+        return elements;
+    }
+    return this;
+});
+
+def_eval(AST_Object, function (compressor, depth) {
+    if (compressor.option("unsafe")) {
+        var val = {};
+        for (var i = 0, len = this.properties.length; i < len; i++) {
+            var prop = this.properties[i];
+            if (prop instanceof AST_Expansion)
+                return this;
+            var key = prop.key;
+            if (key instanceof AST_Symbol) {
+                key = key.name;
+            } else if (key instanceof AST_Node) {
+                key = key._eval(compressor, depth);
+                if (key === prop.key)
+                    return this;
+            }
+            if (typeof Object.prototype[key] === "function") {
+                return this;
+            }
+            if (prop.value instanceof AST_Function)
+                continue;
+            val[key] = prop.value._eval(compressor, depth);
+            if (val[key] === prop.value)
+                return this;
+        }
+        return val;
+    }
+    return this;
+});
+
+var non_converting_unary = makePredicate("! typeof void");
+def_eval(AST_UnaryPrefix, function (compressor, depth) {
+    var e = this.expression;
+    if (compressor.option("typeofs")
+        && this.operator == "typeof") {
+        // Function would be evaluated to an array and so typeof would
+        // incorrectly return 'object'. Hence making is a special case.
+        if (e instanceof AST_Lambda
+            || e instanceof AST_SymbolRef
+            && e.fixed_value() instanceof AST_Lambda) {
+            return typeof function () { };
+        }
+        if (
+            (e instanceof AST_Object
+                || e instanceof AST_Array
+                || (e instanceof AST_SymbolRef
+                    && (e.fixed_value() instanceof AST_Object
+                        || e.fixed_value() instanceof AST_Array)))
+            && !e.has_side_effects(compressor)
+        ) {
+            return typeof {};
+        }
+    }
+    if (!non_converting_unary.has(this.operator))
+        depth++;
+    e = e._eval(compressor, depth);
+    if (e === this.expression)
+        return this;
+    switch (this.operator) {
+        case "!": return !e;
+        case "typeof":
+            // typeof <RegExp> returns "object" or "function" on different platforms
+            // so cannot evaluate reliably
+            if (e instanceof RegExp)
+                return this;
+            return typeof e;
+        case "void": return void e;
+        case "~": return ~e;
+        case "-": return -e;
+        case "+": return +e;
+    }
+    return this;
+});
+
+var non_converting_binary = makePredicate("&& || ?? === !==");
+const identity_comparison = makePredicate("== != === !==");
+const has_identity = value => typeof value === "object"
+    || typeof value === "function"
+    || typeof value === "symbol";
+
+def_eval(AST_Binary, function (compressor, depth) {
+    if (!non_converting_binary.has(this.operator))
+        depth++;
+
+    var left = this.left._eval(compressor, depth);
+    if (left === this.left)
+        return this;
+    var right = this.right._eval(compressor, depth);
+    if (right === this.right)
+        return this;
+
+    if (left != null
+        && right != null
+        && identity_comparison.has(this.operator)
+        && has_identity(left)
+        && has_identity(right)
+        && typeof left === typeof right) {
+        // Do not compare by reference
+        return this;
+    }
+
+    // Do not mix BigInt and Number; Don't use `>>>` on BigInt or `/ 0n`
+    if (
+        (typeof left === "bigint") !== (typeof right === "bigint")
+        || typeof left === "bigint"
+            && (this.operator === ">>>"
+                || this.operator === "/" && Number(right) === 0)
+    ) {
+        return this;
+    }
+
+    var result;
+    switch (this.operator) {
+        case "&&": result = left && right; break;
+        case "||": result = left || right; break;
+        case "??": result = left != null ? left : right; break;
+        case "|": result = left | right; break;
+        case "&": result = left & right; break;
+        case "^": result = left ^ right; break;
+        case "+": result = left + right; break;
+        case "*": result = left * right; break;
+        case "**": result = left ** right; break;
+        case "/": result = left / right; break;
+        case "%": result = left % right; break;
+        case "-": result = left - right; break;
+        case "<<": result = left << right; break;
+        case ">>": result = left >> right; break;
+        case ">>>": result = left >>> right; break;
+        case "==": result = left == right; break;
+        case "===": result = left === right; break;
+        case "!=": result = left != right; break;
+        case "!==": result = left !== right; break;
+        case "<": result = left < right; break;
+        case "<=": result = left <= right; break;
+        case ">": result = left > right; break;
+        case ">=": result = left >= right; break;
+        default:
+            return this;
+    }
+    if (typeof result === "number" && isNaN(result) && compressor.find_parent(AST_With)) {
+        // leave original expression as is
+        return this;
+    }
+    return result;
+});
+
+def_eval(AST_Conditional, function (compressor, depth) {
+    var condition = this.condition._eval(compressor, depth);
+    if (condition === this.condition)
+        return this;
+    var node = condition ? this.consequent : this.alternative;
+    var value = node._eval(compressor, depth);
+    return value === node ? this : value;
+});
+
+// Set of AST_SymbolRef which are currently being evaluated.
+// Avoids infinite recursion of ._eval()
+const reentrant_ref_eval = new Set();
+def_eval(AST_SymbolRef, function (compressor, depth) {
+    if (reentrant_ref_eval.has(this))
+        return this;
+
+    var fixed = this.fixed_value();
+    if (!fixed)
+        return this;
+
+    reentrant_ref_eval.add(this);
+    const value = fixed._eval(compressor, depth);
+    reentrant_ref_eval.delete(this);
+
+    if (value === fixed)
+        return this;
+
+    if (value && typeof value == "object") {
+        var escaped = this.definition().escaped;
+        if (escaped && depth > escaped)
+            return this;
+    }
+    return value;
+});
+
+def_eval(AST_Chain, function (compressor, depth) {
+    const evaluated = this.expression._eval(compressor, depth, /*ast_chain=*/true);
+    return evaluated === nullish
+        ? undefined
+        : evaluated === this.expression
+          ? this
+          : evaluated;
+});
+
+const global_objs = { Array, Math, Number, Object, String };
+
+const regexp_flags = new Set([
+    "dotAll",
+    "global",
+    "ignoreCase",
+    "multiline",
+    "sticky",
+    "unicode",
+]);
+
+def_eval(AST_PropAccess, function (compressor, depth, ast_chain) {
+    let obj = (ast_chain || this.property === "length" || compressor.option("unsafe"))
+        && this.expression._eval(compressor, depth + 1, ast_chain);
+
+    if (ast_chain) {
+        if (obj === nullish || (this.optional && obj == null)) return nullish;
+    }
+
+    // `.length` of strings and arrays is always safe
+    if (this.property === "length") {
+        if (typeof obj === "string") {
+            return obj.length;
+        }
+
+        const is_spreadless_array =
+            obj instanceof AST_Array
+            && obj.elements.every(el => !(el instanceof AST_Expansion));
+
+        if (
+            is_spreadless_array
+            && obj.elements.every(el => !el.has_side_effects(compressor))
+        ) {
+            return obj.elements.length;
+        }
+    }
+
+    if (compressor.option("unsafe")) {
+        var key = this.property;
+        if (key instanceof AST_Node) {
+            key = key._eval(compressor, depth);
+            if (key === this.property)
+                return this;
+        }
+
+        var exp = this.expression;
+        if (is_undeclared_ref(exp)) {
+            var aa;
+            var first_arg = exp.name === "hasOwnProperty"
+                && key === "call"
+                && (aa = compressor.parent() && compressor.parent().args)
+                && (aa && aa[0]
+                    && aa[0].evaluate(compressor));
+
+            first_arg = first_arg instanceof AST_Dot ? first_arg.expression : first_arg;
+
+            if (first_arg == null || first_arg.thedef && first_arg.thedef.undeclared) {
+                return this.clone();
+            }
+            if (!compressor.is_pure_native_static_property(exp.name, key))
+                return this;
+            obj = global_objs[exp.name];
+        } else {
+            if (obj instanceof RegExp) {
+                if (key == "source") {
+                    return regexp_source_fix(obj.source);
+                } else if (key == "flags" || regexp_flags.has(key)) {
+                    return obj[key];
+                }
+            }
+            if (!obj || obj === exp || !HOP(obj, key))
+                return this;
+
+            if (typeof obj == "function")
+                switch (key) {
+                    case "name":
+                        return obj.node.name ? obj.node.name.name : "";
+                    case "length":
+                        return obj.node.length_property();
+                    default:
+                        return this;
+                }
+        }
+        return obj[key];
+    }
+    return this;
+});
+
+def_eval(AST_Call, function (compressor, depth, ast_chain) {
+    var exp = this.expression;
+
+    if (ast_chain) {
+        const callee = exp._eval(compressor, depth, ast_chain);
+        if (callee === nullish || (this.optional && callee == null)) return nullish;
+    }
+
+    if (compressor.option("unsafe") && exp instanceof AST_PropAccess) {
+        var key = exp.property;
+        if (key instanceof AST_Node) {
+            key = key._eval(compressor, depth);
+            if (typeof key !== "string" && typeof key !== "number")
+                return this;
+        }
+        var val;
+        var e = exp.expression;
+        if (is_undeclared_ref(e)) {
+            var first_arg = e.name === "hasOwnProperty" &&
+                key === "call" &&
+                (this.args[0] && this.args[0].evaluate(compressor));
+
+            first_arg = first_arg instanceof AST_Dot ? first_arg.expression : first_arg;
+
+            if ((first_arg == null || first_arg.thedef && first_arg.thedef.undeclared)) {
+                return this.clone();
+            }
+            if (!compressor.is_pure_native_static_fn(e.name, key)) return this;
+            val = global_objs[e.name];
+        } else {
+            val = e._eval(compressor, depth + 1, /* don't pass ast_chain (exponential work) */);
+
+            if (val === e || !val)
+                return this;
+            if (!compressor.is_pure_native_method(val.constructor.name, key))
+                return this;
+        }
+        var args = [];
+        for (var i = 0, len = this.args.length; i < len; i++) {
+            var arg = this.args[i];
+            var value = arg._eval(compressor, depth);
+            if (arg === value)
+                return this;
+            if (arg instanceof AST_Lambda)
+                return this;
+            args.push(value);
+        }
+        try {
+            return val[key].apply(val, args);
+        } catch (ex) {
+            // We don't really care
+        }
+    }
+    return this;
+});
+
+// Also a subclass of AST_Call
+def_eval(AST_New, return_this);
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+// AST_Node#drop_side_effect_free() gets called when we don't care about the value,
+// only about side effects. We'll be defining this method for each node type in this module
+//
+// Examples:
+// foo++ -> foo++
+// 1 + func() -> func()
+// 10 -> (nothing)
+// knownPureFunc(foo++) -> foo++
+
+function def_drop_side_effect_free(node_or_nodes, func) {
+    for (const node of [].concat(node_or_nodes)) {
+        node.DEFMETHOD("drop_side_effect_free", func);
+    }
+}
+
+// Drop side-effect-free elements from an array of expressions.
+// Returns an array of expressions with side-effects or null
+// if all elements were dropped. Note: original array may be
+// returned if nothing changed.
+function trim(nodes, compressor, first_in_statement) {
+    var len = nodes.length;
+    if (!len)  return null;
+
+    var ret = [], changed = false;
+    for (var i = 0; i < len; i++) {
+        var node = nodes[i].drop_side_effect_free(compressor, first_in_statement);
+        changed |= node !== nodes[i];
+        if (node) {
+            ret.push(node);
+            first_in_statement = false;
+        }
+    }
+    return changed ? ret.length ? ret : null : nodes;
+}
+
+def_drop_side_effect_free(AST_Node, return_this);
+def_drop_side_effect_free(AST_Constant, return_null);
+def_drop_side_effect_free(AST_This, return_null);
+
+def_drop_side_effect_free(AST_Call, function (compressor, first_in_statement) {
+    if (is_nullish_shortcircuited(this, compressor)) {
+        return this.expression.drop_side_effect_free(compressor, first_in_statement);
+    }
+
+    if (!this.is_callee_pure(compressor)) {
+        if (this.expression.is_call_pure(compressor)) {
+            var exprs = this.args.slice();
+            exprs.unshift(this.expression.expression);
+            exprs = trim(exprs, compressor, first_in_statement);
+            return exprs && make_sequence(this, exprs);
+        }
+        if (is_func_expr(this.expression)
+            && (!this.expression.name || !this.expression.name.definition().references.length)) {
+            var node = this.clone();
+            node.expression.process_expression(false, compressor);
+            return node;
+        }
+        return this;
+    }
+
+    var args = trim(this.args, compressor, first_in_statement);
+    return args && make_sequence(this, args);
+});
+
+def_drop_side_effect_free(AST_DynamicImport, function (compressor, first_in_statement) {
+    if (this.phase !== "source") return this;
+    var args = trim(this.args, compressor, first_in_statement);
+    return args && make_sequence(this, args);
+});
+
+def_drop_side_effect_free(AST_Accessor, return_null);
+
+def_drop_side_effect_free(AST_Function, return_null);
+
+def_drop_side_effect_free(AST_Arrow, return_null);
+
+def_drop_side_effect_free(AST_Class, function (compressor) {
+    const with_effects = [];
+
+    if (this.is_self_referential() && this.has_side_effects(compressor)) {
+        return this;
+    }
+
+    const trimmed_extends = this.extends && this.extends.drop_side_effect_free(compressor);
+    if (trimmed_extends) with_effects.push(trimmed_extends);
+
+    for (const prop of this.properties) {
+        if (prop instanceof AST_ClassStaticBlock) {
+            if (prop.has_side_effects(compressor)) {
+                return this; // Be cautious about these
+            }
+        } else {
+            const trimmed_prop = prop.drop_side_effect_free(compressor);
+            if (trimmed_prop) with_effects.push(trimmed_prop);
+        }
+    }
+
+    if (!with_effects.length)
+        return null;
+
+    const exprs = make_sequence(this, with_effects);
+    if (this instanceof AST_DefClass) {
+        // We want a statement
+        return make_node(AST_SimpleStatement, this, { body: exprs });
+    } else {
+        return exprs;
+    }
+});
+
+def_drop_side_effect_free([
+    AST_ClassProperty,
+    AST_ClassPrivateProperty,
+], function (compressor) {
+    const key = this.computed_key() && this.key.drop_side_effect_free(compressor);
+
+    const value = this.static && this.value
+        && this.value.drop_side_effect_free(compressor);
+
+    if (key && value)
+        return make_sequence(this, [key, value]);
+    return key || value || null;
+});
+
+def_drop_side_effect_free(AST_Binary, function (compressor, first_in_statement) {
+    var right = this.right.drop_side_effect_free(compressor);
+    if (!right)
+        return this.left.drop_side_effect_free(compressor, first_in_statement);
+    if (lazy_op.has(this.operator)) {
+        if (right === this.right)
+            return this;
+        var node = this.clone();
+        node.right = right;
+        return node;
+    } else {
+        var left = this.left.drop_side_effect_free(compressor, first_in_statement);
+        if (!left)
+            return this.right.drop_side_effect_free(compressor, first_in_statement);
+        return make_sequence(this, [left, right]);
+    }
+});
+
+def_drop_side_effect_free(AST_Assign, function (compressor) {
+    if (this.logical)
+        return this;
+
+    var left = this.left;
+    if (left.has_side_effects(compressor)
+        || compressor.has_directive("use strict")
+        && left instanceof AST_PropAccess
+        && left.expression.is_constant()) {
+        return this;
+    }
+    set_flag(this, WRITE_ONLY);
+    while (left instanceof AST_PropAccess) {
+        left = left.expression;
+    }
+    if (left.is_constant_expression(compressor.find_parent(AST_Scope))) {
+        return this.right.drop_side_effect_free(compressor);
+    }
+    return this;
+});
+
+def_drop_side_effect_free(AST_Conditional, function (compressor) {
+    var consequent = this.consequent.drop_side_effect_free(compressor);
+    var alternative = this.alternative.drop_side_effect_free(compressor);
+    if (consequent === this.consequent && alternative === this.alternative)
+        return this;
+    if (!consequent)
+        return alternative ? make_node(AST_Binary, this, {
+            operator: "||",
+            left: this.condition,
+            right: alternative
+        }) : this.condition.drop_side_effect_free(compressor);
+    if (!alternative)
+        return make_node(AST_Binary, this, {
+            operator: "&&",
+            left: this.condition,
+            right: consequent
+        });
+    var node = this.clone();
+    node.consequent = consequent;
+    node.alternative = alternative;
+    return node;
+});
+
+def_drop_side_effect_free(AST_Unary, function (compressor, first_in_statement) {
+    if (unary_side_effects.has(this.operator)) {
+        if (!this.expression.has_side_effects(compressor)) {
+            set_flag(this, WRITE_ONLY);
+        } else {
+            clear_flag(this, WRITE_ONLY);
+        }
+        return this;
+    }
+    if (this.operator == "typeof" && this.expression instanceof AST_SymbolRef)
+        return null;
+    var expression = this.expression.drop_side_effect_free(compressor, first_in_statement);
+    if (first_in_statement && expression && is_iife_call(expression)) {
+        if (expression === this.expression && this.operator == "!")
+            return this;
+        return expression.negate(compressor, first_in_statement);
+    }
+    return expression;
+});
+
+def_drop_side_effect_free(AST_SymbolRef, function (compressor) {
+    const safe_access = this.is_declared(compressor)
+        || pure_prop_access_globals.has(this.name);
+    return safe_access ? null : this;
+});
+
+def_drop_side_effect_free(AST_Object, function (compressor, first_in_statement) {
+    var values = trim(this.properties, compressor, first_in_statement);
+    return values && make_sequence(this, values);
+});
+
+def_drop_side_effect_free(AST_ObjectKeyVal, function (compressor, first_in_statement) {
+    const computed_key = this.key instanceof AST_Node;
+    const key = computed_key && this.key.drop_side_effect_free(compressor, first_in_statement);
+    const value = this.value.drop_side_effect_free(compressor, first_in_statement);
+    if (key && value) {
+        return make_sequence(this, [key, value]);
+    }
+    return key || value;
+});
+
+def_drop_side_effect_free([
+    AST_ConciseMethod,
+    AST_ObjectGetter,
+    AST_ObjectSetter,
+], function (compressor, first_in_statement) {
+    return this.computed_key() ? this.key.drop_side_effect_free(compressor, first_in_statement) : null;
+});
+
+def_drop_side_effect_free([
+    AST_PrivateMethod,
+    AST_PrivateGetter,
+    AST_PrivateSetter,
+], function () {
+    return null;
+});
+
+def_drop_side_effect_free(AST_Array, function (compressor, first_in_statement) {
+    var values = trim(this.elements, compressor, first_in_statement);
+    return values && make_sequence(this, values);
+});
+
+def_drop_side_effect_free(AST_Dot, function (compressor, first_in_statement) {
+    if (is_nullish_shortcircuited(this, compressor)) {
+        return this.expression.drop_side_effect_free(compressor, first_in_statement);
+    }
+    if (!this.optional && this.expression.may_throw_on_access(compressor)) {
+        return this;
+    }
+
+    return this.expression.drop_side_effect_free(compressor, first_in_statement);
+});
+
+def_drop_side_effect_free(AST_Sub, function (compressor, first_in_statement) {
+    if (is_nullish_shortcircuited(this, compressor)) {
+        return this.expression.drop_side_effect_free(compressor, first_in_statement);
+    }
+    if (!this.optional && this.expression.may_throw_on_access(compressor)) {
+        return this;
+    }
+
+    var property = this.property.drop_side_effect_free(compressor);
+    if (property && this.optional) return this;
+
+    var expression = this.expression.drop_side_effect_free(compressor, first_in_statement);
+
+    if (expression && property) return make_sequence(this, [expression, property]);
+    return expression || property;
+});
+
+def_drop_side_effect_free(AST_Chain, function (compressor, first_in_statement) {
+    return this.expression.drop_side_effect_free(compressor, first_in_statement);
+});
+
+def_drop_side_effect_free(AST_Sequence, function (compressor) {
+    var last = this.tail_node();
+    var expr = last.drop_side_effect_free(compressor);
+    if (expr === last)
+        return this;
+    var expressions = this.expressions.slice(0, -1);
+    if (expr)
+        expressions.push(expr);
+    if (!expressions.length) {
+        return make_node(AST_Number, this, { value: 0 });
+    }
+    return make_sequence(this, expressions);
+});
+
+def_drop_side_effect_free(AST_Expansion, function (compressor, first_in_statement) {
+    return this.expression.drop_side_effect_free(compressor, first_in_statement);
+});
+
+def_drop_side_effect_free(AST_TemplateSegment, return_null);
+
+def_drop_side_effect_free(AST_TemplateString, function (compressor) {
+    var values = trim(this.segments, compressor, first_in_statement);
+    return values && make_sequence(this, values);
+});
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+const r_keep_assign = /keep_assign/;
+
+/** Drop unused variables from this scope */
+AST_Scope.DEFMETHOD("drop_unused", function(compressor) {
+    if (!compressor.option("unused")) return;
+    if (compressor.has_directive("use asm")) return;
+    if (!this.variables) return; // not really a scope (eg: AST_Class)
+
+    var self = this;
+    if (self.pinned()) return;
+    var drop_funcs = !(self instanceof AST_Toplevel) || compressor.toplevel.funcs;
+    var drop_vars = !(self instanceof AST_Toplevel) || compressor.toplevel.vars;
+    const assign_as_unused = r_keep_assign.test(compressor.option("unused")) ? return_false : function(node) {
+        if (node instanceof AST_Assign
+            && !node.logical
+            && (has_flag(node, WRITE_ONLY) || node.operator == "=")
+        ) {
+            return node.left;
+        }
+        if (node instanceof AST_Unary && has_flag(node, WRITE_ONLY)) {
+            return node.expression;
+        }
+    };
+    var in_use_ids = new Map();
+    var fixed_ids = new Map();
+    if (self instanceof AST_Toplevel && compressor.top_retain) {
+        self.variables.forEach(function(def) {
+            if (compressor.top_retain(def)) {
+                in_use_ids.set(def.id, def);
+            }
+        });
+    }
+    var var_defs_by_id = new Map();
+    var initializations = new Map();
+
+    // pass 1: find out which symbols are directly used in
+    // this scope (not in nested scopes).
+    var scope = this;
+    var tw = new TreeWalker(function(node, descend) {
+        if (node instanceof AST_Lambda && node.uses_arguments && !tw.has_directive("use strict")) {
+            node.argnames.forEach(function(argname) {
+                if (!(argname instanceof AST_SymbolDeclaration)) return;
+                var def = argname.definition();
+                in_use_ids.set(def.id, def);
+            });
+        }
+        if (node === self) return;
+        if (node instanceof AST_Class && node.has_side_effects(compressor)) {
+            if (node.is_self_referential()) {
+                descend();
+            } else {
+                node.visit_nondeferred_class_parts(tw);
+            }
+        }
+        if (node instanceof AST_Defun || node instanceof AST_DefClass) {
+            var node_def = node.name.definition();
+            const in_export = tw.parent() instanceof AST_Export;
+            if (in_export || !drop_funcs && scope === self) {
+                if (node_def.global) {
+                    in_use_ids.set(node_def.id, node_def);
+                }
+            }
+
+            map_add(initializations, node_def.id, node);
+            return true; // don't go in nested scopes
+        }
+        // In the root scope, we drop things. In inner scopes, we just check for uses.
+        const in_root_scope = scope === self;
+        if (node instanceof AST_SymbolFunarg && in_root_scope) {
+            map_add(var_defs_by_id, node.definition().id, node);
+        }
+        if (node instanceof AST_Definitions && in_root_scope) {
+            const in_export = tw.parent() instanceof AST_Export;
+            node.definitions.forEach(function(def) {
+                if (def.name instanceof AST_SymbolVar) {
+                    map_add(var_defs_by_id, def.name.definition().id, def);
+                }
+                if (in_export || !drop_vars) {
+                    walk(def.name, node => {
+                        if (node instanceof AST_SymbolDeclaration) {
+                            const def = node.definition();
+                            if (def.global) {
+                                in_use_ids.set(def.id, def);
+                            }
+                        }
+                    });
+                }
+                if (def.name instanceof AST_Destructuring) {
+                    def.walk(tw);
+                }
+                if (def.name instanceof AST_SymbolDeclaration && def.value) {
+                    var node_def = def.name.definition();
+                    map_add(initializations, node_def.id, def.value);
+                    if (!node_def.chained && def.name.fixed_value() === def.value) {
+                        fixed_ids.set(node_def.id, def);
+                    }
+                    if (def.value.has_side_effects(compressor)) {
+                        def.value.walk(tw);
+                    }
+                }
+            });
+            return true;
+        }
+        return scan_ref_scoped(node, descend);
+    });
+    self.walk(tw);
+
+    // pass 2: for every used symbol we need to walk its
+    // initialization code to figure out if it uses other
+    // symbols (that may not be in_use).
+    tw = new TreeWalker(scan_ref_scoped);
+    in_use_ids.forEach(function (def) {
+        var init = initializations.get(def.id);
+        if (init) init.forEach(function(init) {
+            init.walk(tw);
+        });
+    });
+
+    // pass 3: we should drop declarations not in_use
+    var tt = new TreeTransformer(
+        function before(node, descend, in_list) {
+            var parent = tt.parent();
+            if (drop_vars) {
+                const sym = assign_as_unused(node);
+                if (sym instanceof AST_SymbolRef) {
+                    var def = sym.definition();
+                    var in_use = in_use_ids.has(def.id);
+                    if (node instanceof AST_Assign) {
+                        if (!in_use || fixed_ids.has(def.id) && fixed_ids.get(def.id) !== node) {
+                            const assignee = node.right.transform(tt);
+                            if (!in_use && !assignee.has_side_effects(compressor) && !is_used_in_expression(tt)) {
+                                return in_list ? MAP.skip : make_node(AST_Number, node, { value: 0 });
+                            }
+                            return maintain_this_binding(parent, node, assignee);
+                        }
+                    } else if (!in_use) {
+                        return in_list ? MAP.skip : make_node(AST_Number, node, { value: 0 });
+                    }
+                }
+            }
+            if (scope !== self) return;
+            var def;
+            if (node.name
+                && (node instanceof AST_ClassExpression
+                    && !keep_name(compressor.option("keep_classnames"), (def = node.name.definition()).name)
+                || node instanceof AST_Function
+                    && !keep_name(compressor.option("keep_fnames"), (def = node.name.definition()).name))) {
+                // any declarations with same name will overshadow
+                // name of this anonymous function and can therefore
+                // never be used anywhere
+                if (!in_use_ids.has(def.id) || def.orig.length > 1) node.name = null;
+            }
+            if (node instanceof AST_Lambda && !(node instanceof AST_Accessor)) {
+                var trim =
+                    !compressor.option("keep_fargs")
+                    // Is this an IIFE that won't refer to its name?
+                    || parent instanceof AST_Call
+                        && parent.expression === node
+                        && !node.pinned()
+                        && (!node.name || node.name.unreferenced());
+                for (var a = node.argnames, i = a.length; --i >= 0;) {
+                    var sym = a[i];
+                    if (sym instanceof AST_Expansion) {
+                        sym = sym.expression;
+                    }
+                    if (sym instanceof AST_DefaultAssign) {
+                        sym = sym.left;
+                    }
+                    // Do not drop destructuring arguments.
+                    // They constitute a type assertion of sorts
+                    if (
+                        !(sym instanceof AST_Destructuring)
+                        && !in_use_ids.has(sym.definition().id)
+                    ) {
+                        set_flag(sym, UNUSED);
+                        if (trim) {
+                            a.pop();
+                        }
+                    } else {
+                        trim = false;
+                    }
+                }
+            }
+            if (node instanceof AST_DefClass && node !== self) {
+                const def = node.name.definition();
+                descend(node, this);
+                const keep_class = def.global && !drop_funcs || in_use_ids.has(def.id);
+                if (!keep_class) {
+                    const kept = node.drop_side_effect_free(compressor);
+                    if (kept == null) {
+                        def.eliminated++;
+                        return in_list ? MAP.skip : make_node(AST_EmptyStatement, node);
+                    }
+                    return kept;
+                }
+                return node;
+            }
+            if (node instanceof AST_Defun && node !== self) {
+                const def = node.name.definition();
+                const keep = def.global && !drop_funcs || in_use_ids.has(def.id);
+                if (!keep) {
+                    def.eliminated++;
+                    return in_list ? MAP.skip : make_node(AST_EmptyStatement, node);
+                }
+            }
+            if (node instanceof AST_Definitions && !(parent instanceof AST_ForIn && parent.init === node)) {
+                var drop_block = !(parent instanceof AST_Toplevel) && !(node instanceof AST_Var);
+                // place uninitialized names at the start
+                var body = [], head = [], tail = [];
+                // for unused names whose initialization has
+                // side effects, we can cascade the init. code
+                // into the next one, or next statement.
+                var side_effects = [];
+                node.definitions.forEach(function(def) {
+                    if (def.value) def.value = def.value.transform(tt);
+                    var is_destructure = def.name instanceof AST_Destructuring;
+                    var sym = is_destructure
+                        ? new SymbolDef(null, { name: "<destructure>" }) /* fake SymbolDef */
+                        : def.name.definition();
+                    if (drop_block && sym.global) return tail.push(def);
+                    if (!(drop_vars || drop_block)
+                        || is_destructure
+                            && (def.name.names.length
+                                || def.name.is_array
+                                || compressor.option("pure_getters") != true)
+                        || in_use_ids.has(sym.id)
+                    ) {
+                        if (def.value && fixed_ids.has(sym.id) && fixed_ids.get(sym.id) !== def) {
+                            def.value = def.value.drop_side_effect_free(compressor);
+                        }
+                        if (def.name instanceof AST_SymbolVar) {
+                            var var_defs = var_defs_by_id.get(sym.id);
+                            if (var_defs.length > 1 && (!def.value || sym.orig.indexOf(def.name) > sym.eliminated)) {
+                                if (def.value) {
+                                    var ref = make_node(AST_SymbolRef, def.name, def.name);
+                                    sym.references.push(ref);
+                                    var assign = make_node(AST_Assign, def, {
+                                        operator: "=",
+                                        logical: false,
+                                        left: ref,
+                                        right: def.value
+                                    });
+                                    if (fixed_ids.get(sym.id) === def) {
+                                        fixed_ids.set(sym.id, assign);
+                                    }
+                                    side_effects.push(assign.transform(tt));
+                                }
+                                remove(var_defs, def);
+                                sym.eliminated++;
+                                return;
+                            }
+                        }
+                        if (def.value) {
+                            if (side_effects.length > 0) {
+                                if (tail.length > 0) {
+                                    side_effects.push(def.value);
+                                    def.value = make_sequence(def.value, side_effects);
+                                } else {
+                                    body.push(make_node(AST_SimpleStatement, node, {
+                                        body: make_sequence(node, side_effects)
+                                    }));
+                                }
+                                side_effects = [];
+                            }
+                            tail.push(def);
+                        } else {
+                            head.push(def);
+                        }
+                    } else if (sym.orig[0] instanceof AST_SymbolCatch) {
+                        var value = def.value && def.value.drop_side_effect_free(compressor);
+                        if (value) side_effects.push(value);
+                        def.value = null;
+                        head.push(def);
+                    } else {
+                        var value = def.value && def.value.drop_side_effect_free(compressor);
+                        if (value) {
+                            side_effects.push(value);
+                        }
+                        sym.eliminated++;
+                    }
+                });
+                if (head.length > 0 || tail.length > 0) {
+                    node.definitions = head.concat(tail);
+                    body.push(node);
+                }
+                if (side_effects.length > 0) {
+                    body.push(make_node(AST_SimpleStatement, node, {
+                        body: make_sequence(node, side_effects)
+                    }));
+                }
+                switch (body.length) {
+                  case 0:
+                    return in_list ? MAP.skip : make_node(AST_EmptyStatement, node);
+                  case 1:
+                    return body[0];
+                  default:
+                    return in_list ? MAP.splice(body) : make_node(AST_BlockStatement, node, { body });
+                }
+            }
+            // certain combination of unused name + side effect leads to:
+            //    https://github.com/mishoo/UglifyJS2/issues/44
+            //    https://github.com/mishoo/UglifyJS2/issues/1830
+            //    https://github.com/mishoo/UglifyJS2/issues/1838
+            // that's an invalid AST.
+            // We fix it at this stage by moving the `var` outside the `for`.
+            if (node instanceof AST_For) {
+                descend(node, this);
+                var block;
+                if (node.init instanceof AST_BlockStatement) {
+                    block = node.init;
+                    node.init = block.body.pop();
+                    block.body.push(node);
+                }
+                if (node.init instanceof AST_SimpleStatement) {
+                    node.init = node.init.body;
+                } else if (is_empty(node.init)) {
+                    node.init = null;
+                }
+                return !block ? node : in_list ? MAP.splice(block.body) : block;
+            }
+            if (node instanceof AST_LabeledStatement
+                && node.body instanceof AST_For
+            ) {
+                descend(node, this);
+                if (node.body instanceof AST_BlockStatement) {
+                    var block = node.body;
+                    node.body = block.body.pop();
+                    block.body.push(node);
+                    return in_list ? MAP.splice(block.body) : block;
+                }
+                return node;
+            }
+            if (node instanceof AST_BlockStatement) {
+                descend(node, this);
+                if (in_list && node.body.every(can_be_evicted_from_block)) {
+                    return MAP.splice(node.body);
+                }
+                return node;
+            }
+            if (node instanceof AST_Scope && !(node instanceof AST_ClassStaticBlock)) {
+                const save_scope = scope;
+                scope = node;
+                descend(node, this);
+                scope = save_scope;
+                return node;
+            }
+        },
+        function after(node, in_list) {
+            if (node instanceof AST_Sequence) {
+                switch (node.expressions.length) {
+                    case 0: return in_list ? MAP.skip : make_node(AST_Number, node, { value: 0 });
+                    case 1: return node.expressions[0];
+                }
+            }
+        }
+    );
+
+    self.transform(tt);
+
+    function scan_ref_scoped(node, descend) {
+        var node_def;
+        const sym = assign_as_unused(node);
+        if (sym instanceof AST_SymbolRef
+            && !is_ref_of(node.left, AST_SymbolBlockDeclaration)
+            && self.variables.get(sym.name) === (node_def = sym.definition())
+        ) {
+            if (node instanceof AST_Assign) {
+                node.right.walk(tw);
+                if (!node_def.chained && node.left.fixed_value() === node.right) {
+                    fixed_ids.set(node_def.id, node);
+                }
+            }
+            return true;
+        }
+        if (node instanceof AST_SymbolRef) {
+            node_def = node.definition();
+            if (!in_use_ids.has(node_def.id)) {
+                in_use_ids.set(node_def.id, node_def);
+                if (node_def.orig[0] instanceof AST_SymbolCatch) {
+                    const redef = node_def.scope.is_block_scope()
+                        && node_def.scope.get_defun_scope().variables.get(node_def.name);
+                    if (redef) in_use_ids.set(redef.id, redef);
+                }
+            }
+            return true;
+        }
+        if (node instanceof AST_Class) {
+            descend();
+            return true;
+        }
+        if (node instanceof AST_Scope && !(node instanceof AST_ClassStaticBlock)) {
+            var save_scope = scope;
+            scope = node;
+            descend();
+            scope = save_scope;
+            return true;
+        }
+    }
+});
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+/**
+ * Define the method AST_Node#reduce_vars, which goes through the AST in
+ * execution order to perform basic flow analysis
+ */
+function def_reduce_vars(node, func) {
+    node.DEFMETHOD("reduce_vars", func);
+}
+
+def_reduce_vars(AST_Node, noop);
+
+/** Clear definition properties */
+function reset_def(compressor, def) {
+    def.assignments = 0;
+    def.chained = false;
+    def.direct_access = false;
+    def.escaped = 0;
+    def.recursive_refs = 0;
+    def.references = [];
+    def.single_use = undefined;
+    if (
+        def.scope.pinned()
+        || (def.orig[0] instanceof AST_SymbolFunarg && def.scope.uses_arguments)
+    ) {
+        def.fixed = false;
+    } else if (def.orig[0] instanceof AST_SymbolConst || !compressor.exposed(def)) {
+        def.fixed = def.init;
+    } else {
+        def.fixed = false;
+    }
+}
+
+function reset_variables(tw, compressor, node) {
+    node.variables.forEach(function(def) {
+        reset_def(compressor, def);
+        if (def.fixed === null) {
+            tw.defs_to_safe_ids.set(def.id, tw.safe_ids);
+            mark(tw, def, true);
+        } else if (def.fixed) {
+            tw.loop_ids.set(def.id, tw.in_loop);
+            mark(tw, def, true);
+        }
+    });
+}
+
+function reset_block_variables(compressor, node) {
+    if (node.block_scope) node.block_scope.variables.forEach((def) => {
+        reset_def(compressor, def);
+    });
+}
+
+function push(tw) {
+    tw.safe_ids = Object.create(tw.safe_ids);
+}
+
+function pop(tw) {
+    tw.safe_ids = Object.getPrototypeOf(tw.safe_ids);
+}
+
+function mark(tw, def, safe) {
+    tw.safe_ids[def.id] = safe;
+}
+
+function safe_to_read(tw, def) {
+    if (def.single_use == "m") return false;
+    if (tw.safe_ids[def.id]) {
+        if (def.fixed == null) {
+            var orig = def.orig[0];
+            if (orig instanceof AST_SymbolFunarg || orig.name == "arguments") return false;
+            def.fixed = make_void_0(orig);
+        }
+        return true;
+    }
+    return def.fixed instanceof AST_Defun;
+}
+
+function safe_to_assign(tw, def, scope, value) {
+    if (def.fixed === undefined) return true;
+    let def_safe_ids;
+    if (def.fixed === null
+        && (def_safe_ids = tw.defs_to_safe_ids.get(def.id))
+    ) {
+        def_safe_ids[def.id] = false;
+        tw.defs_to_safe_ids.delete(def.id);
+        return true;
+    }
+    if (!HOP(tw.safe_ids, def.id)) return false;
+    if (!safe_to_read(tw, def)) return false;
+    if (def.fixed === false) return false;
+    if (def.fixed != null && (!value || def.references.length > def.assignments)) return false;
+    if (def.fixed instanceof AST_Defun) {
+        return value instanceof AST_Node && def.fixed.parent_scope === scope;
+    }
+    return def.orig.every((sym) => {
+        return !(sym instanceof AST_SymbolConst
+            || sym instanceof AST_SymbolDefun
+            || sym instanceof AST_SymbolLambda);
+    });
+}
+
+function ref_once(tw, compressor, def) {
+    return compressor.option("unused")
+        && !def.scope.pinned()
+        && def.references.length - def.recursive_refs == 1
+        && tw.loop_ids.get(def.id) === tw.in_loop;
+}
+
+function is_immutable(value) {
+    if (!value) return false;
+    return value.is_constant()
+        || value instanceof AST_Lambda
+        || value instanceof AST_This;
+}
+
+// A definition "escapes" when its value can leave the point of use.
+// Example: `a = b || c`
+// In this example, "b" and "c" are escaping, because they're going into "a"
+//
+// def.escaped is != 0 when it escapes.
+//
+// When greater than 1, it means that N chained properties will be read off
+// of that def before an escape occurs. This is useful for evaluating
+// property accesses, where you need to know when to stop.
+function mark_escaped(tw, d, scope, node, value, level = 0, depth = 1) {
+    var parent = tw.parent(level);
+    if (value) {
+        if (value.is_constant()) return;
+        if (value instanceof AST_ClassExpression) return;
+    }
+
+    if (
+        parent instanceof AST_Assign && (parent.operator === "=" || parent.logical) && node === parent.right
+        || parent instanceof AST_Call && (node !== parent.expression || parent instanceof AST_New)
+        || parent instanceof AST_Exit && node === parent.value && node.scope !== d.scope
+        || parent instanceof AST_VarDefLike && node === parent.value
+        || parent instanceof AST_Yield && node === parent.value && node.scope !== d.scope
+    ) {
+        if (depth > 1 && !(value && value.is_constant_expression(scope))) depth = 1;
+        if (!d.escaped || d.escaped > depth) d.escaped = depth;
+        return;
+    } else if (
+        parent instanceof AST_Array
+        || parent instanceof AST_Await
+        || parent instanceof AST_Binary && lazy_op.has(parent.operator)
+        || parent instanceof AST_Conditional && node !== parent.condition
+        || parent instanceof AST_Expansion
+        || parent instanceof AST_Sequence && node === parent.tail_node()
+    ) {
+        mark_escaped(tw, d, scope, parent, parent, level + 1, depth);
+    } else if (parent instanceof AST_ObjectKeyVal && node === parent.value) {
+        var obj = tw.parent(level + 1);
+
+        mark_escaped(tw, d, scope, obj, obj, level + 2, depth);
+    } else if (parent instanceof AST_PropAccess && node === parent.expression) {
+        value = read_property(value, parent.property);
+
+        mark_escaped(tw, d, scope, parent, value, level + 1, depth + 1);
+        if (value) return;
+    }
+
+    if (level > 0) return;
+    if (parent instanceof AST_Sequence && node !== parent.tail_node()) return;
+    if (parent instanceof AST_SimpleStatement) return;
+
+    d.direct_access = true;
+}
+
+const suppress = node => walk(node, node => {
+    if (!(node instanceof AST_Symbol)) return;
+    var d = node.definition();
+    if (!d) return;
+    if (node instanceof AST_SymbolRef) d.references.push(node);
+    d.fixed = false;
+});
+
+def_reduce_vars(AST_Accessor, function(tw, descend, compressor) {
+    push(tw);
+    reset_variables(tw, compressor, this);
+    descend();
+    pop(tw);
+    return true;
+});
+
+def_reduce_vars(AST_Assign, function(tw, descend, compressor) {
+    var node = this;
+    if (node.left instanceof AST_Destructuring) {
+        suppress(node.left);
+        return;
+    }
+
+    const finish_walk = () => {
+        if (node.logical) {
+            node.left.walk(tw);
+
+            push(tw);
+            node.right.walk(tw);
+            pop(tw);
+
+            return true;
+        }
+    };
+
+    var sym = node.left;
+    if (!(sym instanceof AST_SymbolRef)) return finish_walk();
+
+    var def = sym.definition();
+    var safe = safe_to_assign(tw, def, sym.scope, node.right);
+    def.assignments++;
+    if (!safe) return finish_walk();
+
+    var fixed = def.fixed;
+    if (!fixed && node.operator != "=" && !node.logical) return finish_walk();
+
+    var eq = node.operator == "=";
+    var value = eq ? node.right : node;
+    if (is_modified(compressor, tw, node, value, 0)) return finish_walk();
+
+    def.references.push(sym);
+
+    if (!node.logical) {
+        if (!eq) def.chained = true;
+
+        def.fixed = eq ? function() {
+            return node.right;
+        } : function() {
+            return make_node(AST_Binary, node, {
+                operator: node.operator.slice(0, -1),
+                left: fixed instanceof AST_Node ? fixed : fixed(),
+                right: node.right
+            });
+        };
+    }
+
+    if (node.logical) {
+        mark(tw, def, false);
+        push(tw);
+        node.right.walk(tw);
+        pop(tw);
+        return true;
+    }
+
+    mark(tw, def, false);
+    node.right.walk(tw);
+    mark(tw, def, true);
+
+    mark_escaped(tw, def, sym.scope, node, value, 0, 1);
+
+    return true;
+});
+
+def_reduce_vars(AST_Binary, function(tw) {
+    if (!lazy_op.has(this.operator)) return;
+    this.left.walk(tw);
+    push(tw);
+    this.right.walk(tw);
+    pop(tw);
+    return true;
+});
+
+def_reduce_vars(AST_Block, function(tw, descend, compressor) {
+    reset_block_variables(compressor, this);
+});
+
+def_reduce_vars(AST_Case, function(tw) {
+    push(tw);
+    this.expression.walk(tw);
+    pop(tw);
+    push(tw);
+    walk_body(this, tw);
+    pop(tw);
+    return true;
+});
+
+def_reduce_vars(AST_Class, function(tw, descend) {
+    clear_flag(this, INLINED);
+    push(tw);
+    descend();
+    pop(tw);
+    return true;
+});
+
+def_reduce_vars(AST_ClassStaticBlock, function(tw, descend, compressor) {
+    reset_block_variables(compressor, this);
+});
+
+def_reduce_vars(AST_Conditional, function(tw) {
+    this.condition.walk(tw);
+    push(tw);
+    this.consequent.walk(tw);
+    pop(tw);
+    push(tw);
+    this.alternative.walk(tw);
+    pop(tw);
+    return true;
+});
+
+def_reduce_vars(AST_Chain, function(tw, descend) {
+    // Chains' conditions apply left-to-right, cumulatively.
+    // If we walk normally we don't go in that order because we would pop before pushing again
+    // Solution: AST_PropAccess and AST_Call push when they are optional, and never pop.
+    // Then we pop everything when they are done being walked.
+    const safe_ids = tw.safe_ids;
+
+    descend();
+
+    // Unroll back to start
+    tw.safe_ids = safe_ids;
+    return true;
+});
+
+def_reduce_vars(AST_Call, function (tw) {
+    this.expression.walk(tw);
+
+    if (this.optional) {
+        // Never pop -- it's popped at AST_Chain above
+        push(tw);
+    }
+
+    for (const arg of this.args) arg.walk(tw);
+
+    return true;
+});
+
+def_reduce_vars(AST_PropAccess, function (tw) {
+    if (!this.optional) return;
+
+    this.expression.walk(tw);
+
+    // Never pop -- it's popped at AST_Chain above
+    push(tw);
+
+    if (this.property instanceof AST_Node) this.property.walk(tw);
+
+    return true;
+});
+
+def_reduce_vars(AST_Default, function(tw, descend) {
+    push(tw);
+    descend();
+    pop(tw);
+    return true;
+});
+
+function mark_lambda(tw, descend, compressor) {
+    clear_flag(this, INLINED);
+    push(tw);
+    reset_variables(tw, compressor, this);
+
+    var iife;
+    if (!this.name
+        && !this.uses_arguments
+        && !this.pinned()
+        && (iife = tw.parent()) instanceof AST_Call
+        && iife.expression === this
+        && !iife.args.some(arg => arg instanceof AST_Expansion)
+        && this.argnames.every(arg_name => arg_name instanceof AST_Symbol)
+    ) {
+        // Virtually turn IIFE parameters into variable definitions:
+        //   (function(a,b) {...})(c,d) => (function() {var a=c,b=d; ...})()
+        // So existing transformation rules can work on them.
+        this.argnames.forEach((arg, i) => {
+            if (!arg.definition) return;
+            var d = arg.definition();
+            // Avoid setting fixed when there's more than one origin for a variable value
+            if (d.orig.length > 1) return;
+            if (d.fixed === undefined && (!this.uses_arguments || tw.has_directive("use strict"))) {
+                d.fixed = function() {
+                    return iife.args[i] || make_void_0(iife);
+                };
+                tw.loop_ids.set(d.id, tw.in_loop);
+                mark(tw, d, true);
+            } else {
+                d.fixed = false;
+            }
+        });
+    }
+
+    descend();
+    pop(tw);
+
+    handle_defined_after_hoist(this);
+
+    return true;
+}
+
+/**
+ * It's possible for a hoisted function to use something that's not defined yet. Example:
+ *
+ * hoisted();
+ * var defined_after = true;
+ * function hoisted() {
+ *   // use defined_after
+ * }
+ *
+ * Or even indirectly:
+ *
+ * B();
+ * var defined_after = true;
+ * function A() {
+ *   // use defined_after
+ * }
+ * function B() {
+ *   A();
+ * }
+ *
+ * Access a variable before declaration will either throw a ReferenceError
+ * (if the variable is declared with `let` or `const`),
+ * or get an `undefined` (if the variable is declared with `var`).
+ *
+ * If the variable is inlined into the function, the behavior will change.
+ *
+ * This function is called on the parent to disallow inlining of such variables,
+ */
+function handle_defined_after_hoist(parent) {
+    const defuns = [];
+    walk(parent, node => {
+        if (node === parent) return;
+        if (node instanceof AST_Defun) {
+            defuns.push(node);
+            return true;
+        }
+        if (
+            node instanceof AST_Scope
+            || node instanceof AST_SimpleStatement
+        ) return true;
+    });
+
+    // `defun` id to array of `defun` it uses
+    const defun_dependencies_map = new Map();
+    // `defun` id to array of enclosing `def` that are used by the function
+    const dependencies_map = new Map();
+    // all symbol ids that will be tracked for read/write
+    const symbols_of_interest = new Set();
+    const defuns_of_interest = new Set();
+
+    for (const defun of defuns) {
+        const fname_def = defun.name.definition();
+        const enclosing_defs = [];
+
+        for (const def of defun.enclosed) {
+            if (
+                def.fixed === false
+                || def === fname_def
+                || def.scope.get_defun_scope() !== parent
+            ) {
+                continue;
+            }
+
+            symbols_of_interest.add(def.id);
+
+            // found a reference to another function
+            if (
+                def.assignments === 0
+                && def.orig.length === 1
+                && def.orig[0] instanceof AST_SymbolDefun
+            ) {
+                defuns_of_interest.add(def.id);
+                symbols_of_interest.add(def.id);
+
+                defuns_of_interest.add(fname_def.id);
+                symbols_of_interest.add(fname_def.id);
+
+                if (!defun_dependencies_map.has(fname_def.id)) {
+                    defun_dependencies_map.set(fname_def.id, []);
+                }
+                defun_dependencies_map.get(fname_def.id).push(def.id);
+
+                continue;
+            }
+
+            enclosing_defs.push(def);
+        }
+
+        if (enclosing_defs.length) {
+            dependencies_map.set(fname_def.id, enclosing_defs);
+            defuns_of_interest.add(fname_def.id);
+            symbols_of_interest.add(fname_def.id);
+        }
+    }
+
+    // No defuns use outside constants
+    if (!dependencies_map.size) {
+        return;
+    }
+
+    // Increment to count "symbols of interest" (defuns or defs) that we found.
+    // These are tracked in AST order so we can check which is after which.
+    let symbol_index = 1;
+    // Map a defun ID to its first read (a `symbol_index`)
+    const defun_first_read_map = new Map();
+    // Map a symbol ID to its last write (a `symbol_index`)
+    const symbol_last_write_map = new Map();
+
+    walk_parent(parent, (node, walk_info) => {
+        if (node instanceof AST_Symbol && node.thedef) {
+            const id = node.definition().id;
+
+            symbol_index++;
+
+            // Track last-writes to symbols
+            if (symbols_of_interest.has(id)) {
+                if (node instanceof AST_SymbolDeclaration || is_lhs(node, walk_info.parent())) {
+                    symbol_last_write_map.set(id, symbol_index);
+                }
+            }
+
+            // Track first-reads of defuns (refined later)
+            if (defuns_of_interest.has(id)) {
+                if (!defun_first_read_map.has(id) && !is_recursive_ref(walk_info, id)) {
+                    defun_first_read_map.set(id, symbol_index);
+                }
+            }
+        }
+    });
+
+    // Refine `defun_first_read_map` to be as high as possible
+    for (const [defun, defun_first_read] of defun_first_read_map) {
+        // Update all dependencies of `defun`
+        const queue = new Set(defun_dependencies_map.get(defun));
+        for (const enclosed_defun of queue) {
+            let enclosed_defun_first_read = defun_first_read_map.get(enclosed_defun);
+            if (enclosed_defun_first_read != null && enclosed_defun_first_read < defun_first_read) {
+                continue;
+            }
+
+            defun_first_read_map.set(enclosed_defun, defun_first_read);
+
+            for (const enclosed_enclosed_defun of defun_dependencies_map.get(enclosed_defun) || []) {
+                queue.add(enclosed_enclosed_defun);
+            }
+        }
+    }
+
+    // ensure write-then-read order, otherwise clear `fixed`
+    // This is safe because last-writes (found_symbol_writes) are assumed to be as late as possible, and first-reads (defun_first_read_map) are assumed to be as early as possible.
+    for (const [defun, defs] of dependencies_map) {
+        const defun_first_read = defun_first_read_map.get(defun);
+        if (defun_first_read === undefined) {
+            continue;
+        }
+
+        for (const def of defs) {
+            if (def.fixed === false) {
+                continue;
+            }
+
+            let def_last_write = symbol_last_write_map.get(def.id) || 0;
+
+            if (defun_first_read < def_last_write) {
+                def.fixed = false;
+            }
+        }
+    }
+}
+
+def_reduce_vars(AST_Lambda, mark_lambda);
+
+def_reduce_vars(AST_Do, function(tw, descend, compressor) {
+    reset_block_variables(compressor, this);
+    const saved_loop = tw.in_loop;
+    tw.in_loop = this;
+    push(tw);
+    this.body.walk(tw);
+    if (has_break_or_continue(this)) {
+        pop(tw);
+        push(tw);
+    }
+    this.condition.walk(tw);
+    pop(tw);
+    tw.in_loop = saved_loop;
+    return true;
+});
+
+def_reduce_vars(AST_For, function(tw, descend, compressor) {
+    reset_block_variables(compressor, this);
+    if (this.init) this.init.walk(tw);
+    const saved_loop = tw.in_loop;
+    tw.in_loop = this;
+    push(tw);
+    if (this.condition) this.condition.walk(tw);
+    this.body.walk(tw);
+    if (this.step) {
+        if (has_break_or_continue(this)) {
+            pop(tw);
+            push(tw);
+        }
+        this.step.walk(tw);
+    }
+    pop(tw);
+    tw.in_loop = saved_loop;
+    return true;
+});
+
+def_reduce_vars(AST_ForIn, function(tw, descend, compressor) {
+    reset_block_variables(compressor, this);
+    suppress(this.init);
+    this.object.walk(tw);
+    const saved_loop = tw.in_loop;
+    tw.in_loop = this;
+    push(tw);
+    this.body.walk(tw);
+    pop(tw);
+    tw.in_loop = saved_loop;
+    return true;
+});
+
+def_reduce_vars(AST_If, function(tw) {
+    this.condition.walk(tw);
+    push(tw);
+    this.body.walk(tw);
+    pop(tw);
+    if (this.alternative) {
+        push(tw);
+        this.alternative.walk(tw);
+        pop(tw);
+    }
+    return true;
+});
+
+def_reduce_vars(AST_LabeledStatement, function(tw) {
+    push(tw);
+    this.body.walk(tw);
+    pop(tw);
+    return true;
+});
+
+def_reduce_vars(AST_SymbolCatch, function() {
+    this.definition().fixed = false;
+});
+
+def_reduce_vars(AST_SymbolRef, function(tw, descend, compressor) {
+    var d = this.definition();
+    d.references.push(this);
+    if (d.references.length == 1
+        && !d.fixed
+        && d.orig[0] instanceof AST_SymbolDefun) {
+        tw.loop_ids.set(d.id, tw.in_loop);
+    }
+    var fixed_value;
+    if (d.fixed === undefined || !safe_to_read(tw, d)) {
+        d.fixed = false;
+    } else if (d.fixed) {
+        fixed_value = this.fixed_value();
+        if (
+            fixed_value instanceof AST_Lambda
+            && is_recursive_ref(tw, d)
+        ) {
+            d.recursive_refs++;
+        } else if (fixed_value
+            && !compressor.exposed(d)
+            && ref_once(tw, compressor, d)
+        ) {
+            d.single_use =
+                fixed_value instanceof AST_Lambda && !fixed_value.pinned()
+                || fixed_value instanceof AST_Class
+                || d.scope === this.scope && fixed_value.is_constant_expression();
+        } else {
+            d.single_use = false;
+        }
+        if (is_modified(compressor, tw, this, fixed_value, 0, is_immutable(fixed_value))) {
+            if (d.single_use) {
+                d.single_use = "m";
+            } else {
+                d.fixed = false;
+            }
+        }
+    }
+    mark_escaped(tw, d, this.scope, this, fixed_value, 0, 1);
+});
+
+def_reduce_vars(AST_Toplevel, function(tw, descend, compressor) {
+    this.globals.forEach(function(def) {
+        reset_def(compressor, def);
+    });
+    reset_variables(tw, compressor, this);
+    descend();
+    handle_defined_after_hoist(this);
+    return true;
+});
+
+def_reduce_vars(AST_Try, function(tw, descend, compressor) {
+    reset_block_variables(compressor, this);
+    push(tw);
+    this.body.walk(tw);
+    pop(tw);
+    if (this.bcatch) {
+        push(tw);
+        this.bcatch.walk(tw);
+        pop(tw);
+    }
+    if (this.bfinally) this.bfinally.walk(tw);
+    return true;
+});
+
+def_reduce_vars(AST_Unary, function(tw) {
+    var node = this;
+    if (node.operator !== "++" && node.operator !== "--") return;
+    var exp = node.expression;
+    if (!(exp instanceof AST_SymbolRef)) return;
+    var def = exp.definition();
+    var safe = safe_to_assign(tw, def, exp.scope, true);
+    def.assignments++;
+    if (!safe) return;
+    var fixed = def.fixed;
+    if (!fixed) return;
+    def.references.push(exp);
+    def.chained = true;
+    def.fixed = function() {
+        return make_node(AST_Binary, node, {
+            operator: node.operator.slice(0, -1),
+            left: make_node(AST_UnaryPrefix, node, {
+                operator: "+",
+                expression: fixed instanceof AST_Node ? fixed : fixed()
+            }),
+            right: make_node(AST_Number, node, {
+                value: 1
+            })
+        });
+    };
+    mark(tw, def, true);
+    return true;
+});
+
+def_reduce_vars(AST_VarDef, function(tw, descend) {
+    var node = this;
+    if (node.name instanceof AST_Destructuring) {
+        suppress(node.name);
+        return;
+    }
+    var d = node.name.definition();
+    if (node.value) {
+        if (safe_to_assign(tw, d, node.name.scope, node.value)) {
+            d.fixed = function() {
+                return node.value;
+            };
+            tw.loop_ids.set(d.id, tw.in_loop);
+            mark(tw, d, false);
+            descend();
+            mark(tw, d, true);
+            return true;
+        } else {
+            d.fixed = false;
+        }
+    }
+});
+
+def_reduce_vars(AST_UsingDef, function() {
+    suppress(this.name);
+});
+
+def_reduce_vars(AST_While, function(tw, descend, compressor) {
+    reset_block_variables(compressor, this);
+    const saved_loop = tw.in_loop;
+    tw.in_loop = this;
+    push(tw);
+    descend();
+    pop(tw);
+    tw.in_loop = saved_loop;
+    return true;
+});
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+function loop_body(x) {
+    if (x instanceof AST_IterationStatement) {
+        return x.body instanceof AST_BlockStatement ? x.body : x;
+    }
+    return x;
+}
+
+function is_lhs_read_only(lhs) {
+    if (lhs instanceof AST_This) return true;
+    if (lhs instanceof AST_SymbolRef) return lhs.definition().orig[0] instanceof AST_SymbolLambda;
+    if (lhs instanceof AST_PropAccess) {
+        lhs = lhs.expression;
+        if (lhs instanceof AST_SymbolRef) {
+            if (lhs.is_immutable()) return false;
+            lhs = lhs.fixed_value();
+        }
+        if (!lhs) return true;
+        if (lhs instanceof AST_RegExp) return false;
+        if (lhs instanceof AST_Constant) return true;
+        return is_lhs_read_only(lhs);
+    }
+    return false;
+}
+
+/** var a = 1 --> var a*/
+function remove_initializers(var_statement) {
+    var decls = [];
+    var_statement.definitions.forEach(function(def) {
+        if (def.name instanceof AST_SymbolDeclaration) {
+            def.value = null;
+            decls.push(def);
+        } else {
+            def.declarations_as_names().forEach(name => {
+                decls.push(make_node(AST_VarDef, def, {
+                    name,
+                    value: null
+                }));
+            });
+        }
+    });
+    return decls.length ? make_node(AST_Var, var_statement, { definitions: decls }) : null;
+}
+
+/** Called on code which won't be executed but has an effect outside of itself: `var`, `function` statements, `export`, `import`. */
+function extract_from_unreachable_code(compressor, stat, target) {
+    walk(stat, node => {
+        if (node instanceof AST_Var) {
+            const no_initializers = remove_initializers(node);
+            if (no_initializers) target.push(no_initializers);
+            return true;
+        }
+        if (
+            node instanceof AST_Defun
+            && (node === stat || !compressor.has_directive("use strict"))
+        ) {
+            target.push(node === stat ? node : make_node(AST_Var, node, {
+                definitions: [
+                    make_node(AST_VarDef, node, {
+                        name: make_node(AST_SymbolVar, node.name, node.name),
+                        value: null
+                    })
+                ]
+            }));
+            return true;
+        }
+        if (node instanceof AST_Export || node instanceof AST_Import) {
+            target.push(node);
+            return true;
+        }
+        if (node instanceof AST_Scope || node instanceof AST_Class) {
+            // Do not go into nested scopes
+            return true;
+        }
+    });
+}
+
+/** Tighten a bunch of statements together, and perform statement-level optimization. */
+function tighten_body(statements, compressor) {
+    const nearest_scope = compressor.find_scope();
+    const defun_scope = nearest_scope.get_defun_scope();
+    const { in_loop, in_try } = find_loop_scope_try();
+
+    var CHANGED, max_iter = 10;
+    do {
+        CHANGED = false;
+        eliminate_spurious_blocks(statements);
+        if (compressor.option("dead_code")) {
+            eliminate_dead_code(statements, compressor);
+        }
+        if (compressor.option("if_return")) {
+            handle_if_return(statements, compressor);
+        }
+        if (compressor.sequences_limit > 0) {
+            sequencesize(statements, compressor);
+            sequencesize_2(statements, compressor);
+        }
+        if (compressor.option("join_vars")) {
+            join_consecutive_vars(statements);
+        }
+        if (compressor.option("collapse_vars")) {
+            collapse(statements, compressor);
+        }
+    } while (CHANGED && max_iter-- > 0);
+
+    function find_loop_scope_try() {
+        var node = compressor.self(), level = 0, in_loop = false, in_try = false;
+        do {
+            if (node instanceof AST_IterationStatement) {
+                in_loop = true;
+            } else if (node instanceof AST_Scope) {
+                break;
+            } else if (node instanceof AST_TryBlock) {
+                in_try = true;
+            }
+        } while (node = compressor.parent(level++));
+
+        return { in_loop, in_try };
+    }
+
+    // Search from right to left for assignment-like expressions:
+    // - `var a = x;`
+    // - `a = x;`
+    // - `++a`
+    // For each candidate, scan from left to right for first usage, then try
+    // to fold assignment into the site for compression.
+    // Will not attempt to collapse assignments into or past code blocks
+    // which are not sequentially executed, e.g. loops and conditionals.
+    function collapse(statements, compressor) {
+        if (nearest_scope.pinned() || defun_scope.pinned())
+            return statements;
+        var args;
+        var candidates = [];
+        var stat_index = statements.length;
+        var scanner = new TreeTransformer(function (node) {
+            if (abort)
+                return node;
+            // Skip nodes before `candidate` as quickly as possible
+            if (!hit) {
+                if (node !== hit_stack[hit_index])
+                    return node;
+                hit_index++;
+                if (hit_index < hit_stack.length)
+                    return handle_custom_scan_order(node);
+                hit = true;
+                stop_after = find_stop(node, 0);
+                if (stop_after === node)
+                    abort = true;
+                return node;
+            }
+            // Stop immediately if these node types are encountered
+            var parent = scanner.parent();
+            if (node instanceof AST_Assign
+                    && (node.logical || node.operator != "=" && lhs.equivalent_to(node.left))
+                || node instanceof AST_Await
+                || node instanceof AST_Using
+                || node instanceof AST_Call && lhs instanceof AST_PropAccess && lhs.equivalent_to(node.expression)
+                ||
+                    (node instanceof AST_Call || node instanceof AST_PropAccess)
+                    && node.optional
+                || node instanceof AST_Debugger
+                || node instanceof AST_Destructuring
+                || node instanceof AST_Expansion
+                    && node.expression instanceof AST_Symbol
+                    && (
+                        node.expression instanceof AST_This
+                        || node.expression.definition().references.length > 1
+                    )
+                || node instanceof AST_IterationStatement && !(node instanceof AST_For)
+                || node instanceof AST_LoopControl
+                || node instanceof AST_Try
+                || node instanceof AST_With
+                || node instanceof AST_Yield
+                || node instanceof AST_Export
+                || node instanceof AST_Class
+                || parent instanceof AST_For && node !== parent.init
+                || !replace_all
+                    && (
+                        node instanceof AST_SymbolRef
+                        && !node.is_declared(compressor)
+                        && !pure_prop_access_globals.has(node)
+                    )
+                || node instanceof AST_SymbolRef
+                    && parent instanceof AST_Call
+                    && has_annotation(parent, _NOINLINE)
+                || node instanceof AST_ObjectProperty && node.key instanceof AST_Node
+            ) {
+                abort = true;
+                return node;
+            }
+            // Stop only if candidate is found within conditional branches
+            if (!stop_if_hit && (!lhs_local || !replace_all)
+                && (parent instanceof AST_Binary && lazy_op.has(parent.operator) && parent.left !== node
+                    || parent instanceof AST_Conditional && parent.condition !== node
+                    || parent instanceof AST_If && parent.condition !== node)) {
+                stop_if_hit = parent;
+            }
+            // Replace variable with assignment when found
+            if (
+                can_replace
+                && !(node instanceof AST_SymbolDeclaration)
+                && lhs.equivalent_to(node)
+                && !shadows(scanner.find_scope() || nearest_scope, lvalues)
+            ) {
+                if (stop_if_hit) {
+                    abort = true;
+                    return node;
+                }
+                if (is_lhs(node, parent)) {
+                    if (value_def)
+                        replaced++;
+                    return node;
+                } else {
+                    replaced++;
+                    if (value_def && candidate instanceof AST_VarDef)
+                        return node;
+                }
+                CHANGED = abort = true;
+                if (candidate instanceof AST_UnaryPostfix) {
+                    return make_node(AST_UnaryPrefix, candidate, candidate);
+                }
+                if (candidate instanceof AST_VarDef) {
+                    var def = candidate.name.definition();
+                    var value = candidate.value;
+                    if (def.references.length - def.replaced == 1 && !compressor.exposed(def)) {
+                        def.replaced++;
+                        if (funarg && is_identifier_atom(value)) {
+                            return value.transform(compressor);
+                        } else {
+                            return maintain_this_binding(parent, node, value);
+                        }
+                    }
+                    return make_node(AST_Assign, candidate, {
+                        operator: "=",
+                        logical: false,
+                        left: make_node(AST_SymbolRef, candidate.name, candidate.name),
+                        right: value
+                    });
+                }
+                clear_flag(candidate, WRITE_ONLY);
+                return candidate;
+            }
+            // These node types have child nodes that execute sequentially,
+            // but are otherwise not safe to scan into or beyond them.
+            var sym;
+            if (node instanceof AST_Call
+                || node instanceof AST_Exit
+                && (side_effects || lhs instanceof AST_PropAccess || may_modify(lhs))
+                || node instanceof AST_PropAccess
+                && (side_effects || node.expression.may_throw_on_access(compressor))
+                || node instanceof AST_SymbolRef
+                && ((lvalues.has(node.name) && lvalues.get(node.name).modified) || side_effects && may_modify(node))
+                || node instanceof AST_VarDef && node.value
+                && (lvalues.has(node.name.name) || side_effects && may_modify(node.name))
+                || node instanceof AST_Using
+                || (sym = is_lhs(node.left, node))
+                && (sym instanceof AST_PropAccess || lvalues.has(sym.name))
+                || may_throw
+                && (in_try ? node.has_side_effects(compressor) : side_effects_external(node))) {
+                stop_after = node;
+                if (node instanceof AST_Scope)
+                    abort = true;
+            }
+            return handle_custom_scan_order(node);
+        }, function (node) {
+            if (abort)
+                return;
+            if (stop_after === node)
+                abort = true;
+            if (stop_if_hit === node)
+                stop_if_hit = null;
+        });
+
+        var multi_replacer = new TreeTransformer(function (node) {
+            if (abort)
+                return node;
+            // Skip nodes before `candidate` as quickly as possible
+            if (!hit) {
+                if (node !== hit_stack[hit_index])
+                    return node;
+                hit_index++;
+                if (hit_index < hit_stack.length)
+                    return;
+                hit = true;
+                return node;
+            }
+            // Replace variable when found
+            if (node instanceof AST_SymbolRef
+                && node.name == def.name) {
+                if (!--replaced)
+                    abort = true;
+                if (is_lhs(node, multi_replacer.parent()))
+                    return node;
+                def.replaced++;
+                value_def.replaced--;
+                return candidate.value;
+            }
+            // Skip (non-executed) functions and (leading) default case in switch statements
+            if (node instanceof AST_Default || node instanceof AST_Scope)
+                return node;
+        });
+
+        while (--stat_index >= 0) {
+            // Treat parameters as collapsible in IIFE, i.e.
+            //   function(a, b){ ... }(x());
+            // would be translated into equivalent assignments:
+            //   var a = x(), b = undefined;
+            if (stat_index == 0 && compressor.option("unused"))
+                extract_args();
+            // Find collapsible assignments
+            var hit_stack = [];
+            extract_candidates(statements[stat_index]);
+            while (candidates.length > 0) {
+                hit_stack = candidates.pop();
+                var hit_index = 0;
+                var candidate = hit_stack[hit_stack.length - 1];
+                var value_def = null;
+                var stop_after = null;
+                var stop_if_hit = null;
+                var lhs = get_lhs(candidate);
+                if (!lhs || is_lhs_read_only(lhs) || lhs.has_side_effects(compressor))
+                    continue;
+                // Locate symbols which may execute code outside of scanning range
+                var lvalues = get_lvalues(candidate);
+                var lhs_local = is_lhs_local(lhs);
+                if (lhs instanceof AST_SymbolRef) {
+                    lvalues.set(lhs.name, { def: lhs.definition(), modified: false });
+                }
+                var side_effects = value_has_side_effects(candidate);
+                var replace_all = replace_all_symbols();
+                var may_throw = candidate.may_throw(compressor);
+                var funarg = candidate.name instanceof AST_SymbolFunarg;
+                var hit = funarg;
+                var abort = false, replaced = 0, can_replace = !args || !hit;
+                if (!can_replace) {
+                    for (
+                        let j = compressor.self().argnames.lastIndexOf(candidate.name) + 1;
+                        !abort && j < args.length;
+                        j++
+                    ) {
+                        args[j].transform(scanner);
+                    }
+                    can_replace = true;
+                }
+                for (var i = stat_index; !abort && i < statements.length; i++) {
+                    statements[i].transform(scanner);
+                }
+                if (value_def) {
+                    var def = candidate.name.definition();
+                    if (abort && def.references.length - def.replaced > replaced)
+                        replaced = false;
+                    else {
+                        abort = false;
+                        hit_index = 0;
+                        hit = funarg;
+                        for (var i = stat_index; !abort && i < statements.length; i++) {
+                            statements[i].transform(multi_replacer);
+                        }
+                        value_def.single_use = false;
+                    }
+                }
+                if (replaced && !remove_candidate(candidate))
+                    statements.splice(stat_index, 1);
+            }
+        }
+
+        function handle_custom_scan_order(node) {
+            // Skip (non-executed) functions
+            if (node instanceof AST_Scope)
+                return node;
+
+            // Scan case expressions first in a switch statement
+            if (node instanceof AST_Switch) {
+                node.expression = node.expression.transform(scanner);
+                for (var i = 0, len = node.body.length; !abort && i < len; i++) {
+                    var branch = node.body[i];
+                    if (branch instanceof AST_Case) {
+                        if (!hit) {
+                            if (branch !== hit_stack[hit_index])
+                                continue;
+                            hit_index++;
+                        }
+                        branch.expression = branch.expression.transform(scanner);
+                        if (!replace_all)
+                            break;
+                    }
+                }
+                abort = true;
+                return node;
+            }
+        }
+
+        function redefined_within_scope(def, scope) {
+            if (def.global)
+                return false;
+            let cur_scope = def.scope;
+            while (cur_scope && cur_scope !== scope) {
+                if (cur_scope.variables.has(def.name)) {
+                    return true;
+                }
+                cur_scope = cur_scope.parent_scope;
+            }
+            return false;
+        }
+
+        function has_overlapping_symbol(fn, arg, fn_strict) {
+            var found = false, scan_this = !(fn instanceof AST_Arrow);
+            arg.walk(new TreeWalker(function (node, descend) {
+                if (found)
+                    return true;
+                if (node instanceof AST_SymbolRef && (fn.variables.has(node.name) || redefined_within_scope(node.definition(), fn))) {
+                    var s = node.definition().scope;
+                    if (s !== defun_scope)
+                        while (s = s.parent_scope) {
+                            if (s === defun_scope)
+                                return true;
+                        }
+                    return found = true;
+                }
+                if ((fn_strict || scan_this) && node instanceof AST_This) {
+                    return found = true;
+                }
+                if (node instanceof AST_Scope && !(node instanceof AST_Arrow)) {
+                    var prev = scan_this;
+                    scan_this = false;
+                    descend();
+                    scan_this = prev;
+                    return true;
+                }
+            }));
+            return found;
+        }
+
+        function arg_is_injectable(arg) {
+            if (arg instanceof AST_Expansion) return false;
+            const contains_await = walk(arg, (node) => {
+                if (node instanceof AST_Await) return walk_abort;
+            });
+            if (contains_await) return false;
+            return true;
+        }
+        function extract_args() {
+            var iife, fn = compressor.self();
+            if (is_func_expr(fn)
+                && !fn.name
+                && !fn.uses_arguments
+                && !fn.pinned()
+                && (iife = compressor.parent()) instanceof AST_Call
+                && iife.expression === fn
+                && iife.args.every(arg_is_injectable)
+            ) {
+                var fn_strict = compressor.has_directive("use strict");
+                if (fn_strict && !member(fn_strict, fn.body))
+                    fn_strict = false;
+                var len = fn.argnames.length;
+                args = iife.args.slice(len);
+                var names = new Set();
+                for (var i = len; --i >= 0;) {
+                    var sym = fn.argnames[i];
+                    var arg = iife.args[i];
+                    // The following two line fix is a duplicate of the fix at
+                    // https://github.com/terser/terser/commit/011d3eb08cefe6922c7d1bdfa113fc4aeaca1b75
+                    // This might mean that these two pieces of code (one here in collapse_vars and another in reduce_vars
+                    // Might be doing the exact same thing.
+                    const def = sym.definition && sym.definition();
+                    const is_reassigned = def && def.orig.length > 1;
+                    if (is_reassigned)
+                        continue;
+                    args.unshift(make_node(AST_VarDef, sym, {
+                        name: sym,
+                        value: arg
+                    }));
+                    if (names.has(sym.name))
+                        continue;
+                    names.add(sym.name);
+                    if (sym instanceof AST_Expansion) {
+                        var elements = iife.args.slice(i);
+                        if (elements.every((arg) => !has_overlapping_symbol(fn, arg, fn_strict)
+                        )) {
+                            candidates.unshift([make_node(AST_VarDef, sym, {
+                                name: sym.expression,
+                                value: make_node(AST_Array, iife, {
+                                    elements: elements
+                                })
+                            })]);
+                        }
+                    } else {
+                        if (!arg) {
+                            arg = make_void_0(sym).transform(compressor);
+                        } else if (arg instanceof AST_Lambda && arg.pinned()
+                            || has_overlapping_symbol(fn, arg, fn_strict)) {
+                            arg = null;
+                        }
+                        if (arg)
+                            candidates.unshift([make_node(AST_VarDef, sym, {
+                                name: sym,
+                                value: arg
+                            })]);
+                    }
+                }
+            }
+        }
+
+        function extract_candidates(expr) {
+            hit_stack.push(expr);
+            if (expr instanceof AST_Assign) {
+                if (!expr.left.has_side_effects(compressor)
+                    && !(expr.right instanceof AST_Chain)) {
+                    candidates.push(hit_stack.slice());
+                }
+                extract_candidates(expr.right);
+            } else if (expr instanceof AST_Binary) {
+                extract_candidates(expr.left);
+                extract_candidates(expr.right);
+            } else if (expr instanceof AST_Call && !has_annotation(expr, _NOINLINE)) {
+                extract_candidates(expr.expression);
+                expr.args.forEach(extract_candidates);
+            } else if (expr instanceof AST_Case) {
+                extract_candidates(expr.expression);
+            } else if (expr instanceof AST_Conditional) {
+                extract_candidates(expr.condition);
+                extract_candidates(expr.consequent);
+                extract_candidates(expr.alternative);
+            } else if (expr instanceof AST_Definitions) {
+                var len = expr.definitions.length;
+                // limit number of trailing variable definitions for consideration
+                var i = len - 200;
+                if (i < 0)
+                    i = 0;
+                for (; i < len; i++) {
+                    extract_candidates(expr.definitions[i]);
+                }
+            } else if (expr instanceof AST_DWLoop) {
+                extract_candidates(expr.condition);
+                if (!(expr.body instanceof AST_Block)) {
+                    extract_candidates(expr.body);
+                }
+            } else if (expr instanceof AST_Exit) {
+                if (expr.value)
+                    extract_candidates(expr.value);
+            } else if (expr instanceof AST_For) {
+                if (expr.init)
+                    extract_candidates(expr.init);
+                if (expr.condition)
+                    extract_candidates(expr.condition);
+                if (expr.step)
+                    extract_candidates(expr.step);
+                if (!(expr.body instanceof AST_Block)) {
+                    extract_candidates(expr.body);
+                }
+            } else if (expr instanceof AST_ForIn) {
+                extract_candidates(expr.object);
+                if (!(expr.body instanceof AST_Block)) {
+                    extract_candidates(expr.body);
+                }
+            } else if (expr instanceof AST_If) {
+                extract_candidates(expr.condition);
+                if (!(expr.body instanceof AST_Block)) {
+                    extract_candidates(expr.body);
+                }
+                if (expr.alternative && !(expr.alternative instanceof AST_Block)) {
+                    extract_candidates(expr.alternative);
+                }
+            } else if (expr instanceof AST_Sequence) {
+                expr.expressions.forEach(extract_candidates);
+            } else if (expr instanceof AST_SimpleStatement) {
+                extract_candidates(expr.body);
+            } else if (expr instanceof AST_Switch) {
+                extract_candidates(expr.expression);
+                expr.body.forEach(extract_candidates);
+            } else if (expr instanceof AST_Unary) {
+                if (expr.operator == "++" || expr.operator == "--") {
+                    candidates.push(hit_stack.slice());
+                }
+            } else if (expr instanceof AST_VarDef) {
+                if (expr.value && !(expr.value instanceof AST_Chain)) {
+                    candidates.push(hit_stack.slice());
+                    extract_candidates(expr.value);
+                }
+            }
+            hit_stack.pop();
+        }
+
+        function find_stop(node, level, write_only) {
+            var parent = scanner.parent(level);
+            if (parent instanceof AST_Assign) {
+                if (write_only
+                    && !parent.logical
+                    && !(parent.left instanceof AST_PropAccess
+                        || lvalues.has(parent.left.name))) {
+                    return find_stop(parent, level + 1, write_only);
+                }
+                return node;
+            }
+            if (parent instanceof AST_Binary) {
+                if (write_only && (!lazy_op.has(parent.operator) || parent.left === node)) {
+                    return find_stop(parent, level + 1, write_only);
+                }
+                return node;
+            }
+            if (parent instanceof AST_Call)
+                return node;
+            if (parent instanceof AST_Case)
+                return node;
+            if (parent instanceof AST_Conditional) {
+                if (write_only && parent.condition === node) {
+                    return find_stop(parent, level + 1, write_only);
+                }
+                return node;
+            }
+            if (parent instanceof AST_Definitions) {
+                return find_stop(parent, level + 1, true);
+            }
+            if (parent instanceof AST_Exit) {
+                return write_only ? find_stop(parent, level + 1, write_only) : node;
+            }
+            if (parent instanceof AST_If) {
+                if (write_only && parent.condition === node) {
+                    return find_stop(parent, level + 1, write_only);
+                }
+                return node;
+            }
+            if (parent instanceof AST_IterationStatement)
+                return node;
+            if (parent instanceof AST_Sequence) {
+                return find_stop(parent, level + 1, parent.tail_node() !== node);
+            }
+            if (parent instanceof AST_SimpleStatement) {
+                return find_stop(parent, level + 1, true);
+            }
+            if (parent instanceof AST_Switch)
+                return node;
+            if (parent instanceof AST_VarDef)
+                return node;
+            return null;
+        }
+
+        function mangleable_var(var_def) {
+            var value = var_def.value;
+            if (!(value instanceof AST_SymbolRef))
+                return;
+            if (value.name == "arguments")
+                return;
+            var def = value.definition();
+            if (def.undeclared)
+                return;
+            return value_def = def;
+        }
+
+        function get_lhs(expr) {
+            if (expr instanceof AST_Assign && expr.logical) {
+                return false;
+            } else if (expr instanceof AST_VarDef && expr.name instanceof AST_SymbolDeclaration) {
+                var def = expr.name.definition();
+                if (!member(expr.name, def.orig))
+                    return;
+                var referenced = def.references.length - def.replaced;
+                if (!referenced)
+                    return;
+                var declared = def.orig.length - def.eliminated;
+                if (declared > 1 && !(expr.name instanceof AST_SymbolFunarg)
+                    || (referenced > 1 ? mangleable_var(expr) : !compressor.exposed(def))) {
+                    return make_node(AST_SymbolRef, expr.name, expr.name);
+                }
+            } else {
+                const lhs = expr instanceof AST_Assign
+                    ? expr.left
+                    : expr.expression;
+                return !is_ref_of(lhs, AST_SymbolConst)
+                    && !is_ref_of(lhs, AST_SymbolLet)
+                    && !is_ref_of(lhs, AST_SymbolUsing)
+                    && lhs;
+            }
+        }
+
+        function get_rvalue(expr) {
+            if (expr instanceof AST_Assign) {
+                return expr.right;
+            } else {
+                return expr.value;
+            }
+        }
+
+        function get_lvalues(expr) {
+            var lvalues = new Map();
+            if (expr instanceof AST_Unary)
+                return lvalues;
+            var tw = new TreeWalker(function (node) {
+                var sym = node;
+                while (sym instanceof AST_PropAccess)
+                    sym = sym.expression;
+                if (sym instanceof AST_SymbolRef) {
+                    const prev = lvalues.get(sym.name);
+                    if (!prev || !prev.modified) {
+                        lvalues.set(sym.name, {
+                            def: sym.definition(),
+                            modified: is_modified(compressor, tw, node, node, 0)
+                        });
+                    }
+                }
+            });
+            get_rvalue(expr).walk(tw);
+            return lvalues;
+        }
+
+        function remove_candidate(expr) {
+            if (expr.name instanceof AST_SymbolFunarg) {
+                var iife = compressor.parent(), argnames = compressor.self().argnames;
+                var index = argnames.indexOf(expr.name);
+                if (index < 0) {
+                    iife.args.length = Math.min(iife.args.length, argnames.length - 1);
+                } else {
+                    var args = iife.args;
+                    if (args[index])
+                        args[index] = make_node(AST_Number, args[index], {
+                            value: 0
+                        });
+                }
+                return true;
+            }
+            var found = false;
+            return statements[stat_index].transform(new TreeTransformer(function (node, descend, in_list) {
+                if (found)
+                    return node;
+                if (node === expr || node.body === expr) {
+                    found = true;
+                    if (node instanceof AST_VarDef) {
+                        node.value = node.name instanceof AST_SymbolConst
+                            ? make_void_0(node.value) // `const` always needs value.
+                            : null;
+                        return node;
+                    }
+                    return in_list ? MAP.skip : null;
+                }
+            }, function (node) {
+                if (node instanceof AST_Sequence)
+                    switch (node.expressions.length) {
+                        case 0: return null;
+                        case 1: return node.expressions[0];
+                    }
+            }));
+        }
+
+        function is_lhs_local(lhs) {
+            while (lhs instanceof AST_PropAccess)
+                lhs = lhs.expression;
+            return lhs instanceof AST_SymbolRef
+                && lhs.definition().scope.get_defun_scope() === defun_scope
+                && !(in_loop
+                    && (lvalues.has(lhs.name)
+                        || candidate instanceof AST_Unary
+                        || (candidate instanceof AST_Assign
+                            && !candidate.logical
+                            && candidate.operator != "=")));
+        }
+
+        function value_has_side_effects(expr) {
+            if (expr instanceof AST_Unary)
+                return unary_side_effects.has(expr.operator);
+            return get_rvalue(expr).has_side_effects(compressor);
+        }
+
+        function replace_all_symbols() {
+            if (side_effects)
+                return false;
+            if (value_def)
+                return true;
+            if (lhs instanceof AST_SymbolRef) {
+                var def = lhs.definition();
+                if (def.references.length - def.replaced == (candidate instanceof AST_VarDef ? 1 : 2)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        function may_modify(sym) {
+            if (!sym.definition)
+                return true; // AST_Destructuring
+            var def = sym.definition();
+            if (def.orig.length == 1 && def.orig[0] instanceof AST_SymbolDefun)
+                return false;
+            if (def.scope.get_defun_scope() !== defun_scope)
+                return true;
+            return def.references.some((ref) =>
+                ref.scope.get_defun_scope() !== defun_scope
+            );
+        }
+
+        function side_effects_external(node, lhs) {
+            if (node instanceof AST_Assign)
+                return side_effects_external(node.left, true);
+            if (node instanceof AST_Unary)
+                return side_effects_external(node.expression, true);
+            if (node instanceof AST_VarDef)
+                return node.value && side_effects_external(node.value);
+            if (lhs) {
+                if (node instanceof AST_Dot)
+                    return side_effects_external(node.expression, true);
+                if (node instanceof AST_Sub)
+                    return side_effects_external(node.expression, true);
+                if (node instanceof AST_SymbolRef)
+                    return node.definition().scope.get_defun_scope() !== defun_scope;
+            }
+            return false;
+        }
+
+        /**
+         * Will any of the pulled-in lvalues shadow a variable in newScope or parents?
+         * similar to scope_encloses_variables_in_this_scope */
+        function shadows(my_scope, lvalues) {
+            for (const { def } of lvalues.values()) {
+                const looked_up = my_scope.find_variable(def.name);
+                if (looked_up) {
+                    if (looked_up === def) continue;
+                    return true;
+                }
+            }
+            return false;
+        }
+    }
+
+    function eliminate_spurious_blocks(statements) {
+        var seen_dirs = [];
+        for (var i = 0; i < statements.length;) {
+            var stat = statements[i];
+            if (stat instanceof AST_BlockStatement && stat.body.every(can_be_evicted_from_block)) {
+                CHANGED = true;
+                eliminate_spurious_blocks(stat.body);
+                statements.splice(i, 1, ...stat.body);
+                i += stat.body.length;
+            } else if (stat instanceof AST_EmptyStatement) {
+                CHANGED = true;
+                statements.splice(i, 1);
+            } else if (stat instanceof AST_Directive) {
+                if (seen_dirs.indexOf(stat.value) < 0) {
+                    i++;
+                    seen_dirs.push(stat.value);
+                } else {
+                    CHANGED = true;
+                    statements.splice(i, 1);
+                }
+            } else
+                i++;
+        }
+    }
+
+    function handle_if_return(statements, compressor) {
+        var self = compressor.self();
+        var multiple_if_returns = has_multiple_if_returns(statements);
+        var in_lambda = self instanceof AST_Lambda;
+        // Prevent extremely deep nesting
+        // https://github.com/terser/terser/issues/1432
+        // https://github.com/webpack/webpack/issues/17548
+        const iteration_start = Math.min(statements.length, 500);
+        for (var i = iteration_start; --i >= 0;) {
+            var stat = statements[i];
+            var j = next_index(i);
+            var next = statements[j];
+
+            if (in_lambda && !next && stat instanceof AST_Return) {
+                if (!stat.value) {
+                    CHANGED = true;
+                    statements.splice(i, 1);
+                    continue;
+                }
+                if (stat.value instanceof AST_UnaryPrefix && stat.value.operator == "void") {
+                    CHANGED = true;
+                    statements[i] = make_node(AST_SimpleStatement, stat, {
+                        body: stat.value.expression
+                    });
+                    continue;
+                }
+            }
+
+            if (stat instanceof AST_If) {
+                let ab, new_else;
+
+                ab = aborts(stat.body);
+                if (
+                    can_merge_flow(ab)
+                    && (new_else = as_statement_array_with_return(stat.body, ab))
+                ) {
+                    if (ab.label) {
+                        remove(ab.label.thedef.references, ab);
+                    }
+                    CHANGED = true;
+                    stat = stat.clone();
+                    stat.condition = stat.condition.negate(compressor);
+                    stat.body = make_node(AST_BlockStatement, stat, {
+                        body: as_statement_array(stat.alternative).concat(extract_defuns())
+                    });
+                    stat.alternative = make_node(AST_BlockStatement, stat, {
+                        body: new_else
+                    });
+                    statements[i] = stat.transform(compressor);
+                    continue;
+                }
+
+                ab = aborts(stat.alternative);
+                if (
+                    can_merge_flow(ab)
+                    && (new_else = as_statement_array_with_return(stat.alternative, ab))
+                ) {
+                    if (ab.label) {
+                        remove(ab.label.thedef.references, ab);
+                    }
+                    CHANGED = true;
+                    stat = stat.clone();
+                    stat.body = make_node(AST_BlockStatement, stat.body, {
+                        body: as_statement_array(stat.body).concat(extract_defuns())
+                    });
+                    stat.alternative = make_node(AST_BlockStatement, stat.alternative, {
+                        body: new_else
+                    });
+                    statements[i] = stat.transform(compressor);
+                    continue;
+                }
+            }
+
+            if (stat instanceof AST_If && stat.body instanceof AST_Return) {
+                var value = stat.body.value;
+                //---
+                // pretty silly case, but:
+                // if (foo()) return; return; ==> foo(); return;
+                if (!value && !stat.alternative
+                    && (in_lambda && !next || next instanceof AST_Return && !next.value)) {
+                    CHANGED = true;
+                    statements[i] = make_node(AST_SimpleStatement, stat.condition, {
+                        body: stat.condition
+                    });
+                    continue;
+                }
+                //---
+                // if (foo()) return x; return y; ==> return foo() ? x : y;
+                if (value && !stat.alternative && next instanceof AST_Return && next.value) {
+                    CHANGED = true;
+                    stat = stat.clone();
+                    stat.alternative = next;
+                    statements[i] = stat.transform(compressor);
+                    statements.splice(j, 1);
+                    continue;
+                }
+                //---
+                // if (foo()) return x; [ return ; ] ==> return foo() ? x : undefined;
+                if (value && !stat.alternative
+                    && (!next && in_lambda && multiple_if_returns
+                        || next instanceof AST_Return)) {
+                    CHANGED = true;
+                    stat = stat.clone();
+                    stat.alternative = next || make_node(AST_Return, stat, {
+                        value: null
+                    });
+                    statements[i] = stat.transform(compressor);
+                    if (next)
+                        statements.splice(j, 1);
+                    continue;
+                }
+                //---
+                // if (a) return b; if (c) return d; e; ==> return a ? b : c ? d : void e;
+                //
+                // if sequences is not enabled, this can lead to an endless loop (issue #866).
+                // however, with sequences on this helps producing slightly better output for
+                // the example code.
+                var prev = statements[prev_index(i)];
+                if (compressor.option("sequences") && in_lambda && !stat.alternative
+                    && prev instanceof AST_If && prev.body instanceof AST_Return
+                    && next_index(j) == statements.length && next instanceof AST_SimpleStatement) {
+                    CHANGED = true;
+                    stat = stat.clone();
+                    stat.alternative = make_node(AST_BlockStatement, next, {
+                        body: [
+                            next,
+                            make_node(AST_Return, next, {
+                                value: null
+                            })
+                        ]
+                    });
+                    statements[i] = stat.transform(compressor);
+                    statements.splice(j, 1);
+                    continue;
+                }
+            }
+        }
+
+        function has_multiple_if_returns(statements) {
+            var n = 0;
+            for (var i = statements.length; --i >= 0;) {
+                var stat = statements[i];
+                if (stat instanceof AST_If && stat.body instanceof AST_Return) {
+                    if (++n > 1)
+                        return true;
+                }
+            }
+            return false;
+        }
+
+        function is_return_void(value) {
+            return !value || value instanceof AST_UnaryPrefix && value.operator == "void";
+        }
+
+        function can_merge_flow(ab) {
+            if (!ab)
+                return false;
+            for (var j = i + 1, len = statements.length; j < len; j++) {
+                var stat = statements[j];
+                if (stat instanceof AST_DefinitionsLike && !(stat instanceof AST_Var))
+                    return false;
+            }
+            var lct = ab instanceof AST_LoopControl ? compressor.loopcontrol_target(ab) : null;
+            return ab instanceof AST_Return && in_lambda && is_return_void(ab.value)
+                || ab instanceof AST_Continue && self === loop_body(lct)
+                || ab instanceof AST_Break && lct instanceof AST_BlockStatement && self === lct;
+        }
+
+        function extract_defuns() {
+            var tail = statements.slice(i + 1);
+            statements.length = i + 1;
+            return tail.filter(function (stat) {
+                if (stat instanceof AST_Defun) {
+                    statements.push(stat);
+                    return false;
+                }
+                return true;
+            });
+        }
+
+        function as_statement_array_with_return(node, ab) {
+            var body = as_statement_array(node);
+            if (ab !== body[body.length - 1]) {
+                return undefined;
+            }
+            body = body.slice(0, -1);
+            if (!body.every(stat => can_be_evicted_from_block(stat))) {
+                return undefined;
+            }
+            if (ab.value) {
+                body.push(make_node(AST_SimpleStatement, ab.value, {
+                    body: ab.value.expression
+                }));
+            }
+            return body;
+        }
+
+        function next_index(i) {
+            for (var j = i + 1, len = statements.length; j < len; j++) {
+                var stat = statements[j];
+                if (!(stat instanceof AST_Var && declarations_only(stat))) {
+                    break;
+                }
+            }
+            return j;
+        }
+
+        function prev_index(i) {
+            for (var j = i; --j >= 0;) {
+                var stat = statements[j];
+                if (!(stat instanceof AST_Var && declarations_only(stat))) {
+                    break;
+                }
+            }
+            return j;
+        }
+    }
+
+    function eliminate_dead_code(statements, compressor) {
+        var has_quit;
+        var self = compressor.self();
+        for (var i = 0, n = 0, len = statements.length; i < len; i++) {
+            var stat = statements[i];
+            if (stat instanceof AST_LoopControl) {
+                var lct = compressor.loopcontrol_target(stat);
+                if (stat instanceof AST_Break
+                    && !(lct instanceof AST_IterationStatement)
+                    && loop_body(lct) === self
+                    || stat instanceof AST_Continue
+                    && loop_body(lct) === self) {
+                    if (stat.label) {
+                        remove(stat.label.thedef.references, stat);
+                    }
+                } else {
+                    statements[n++] = stat;
+                }
+            } else {
+                statements[n++] = stat;
+            }
+            if (aborts(stat)) {
+                has_quit = statements.slice(i + 1);
+                break;
+            }
+        }
+        statements.length = n;
+        CHANGED = n != len;
+        if (has_quit)
+            has_quit.forEach(function (stat) {
+                extract_from_unreachable_code(compressor, stat, statements);
+            });
+    }
+
+    function declarations_only(node) {
+        return node.definitions.every((var_def) => !var_def.value);
+    }
+
+    function sequencesize(statements, compressor) {
+        if (statements.length < 2)
+            return;
+        var seq = [], n = 0;
+        function push_seq() {
+            if (!seq.length)
+                return;
+            var body = make_sequence(seq[0], seq);
+            statements[n++] = make_node(AST_SimpleStatement, body, { body: body });
+            seq = [];
+        }
+        for (var i = 0, len = statements.length; i < len; i++) {
+            var stat = statements[i];
+            if (stat instanceof AST_SimpleStatement) {
+                if (seq.length >= compressor.sequences_limit)
+                    push_seq();
+                var body = stat.body;
+                if (seq.length > 0)
+                    body = body.drop_side_effect_free(compressor);
+                if (body)
+                    merge_sequence(seq, body);
+            } else if (stat instanceof AST_Definitions && declarations_only(stat)
+                || stat instanceof AST_Defun) {
+                statements[n++] = stat;
+            } else {
+                push_seq();
+                statements[n++] = stat;
+            }
+        }
+        push_seq();
+        statements.length = n;
+        if (n != len)
+            CHANGED = true;
+    }
+
+    function to_simple_statement(block, decls) {
+        if (!(block instanceof AST_BlockStatement))
+            return block;
+        var stat = null;
+        for (var i = 0, len = block.body.length; i < len; i++) {
+            var line = block.body[i];
+            if (line instanceof AST_Var && declarations_only(line)) {
+                decls.push(line);
+            } else if (stat || line instanceof AST_DefinitionsLike && !(line instanceof AST_Var)) {
+                return false;
+            } else {
+                stat = line;
+            }
+        }
+        return stat;
+    }
+
+    function sequencesize_2(statements, compressor) {
+        function cons_seq(right) {
+            n--;
+            CHANGED = true;
+            var left = prev.body;
+            return make_sequence(left, [left, right]).transform(compressor);
+        }
+        var n = 0, prev;
+        for (var i = 0; i < statements.length; i++) {
+            var stat = statements[i];
+            if (prev) {
+                if (stat instanceof AST_Exit) {
+                    stat.value = cons_seq(stat.value || make_void_0(stat).transform(compressor));
+                } else if (stat instanceof AST_For) {
+                    if (!(stat.init instanceof AST_DefinitionsLike)) {
+                        const abort = walk(prev.body, node => {
+                            if (node instanceof AST_Scope)
+                                return true;
+                            if (node instanceof AST_Binary
+                                && node.operator === "in") {
+                                return walk_abort;
+                            }
+                        });
+                        if (!abort) {
+                            if (stat.init)
+                                stat.init = cons_seq(stat.init);
+                            else {
+                                stat.init = prev.body;
+                                n--;
+                                CHANGED = true;
+                            }
+                        }
+                    }
+                } else if (stat instanceof AST_ForIn) {
+                    if (!(stat.init instanceof AST_DefinitionsLike) || stat.init instanceof AST_Var) {
+                        stat.object = cons_seq(stat.object);
+                    }
+                } else if (stat instanceof AST_If) {
+                    stat.condition = cons_seq(stat.condition);
+                } else if (stat instanceof AST_Switch) {
+                    stat.expression = cons_seq(stat.expression);
+                } else if (stat instanceof AST_With) {
+                    stat.expression = cons_seq(stat.expression);
+                }
+            }
+            if (compressor.option("conditionals") && stat instanceof AST_If) {
+                var decls = [];
+                var body = to_simple_statement(stat.body, decls);
+                var alt = to_simple_statement(stat.alternative, decls);
+                if (body !== false && alt !== false && decls.length > 0) {
+                    var len = decls.length;
+                    decls.push(make_node(AST_If, stat, {
+                        condition: stat.condition,
+                        body: body || make_node(AST_EmptyStatement, stat.body),
+                        alternative: alt
+                    }));
+                    decls.unshift(n, 1);
+                    [].splice.apply(statements, decls);
+                    i += len;
+                    n += len + 1;
+                    prev = null;
+                    CHANGED = true;
+                    continue;
+                }
+            }
+            statements[n++] = stat;
+            prev = stat instanceof AST_SimpleStatement ? stat : null;
+        }
+        statements.length = n;
+    }
+
+    function join_object_assignments(defn, body) {
+        if (!(defn instanceof AST_Definitions))
+            return;
+        var def = defn.definitions[defn.definitions.length - 1];
+        if (!(def.value instanceof AST_Object))
+            return;
+        var exprs;
+        if (body instanceof AST_Assign && !body.logical) {
+            exprs = [body];
+        } else if (body instanceof AST_Sequence) {
+            exprs = body.expressions.slice();
+        }
+        if (!exprs)
+            return;
+        var trimmed = false;
+        do {
+            var node = exprs[0];
+            if (!(node instanceof AST_Assign))
+                break;
+            if (node.operator != "=")
+                break;
+            if (!(node.left instanceof AST_PropAccess))
+                break;
+            var sym = node.left.expression;
+            if (!(sym instanceof AST_SymbolRef))
+                break;
+            if (def.name.name != sym.name)
+                break;
+            if (!node.right.is_constant_expression(nearest_scope))
+                break;
+            var prop = node.left.property;
+            if (prop instanceof AST_Node) {
+                prop = prop.evaluate(compressor);
+            }
+            if (prop instanceof AST_Node)
+                break;
+            prop = "" + prop;
+            var diff = compressor.option("ecma") < 2015
+                && compressor.has_directive("use strict") ? function (node) {
+                    return node.key != prop && (node.key && node.key.name != prop);
+                } : function (node) {
+                    return node.key && node.key.name != prop;
+                };
+            if (!def.value.properties.every(diff))
+                break;
+            var p = def.value.properties.filter(function (p) { return p.key === prop; })[0];
+            if (!p) {
+                def.value.properties.push(make_node(AST_ObjectKeyVal, node, {
+                    key: prop,
+                    value: node.right
+                }));
+            } else {
+                p.value = new AST_Sequence({
+                    start: p.start,
+                    expressions: [p.value.clone(), node.right.clone()],
+                    end: p.end
+                });
+            }
+            exprs.shift();
+            trimmed = true;
+        } while (exprs.length);
+        return trimmed && exprs;
+    }
+
+    function join_consecutive_vars(statements) {
+        var defs;
+        for (var i = 0, j = -1, len = statements.length; i < len; i++) {
+            var stat = statements[i];
+            var prev = statements[j];
+            if (stat instanceof AST_Definitions) {
+                if (prev && prev.TYPE == stat.TYPE) {
+                    prev.definitions = prev.definitions.concat(stat.definitions);
+                    CHANGED = true;
+                } else if (defs && defs.TYPE == stat.TYPE && declarations_only(stat)) {
+                    defs.definitions = defs.definitions.concat(stat.definitions);
+                    CHANGED = true;
+                } else {
+                    statements[++j] = stat;
+                    defs = stat;
+                }
+            } else if (
+                stat instanceof AST_Using
+                && prev instanceof AST_Using
+                && prev.await === stat.await
+            ) {
+                prev.definitions = prev.definitions.concat(stat.definitions);
+            } else if (stat instanceof AST_Exit) {
+                stat.value = extract_object_assignments(stat.value);
+            } else if (stat instanceof AST_For) {
+                var exprs = join_object_assignments(prev, stat.init);
+                if (exprs) {
+                    CHANGED = true;
+                    stat.init = exprs.length ? make_sequence(stat.init, exprs) : null;
+                    statements[++j] = stat;
+                } else if (
+                    prev instanceof AST_Var
+                    && (!stat.init || stat.init.TYPE == prev.TYPE)
+                ) {
+                    if (stat.init) {
+                        prev.definitions = prev.definitions.concat(stat.init.definitions);
+                    }
+                    stat.init = prev;
+                    statements[j] = stat;
+                    CHANGED = true;
+                } else if (
+                    defs instanceof AST_Var
+                    && stat.init instanceof AST_Var
+                    && declarations_only(stat.init)
+                ) {
+                    defs.definitions = defs.definitions.concat(stat.init.definitions);
+                    stat.init = null;
+                    statements[++j] = stat;
+                    CHANGED = true;
+                } else {
+                    statements[++j] = stat;
+                }
+            } else if (stat instanceof AST_ForIn) {
+                stat.object = extract_object_assignments(stat.object);
+            } else if (stat instanceof AST_If) {
+                stat.condition = extract_object_assignments(stat.condition);
+            } else if (stat instanceof AST_SimpleStatement) {
+                var exprs = join_object_assignments(prev, stat.body);
+                if (exprs) {
+                    CHANGED = true;
+                    if (!exprs.length)
+                        continue;
+                    stat.body = make_sequence(stat.body, exprs);
+                }
+                statements[++j] = stat;
+            } else if (stat instanceof AST_Switch) {
+                stat.expression = extract_object_assignments(stat.expression);
+            } else if (stat instanceof AST_With) {
+                stat.expression = extract_object_assignments(stat.expression);
+            } else {
+                statements[++j] = stat;
+            }
+        }
+        statements.length = j + 1;
+
+        function extract_object_assignments(value) {
+            statements[++j] = stat;
+            var exprs = join_object_assignments(prev, value);
+            if (exprs) {
+                CHANGED = true;
+                if (exprs.length) {
+                    return make_sequence(value, exprs);
+                } else if (value instanceof AST_Sequence) {
+                    return value.tail_node().left;
+                } else {
+                    return value.left;
+                }
+            }
+            return value;
+        }
+    }
+}
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+/**
+ * Module that contains the inlining logic.
+ *
+ * @module
+ *
+ * The stars of the show are `inline_into_symbolref` and `inline_into_call`.
+ */
+
+function within_array_or_object_literal(compressor) {
+    var node, level = 0;
+    while (node = compressor.parent(level++)) {
+        if (node instanceof AST_Statement) return false;
+        if (node instanceof AST_Array
+            || node instanceof AST_ObjectKeyVal
+            || node instanceof AST_Object) {
+            return true;
+        }
+    }
+    return false;
+}
+
+function scope_encloses_variables_in_this_scope(scope, pulled_scope) {
+    for (const enclosed of pulled_scope.enclosed) {
+        if (pulled_scope.variables.has(enclosed.name)) {
+            continue;
+        }
+        const looked_up = scope.find_variable(enclosed.name);
+        if (looked_up) {
+            if (looked_up === enclosed) continue;
+            return true;
+        }
+    }
+    return false;
+}
+
+/**
+ * An extra check function for `top_retain` option, compare the length of const identifier
+ * and init value length and return true if init value is longer than identifier. for example:
+ * ```
+ * // top_retain: ["example"]
+ * const example = 100
+ * ```
+ * it will return false because length of "100" is short than identifier "example".
+ */
+function is_const_symbol_short_than_init_value(def, fixed_value) {
+    if (def.orig.length === 1 && fixed_value) {
+        const init_value_length = fixed_value.size();
+        const identifer_length = def.name.length;
+        return init_value_length > identifer_length;
+    }
+    return true;
+}
+
+function inline_into_symbolref(self, compressor) {
+    if (compressor.in_computed_key()) return self;
+
+    const parent = compressor.parent();
+    const def = self.definition();
+    const nearest_scope = compressor.find_scope();
+    let fixed = self.fixed_value();
+    if (
+        compressor.top_retain &&
+        def.global && 
+        compressor.top_retain(def) && 
+        // when identifier is in top_retain option dose not mean we can always inline it.
+        // if identifier name is longer then init value, we can replace it.
+        is_const_symbol_short_than_init_value(def, fixed)
+    ) {
+        // keep it
+        def.fixed = false;
+        def.single_use = false;
+        return self;
+    }
+
+    if (dont_inline_lambda_in_loop(compressor, fixed)) return self;
+
+    let single_use = def.single_use
+        && !(parent instanceof AST_Call
+            && (parent.is_callee_pure(compressor))
+                || has_annotation(parent, _NOINLINE))
+        && !(parent instanceof AST_Export
+            && fixed instanceof AST_Lambda
+            && fixed.name);
+
+    if (single_use && fixed instanceof AST_Node) {
+        single_use =
+            !fixed.has_side_effects(compressor)
+            && !fixed.may_throw(compressor);
+    }
+
+    if (fixed instanceof AST_Class && def.scope !== self.scope) {
+        return self;
+    }
+
+    if (single_use && (fixed instanceof AST_Lambda || fixed instanceof AST_Class)) {
+        if (retain_top_func(fixed, compressor)) {
+            single_use = false;
+        } else if (def.scope !== self.scope
+            && (def.escaped == 1
+                || has_flag(fixed, INLINED)
+                || within_array_or_object_literal(compressor)
+                || !compressor.option("reduce_funcs"))) {
+            single_use = false;
+        } else if (is_recursive_ref(compressor, def)) {
+            single_use = false;
+        } else if (def.scope !== self.scope || def.orig[0] instanceof AST_SymbolFunarg) {
+            single_use = fixed.is_constant_expression(self.scope);
+            if (single_use == "f") {
+                var scope = self.scope;
+                do {
+                    if (scope instanceof AST_Defun || is_func_expr(scope)) {
+                        set_flag(scope, INLINED);
+                    }
+                } while (scope = scope.parent_scope);
+            }
+        }
+    }
+
+    if (single_use && (fixed instanceof AST_Lambda || fixed instanceof AST_Class)) {
+        single_use =
+            def.scope === self.scope
+                && !scope_encloses_variables_in_this_scope(nearest_scope, fixed)
+            || parent instanceof AST_Call
+                && parent.expression === self
+                && !scope_encloses_variables_in_this_scope(nearest_scope, fixed)
+                && !(fixed.name && fixed.name.definition().recursive_refs > 0);
+    }
+
+    if (single_use && fixed) {
+        if (fixed instanceof AST_DefClass) {
+            set_flag(fixed, SQUEEZED);
+            fixed = make_node(AST_ClassExpression, fixed, fixed);
+        }
+        if (fixed instanceof AST_Defun) {
+            set_flag(fixed, SQUEEZED);
+            fixed = make_node(AST_Function, fixed, fixed);
+        }
+        if (def.recursive_refs > 0 && fixed.name instanceof AST_SymbolDefun) {
+            const defun_def = fixed.name.definition();
+            let lambda_def = fixed.variables.get(fixed.name.name);
+            let name = lambda_def && lambda_def.orig[0];
+            if (!(name instanceof AST_SymbolLambda)) {
+                name = make_node(AST_SymbolLambda, fixed.name, fixed.name);
+                name.scope = fixed;
+                fixed.name = name;
+                lambda_def = fixed.def_function(name);
+            }
+            walk(fixed, node => {
+                if (node instanceof AST_SymbolRef && node.definition() === defun_def) {
+                    node.thedef = lambda_def;
+                    lambda_def.references.push(node);
+                }
+            });
+        }
+        if (
+            (fixed instanceof AST_Lambda || fixed instanceof AST_Class)
+            && fixed.parent_scope !== nearest_scope
+        ) {
+            fixed = fixed.clone(true, compressor.get_toplevel());
+
+            nearest_scope.add_child_scope(fixed);
+        }
+        return fixed.optimize(compressor);
+    }
+
+    // multiple uses
+    if (fixed) {
+        let replace;
+
+        if (fixed instanceof AST_This) {
+            if (!(def.orig[0] instanceof AST_SymbolFunarg)
+                && def.references.every((ref) =>
+                    def.scope === ref.scope
+                )) {
+                replace = fixed;
+            }
+        } else {
+            var ev = fixed.evaluate(compressor);
+            if (
+                ev !== fixed
+                && (compressor.option("unsafe_regexp") || !(ev instanceof RegExp))
+            ) {
+                replace = make_node_from_constant(ev, fixed);
+            }
+        }
+
+        if (replace) {
+            const name_length = self.size(compressor);
+            const replace_size = replace.size(compressor);
+
+            let overhead = 0;
+            if (compressor.option("unused") && !compressor.exposed(def)) {
+                overhead =
+                    (name_length + 2 + fixed.size(compressor)) /
+                    (def.references.length - def.assignments);
+            }
+
+            if (replace_size <= name_length + overhead) {
+                return replace;
+            }
+        }
+    }
+
+    return self;
+}
+
+function inline_into_call(self, compressor) {
+    if (compressor.in_computed_key()) return self;
+
+    var exp = self.expression;
+    var fn = exp;
+    var simple_args = self.args.every((arg) => !(arg instanceof AST_Expansion));
+
+    if (compressor.option("reduce_vars")
+        && fn instanceof AST_SymbolRef
+        && !has_annotation(self, _NOINLINE)
+    ) {
+        const fixed = fn.fixed_value();
+
+        if (
+            retain_top_func(fixed, compressor)
+            || !compressor.toplevel.funcs && exp.definition().global
+        ) {
+            return self;
+        }
+
+        fn = fixed;
+    }
+
+    if (
+        dont_inline_lambda_in_loop(compressor, fn)
+        && !has_annotation(self, _INLINE)
+    ) return self;
+
+    var is_func = fn instanceof AST_Lambda;
+
+    var stat = is_func && fn.body[0];
+    var is_regular_func = is_func && !fn.is_generator && !fn.async;
+    var can_inline = is_regular_func && compressor.option("inline") && !self.is_callee_pure(compressor);
+    if (can_inline && stat instanceof AST_Return) {
+        let returned = stat.value;
+        if (!returned || returned.is_constant_expression()) {
+            if (returned) {
+                returned = returned.clone(true);
+            } else {
+                returned = make_void_0(self);
+            }
+            const args = self.args.concat(returned);
+            return make_sequence(self, args).optimize(compressor);
+        }
+
+        // optimize identity function
+        if (
+            fn.argnames.length === 1
+            && (fn.argnames[0] instanceof AST_SymbolFunarg)
+            && self.args.length < 2
+            && !(self.args[0] instanceof AST_Expansion)
+            && returned instanceof AST_SymbolRef
+            && returned.name === fn.argnames[0].name
+        ) {
+            const replacement =
+                (self.args[0] || make_void_0()).optimize(compressor);
+
+            let parent;
+            if (
+                replacement instanceof AST_PropAccess
+                && (parent = compressor.parent()) instanceof AST_Call
+                && parent.expression === self
+            ) {
+                // identity function was being used to remove `this`, like in
+                //
+                // id(bag.no_this)(...)
+                //
+                // Replace with a larger but more effish (0, bag.no_this) wrapper.
+
+                return make_sequence(self, [
+                    make_node(AST_Number, self, { value: 0 }),
+                    replacement
+                ]);
+            }
+            // replace call with first argument or undefined if none passed
+            return replacement;
+        }
+    }
+
+    if (can_inline) {
+        var scope, in_loop, level = -1;
+        let def;
+        let returned_value;
+        let nearest_scope;
+        if (simple_args
+            && !fn.uses_arguments
+            && !(compressor.parent() instanceof AST_Class)
+            && !(fn.name && fn instanceof AST_Function)
+            && (returned_value = can_flatten_body(stat))
+            && (exp === fn
+                || has_annotation(self, _INLINE)
+                || compressor.option("unused")
+                    && (def = exp.definition()).references.length == 1
+                    && !is_recursive_ref(compressor, def)
+                    && fn.is_constant_expression(exp.scope))
+            && !has_annotation(self, _PURE | _NOINLINE)
+            && !fn.contains_this()
+            && can_inject_symbols()
+            && (nearest_scope = compressor.find_scope())
+            && !scope_encloses_variables_in_this_scope(nearest_scope, fn)
+            && !(function in_default_assign() {
+                    // Due to the fact function parameters have their own scope
+                    // which can't use `var something` in the function body within,
+                    // we simply don't inline into DefaultAssign.
+                    let i = 0;
+                    let p;
+                    while ((p = compressor.parent(i++))) {
+                        if (p instanceof AST_DefaultAssign) return true;
+                        if (p instanceof AST_Block) break;
+                    }
+                    return false;
+                })()
+            && !(scope instanceof AST_Class)
+        ) {
+            set_flag(fn, SQUEEZED);
+            nearest_scope.add_child_scope(fn);
+            return make_sequence(self, flatten_fn(returned_value)).optimize(compressor);
+        }
+    }
+
+    if (can_inline && has_annotation(self, _INLINE)) {
+        set_flag(fn, SQUEEZED);
+        fn = make_node(fn.CTOR === AST_Defun ? AST_Function : fn.CTOR, fn, fn);
+        fn = fn.clone(true);
+        fn.figure_out_scope({}, {
+            parent_scope: compressor.find_scope(),
+            toplevel: compressor.get_toplevel()
+        });
+
+        return make_node(AST_Call, self, {
+            expression: fn,
+            args: self.args,
+        }).optimize(compressor);
+    }
+
+    const can_drop_this_call = is_regular_func && compressor.option("side_effects") && fn.body.every(is_empty);
+    if (can_drop_this_call) {
+        var args = self.args.concat(make_void_0(self));
+        return make_sequence(self, args).optimize(compressor);
+    }
+
+    if (compressor.option("negate_iife")
+        && compressor.parent() instanceof AST_SimpleStatement
+        && is_iife_call(self)) {
+        return self.negate(compressor, true);
+    }
+
+    var ev = self.evaluate(compressor);
+    if (ev !== self) {
+        ev = make_node_from_constant(ev, self).optimize(compressor);
+        return best_of(compressor, ev, self);
+    }
+
+    return self;
+
+    function return_value(stat) {
+        if (!stat) return make_void_0(self);
+        if (stat instanceof AST_Return) {
+            if (!stat.value) return make_void_0(self);
+            return stat.value.clone(true);
+        }
+        if (stat instanceof AST_SimpleStatement) {
+            return make_node(AST_UnaryPrefix, stat, {
+                operator: "void",
+                expression: stat.body.clone(true)
+            });
+        }
+    }
+
+    function can_flatten_body(stat) {
+        var body = fn.body;
+        var len = body.length;
+        if (compressor.option("inline") < 3) {
+            return len == 1 && return_value(stat);
+        }
+        stat = null;
+        for (var i = 0; i < len; i++) {
+            var line = body[i];
+            if (line instanceof AST_Var) {
+                if (stat && !line.definitions.every((var_def) =>
+                    !var_def.value
+                )) {
+                    return false;
+                }
+            } else if (stat) {
+                return false;
+            } else if (!(line instanceof AST_EmptyStatement)) {
+                stat = line;
+            }
+        }
+        return return_value(stat);
+    }
+
+    function can_inject_args(block_scoped, safe_to_inject) {
+        for (var i = 0, len = fn.argnames.length; i < len; i++) {
+            var arg = fn.argnames[i];
+            if (arg instanceof AST_DefaultAssign) {
+                if (has_flag(arg.left, UNUSED)) continue;
+                return false;
+            }
+            if (arg instanceof AST_Destructuring) return false;
+            if (arg instanceof AST_Expansion) {
+                if (has_flag(arg.expression, UNUSED)) continue;
+                return false;
+            }
+            if (has_flag(arg, UNUSED)) continue;
+            if (!safe_to_inject
+                || block_scoped.has(arg.name)
+                || identifier_atom.has(arg.name)
+                || scope.conflicting_def(arg.name)) {
+                return false;
+            }
+            if (in_loop) in_loop.push(arg.definition());
+        }
+        return true;
+    }
+
+    function can_inject_vars(block_scoped, safe_to_inject) {
+        var len = fn.body.length;
+        for (var i = 0; i < len; i++) {
+            var stat = fn.body[i];
+            if (!(stat instanceof AST_Var)) continue;
+            if (!safe_to_inject) return false;
+            for (var j = stat.definitions.length; --j >= 0;) {
+                var name = stat.definitions[j].name;
+                if (name instanceof AST_Destructuring
+                    || block_scoped.has(name.name)
+                    || identifier_atom.has(name.name)
+                    || scope.conflicting_def(name.name)) {
+                    return false;
+                }
+                if (in_loop) in_loop.push(name.definition());
+            }
+        }
+        return true;
+    }
+
+    function can_inject_symbols() {
+        var block_scoped = new Set();
+        do {
+            scope = compressor.parent(++level);
+            if (scope.is_block_scope() && scope.block_scope) {
+                // TODO this is sometimes undefined during compression.
+                // But it should always have a value!
+                scope.block_scope.variables.forEach(function (variable) {
+                    block_scoped.add(variable.name);
+                });
+            }
+            if (scope instanceof AST_Catch) {
+                // TODO can we delete? AST_Catch is a block scope.
+                if (scope.argname) {
+                    block_scoped.add(scope.argname.name);
+                }
+            } else if (scope instanceof AST_IterationStatement) {
+                in_loop = [];
+            } else if (scope instanceof AST_SymbolRef) {
+                if (scope.fixed_value() instanceof AST_Scope) return false;
+            }
+        } while (!(scope instanceof AST_Scope));
+
+        var safe_to_inject = !(scope instanceof AST_Toplevel) || compressor.toplevel.vars;
+        var inline = compressor.option("inline");
+        if (!can_inject_vars(block_scoped, inline >= 3 && safe_to_inject)) return false;
+        if (!can_inject_args(block_scoped, inline >= 2 && safe_to_inject)) return false;
+        return !in_loop || in_loop.length == 0 || !is_reachable(fn, in_loop);
+    }
+
+    function append_var(decls, expressions, name, value) {
+        var def = name.definition();
+
+        // Name already exists, only when a function argument had the same name
+        const already_appended = scope.variables.has(name.name);
+        if (!already_appended) {
+            scope.variables.set(name.name, def);
+            scope.enclosed.push(def);
+            decls.push(make_node(AST_VarDef, name, {
+                name: name,
+                value: null
+            }));
+        }
+
+        var sym = make_node(AST_SymbolRef, name, name);
+        def.references.push(sym);
+        if (value) expressions.push(make_node(AST_Assign, self, {
+            operator: "=",
+            logical: false,
+            left: sym,
+            right: value.clone()
+        }));
+    }
+
+    function flatten_args(decls, expressions) {
+        var len = fn.argnames.length;
+        for (var i = self.args.length; --i >= len;) {
+            expressions.push(self.args[i]);
+        }
+        for (i = len; --i >= 0;) {
+            var name = fn.argnames[i];
+            var value = self.args[i];
+            if (has_flag(name, UNUSED) || !name.name || scope.conflicting_def(name.name)) {
+                if (value) expressions.push(value);
+            } else {
+                var symbol = make_node(AST_SymbolVar, name, name);
+                name.definition().orig.push(symbol);
+                if (!value && in_loop) value = make_void_0(self);
+                append_var(decls, expressions, symbol, value);
+            }
+        }
+        decls.reverse();
+        expressions.reverse();
+    }
+
+    function flatten_vars(decls, expressions) {
+        var pos = expressions.length;
+        for (var i = 0, lines = fn.body.length; i < lines; i++) {
+            var stat = fn.body[i];
+            if (!(stat instanceof AST_Var)) continue;
+            for (var j = 0, defs = stat.definitions.length; j < defs; j++) {
+                var var_def = stat.definitions[j];
+                var name = var_def.name;
+                append_var(decls, expressions, name, var_def.value);
+                if (in_loop && fn.argnames.every((argname) =>
+                    argname.name != name.name
+                )) {
+                    var def = fn.variables.get(name.name);
+                    var sym = make_node(AST_SymbolRef, name, name);
+                    def.references.push(sym);
+                    expressions.splice(pos++, 0, make_node(AST_Assign, var_def, {
+                        operator: "=",
+                        logical: false,
+                        left: sym,
+                        right: make_void_0(name),
+                    }));
+                }
+            }
+        }
+    }
+
+    function flatten_fn(returned_value) {
+        var decls = [];
+        var expressions = [];
+        flatten_args(decls, expressions);
+        flatten_vars(decls, expressions);
+        expressions.push(returned_value);
+
+        if (decls.length) {
+            const i = scope.body.indexOf(compressor.parent(level - 1)) + 1;
+            scope.body.splice(i, 0, make_node(AST_Var, fn, {
+                definitions: decls
+            }));
+        }
+
+        return expressions.map(exp => exp.clone(true));
+    }
+}
+
+/** prevent inlining functions into loops, for performance reasons */
+function dont_inline_lambda_in_loop(compressor, maybe_lambda) {
+    return (
+        (maybe_lambda instanceof AST_Lambda || maybe_lambda instanceof AST_Class)
+        && !!compressor.is_within_loop()
+    );
+}
+
+(function(def_find_defs) {
+    function to_node(value, orig) {
+        if (value instanceof AST_Node) {
+            if (!(value instanceof AST_Constant)) {
+                // Value may be a function, an array including functions and even a complex assign / block expression,
+                // so it should never be shared in different places.
+                // Otherwise wrong information may be used in the compression phase
+                value = value.clone(true);
+            }
+            return make_node(value.CTOR, orig, value);
+        }
+        if (Array.isArray(value)) return make_node(AST_Array, orig, {
+            elements: value.map(function(value) {
+                return to_node(value, orig);
+            })
+        });
+        if (value && typeof value == "object") {
+            var props = [];
+            for (var key in value) if (HOP(value, key)) {
+                props.push(make_node(AST_ObjectKeyVal, orig, {
+                    key: key,
+                    value: to_node(value[key], orig)
+                }));
+            }
+            return make_node(AST_Object, orig, {
+                properties: props
+            });
+        }
+        return make_node_from_constant(value, orig);
+    }
+
+    AST_Toplevel.DEFMETHOD("resolve_defines", function(compressor) {
+        if (!compressor.option("global_defs")) return this;
+        this.figure_out_scope({ ie8: compressor.option("ie8") });
+        return this.transform(new TreeTransformer(function(node) {
+            var def = node._find_defs(compressor, "");
+            if (!def) return;
+            var level = 0, child = node, parent;
+            while (parent = this.parent(level++)) {
+                if (!(parent instanceof AST_PropAccess)) break;
+                if (parent.expression !== child) break;
+                child = parent;
+            }
+            if (is_lhs(child, parent)) {
+                return;
+            }
+            return def;
+        }));
+    });
+    def_find_defs(AST_Node, noop);
+    def_find_defs(AST_Chain, function(compressor, suffix) {
+        return this.expression._find_defs(compressor, suffix);
+    });
+    def_find_defs(AST_Dot, function(compressor, suffix) {
+        return this.expression._find_defs(compressor, "." + this.property + suffix);
+    });
+    def_find_defs(AST_SymbolDeclaration, function() {
+        if (!this.global()) return;
+    });
+    def_find_defs(AST_SymbolRef, function(compressor, suffix) {
+        if (!this.global()) return;
+        var defines = compressor.option("global_defs");
+        var name = this.name + suffix;
+        if (HOP(defines, name)) return to_node(defines[name], this);
+    });
+    def_find_defs(AST_ImportMeta, function(compressor, suffix) {
+        var defines = compressor.option("global_defs");
+        var name = "import.meta" + suffix;
+        if (HOP(defines, name)) return to_node(defines[name], this);
+    });
+})(function(node, func) {
+    node.DEFMETHOD("_find_defs", func);
+});
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+class Compressor extends TreeWalker {
+    constructor(options, { false_by_default = false, mangle_options = false }) {
+        super();
+        if (options.defaults !== undefined && !options.defaults) false_by_default = true;
+        this.options = defaults(options, {
+            arguments     : false,
+            arrows        : !false_by_default,
+            booleans      : !false_by_default,
+            booleans_as_integers : false,
+            collapse_vars : !false_by_default,
+            comparisons   : !false_by_default,
+            computed_props: !false_by_default,
+            conditionals  : !false_by_default,
+            dead_code     : !false_by_default,
+            defaults      : true,
+            directives    : !false_by_default,
+            drop_console  : false,
+            drop_debugger : !false_by_default,
+            ecma          : 5,
+            builtins_ecma : 5,
+            builtins_pure : false,
+            evaluate      : !false_by_default,
+            expression    : false,
+            global_defs   : false,
+            hoist_funs    : false,
+            hoist_props   : !false_by_default,
+            hoist_vars    : false,
+            ie8           : false,
+            if_return     : !false_by_default,
+            inline        : !false_by_default,
+            join_vars     : !false_by_default,
+            keep_classnames: false,
+            keep_fargs    : true,
+            keep_fnames   : false,
+            keep_infinity : false,
+            lhs_constants : !false_by_default,
+            loops         : !false_by_default,
+            module        : false,
+            negate_iife   : !false_by_default,
+            passes        : 1,
+            properties    : !false_by_default,
+            pure_getters  : !false_by_default && "strict",
+            pure_funcs    : null,
+            pure_new      : false,
+            reduce_funcs  : !false_by_default,
+            reduce_vars   : !false_by_default,
+            sequences     : !false_by_default,
+            side_effects  : !false_by_default,
+            switches      : !false_by_default,
+            top_retain    : null,
+            toplevel      : !!(options && options["top_retain"]),
+            typeofs       : !false_by_default,
+            unsafe        : false,
+            unsafe_arrows : false,
+            unsafe_comps  : false,
+            unsafe_Function: false,
+            unsafe_math   : false,
+            unsafe_symbols: false,
+            unsafe_methods: false,
+            unsafe_proto  : false,
+            unsafe_regexp : false,
+            unsafe_undefined: false,
+            unused        : !false_by_default,
+            warnings      : false  // legacy
+        }, true);
+        var global_defs = this.options["global_defs"];
+        if (typeof global_defs == "object") for (var key in global_defs) {
+            if (key[0] === "@" && HOP(global_defs, key)) {
+                global_defs[key.slice(1)] = parse(global_defs[key], {
+                    expression: true
+                });
+            }
+        }
+        if (this.options["inline"] === true) this.options["inline"] = 3;
+        var pure_funcs = this.options["pure_funcs"];
+        if (typeof pure_funcs == "function") {
+            this.pure_funcs = pure_funcs;
+        } else {
+            this.pure_funcs = pure_funcs ? function(node) {
+                return !pure_funcs.includes(node.expression.print_to_string());
+            } : return_true;
+        }
+        var top_retain = this.options["top_retain"];
+        if (top_retain instanceof RegExp) {
+            this.top_retain = function(def) {
+                return top_retain.test(def.name);
+            };
+        } else if (typeof top_retain == "function") {
+            this.top_retain = top_retain;
+        } else if (top_retain) {
+            if (typeof top_retain == "string") {
+                top_retain = top_retain.split(/,/);
+            }
+            this.top_retain = function(def) {
+                return top_retain.includes(def.name);
+            };
+        }
+        if (this.options["module"]) {
+            this.directives["use strict"] = true;
+            this.options["toplevel"] = true;
+        }
+        var toplevel = this.options["toplevel"];
+        this.toplevel = typeof toplevel == "string" ? {
+            funcs: /funcs/.test(toplevel),
+            vars: /vars/.test(toplevel)
+        } : {
+            funcs: toplevel,
+            vars: toplevel
+        };
+        var sequences = this.options["sequences"];
+        this.sequences_limit = sequences == 1 ? 800 : sequences | 0;
+        this.evaluated_regexps = new Map();
+        this._toplevel = undefined;
+        this._mangle_options = mangle_options
+            ? format_mangler_options(mangle_options)
+            : mangle_options;
+
+        this.pure_access_globals = pure_access_globals(this);
+        this.is_pure_native_fn = is_pure_native_fn(this);
+        this.is_pure_native_method = is_pure_native_method(this);
+        this.is_pure_native_static_fn = is_pure_native_static_fn(this);
+        this.is_pure_native_static_property = is_pure_native_static_property(this);
+    }
+
+    mangle_options() {
+        var nth_identifier = this._mangle_options && this._mangle_options.nth_identifier || base54;
+        var module = this._mangle_options && this._mangle_options.module || this.option("module");
+        return { ie8: this.option("ie8"), nth_identifier, module };
+    }
+
+    option(key) {
+        return this.options[key];
+    }
+
+    exposed(def) {
+        if (def.export) return true;
+        if (def.global) for (var i = 0, len = def.orig.length; i < len; i++)
+            if (!this.toplevel[def.orig[i] instanceof AST_SymbolDefun ? "funcs" : "vars"])
+                return true;
+        return false;
+    }
+
+    in_boolean_context() {
+        if (!this.option("booleans")) return false;
+        var self = this.self();
+        for (var i = 0, p; p = this.parent(i); i++) {
+            if (p instanceof AST_SimpleStatement
+                || p instanceof AST_Conditional && p.condition === self
+                || p instanceof AST_DWLoop && p.condition === self
+                || p instanceof AST_For && p.condition === self
+                || p instanceof AST_If && p.condition === self
+                || p instanceof AST_UnaryPrefix && p.operator == "!" && p.expression === self) {
+                return true;
+            }
+            if (
+                p instanceof AST_Binary
+                    && (
+                        p.operator == "&&"
+                        || p.operator == "||"
+                        || p.operator == "??"
+                    )
+                || p instanceof AST_Conditional
+                || p.tail_node() === self
+            ) {
+                self = p;
+            } else {
+                return false;
+            }
+        }
+    }
+
+    /** True if compressor.self()'s result will be turned into a 32-bit integer.
+     * ex:
+     * ~{expr}
+     * (1, 2, {expr}) | 0
+     **/
+    in_32_bit_context(other_operand_must_be_number) {
+        if (!this.option("evaluate")) return false;
+        var self = this.self();
+        for (var i = 0, p; p = this.parent(i); i++) {
+            if (p instanceof AST_Binary && bitwise_binop.has(p.operator)) {
+                if (other_operand_must_be_number) {
+                    return (self === p.left ? p.right : p.left).is_number(this);
+                } else {
+                    return true;
+                }
+            }
+            if (p instanceof AST_UnaryPrefix) {
+                return p.operator === "~";
+            }
+            if (
+                p instanceof AST_Binary
+                    && (
+                        // Don't talk about p.left. Can change branch taken
+                        p.operator == "&&" && p.right === self
+                        || p.operator == "||" && p.right === self
+                        || p.operator == "??" && p.right === self
+                    )
+                || p instanceof AST_Conditional && p.condition !== self
+                || p.tail_node() === self
+            ) {
+                self = p;
+            } else {
+                return false;
+            }
+        }
+    }
+
+    in_computed_key() {
+        if (!this.option("evaluate")) return false;
+        var self = this.self();
+        for (var i = 0, p; p = this.parent(i); i++) {
+            if (p instanceof AST_ObjectProperty && p.key === self) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    get_toplevel() {
+        return this._toplevel;
+    }
+
+    compress(toplevel) {
+        toplevel = toplevel.resolve_defines(this);
+        this._toplevel = toplevel;
+        if (this.option("expression")) {
+            this._toplevel.process_expression(true);
+        }
+        var passes = +this.options.passes || 1;
+        var min_count = 1 / 0;
+        var stopping = false;
+        var mangle = this.mangle_options();
+        for (var pass = 0; pass < passes; pass++) {
+            this._toplevel.figure_out_scope(mangle);
+            if (pass === 0 && this.option("drop_console")) {
+                // must be run before reduce_vars and compress pass
+                this._toplevel = this._toplevel.drop_console(this.option("drop_console"));
+            }
+            if (pass > 0 || this.option("reduce_vars")) {
+                this._toplevel.reset_opt_flags(this);
+            }
+            this._toplevel = this._toplevel.transform(this);
+            if (passes > 1) {
+                let count = 0;
+                walk(this._toplevel, () => { count++; });
+                if (count < min_count) {
+                    min_count = count;
+                    stopping = false;
+                } else if (stopping) {
+                    break;
+                } else {
+                    stopping = true;
+                }
+            }
+        }
+        if (this.option("expression")) {
+            this._toplevel.process_expression(false);
+        }
+        toplevel = this._toplevel;
+        this._toplevel = undefined;
+        return toplevel;
+    }
+
+    before(node, descend) {
+        if (has_flag(node, SQUEEZED)) return node;
+        var was_scope = false;
+        if (node instanceof AST_Scope) {
+            node = node.hoist_properties(this);
+            node = node.hoist_declarations(this);
+            was_scope = true;
+        }
+        // Before https://github.com/mishoo/UglifyJS2/pull/1602 AST_Node.optimize()
+        // would call AST_Node.transform() if a different instance of AST_Node is
+        // produced after def_optimize().
+        // This corrupts TreeWalker.stack, which cause AST look-ups to malfunction.
+        // Migrate and defer all children's AST_Node.transform() to below, which
+        // will now happen after this parent AST_Node has been properly substituted
+        // thus gives a consistent AST snapshot.
+        descend(node, this);
+        // Existing code relies on how AST_Node.optimize() worked, and omitting the
+        // following replacement call would result in degraded efficiency of both
+        // output and performance.
+        descend(node, this);
+        var opt = node.optimize(this);
+        if (was_scope && opt instanceof AST_Scope) {
+            opt.drop_unused(this);
+            descend(opt, this);
+        }
+        if (opt === node) set_flag(opt, SQUEEZED);
+        return opt;
+    }
+
+    /** Alternative to plain is_lhs() which doesn't work within .optimize() */
+    is_lhs() {
+        const self = this.stack[this.stack.length - 1];
+        const parent = this.stack[this.stack.length - 2];
+        return is_lhs(self, parent);
+    }
+}
+
+
+function def_optimize(node, optimizer) {
+    node.DEFMETHOD("optimize", function(compressor) {
+        var self = this;
+        if (has_flag(self, OPTIMIZED)) return self;
+        if (compressor.has_directive("use asm")) return self;
+        var opt = optimizer(self, compressor);
+        set_flag(opt, OPTIMIZED);
+        return opt;
+    });
+}
+
+def_optimize(AST_Node, function(self) {
+    return self;
+});
+
+AST_Toplevel.DEFMETHOD("drop_console", function(options) {
+    const isArray = Array.isArray(options);
+    const tt = new TreeTransformer(function(self) {
+        if (self.TYPE !== "Call") {
+            return;
+        }
+
+        var exp = self.expression;
+
+        if (!(exp instanceof AST_PropAccess)) {
+            return;
+        }
+
+        var name = exp.expression;
+        var property = exp.property;
+        var depth = 2;
+        while (name.expression) {
+            property = name.property;
+            name = name.expression;
+            depth++;
+        }
+
+        if (isArray && !options.includes(property)) {
+            return;
+        }
+
+        if (is_undeclared_ref(name) && name.name == "console") {
+            if (
+                depth === 3
+                && !["call", "apply"].includes(exp.property)
+                && is_used_in_expression(tt)
+            ) {
+                // a (used) call to Function.prototype methods (eg: console.log.bind(console))
+                // but not .call and .apply which would also return undefined.
+                exp.expression = make_empty_function(self);
+                set_flag(exp.expression, SQUEEZED);
+                self.args = [];
+            } else {
+                return make_void_0(self);
+            }
+        }
+    });
+
+    return this.transform(tt);
+});
+
+AST_Node.DEFMETHOD("equivalent_to", function(node) {
+    return equivalent_to(this, node);
+});
+
+AST_Scope.DEFMETHOD("process_expression", function(insert, compressor) {
+    var self = this;
+    var tt = new TreeTransformer(function(node) {
+        if (insert && node instanceof AST_SimpleStatement) {
+            return make_node(AST_Return, node, {
+                value: node.body
+            });
+        }
+        if (!insert && node instanceof AST_Return) {
+            if (compressor) {
+                var value = node.value && node.value.drop_side_effect_free(compressor, true);
+                return value
+                    ? make_node(AST_SimpleStatement, node, { body: value })
+                    : make_node(AST_EmptyStatement, node);
+            }
+            return make_node(AST_SimpleStatement, node, {
+                body: node.value || make_void_0(node)
+            });
+        }
+        if (node instanceof AST_Class || node instanceof AST_Lambda && node !== self) {
+            return node;
+        }
+        if (node instanceof AST_Block) {
+            var index = node.body.length - 1;
+            if (index >= 0) {
+                node.body[index] = node.body[index].transform(tt);
+            }
+        } else if (node instanceof AST_If) {
+            node.body = node.body.transform(tt);
+            if (node.alternative) {
+                node.alternative = node.alternative.transform(tt);
+            }
+        } else if (node instanceof AST_With) {
+            node.body = node.body.transform(tt);
+        }
+        return node;
+    });
+    self.transform(tt);
+});
+
+AST_Toplevel.DEFMETHOD("reset_opt_flags", function(compressor) {
+    const self = this;
+    const reduce_vars = compressor.option("reduce_vars");
+
+    const preparation = new TreeWalker(function(node, descend) {
+        clear_flag(node, CLEAR_BETWEEN_PASSES);
+        if (reduce_vars) {
+            if (compressor.top_retain
+                && node instanceof AST_Defun  // Only functions are retained
+                && preparation.parent() === self
+            ) {
+                set_flag(node, TOP);
+            }
+            return node.reduce_vars(preparation, descend, compressor);
+        }
+    });
+    // Stack of look-up tables to keep track of whether a `SymbolDef` has been
+    // properly assigned before use:
+    // - `push()` & `pop()` when visiting conditional branches
+    preparation.safe_ids = Object.create(null);
+    preparation.in_loop = null;
+    preparation.loop_ids = new Map();
+    preparation.defs_to_safe_ids = new Map();
+    self.walk(preparation);
+});
+
+AST_Symbol.DEFMETHOD("fixed_value", function() {
+    var fixed = this.thedef.fixed;
+    if (!fixed || fixed instanceof AST_Node) return fixed;
+    return fixed();
+});
+
+AST_SymbolRef.DEFMETHOD("is_immutable", function() {
+    var orig = this.definition().orig;
+    return orig.length == 1 && orig[0] instanceof AST_SymbolLambda;
+});
+
+function find_variable(compressor, name) {
+    var scope, i = 0;
+    while (scope = compressor.parent(i++)) {
+        if (scope instanceof AST_Scope) break;
+        if (scope instanceof AST_Catch && scope.argname) {
+            scope = scope.argname.definition().scope;
+            break;
+        }
+    }
+    return scope.find_variable(name);
+}
+
+AST_SymbolRef.DEFMETHOD("is_declared", function(compressor) {
+    return !this.definition().undeclared
+        || (compressor.option("unsafe") || compressor.option("builtins_pure")) && compressor.pure_access_globals(this.name);
+});
+
+/* -----[ optimizers ]----- */
+
+var directives = new Set(["use asm", "use strict"]);
+def_optimize(AST_Directive, function(self, compressor) {
+    if (compressor.option("directives")
+        && (!directives.has(self.value) || compressor.has_directive(self.value) !== self)) {
+        return make_node(AST_EmptyStatement, self);
+    }
+    return self;
+});
+
+def_optimize(AST_Debugger, function(self, compressor) {
+    if (compressor.option("drop_debugger"))
+        return make_node(AST_EmptyStatement, self);
+    return self;
+});
+
+def_optimize(AST_LabeledStatement, function(self, compressor) {
+    if (self.body instanceof AST_Break
+        && compressor.loopcontrol_target(self.body) === self.body) {
+        return make_node(AST_EmptyStatement, self);
+    }
+    return self.label.references.length == 0 ? self.body : self;
+});
+
+def_optimize(AST_Block, function(self, compressor) {
+    tighten_body(self.body, compressor);
+    return self;
+});
+
+function can_be_extracted_from_if_block(node) {
+    return !(
+        node instanceof AST_Const
+        || node instanceof AST_Let
+        || node instanceof AST_Using
+        || node instanceof AST_Class
+    );
+}
+
+def_optimize(AST_BlockStatement, function(self, compressor) {
+    tighten_body(self.body, compressor);
+    switch (self.body.length) {
+      case 1:
+        if (!compressor.has_directive("use strict")
+            && compressor.parent() instanceof AST_If
+            && can_be_extracted_from_if_block(self.body[0])
+            || can_be_evicted_from_block(self.body[0])) {
+            return self.body[0];
+        }
+        break;
+      case 0: return make_node(AST_EmptyStatement, self);
+    }
+    return self;
+});
+
+function opt_AST_Lambda(self, compressor) {
+    tighten_body(self.body, compressor);
+    if (compressor.option("side_effects")
+        && self.body.length == 1
+        && self.body[0] === compressor.has_directive("use strict")) {
+        self.body.length = 0;
+    }
+    return self;
+}
+def_optimize(AST_Lambda, opt_AST_Lambda);
+
+AST_Scope.DEFMETHOD("hoist_declarations", function(compressor) {
+    var self = this;
+    if (compressor.has_directive("use asm")) return self;
+
+    var hoist_funs = compressor.option("hoist_funs");
+    var hoist_vars = compressor.option("hoist_vars");
+
+    if (hoist_funs || hoist_vars) {
+        var dirs = [];
+        var hoisted = [];
+        var vars = new Map(), vars_found = 0, var_decl = 0;
+        // let's count var_decl first, we seem to waste a lot of
+        // space if we hoist `var` when there's only one.
+        walk(self, node => {
+            if (node instanceof AST_Scope && node !== self)
+                return true;
+            if (node instanceof AST_Var) {
+                ++var_decl;
+                return true;
+            }
+        });
+        hoist_vars = hoist_vars && var_decl > 1;
+        var tt = new TreeTransformer(
+            function before(node) {
+                if (node !== self) {
+                    if (node instanceof AST_Directive) {
+                        dirs.push(node);
+                        return make_node(AST_EmptyStatement, node);
+                    }
+                    if (hoist_funs && node instanceof AST_Defun
+                        && !(tt.parent() instanceof AST_Export)
+                        && tt.parent() === self) {
+                        hoisted.push(node);
+                        return make_node(AST_EmptyStatement, node);
+                    }
+                    if (
+                        hoist_vars
+                        && node instanceof AST_Var
+                        && !node.definitions.some(def => def.name instanceof AST_Destructuring)
+                    ) {
+                        node.definitions.forEach(function(def) {
+                            vars.set(def.name.name, def);
+                            ++vars_found;
+                        });
+                        var seq = node.to_assignments(compressor);
+                        var p = tt.parent();
+                        if (p instanceof AST_ForIn && p.init === node) {
+                            if (seq == null) {
+                                var def = node.definitions[0].name;
+                                return make_node(AST_SymbolRef, def, def);
+                            }
+                            return seq;
+                        }
+                        if (p instanceof AST_For && p.init === node) {
+                            return seq;
+                        }
+                        if (!seq) return make_node(AST_EmptyStatement, node);
+                        return make_node(AST_SimpleStatement, node, {
+                            body: seq
+                        });
+                    }
+                    if (node instanceof AST_Scope)
+                        return node; // to avoid descending in nested scopes
+                }
+            }
+        );
+        self = self.transform(tt);
+        if (vars_found > 0) {
+            // collect only vars which don't show up in self's arguments list
+            var defs = [];
+            const is_lambda = self instanceof AST_Lambda;
+            const args_as_names = is_lambda ? self.args_as_names() : null;
+            vars.forEach((def, name) => {
+                if (is_lambda && args_as_names.some((x) => x.name === def.name.name)) {
+                    vars.delete(name);
+                } else {
+                    def = def.clone();
+                    def.value = null;
+                    defs.push(def);
+                    vars.set(name, def);
+                }
+            });
+            if (defs.length > 0) {
+                // try to merge in assignments
+                for (var i = 0; i < self.body.length;) {
+                    if (self.body[i] instanceof AST_SimpleStatement) {
+                        var expr = self.body[i].body, sym, assign;
+                        if (expr instanceof AST_Assign
+                            && expr.operator == "="
+                            && (sym = expr.left) instanceof AST_Symbol
+                            && vars.has(sym.name)
+                        ) {
+                            var def = vars.get(sym.name);
+                            if (def.value) break;
+                            def.value = expr.right;
+                            remove(defs, def);
+                            defs.push(def);
+                            self.body.splice(i, 1);
+                            continue;
+                        }
+                        if (expr instanceof AST_Sequence
+                            && (assign = expr.expressions[0]) instanceof AST_Assign
+                            && assign.operator == "="
+                            && (sym = assign.left) instanceof AST_Symbol
+                            && vars.has(sym.name)
+                        ) {
+                            var def = vars.get(sym.name);
+                            if (def.value) break;
+                            def.value = assign.right;
+                            remove(defs, def);
+                            defs.push(def);
+                            self.body[i].body = make_sequence(expr, expr.expressions.slice(1));
+                            continue;
+                        }
+                    }
+                    if (self.body[i] instanceof AST_EmptyStatement) {
+                        self.body.splice(i, 1);
+                        continue;
+                    }
+                    if (self.body[i] instanceof AST_BlockStatement) {
+                        self.body.splice(i, 1, ...self.body[i].body);
+                        continue;
+                    }
+                    break;
+                }
+                defs = make_node(AST_Var, self, {
+                    definitions: defs
+                });
+                hoisted.push(defs);
+            }
+        }
+        self.body = dirs.concat(hoisted, self.body);
+    }
+    return self;
+});
+
+AST_Scope.DEFMETHOD("hoist_properties", function(compressor) {
+    var self = this;
+    if (!compressor.option("hoist_props") || compressor.has_directive("use asm")) return self;
+    var top_retain = self instanceof AST_Toplevel && compressor.top_retain || return_false;
+    var defs_by_id = new Map();
+    var hoister = new TreeTransformer(function(node, descend) {
+        if (node instanceof AST_VarDef) {
+            const sym = node.name;
+            let def;
+            let value;
+            if (sym.scope === self
+                && !(sym instanceof AST_SymbolUsing)
+                && (def = sym.definition()).escaped != 1
+                && !def.assignments
+                && !def.direct_access
+                && !def.single_use
+                && !compressor.exposed(def)
+                && !top_retain(def)
+                && (value = sym.fixed_value()) === node.value
+                && value instanceof AST_Object
+                && !value.properties.some(prop =>
+                    prop instanceof AST_Expansion || prop.computed_key()
+                )
+            ) {
+                descend(node, this);
+                const defs = new Map();
+                const assignments = [];
+                value.properties.forEach(({ key, value }) => {
+                    const scope = hoister.find_scope();
+                    const symbol = self.create_symbol(sym.CTOR, {
+                        source: sym,
+                        scope,
+                        conflict_scopes: new Set([
+                            scope,
+                            ...sym.definition().references.map(ref => ref.scope)
+                        ]),
+                        tentative_name: sym.name + "_" + key
+                    });
+
+                    defs.set(String(key), symbol.definition());
+
+                    assignments.push(make_node(AST_VarDef, node, {
+                        name: symbol,
+                        value
+                    }));
+                });
+                defs_by_id.set(def.id, defs);
+                return MAP.splice(assignments);
+            }
+        } else if (node instanceof AST_PropAccess
+            && node.expression instanceof AST_SymbolRef
+        ) {
+            const defs = defs_by_id.get(node.expression.definition().id);
+            if (defs) {
+                const def = defs.get(String(get_simple_key(node.property)));
+                const sym = make_node(AST_SymbolRef, node, {
+                    name: def.name,
+                    scope: node.expression.scope,
+                    thedef: def
+                });
+                sym.reference({});
+                return sym;
+            }
+        }
+    });
+    return self.transform(hoister);
+});
+
+def_optimize(AST_SimpleStatement, function(self, compressor) {
+    if (compressor.option("side_effects")) {
+        var body = self.body;
+        var node = body.drop_side_effect_free(compressor, true);
+        if (!node) {
+            return make_node(AST_EmptyStatement, self);
+        }
+        if (node !== body) {
+            return make_node(AST_SimpleStatement, self, { body: node });
+        }
+    }
+    return self;
+});
+
+def_optimize(AST_While, function(self, compressor) {
+    return compressor.option("loops") ? make_node(AST_For, self, self).optimize(compressor) : self;
+});
+
+def_optimize(AST_Do, function(self, compressor) {
+    if (!compressor.option("loops")) return self;
+    var cond = self.condition.tail_node().evaluate(compressor);
+    if (!(cond instanceof AST_Node)) {
+        if (cond) return make_node(AST_For, self, {
+            body: make_node(AST_BlockStatement, self.body, {
+                body: [
+                    self.body,
+                    make_node(AST_SimpleStatement, self.condition, {
+                        body: self.condition
+                    })
+                ]
+            })
+        }).optimize(compressor);
+        if (!has_break_or_continue(self, compressor.parent())) {
+            return make_node(AST_BlockStatement, self.body, {
+                body: [
+                    self.body,
+                    make_node(AST_SimpleStatement, self.condition, {
+                        body: self.condition
+                    })
+                ]
+            }).optimize(compressor);
+        }
+    }
+    return self;
+});
+
+function if_break_in_loop(self, compressor) {
+    var first = self.body instanceof AST_BlockStatement ? self.body.body[0] : self.body;
+    if (compressor.option("dead_code") && is_break(first)) {
+        var body = [];
+        if (self.init instanceof AST_Statement) {
+            body.push(self.init);
+        } else if (self.init) {
+            body.push(make_node(AST_SimpleStatement, self.init, {
+                body: self.init
+            }));
+        }
+        if (self.condition) {
+            body.push(make_node(AST_SimpleStatement, self.condition, {
+                body: self.condition
+            }));
+        }
+        extract_from_unreachable_code(compressor, self.body, body);
+        return make_node(AST_BlockStatement, self, {
+            body: body
+        });
+    }
+    if (first instanceof AST_If) {
+        if (is_break(first.body)) {
+            if (self.condition) {
+                self.condition = make_node(AST_Binary, self.condition, {
+                    left: self.condition,
+                    operator: "&&",
+                    right: first.condition.negate(compressor),
+                });
+            } else {
+                self.condition = first.condition.negate(compressor);
+            }
+            drop_it(first.alternative);
+        } else if (is_break(first.alternative)) {
+            if (self.condition) {
+                self.condition = make_node(AST_Binary, self.condition, {
+                    left: self.condition,
+                    operator: "&&",
+                    right: first.condition,
+                });
+            } else {
+                self.condition = first.condition;
+            }
+            drop_it(first.body);
+        }
+    }
+    return self;
+
+    function is_break(node) {
+        return node instanceof AST_Break
+            && compressor.loopcontrol_target(node) === compressor.self();
+    }
+
+    function drop_it(rest) {
+        rest = as_statement_array(rest);
+        if (self.body instanceof AST_BlockStatement) {
+            self.body = self.body.clone();
+            self.body.body = rest.concat(self.body.body.slice(1));
+            self.body = self.body.transform(compressor);
+        } else {
+            self.body = make_node(AST_BlockStatement, self.body, {
+                body: rest
+            }).transform(compressor);
+        }
+        self = if_break_in_loop(self, compressor);
+    }
+}
+
+def_optimize(AST_For, function(self, compressor) {
+    if (!compressor.option("loops")) return self;
+    if (compressor.option("side_effects") && self.init) {
+        self.init = self.init.drop_side_effect_free(compressor);
+    }
+    if (self.condition) {
+        var cond = self.condition.evaluate(compressor);
+        if (!(cond instanceof AST_Node)) {
+            if (cond) self.condition = null;
+            else if (!compressor.option("dead_code")) {
+                var orig = self.condition;
+                self.condition = make_node_from_constant(cond, self.condition);
+                self.condition = best_of_expression(self.condition.transform(compressor), orig);
+            }
+        }
+        if (compressor.option("dead_code")) {
+            if (cond instanceof AST_Node) cond = self.condition.tail_node().evaluate(compressor);
+            if (!cond) {
+                var body = [];
+                extract_from_unreachable_code(compressor, self.body, body);
+                if (self.init instanceof AST_Statement) {
+                    body.push(self.init);
+                } else if (self.init) {
+                    body.push(make_node(AST_SimpleStatement, self.init, {
+                        body: self.init
+                    }));
+                }
+                body.push(make_node(AST_SimpleStatement, self.condition, {
+                    body: self.condition
+                }));
+                return make_node(AST_BlockStatement, self, { body: body }).optimize(compressor);
+            }
+        }
+    }
+    return if_break_in_loop(self, compressor);
+});
+
+def_optimize(AST_If, function(self, compressor) {
+    if (is_empty(self.alternative)) self.alternative = null;
+
+    if (!compressor.option("conditionals")) return self;
+    // if condition can be statically determined, drop
+    // one of the blocks.  note, statically determined implies
+    // “has no side effects”; also it doesn't work for cases like
+    // `x && true`, though it probably should.
+    var cond = self.condition.evaluate(compressor);
+    if (!compressor.option("dead_code") && !(cond instanceof AST_Node)) {
+        var orig = self.condition;
+        self.condition = make_node_from_constant(cond, orig);
+        self.condition = best_of_expression(self.condition.transform(compressor), orig);
+    }
+    if (compressor.option("dead_code")) {
+        if (cond instanceof AST_Node) cond = self.condition.tail_node().evaluate(compressor);
+        if (!cond) {
+            var body = [];
+            extract_from_unreachable_code(compressor, self.body, body);
+            body.push(make_node(AST_SimpleStatement, self.condition, {
+                body: self.condition
+            }));
+            if (self.alternative) body.push(self.alternative);
+            return make_node(AST_BlockStatement, self, { body: body }).optimize(compressor);
+        } else if (!(cond instanceof AST_Node)) {
+            var body = [];
+            body.push(make_node(AST_SimpleStatement, self.condition, {
+                body: self.condition
+            }));
+            body.push(self.body);
+            if (self.alternative) {
+                extract_from_unreachable_code(compressor, self.alternative, body);
+            }
+            return make_node(AST_BlockStatement, self, { body: body }).optimize(compressor);
+        }
+    }
+    var negated = self.condition.negate(compressor);
+    var self_condition_length = self.condition.size();
+    var negated_length = negated.size();
+    var negated_is_best = negated_length < self_condition_length;
+    if (self.alternative && negated_is_best) {
+        negated_is_best = false; // because we already do the switch here.
+        // no need to swap values of self_condition_length and negated_length
+        // here because they are only used in an equality comparison later on.
+        self.condition = negated;
+        var tmp = self.body;
+        self.body = self.alternative || make_node(AST_EmptyStatement, self);
+        self.alternative = tmp;
+    }
+    if (is_empty(self.body) && is_empty(self.alternative)) {
+        return make_node(AST_SimpleStatement, self.condition, {
+            body: self.condition.clone()
+        }).optimize(compressor);
+    }
+    if (self.body instanceof AST_SimpleStatement
+        && self.alternative instanceof AST_SimpleStatement) {
+        return make_node(AST_SimpleStatement, self, {
+            body: make_node(AST_Conditional, self, {
+                condition   : self.condition,
+                consequent  : self.body.body,
+                alternative : self.alternative.body
+            })
+        }).optimize(compressor);
+    }
+    if (is_empty(self.alternative) && self.body instanceof AST_SimpleStatement) {
+        if (self_condition_length === negated_length && !negated_is_best
+            && self.condition instanceof AST_Binary && self.condition.operator == "||") {
+            // although the code length of self.condition and negated are the same,
+            // negated does not require additional surrounding parentheses.
+            // see https://github.com/mishoo/UglifyJS2/issues/979
+            negated_is_best = true;
+        }
+        if (negated_is_best) return make_node(AST_SimpleStatement, self, {
+            body: make_node(AST_Binary, self, {
+                operator : "||",
+                left     : negated,
+                right    : self.body.body
+            })
+        }).optimize(compressor);
+        return make_node(AST_SimpleStatement, self, {
+            body: make_node(AST_Binary, self, {
+                operator : "&&",
+                left     : self.condition,
+                right    : self.body.body
+            })
+        }).optimize(compressor);
+    }
+    if (self.body instanceof AST_EmptyStatement
+        && self.alternative instanceof AST_SimpleStatement) {
+        return make_node(AST_SimpleStatement, self, {
+            body: make_node(AST_Binary, self, {
+                operator : "||",
+                left     : self.condition,
+                right    : self.alternative.body
+            })
+        }).optimize(compressor);
+    }
+    if (self.body instanceof AST_Exit
+        && self.alternative instanceof AST_Exit
+        && self.body.TYPE == self.alternative.TYPE) {
+        return make_node(self.body.CTOR, self, {
+            value: make_node(AST_Conditional, self, {
+                condition   : self.condition,
+                consequent  : self.body.value || make_void_0(self.body),
+                alternative : self.alternative.value || make_void_0(self.alternative),
+            }).transform(compressor)
+        }).optimize(compressor);
+    }
+    if (self.body instanceof AST_If
+        && !self.body.alternative
+        && !self.alternative) {
+        self = make_node(AST_If, self, {
+            condition: make_node(AST_Binary, self.condition, {
+                operator: "&&",
+                left: self.condition,
+                right: self.body.condition
+            }),
+            body: self.body.body,
+            alternative: null
+        });
+    }
+    if (aborts(self.body)) {
+        if (self.alternative) {
+            var alt = self.alternative;
+            self.alternative = null;
+            return make_node(AST_BlockStatement, self, {
+                body: [ self, alt ]
+            }).optimize(compressor);
+        }
+    }
+    if (aborts(self.alternative)) {
+        var body = self.body;
+        self.body = self.alternative;
+        self.condition = negated_is_best ? negated : self.condition.negate(compressor);
+        self.alternative = null;
+        return make_node(AST_BlockStatement, self, {
+            body: [ self, body ]
+        }).optimize(compressor);
+    }
+    return self;
+});
+
+def_optimize(AST_Switch, function(self, compressor) {
+    if (!compressor.option("switches")) return self;
+    var branch;
+    var value = self.expression.evaluate(compressor);
+    if (!(value instanceof AST_Node)) {
+        var orig = self.expression;
+        self.expression = make_node_from_constant(value, orig);
+        self.expression = best_of_expression(self.expression.transform(compressor), orig);
+    }
+    if (!compressor.option("dead_code")) return self;
+    if (value instanceof AST_Node) {
+        value = self.expression.tail_node().evaluate(compressor);
+    }
+    var decl = [];
+    var body = [];
+    var default_branch;
+    var exact_match;
+    // - compress self.body into `body`
+    // - find and deduplicate default branch
+    // - find the exact match (`case 1234` inside `switch(1234)`)
+    for (var i = 0, len = self.body.length; i < len && !exact_match; i++) {
+        branch = self.body[i];
+        if (branch instanceof AST_Default) {
+            if (!default_branch) {
+                default_branch = branch;
+            } else {
+                eliminate_branch(branch, body[body.length - 1]);
+            }
+        } else if (!(value instanceof AST_Node)) {
+            var exp = branch.expression.evaluate(compressor);
+            if (!(exp instanceof AST_Node) && exp !== value) {
+                eliminate_branch(branch, body[body.length - 1]);
+                continue;
+            }
+            if (exp instanceof AST_Node && !exp.has_side_effects(compressor)) {
+                exp = branch.expression.tail_node().evaluate(compressor);
+            }
+            if (exp === value) {
+                exact_match = branch;
+                if (default_branch) {
+                    var default_index = body.indexOf(default_branch);
+                    body.splice(default_index, 1);
+                    eliminate_branch(default_branch, body[default_index - 1]);
+                    default_branch = null;
+                }
+            }
+        }
+        body.push(branch);
+    }
+    // i < len if we found an exact_match. eliminate the rest
+    while (i < len) eliminate_branch(self.body[i++], body[body.length - 1]);
+    self.body = body;
+
+    let default_or_exact = default_branch || exact_match;
+    default_branch = null;
+    exact_match = null;
+
+    // group equivalent branches so they will be located next to each other,
+    // that way the next micro-optimization will merge them.
+    // ** bail micro-optimization if not a simple switch case with breaks
+    if (body.every((branch, i) =>
+        (branch === default_or_exact || branch.expression instanceof AST_Constant)
+        && (branch.body.length === 0 || aborts(branch) || body.length - 1 === i))
+    ) {
+        for (let i = 0; i < body.length; i++) {
+            const branch = body[i];
+            for (let j = i + 1; j < body.length; j++) {
+                const next = body[j];
+                if (next.body.length === 0) continue;
+                const last_branch = j === (body.length - 1);
+                const equivalentBranch = branches_equivalent(next, branch, false);
+                if (equivalentBranch || (last_branch && branches_equivalent(next, branch, true))) {
+                    if (!equivalentBranch && last_branch) {
+                        next.body.push(make_node(AST_Break));
+                    }
+
+                    // let's find previous siblings with inert fallthrough...
+                    let x = j - 1;
+                    let fallthroughDepth = 0;
+                    while (x > i) {
+                        if (is_inert_body(body[x--])) {
+                            fallthroughDepth++;
+                        } else {
+                            break;
+                        }
+                    }
+
+                    const plucked = body.splice(j - fallthroughDepth, 1 + fallthroughDepth);
+                    body.splice(i + 1, 0, ...plucked);
+                    i += plucked.length;
+                }
+            }
+        }
+    }
+
+    // merge equivalent branches in a row
+    for (let i = 0; i < body.length; i++) {
+        let branch = body[i];
+        if (branch.body.length === 0) continue;
+        if (!aborts(branch)) continue;
+
+        for (let j = i + 1; j < body.length; i++, j++) {
+            let next = body[j];
+            if (next.body.length === 0) continue;
+            if (
+                branches_equivalent(next, branch, false)
+                || (j === body.length - 1 && branches_equivalent(next, branch, true))
+            ) {
+                branch.body = [];
+                branch = next;
+                continue;
+            }
+            break;
+        }
+    }
+
+    // Prune any empty branches at the end of the switch statement.
+    {
+        let i = body.length - 1;
+        for (; i >= 0; i--) {
+            let bbody = body[i].body;
+            while (is_break(bbody[bbody.length - 1], compressor)) bbody.pop();
+            if (!is_inert_body(body[i])) break;
+        }
+        // i now points to the index of a branch that contains a body. By incrementing, it's
+        // pointing to the first branch that's empty.
+        i++;
+        if (!default_or_exact || body.indexOf(default_or_exact) >= i) {
+            // The default behavior is to do nothing. We can take advantage of that to
+            // remove all case expressions that are side-effect free that also do
+            // nothing, since they'll default to doing nothing. But we can't remove any
+            // case expressions before one that would side-effect, since they may cause
+            // the side-effect to be skipped.
+            for (let j = body.length - 1; j >= i; j--) {
+                let branch = body[j];
+                if (branch === default_or_exact) {
+                    default_or_exact = null;
+                    eliminate_branch(body.pop());
+                } else if (!branch.expression.has_side_effects(compressor)) {
+                    eliminate_branch(body.pop());
+                } else {
+                    break;
+                }
+            }
+        }
+    }
+
+
+    // Prune side-effect free branches that fall into default.
+    DEFAULT: if (default_or_exact) {
+        let default_index = body.indexOf(default_or_exact);
+        let default_body_index = default_index;
+        for (; default_body_index < body.length - 1; default_body_index++) {
+            if (!is_inert_body(body[default_body_index])) break;
+        }
+        if (default_body_index < body.length - 1) {
+            break DEFAULT;
+        }
+
+        let side_effect_index = body.length - 1;
+        for (; side_effect_index >= 0; side_effect_index--) {
+            let branch = body[side_effect_index];
+            if (branch === default_or_exact) continue;
+            if (branch.expression.has_side_effects(compressor)) break;
+        }
+        // If the default behavior comes after any side-effect case expressions,
+        // then we can fold all side-effect free cases into the default branch.
+        // If the side-effect case is after the default, then any side-effect
+        // free cases could prevent the side-effect from occurring.
+        if (default_body_index > side_effect_index) {
+            let prev_body_index = default_index - 1;
+            for (; prev_body_index >= 0; prev_body_index--) {
+                if (!is_inert_body(body[prev_body_index])) break;
+            }
+            let before = Math.max(side_effect_index, prev_body_index) + 1;
+            let after = default_index;
+            if (side_effect_index > default_index) {
+                // If the default falls into the same body as a side-effect
+                // case, then we need preserve that case and only prune the
+                // cases after it.
+                after = side_effect_index;
+                body[side_effect_index].body = body[default_body_index].body;
+            } else {
+                // The default will be the last branch.
+                default_or_exact.body = body[default_body_index].body;
+            }
+
+            // Prune everything after the default (or last side-effect case)
+            // until the next case with a body.
+            body.splice(after + 1, default_body_index - after);
+            // Prune everything before the default that falls into it.
+            body.splice(before, default_index - before);
+        }
+    }
+
+    // See if we can remove the switch entirely if all cases (the default) fall into the same case body.
+    DEFAULT: if (default_or_exact) {
+        let i = body.findIndex(branch => !is_inert_body(branch));
+        let caseBody;
+        // `i` is equal to one of the following:
+        // - `-1`, there is no body in the switch statement.
+        // - `body.length - 1`, all cases fall into the same body.
+        // - anything else, there are multiple bodies in the switch.
+        if (i === body.length - 1) {
+            // All cases fall into the case body.
+            let branch = body[i];
+            if (has_nested_break(self)) break DEFAULT;
+
+            // This is the last case body, and we've already pruned any breaks, so it's
+            // safe to hoist.
+            caseBody = make_node(AST_BlockStatement, branch, {
+                body: branch.body
+            });
+            branch.body = [];
+        } else if (i !== -1) {
+            // If there are multiple bodies, then we cannot optimize anything.
+            break DEFAULT;
+        }
+
+        let sideEffect = body.find(
+            branch => branch !== default_or_exact && branch.expression.has_side_effects(compressor)
+        );
+        // If no cases cause a side-effect, we can eliminate the switch entirely.
+        if (!sideEffect) {
+            return make_node(AST_BlockStatement, self, {
+                body: decl.concat(
+                    statement(self.expression),
+                    default_or_exact.expression ? statement(default_or_exact.expression) : [],
+                    caseBody || []
+                )
+            }).optimize(compressor);
+        }
+
+        // If we're this far, either there was no body or all cases fell into the same body.
+        // If there was no body, then we don't need a default branch (because the default is
+        // do nothing). If there was a body, we'll extract it to after the switch, so the
+        // switch's new default is to do nothing and we can still prune it.
+        const default_index = body.indexOf(default_or_exact);
+        body.splice(default_index, 1);
+        default_or_exact = null;
+
+        if (caseBody) {
+            // Recurse into switch statement one more time so that we can append the case body
+            // outside of the switch. This recursion will only happen once since we've pruned
+            // the default case.
+            return make_node(AST_BlockStatement, self, {
+                body: decl.concat(self, caseBody)
+            }).optimize(compressor);
+        }
+        // If we fall here, there is a default branch somewhere, there are no case bodies,
+        // and there's a side-effect somewhere. Just let the below paths take care of it.
+    }
+
+    // Reintegrate `decl` (var statements)
+    if (body.length > 0) {
+        body[0].body = decl.concat(body[0].body);
+    }
+    if (body.length == 0) {
+        return make_node(AST_BlockStatement, self, {
+            body: decl.concat(statement(self.expression))
+        }).optimize(compressor);
+    }
+
+    if (body.length == 1 && !has_nested_break(self)) {
+        // This is the last case body, and we've already pruned any breaks, so it's
+        // safe to hoist.
+        let branch = body[0];
+        return make_node(AST_If, self, {
+            condition: make_node(AST_Binary, self, {
+                operator: "===",
+                left: self.expression,
+                right: branch.expression,
+            }),
+            body: make_node(AST_BlockStatement, branch, {
+                body: branch.body
+            }),
+            alternative: null
+        }).optimize(compressor);
+    }
+    if (body.length === 2 && default_or_exact && !has_nested_break(self)) {
+        let branch = body[0] === default_or_exact ? body[1] : body[0];
+        let exact_exp = default_or_exact.expression && statement(default_or_exact.expression);
+        if (aborts(body[0])) {
+            // Only the first branch body could have a break (at the last statement)
+            let first = body[0];
+            if (is_break(first.body[first.body.length - 1], compressor)) {
+                first.body.pop();
+            }
+            return make_node(AST_If, self, {
+                condition: make_node(AST_Binary, self, {
+                    operator: "===",
+                    left: self.expression,
+                    right: branch.expression,
+                }),
+                body: make_node(AST_BlockStatement, branch, {
+                    body: branch.body
+                }),
+                alternative: make_node(AST_BlockStatement, default_or_exact, {
+                    body: [].concat(
+                        exact_exp || [],
+                        default_or_exact.body
+                    )
+                })
+            }).optimize(compressor);
+        }
+        let operator = "===";
+        let consequent = make_node(AST_BlockStatement, branch, {
+            body: branch.body,
+        });
+        let always = make_node(AST_BlockStatement, default_or_exact, {
+            body: [].concat(
+                exact_exp || [],
+                default_or_exact.body
+            )
+        });
+        if (body[0] === default_or_exact) {
+            operator = "!==";
+            let tmp = always;
+            always = consequent;
+            consequent = tmp;
+        }
+        return make_node(AST_BlockStatement, self, {
+            body: [
+                make_node(AST_If, self, {
+                    condition: make_node(AST_Binary, self, {
+                        operator: operator,
+                        left: self.expression,
+                        right: branch.expression,
+                    }),
+                    body: consequent,
+                    alternative: null,
+                }),
+                always,
+            ],
+        }).optimize(compressor);
+    }
+    return self;
+
+    function eliminate_branch(branch, prev) {
+        if (prev && !aborts(prev)) {
+            prev.body = prev.body.concat(branch.body);
+        } else {
+            extract_from_unreachable_code(compressor, branch, decl);
+        }
+    }
+    function branches_equivalent(branch, prev, insertBreak) {
+        let bbody = branch.body;
+        let pbody = prev.body;
+        if (insertBreak) {
+            bbody = bbody.concat(make_node(AST_Break));
+        }
+        if (bbody.length !== pbody.length) return false;
+        let bblock = make_node(AST_BlockStatement, branch, { body: bbody });
+        let pblock = make_node(AST_BlockStatement, prev, { body: pbody });
+        return bblock.equivalent_to(pblock);
+    }
+    function statement(body) {
+        return make_node(AST_SimpleStatement, body, { body });
+    }
+    function has_nested_break(root) {
+        let has_break = false;
+
+        let tw = new TreeWalker(node => {
+            if (has_break) return true;
+            if (node instanceof AST_Lambda) return true;
+            if (node instanceof AST_SimpleStatement) return true;
+            if (!is_break(node, tw)) return;
+            let parent = tw.parent();
+            if (
+                parent instanceof AST_SwitchBranch
+                && parent.body[parent.body.length - 1] === node
+            ) {
+                return;
+            }
+            has_break = true;
+        });
+        root.walk(tw);
+        return has_break;
+    }
+    function is_break(node, stack) {
+        return node instanceof AST_Break
+            && stack.loopcontrol_target(node) === self;
+    }
+    function is_inert_body(branch) {
+        return !aborts(branch) && !make_node(AST_BlockStatement, branch, {
+            body: branch.body
+        }).has_side_effects(compressor);
+    }
+});
+
+def_optimize(AST_Try, function(self, compressor) {
+    if (self.bcatch && self.bfinally && self.bfinally.body.every(is_empty)) self.bfinally = null;
+
+    if (compressor.option("dead_code") && self.body.body.every(is_empty)) {
+        var body = [];
+        if (self.bcatch) {
+            extract_from_unreachable_code(compressor, self.bcatch, body);
+        }
+        if (self.bfinally) body.push(...self.bfinally.body);
+        return make_node(AST_BlockStatement, self, {
+            body: body
+        }).optimize(compressor);
+    }
+    return self;
+});
+
+AST_Definitions.DEFMETHOD("to_assignments", function(compressor) {
+    var reduce_vars = compressor.option("reduce_vars");
+    var assignments = [];
+
+    for (const def of this.definitions) {
+        if (def.value) {
+            var name = make_node(AST_SymbolRef, def.name, def.name);
+            assignments.push(make_node(AST_Assign, def, {
+                operator : "=",
+                logical: false,
+                left     : name,
+                right    : def.value
+            }));
+            if (reduce_vars) name.definition().fixed = false;
+        }
+        const thedef = def.name.definition();
+        thedef.eliminated++;
+        thedef.replaced--;
+    }
+
+    if (assignments.length == 0) return null;
+    return make_sequence(this, assignments);
+});
+
+def_optimize(AST_Definitions, function(self) {
+    if (self.definitions.length == 0) {
+        return make_node(AST_EmptyStatement, self);
+    }
+    return self;
+});
+
+def_optimize(AST_VarDef, function(self, compressor) {
+    if (
+        self.name instanceof AST_SymbolLet
+        && self.value != null
+        && is_undefined(self.value, compressor)
+    ) {
+        self.value = null;
+    }
+    return self;
+});
+
+def_optimize(AST_Import, function(self) {
+    return self;
+});
+
+def_optimize(AST_Call, function(self, compressor) {
+    var exp = self.expression;
+    var fn = exp;
+    inline_array_like_spread(self.args);
+    var simple_args = self.args.every((arg) => !(arg instanceof AST_Expansion));
+
+    if (compressor.option("reduce_vars") && fn instanceof AST_SymbolRef) {
+        fn = fn.fixed_value();
+    }
+
+    var is_func = fn instanceof AST_Lambda;
+
+    if (is_func && fn.pinned()) return self;
+
+    if (compressor.option("unused")
+        && simple_args
+        && is_func
+        && !fn.uses_arguments) {
+        var pos = 0, last = 0;
+        for (var i = 0, len = self.args.length; i < len; i++) {
+            if (fn.argnames[i] instanceof AST_Expansion) {
+                if (has_flag(fn.argnames[i].expression, UNUSED)) while (i < len) {
+                    var node = self.args[i++].drop_side_effect_free(compressor);
+                    if (node) {
+                        self.args[pos++] = node;
+                    }
+                } else while (i < len) {
+                    self.args[pos++] = self.args[i++];
+                }
+                last = pos;
+                break;
+            }
+            var trim = i >= fn.argnames.length;
+            if (trim || has_flag(fn.argnames[i], UNUSED)) {
+                var node = self.args[i].drop_side_effect_free(compressor);
+                if (node) {
+                    self.args[pos++] = node;
+                } else if (!trim) {
+                    self.args[pos++] = make_node(AST_Number, self.args[i], {
+                        value: 0
+                    });
+                    continue;
+                }
+            } else {
+                self.args[pos++] = self.args[i];
+            }
+            last = pos;
+        }
+        self.args.length = last;
+    }
+
+    if (
+        exp instanceof AST_Dot
+        && exp.expression instanceof AST_SymbolRef
+        && exp.expression.name === "console"
+        && exp.expression.definition().undeclared
+        && exp.property === "assert"
+    ) {
+        const condition = self.args[0];
+        if (condition) {
+            const value = condition.evaluate(compressor);
+    
+            if (value === 1 || value === true) {
+                return make_void_0(self).optimize(compressor);
+            }
+        }
+    }    
+
+    if (compressor.option("unsafe") && !exp.contains_optional()) {
+        if (exp instanceof AST_Dot && exp.start.value === "Array" && exp.property === "from" && self.args.length === 1) {
+            const [argument] = self.args;
+            if (argument instanceof AST_Array) {
+                return make_node(AST_Array, argument, {
+                    elements: argument.elements
+                }).optimize(compressor);
+            }
+        }
+        if (is_undeclared_ref(exp)) switch (exp.name) {
+          case "Array":
+            if (self.args.length != 1) {
+                return make_node(AST_Array, self, {
+                    elements: self.args
+                }).optimize(compressor);
+            } else if (self.args[0] instanceof AST_Number && self.args[0].value <= 11) {
+                const elements = [];
+                for (let i = 0; i < self.args[0].value; i++) elements.push(new AST_Hole);
+                return new AST_Array({ elements });
+            }
+            break;
+          case "Object":
+            if (self.args.length == 0) {
+                return make_node(AST_Object, self, {
+                    properties: []
+                });
+            }
+            break;
+          case "String":
+            if (self.args.length == 0) return make_node(AST_String, self, {
+                value: ""
+            });
+            if (self.args.length <= 1) return make_node(AST_Binary, self, {
+                left: self.args[0],
+                operator: "+",
+                right: make_node(AST_String, self, { value: "" })
+            }).optimize(compressor);
+            break;
+          case "Number":
+            if (self.args.length == 0) return make_node(AST_Number, self, {
+                value: 0
+            });
+            if (self.args.length == 1 && compressor.option("unsafe_math")) {
+                return make_node(AST_UnaryPrefix, self, {
+                    expression: self.args[0],
+                    operator: "+"
+                }).optimize(compressor);
+            }
+            break;
+          case "Symbol":
+            if (self.args.length == 1 && self.args[0] instanceof AST_String && compressor.option("unsafe_symbols"))
+                self.args.length = 0;
+                break;
+          case "Boolean":
+            if (self.args.length == 0) return make_node(AST_False, self);
+            if (self.args.length == 1) return make_node(AST_UnaryPrefix, self, {
+                expression: make_node(AST_UnaryPrefix, self, {
+                    expression: self.args[0],
+                    operator: "!"
+                }),
+                operator: "!"
+            }).optimize(compressor);
+            break;
+          case "RegExp":
+            var params = [];
+            if (self.args.length >= 1
+                && self.args.length <= 2
+                && self.args.every((arg) => {
+                    var value = arg.evaluate(compressor);
+                    params.push(value);
+                    return arg !== value;
+                })
+                && regexp_is_safe(params[0])
+            ) {
+                let [ source, flags ] = params;
+                source = regexp_source_fix(new RegExp(source).source);
+                const rx = make_node(AST_RegExp, self, {
+                    value: { source, flags }
+                });
+                if (rx._eval(compressor) !== rx) {
+                    return rx;
+                }
+            }
+            break;
+        } else if (exp instanceof AST_Dot) switch(exp.property) {
+          case "toString":
+            if (self.args.length == 0 && !exp.expression.may_throw_on_access(compressor)) {
+                return make_node(AST_Binary, self, {
+                    left: make_node(AST_String, self, { value: "" }),
+                    operator: "+",
+                    right: exp.expression
+                }).optimize(compressor);
+            }
+            break;
+          case "join":
+            if (exp.expression instanceof AST_Array) EXIT: {
+                var separator;
+                if (self.args.length > 0) {
+                    separator = self.args[0].evaluate(compressor);
+                    if (separator === self.args[0]) break EXIT; // not a constant
+                }
+                var elements = [];
+                var consts = [];
+                for (var i = 0, len = exp.expression.elements.length; i < len; i++) {
+                    var el = exp.expression.elements[i];
+                    if (el instanceof AST_Expansion) break EXIT;
+                    var value = el.evaluate(compressor);
+                    if (value !== el) {
+                        consts.push(value);
+                    } else {
+                        if (consts.length > 0) {
+                            elements.push(make_node(AST_String, self, {
+                                value: consts.join(separator)
+                            }));
+                            consts.length = 0;
+                        }
+                        elements.push(el);
+                    }
+                }
+                if (consts.length > 0) {
+                    elements.push(make_node(AST_String, self, {
+                        value: consts.join(separator)
+                    }));
+                }
+                if (elements.length == 0) return make_node(AST_String, self, { value: "" });
+                if (elements.length == 1) {
+                    if (elements[0].is_string(compressor)) {
+                        return elements[0];
+                    }
+                    return make_node(AST_Binary, elements[0], {
+                        operator : "+",
+                        left     : make_node(AST_String, self, { value: "" }),
+                        right    : elements[0]
+                    });
+                }
+                if (separator == "") {
+                    var first;
+                    if (elements[0].is_string(compressor)
+                        || elements[1].is_string(compressor)) {
+                        first = elements.shift();
+                    } else {
+                        first = make_node(AST_String, self, { value: "" });
+                    }
+                    return elements.reduce(function(prev, el) {
+                        return make_node(AST_Binary, el, {
+                            operator : "+",
+                            left     : prev,
+                            right    : el
+                        });
+                    }, first).optimize(compressor);
+                }
+                // need this awkward cloning to not affect original element
+                // best_of will decide which one to get through.
+                var node = self.clone();
+                node.expression = node.expression.clone();
+                node.expression.expression = node.expression.expression.clone();
+                node.expression.expression.elements = elements;
+                return best_of(compressor, self, node);
+            }
+            break;
+          case "charAt":
+            if (exp.expression.is_string(compressor)) {
+                var arg = self.args[0];
+                var index = arg ? arg.evaluate(compressor) : 0;
+                if (index !== arg) {
+                    return make_node(AST_Sub, exp, {
+                        expression: exp.expression,
+                        property: make_node_from_constant(index | 0, arg || exp)
+                    }).optimize(compressor);
+                }
+            }
+            break;
+          case "apply":
+            if (self.args.length == 2 && self.args[1] instanceof AST_Array) {
+                var args = self.args[1].elements.slice();
+                args.unshift(self.args[0]);
+                return make_node(AST_Call, self, {
+                    expression: make_node(AST_Dot, exp, {
+                        expression: exp.expression,
+                        optional: false,
+                        property: "call"
+                    }),
+                    args: args
+                }).optimize(compressor);
+            }
+            break;
+          case "call":
+            var func = exp.expression;
+            if (func instanceof AST_SymbolRef) {
+                func = func.fixed_value();
+            }
+            if (func instanceof AST_Lambda && !func.contains_this()) {
+                return (self.args.length ? make_sequence(this, [
+                    self.args[0],
+                    make_node(AST_Call, self, {
+                        expression: exp.expression,
+                        args: self.args.slice(1)
+                    })
+                ]) : make_node(AST_Call, self, {
+                    expression: exp.expression,
+                    args: []
+                })).optimize(compressor);
+            }
+            break;
+        }
+    }
+
+    if (compressor.option("unsafe_Function")
+        && is_undeclared_ref(exp)
+        && exp.name == "Function") {
+        // new Function() => function(){}
+        if (self.args.length == 0) return make_empty_function(self).optimize(compressor);
+        if (self.args.every((x) => x instanceof AST_String)) {
+            // quite a corner-case, but we can handle it:
+            //   https://github.com/mishoo/UglifyJS2/issues/203
+            // if the code argument is a constant, then we can minify it.
+            try {
+                var code = "n(function(" + self.args.slice(0, -1).map(function(arg) {
+                    return arg.value;
+                }).join(",") + "){" + self.args[self.args.length - 1].value + "})";
+                var ast = parse(code);
+                var mangle = compressor.mangle_options();
+                ast.figure_out_scope(mangle);
+                var comp = new Compressor(compressor.options, {
+                    mangle_options: compressor._mangle_options
+                });
+                ast = ast.transform(comp);
+                ast.figure_out_scope(mangle);
+                ast.compute_char_frequency(mangle);
+                ast.mangle_names(mangle);
+                var fun;
+                walk(ast, node => {
+                    if (is_func_expr(node)) {
+                        fun = node;
+                        return walk_abort;
+                    }
+                });
+                var code = OutputStream();
+                AST_BlockStatement.prototype._codegen.call(fun, fun, code);
+                self.args = [
+                    make_node(AST_String, self, {
+                        value: fun.argnames.map(function(arg) {
+                            return arg.print_to_string();
+                        }).join(",")
+                    }),
+                    make_node(AST_String, self.args[self.args.length - 1], {
+                        value: code.get().replace(/^{|}$/g, "")
+                    })
+                ];
+                return self;
+            } catch (ex) {
+                if (!(ex instanceof JS_Parse_Error)) {
+                    throw ex;
+                }
+
+                // Otherwise, it crashes at runtime. Or maybe it's nonstandard syntax.
+            }
+        }
+    }
+
+    return inline_into_call(self, compressor);
+});
+
+/** Does this node contain optional property access or optional call? */
+AST_Node.DEFMETHOD("contains_optional", function() {
+    if (
+        this instanceof AST_PropAccess
+        || this instanceof AST_Call
+        || this instanceof AST_Chain
+    ) {
+        if (this.optional) {
+            return true;
+        } else {
+            return this.expression.contains_optional();
+        }
+    } else {
+        return false;
+    }
+});
+
+def_optimize(AST_New, function(self, compressor) {
+    if (
+        compressor.option("unsafe") &&
+        is_undeclared_ref(self.expression) &&
+        ["Object", "RegExp", "Function", "Error", "Array"].includes(self.expression.name)
+    ) return make_node(AST_Call, self, self).transform(compressor);
+    return self;
+});
+
+def_optimize(AST_Sequence, function(self, compressor) {
+    if (!compressor.option("side_effects")) return self;
+    var expressions = [];
+    filter_for_side_effects();
+    var end = expressions.length - 1;
+    trim_right_for_undefined();
+    if (end == 0) {
+        self = maintain_this_binding(compressor.parent(), compressor.self(), expressions[0]);
+        if (!(self instanceof AST_Sequence)) self = self.optimize(compressor);
+        return self;
+    }
+    self.expressions = expressions;
+    return self;
+
+    function filter_for_side_effects() {
+        var first = first_in_statement(compressor);
+        var last = self.expressions.length - 1;
+        self.expressions.forEach(function(expr, index) {
+            if (index < last) expr = expr.drop_side_effect_free(compressor, first);
+            if (expr) {
+                merge_sequence(expressions, expr);
+                first = false;
+            }
+        });
+    }
+
+    function trim_right_for_undefined() {
+        while (end > 0 && is_undefined(expressions[end], compressor)) end--;
+        if (end < expressions.length - 1) {
+            expressions[end] = make_node(AST_UnaryPrefix, self, {
+                operator   : "void",
+                expression : expressions[end]
+            });
+            expressions.length = end + 1;
+        }
+    }
+});
+
+AST_Unary.DEFMETHOD("lift_sequences", function(compressor) {
+    if (compressor.option("sequences")) {
+        if (this.expression instanceof AST_Sequence) {
+            var x = this.expression.expressions.slice();
+            var e = this.clone();
+            e.expression = x.pop();
+            x.push(e);
+            return make_sequence(this, x).optimize(compressor);
+        }
+    }
+    return this;
+});
+
+def_optimize(AST_UnaryPostfix, function(self, compressor) {
+    return self.lift_sequences(compressor);
+});
+
+def_optimize(AST_UnaryPrefix, function(self, compressor) {
+    var e = self.expression;
+    if (
+        self.operator == "delete" &&
+        !(
+            e instanceof AST_SymbolRef ||
+            e instanceof AST_PropAccess ||
+            e instanceof AST_Chain ||
+            is_identifier_atom(e)
+        )
+    ) {
+        return make_sequence(self, [e, make_node(AST_True, self)]).optimize(compressor);
+    }
+    // Short-circuit common `void 0`
+    if (self.operator === "void" && e instanceof AST_Number && e.value === 0) {
+        return unsafe_undefined_ref(self, compressor) || self;
+    }
+    var seq = self.lift_sequences(compressor);
+    if (seq !== self) {
+        return seq;
+    }
+    if (compressor.option("side_effects") && self.operator == "void") {
+        e = e.drop_side_effect_free(compressor);
+        if (e) {
+            self.expression = e;
+            return self;
+        } else {
+            return make_void_0(self).optimize(compressor);
+        }
+    }
+    if (compressor.in_boolean_context()) {
+        switch (self.operator) {
+          case "!":
+            if (e instanceof AST_UnaryPrefix && e.operator == "!") {
+                // !!foo ==> foo, if we're in boolean context
+                return e.expression;
+            }
+            if (e instanceof AST_Binary) {
+                self = best_of(compressor, self, e.negate(compressor, first_in_statement(compressor)));
+            }
+            break;
+          case "typeof":
+            // typeof always returns a non-empty string, thus it's
+            // always true in booleans
+            // And we don't need to check if it's undeclared, because in typeof, that's OK
+            return (e instanceof AST_SymbolRef ? make_node(AST_True, self) : make_sequence(self, [
+                e,
+                make_node(AST_True, self)
+            ])).optimize(compressor);
+        }
+    }
+    if (self.operator == "-" && e instanceof AST_Infinity) {
+        e = e.transform(compressor);
+    }
+    if (e instanceof AST_Binary
+        && (self.operator == "+" || self.operator == "-")
+        && (e.operator == "*" || e.operator == "/" || e.operator == "%")) {
+        return make_node(AST_Binary, self, {
+            operator: e.operator,
+            left: make_node(AST_UnaryPrefix, e.left, {
+                operator: self.operator,
+                expression: e.left
+            }),
+            right: e.right
+        });
+    }
+
+    if (compressor.option("evaluate")) {
+        // ~~x => x (in 32-bit context)
+        // ~~{32 bit integer} => {32 bit integer}
+        if (
+            self.operator === "~"
+            && self.expression instanceof AST_UnaryPrefix
+            && self.expression.operator === "~"
+            && (compressor.in_32_bit_context(false) || self.expression.expression.is_32_bit_integer(compressor))
+        ) {
+            return self.expression.expression;
+        }
+
+        // ~(x ^ y) => x ^ ~y
+        if (
+            self.operator === "~"
+            && e instanceof AST_Binary
+            && e.operator === "^"
+        ) {
+            if (e.left instanceof AST_UnaryPrefix && e.left.operator === "~") {
+                // ~(~x ^ y) => x ^ y
+                e.left = e.left.bitwise_negate(compressor, true);
+            } else {
+                e.right = e.right.bitwise_negate(compressor, true);
+            }
+            return e;
+        }
+    }
+
+    if (
+        self.operator != "-"
+        // avoid infinite recursion of numerals
+        || !(e instanceof AST_Number || e instanceof AST_Infinity || e instanceof AST_BigInt)
+    ) {
+        var ev = self.evaluate(compressor);
+        if (ev !== self) {
+            ev = make_node_from_constant(ev, self).optimize(compressor);
+            return best_of(compressor, ev, self);
+        }
+    }
+    return self;
+});
+
+AST_Binary.DEFMETHOD("lift_sequences", function(compressor) {
+    if (compressor.option("sequences")) {
+        if (this.left instanceof AST_Sequence) {
+            var x = this.left.expressions.slice();
+            var e = this.clone();
+            e.left = x.pop();
+            x.push(e);
+            return make_sequence(this, x).optimize(compressor);
+        }
+        if (this.right instanceof AST_Sequence && !this.left.has_side_effects(compressor)) {
+            var assign = this.operator == "=" && this.left instanceof AST_SymbolRef;
+            var x = this.right.expressions;
+            var last = x.length - 1;
+            for (var i = 0; i < last; i++) {
+                if (!assign && x[i].has_side_effects(compressor)) break;
+            }
+            if (i == last) {
+                x = x.slice();
+                var e = this.clone();
+                e.right = x.pop();
+                x.push(e);
+                return make_sequence(this, x).optimize(compressor);
+            } else if (i > 0) {
+                var e = this.clone();
+                e.right = make_sequence(this.right, x.slice(i));
+                x = x.slice(0, i);
+                x.push(e);
+                return make_sequence(this, x).optimize(compressor);
+            }
+        }
+    }
+    return this;
+});
+
+var commutativeOperators = makePredicate("== === != !== * & | ^");
+function is_object(node) {
+    return node instanceof AST_Array
+        || node instanceof AST_Lambda
+        || node instanceof AST_Object
+        || node instanceof AST_Class;
+}
+
+def_optimize(AST_Binary, function(self, compressor) {
+    function reversible() {
+        return self.left.is_constant()
+            || self.right.is_constant()
+            || !self.left.has_side_effects(compressor)
+                && !self.right.has_side_effects(compressor);
+    }
+    function reverse(op) {
+        if (reversible()) {
+            if (op) self.operator = op;
+            var tmp = self.left;
+            self.left = self.right;
+            self.right = tmp;
+        }
+    }
+    if (compressor.option("lhs_constants") && commutativeOperators.has(self.operator)) {
+        if (self.right.is_constant()
+            && !self.left.is_constant()) {
+            // if right is a constant, whatever side effects the
+            // left side might have could not influence the
+            // result.  hence, force switch.
+
+            if (!(self.left instanceof AST_Binary
+                  && PRECEDENCE[self.left.operator] >= PRECEDENCE[self.operator])) {
+                reverse();
+            }
+        }
+    }
+    self = self.lift_sequences(compressor);
+    if (compressor.option("comparisons")) switch (self.operator) {
+      case "===":
+      case "!==":
+        var is_strict_comparison = true;
+        if (
+            (self.left.is_string(compressor) && self.right.is_string(compressor)) ||
+            (self.left.is_number(compressor) && self.right.is_number(compressor)) ||
+            (self.left.is_bigint(compressor) && self.right.is_bigint(compressor)) ||
+            (self.left.is_boolean() && self.right.is_boolean()) ||
+            self.left.equivalent_to(self.right)
+        ) {
+            self.operator = self.operator.substr(0, 2);
+        }
+
+        // XXX: intentionally falling down to the next case
+      case "==":
+      case "!=":
+        // void 0 == x => null == x
+        if (!is_strict_comparison && is_undefined(self.left, compressor)) {
+            self.left = make_node(AST_Null, self.left);
+        // x == void 0 => x == null
+        } else if (!is_strict_comparison && is_undefined(self.right, compressor)) {
+            self.right = make_node(AST_Null, self.right);
+        } else if (compressor.option("typeofs")
+            // "undefined" == typeof x => undefined === x
+            && self.left instanceof AST_String
+            && self.left.value == "undefined"
+            && self.right instanceof AST_UnaryPrefix
+            && self.right.operator == "typeof") {
+            var expr = self.right.expression;
+            if (expr instanceof AST_SymbolRef ? expr.is_declared(compressor)
+                : !(expr instanceof AST_PropAccess && compressor.option("ie8"))) {
+                self.right = expr;
+                self.left = make_void_0(self.left).optimize(compressor);
+                if (self.operator.length == 2) self.operator += "=";
+            }
+        } else if (compressor.option("typeofs")
+            // typeof x === "undefined" => x === undefined
+            && self.left instanceof AST_UnaryPrefix
+            && self.left.operator == "typeof"
+            && self.right instanceof AST_String
+            && self.right.value == "undefined") {
+            var expr = self.left.expression;
+            if (expr instanceof AST_SymbolRef ? expr.is_declared(compressor)
+                : !(expr instanceof AST_PropAccess && compressor.option("ie8"))) {
+                self.left = expr;
+                self.right = make_void_0(self.right).optimize(compressor);
+                if (self.operator.length == 2) self.operator += "=";
+            }
+        } else if (self.left instanceof AST_SymbolRef
+            // obj !== obj => false
+            && self.right instanceof AST_SymbolRef
+            && self.left.definition() === self.right.definition()
+            && is_object(self.left.fixed_value())) {
+            return make_node(self.operator[0] == "=" ? AST_True : AST_False, self);
+        } else if (self.left.is_32_bit_integer(compressor) && self.right.is_32_bit_integer(compressor)) {
+            const not = node => make_node(AST_UnaryPrefix, node, {
+                operator: "!",
+                expression: node
+            });
+            const booleanify = (node, truthy) => {
+                if (truthy) {
+                    return compressor.in_boolean_context()
+                        ? node
+                        : not(not(node));
+                } else {
+                    return not(node);
+                }
+            };
+
+            // The only falsy 32-bit integer is 0
+            if (self.left instanceof AST_Number && self.left.value === 0) {
+                return booleanify(self.right, self.operator[0] === "!");
+            }
+            if (self.right instanceof AST_Number && self.right.value === 0) {
+                return booleanify(self.left, self.operator[0] === "!");
+            }
+
+            // Mask all-bits check
+            // (x & 0xFF) != 0xFF => !(~x & 0xFF)
+            let and_op, x, mask;
+            if (
+                (and_op =
+                    self.left instanceof AST_Binary ? self.left
+                    : self.right instanceof AST_Binary ? self.right : null)
+                && (mask = and_op === self.left ? self.right : self.left)
+                && and_op.operator === "&"
+                && mask instanceof AST_Number
+                && mask.is_32_bit_integer(compressor)
+                && (x =
+                    and_op.left.equivalent_to(mask) ? and_op.right
+                    : and_op.right.equivalent_to(mask) ? and_op.left : null)
+            ) {
+                let optimized = booleanify(make_node(AST_Binary, self, {
+                    operator: "&",
+                    left: mask,
+                    right: make_node(AST_UnaryPrefix, self, {
+                        operator: "~",
+                        expression: x
+                    })
+                }), self.operator[0] === "!");
+
+                return best_of(compressor, optimized, self);
+            }
+        }
+        break;
+      case "&&":
+      case "||":
+        var lhs = self.left;
+        if (lhs.operator == self.operator) {
+            lhs = lhs.right;
+        }
+        if (lhs instanceof AST_Binary
+            && lhs.operator == (self.operator == "&&" ? "!==" : "===")
+            && self.right instanceof AST_Binary
+            && lhs.operator == self.right.operator
+            && (is_undefined(lhs.left, compressor) && self.right.left instanceof AST_Null
+                || lhs.left instanceof AST_Null && is_undefined(self.right.left, compressor))
+            && !lhs.right.has_side_effects(compressor)
+            && lhs.right.equivalent_to(self.right.right)) {
+            var combined = make_node(AST_Binary, self, {
+                operator: lhs.operator.slice(0, -1),
+                left: make_node(AST_Null, self),
+                right: lhs.right
+            });
+            if (lhs !== self.left) {
+                combined = make_node(AST_Binary, self, {
+                    operator: self.operator,
+                    left: self.left.left,
+                    right: combined
+                });
+            }
+            return combined;
+        }
+        break;
+    }
+    if (self.operator == "+" && compressor.in_boolean_context()) {
+        var ll = self.left.evaluate(compressor);
+        var rr = self.right.evaluate(compressor);
+        if (ll && typeof ll == "string") {
+            return make_sequence(self, [
+                self.right,
+                make_node(AST_True, self)
+            ]).optimize(compressor);
+        }
+        if (rr && typeof rr == "string") {
+            return make_sequence(self, [
+                self.left,
+                make_node(AST_True, self)
+            ]).optimize(compressor);
+        }
+    }
+    if (compressor.option("comparisons") && self.is_boolean()) {
+        if (!(compressor.parent() instanceof AST_Binary)
+            || compressor.parent() instanceof AST_Assign) {
+            var negated = make_node(AST_UnaryPrefix, self, {
+                operator: "!",
+                expression: self.negate(compressor, first_in_statement(compressor))
+            });
+            self = best_of(compressor, self, negated);
+        }
+        if (compressor.option("unsafe_comps")) {
+            switch (self.operator) {
+              case "<": reverse(">"); break;
+              case "<=": reverse(">="); break;
+            }
+        }
+    }
+    if (self.operator == "+") {
+        if (self.right instanceof AST_String
+            && self.right.getValue() == ""
+            && self.left.is_string(compressor)) {
+            return self.left;
+        }
+        if (self.left instanceof AST_String
+            && self.left.getValue() == ""
+            && self.right.is_string(compressor)) {
+            return self.right;
+        }
+        if (self.left instanceof AST_Binary
+            && self.left.operator == "+"
+            && self.left.left instanceof AST_String
+            && self.left.left.getValue() == ""
+            && self.right.is_string(compressor)) {
+            self.left = self.left.right;
+            return self;
+        }
+    }
+    if (compressor.option("evaluate")) {
+        switch (self.operator) {
+          case "&&":
+            var ll = has_flag(self.left, TRUTHY)
+                ? true
+                : has_flag(self.left, FALSY)
+                    ? false
+                    : self.left.evaluate(compressor);
+            if (!ll) {
+                return maintain_this_binding(compressor.parent(), compressor.self(), self.left).optimize(compressor);
+            } else if (!(ll instanceof AST_Node)) {
+                return make_sequence(self, [ self.left, self.right ]).optimize(compressor);
+            }
+            var rr = self.right.evaluate(compressor);
+            if (!rr) {
+                if (compressor.in_boolean_context()) {
+                    return make_sequence(self, [
+                        self.left,
+                        make_node(AST_False, self)
+                    ]).optimize(compressor);
+                } else {
+                    set_flag(self, FALSY);
+                }
+            } else if (!(rr instanceof AST_Node)) {
+                var parent = compressor.parent();
+                if (parent.operator == "&&" && parent.left === compressor.self() || compressor.in_boolean_context()) {
+                    return self.left.optimize(compressor);
+                }
+            }
+            // x || false && y ---> x ? y : false
+            if (self.left.operator == "||") {
+                var lr = self.left.right.evaluate(compressor);
+                if (!lr) return make_node(AST_Conditional, self, {
+                    condition: self.left.left,
+                    consequent: self.right,
+                    alternative: self.left.right
+                }).optimize(compressor);
+            }
+            break;
+          case "||":
+            var ll = has_flag(self.left, TRUTHY)
+              ? true
+              : has_flag(self.left, FALSY)
+                ? false
+                : self.left.evaluate(compressor);
+            if (!ll) {
+                return make_sequence(self, [ self.left, self.right ]).optimize(compressor);
+            } else if (!(ll instanceof AST_Node)) {
+                return maintain_this_binding(compressor.parent(), compressor.self(), self.left).optimize(compressor);
+            }
+            var rr = self.right.evaluate(compressor);
+            if (!rr) {
+                var parent = compressor.parent();
+                if (parent.operator == "||" && parent.left === compressor.self() || compressor.in_boolean_context()) {
+                    return self.left.optimize(compressor);
+                }
+            } else if (!(rr instanceof AST_Node)) {
+                if (compressor.in_boolean_context()) {
+                    return make_sequence(self, [
+                        self.left,
+                        make_node(AST_True, self)
+                    ]).optimize(compressor);
+                } else {
+                    set_flag(self, TRUTHY);
+                }
+            }
+            if (self.left.operator == "&&") {
+                var lr = self.left.right.evaluate(compressor);
+                if (lr && !(lr instanceof AST_Node)) return make_node(AST_Conditional, self, {
+                    condition: self.left.left,
+                    consequent: self.left.right,
+                    alternative: self.right
+                }).optimize(compressor);
+            }
+            break;
+          case "??":
+            if (is_nullish(self.left, compressor)) {
+                return self.right;
+            }
+
+            var ll = self.left.evaluate(compressor);
+            if (!(ll instanceof AST_Node)) {
+                // if we know the value for sure we can simply compute right away.
+                return ll == null ? self.right : self.left;
+            }
+
+            if (compressor.in_boolean_context()) {
+                const rr = self.right.evaluate(compressor);
+                if (!(rr instanceof AST_Node) && !rr) {
+                    return self.left;
+                }
+            }
+        }
+        var associative = true;
+        switch (self.operator) {
+          case "+":
+            // (x + "foo") + "bar" => x + "foobar"
+            if (self.right instanceof AST_Constant
+                && self.left instanceof AST_Binary
+                && self.left.operator == "+"
+                && self.left.is_string(compressor)) {
+                var binary = make_node(AST_Binary, self, {
+                    operator: "+",
+                    left: self.left.right,
+                    right: self.right,
+                });
+                var r = binary.optimize(compressor);
+                if (binary !== r) {
+                    self = make_node(AST_Binary, self, {
+                        operator: "+",
+                        left: self.left.left,
+                        right: r
+                    });
+                }
+            }
+            // (x + "foo") + ("bar" + y) => (x + "foobar") + y
+            if (self.left instanceof AST_Binary
+                && self.left.operator == "+"
+                && self.left.is_string(compressor)
+                && self.right instanceof AST_Binary
+                && self.right.operator == "+"
+                && self.right.is_string(compressor)) {
+                var binary = make_node(AST_Binary, self, {
+                    operator: "+",
+                    left: self.left.right,
+                    right: self.right.left,
+                });
+                var m = binary.optimize(compressor);
+                if (binary !== m) {
+                    self = make_node(AST_Binary, self, {
+                        operator: "+",
+                        left: make_node(AST_Binary, self.left, {
+                            operator: "+",
+                            left: self.left.left,
+                            right: m
+                        }),
+                        right: self.right.right
+                    });
+                }
+            }
+            // a + -b => a - b
+            if (self.right instanceof AST_UnaryPrefix
+                && self.right.operator == "-"
+                && self.left.is_number_or_bigint(compressor)) {
+                self = make_node(AST_Binary, self, {
+                    operator: "-",
+                    left: self.left,
+                    right: self.right.expression
+                });
+                break;
+            }
+            // -a + b => b - a
+            if (self.left instanceof AST_UnaryPrefix
+                && self.left.operator == "-"
+                && reversible()
+                && self.right.is_number_or_bigint(compressor)) {
+                self = make_node(AST_Binary, self, {
+                    operator: "-",
+                    left: self.right,
+                    right: self.left.expression
+                });
+                break;
+            }
+            // `foo${bar}baz` + 1 => `foo${bar}baz1`
+            if (self.left instanceof AST_TemplateString) {
+                var l = self.left;
+                var r = self.right.evaluate(compressor);
+                if (r != self.right) {
+                    l.segments[l.segments.length - 1].value += String(r);
+                    return l;
+                }
+            }
+            // 1 + `foo${bar}baz` => `1foo${bar}baz`
+            if (self.right instanceof AST_TemplateString) {
+                var r = self.right;
+                var l = self.left.evaluate(compressor);
+                if (l != self.left) {
+                    r.segments[0].value = String(l) + r.segments[0].value;
+                    return r;
+                }
+            }
+            // `1${bar}2` + `foo${bar}baz` => `1${bar}2foo${bar}baz`
+            if (self.left instanceof AST_TemplateString
+                && self.right instanceof AST_TemplateString) {
+                var l = self.left;
+                var segments = l.segments;
+                var r = self.right;
+                segments[segments.length - 1].value += r.segments[0].value;
+                for (var i = 1; i < r.segments.length; i++) {
+                    segments.push(r.segments[i]);
+                }
+                return l;
+            }
+          case "*":
+            associative = compressor.option("unsafe_math");
+          case "&":
+          case "|":
+          case "^":
+            // a + +b => +b + a
+            if (
+                self.left.is_number_or_bigint(compressor)
+                && self.right.is_number_or_bigint(compressor)
+                && reversible()
+                && !(self.left instanceof AST_Binary
+                    && self.left.operator != self.operator
+                    && PRECEDENCE[self.left.operator] >= PRECEDENCE[self.operator])) {
+                var reversed = make_node(AST_Binary, self, {
+                    operator: self.operator,
+                    left: self.right,
+                    right: self.left
+                });
+                if (self.right instanceof AST_Constant
+                    && !(self.left instanceof AST_Constant)) {
+                    self = best_of(compressor, reversed, self);
+                } else {
+                    self = best_of(compressor, self, reversed);
+                }
+            }
+            if (associative && self.is_number_or_bigint(compressor)) {
+                // a + (b + c) => (a + b) + c
+                if (self.right instanceof AST_Binary
+                    && self.right.operator == self.operator) {
+                    self = make_node(AST_Binary, self, {
+                        operator: self.operator,
+                        left: make_node(AST_Binary, self.left, {
+                            operator: self.operator,
+                            left: self.left,
+                            right: self.right.left,
+                            start: self.left.start,
+                            end: self.right.left.end
+                        }),
+                        right: self.right.right
+                    });
+                }
+                // (n + 2) + 3 => 5 + n
+                // (2 * n) * 3 => 6 + n
+                if (self.right instanceof AST_Constant
+                    && self.left instanceof AST_Binary
+                    && self.left.operator == self.operator) {
+                    if (self.left.left instanceof AST_Constant) {
+                        self = make_node(AST_Binary, self, {
+                            operator: self.operator,
+                            left: make_node(AST_Binary, self.left, {
+                                operator: self.operator,
+                                left: self.left.left,
+                                right: self.right,
+                                start: self.left.left.start,
+                                end: self.right.end
+                            }),
+                            right: self.left.right
+                        });
+                    } else if (self.left.right instanceof AST_Constant) {
+                        self = make_node(AST_Binary, self, {
+                            operator: self.operator,
+                            left: make_node(AST_Binary, self.left, {
+                                operator: self.operator,
+                                left: self.left.right,
+                                right: self.right,
+                                start: self.left.right.start,
+                                end: self.right.end
+                            }),
+                            right: self.left.left
+                        });
+                    }
+                }
+                // (a | 1) | (2 | d) => (3 | a) | b
+                if (self.left instanceof AST_Binary
+                    && self.left.operator == self.operator
+                    && self.left.right instanceof AST_Constant
+                    && self.right instanceof AST_Binary
+                    && self.right.operator == self.operator
+                    && self.right.left instanceof AST_Constant) {
+                    self = make_node(AST_Binary, self, {
+                        operator: self.operator,
+                        left: make_node(AST_Binary, self.left, {
+                            operator: self.operator,
+                            left: make_node(AST_Binary, self.left.left, {
+                                operator: self.operator,
+                                left: self.left.right,
+                                right: self.right.left,
+                                start: self.left.right.start,
+                                end: self.right.left.end
+                            }),
+                            right: self.left.left
+                        }),
+                        right: self.right.right
+                    });
+                }
+            }
+        }
+
+        // bitwise ops
+        if (bitwise_binop.has(self.operator)) {
+            // Use De Morgan's laws
+            // z & (X | y)
+            // => z & X (given y & z === 0)
+            // => z & X | {y & z} (given y & z !== 0)
+            let y, z, x_node, y_node, z_node = self.left;
+            if (
+                self.operator === "&"
+                && self.right instanceof AST_Binary
+                && self.right.operator === "|"
+                && typeof (z = self.left.evaluate(compressor)) === "number"
+            ) {
+                if (typeof (y = self.right.right.evaluate(compressor)) === "number") {
+                    // z & (X | y)
+                    x_node = self.right.left;
+                    y_node = self.right.right;
+                } else if (typeof (y = self.right.left.evaluate(compressor)) === "number") {
+                    // z & (y | X)
+                    x_node = self.right.right;
+                    y_node = self.right.left;
+                }
+
+                if (x_node && y_node) {
+                    if ((y & z) === 0) {
+                        self = make_node(AST_Binary, self, {
+                            operator: self.operator,
+                            left: z_node,
+                            right: x_node
+                        });
+                    } else {
+                        const reordered_ops = make_node(AST_Binary, self, {
+                            operator: "|",
+                            left: make_node(AST_Binary, self, {
+                                operator: "&",
+                                left: x_node,
+                                right: z_node
+                            }),
+                            right: make_node_from_constant(y & z, y_node),
+                        });
+
+                        self = best_of(compressor, self, reordered_ops);
+                    }
+                }
+            }
+
+            // x | x => 0 | x
+            // x & x => 0 | x
+            if (
+                (self.operator === "|" || self.operator === "&")
+                && self.left.equivalent_to(self.right)
+                && !self.left.has_side_effects(compressor)
+                && compressor.in_32_bit_context(true)
+            ) {
+                self.left = make_node(AST_Number, self, { value: 0 });
+                self.operator = "|";
+            }
+
+            // ~x ^ ~y => x ^ y
+            if (
+                self.operator === "^"
+                && self.left instanceof AST_UnaryPrefix
+                && self.left.operator === "~"
+                && self.right instanceof AST_UnaryPrefix
+                && self.right.operator === "~"
+            ) {
+                self = make_node(AST_Binary, self, {
+                    operator: "^",
+                    left: self.left.expression,
+                    right: self.right.expression
+                });
+            }
+
+
+            // Shifts that do nothing
+            // {anything} >> 0 => {anything} | 0
+            // {anything} << 0 => {anything} | 0
+            if (
+                (self.operator === "<<" || self.operator === ">>")
+                && self.right instanceof AST_Number && self.right.value === 0
+            ) {
+                self.operator = "|";
+            }
+
+            // Find useless to-bitwise conversions
+            // {32 bit integer} | 0 => {32 bit integer}
+            // {32 bit integer} ^ 0 => {32 bit integer}
+            const zero_side = self.right instanceof AST_Number && self.right.value === 0 ? self.right
+                : self.left instanceof AST_Number && self.left.value === 0 ? self.left
+                : null;
+            const non_zero_side = zero_side && (zero_side === self.right ? self.left : self.right);
+            if (
+                zero_side
+                && (self.operator === "|" || self.operator === "^")
+                && (non_zero_side.is_32_bit_integer(compressor) || compressor.in_32_bit_context(true))
+            ) {
+                return non_zero_side;
+            }
+
+            // {anything} & 0 => 0
+            if (
+                zero_side
+                && self.operator === "&"
+                && !non_zero_side.has_side_effects(compressor)
+                && non_zero_side.is_32_bit_integer(compressor)
+            ) {
+                return zero_side;
+            }
+
+            // ~0 is all ones, as well as -1.
+            // We can ellide some operations with it.
+            const is_full_mask = (node) =>
+                node instanceof AST_Number && node.value === -1
+                ||
+                    node instanceof AST_UnaryPrefix
+                    && node.operator === "-"
+                    && node.expression instanceof AST_Number
+                    && node.expression.value === 1;
+
+            const full_mask = is_full_mask(self.right) ? self.right
+                : is_full_mask(self.left) ? self.left
+                : null;
+            const other_side = (full_mask === self.right ? self.left : self.right);
+
+            // {32 bit integer} & -1 => {32 bit integer}
+            if (
+                full_mask
+                && self.operator === "&"
+                && (
+                    other_side.is_32_bit_integer(compressor)
+                    || compressor.in_32_bit_context(true)
+                )
+            ) {
+                return other_side;
+            }
+
+            // {anything} ^ -1 => ~{anything}
+            if (
+                full_mask
+                && self.operator === "^"
+                && (
+                    other_side.is_32_bit_integer(compressor)
+                    || compressor.in_32_bit_context(true)
+                )
+            ) {
+                return other_side.bitwise_negate(compressor);
+            }
+        }
+    }
+    // x && (y && z)  ==>  x && y && z
+    // x || (y || z)  ==>  x || y || z
+    // x + ("y" + z)  ==>  x + "y" + z
+    // "x" + (y + "z")==>  "x" + y + "z"
+    if (self.right instanceof AST_Binary
+        && self.right.operator == self.operator
+        && (lazy_op.has(self.operator)
+            || (self.operator == "+"
+                && (self.right.left.is_string(compressor)
+                    || (self.left.is_string(compressor)
+                        && self.right.right.is_string(compressor)))))
+    ) {
+        self.left = make_node(AST_Binary, self.left, {
+            operator : self.operator,
+            left     : self.left.transform(compressor),
+            right    : self.right.left.transform(compressor)
+        });
+        self.right = self.right.right.transform(compressor);
+        return self.transform(compressor);
+    }
+    var ev = self.evaluate(compressor);
+    if (ev !== self) {
+        ev = make_node_from_constant(ev, self).optimize(compressor);
+        return best_of(compressor, ev, self);
+    }
+    return self;
+});
+
+def_optimize(AST_SymbolExport, function(self) {
+    return self;
+});
+
+def_optimize(AST_SymbolRef, function(self, compressor) {
+    if (
+        !compressor.option("ie8")
+        && is_undeclared_ref(self)
+        && !compressor.find_parent(AST_With)
+    ) {
+        switch (self.name) {
+          case "undefined":
+            return make_node(AST_Undefined, self).optimize(compressor);
+          case "NaN":
+            return make_node(AST_NaN, self).optimize(compressor);
+          case "Infinity":
+            return make_node(AST_Infinity, self).optimize(compressor);
+        }
+    }
+
+    if (compressor.option("reduce_vars") && !compressor.is_lhs()) {
+        return inline_into_symbolref(self, compressor);
+    } else {
+        return self;
+    }
+});
+
+function is_atomic(lhs, self) {
+    return lhs instanceof AST_SymbolRef || lhs.TYPE === self.TYPE;
+}
+
+/** Apply the `unsafe_undefined` option: find a variable called `undefined` and turn `self` into a reference to it. */
+function unsafe_undefined_ref(self, compressor) {
+    if (compressor.option("unsafe_undefined")) {
+        var undef = find_variable(compressor, "undefined");
+        if (undef) {
+            var ref = make_node(AST_SymbolRef, self, {
+                name   : "undefined",
+                scope  : undef.scope,
+                thedef : undef
+            });
+            set_flag(ref, UNDEFINED);
+            return ref;
+        }
+    }
+    return null;
+}
+
+def_optimize(AST_Undefined, function(self, compressor) {
+    var symbolref = unsafe_undefined_ref(self, compressor);
+    if (symbolref) return symbolref;
+    var lhs = compressor.is_lhs();
+    if (lhs && is_atomic(lhs, self)) return self;
+    return make_void_0(self);
+});
+
+def_optimize(AST_Infinity, function(self, compressor) {
+    var lhs = compressor.is_lhs();
+    if (lhs && is_atomic(lhs, self)) return self;
+    if (
+        compressor.option("keep_infinity")
+        && !(lhs && !is_atomic(lhs, self))
+        && !find_variable(compressor, "Infinity")
+    ) {
+        return self;
+    }
+    return make_node(AST_Binary, self, {
+        operator: "/",
+        left: make_node(AST_Number, self, {
+            value: 1
+        }),
+        right: make_node(AST_Number, self, {
+            value: 0
+        })
+    });
+});
+
+def_optimize(AST_NaN, function(self, compressor) {
+    var lhs = compressor.is_lhs();
+    if (lhs && !is_atomic(lhs, self)
+        || find_variable(compressor, "NaN")) {
+        return make_node(AST_Binary, self, {
+            operator: "/",
+            left: make_node(AST_Number, self, {
+                value: 0
+            }),
+            right: make_node(AST_Number, self, {
+                value: 0
+            })
+        });
+    }
+    return self;
+});
+
+const ASSIGN_OPS = makePredicate("+ - / * % >> << >>> | ^ &");
+const ASSIGN_OPS_COMMUTATIVE = makePredicate("* | ^ &");
+def_optimize(AST_Assign, function(self, compressor) {
+    if (self.logical) {
+        return self.lift_sequences(compressor);
+    }
+
+    var def;
+    // x = x ---> x
+    if (
+        self.operator === "="
+        && self.left instanceof AST_SymbolRef
+        && self.left.name !== "arguments"
+        && !(def = self.left.definition()).undeclared
+        && self.right.equivalent_to(self.left)
+    ) {
+        return self.right;
+    }
+
+    if (compressor.option("dead_code")
+        && self.left instanceof AST_SymbolRef
+        && (def = self.left.definition()).scope === compressor.find_parent(AST_Lambda)) {
+        var level = 0, node, parent = self;
+        do {
+            node = parent;
+            parent = compressor.parent(level++);
+            if (parent instanceof AST_Exit) {
+                if (in_try(level, parent)) break;
+                if (is_reachable(def.scope, [ def ])) break;
+                if (self.operator == "=") return self.right;
+                def.fixed = false;
+                return make_node(AST_Binary, self, {
+                    operator: self.operator.slice(0, -1),
+                    left: self.left,
+                    right: self.right
+                }).optimize(compressor);
+            }
+        } while (parent instanceof AST_Binary && parent.right === node
+            || parent instanceof AST_Sequence && parent.tail_node() === node);
+    }
+    self = self.lift_sequences(compressor);
+
+    if (self.operator == "=" && self.left instanceof AST_SymbolRef && self.right instanceof AST_Binary) {
+        // x = expr1 OP expr2
+        if (self.right.left instanceof AST_SymbolRef
+            && self.right.left.name == self.left.name
+            && ASSIGN_OPS.has(self.right.operator)) {
+            // x = x - 2  --->  x -= 2
+            self.operator = self.right.operator + "=";
+            self.right = self.right.right;
+        } else if (self.right.right instanceof AST_SymbolRef
+            && self.right.right.name == self.left.name
+            && ASSIGN_OPS_COMMUTATIVE.has(self.right.operator)
+            && !self.right.left.has_side_effects(compressor)) {
+            // x = 2 & x  --->  x &= 2
+            self.operator = self.right.operator + "=";
+            self.right = self.right.left;
+        }
+    }
+    return self;
+
+    function in_try(level, node) {
+        function may_assignment_throw() {
+            const right = self.right;
+            self.right = make_node(AST_Null, right);
+            const may_throw = node.may_throw(compressor);
+            self.right = right;
+
+            return may_throw;
+        }
+
+        var stop_at = self.left.definition().scope.get_defun_scope();
+        var parent;
+        while ((parent = compressor.parent(level++)) !== stop_at) {
+            if (parent instanceof AST_Try) {
+                if (parent.bfinally) return true;
+                if (parent.bcatch && may_assignment_throw()) return true;
+            }
+        }
+    }
+});
+
+def_optimize(AST_DefaultAssign, function(self, compressor) {
+    if (!compressor.option("evaluate")) {
+        return self;
+    }
+    var evaluateRight = self.right.evaluate(compressor);
+
+    // `[x = undefined] = foo` ---> `[x] = foo`
+    // `(arg = undefined) => ...` ---> `(arg) => ...` (unless `keep_fargs`)
+    // `((arg = undefined) => ...)()` ---> `((arg) => ...)()`
+    let lambda, iife;
+    if (evaluateRight === undefined) {
+        if (
+            (lambda = compressor.parent()) instanceof AST_Lambda
+                ? (
+                    compressor.option("keep_fargs") === false
+                    || (iife = compressor.parent(1)).TYPE === "Call"
+                        && iife.expression === lambda
+                )
+                : true
+        ) {
+            self = self.left;
+        }
+    } else if (evaluateRight !== self.right) {
+        evaluateRight = make_node_from_constant(evaluateRight, self.right);
+        self.right = best_of_expression(evaluateRight, self.right);
+    }
+
+    return self;
+});
+
+function is_nullish_check(check, check_subject, compressor) {
+    if (check_subject.may_throw(compressor)) return false;
+
+    let nullish_side;
+
+    // foo == null
+    if (
+        check instanceof AST_Binary
+        && check.operator === "=="
+        // which side is nullish?
+        && (
+            (nullish_side = is_nullish(check.left, compressor) && check.left)
+            || (nullish_side = is_nullish(check.right, compressor) && check.right)
+        )
+        // is the other side the same as the check_subject
+        && (
+            nullish_side === check.left
+                ? check.right
+                : check.left
+        ).equivalent_to(check_subject)
+    ) {
+        return true;
+    }
+
+    // foo === null || foo === undefined
+    if (check instanceof AST_Binary && check.operator === "||") {
+        let null_cmp;
+        let undefined_cmp;
+
+        const find_comparison = cmp => {
+            if (!(
+                cmp instanceof AST_Binary
+                && (cmp.operator === "===" || cmp.operator === "==")
+            )) {
+                return false;
+            }
+
+            let found = 0;
+            let defined_side;
+
+            if (cmp.left instanceof AST_Null) {
+                found++;
+                null_cmp = cmp;
+                defined_side = cmp.right;
+            }
+            if (cmp.right instanceof AST_Null) {
+                found++;
+                null_cmp = cmp;
+                defined_side = cmp.left;
+            }
+            if (is_undefined(cmp.left, compressor)) {
+                found++;
+                undefined_cmp = cmp;
+                defined_side = cmp.right;
+            }
+            if (is_undefined(cmp.right, compressor)) {
+                found++;
+                undefined_cmp = cmp;
+                defined_side = cmp.left;
+            }
+
+            if (found !== 1) {
+                return false;
+            }
+
+            if (!defined_side.equivalent_to(check_subject)) {
+                return false;
+            }
+
+            return true;
+        };
+
+        if (!find_comparison(check.left)) return false;
+        if (!find_comparison(check.right)) return false;
+
+        if (null_cmp && undefined_cmp && null_cmp !== undefined_cmp) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+def_optimize(AST_Conditional, function(self, compressor) {
+    if (!compressor.option("conditionals")) return self;
+    // This looks like lift_sequences(), should probably be under "sequences"
+    if (self.condition instanceof AST_Sequence) {
+        var expressions = self.condition.expressions.slice();
+        self.condition = expressions.pop();
+        expressions.push(self);
+        return make_sequence(self, expressions);
+    }
+    var cond = self.condition.evaluate(compressor);
+    if (cond !== self.condition) {
+        if (cond) {
+            return maintain_this_binding(compressor.parent(), compressor.self(), self.consequent);
+        } else {
+            return maintain_this_binding(compressor.parent(), compressor.self(), self.alternative);
+        }
+    }
+    var negated = cond.negate(compressor, first_in_statement(compressor));
+    if (best_of(compressor, cond, negated) === negated) {
+        self = make_node(AST_Conditional, self, {
+            condition: negated,
+            consequent: self.alternative,
+            alternative: self.consequent
+        });
+    }
+    var condition = self.condition;
+    var consequent = self.consequent;
+    var alternative = self.alternative;
+    // x?x:y --> x||y
+    if (condition instanceof AST_SymbolRef
+        && consequent instanceof AST_SymbolRef
+        && condition.definition() === consequent.definition()) {
+        return make_node(AST_Binary, self, {
+            operator: "||",
+            left: condition,
+            right: alternative
+        });
+    }
+    // if (foo) exp = something; else exp = something_else;
+    //                   |
+    //                   v
+    // exp = foo ? something : something_else;
+    if (
+        consequent instanceof AST_Assign
+        && alternative instanceof AST_Assign
+        && consequent.operator === alternative.operator
+        && consequent.logical === alternative.logical
+        && consequent.left.equivalent_to(alternative.left)
+        && (!self.condition.has_side_effects(compressor)
+            || consequent.operator == "="
+                && !consequent.left.has_side_effects(compressor))
+    ) {
+        return make_node(AST_Assign, self, {
+            operator: consequent.operator,
+            left: consequent.left,
+            logical: consequent.logical,
+            right: make_node(AST_Conditional, self, {
+                condition: self.condition,
+                consequent: consequent.right,
+                alternative: alternative.right
+            })
+        });
+    }
+    // x ? y(a) : y(b) --> y(x ? a : b)
+    var arg_index;
+    if (consequent instanceof AST_Call
+        && alternative.TYPE === consequent.TYPE
+        && consequent.args.length > 0
+        && consequent.args.length == alternative.args.length
+        && consequent.expression.equivalent_to(alternative.expression)
+        && !self.condition.has_side_effects(compressor)
+        && !consequent.expression.has_side_effects(compressor)
+        && typeof (arg_index = single_arg_diff()) == "number") {
+        var node = consequent.clone();
+        node.args[arg_index] = make_node(AST_Conditional, self, {
+            condition: self.condition,
+            consequent: consequent.args[arg_index],
+            alternative: alternative.args[arg_index]
+        });
+        return node;
+    }
+    // a ? b : c ? b : d --> (a || c) ? b : d
+    if (alternative instanceof AST_Conditional
+        && consequent.equivalent_to(alternative.consequent)) {
+        return make_node(AST_Conditional, self, {
+            condition: make_node(AST_Binary, self, {
+                operator: "||",
+                left: condition,
+                right: alternative.condition
+            }),
+            consequent: consequent,
+            alternative: alternative.alternative
+        }).optimize(compressor);
+    }
+
+    // a == null ? b : a -> a ?? b
+    if (
+        compressor.option("ecma") >= 2020 &&
+        is_nullish_check(condition, alternative, compressor)
+    ) {
+        return make_node(AST_Binary, self, {
+            operator: "??",
+            left: alternative,
+            right: consequent
+        }).optimize(compressor);
+    }
+
+    // a ? b : (c, b) --> (a || c), b
+    if (alternative instanceof AST_Sequence
+        && consequent.equivalent_to(alternative.expressions[alternative.expressions.length - 1])) {
+        return make_sequence(self, [
+            make_node(AST_Binary, self, {
+                operator: "||",
+                left: condition,
+                right: make_sequence(self, alternative.expressions.slice(0, -1))
+            }),
+            consequent
+        ]).optimize(compressor);
+    }
+    // a ? b : (c && b) --> (a || c) && b
+    if (alternative instanceof AST_Binary
+        && alternative.operator == "&&"
+        && consequent.equivalent_to(alternative.right)) {
+        return make_node(AST_Binary, self, {
+            operator: "&&",
+            left: make_node(AST_Binary, self, {
+                operator: "||",
+                left: condition,
+                right: alternative.left
+            }),
+            right: consequent
+        }).optimize(compressor);
+    }
+    // x?y?z:a:a --> x&&y?z:a
+    if (consequent instanceof AST_Conditional
+        && consequent.alternative.equivalent_to(alternative)) {
+        return make_node(AST_Conditional, self, {
+            condition: make_node(AST_Binary, self, {
+                left: self.condition,
+                operator: "&&",
+                right: consequent.condition
+            }),
+            consequent: consequent.consequent,
+            alternative: alternative
+        });
+    }
+    // x ? y : y --> x, y
+    if (consequent.equivalent_to(alternative)) {
+        return make_sequence(self, [
+            self.condition,
+            consequent
+        ]).optimize(compressor);
+    }
+    // x ? y || z : z --> x && y || z
+    if (consequent instanceof AST_Binary
+        && consequent.operator == "||"
+        && consequent.right.equivalent_to(alternative)) {
+        return make_node(AST_Binary, self, {
+            operator: "||",
+            left: make_node(AST_Binary, self, {
+                operator: "&&",
+                left: self.condition,
+                right: consequent.left
+            }),
+            right: alternative
+        }).optimize(compressor);
+    }
+
+    const in_bool = compressor.in_boolean_context();
+    if (is_true(self.consequent)) {
+        if (is_false(self.alternative)) {
+            // c ? true : false ---> !!c
+            return booleanize(self.condition);
+        }
+        // c ? true : x ---> !!c || x
+        return make_node(AST_Binary, self, {
+            operator: "||",
+            left: booleanize(self.condition),
+            right: self.alternative
+        });
+    }
+    if (is_false(self.consequent)) {
+        if (is_true(self.alternative)) {
+            // c ? false : true ---> !c
+            return booleanize(self.condition.negate(compressor));
+        }
+        // c ? false : x ---> !c && x
+        return make_node(AST_Binary, self, {
+            operator: "&&",
+            left: booleanize(self.condition.negate(compressor)),
+            right: self.alternative
+        });
+    }
+    if (is_true(self.alternative)) {
+        // c ? x : true ---> !c || x
+        return make_node(AST_Binary, self, {
+            operator: "||",
+            left: booleanize(self.condition.negate(compressor)),
+            right: self.consequent
+        });
+    }
+    if (is_false(self.alternative)) {
+        // c ? x : false ---> !!c && x
+        return make_node(AST_Binary, self, {
+            operator: "&&",
+            left: booleanize(self.condition),
+            right: self.consequent
+        });
+    }
+
+    return self;
+
+    function booleanize(node) {
+        if (node.is_boolean()) return node;
+        // !!expression
+        return make_node(AST_UnaryPrefix, node, {
+            operator: "!",
+            expression: node.negate(compressor)
+        });
+    }
+
+    // AST_True or !0
+    function is_true(node) {
+        return node instanceof AST_True
+            || in_bool
+                && node instanceof AST_Constant
+                && node.getValue()
+            || (node instanceof AST_UnaryPrefix
+                && node.operator == "!"
+                && node.expression instanceof AST_Constant
+                && !node.expression.getValue());
+    }
+    // AST_False or !1
+    function is_false(node) {
+        return node instanceof AST_False
+            || in_bool
+                && node instanceof AST_Constant
+                && !node.getValue()
+            || (node instanceof AST_UnaryPrefix
+                && node.operator == "!"
+                && node.expression instanceof AST_Constant
+                && node.expression.getValue());
+    }
+
+    function single_arg_diff() {
+        var a = consequent.args;
+        var b = alternative.args;
+        for (var i = 0, len = a.length; i < len; i++) {
+            if (a[i] instanceof AST_Expansion) return;
+            if (!a[i].equivalent_to(b[i])) {
+                if (b[i] instanceof AST_Expansion) return;
+                for (var j = i + 1; j < len; j++) {
+                    if (a[j] instanceof AST_Expansion) return;
+                    if (!a[j].equivalent_to(b[j])) return;
+                }
+                return i;
+            }
+        }
+    }
+});
+
+def_optimize(AST_Boolean, function(self, compressor) {
+    if (compressor.in_boolean_context()) return make_node(AST_Number, self, {
+        value: +self.value
+    });
+    var p = compressor.parent();
+    if (compressor.option("booleans_as_integers")) {
+        if (p instanceof AST_Binary && (p.operator == "===" || p.operator == "!==")) {
+            p.operator = p.operator.replace(/=$/, "");
+        }
+        return make_node(AST_Number, self, {
+            value: +self.value
+        });
+    }
+    if (compressor.option("booleans")) {
+        if (p instanceof AST_Binary && (p.operator == "=="
+                                        || p.operator == "!=")) {
+            return make_node(AST_Number, self, {
+                value: +self.value
+            });
+        }
+        return make_node(AST_UnaryPrefix, self, {
+            operator: "!",
+            expression: make_node(AST_Number, self, {
+                value: 1 - self.value
+            })
+        });
+    }
+    return self;
+});
+
+function safe_to_flatten(value, compressor) {
+    if (value instanceof AST_SymbolRef) {
+        value = value.fixed_value();
+    }
+    if (!value) return false;
+    if (!(value instanceof AST_Lambda || value instanceof AST_Class)) return true;
+    if (!(value instanceof AST_Lambda && value.contains_this())) return true;
+    return compressor.parent() instanceof AST_New;
+}
+
+AST_PropAccess.DEFMETHOD("flatten_object", function(key, compressor) {
+    if (!compressor.option("properties")) return;
+    if (key === "__proto__") return;
+    if (this instanceof AST_DotHash) return;
+
+    var arrows = compressor.option("unsafe_arrows") && compressor.option("ecma") >= 2015;
+    var expr = this.expression;
+    if (expr instanceof AST_Object) {
+        var props = expr.properties;
+
+        for (var i = props.length; --i >= 0;) {
+            var prop = props[i];
+
+            if ("" + (prop instanceof AST_ConciseMethod ? prop.key.name : prop.key) == key) {
+                const all_props_flattenable = props.every((p) =>
+                    (p instanceof AST_ObjectKeyVal
+                        || arrows && p instanceof AST_ConciseMethod && !p.value.is_generator
+                    )
+                    && !p.computed_key()
+                );
+
+                if (!all_props_flattenable) return;
+                if (!safe_to_flatten(prop.value, compressor)) return;
+
+                return make_node(AST_Sub, this, {
+                    expression: make_node(AST_Array, expr, {
+                        elements: props.map(function(prop) {
+                            var v = prop.value;
+                            if (v instanceof AST_Accessor) {
+                                v = make_node(AST_Function, v, v);
+                            }
+
+                            var k = prop.key;
+                            if (k instanceof AST_Node && !(k instanceof AST_SymbolMethod)) {
+                                return make_sequence(prop, [ k, v ]);
+                            }
+
+                            return v;
+                        })
+                    }),
+                    property: make_node(AST_Number, this, {
+                        value: i
+                    })
+                });
+            }
+        }
+    }
+});
+
+def_optimize(AST_Sub, function(self, compressor) {
+    var expr = self.expression;
+    var prop = self.property;
+    if (compressor.option("properties")) {
+        var key = prop.evaluate(compressor);
+        if (key !== prop) {
+            if (typeof key == "string") {
+                if (key == "undefined") {
+                    key = undefined;
+                } else {
+                    var value = parseFloat(key);
+                    if (value.toString() == key) {
+                        key = value;
+                    }
+                }
+            }
+            prop = self.property = best_of_expression(
+                prop,
+                make_node_from_constant(key, prop).transform(compressor)
+            );
+            var property = "" + key;
+            if (is_basic_identifier_string(property)
+                && property.length <= prop.size() + 1) {
+                return make_node(AST_Dot, self, {
+                    expression: expr,
+                    optional: self.optional,
+                    property: property,
+                    quote: prop.quote,
+                }).optimize(compressor);
+            }
+        }
+    }
+    var fn;
+    OPT_ARGUMENTS: if (compressor.option("arguments")
+        && expr instanceof AST_SymbolRef
+        && expr.name == "arguments"
+        && expr.definition().orig.length == 1
+        && (fn = expr.scope) instanceof AST_Lambda
+        && fn.uses_arguments
+        && !(fn instanceof AST_Arrow)
+        && prop instanceof AST_Number) {
+        var index = prop.getValue();
+        var params = new Set();
+        var argnames = fn.argnames;
+        for (var n = 0; n < argnames.length; n++) {
+            if (!(argnames[n] instanceof AST_SymbolFunarg)) {
+                break OPT_ARGUMENTS; // destructuring parameter - bail
+            }
+            var param = argnames[n].name;
+            if (params.has(param)) {
+                break OPT_ARGUMENTS; // duplicate parameter - bail
+            }
+            params.add(param);
+        }
+        var argname = fn.argnames[index];
+        if (argname && compressor.has_directive("use strict")) {
+            var def = argname.definition();
+            if (!compressor.option("reduce_vars") || def.assignments || def.orig.length > 1) {
+                argname = null;
+            }
+        } else if (!argname && !compressor.option("keep_fargs") && index < fn.argnames.length + 5) {
+            while (index >= fn.argnames.length) {
+                argname = fn.create_symbol(AST_SymbolFunarg, {
+                    source: fn,
+                    scope: fn,
+                    tentative_name: "argument_" + fn.argnames.length,
+                });
+                fn.argnames.push(argname);
+            }
+        }
+        if (argname) {
+            var sym = make_node(AST_SymbolRef, self, argname);
+            sym.reference({});
+            clear_flag(argname, UNUSED);
+            return sym;
+        }
+    }
+    if (compressor.is_lhs()) return self;
+    if (key !== prop) {
+        var sub = self.flatten_object(property, compressor);
+        if (sub) {
+            expr = self.expression = sub.expression;
+            prop = self.property = sub.property;
+        }
+    }
+    if (compressor.option("properties") && compressor.option("side_effects")
+        && prop instanceof AST_Number && expr instanceof AST_Array) {
+        var index = prop.getValue();
+        var elements = expr.elements;
+        var retValue = elements[index];
+        FLATTEN: if (safe_to_flatten(retValue, compressor)) {
+            var flatten = true;
+            var values = [];
+            for (var i = elements.length; --i > index;) {
+                var value = elements[i].drop_side_effect_free(compressor);
+                if (value) {
+                    values.unshift(value);
+                    if (flatten && value.has_side_effects(compressor)) flatten = false;
+                }
+            }
+            if (retValue instanceof AST_Expansion) break FLATTEN;
+            retValue = retValue instanceof AST_Hole ? make_void_0(retValue) : retValue;
+            if (!flatten) values.unshift(retValue);
+            while (--i >= 0) {
+                var value = elements[i];
+                if (value instanceof AST_Expansion) break FLATTEN;
+                value = value.drop_side_effect_free(compressor);
+                if (value) values.unshift(value);
+                else index--;
+            }
+            if (flatten) {
+                values.push(retValue);
+                return make_sequence(self, values).optimize(compressor);
+            } else return make_node(AST_Sub, self, {
+                expression: make_node(AST_Array, expr, {
+                    elements: values
+                }),
+                property: make_node(AST_Number, prop, {
+                    value: index
+                })
+            });
+        }
+    }
+    var ev = self.evaluate(compressor);
+    if (ev !== self) {
+        ev = make_node_from_constant(ev, self).optimize(compressor);
+        return best_of(compressor, ev, self);
+    }
+    return self;
+});
+
+def_optimize(AST_Chain, function (self, compressor) {
+    if (is_nullish(self.expression, compressor)) {
+        let parent = compressor.parent();
+        // It's valid to delete a nullish optional chain, but if we optimized
+        // this to `delete undefined` then it would appear to be a syntax error
+        // when we try to optimize the delete. Thankfully, `delete 0` is fine.
+        if (parent instanceof AST_UnaryPrefix && parent.operator === "delete") {
+            return make_node_from_constant(0, self);
+        }
+        return make_void_0(self).optimize(compressor);
+    }
+    if (
+        self.expression instanceof AST_PropAccess
+        || self.expression instanceof AST_Call
+    ) {
+        return self;
+    } else {
+        // Keep the AST valid, in case the child swapped itself
+        return self.expression;
+    }
+});
+
+def_optimize(AST_Dot, function(self, compressor) {
+    const parent = compressor.parent();
+    if (compressor.is_lhs()) return self;
+    if (compressor.option("unsafe_proto")
+        && self.expression instanceof AST_Dot
+        && self.expression.property == "prototype") {
+        var exp = self.expression.expression;
+        if (is_undeclared_ref(exp)) switch (exp.name) {
+          case "Array":
+            self.expression = make_node(AST_Array, self.expression, {
+                elements: []
+            });
+            break;
+          case "Function":
+            self.expression = make_empty_function(self.expression);
+            break;
+          case "Number":
+            self.expression = make_node(AST_Number, self.expression, {
+                value: 0
+            });
+            break;
+          case "Object":
+            self.expression = make_node(AST_Object, self.expression, {
+                properties: []
+            });
+            break;
+          case "RegExp":
+            self.expression = make_node(AST_RegExp, self.expression, {
+                value: { source: "t", flags: "" }
+            });
+            break;
+          case "String":
+            self.expression = make_node(AST_String, self.expression, {
+                value: ""
+            });
+            break;
+        }
+    }
+    if (!(parent instanceof AST_Call) || !has_annotation(parent, _NOINLINE)) {
+        const sub = self.flatten_object(self.property, compressor);
+        if (sub) return sub.optimize(compressor);
+    }
+
+    if (self.expression instanceof AST_PropAccess
+        && parent instanceof AST_PropAccess) {
+        return self;
+    }
+
+    let ev = self.evaluate(compressor);
+    if (ev !== self) {
+        ev = make_node_from_constant(ev, self).optimize(compressor);
+        return best_of(compressor, ev, self);
+    }
+    return self;
+});
+
+function literals_in_boolean_context(self, compressor) {
+    if (compressor.in_boolean_context()) {
+        return best_of(compressor, self, make_sequence(self, [
+            self,
+            make_node(AST_True, self)
+        ]).optimize(compressor));
+    }
+    return self;
+}
+
+function inline_array_like_spread(elements) {
+    for (var i = 0; i < elements.length; i++) {
+        var el = elements[i];
+        if (el instanceof AST_Expansion) {
+            var expr = el.expression;
+            if (
+                expr instanceof AST_Array
+                && !expr.elements.some(elm => elm instanceof AST_Hole)
+            ) {
+                elements.splice(i, 1, ...expr.elements);
+                // Step back one, as the element at i is now new.
+                i--;
+            }
+            // In array-like spread, spreading a non-iterable value is TypeError.
+            // We therefore can’t optimize anything else, unlike with object spread.
+        }
+    }
+}
+
+def_optimize(AST_Array, function(self, compressor) {
+    var optimized = literals_in_boolean_context(self, compressor);
+    if (optimized !== self) {
+        return optimized;
+    }
+    inline_array_like_spread(self.elements);
+    return self;
+});
+
+function inline_object_prop_spread(props) {
+    for (var i = 0; i < props.length; i++) {
+        var prop = props[i];
+        if (prop instanceof AST_Expansion) {
+            const expr = prop.expression;
+            if (
+                expr instanceof AST_Object
+                && expr.properties.every(prop => prop instanceof AST_ObjectKeyVal)
+            ) {
+                props.splice(i, 1, ...expr.properties);
+                // Step back one, as the property at i is now new.
+                i--;
+            } else if ((
+                    // `expr.is_constant()` returns `false` for `AST_RegExp`, so need both.
+                    expr instanceof AST_Constant
+                    || expr.is_constant()
+                ) && !(expr instanceof AST_String)) {
+                // Unlike array-like spread, in object spread, spreading a
+                // non-iterable value silently does nothing; it is thus safe
+                // to remove. AST_String is the only iterable constant.
+                props.splice(i, 1);
+                i--;
+            }
+        }
+    }
+}
+
+def_optimize(AST_Object, function(self, compressor) {
+    var optimized = literals_in_boolean_context(self, compressor);
+    if (optimized !== self) {
+        return optimized;
+    }
+    inline_object_prop_spread(self.properties);
+    return self;
+});
+
+def_optimize(AST_RegExp, literals_in_boolean_context);
+
+def_optimize(AST_Return, function(self, compressor) {
+    if (self.value && is_undefined(self.value, compressor)) {
+        self.value = null;
+    }
+    return self;
+});
+
+def_optimize(AST_Arrow, opt_AST_Lambda);
+
+def_optimize(AST_Function, function(self, compressor) {
+    self = opt_AST_Lambda(self, compressor);
+    if (compressor.option("unsafe_arrows")
+        && compressor.option("ecma") >= 2015
+        && !self.name
+        && !self.is_generator
+        && !self.uses_arguments
+        && !self.pinned()) {
+        const uses_this = walk(self, node => {
+            if (node instanceof AST_This) return walk_abort;
+        });
+        if (!uses_this) return make_node(AST_Arrow, self, self).optimize(compressor);
+    }
+    return self;
+});
+
+def_optimize(AST_Class, function(self) {
+    for (let i = 0; i < self.properties.length; i++) {
+        const prop = self.properties[i];
+        if (prop instanceof AST_ClassStaticBlock && prop.body.length == 0) {
+            self.properties.splice(i, 1);
+            i--;
+        }
+    }
+
+    return self;
+});
+
+def_optimize(AST_ClassStaticBlock, function(self, compressor) {
+    tighten_body(self.body, compressor);
+    return self;
+});
+
+def_optimize(AST_Yield, function(self, compressor) {
+    if (self.expression && !self.is_star && is_undefined(self.expression, compressor)) {
+        self.expression = null;
+    }
+    return self;
+});
+
+def_optimize(AST_TemplateString, function(self, compressor) {
+    if (
+        !compressor.option("evaluate")
+        || compressor.parent() instanceof AST_PrefixedTemplateString
+    ) {
+        return self;
+    }
+
+    var segments = [];
+    for (var i = 0; i < self.segments.length; i++) {
+        var segment = self.segments[i];
+        if (segment instanceof AST_Node) {
+            var result = segment.evaluate(compressor);
+            // Evaluate to constant value
+            // Constant value shorter than ${segment}
+            if (result !== segment && (result + "").length <= segment.size() + "${}".length) {
+                // There should always be a previous and next segment if segment is a node
+                segments[segments.length - 1].value = segments[segments.length - 1].value + result + self.segments[++i].value;
+                continue;
+            }
+            // `before ${`innerBefore ${any} innerAfter`} after` => `before innerBefore ${any} innerAfter after`
+            // TODO:
+            // `before ${'test' + foo} after` => `before innerBefore ${any} innerAfter after`
+            // `before ${foo + 'test} after` => `before innerBefore ${any} innerAfter after`
+            if (segment instanceof AST_TemplateString) {
+                var inners = segment.segments;
+                segments[segments.length - 1].value += inners[0].value;
+                for (var j = 1; j < inners.length; j++) {
+                    segment = inners[j];
+                    segments.push(segment);
+                }
+                continue;
+            }
+        }
+        segments.push(segment);
+    }
+    self.segments = segments;
+
+    // `foo` => "foo"
+    if (segments.length == 1) {
+        return make_node(AST_String, self, segments[0]);
+    }
+
+    if (
+        segments.length === 3
+        && segments[1] instanceof AST_Node
+        && (
+            segments[1].is_string(compressor)
+            || segments[1].is_number_or_bigint(compressor)
+            || is_nullish(segments[1], compressor)
+            || compressor.option("unsafe")
+        )
+    ) {
+        // `foo${bar}` => "foo" + bar
+        if (segments[2].value === "") {
+            return make_node(AST_Binary, self, {
+                operator: "+",
+                left: make_node(AST_String, self, {
+                    value: segments[0].value,
+                }),
+                right: segments[1],
+            });
+        }
+        // `${bar}baz` => bar + "baz"
+        if (segments[0].value === "") {
+            return make_node(AST_Binary, self, {
+                operator: "+",
+                left: segments[1],
+                right: make_node(AST_String, self, {
+                    value: segments[2].value,
+                }),
+            });
+        }
+    }
+    return self;
+});
+
+def_optimize(AST_PrefixedTemplateString, function(self) {
+    return self;
+});
+
+// ["p"]:1 ---> p:1
+// [42]:1 ---> 42:1
+function lift_key(self, compressor) {
+    if (!compressor.option("computed_props")) return self;
+    // save a comparison in the typical case
+    if (!(self.key instanceof AST_Constant)) return self;
+    // allow certain acceptable props as not all AST_Constants are true constants
+    if (self.key instanceof AST_String || self.key instanceof AST_Number) {
+        const key = self.key.value.toString();
+
+        if (key === "__proto__") return self;
+        if (key == "constructor"
+            && compressor.parent() instanceof AST_Class) return self;
+        if (self instanceof AST_ObjectKeyVal) {
+            self.quote = self.key.quote;
+            self.key = key;
+        } else if (self instanceof AST_ClassProperty) {
+            self.quote = self.key.quote;
+            self.key = make_node(AST_SymbolClassProperty, self.key, {
+                name: key,
+            });
+        } else {
+            self.quote = self.key.quote;
+            self.key = make_node(AST_SymbolMethod, self.key, {
+                name: key,
+            });
+        }
+    }
+    return self;
+}
+
+def_optimize(AST_ObjectProperty, lift_key);
+
+def_optimize(AST_ConciseMethod, function(self, compressor) {
+    lift_key(self, compressor);
+    // p(){return x;} ---> p:()=>x
+    if (compressor.option("arrows")
+        && compressor.parent() instanceof AST_Object
+        && !self.value.is_generator
+        && !self.value.uses_arguments
+        && !self.value.pinned()
+        && self.value.body.length == 1
+        && self.value.body[0] instanceof AST_Return
+        && self.value.body[0].value
+        && !self.value.contains_this()) {
+        var arrow = make_node(AST_Arrow, self.value, self.value);
+        arrow.async = self.value.async;
+        arrow.is_generator = self.value.is_generator;
+        return make_node(AST_ObjectKeyVal, self, {
+            key: self.key instanceof AST_SymbolMethod ? self.key.name : self.key,
+            value: arrow,
+            quote: self.quote,
+        });
+    }
+    return self;
+});
+
+def_optimize(AST_ObjectKeyVal, function(self, compressor) {
+    lift_key(self, compressor);
+    // p:function(){} ---> p(){}
+    // p:function*(){} ---> *p(){}
+    // p:async function(){} ---> async p(){}
+    // p:()=>{} ---> p(){}
+    // p:async()=>{} ---> async p(){}
+    var unsafe_methods = compressor.option("unsafe_methods");
+    if (unsafe_methods
+        && compressor.option("ecma") >= 2015
+        && (!(unsafe_methods instanceof RegExp) || unsafe_methods.test(self.key + ""))) {
+        var key = self.key;
+        var value = self.value;
+        var is_arrow_with_block = value instanceof AST_Arrow
+            && Array.isArray(value.body)
+            && !value.contains_this();
+        if ((is_arrow_with_block || value instanceof AST_Function) && !value.name) {
+            return make_node(AST_ConciseMethod, self, {
+                key: key instanceof AST_Node ? key : make_node(AST_SymbolMethod, self, {
+                    name: key,
+                }),
+                value: make_node(AST_Accessor, value, value),
+                quote: self.quote,
+            });
+        }
+    }
+    return self;
+});
+
+def_optimize(AST_Destructuring, function(self, compressor) {
+    if (compressor.option("pure_getters") == true
+        && compressor.option("unused")
+        && !self.is_array
+        && Array.isArray(self.names)
+        && !is_destructuring_export_decl(compressor)
+        && !(self.names[self.names.length - 1] instanceof AST_Expansion)) {
+        var keep = [];
+        for (var i = 0; i < self.names.length; i++) {
+            var elem = self.names[i];
+            if (!(elem instanceof AST_ObjectKeyVal
+                && typeof elem.key == "string"
+                && elem.value instanceof AST_SymbolDeclaration
+                && !should_retain(compressor, elem.value.definition()))) {
+                keep.push(elem);
+            }
+        }
+        if (keep.length != self.names.length) {
+            self.names = keep;
+        }
+    }
+    return self;
+
+    function is_destructuring_export_decl(compressor) {
+        var ancestors = [/^VarDef$/, /^(Const|Let|Var)$/, /^Export$/];
+        for (var a = 0, p = 0, len = ancestors.length; a < len; p++) {
+            var parent = compressor.parent(p);
+            if (!parent) return false;
+            if (a === 0 && parent.TYPE == "Destructuring") continue;
+            if (!ancestors[a].test(parent.TYPE)) {
+                return false;
+            }
+            a++;
+        }
+        return true;
+    }
+
+    function should_retain(compressor, def) {
+        if (def.references.length) return true;
+        if (!def.global) return false;
+        if (compressor.toplevel.vars) {
+            if (compressor.top_retain) {
+                return compressor.top_retain(def);
+            }
+            return false;
+        }
+        return true;
+    }
+});
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+// a small wrapper around source-map and @jridgewell/source-map
+function* SourceMap(options) {
+    options = defaults(options, {
+        file : null,
+        root : null,
+        orig : null,
+        files: {},
+    });
+
+    var orig_map;
+    var generator = new sourceMap.SourceMapGenerator({
+        file       : options.file,
+        sourceRoot : options.root
+    });
+
+    let sourcesContent = {__proto__: null};
+    let files = options.files;
+    for (var name in files) if (HOP(files, name)) {
+        sourcesContent[name] = files[name];
+    }
+    if (options.orig) {
+        // We support both @jridgewell/source-map (which has a sync
+        // SourceMapConsumer) and source-map (which has an async
+        // SourceMapConsumer).
+        orig_map = yield new sourceMap.SourceMapConsumer(options.orig);
+        if (orig_map.sourcesContent) {
+            orig_map.sources.forEach(function(source, i) {
+                var content = orig_map.sourcesContent[i];
+                if (content) {
+                    sourcesContent[source] = content;
+                }
+            });
+        }
+    }
+
+    function add(source, gen_line, gen_col, orig_line, orig_col, name) {
+        let generatedPos = { line: gen_line, column: gen_col };
+
+        if (orig_map) {
+            var info = orig_map.originalPositionFor({
+                line: orig_line,
+                column: orig_col
+            });
+            if (info.source === null) {
+                generator.addMapping({
+                    generated: generatedPos,
+                    original: null,
+                    source: null,
+                    name: null
+                });
+                return;
+            }
+            source = info.source;
+            orig_line = info.line;
+            orig_col = info.column;
+            name = info.name || name;
+        }
+        generator.addMapping({
+            generated : generatedPos,
+            original  : { line: orig_line, column: orig_col },
+            source    : source,
+            name      : name
+        });
+        generator.setSourceContent(source, sourcesContent[source]);
+    }
+
+    function clean(map) {
+        const allNull = map.sourcesContent && map.sourcesContent.every(c => c == null);
+        if (allNull) delete map.sourcesContent;
+        if (map.file === undefined) delete map.file;
+        if (map.sourceRoot === undefined) delete map.sourceRoot;
+        return map;
+    }
+
+    function getDecoded() {
+        if (!generator.toDecodedMap) return null;
+        return clean(generator.toDecodedMap());
+    }
+
+    function getEncoded() {
+        return clean(generator.toJSON());
+    }
+
+    function destroy() {
+        // @jridgewell/source-map's SourceMapConsumer does not need to be
+        // manually freed.
+        if (orig_map && orig_map.destroy) orig_map.destroy();
+    }
+
+    return {
+        add,
+        getDecoded,
+        getEncoded,
+        destroy,
+    };
+}
+
+var domprops = [
+    "$&",
+    "$'",
+    "$*",
+    "$+",
+    "$1",
+    "$2",
+    "$3",
+    "$4",
+    "$5",
+    "$6",
+    "$7",
+    "$8",
+    "$9",
+    "$_",
+    "$`",
+    "$input",
+    "-moz-animation",
+    "-moz-animation-delay",
+    "-moz-animation-direction",
+    "-moz-animation-duration",
+    "-moz-animation-fill-mode",
+    "-moz-animation-iteration-count",
+    "-moz-animation-name",
+    "-moz-animation-play-state",
+    "-moz-animation-timing-function",
+    "-moz-appearance",
+    "-moz-backface-visibility",
+    "-moz-border-end",
+    "-moz-border-end-color",
+    "-moz-border-end-style",
+    "-moz-border-end-width",
+    "-moz-border-image",
+    "-moz-border-start",
+    "-moz-border-start-color",
+    "-moz-border-start-style",
+    "-moz-border-start-width",
+    "-moz-box-align",
+    "-moz-box-direction",
+    "-moz-box-flex",
+    "-moz-box-ordinal-group",
+    "-moz-box-orient",
+    "-moz-box-pack",
+    "-moz-box-sizing",
+    "-moz-float-edge",
+    "-moz-font-feature-settings",
+    "-moz-font-language-override",
+    "-moz-force-broken-image-icon",
+    "-moz-hyphens",
+    "-moz-image-region",
+    "-moz-margin-end",
+    "-moz-margin-start",
+    "-moz-orient",
+    "-moz-osx-font-smoothing",
+    "-moz-outline-radius",
+    "-moz-outline-radius-bottomleft",
+    "-moz-outline-radius-bottomright",
+    "-moz-outline-radius-topleft",
+    "-moz-outline-radius-topright",
+    "-moz-padding-end",
+    "-moz-padding-start",
+    "-moz-perspective",
+    "-moz-perspective-origin",
+    "-moz-tab-size",
+    "-moz-text-size-adjust",
+    "-moz-transform",
+    "-moz-transform-origin",
+    "-moz-transform-style",
+    "-moz-transition",
+    "-moz-transition-delay",
+    "-moz-transition-duration",
+    "-moz-transition-property",
+    "-moz-transition-timing-function",
+    "-moz-user-focus",
+    "-moz-user-input",
+    "-moz-user-modify",
+    "-moz-user-select",
+    "-moz-window-dragging",
+    "-webkit-align-content",
+    "-webkit-align-items",
+    "-webkit-align-self",
+    "-webkit-animation",
+    "-webkit-animation-delay",
+    "-webkit-animation-direction",
+    "-webkit-animation-duration",
+    "-webkit-animation-fill-mode",
+    "-webkit-animation-iteration-count",
+    "-webkit-animation-name",
+    "-webkit-animation-play-state",
+    "-webkit-animation-timing-function",
+    "-webkit-appearance",
+    "-webkit-backface-visibility",
+    "-webkit-background-clip",
+    "-webkit-background-origin",
+    "-webkit-background-size",
+    "-webkit-border-bottom-left-radius",
+    "-webkit-border-bottom-right-radius",
+    "-webkit-border-image",
+    "-webkit-border-radius",
+    "-webkit-border-top-left-radius",
+    "-webkit-border-top-right-radius",
+    "-webkit-box-align",
+    "-webkit-box-direction",
+    "-webkit-box-flex",
+    "-webkit-box-ordinal-group",
+    "-webkit-box-orient",
+    "-webkit-box-pack",
+    "-webkit-box-shadow",
+    "-webkit-box-sizing",
+    "-webkit-clip-path",
+    "-webkit-filter",
+    "-webkit-flex",
+    "-webkit-flex-basis",
+    "-webkit-flex-direction",
+    "-webkit-flex-flow",
+    "-webkit-flex-grow",
+    "-webkit-flex-shrink",
+    "-webkit-flex-wrap",
+    "-webkit-font-feature-settings",
+    "-webkit-justify-content",
+    "-webkit-line-clamp",
+    "-webkit-mask",
+    "-webkit-mask-clip",
+    "-webkit-mask-composite",
+    "-webkit-mask-image",
+    "-webkit-mask-origin",
+    "-webkit-mask-position",
+    "-webkit-mask-position-x",
+    "-webkit-mask-position-y",
+    "-webkit-mask-repeat",
+    "-webkit-mask-size",
+    "-webkit-order",
+    "-webkit-perspective",
+    "-webkit-perspective-origin",
+    "-webkit-text-fill-color",
+    "-webkit-text-security",
+    "-webkit-text-size-adjust",
+    "-webkit-text-stroke",
+    "-webkit-text-stroke-color",
+    "-webkit-text-stroke-width",
+    "-webkit-transform",
+    "-webkit-transform-origin",
+    "-webkit-transform-style",
+    "-webkit-transition",
+    "-webkit-transition-delay",
+    "-webkit-transition-duration",
+    "-webkit-transition-property",
+    "-webkit-transition-timing-function",
+    "-webkit-user-select",
+    "@@iterator",
+    "ABORT_ERR",
+    "ACTIVE",
+    "ACTIVE_ATTRIBUTES",
+    "ACTIVE_TEXTURE",
+    "ACTIVE_UNIFORMS",
+    "ACTIVE_UNIFORM_BLOCKS",
+    "ADDITION",
+    "ALIASED_LINE_WIDTH_RANGE",
+    "ALIASED_POINT_SIZE_RANGE",
+    "ALL",
+    "ALLOW_KEYBOARD_INPUT",
+    "ALLPASS",
+    "ALPHA",
+    "ALPHA_BITS",
+    "ALREADY_SIGNALED",
+    "ALT_MASK",
+    "ALWAYS",
+    "ANY_SAMPLES_PASSED",
+    "ANY_SAMPLES_PASSED_CONSERVATIVE",
+    "ANY_TYPE",
+    "ANY_UNORDERED_NODE_TYPE",
+    "ARRAY_BUFFER",
+    "ARRAY_BUFFER_BINDING",
+    "ATTACHED_SHADERS",
+    "ATTRIBUTE_NODE",
+    "AT_TARGET",
+    "AbortController",
+    "AbortSignal",
+    "AbsoluteOrientationSensor",
+    "AbstractRange",
+    "Accelerometer",
+    "AddSearchProvider",
+    "AggregateError",
+    "AnalyserNode",
+    "Animation",
+    "AnimationEffect",
+    "AnimationEvent",
+    "AnimationPlaybackEvent",
+    "AnimationTimeline",
+    "AnonXMLHttpRequest",
+    "Any",
+    "AnyPermissions",
+    "ApplicationCache",
+    "ApplicationCacheErrorEvent",
+    "Array",
+    "ArrayBuffer",
+    "ArrayType",
+    "AsyncDisposableStack",
+    "Atomics",
+    "Attr",
+    "Audio",
+    "AudioBuffer",
+    "AudioBufferSourceNode",
+    "AudioContext",
+    "AudioData",
+    "AudioDecoder",
+    "AudioDestinationNode",
+    "AudioEncoder",
+    "AudioListener",
+    "AudioNode",
+    "AudioParam",
+    "AudioParamMap",
+    "AudioProcessingEvent",
+    "AudioScheduledSourceNode",
+    "AudioSinkInfo",
+    "AudioStreamTrack",
+    "AudioWorklet",
+    "AudioWorkletNode",
+    "AuthenticatorAssertionResponse",
+    "AuthenticatorAttestationResponse",
+    "AuthenticatorResponse",
+    "AutocompleteErrorEvent",
+    "BACK",
+    "BAD_BOUNDARYPOINTS_ERR",
+    "BAD_REQUEST",
+    "BANDPASS",
+    "BLEND",
+    "BLEND_COLOR",
+    "BLEND_DST_ALPHA",
+    "BLEND_DST_RGB",
+    "BLEND_EQUATION",
+    "BLEND_EQUATION_ALPHA",
+    "BLEND_EQUATION_RGB",
+    "BLEND_SRC_ALPHA",
+    "BLEND_SRC_RGB",
+    "BLUE",
+    "BLUE_BITS",
+    "BLUR",
+    "BOOL",
+    "BOOLEAN_TYPE",
+    "BOOL_VEC2",
+    "BOOL_VEC3",
+    "BOOL_VEC4",
+    "BOTH",
+    "BROWSER_DEFAULT_WEBGL",
+    "BUBBLING_PHASE",
+    "BUFFER_SIZE",
+    "BUFFER_USAGE",
+    "BYTE",
+    "BYTES_PER_ELEMENT",
+    "BackgroundFetchManager",
+    "BackgroundFetchRecord",
+    "BackgroundFetchRegistration",
+    "BarProp",
+    "BarcodeDetector",
+    "BaseAudioContext",
+    "BaseHref",
+    "BatteryManager",
+    "BeforeInstallPromptEvent",
+    "BeforeLoadEvent",
+    "BeforeUnloadEvent",
+    "BigInt",
+    "BigInt64Array",
+    "BigUint64Array",
+    "BiquadFilterNode",
+    "Blob",
+    "BlobEvent",
+    "Bluetooth",
+    "BluetoothCharacteristicProperties",
+    "BluetoothDevice",
+    "BluetoothRemoteGATTCharacteristic",
+    "BluetoothRemoteGATTDescriptor",
+    "BluetoothRemoteGATTServer",
+    "BluetoothRemoteGATTService",
+    "BluetoothUUID",
+    "Boolean",
+    "BroadcastChannel",
+    "BrowserCaptureMediaStreamTrack",
+    "BrowserInfo",
+    "ByteLengthQueuingStrategy",
+    "CAPTURING_PHASE",
+    "CCW",
+    "CDATASection",
+    "CDATA_SECTION_NODE",
+    "CHANGE",
+    "CHARSET_RULE",
+    "CHECKING",
+    "CLAMP_TO_EDGE",
+    "CLICK",
+    "CLOSED",
+    "CLOSING",
+    "COLOR",
+    "COLOR_ATTACHMENT0",
+    "COLOR_ATTACHMENT1",
+    "COLOR_ATTACHMENT10",
+    "COLOR_ATTACHMENT11",
+    "COLOR_ATTACHMENT12",
+    "COLOR_ATTACHMENT13",
+    "COLOR_ATTACHMENT14",
+    "COLOR_ATTACHMENT15",
+    "COLOR_ATTACHMENT2",
+    "COLOR_ATTACHMENT3",
+    "COLOR_ATTACHMENT4",
+    "COLOR_ATTACHMENT5",
+    "COLOR_ATTACHMENT6",
+    "COLOR_ATTACHMENT7",
+    "COLOR_ATTACHMENT8",
+    "COLOR_ATTACHMENT9",
+    "COLOR_BUFFER_BIT",
+    "COLOR_CLEAR_VALUE",
+    "COLOR_WRITEMASK",
+    "COMMENT_NODE",
+    "COMPARE_REF_TO_TEXTURE",
+    "COMPILE_STATUS",
+    "COMPLETION_STATUS_KHR",
+    "COMPRESSED_RGBA_S3TC_DXT1_EXT",
+    "COMPRESSED_RGBA_S3TC_DXT3_EXT",
+    "COMPRESSED_RGBA_S3TC_DXT5_EXT",
+    "COMPRESSED_RGB_S3TC_DXT1_EXT",
+    "COMPRESSED_TEXTURE_FORMATS",
+    "COMPUTE",
+    "CONDITION_SATISFIED",
+    "CONFIGURATION_UNSUPPORTED",
+    "CONNECTING",
+    "CONSTANT_ALPHA",
+    "CONSTANT_COLOR",
+    "CONSTRAINT_ERR",
+    "CONTEXT_LOST_WEBGL",
+    "CONTROL_MASK",
+    "COPY_DST",
+    "COPY_READ_BUFFER",
+    "COPY_READ_BUFFER_BINDING",
+    "COPY_SRC",
+    "COPY_WRITE_BUFFER",
+    "COPY_WRITE_BUFFER_BINDING",
+    "COUNTER_STYLE_RULE",
+    "CSPViolationReportBody",
+    "CSS",
+    "CSS2Properties",
+    "CSSAnimation",
+    "CSSCharsetRule",
+    "CSSConditionRule",
+    "CSSContainerRule",
+    "CSSCounterStyleRule",
+    "CSSFontFaceRule",
+    "CSSFontFeatureValuesRule",
+    "CSSFontPaletteValuesRule",
+    "CSSFunctionDeclarations",
+    "CSSFunctionDescriptors",
+    "CSSFunctionRule",
+    "CSSGroupingRule",
+    "CSSImageValue",
+    "CSSImportRule",
+    "CSSKeyframeRule",
+    "CSSKeyframesRule",
+    "CSSKeywordValue",
+    "CSSLayerBlockRule",
+    "CSSLayerStatementRule",
+    "CSSMarginRule",
+    "CSSMathClamp",
+    "CSSMathInvert",
+    "CSSMathMax",
+    "CSSMathMin",
+    "CSSMathNegate",
+    "CSSMathProduct",
+    "CSSMathSum",
+    "CSSMathValue",
+    "CSSMatrixComponent",
+    "CSSMediaRule",
+    "CSSMozDocumentRule",
+    "CSSNameSpaceRule",
+    "CSSNamespaceRule",
+    "CSSNestedDeclarations",
+    "CSSNumericArray",
+    "CSSNumericValue",
+    "CSSPageDescriptors",
+    "CSSPageRule",
+    "CSSPerspective",
+    "CSSPositionTryDescriptors",
+    "CSSPositionTryRule",
+    "CSSPositionValue",
+    "CSSPrimitiveValue",
+    "CSSPropertyRule",
+    "CSSRotate",
+    "CSSRule",
+    "CSSRuleList",
+    "CSSScale",
+    "CSSScopeRule",
+    "CSSSkew",
+    "CSSSkewX",
+    "CSSSkewY",
+    "CSSStartingStyleRule",
+    "CSSStyleDeclaration",
+    "CSSStyleProperties",
+    "CSSStyleRule",
+    "CSSStyleSheet",
+    "CSSStyleValue",
+    "CSSSupportsRule",
+    "CSSTransformComponent",
+    "CSSTransformValue",
+    "CSSTransition",
+    "CSSTranslate",
+    "CSSUnitValue",
+    "CSSUnknownRule",
+    "CSSUnparsedValue",
+    "CSSValue",
+    "CSSValueList",
+    "CSSVariableReferenceValue",
+    "CSSVariablesDeclaration",
+    "CSSVariablesRule",
+    "CSSViewTransitionRule",
+    "CSSViewportRule",
+    "CSS_ATTR",
+    "CSS_CM",
+    "CSS_COUNTER",
+    "CSS_CUSTOM",
+    "CSS_DEG",
+    "CSS_DIMENSION",
+    "CSS_EMS",
+    "CSS_EXS",
+    "CSS_FILTER_BLUR",
+    "CSS_FILTER_BRIGHTNESS",
+    "CSS_FILTER_CONTRAST",
+    "CSS_FILTER_CUSTOM",
+    "CSS_FILTER_DROP_SHADOW",
+    "CSS_FILTER_GRAYSCALE",
+    "CSS_FILTER_HUE_ROTATE",
+    "CSS_FILTER_INVERT",
+    "CSS_FILTER_OPACITY",
+    "CSS_FILTER_REFERENCE",
+    "CSS_FILTER_SATURATE",
+    "CSS_FILTER_SEPIA",
+    "CSS_GRAD",
+    "CSS_HZ",
+    "CSS_IDENT",
+    "CSS_IN",
+    "CSS_INHERIT",
+    "CSS_KHZ",
+    "CSS_MATRIX",
+    "CSS_MATRIX3D",
+    "CSS_MM",
+    "CSS_MS",
+    "CSS_NUMBER",
+    "CSS_PC",
+    "CSS_PERCENTAGE",
+    "CSS_PERSPECTIVE",
+    "CSS_PRIMITIVE_VALUE",
+    "CSS_PT",
+    "CSS_PX",
+    "CSS_RAD",
+    "CSS_RECT",
+    "CSS_RGBCOLOR",
+    "CSS_ROTATE",
+    "CSS_ROTATE3D",
+    "CSS_ROTATEX",
+    "CSS_ROTATEY",
+    "CSS_ROTATEZ",
+    "CSS_S",
+    "CSS_SCALE",
+    "CSS_SCALE3D",
+    "CSS_SCALEX",
+    "CSS_SCALEY",
+    "CSS_SCALEZ",
+    "CSS_SKEW",
+    "CSS_SKEWX",
+    "CSS_SKEWY",
+    "CSS_STRING",
+    "CSS_TRANSLATE",
+    "CSS_TRANSLATE3D",
+    "CSS_TRANSLATEX",
+    "CSS_TRANSLATEY",
+    "CSS_TRANSLATEZ",
+    "CSS_UNKNOWN",
+    "CSS_URI",
+    "CSS_VALUE_LIST",
+    "CSS_VH",
+    "CSS_VMAX",
+    "CSS_VMIN",
+    "CSS_VW",
+    "CULL_FACE",
+    "CULL_FACE_MODE",
+    "CURRENT_PROGRAM",
+    "CURRENT_QUERY",
+    "CURRENT_VERTEX_ATTRIB",
+    "CUSTOM",
+    "CW",
+    "Cache",
+    "CacheStorage",
+    "CanvasCaptureMediaStream",
+    "CanvasCaptureMediaStreamTrack",
+    "CanvasGradient",
+    "CanvasPattern",
+    "CanvasRenderingContext2D",
+    "CaptureController",
+    "CaretPosition",
+    "ChannelMergerNode",
+    "ChannelSplitterNode",
+    "ChapterInformation",
+    "CharacterBoundsUpdateEvent",
+    "CharacterData",
+    "ClientRect",
+    "ClientRectList",
+    "Clipboard",
+    "ClipboardEvent",
+    "ClipboardItem",
+    "CloseEvent",
+    "CloseWatcher",
+    "Collator",
+    "ColorArray",
+    "ColorValue",
+    "CommandEvent",
+    "Comment",
+    "CompileError",
+    "CompositionEvent",
+    "CompressionStream",
+    "Console",
+    "ConstantSourceNode",
+    "ContentVisibilityAutoStateChangeEvent",
+    "ContextFilter",
+    "ContextType",
+    "Controllers",
+    "ConvolverNode",
+    "CookieChangeEvent",
+    "CookieStore",
+    "CookieStoreManager",
+    "CountQueuingStrategy",
+    "Counter",
+    "CreateMonitor",
+    "CreateType",
+    "Credential",
+    "CredentialsContainer",
+    "CropTarget",
+    "Crypto",
+    "CryptoKey",
+    "CustomElementRegistry",
+    "CustomEvent",
+    "CustomStateSet",
+    "DATABASE_ERR",
+    "DATA_CLONE_ERR",
+    "DATA_ERR",
+    "DBLCLICK",
+    "DECR",
+    "DECR_WRAP",
+    "DELETE_STATUS",
+    "DEPTH",
+    "DEPTH24_STENCIL8",
+    "DEPTH32F_STENCIL8",
+    "DEPTH_ATTACHMENT",
+    "DEPTH_BITS",
+    "DEPTH_BUFFER_BIT",
+    "DEPTH_CLEAR_VALUE",
+    "DEPTH_COMPONENT",
+    "DEPTH_COMPONENT16",
+    "DEPTH_COMPONENT24",
+    "DEPTH_COMPONENT32F",
+    "DEPTH_FUNC",
+    "DEPTH_RANGE",
+    "DEPTH_STENCIL",
+    "DEPTH_STENCIL_ATTACHMENT",
+    "DEPTH_TEST",
+    "DEPTH_WRITEMASK",
+    "DEVICE_INELIGIBLE",
+    "DIRECTION_DOWN",
+    "DIRECTION_LEFT",
+    "DIRECTION_RIGHT",
+    "DIRECTION_UP",
+    "DISABLED",
+    "DISPATCH_REQUEST_ERR",
+    "DITHER",
+    "DOCUMENT_FRAGMENT_NODE",
+    "DOCUMENT_NODE",
+    "DOCUMENT_POSITION_CONTAINED_BY",
+    "DOCUMENT_POSITION_CONTAINS",
+    "DOCUMENT_POSITION_DISCONNECTED",
+    "DOCUMENT_POSITION_FOLLOWING",
+    "DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC",
+    "DOCUMENT_POSITION_PRECEDING",
+    "DOCUMENT_TYPE_NODE",
+    "DOMCursor",
+    "DOMError",
+    "DOMException",
+    "DOMImplementation",
+    "DOMImplementationLS",
+    "DOMMatrix",
+    "DOMMatrixReadOnly",
+    "DOMParser",
+    "DOMPoint",
+    "DOMPointReadOnly",
+    "DOMQuad",
+    "DOMRect",
+    "DOMRectList",
+    "DOMRectReadOnly",
+    "DOMRequest",
+    "DOMSTRING_SIZE_ERR",
+    "DOMSettableTokenList",
+    "DOMStringList",
+    "DOMStringMap",
+    "DOMTokenList",
+    "DOMTransactionEvent",
+    "DOM_DELTA_LINE",
+    "DOM_DELTA_PAGE",
+    "DOM_DELTA_PIXEL",
+    "DOM_INPUT_METHOD_DROP",
+    "DOM_INPUT_METHOD_HANDWRITING",
+    "DOM_INPUT_METHOD_IME",
+    "DOM_INPUT_METHOD_KEYBOARD",
+    "DOM_INPUT_METHOD_MULTIMODAL",
+    "DOM_INPUT_METHOD_OPTION",
+    "DOM_INPUT_METHOD_PASTE",
+    "DOM_INPUT_METHOD_SCRIPT",
+    "DOM_INPUT_METHOD_UNKNOWN",
+    "DOM_INPUT_METHOD_VOICE",
+    "DOM_KEY_LOCATION_JOYSTICK",
+    "DOM_KEY_LOCATION_LEFT",
+    "DOM_KEY_LOCATION_MOBILE",
+    "DOM_KEY_LOCATION_NUMPAD",
+    "DOM_KEY_LOCATION_RIGHT",
+    "DOM_KEY_LOCATION_STANDARD",
+    "DOM_VK_0",
+    "DOM_VK_1",
+    "DOM_VK_2",
+    "DOM_VK_3",
+    "DOM_VK_4",
+    "DOM_VK_5",
+    "DOM_VK_6",
+    "DOM_VK_7",
+    "DOM_VK_8",
+    "DOM_VK_9",
+    "DOM_VK_A",
+    "DOM_VK_ACCEPT",
+    "DOM_VK_ADD",
+    "DOM_VK_ALT",
+    "DOM_VK_ALTGR",
+    "DOM_VK_AMPERSAND",
+    "DOM_VK_ASTERISK",
+    "DOM_VK_AT",
+    "DOM_VK_ATTN",
+    "DOM_VK_B",
+    "DOM_VK_BACKSPACE",
+    "DOM_VK_BACK_QUOTE",
+    "DOM_VK_BACK_SLASH",
+    "DOM_VK_BACK_SPACE",
+    "DOM_VK_C",
+    "DOM_VK_CANCEL",
+    "DOM_VK_CAPS_LOCK",
+    "DOM_VK_CIRCUMFLEX",
+    "DOM_VK_CLEAR",
+    "DOM_VK_CLOSE_BRACKET",
+    "DOM_VK_CLOSE_CURLY_BRACKET",
+    "DOM_VK_CLOSE_PAREN",
+    "DOM_VK_COLON",
+    "DOM_VK_COMMA",
+    "DOM_VK_CONTEXT_MENU",
+    "DOM_VK_CONTROL",
+    "DOM_VK_CONVERT",
+    "DOM_VK_CRSEL",
+    "DOM_VK_CTRL",
+    "DOM_VK_D",
+    "DOM_VK_DECIMAL",
+    "DOM_VK_DELETE",
+    "DOM_VK_DIVIDE",
+    "DOM_VK_DOLLAR",
+    "DOM_VK_DOUBLE_QUOTE",
+    "DOM_VK_DOWN",
+    "DOM_VK_E",
+    "DOM_VK_EISU",
+    "DOM_VK_END",
+    "DOM_VK_ENTER",
+    "DOM_VK_EQUALS",
+    "DOM_VK_EREOF",
+    "DOM_VK_ESCAPE",
+    "DOM_VK_EXCLAMATION",
+    "DOM_VK_EXECUTE",
+    "DOM_VK_EXSEL",
+    "DOM_VK_F",
+    "DOM_VK_F1",
+    "DOM_VK_F10",
+    "DOM_VK_F11",
+    "DOM_VK_F12",
+    "DOM_VK_F13",
+    "DOM_VK_F14",
+    "DOM_VK_F15",
+    "DOM_VK_F16",
+    "DOM_VK_F17",
+    "DOM_VK_F18",
+    "DOM_VK_F19",
+    "DOM_VK_F2",
+    "DOM_VK_F20",
+    "DOM_VK_F21",
+    "DOM_VK_F22",
+    "DOM_VK_F23",
+    "DOM_VK_F24",
+    "DOM_VK_F25",
+    "DOM_VK_F26",
+    "DOM_VK_F27",
+    "DOM_VK_F28",
+    "DOM_VK_F29",
+    "DOM_VK_F3",
+    "DOM_VK_F30",
+    "DOM_VK_F31",
+    "DOM_VK_F32",
+    "DOM_VK_F33",
+    "DOM_VK_F34",
+    "DOM_VK_F35",
+    "DOM_VK_F36",
+    "DOM_VK_F4",
+    "DOM_VK_F5",
+    "DOM_VK_F6",
+    "DOM_VK_F7",
+    "DOM_VK_F8",
+    "DOM_VK_F9",
+    "DOM_VK_FINAL",
+    "DOM_VK_FRONT",
+    "DOM_VK_G",
+    "DOM_VK_GREATER_THAN",
+    "DOM_VK_H",
+    "DOM_VK_HANGUL",
+    "DOM_VK_HANJA",
+    "DOM_VK_HASH",
+    "DOM_VK_HELP",
+    "DOM_VK_HK_TOGGLE",
+    "DOM_VK_HOME",
+    "DOM_VK_HYPHEN_MINUS",
+    "DOM_VK_I",
+    "DOM_VK_INSERT",
+    "DOM_VK_J",
+    "DOM_VK_JUNJA",
+    "DOM_VK_K",
+    "DOM_VK_KANA",
+    "DOM_VK_KANJI",
+    "DOM_VK_L",
+    "DOM_VK_LEFT",
+    "DOM_VK_LEFT_TAB",
+    "DOM_VK_LESS_THAN",
+    "DOM_VK_M",
+    "DOM_VK_META",
+    "DOM_VK_MODECHANGE",
+    "DOM_VK_MULTIPLY",
+    "DOM_VK_N",
+    "DOM_VK_NONCONVERT",
+    "DOM_VK_NUMPAD0",
+    "DOM_VK_NUMPAD1",
+    "DOM_VK_NUMPAD2",
+    "DOM_VK_NUMPAD3",
+    "DOM_VK_NUMPAD4",
+    "DOM_VK_NUMPAD5",
+    "DOM_VK_NUMPAD6",
+    "DOM_VK_NUMPAD7",
+    "DOM_VK_NUMPAD8",
+    "DOM_VK_NUMPAD9",
+    "DOM_VK_NUM_LOCK",
+    "DOM_VK_O",
+    "DOM_VK_OEM_1",
+    "DOM_VK_OEM_102",
+    "DOM_VK_OEM_2",
+    "DOM_VK_OEM_3",
+    "DOM_VK_OEM_4",
+    "DOM_VK_OEM_5",
+    "DOM_VK_OEM_6",
+    "DOM_VK_OEM_7",
+    "DOM_VK_OEM_8",
+    "DOM_VK_OEM_COMMA",
+    "DOM_VK_OEM_MINUS",
+    "DOM_VK_OEM_PERIOD",
+    "DOM_VK_OEM_PLUS",
+    "DOM_VK_OPEN_BRACKET",
+    "DOM_VK_OPEN_CURLY_BRACKET",
+    "DOM_VK_OPEN_PAREN",
+    "DOM_VK_P",
+    "DOM_VK_PA1",
+    "DOM_VK_PAGEDOWN",
+    "DOM_VK_PAGEUP",
+    "DOM_VK_PAGE_DOWN",
+    "DOM_VK_PAGE_UP",
+    "DOM_VK_PAUSE",
+    "DOM_VK_PERCENT",
+    "DOM_VK_PERIOD",
+    "DOM_VK_PIPE",
+    "DOM_VK_PLAY",
+    "DOM_VK_PLUS",
+    "DOM_VK_PRINT",
+    "DOM_VK_PRINTSCREEN",
+    "DOM_VK_PROCESSKEY",
+    "DOM_VK_PROPERITES",
+    "DOM_VK_Q",
+    "DOM_VK_QUESTION_MARK",
+    "DOM_VK_QUOTE",
+    "DOM_VK_R",
+    "DOM_VK_REDO",
+    "DOM_VK_RETURN",
+    "DOM_VK_RIGHT",
+    "DOM_VK_S",
+    "DOM_VK_SCROLL_LOCK",
+    "DOM_VK_SELECT",
+    "DOM_VK_SEMICOLON",
+    "DOM_VK_SEPARATOR",
+    "DOM_VK_SHIFT",
+    "DOM_VK_SLASH",
+    "DOM_VK_SLEEP",
+    "DOM_VK_SPACE",
+    "DOM_VK_SUBTRACT",
+    "DOM_VK_T",
+    "DOM_VK_TAB",
+    "DOM_VK_TILDE",
+    "DOM_VK_U",
+    "DOM_VK_UNDERSCORE",
+    "DOM_VK_UNDO",
+    "DOM_VK_UNICODE",
+    "DOM_VK_UP",
+    "DOM_VK_V",
+    "DOM_VK_VOLUME_DOWN",
+    "DOM_VK_VOLUME_MUTE",
+    "DOM_VK_VOLUME_UP",
+    "DOM_VK_W",
+    "DOM_VK_WIN",
+    "DOM_VK_WINDOW",
+    "DOM_VK_WIN_ICO_00",
+    "DOM_VK_WIN_ICO_CLEAR",
+    "DOM_VK_WIN_ICO_HELP",
+    "DOM_VK_WIN_OEM_ATTN",
+    "DOM_VK_WIN_OEM_AUTO",
+    "DOM_VK_WIN_OEM_BACKTAB",
+    "DOM_VK_WIN_OEM_CLEAR",
+    "DOM_VK_WIN_OEM_COPY",
+    "DOM_VK_WIN_OEM_CUSEL",
+    "DOM_VK_WIN_OEM_ENLW",
+    "DOM_VK_WIN_OEM_FINISH",
+    "DOM_VK_WIN_OEM_FJ_JISHO",
+    "DOM_VK_WIN_OEM_FJ_LOYA",
+    "DOM_VK_WIN_OEM_FJ_MASSHOU",
+    "DOM_VK_WIN_OEM_FJ_ROYA",
+    "DOM_VK_WIN_OEM_FJ_TOUROKU",
+    "DOM_VK_WIN_OEM_JUMP",
+    "DOM_VK_WIN_OEM_PA1",
+    "DOM_VK_WIN_OEM_PA2",
+    "DOM_VK_WIN_OEM_PA3",
+    "DOM_VK_WIN_OEM_RESET",
+    "DOM_VK_WIN_OEM_WSCTRL",
+    "DOM_VK_X",
+    "DOM_VK_XF86XK_ADD_FAVORITE",
+    "DOM_VK_XF86XK_APPLICATION_LEFT",
+    "DOM_VK_XF86XK_APPLICATION_RIGHT",
+    "DOM_VK_XF86XK_AUDIO_CYCLE_TRACK",
+    "DOM_VK_XF86XK_AUDIO_FORWARD",
+    "DOM_VK_XF86XK_AUDIO_LOWER_VOLUME",
+    "DOM_VK_XF86XK_AUDIO_MEDIA",
+    "DOM_VK_XF86XK_AUDIO_MUTE",
+    "DOM_VK_XF86XK_AUDIO_NEXT",
+    "DOM_VK_XF86XK_AUDIO_PAUSE",
+    "DOM_VK_XF86XK_AUDIO_PLAY",
+    "DOM_VK_XF86XK_AUDIO_PREV",
+    "DOM_VK_XF86XK_AUDIO_RAISE_VOLUME",
+    "DOM_VK_XF86XK_AUDIO_RANDOM_PLAY",
+    "DOM_VK_XF86XK_AUDIO_RECORD",
+    "DOM_VK_XF86XK_AUDIO_REPEAT",
+    "DOM_VK_XF86XK_AUDIO_REWIND",
+    "DOM_VK_XF86XK_AUDIO_STOP",
+    "DOM_VK_XF86XK_AWAY",
+    "DOM_VK_XF86XK_BACK",
+    "DOM_VK_XF86XK_BACK_FORWARD",
+    "DOM_VK_XF86XK_BATTERY",
+    "DOM_VK_XF86XK_BLUE",
+    "DOM_VK_XF86XK_BLUETOOTH",
+    "DOM_VK_XF86XK_BOOK",
+    "DOM_VK_XF86XK_BRIGHTNESS_ADJUST",
+    "DOM_VK_XF86XK_CALCULATOR",
+    "DOM_VK_XF86XK_CALENDAR",
+    "DOM_VK_XF86XK_CD",
+    "DOM_VK_XF86XK_CLOSE",
+    "DOM_VK_XF86XK_COMMUNITY",
+    "DOM_VK_XF86XK_CONTRAST_ADJUST",
+    "DOM_VK_XF86XK_COPY",
+    "DOM_VK_XF86XK_CUT",
+    "DOM_VK_XF86XK_CYCLE_ANGLE",
+    "DOM_VK_XF86XK_DISPLAY",
+    "DOM_VK_XF86XK_DOCUMENTS",
+    "DOM_VK_XF86XK_DOS",
+    "DOM_VK_XF86XK_EJECT",
+    "DOM_VK_XF86XK_EXCEL",
+    "DOM_VK_XF86XK_EXPLORER",
+    "DOM_VK_XF86XK_FAVORITES",
+    "DOM_VK_XF86XK_FINANCE",
+    "DOM_VK_XF86XK_FORWARD",
+    "DOM_VK_XF86XK_FRAME_BACK",
+    "DOM_VK_XF86XK_FRAME_FORWARD",
+    "DOM_VK_XF86XK_GAME",
+    "DOM_VK_XF86XK_GO",
+    "DOM_VK_XF86XK_GREEN",
+    "DOM_VK_XF86XK_HIBERNATE",
+    "DOM_VK_XF86XK_HISTORY",
+    "DOM_VK_XF86XK_HOME_PAGE",
+    "DOM_VK_XF86XK_HOT_LINKS",
+    "DOM_VK_XF86XK_I_TOUCH",
+    "DOM_VK_XF86XK_KBD_BRIGHTNESS_DOWN",
+    "DOM_VK_XF86XK_KBD_BRIGHTNESS_UP",
+    "DOM_VK_XF86XK_KBD_LIGHT_ON_OFF",
+    "DOM_VK_XF86XK_LAUNCH0",
+    "DOM_VK_XF86XK_LAUNCH1",
+    "DOM_VK_XF86XK_LAUNCH2",
+    "DOM_VK_XF86XK_LAUNCH3",
+    "DOM_VK_XF86XK_LAUNCH4",
+    "DOM_VK_XF86XK_LAUNCH5",
+    "DOM_VK_XF86XK_LAUNCH6",
+    "DOM_VK_XF86XK_LAUNCH7",
+    "DOM_VK_XF86XK_LAUNCH8",
+    "DOM_VK_XF86XK_LAUNCH9",
+    "DOM_VK_XF86XK_LAUNCH_A",
+    "DOM_VK_XF86XK_LAUNCH_B",
+    "DOM_VK_XF86XK_LAUNCH_C",
+    "DOM_VK_XF86XK_LAUNCH_D",
+    "DOM_VK_XF86XK_LAUNCH_E",
+    "DOM_VK_XF86XK_LAUNCH_F",
+    "DOM_VK_XF86XK_LIGHT_BULB",
+    "DOM_VK_XF86XK_LOG_OFF",
+    "DOM_VK_XF86XK_MAIL",
+    "DOM_VK_XF86XK_MAIL_FORWARD",
+    "DOM_VK_XF86XK_MARKET",
+    "DOM_VK_XF86XK_MEETING",
+    "DOM_VK_XF86XK_MEMO",
+    "DOM_VK_XF86XK_MENU_KB",
+    "DOM_VK_XF86XK_MENU_PB",
+    "DOM_VK_XF86XK_MESSENGER",
+    "DOM_VK_XF86XK_MON_BRIGHTNESS_DOWN",
+    "DOM_VK_XF86XK_MON_BRIGHTNESS_UP",
+    "DOM_VK_XF86XK_MUSIC",
+    "DOM_VK_XF86XK_MY_COMPUTER",
+    "DOM_VK_XF86XK_MY_SITES",
+    "DOM_VK_XF86XK_NEW",
+    "DOM_VK_XF86XK_NEWS",
+    "DOM_VK_XF86XK_OFFICE_HOME",
+    "DOM_VK_XF86XK_OPEN",
+    "DOM_VK_XF86XK_OPEN_URL",
+    "DOM_VK_XF86XK_OPTION",
+    "DOM_VK_XF86XK_PASTE",
+    "DOM_VK_XF86XK_PHONE",
+    "DOM_VK_XF86XK_PICTURES",
+    "DOM_VK_XF86XK_POWER_DOWN",
+    "DOM_VK_XF86XK_POWER_OFF",
+    "DOM_VK_XF86XK_RED",
+    "DOM_VK_XF86XK_REFRESH",
+    "DOM_VK_XF86XK_RELOAD",
+    "DOM_VK_XF86XK_REPLY",
+    "DOM_VK_XF86XK_ROCKER_DOWN",
+    "DOM_VK_XF86XK_ROCKER_ENTER",
+    "DOM_VK_XF86XK_ROCKER_UP",
+    "DOM_VK_XF86XK_ROTATE_WINDOWS",
+    "DOM_VK_XF86XK_ROTATION_KB",
+    "DOM_VK_XF86XK_ROTATION_PB",
+    "DOM_VK_XF86XK_SAVE",
+    "DOM_VK_XF86XK_SCREEN_SAVER",
+    "DOM_VK_XF86XK_SCROLL_CLICK",
+    "DOM_VK_XF86XK_SCROLL_DOWN",
+    "DOM_VK_XF86XK_SCROLL_UP",
+    "DOM_VK_XF86XK_SEARCH",
+    "DOM_VK_XF86XK_SEND",
+    "DOM_VK_XF86XK_SHOP",
+    "DOM_VK_XF86XK_SPELL",
+    "DOM_VK_XF86XK_SPLIT_SCREEN",
+    "DOM_VK_XF86XK_STANDBY",
+    "DOM_VK_XF86XK_START",
+    "DOM_VK_XF86XK_STOP",
+    "DOM_VK_XF86XK_SUBTITLE",
+    "DOM_VK_XF86XK_SUPPORT",
+    "DOM_VK_XF86XK_SUSPEND",
+    "DOM_VK_XF86XK_TASK_PANE",
+    "DOM_VK_XF86XK_TERMINAL",
+    "DOM_VK_XF86XK_TIME",
+    "DOM_VK_XF86XK_TOOLS",
+    "DOM_VK_XF86XK_TOP_MENU",
+    "DOM_VK_XF86XK_TO_DO_LIST",
+    "DOM_VK_XF86XK_TRAVEL",
+    "DOM_VK_XF86XK_USER1KB",
+    "DOM_VK_XF86XK_USER2KB",
+    "DOM_VK_XF86XK_USER_PB",
+    "DOM_VK_XF86XK_UWB",
+    "DOM_VK_XF86XK_VENDOR_HOME",
+    "DOM_VK_XF86XK_VIDEO",
+    "DOM_VK_XF86XK_VIEW",
+    "DOM_VK_XF86XK_WAKE_UP",
+    "DOM_VK_XF86XK_WEB_CAM",
+    "DOM_VK_XF86XK_WHEEL_BUTTON",
+    "DOM_VK_XF86XK_WLAN",
+    "DOM_VK_XF86XK_WORD",
+    "DOM_VK_XF86XK_WWW",
+    "DOM_VK_XF86XK_XFER",
+    "DOM_VK_XF86XK_YELLOW",
+    "DOM_VK_XF86XK_ZOOM_IN",
+    "DOM_VK_XF86XK_ZOOM_OUT",
+    "DOM_VK_Y",
+    "DOM_VK_Z",
+    "DOM_VK_ZOOM",
+    "DONE",
+    "DONT_CARE",
+    "DOWNLOADING",
+    "DRAGDROP",
+    "DRAW_BUFFER0",
+    "DRAW_BUFFER1",
+    "DRAW_BUFFER10",
+    "DRAW_BUFFER11",
+    "DRAW_BUFFER12",
+    "DRAW_BUFFER13",
+    "DRAW_BUFFER14",
+    "DRAW_BUFFER15",
+    "DRAW_BUFFER2",
+    "DRAW_BUFFER3",
+    "DRAW_BUFFER4",
+    "DRAW_BUFFER5",
+    "DRAW_BUFFER6",
+    "DRAW_BUFFER7",
+    "DRAW_BUFFER8",
+    "DRAW_BUFFER9",
+    "DRAW_FRAMEBUFFER",
+    "DRAW_FRAMEBUFFER_BINDING",
+    "DST_ALPHA",
+    "DST_COLOR",
+    "DYNAMIC_COPY",
+    "DYNAMIC_DRAW",
+    "DYNAMIC_READ",
+    "DataChannel",
+    "DataTransfer",
+    "DataTransferItem",
+    "DataTransferItemList",
+    "DataView",
+    "Date",
+    "DateTimeFormat",
+    "DecompressionStream",
+    "DelayNode",
+    "DelegatedInkTrailPresenter",
+    "DeprecationReportBody",
+    "DesktopNotification",
+    "DesktopNotificationCenter",
+    "Details",
+    "DeviceLightEvent",
+    "DeviceMotionEvent",
+    "DeviceMotionEventAcceleration",
+    "DeviceMotionEventRotationRate",
+    "DeviceOrientationEvent",
+    "DevicePosture",
+    "DeviceProximityEvent",
+    "DeviceStorage",
+    "DeviceStorageChangeEvent",
+    "DigitalCredential",
+    "Directory",
+    "DisplayNames",
+    "DisposableStack",
+    "Document",
+    "DocumentFragment",
+    "DocumentPictureInPicture",
+    "DocumentPictureInPictureEvent",
+    "DocumentTimeline",
+    "DocumentType",
+    "DragEvent",
+    "Duration",
+    "DurationFormat",
+    "DynamicsCompressorNode",
+    "E",
+    "ELEMENT_ARRAY_BUFFER",
+    "ELEMENT_ARRAY_BUFFER_BINDING",
+    "ELEMENT_NODE",
+    "EMPTY",
+    "ENCODING_ERR",
+    "ENDED",
+    "END_TO_END",
+    "END_TO_START",
+    "ENTITY_NODE",
+    "ENTITY_REFERENCE_NODE",
+    "EPSILON",
+    "EQUAL",
+    "EQUALPOWER",
+    "ERROR",
+    "EXPONENTIAL_DISTANCE",
+    "EditContext",
+    "Element",
+    "ElementInternals",
+    "ElementQuery",
+    "EncodedAudioChunk",
+    "EncodedVideoChunk",
+    "EnterPictureInPictureEvent",
+    "Entity",
+    "EntityReference",
+    "Error",
+    "ErrorEvent",
+    "EvalError",
+    "Event",
+    "EventCounts",
+    "EventException",
+    "EventSource",
+    "EventTarget",
+    "Exception",
+    "ExtensionContext",
+    "ExtensionDisabledReason",
+    "ExtensionInfo",
+    "ExtensionInstallType",
+    "ExtensionType",
+    "External",
+    "EyeDropper",
+    "FASTEST",
+    "FIDOSDK",
+    "FILTER_ACCEPT",
+    "FILTER_INTERRUPT",
+    "FILTER_REJECT",
+    "FILTER_SKIP",
+    "FINISHED_STATE",
+    "FIRST_ORDERED_NODE_TYPE",
+    "FLOAT",
+    "FLOAT_32_UNSIGNED_INT_24_8_REV",
+    "FLOAT_MAT2",
+    "FLOAT_MAT2x3",
+    "FLOAT_MAT2x4",
+    "FLOAT_MAT3",
+    "FLOAT_MAT3x2",
+    "FLOAT_MAT3x4",
+    "FLOAT_MAT4",
+    "FLOAT_MAT4x2",
+    "FLOAT_MAT4x3",
+    "FLOAT_VEC2",
+    "FLOAT_VEC3",
+    "FLOAT_VEC4",
+    "FOCUS",
+    "FONT_FACE_RULE",
+    "FONT_FEATURE_VALUES_RULE",
+    "FRAGMENT",
+    "FRAGMENT_SHADER",
+    "FRAGMENT_SHADER_DERIVATIVE_HINT",
+    "FRAGMENT_SHADER_DERIVATIVE_HINT_OES",
+    "FRAMEBUFFER",
+    "FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE",
+    "FRAMEBUFFER_ATTACHMENT_BLUE_SIZE",
+    "FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING",
+    "FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE",
+    "FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE",
+    "FRAMEBUFFER_ATTACHMENT_GREEN_SIZE",
+    "FRAMEBUFFER_ATTACHMENT_OBJECT_NAME",
+    "FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE",
+    "FRAMEBUFFER_ATTACHMENT_RED_SIZE",
+    "FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE",
+    "FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE",
+    "FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER",
+    "FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL",
+    "FRAMEBUFFER_BINDING",
+    "FRAMEBUFFER_COMPLETE",
+    "FRAMEBUFFER_DEFAULT",
+    "FRAMEBUFFER_INCOMPLETE_ATTACHMENT",
+    "FRAMEBUFFER_INCOMPLETE_DIMENSIONS",
+    "FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT",
+    "FRAMEBUFFER_INCOMPLETE_MULTISAMPLE",
+    "FRAMEBUFFER_UNSUPPORTED",
+    "FRONT",
+    "FRONT_AND_BACK",
+    "FRONT_FACE",
+    "FUNC_ADD",
+    "FUNC_REVERSE_SUBTRACT",
+    "FUNC_SUBTRACT",
+    "FeaturePolicy",
+    "FeaturePolicyViolationReportBody",
+    "FederatedCredential",
+    "Feed",
+    "FeedEntry",
+    "Fence",
+    "FencedFrameConfig",
+    "FetchLaterResult",
+    "File",
+    "FileError",
+    "FileList",
+    "FileReader",
+    "FileSystem",
+    "FileSystemDirectoryEntry",
+    "FileSystemDirectoryHandle",
+    "FileSystemDirectoryReader",
+    "FileSystemEntry",
+    "FileSystemFileEntry",
+    "FileSystemFileHandle",
+    "FileSystemHandle",
+    "FileSystemObserver",
+    "FileSystemWritableFileStream",
+    "FinalizationRegistry",
+    "FindInPage",
+    "Float16Array",
+    "Float32Array",
+    "Float64Array",
+    "FocusEvent",
+    "FontData",
+    "FontFace",
+    "FontFaceSet",
+    "FontFaceSetLoadEvent",
+    "FormData",
+    "FormDataEvent",
+    "FragmentDirective",
+    "Function",
+    "GENERATE_MIPMAP_HINT",
+    "GEQUAL",
+    "GPU",
+    "GPUAdapter",
+    "GPUAdapterInfo",
+    "GPUBindGroup",
+    "GPUBindGroupLayout",
+    "GPUBuffer",
+    "GPUBufferUsage",
+    "GPUCanvasContext",
+    "GPUColorWrite",
+    "GPUCommandBuffer",
+    "GPUCommandEncoder",
+    "GPUCompilationInfo",
+    "GPUCompilationMessage",
+    "GPUComputePassEncoder",
+    "GPUComputePipeline",
+    "GPUDevice",
+    "GPUDeviceLostInfo",
+    "GPUError",
+    "GPUExternalTexture",
+    "GPUInternalError",
+    "GPUMapMode",
+    "GPUOutOfMemoryError",
+    "GPUPipelineError",
+    "GPUPipelineLayout",
+    "GPUQuerySet",
+    "GPUQueue",
+    "GPURenderBundle",
+    "GPURenderBundleEncoder",
+    "GPURenderPassEncoder",
+    "GPURenderPipeline",
+    "GPUSampler",
+    "GPUShaderModule",
+    "GPUShaderStage",
+    "GPUSupportedFeatures",
+    "GPUSupportedLimits",
+    "GPUTexture",
+    "GPUTextureUsage",
+    "GPUTextureView",
+    "GPUUncapturedErrorEvent",
+    "GPUValidationError",
+    "GREATER",
+    "GREEN",
+    "GREEN_BITS",
+    "GainNode",
+    "Gamepad",
+    "GamepadAxisMoveEvent",
+    "GamepadButton",
+    "GamepadButtonEvent",
+    "GamepadEvent",
+    "GamepadHapticActuator",
+    "GamepadPose",
+    "Geolocation",
+    "GeolocationCoordinates",
+    "GeolocationPosition",
+    "GeolocationPositionError",
+    "GestureEvent",
+    "GetInfo",
+    "Global",
+    "GravitySensor",
+    "Gyroscope",
+    "HALF_FLOAT",
+    "HAVE_CURRENT_DATA",
+    "HAVE_ENOUGH_DATA",
+    "HAVE_FUTURE_DATA",
+    "HAVE_METADATA",
+    "HAVE_NOTHING",
+    "HEADERS_RECEIVED",
+    "HID",
+    "HIDConnectionEvent",
+    "HIDDEN",
+    "HIDDevice",
+    "HIDInputReportEvent",
+    "HIERARCHY_REQUEST_ERR",
+    "HIGHPASS",
+    "HIGHSHELF",
+    "HIGH_FLOAT",
+    "HIGH_INT",
+    "HORIZONTAL",
+    "HORIZONTAL_AXIS",
+    "HRTF",
+    "HTMLAllCollection",
+    "HTMLAnchorElement",
+    "HTMLAppletElement",
+    "HTMLAreaElement",
+    "HTMLAudioElement",
+    "HTMLBRElement",
+    "HTMLBaseElement",
+    "HTMLBaseFontElement",
+    "HTMLBlockquoteElement",
+    "HTMLBodyElement",
+    "HTMLButtonElement",
+    "HTMLCanvasElement",
+    "HTMLCollection",
+    "HTMLCommandElement",
+    "HTMLContentElement",
+    "HTMLDListElement",
+    "HTMLDataElement",
+    "HTMLDataListElement",
+    "HTMLDetailsElement",
+    "HTMLDialogElement",
+    "HTMLDirectoryElement",
+    "HTMLDivElement",
+    "HTMLDocument",
+    "HTMLElement",
+    "HTMLEmbedElement",
+    "HTMLFencedFrameElement",
+    "HTMLFieldSetElement",
+    "HTMLFontElement",
+    "HTMLFormControlsCollection",
+    "HTMLFormElement",
+    "HTMLFrameElement",
+    "HTMLFrameSetElement",
+    "HTMLHRElement",
+    "HTMLHeadElement",
+    "HTMLHeadingElement",
+    "HTMLHtmlElement",
+    "HTMLIFrameElement",
+    "HTMLImageElement",
+    "HTMLInputElement",
+    "HTMLIsIndexElement",
+    "HTMLKeygenElement",
+    "HTMLLIElement",
+    "HTMLLabelElement",
+    "HTMLLegendElement",
+    "HTMLLinkElement",
+    "HTMLMapElement",
+    "HTMLMarqueeElement",
+    "HTMLMediaElement",
+    "HTMLMenuElement",
+    "HTMLMenuItemElement",
+    "HTMLMetaElement",
+    "HTMLMeterElement",
+    "HTMLModElement",
+    "HTMLOListElement",
+    "HTMLObjectElement",
+    "HTMLOptGroupElement",
+    "HTMLOptionElement",
+    "HTMLOptionsCollection",
+    "HTMLOutputElement",
+    "HTMLParagraphElement",
+    "HTMLParamElement",
+    "HTMLPictureElement",
+    "HTMLPreElement",
+    "HTMLProgressElement",
+    "HTMLPropertiesCollection",
+    "HTMLQuoteElement",
+    "HTMLScriptElement",
+    "HTMLSelectElement",
+    "HTMLSelectedContentElement",
+    "HTMLShadowElement",
+    "HTMLSlotElement",
+    "HTMLSourceElement",
+    "HTMLSpanElement",
+    "HTMLStyleElement",
+    "HTMLTableCaptionElement",
+    "HTMLTableCellElement",
+    "HTMLTableColElement",
+    "HTMLTableElement",
+    "HTMLTableRowElement",
+    "HTMLTableSectionElement",
+    "HTMLTemplateElement",
+    "HTMLTextAreaElement",
+    "HTMLTimeElement",
+    "HTMLTitleElement",
+    "HTMLTrackElement",
+    "HTMLUListElement",
+    "HTMLUnknownElement",
+    "HTMLVideoElement",
+    "HashChangeEvent",
+    "Headers",
+    "Highlight",
+    "HighlightRegistry",
+    "History",
+    "Hz",
+    "ICE_CHECKING",
+    "ICE_CLOSED",
+    "ICE_COMPLETED",
+    "ICE_CONNECTED",
+    "ICE_FAILED",
+    "ICE_GATHERING",
+    "ICE_WAITING",
+    "IDBCursor",
+    "IDBCursorWithValue",
+    "IDBDatabase",
+    "IDBDatabaseException",
+    "IDBFactory",
+    "IDBFileHandle",
+    "IDBFileRequest",
+    "IDBIndex",
+    "IDBKeyRange",
+    "IDBMutableFile",
+    "IDBObjectStore",
+    "IDBOpenDBRequest",
+    "IDBRecord",
+    "IDBRequest",
+    "IDBTransaction",
+    "IDBVersionChangeEvent",
+    "IDLE",
+    "IIRFilterNode",
+    "IMPLEMENTATION_COLOR_READ_FORMAT",
+    "IMPLEMENTATION_COLOR_READ_TYPE",
+    "IMPORT_RULE",
+    "INCR",
+    "INCR_WRAP",
+    "INDEX",
+    "INDEX_SIZE_ERR",
+    "INDIRECT",
+    "INT",
+    "INTERLEAVED_ATTRIBS",
+    "INT_2_10_10_10_REV",
+    "INT_SAMPLER_2D",
+    "INT_SAMPLER_2D_ARRAY",
+    "INT_SAMPLER_3D",
+    "INT_SAMPLER_CUBE",
+    "INT_VEC2",
+    "INT_VEC3",
+    "INT_VEC4",
+    "INUSE_ATTRIBUTE_ERR",
+    "INVALID_ACCESS_ERR",
+    "INVALID_CHARACTER_ERR",
+    "INVALID_ENUM",
+    "INVALID_EXPRESSION_ERR",
+    "INVALID_FRAMEBUFFER_OPERATION",
+    "INVALID_INDEX",
+    "INVALID_MODIFICATION_ERR",
+    "INVALID_NODE_TYPE_ERR",
+    "INVALID_OPERATION",
+    "INVALID_STATE_ERR",
+    "INVALID_VALUE",
+    "INVERSE_DISTANCE",
+    "INVERT",
+    "IceCandidate",
+    "IconInfo",
+    "IdentityCredential",
+    "IdentityCredentialError",
+    "IdentityProvider",
+    "IdleDeadline",
+    "IdleDetector",
+    "Image",
+    "ImageBitmap",
+    "ImageBitmapRenderingContext",
+    "ImageCapture",
+    "ImageData",
+    "ImageDataType",
+    "ImageDecoder",
+    "ImageTrack",
+    "ImageTrackList",
+    "Infinity",
+    "Ink",
+    "InputDeviceCapabilities",
+    "InputDeviceInfo",
+    "InputEvent",
+    "InputMethodContext",
+    "InstallTrigger",
+    "InstallTriggerImpl",
+    "Instance",
+    "Instant",
+    "Int16Array",
+    "Int32Array",
+    "Int8Array",
+    "IntegrityViolationReportBody",
+    "Intent",
+    "InterestEvent",
+    "InternalError",
+    "IntersectionObserver",
+    "IntersectionObserverEntry",
+    "Intl",
+    "IsSearchProviderInstalled",
+    "Iterator",
+    "JSON",
+    "JSTag",
+    "KEEP",
+    "KEYDOWN",
+    "KEYFRAMES_RULE",
+    "KEYFRAME_RULE",
+    "KEYPRESS",
+    "KEYUP",
+    "KeyEvent",
+    "Keyboard",
+    "KeyboardEvent",
+    "KeyboardLayoutMap",
+    "KeyframeEffect",
+    "LENGTHADJUST_SPACING",
+    "LENGTHADJUST_SPACINGANDGLYPHS",
+    "LENGTHADJUST_UNKNOWN",
+    "LEQUAL",
+    "LESS",
+    "LINEAR",
+    "LINEAR_DISTANCE",
+    "LINEAR_MIPMAP_LINEAR",
+    "LINEAR_MIPMAP_NEAREST",
+    "LINES",
+    "LINE_LOOP",
+    "LINE_STRIP",
+    "LINE_WIDTH",
+    "LINK_STATUS",
+    "LIVE",
+    "LN10",
+    "LN2",
+    "LOADED",
+    "LOADING",
+    "LOG10E",
+    "LOG2E",
+    "LOWPASS",
+    "LOWSHELF",
+    "LOW_FLOAT",
+    "LOW_INT",
+    "LSException",
+    "LSParserFilter",
+    "LUMINANCE",
+    "LUMINANCE_ALPHA",
+    "LanguageCode",
+    "LanguageDetector",
+    "LargestContentfulPaint",
+    "LaunchParams",
+    "LaunchQueue",
+    "LaunchType",
+    "LayoutShift",
+    "LayoutShiftAttribution",
+    "LinearAccelerationSensor",
+    "LinkError",
+    "ListFormat",
+    "LocalMediaStream",
+    "Locale",
+    "Location",
+    "Lock",
+    "LockManager",
+    "MAP_READ",
+    "MAP_WRITE",
+    "MARGIN_RULE",
+    "MAX",
+    "MAX_3D_TEXTURE_SIZE",
+    "MAX_ARRAY_TEXTURE_LAYERS",
+    "MAX_CAPTURE_VISIBLE_TAB_CALLS_PER_SECOND",
+    "MAX_CLIENT_WAIT_TIMEOUT_WEBGL",
+    "MAX_COLOR_ATTACHMENTS",
+    "MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS",
+    "MAX_COMBINED_TEXTURE_IMAGE_UNITS",
+    "MAX_COMBINED_UNIFORM_BLOCKS",
+    "MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS",
+    "MAX_CUBE_MAP_TEXTURE_SIZE",
+    "MAX_DRAW_BUFFERS",
+    "MAX_ELEMENTS_INDICES",
+    "MAX_ELEMENTS_VERTICES",
+    "MAX_ELEMENT_INDEX",
+    "MAX_FRAGMENT_INPUT_COMPONENTS",
+    "MAX_FRAGMENT_UNIFORM_BLOCKS",
+    "MAX_FRAGMENT_UNIFORM_COMPONENTS",
+    "MAX_FRAGMENT_UNIFORM_VECTORS",
+    "MAX_PROGRAM_TEXEL_OFFSET",
+    "MAX_RENDERBUFFER_SIZE",
+    "MAX_SAFE_INTEGER",
+    "MAX_SAMPLES",
+    "MAX_SERVER_WAIT_TIMEOUT",
+    "MAX_TEXTURE_IMAGE_UNITS",
+    "MAX_TEXTURE_LOD_BIAS",
+    "MAX_TEXTURE_MAX_ANISOTROPY_EXT",
+    "MAX_TEXTURE_SIZE",
+    "MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS",
+    "MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS",
+    "MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS",
+    "MAX_UNIFORM_BLOCK_SIZE",
+    "MAX_UNIFORM_BUFFER_BINDINGS",
+    "MAX_VALUE",
+    "MAX_VARYING_COMPONENTS",
+    "MAX_VARYING_VECTORS",
+    "MAX_VERTEX_ATTRIBS",
+    "MAX_VERTEX_OUTPUT_COMPONENTS",
+    "MAX_VERTEX_TEXTURE_IMAGE_UNITS",
+    "MAX_VERTEX_UNIFORM_BLOCKS",
+    "MAX_VERTEX_UNIFORM_COMPONENTS",
+    "MAX_VERTEX_UNIFORM_VECTORS",
+    "MAX_VIEWPORT_DIMS",
+    "MEDIA_ERR_ABORTED",
+    "MEDIA_ERR_DECODE",
+    "MEDIA_ERR_ENCRYPTED",
+    "MEDIA_ERR_NETWORK",
+    "MEDIA_ERR_SRC_NOT_SUPPORTED",
+    "MEDIA_KEYERR_CLIENT",
+    "MEDIA_KEYERR_DOMAIN",
+    "MEDIA_KEYERR_HARDWARECHANGE",
+    "MEDIA_KEYERR_OUTPUT",
+    "MEDIA_KEYERR_SERVICE",
+    "MEDIA_KEYERR_UNKNOWN",
+    "MEDIA_RULE",
+    "MEDIUM_FLOAT",
+    "MEDIUM_INT",
+    "META_MASK",
+    "MIDIAccess",
+    "MIDIConnectionEvent",
+    "MIDIInput",
+    "MIDIInputMap",
+    "MIDIMessageEvent",
+    "MIDIOutput",
+    "MIDIOutputMap",
+    "MIDIPort",
+    "MIN",
+    "MIN_PROGRAM_TEXEL_OFFSET",
+    "MIN_SAFE_INTEGER",
+    "MIN_VALUE",
+    "MIRRORED_REPEAT",
+    "MODE_ASYNCHRONOUS",
+    "MODE_SYNCHRONOUS",
+    "MODIFICATION",
+    "MOUSEDOWN",
+    "MOUSEDRAG",
+    "MOUSEMOVE",
+    "MOUSEOUT",
+    "MOUSEOVER",
+    "MOUSEUP",
+    "MOZ_KEYFRAMES_RULE",
+    "MOZ_KEYFRAME_RULE",
+    "MOZ_SOURCE_CURSOR",
+    "MOZ_SOURCE_ERASER",
+    "MOZ_SOURCE_KEYBOARD",
+    "MOZ_SOURCE_MOUSE",
+    "MOZ_SOURCE_PEN",
+    "MOZ_SOURCE_TOUCH",
+    "MOZ_SOURCE_UNKNOWN",
+    "MSGESTURE_FLAG_BEGIN",
+    "MSGESTURE_FLAG_CANCEL",
+    "MSGESTURE_FLAG_END",
+    "MSGESTURE_FLAG_INERTIA",
+    "MSGESTURE_FLAG_NONE",
+    "MSPOINTER_TYPE_MOUSE",
+    "MSPOINTER_TYPE_PEN",
+    "MSPOINTER_TYPE_TOUCH",
+    "MS_ASYNC_CALLBACK_STATUS_ASSIGN_DELEGATE",
+    "MS_ASYNC_CALLBACK_STATUS_CANCEL",
+    "MS_ASYNC_CALLBACK_STATUS_CHOOSEANY",
+    "MS_ASYNC_CALLBACK_STATUS_ERROR",
+    "MS_ASYNC_CALLBACK_STATUS_JOIN",
+    "MS_ASYNC_OP_STATUS_CANCELED",
+    "MS_ASYNC_OP_STATUS_ERROR",
+    "MS_ASYNC_OP_STATUS_SUCCESS",
+    "MS_MANIPULATION_STATE_ACTIVE",
+    "MS_MANIPULATION_STATE_CANCELLED",
+    "MS_MANIPULATION_STATE_COMMITTED",
+    "MS_MANIPULATION_STATE_DRAGGING",
+    "MS_MANIPULATION_STATE_INERTIA",
+    "MS_MANIPULATION_STATE_PRESELECT",
+    "MS_MANIPULATION_STATE_SELECTING",
+    "MS_MANIPULATION_STATE_STOPPED",
+    "MS_MEDIA_ERR_ENCRYPTED",
+    "MS_MEDIA_KEYERR_CLIENT",
+    "MS_MEDIA_KEYERR_DOMAIN",
+    "MS_MEDIA_KEYERR_HARDWARECHANGE",
+    "MS_MEDIA_KEYERR_OUTPUT",
+    "MS_MEDIA_KEYERR_SERVICE",
+    "MS_MEDIA_KEYERR_UNKNOWN",
+    "Map",
+    "Math",
+    "MathMLElement",
+    "MediaCapabilities",
+    "MediaCapabilitiesInfo",
+    "MediaController",
+    "MediaDeviceInfo",
+    "MediaDevices",
+    "MediaElementAudioSourceNode",
+    "MediaEncryptedEvent",
+    "MediaError",
+    "MediaKeyError",
+    "MediaKeyEvent",
+    "MediaKeyMessageEvent",
+    "MediaKeyNeededEvent",
+    "MediaKeySession",
+    "MediaKeyStatusMap",
+    "MediaKeySystemAccess",
+    "MediaKeys",
+    "MediaList",
+    "MediaMetadata",
+    "MediaQueryList",
+    "MediaQueryListEvent",
+    "MediaRecorder",
+    "MediaRecorderErrorEvent",
+    "MediaSession",
+    "MediaSettingsRange",
+    "MediaSource",
+    "MediaSourceHandle",
+    "MediaStream",
+    "MediaStreamAudioDestinationNode",
+    "MediaStreamAudioSourceNode",
+    "MediaStreamEvent",
+    "MediaStreamTrack",
+    "MediaStreamTrackAudioSourceNode",
+    "MediaStreamTrackAudioStats",
+    "MediaStreamTrackEvent",
+    "MediaStreamTrackGenerator",
+    "MediaStreamTrackProcessor",
+    "MediaStreamTrackVideoStats",
+    "Memory",
+    "MessageChannel",
+    "MessageEvent",
+    "MessagePort",
+    "MessageSender",
+    "Methods",
+    "MimeType",
+    "MimeTypeArray",
+    "Module",
+    "MouseEvent",
+    "MouseScrollEvent",
+    "MozAnimation",
+    "MozAnimationDelay",
+    "MozAnimationDirection",
+    "MozAnimationDuration",
+    "MozAnimationFillMode",
+    "MozAnimationIterationCount",
+    "MozAnimationName",
+    "MozAnimationPlayState",
+    "MozAnimationTimingFunction",
+    "MozAppearance",
+    "MozBackfaceVisibility",
+    "MozBinding",
+    "MozBorderBottomColors",
+    "MozBorderEnd",
+    "MozBorderEndColor",
+    "MozBorderEndStyle",
+    "MozBorderEndWidth",
+    "MozBorderImage",
+    "MozBorderLeftColors",
+    "MozBorderRightColors",
+    "MozBorderStart",
+    "MozBorderStartColor",
+    "MozBorderStartStyle",
+    "MozBorderStartWidth",
+    "MozBorderTopColors",
+    "MozBoxAlign",
+    "MozBoxDirection",
+    "MozBoxFlex",
+    "MozBoxOrdinalGroup",
+    "MozBoxOrient",
+    "MozBoxPack",
+    "MozBoxSizing",
+    "MozCSSKeyframeRule",
+    "MozCSSKeyframesRule",
+    "MozColumnCount",
+    "MozColumnFill",
+    "MozColumnGap",
+    "MozColumnRule",
+    "MozColumnRuleColor",
+    "MozColumnRuleStyle",
+    "MozColumnRuleWidth",
+    "MozColumnWidth",
+    "MozColumns",
+    "MozContactChangeEvent",
+    "MozFloatEdge",
+    "MozFontFeatureSettings",
+    "MozFontLanguageOverride",
+    "MozForceBrokenImageIcon",
+    "MozHyphens",
+    "MozImageRegion",
+    "MozMarginEnd",
+    "MozMarginStart",
+    "MozMmsEvent",
+    "MozMmsMessage",
+    "MozMobileMessageThread",
+    "MozOSXFontSmoothing",
+    "MozOrient",
+    "MozOsxFontSmoothing",
+    "MozOutlineRadius",
+    "MozOutlineRadiusBottomleft",
+    "MozOutlineRadiusBottomright",
+    "MozOutlineRadiusTopleft",
+    "MozOutlineRadiusTopright",
+    "MozPaddingEnd",
+    "MozPaddingStart",
+    "MozPerspective",
+    "MozPerspectiveOrigin",
+    "MozPowerManager",
+    "MozSettingsEvent",
+    "MozSmsEvent",
+    "MozSmsMessage",
+    "MozStackSizing",
+    "MozTabSize",
+    "MozTextAlignLast",
+    "MozTextDecorationColor",
+    "MozTextDecorationLine",
+    "MozTextDecorationStyle",
+    "MozTextSizeAdjust",
+    "MozTransform",
+    "MozTransformOrigin",
+    "MozTransformStyle",
+    "MozTransition",
+    "MozTransitionDelay",
+    "MozTransitionDuration",
+    "MozTransitionProperty",
+    "MozTransitionTimingFunction",
+    "MozUserFocus",
+    "MozUserInput",
+    "MozUserModify",
+    "MozUserSelect",
+    "MozWindowDragging",
+    "MozWindowShadow",
+    "MutationEvent",
+    "MutationObserver",
+    "MutationRecord",
+    "MutedInfo",
+    "MutedInfoReason",
+    "NAMESPACE_ERR",
+    "NAMESPACE_RULE",
+    "NEAREST",
+    "NEAREST_MIPMAP_LINEAR",
+    "NEAREST_MIPMAP_NEAREST",
+    "NEGATIVE_INFINITY",
+    "NETWORK_EMPTY",
+    "NETWORK_ERR",
+    "NETWORK_IDLE",
+    "NETWORK_LOADED",
+    "NETWORK_LOADING",
+    "NETWORK_NO_SOURCE",
+    "NEVER",
+    "NEW",
+    "NEXT",
+    "NEXT_NO_DUPLICATE",
+    "NICEST",
+    "NODE_AFTER",
+    "NODE_BEFORE",
+    "NODE_BEFORE_AND_AFTER",
+    "NODE_INSIDE",
+    "NONE",
+    "NON_TRANSIENT_ERR",
+    "NOTATION_NODE",
+    "NOTCH",
+    "NOTEQUAL",
+    "NOT_ALLOWED_ERR",
+    "NOT_FOUND_ERR",
+    "NOT_READABLE_ERR",
+    "NOT_SUPPORTED_ERR",
+    "NO_DATA_ALLOWED_ERR",
+    "NO_ERR",
+    "NO_ERROR",
+    "NO_MODIFICATION_ALLOWED_ERR",
+    "NUMBER_TYPE",
+    "NUM_COMPRESSED_TEXTURE_FORMATS",
+    "NaN",
+    "NamedNodeMap",
+    "NavigateEvent",
+    "Navigation",
+    "NavigationActivation",
+    "NavigationCurrentEntryChangeEvent",
+    "NavigationDestination",
+    "NavigationHistoryEntry",
+    "NavigationPrecommitController",
+    "NavigationPreloadManager",
+    "NavigationTransition",
+    "Navigator",
+    "NavigatorLogin",
+    "NavigatorManagedData",
+    "NavigatorUAData",
+    "NearbyLinks",
+    "NetworkInformation",
+    "Node",
+    "NodeFilter",
+    "NodeIterator",
+    "NodeList",
+    "NotRestoredReasonDetails",
+    "NotRestoredReasons",
+    "Notation",
+    "Notification",
+    "NotifyPaintEvent",
+    "Now",
+    "Number",
+    "NumberFormat",
+    "OBJECT_TYPE",
+    "OBSOLETE",
+    "OK",
+    "ONE",
+    "ONE_MINUS_CONSTANT_ALPHA",
+    "ONE_MINUS_CONSTANT_COLOR",
+    "ONE_MINUS_DST_ALPHA",
+    "ONE_MINUS_DST_COLOR",
+    "ONE_MINUS_SRC_ALPHA",
+    "ONE_MINUS_SRC_COLOR",
+    "OPEN",
+    "OPENED",
+    "OPENING",
+    "ORDERED_NODE_ITERATOR_TYPE",
+    "ORDERED_NODE_SNAPSHOT_TYPE",
+    "OTHER_ERROR",
+    "OTPCredential",
+    "OUT_OF_MEMORY",
+    "Object",
+    "Observable",
+    "OfflineAudioCompletionEvent",
+    "OfflineAudioContext",
+    "OfflineResourceList",
+    "OffscreenCanvas",
+    "OffscreenCanvasRenderingContext2D",
+    "OnClickData",
+    "OnInstalledReason",
+    "OnPerformanceWarningCategory",
+    "OnPerformanceWarningSeverity",
+    "OnRestartRequiredReason",
+    "Option",
+    "OrientationSensor",
+    "OscillatorNode",
+    "OverconstrainedError",
+    "OverflowEvent",
+    "PACK_ALIGNMENT",
+    "PACK_ROW_LENGTH",
+    "PACK_SKIP_PIXELS",
+    "PACK_SKIP_ROWS",
+    "PAGE_RULE",
+    "PARSE_ERR",
+    "PATHSEG_ARC_ABS",
+    "PATHSEG_ARC_REL",
+    "PATHSEG_CLOSEPATH",
+    "PATHSEG_CURVETO_CUBIC_ABS",
+    "PATHSEG_CURVETO_CUBIC_REL",
+    "PATHSEG_CURVETO_CUBIC_SMOOTH_ABS",
+    "PATHSEG_CURVETO_CUBIC_SMOOTH_REL",
+    "PATHSEG_CURVETO_QUADRATIC_ABS",
+    "PATHSEG_CURVETO_QUADRATIC_REL",
+    "PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS",
+    "PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL",
+    "PATHSEG_LINETO_ABS",
+    "PATHSEG_LINETO_HORIZONTAL_ABS",
+    "PATHSEG_LINETO_HORIZONTAL_REL",
+    "PATHSEG_LINETO_REL",
+    "PATHSEG_LINETO_VERTICAL_ABS",
+    "PATHSEG_LINETO_VERTICAL_REL",
+    "PATHSEG_MOVETO_ABS",
+    "PATHSEG_MOVETO_REL",
+    "PATHSEG_UNKNOWN",
+    "PATH_EXISTS_ERR",
+    "PEAKING",
+    "PERMISSION_DENIED",
+    "PERSISTENT",
+    "PI",
+    "PIXEL_PACK_BUFFER",
+    "PIXEL_PACK_BUFFER_BINDING",
+    "PIXEL_UNPACK_BUFFER",
+    "PIXEL_UNPACK_BUFFER_BINDING",
+    "PLAYING_STATE",
+    "POINTS",
+    "POLYGON_OFFSET_FACTOR",
+    "POLYGON_OFFSET_FILL",
+    "POLYGON_OFFSET_UNITS",
+    "POSITION_UNAVAILABLE",
+    "POSITIVE_INFINITY",
+    "PREV",
+    "PREV_NO_DUPLICATE",
+    "PROCESSING_INSTRUCTION_NODE",
+    "PageChangeEvent",
+    "PageRevealEvent",
+    "PageSettings",
+    "PageSwapEvent",
+    "PageTransitionEvent",
+    "PaintRequest",
+    "PaintRequestList",
+    "PannerNode",
+    "PasswordCredential",
+    "Path2D",
+    "PaymentAddress",
+    "PaymentInstruments",
+    "PaymentManager",
+    "PaymentMethodChangeEvent",
+    "PaymentRequest",
+    "PaymentRequestUpdateEvent",
+    "PaymentResponse",
+    "Performance",
+    "PerformanceElementTiming",
+    "PerformanceEntry",
+    "PerformanceEventTiming",
+    "PerformanceLongAnimationFrameTiming",
+    "PerformanceLongTaskTiming",
+    "PerformanceMark",
+    "PerformanceMeasure",
+    "PerformanceNavigation",
+    "PerformanceNavigationTiming",
+    "PerformanceObserver",
+    "PerformanceObserverEntryList",
+    "PerformancePaintTiming",
+    "PerformanceResourceTiming",
+    "PerformanceScriptTiming",
+    "PerformanceServerTiming",
+    "PerformanceTiming",
+    "PeriodicSyncManager",
+    "PeriodicWave",
+    "PermissionStatus",
+    "Permissions",
+    "PhotoCapabilities",
+    "PictureInPictureEvent",
+    "PictureInPictureWindow",
+    "PlainDate",
+    "PlainDateTime",
+    "PlainMonthDay",
+    "PlainTime",
+    "PlainYearMonth",
+    "PlatformArch",
+    "PlatformInfo",
+    "PlatformNaclArch",
+    "PlatformOs",
+    "Plugin",
+    "PluginArray",
+    "PluralRules",
+    "PointerEvent",
+    "PopStateEvent",
+    "PopupBlockedEvent",
+    "Port",
+    "Presentation",
+    "PresentationAvailability",
+    "PresentationConnection",
+    "PresentationConnectionAvailableEvent",
+    "PresentationConnectionCloseEvent",
+    "PresentationConnectionList",
+    "PresentationReceiver",
+    "PresentationRequest",
+    "PressureObserver",
+    "PressureRecord",
+    "ProcessingInstruction",
+    "Profiler",
+    "ProgressEvent",
+    "Promise",
+    "PromiseRejectionEvent",
+    "PropertyNodeList",
+    "ProtectedAudience",
+    "Proxy",
+    "PublicKeyCredential",
+    "PushManager",
+    "PushSubscription",
+    "PushSubscriptionOptions",
+    "Q",
+    "QUERY_RESOLVE",
+    "QUERY_RESULT",
+    "QUERY_RESULT_AVAILABLE",
+    "QUOTA_ERR",
+    "QUOTA_EXCEEDED_ERR",
+    "QueryInterface",
+    "QuotaExceededError",
+    "R11F_G11F_B10F",
+    "R16F",
+    "R16I",
+    "R16UI",
+    "R32F",
+    "R32I",
+    "R32UI",
+    "R8",
+    "R8I",
+    "R8UI",
+    "R8_SNORM",
+    "RASTERIZER_DISCARD",
+    "READ",
+    "READ_BUFFER",
+    "READ_FRAMEBUFFER",
+    "READ_FRAMEBUFFER_BINDING",
+    "READ_ONLY",
+    "READ_ONLY_ERR",
+    "READ_WRITE",
+    "RED",
+    "RED_BITS",
+    "RED_INTEGER",
+    "REMOVAL",
+    "RENDERBUFFER",
+    "RENDERBUFFER_ALPHA_SIZE",
+    "RENDERBUFFER_BINDING",
+    "RENDERBUFFER_BLUE_SIZE",
+    "RENDERBUFFER_DEPTH_SIZE",
+    "RENDERBUFFER_GREEN_SIZE",
+    "RENDERBUFFER_HEIGHT",
+    "RENDERBUFFER_INTERNAL_FORMAT",
+    "RENDERBUFFER_RED_SIZE",
+    "RENDERBUFFER_SAMPLES",
+    "RENDERBUFFER_STENCIL_SIZE",
+    "RENDERBUFFER_WIDTH",
+    "RENDERER",
+    "RENDERING_INTENT_ABSOLUTE_COLORIMETRIC",
+    "RENDERING_INTENT_AUTO",
+    "RENDERING_INTENT_PERCEPTUAL",
+    "RENDERING_INTENT_RELATIVE_COLORIMETRIC",
+    "RENDERING_INTENT_SATURATION",
+    "RENDERING_INTENT_UNKNOWN",
+    "RENDER_ATTACHMENT",
+    "REPEAT",
+    "REPLACE",
+    "RG",
+    "RG16F",
+    "RG16I",
+    "RG16UI",
+    "RG32F",
+    "RG32I",
+    "RG32UI",
+    "RG8",
+    "RG8I",
+    "RG8UI",
+    "RG8_SNORM",
+    "RGB",
+    "RGB10_A2",
+    "RGB10_A2UI",
+    "RGB16F",
+    "RGB16I",
+    "RGB16UI",
+    "RGB32F",
+    "RGB32I",
+    "RGB32UI",
+    "RGB565",
+    "RGB5_A1",
+    "RGB8",
+    "RGB8I",
+    "RGB8UI",
+    "RGB8_SNORM",
+    "RGB9_E5",
+    "RGBA",
+    "RGBA16F",
+    "RGBA16I",
+    "RGBA16UI",
+    "RGBA32F",
+    "RGBA32I",
+    "RGBA32UI",
+    "RGBA4",
+    "RGBA8",
+    "RGBA8I",
+    "RGBA8UI",
+    "RGBA8_SNORM",
+    "RGBA_INTEGER",
+    "RGBColor",
+    "RGB_INTEGER",
+    "RG_INTEGER",
+    "ROTATION_CLOCKWISE",
+    "ROTATION_COUNTERCLOCKWISE",
+    "RTCCertificate",
+    "RTCDTMFSender",
+    "RTCDTMFToneChangeEvent",
+    "RTCDataChannel",
+    "RTCDataChannelEvent",
+    "RTCDtlsTransport",
+    "RTCEncodedAudioFrame",
+    "RTCEncodedVideoFrame",
+    "RTCError",
+    "RTCErrorEvent",
+    "RTCIceCandidate",
+    "RTCIceTransport",
+    "RTCPeerConnection",
+    "RTCPeerConnectionIceErrorEvent",
+    "RTCPeerConnectionIceEvent",
+    "RTCRtpReceiver",
+    "RTCRtpScriptTransform",
+    "RTCRtpSender",
+    "RTCRtpTransceiver",
+    "RTCSctpTransport",
+    "RTCSessionDescription",
+    "RTCStatsReport",
+    "RTCTrackEvent",
+    "RadioNodeList",
+    "Range",
+    "RangeError",
+    "RangeException",
+    "ReadableByteStreamController",
+    "ReadableStream",
+    "ReadableStreamBYOBReader",
+    "ReadableStreamBYOBRequest",
+    "ReadableStreamDefaultController",
+    "ReadableStreamDefaultReader",
+    "RecordErrorEvent",
+    "Rect",
+    "ReferenceError",
+    "Reflect",
+    "RegExp",
+    "RelativeOrientationSensor",
+    "RelativeTimeFormat",
+    "RemotePlayback",
+    "Report",
+    "ReportBody",
+    "ReportingObserver",
+    "Request",
+    "RequestUpdateCheckStatus",
+    "ResizeObserver",
+    "ResizeObserverEntry",
+    "ResizeObserverSize",
+    "Response",
+    "RestrictionTarget",
+    "RuntimeError",
+    "SAMPLER_2D",
+    "SAMPLER_2D_ARRAY",
+    "SAMPLER_2D_ARRAY_SHADOW",
+    "SAMPLER_2D_SHADOW",
+    "SAMPLER_3D",
+    "SAMPLER_BINDING",
+    "SAMPLER_CUBE",
+    "SAMPLER_CUBE_SHADOW",
+    "SAMPLES",
+    "SAMPLE_ALPHA_TO_COVERAGE",
+    "SAMPLE_BUFFERS",
+    "SAMPLE_COVERAGE",
+    "SAMPLE_COVERAGE_INVERT",
+    "SAMPLE_COVERAGE_VALUE",
+    "SAWTOOTH",
+    "SCHEDULED_STATE",
+    "SCISSOR_BOX",
+    "SCISSOR_TEST",
+    "SCROLL_PAGE_DOWN",
+    "SCROLL_PAGE_UP",
+    "SDP_ANSWER",
+    "SDP_OFFER",
+    "SDP_PRANSWER",
+    "SECURITY_ERR",
+    "SELECT",
+    "SEPARATE_ATTRIBS",
+    "SERIALIZE_ERR",
+    "SEVERITY_ERROR",
+    "SEVERITY_FATAL_ERROR",
+    "SEVERITY_WARNING",
+    "SHADER_COMPILER",
+    "SHADER_TYPE",
+    "SHADING_LANGUAGE_VERSION",
+    "SHIFT_MASK",
+    "SHORT",
+    "SHOWING",
+    "SHOW_ALL",
+    "SHOW_ATTRIBUTE",
+    "SHOW_CDATA_SECTION",
+    "SHOW_COMMENT",
+    "SHOW_DOCUMENT",
+    "SHOW_DOCUMENT_FRAGMENT",
+    "SHOW_DOCUMENT_TYPE",
+    "SHOW_ELEMENT",
+    "SHOW_ENTITY",
+    "SHOW_ENTITY_REFERENCE",
+    "SHOW_NOTATION",
+    "SHOW_PROCESSING_INSTRUCTION",
+    "SHOW_TEXT",
+    "SIGNALED",
+    "SIGNED_NORMALIZED",
+    "SINE",
+    "SOUNDFIELD",
+    "SQLException",
+    "SQRT1_2",
+    "SQRT2",
+    "SQUARE",
+    "SRC_ALPHA",
+    "SRC_ALPHA_SATURATE",
+    "SRC_COLOR",
+    "SRGB",
+    "SRGB8",
+    "SRGB8_ALPHA8",
+    "START_TO_END",
+    "START_TO_START",
+    "STATIC_COPY",
+    "STATIC_DRAW",
+    "STATIC_READ",
+    "STENCIL",
+    "STENCIL_ATTACHMENT",
+    "STENCIL_BACK_FAIL",
+    "STENCIL_BACK_FUNC",
+    "STENCIL_BACK_PASS_DEPTH_FAIL",
+    "STENCIL_BACK_PASS_DEPTH_PASS",
+    "STENCIL_BACK_REF",
+    "STENCIL_BACK_VALUE_MASK",
+    "STENCIL_BACK_WRITEMASK",
+    "STENCIL_BITS",
+    "STENCIL_BUFFER_BIT",
+    "STENCIL_CLEAR_VALUE",
+    "STENCIL_FAIL",
+    "STENCIL_FUNC",
+    "STENCIL_INDEX",
+    "STENCIL_INDEX8",
+    "STENCIL_PASS_DEPTH_FAIL",
+    "STENCIL_PASS_DEPTH_PASS",
+    "STENCIL_REF",
+    "STENCIL_TEST",
+    "STENCIL_VALUE_MASK",
+    "STENCIL_WRITEMASK",
+    "STORAGE",
+    "STORAGE_BINDING",
+    "STREAM_COPY",
+    "STREAM_DRAW",
+    "STREAM_READ",
+    "STRING_TYPE",
+    "STYLE_RULE",
+    "SUBPIXEL_BITS",
+    "SUPPORTS_RULE",
+    "SVGAElement",
+    "SVGAltGlyphDefElement",
+    "SVGAltGlyphElement",
+    "SVGAltGlyphItemElement",
+    "SVGAngle",
+    "SVGAnimateColorElement",
+    "SVGAnimateElement",
+    "SVGAnimateMotionElement",
+    "SVGAnimateTransformElement",
+    "SVGAnimatedAngle",
+    "SVGAnimatedBoolean",
+    "SVGAnimatedEnumeration",
+    "SVGAnimatedInteger",
+    "SVGAnimatedLength",
+    "SVGAnimatedLengthList",
+    "SVGAnimatedNumber",
+    "SVGAnimatedNumberList",
+    "SVGAnimatedPreserveAspectRatio",
+    "SVGAnimatedRect",
+    "SVGAnimatedString",
+    "SVGAnimatedTransformList",
+    "SVGAnimationElement",
+    "SVGCircleElement",
+    "SVGClipPathElement",
+    "SVGColor",
+    "SVGComponentTransferFunctionElement",
+    "SVGCursorElement",
+    "SVGDefsElement",
+    "SVGDescElement",
+    "SVGDiscardElement",
+    "SVGDocument",
+    "SVGElement",
+    "SVGElementInstance",
+    "SVGElementInstanceList",
+    "SVGEllipseElement",
+    "SVGException",
+    "SVGFEBlendElement",
+    "SVGFEColorMatrixElement",
+    "SVGFEComponentTransferElement",
+    "SVGFECompositeElement",
+    "SVGFEConvolveMatrixElement",
+    "SVGFEDiffuseLightingElement",
+    "SVGFEDisplacementMapElement",
+    "SVGFEDistantLightElement",
+    "SVGFEDropShadowElement",
+    "SVGFEFloodElement",
+    "SVGFEFuncAElement",
+    "SVGFEFuncBElement",
+    "SVGFEFuncGElement",
+    "SVGFEFuncRElement",
+    "SVGFEGaussianBlurElement",
+    "SVGFEImageElement",
+    "SVGFEMergeElement",
+    "SVGFEMergeNodeElement",
+    "SVGFEMorphologyElement",
+    "SVGFEOffsetElement",
+    "SVGFEPointLightElement",
+    "SVGFESpecularLightingElement",
+    "SVGFESpotLightElement",
+    "SVGFETileElement",
+    "SVGFETurbulenceElement",
+    "SVGFilterElement",
+    "SVGFontElement",
+    "SVGFontFaceElement",
+    "SVGFontFaceFormatElement",
+    "SVGFontFaceNameElement",
+    "SVGFontFaceSrcElement",
+    "SVGFontFaceUriElement",
+    "SVGForeignObjectElement",
+    "SVGGElement",
+    "SVGGeometryElement",
+    "SVGGlyphElement",
+    "SVGGlyphRefElement",
+    "SVGGradientElement",
+    "SVGGraphicsElement",
+    "SVGHKernElement",
+    "SVGImageElement",
+    "SVGLength",
+    "SVGLengthList",
+    "SVGLineElement",
+    "SVGLinearGradientElement",
+    "SVGMPathElement",
+    "SVGMarkerElement",
+    "SVGMaskElement",
+    "SVGMatrix",
+    "SVGMetadataElement",
+    "SVGMissingGlyphElement",
+    "SVGNumber",
+    "SVGNumberList",
+    "SVGPaint",
+    "SVGPathElement",
+    "SVGPathSeg",
+    "SVGPathSegArcAbs",
+    "SVGPathSegArcRel",
+    "SVGPathSegClosePath",
+    "SVGPathSegCurvetoCubicAbs",
+    "SVGPathSegCurvetoCubicRel",
+    "SVGPathSegCurvetoCubicSmoothAbs",
+    "SVGPathSegCurvetoCubicSmoothRel",
+    "SVGPathSegCurvetoQuadraticAbs",
+    "SVGPathSegCurvetoQuadraticRel",
+    "SVGPathSegCurvetoQuadraticSmoothAbs",
+    "SVGPathSegCurvetoQuadraticSmoothRel",
+    "SVGPathSegLinetoAbs",
+    "SVGPathSegLinetoHorizontalAbs",
+    "SVGPathSegLinetoHorizontalRel",
+    "SVGPathSegLinetoRel",
+    "SVGPathSegLinetoVerticalAbs",
+    "SVGPathSegLinetoVerticalRel",
+    "SVGPathSegList",
+    "SVGPathSegMovetoAbs",
+    "SVGPathSegMovetoRel",
+    "SVGPatternElement",
+    "SVGPoint",
+    "SVGPointList",
+    "SVGPolygonElement",
+    "SVGPolylineElement",
+    "SVGPreserveAspectRatio",
+    "SVGRadialGradientElement",
+    "SVGRect",
+    "SVGRectElement",
+    "SVGRenderingIntent",
+    "SVGSVGElement",
+    "SVGScriptElement",
+    "SVGSetElement",
+    "SVGStopElement",
+    "SVGStringList",
+    "SVGStyleElement",
+    "SVGSwitchElement",
+    "SVGSymbolElement",
+    "SVGTRefElement",
+    "SVGTSpanElement",
+    "SVGTextContentElement",
+    "SVGTextElement",
+    "SVGTextPathElement",
+    "SVGTextPositioningElement",
+    "SVGTitleElement",
+    "SVGTransform",
+    "SVGTransformList",
+    "SVGUnitTypes",
+    "SVGUseElement",
+    "SVGVKernElement",
+    "SVGViewElement",
+    "SVGViewSpec",
+    "SVGZoomAndPan",
+    "SVGZoomEvent",
+    "SVG_ANGLETYPE_DEG",
+    "SVG_ANGLETYPE_GRAD",
+    "SVG_ANGLETYPE_RAD",
+    "SVG_ANGLETYPE_UNKNOWN",
+    "SVG_ANGLETYPE_UNSPECIFIED",
+    "SVG_CHANNEL_A",
+    "SVG_CHANNEL_B",
+    "SVG_CHANNEL_G",
+    "SVG_CHANNEL_R",
+    "SVG_CHANNEL_UNKNOWN",
+    "SVG_COLORTYPE_CURRENTCOLOR",
+    "SVG_COLORTYPE_RGBCOLOR",
+    "SVG_COLORTYPE_RGBCOLOR_ICCCOLOR",
+    "SVG_COLORTYPE_UNKNOWN",
+    "SVG_EDGEMODE_DUPLICATE",
+    "SVG_EDGEMODE_NONE",
+    "SVG_EDGEMODE_UNKNOWN",
+    "SVG_EDGEMODE_WRAP",
+    "SVG_FEBLEND_MODE_COLOR",
+    "SVG_FEBLEND_MODE_COLOR_BURN",
+    "SVG_FEBLEND_MODE_COLOR_DODGE",
+    "SVG_FEBLEND_MODE_DARKEN",
+    "SVG_FEBLEND_MODE_DIFFERENCE",
+    "SVG_FEBLEND_MODE_EXCLUSION",
+    "SVG_FEBLEND_MODE_HARD_LIGHT",
+    "SVG_FEBLEND_MODE_HUE",
+    "SVG_FEBLEND_MODE_LIGHTEN",
+    "SVG_FEBLEND_MODE_LUMINOSITY",
+    "SVG_FEBLEND_MODE_MULTIPLY",
+    "SVG_FEBLEND_MODE_NORMAL",
+    "SVG_FEBLEND_MODE_OVERLAY",
+    "SVG_FEBLEND_MODE_SATURATION",
+    "SVG_FEBLEND_MODE_SCREEN",
+    "SVG_FEBLEND_MODE_SOFT_LIGHT",
+    "SVG_FEBLEND_MODE_UNKNOWN",
+    "SVG_FECOLORMATRIX_TYPE_HUEROTATE",
+    "SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA",
+    "SVG_FECOLORMATRIX_TYPE_MATRIX",
+    "SVG_FECOLORMATRIX_TYPE_SATURATE",
+    "SVG_FECOLORMATRIX_TYPE_UNKNOWN",
+    "SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE",
+    "SVG_FECOMPONENTTRANSFER_TYPE_GAMMA",
+    "SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY",
+    "SVG_FECOMPONENTTRANSFER_TYPE_LINEAR",
+    "SVG_FECOMPONENTTRANSFER_TYPE_TABLE",
+    "SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN",
+    "SVG_FECOMPOSITE_OPERATOR_ARITHMETIC",
+    "SVG_FECOMPOSITE_OPERATOR_ATOP",
+    "SVG_FECOMPOSITE_OPERATOR_IN",
+    "SVG_FECOMPOSITE_OPERATOR_LIGHTER",
+    "SVG_FECOMPOSITE_OPERATOR_OUT",
+    "SVG_FECOMPOSITE_OPERATOR_OVER",
+    "SVG_FECOMPOSITE_OPERATOR_UNKNOWN",
+    "SVG_FECOMPOSITE_OPERATOR_XOR",
+    "SVG_INVALID_VALUE_ERR",
+    "SVG_LENGTHTYPE_CM",
+    "SVG_LENGTHTYPE_EMS",
+    "SVG_LENGTHTYPE_EXS",
+    "SVG_LENGTHTYPE_IN",
+    "SVG_LENGTHTYPE_MM",
+    "SVG_LENGTHTYPE_NUMBER",
+    "SVG_LENGTHTYPE_PC",
+    "SVG_LENGTHTYPE_PERCENTAGE",
+    "SVG_LENGTHTYPE_PT",
+    "SVG_LENGTHTYPE_PX",
+    "SVG_LENGTHTYPE_UNKNOWN",
+    "SVG_MARKERUNITS_STROKEWIDTH",
+    "SVG_MARKERUNITS_UNKNOWN",
+    "SVG_MARKERUNITS_USERSPACEONUSE",
+    "SVG_MARKER_ORIENT_ANGLE",
+    "SVG_MARKER_ORIENT_AUTO",
+    "SVG_MARKER_ORIENT_AUTO_START_REVERSE",
+    "SVG_MARKER_ORIENT_UNKNOWN",
+    "SVG_MASKTYPE_ALPHA",
+    "SVG_MASKTYPE_LUMINANCE",
+    "SVG_MATRIX_NOT_INVERTABLE",
+    "SVG_MEETORSLICE_MEET",
+    "SVG_MEETORSLICE_SLICE",
+    "SVG_MEETORSLICE_UNKNOWN",
+    "SVG_MORPHOLOGY_OPERATOR_DILATE",
+    "SVG_MORPHOLOGY_OPERATOR_ERODE",
+    "SVG_MORPHOLOGY_OPERATOR_UNKNOWN",
+    "SVG_PAINTTYPE_CURRENTCOLOR",
+    "SVG_PAINTTYPE_NONE",
+    "SVG_PAINTTYPE_RGBCOLOR",
+    "SVG_PAINTTYPE_RGBCOLOR_ICCCOLOR",
+    "SVG_PAINTTYPE_UNKNOWN",
+    "SVG_PAINTTYPE_URI",
+    "SVG_PAINTTYPE_URI_CURRENTCOLOR",
+    "SVG_PAINTTYPE_URI_NONE",
+    "SVG_PAINTTYPE_URI_RGBCOLOR",
+    "SVG_PAINTTYPE_URI_RGBCOLOR_ICCCOLOR",
+    "SVG_PRESERVEASPECTRATIO_NONE",
+    "SVG_PRESERVEASPECTRATIO_UNKNOWN",
+    "SVG_PRESERVEASPECTRATIO_XMAXYMAX",
+    "SVG_PRESERVEASPECTRATIO_XMAXYMID",
+    "SVG_PRESERVEASPECTRATIO_XMAXYMIN",
+    "SVG_PRESERVEASPECTRATIO_XMIDYMAX",
+    "SVG_PRESERVEASPECTRATIO_XMIDYMID",
+    "SVG_PRESERVEASPECTRATIO_XMIDYMIN",
+    "SVG_PRESERVEASPECTRATIO_XMINYMAX",
+    "SVG_PRESERVEASPECTRATIO_XMINYMID",
+    "SVG_PRESERVEASPECTRATIO_XMINYMIN",
+    "SVG_SPREADMETHOD_PAD",
+    "SVG_SPREADMETHOD_REFLECT",
+    "SVG_SPREADMETHOD_REPEAT",
+    "SVG_SPREADMETHOD_UNKNOWN",
+    "SVG_STITCHTYPE_NOSTITCH",
+    "SVG_STITCHTYPE_STITCH",
+    "SVG_STITCHTYPE_UNKNOWN",
+    "SVG_TRANSFORM_MATRIX",
+    "SVG_TRANSFORM_ROTATE",
+    "SVG_TRANSFORM_SCALE",
+    "SVG_TRANSFORM_SKEWX",
+    "SVG_TRANSFORM_SKEWY",
+    "SVG_TRANSFORM_TRANSLATE",
+    "SVG_TRANSFORM_UNKNOWN",
+    "SVG_TURBULENCE_TYPE_FRACTALNOISE",
+    "SVG_TURBULENCE_TYPE_TURBULENCE",
+    "SVG_TURBULENCE_TYPE_UNKNOWN",
+    "SVG_UNIT_TYPE_OBJECTBOUNDINGBOX",
+    "SVG_UNIT_TYPE_UNKNOWN",
+    "SVG_UNIT_TYPE_USERSPACEONUSE",
+    "SVG_WRONG_TYPE_ERR",
+    "SVG_ZOOMANDPAN_DISABLE",
+    "SVG_ZOOMANDPAN_MAGNIFY",
+    "SVG_ZOOMANDPAN_UNKNOWN",
+    "SYNC_CONDITION",
+    "SYNC_FENCE",
+    "SYNC_FLAGS",
+    "SYNC_FLUSH_COMMANDS_BIT",
+    "SYNC_GPU_COMMANDS_COMPLETE",
+    "SYNC_STATUS",
+    "SYNTAX_ERR",
+    "SavedPages",
+    "Scheduler",
+    "Scheduling",
+    "Screen",
+    "ScreenDetailed",
+    "ScreenDetails",
+    "ScreenOrientation",
+    "Script",
+    "ScriptProcessorNode",
+    "ScrollAreaEvent",
+    "ScrollTimeline",
+    "SecurityPolicyViolationEvent",
+    "Segmenter",
+    "Selection",
+    "Sensor",
+    "SensorErrorEvent",
+    "Serial",
+    "SerialPort",
+    "ServiceWorker",
+    "ServiceWorkerContainer",
+    "ServiceWorkerRegistration",
+    "SessionDescription",
+    "Set",
+    "ShadowRoot",
+    "SharedArrayBuffer",
+    "SharedStorage",
+    "SharedStorageAppendMethod",
+    "SharedStorageClearMethod",
+    "SharedStorageDeleteMethod",
+    "SharedStorageModifierMethod",
+    "SharedStorageSetMethod",
+    "SharedStorageWorklet",
+    "SharedWorker",
+    "SharingState",
+    "SimpleGestureEvent",
+    "SnapEvent",
+    "SourceBuffer",
+    "SourceBufferList",
+    "SpeechGrammar",
+    "SpeechGrammarList",
+    "SpeechRecognition",
+    "SpeechRecognitionErrorEvent",
+    "SpeechRecognitionEvent",
+    "SpeechRecognitionPhrase",
+    "SpeechSynthesis",
+    "SpeechSynthesisErrorEvent",
+    "SpeechSynthesisEvent",
+    "SpeechSynthesisUtterance",
+    "SpeechSynthesisVoice",
+    "StaticRange",
+    "StereoPannerNode",
+    "StopIteration",
+    "Storage",
+    "StorageBucket",
+    "StorageBucketManager",
+    "StorageEvent",
+    "StorageManager",
+    "String",
+    "StructType",
+    "StylePropertyMap",
+    "StylePropertyMapReadOnly",
+    "StyleSheet",
+    "StyleSheetList",
+    "SubmitEvent",
+    "Subscriber",
+    "SubtleCrypto",
+    "Summarizer",
+    "SuppressedError",
+    "SuspendError",
+    "Suspending",
+    "Symbol",
+    "SyncManager",
+    "SyntaxError",
+    "TAB_ID_NONE",
+    "TAB_INDEX_NONE",
+    "TEMPORARY",
+    "TEXTPATH_METHODTYPE_ALIGN",
+    "TEXTPATH_METHODTYPE_STRETCH",
+    "TEXTPATH_METHODTYPE_UNKNOWN",
+    "TEXTPATH_SPACINGTYPE_AUTO",
+    "TEXTPATH_SPACINGTYPE_EXACT",
+    "TEXTPATH_SPACINGTYPE_UNKNOWN",
+    "TEXTURE",
+    "TEXTURE0",
+    "TEXTURE1",
+    "TEXTURE10",
+    "TEXTURE11",
+    "TEXTURE12",
+    "TEXTURE13",
+    "TEXTURE14",
+    "TEXTURE15",
+    "TEXTURE16",
+    "TEXTURE17",
+    "TEXTURE18",
+    "TEXTURE19",
+    "TEXTURE2",
+    "TEXTURE20",
+    "TEXTURE21",
+    "TEXTURE22",
+    "TEXTURE23",
+    "TEXTURE24",
+    "TEXTURE25",
+    "TEXTURE26",
+    "TEXTURE27",
+    "TEXTURE28",
+    "TEXTURE29",
+    "TEXTURE3",
+    "TEXTURE30",
+    "TEXTURE31",
+    "TEXTURE4",
+    "TEXTURE5",
+    "TEXTURE6",
+    "TEXTURE7",
+    "TEXTURE8",
+    "TEXTURE9",
+    "TEXTURE_2D",
+    "TEXTURE_2D_ARRAY",
+    "TEXTURE_3D",
+    "TEXTURE_BASE_LEVEL",
+    "TEXTURE_BINDING",
+    "TEXTURE_BINDING_2D",
+    "TEXTURE_BINDING_2D_ARRAY",
+    "TEXTURE_BINDING_3D",
+    "TEXTURE_BINDING_CUBE_MAP",
+    "TEXTURE_COMPARE_FUNC",
+    "TEXTURE_COMPARE_MODE",
+    "TEXTURE_CUBE_MAP",
+    "TEXTURE_CUBE_MAP_NEGATIVE_X",
+    "TEXTURE_CUBE_MAP_NEGATIVE_Y",
+    "TEXTURE_CUBE_MAP_NEGATIVE_Z",
+    "TEXTURE_CUBE_MAP_POSITIVE_X",
+    "TEXTURE_CUBE_MAP_POSITIVE_Y",
+    "TEXTURE_CUBE_MAP_POSITIVE_Z",
+    "TEXTURE_IMMUTABLE_FORMAT",
+    "TEXTURE_IMMUTABLE_LEVELS",
+    "TEXTURE_MAG_FILTER",
+    "TEXTURE_MAX_ANISOTROPY_EXT",
+    "TEXTURE_MAX_LEVEL",
+    "TEXTURE_MAX_LOD",
+    "TEXTURE_MIN_FILTER",
+    "TEXTURE_MIN_LOD",
+    "TEXTURE_WRAP_R",
+    "TEXTURE_WRAP_S",
+    "TEXTURE_WRAP_T",
+    "TEXT_NODE",
+    "TIMEOUT",
+    "TIMEOUT_ERR",
+    "TIMEOUT_EXPIRED",
+    "TIMEOUT_IGNORED",
+    "TOO_LARGE_ERR",
+    "TRANSACTION_INACTIVE_ERR",
+    "TRANSFORM_FEEDBACK",
+    "TRANSFORM_FEEDBACK_ACTIVE",
+    "TRANSFORM_FEEDBACK_BINDING",
+    "TRANSFORM_FEEDBACK_BUFFER",
+    "TRANSFORM_FEEDBACK_BUFFER_BINDING",
+    "TRANSFORM_FEEDBACK_BUFFER_MODE",
+    "TRANSFORM_FEEDBACK_BUFFER_SIZE",
+    "TRANSFORM_FEEDBACK_BUFFER_START",
+    "TRANSFORM_FEEDBACK_PAUSED",
+    "TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN",
+    "TRANSFORM_FEEDBACK_VARYINGS",
+    "TRIANGLE",
+    "TRIANGLES",
+    "TRIANGLE_FAN",
+    "TRIANGLE_STRIP",
+    "TYPE_BACK_FORWARD",
+    "TYPE_ERR",
+    "TYPE_MISMATCH_ERR",
+    "TYPE_NAVIGATE",
+    "TYPE_RELOAD",
+    "TYPE_RESERVED",
+    "Tab",
+    "TabStatus",
+    "Table",
+    "Tag",
+    "TaskAttributionTiming",
+    "TaskController",
+    "TaskPriorityChangeEvent",
+    "TaskSignal",
+    "Temporal",
+    "Text",
+    "TextDecoder",
+    "TextDecoderStream",
+    "TextEncoder",
+    "TextEncoderStream",
+    "TextEvent",
+    "TextFormat",
+    "TextFormatUpdateEvent",
+    "TextMetrics",
+    "TextTrack",
+    "TextTrackCue",
+    "TextTrackCueList",
+    "TextTrackList",
+    "TextUpdateEvent",
+    "TimeEvent",
+    "TimeRanges",
+    "ToggleEvent",
+    "Touch",
+    "TouchEvent",
+    "TouchList",
+    "TrackEvent",
+    "TransformStream",
+    "TransformStreamDefaultController",
+    "TransitionEvent",
+    "Translator",
+    "TreeWalker",
+    "TrustedHTML",
+    "TrustedScript",
+    "TrustedScriptURL",
+    "TrustedTypePolicy",
+    "TrustedTypePolicyFactory",
+    "TypeError",
+    "TypedObject",
+    "U2F",
+    "UIEvent",
+    "UNCACHED",
+    "UNIFORM",
+    "UNIFORM_ARRAY_STRIDE",
+    "UNIFORM_BLOCK_ACTIVE_UNIFORMS",
+    "UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES",
+    "UNIFORM_BLOCK_BINDING",
+    "UNIFORM_BLOCK_DATA_SIZE",
+    "UNIFORM_BLOCK_INDEX",
+    "UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER",
+    "UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER",
+    "UNIFORM_BUFFER",
+    "UNIFORM_BUFFER_BINDING",
+    "UNIFORM_BUFFER_OFFSET_ALIGNMENT",
+    "UNIFORM_BUFFER_SIZE",
+    "UNIFORM_BUFFER_START",
+    "UNIFORM_IS_ROW_MAJOR",
+    "UNIFORM_MATRIX_STRIDE",
+    "UNIFORM_OFFSET",
+    "UNIFORM_SIZE",
+    "UNIFORM_TYPE",
+    "UNKNOWN_ERR",
+    "UNKNOWN_RULE",
+    "UNMASKED_RENDERER_WEBGL",
+    "UNMASKED_VENDOR_WEBGL",
+    "UNORDERED_NODE_ITERATOR_TYPE",
+    "UNORDERED_NODE_SNAPSHOT_TYPE",
+    "UNPACK_ALIGNMENT",
+    "UNPACK_COLORSPACE_CONVERSION_WEBGL",
+    "UNPACK_FLIP_Y_WEBGL",
+    "UNPACK_IMAGE_HEIGHT",
+    "UNPACK_PREMULTIPLY_ALPHA_WEBGL",
+    "UNPACK_ROW_LENGTH",
+    "UNPACK_SKIP_IMAGES",
+    "UNPACK_SKIP_PIXELS",
+    "UNPACK_SKIP_ROWS",
+    "UNSCHEDULED_STATE",
+    "UNSENT",
+    "UNSIGNALED",
+    "UNSIGNED_BYTE",
+    "UNSIGNED_INT",
+    "UNSIGNED_INT_10F_11F_11F_REV",
+    "UNSIGNED_INT_24_8",
+    "UNSIGNED_INT_2_10_10_10_REV",
+    "UNSIGNED_INT_5_9_9_9_REV",
+    "UNSIGNED_INT_SAMPLER_2D",
+    "UNSIGNED_INT_SAMPLER_2D_ARRAY",
+    "UNSIGNED_INT_SAMPLER_3D",
+    "UNSIGNED_INT_SAMPLER_CUBE",
+    "UNSIGNED_INT_VEC2",
+    "UNSIGNED_INT_VEC3",
+    "UNSIGNED_INT_VEC4",
+    "UNSIGNED_NORMALIZED",
+    "UNSIGNED_SHORT",
+    "UNSIGNED_SHORT_4_4_4_4",
+    "UNSIGNED_SHORT_5_5_5_1",
+    "UNSIGNED_SHORT_5_6_5",
+    "UNSPECIFIED_EVENT_TYPE_ERR",
+    "UPDATEREADY",
+    "URIError",
+    "URL",
+    "URLPattern",
+    "URLSearchParams",
+    "URLUnencoded",
+    "URL_MISMATCH_ERR",
+    "USB",
+    "USBAlternateInterface",
+    "USBConfiguration",
+    "USBConnectionEvent",
+    "USBDevice",
+    "USBEndpoint",
+    "USBInTransferResult",
+    "USBInterface",
+    "USBIsochronousInTransferPacket",
+    "USBIsochronousInTransferResult",
+    "USBIsochronousOutTransferPacket",
+    "USBIsochronousOutTransferResult",
+    "USBOutTransferResult",
+    "UTC",
+    "Uint16Array",
+    "Uint32Array",
+    "Uint8Array",
+    "Uint8ClampedArray",
+    "UpdateFilter",
+    "UpdatePropertyName",
+    "UserActivation",
+    "UserMessageHandler",
+    "UserMessageHandlersNamespace",
+    "UserProximityEvent",
+    "VALIDATE_STATUS",
+    "VALIDATION_ERR",
+    "VARIABLES_RULE",
+    "VENDOR",
+    "VERSION",
+    "VERSION_CHANGE",
+    "VERSION_ERR",
+    "VERTEX",
+    "VERTEX_ARRAY_BINDING",
+    "VERTEX_ATTRIB_ARRAY_BUFFER_BINDING",
+    "VERTEX_ATTRIB_ARRAY_DIVISOR",
+    "VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE",
+    "VERTEX_ATTRIB_ARRAY_ENABLED",
+    "VERTEX_ATTRIB_ARRAY_INTEGER",
+    "VERTEX_ATTRIB_ARRAY_NORMALIZED",
+    "VERTEX_ATTRIB_ARRAY_POINTER",
+    "VERTEX_ATTRIB_ARRAY_SIZE",
+    "VERTEX_ATTRIB_ARRAY_STRIDE",
+    "VERTEX_ATTRIB_ARRAY_TYPE",
+    "VERTEX_SHADER",
+    "VERTICAL",
+    "VERTICAL_AXIS",
+    "VER_ERR",
+    "VIEWPORT",
+    "VIEWPORT_RULE",
+    "VRDisplay",
+    "VRDisplayCapabilities",
+    "VRDisplayEvent",
+    "VREyeParameters",
+    "VRFieldOfView",
+    "VRFrameData",
+    "VRPose",
+    "VRStageParameters",
+    "VTTCue",
+    "VTTRegion",
+    "ValidityState",
+    "VideoColorSpace",
+    "VideoDecoder",
+    "VideoEncoder",
+    "VideoFrame",
+    "VideoPlaybackQuality",
+    "VideoStreamTrack",
+    "ViewTimeline",
+    "ViewTransition",
+    "ViewTransitionTypeSet",
+    "ViewType",
+    "Viewport",
+    "VirtualKeyboard",
+    "VirtualKeyboardGeometryChangeEvent",
+    "VisibilityStateEntry",
+    "VisualViewport",
+    "WAIT_FAILED",
+    "WEBKIT_FILTER_RULE",
+    "WEBKIT_KEYFRAMES_RULE",
+    "WEBKIT_KEYFRAME_RULE",
+    "WEBKIT_REGION_RULE",
+    "WGSLLanguageFeatures",
+    "WINDOW_ID_CURRENT",
+    "WINDOW_ID_NONE",
+    "WRITE",
+    "WRONG_DOCUMENT_ERR",
+    "WakeLock",
+    "WakeLockSentinel",
+    "WasmAnyRef",
+    "WaveShaperNode",
+    "WeakMap",
+    "WeakRef",
+    "WeakSet",
+    "WebAssembly",
+    "WebGL2RenderingContext",
+    "WebGLActiveInfo",
+    "WebGLBuffer",
+    "WebGLContextEvent",
+    "WebGLFramebuffer",
+    "WebGLObject",
+    "WebGLProgram",
+    "WebGLQuery",
+    "WebGLRenderbuffer",
+    "WebGLRenderingContext",
+    "WebGLSampler",
+    "WebGLShader",
+    "WebGLShaderPrecisionFormat",
+    "WebGLSync",
+    "WebGLTexture",
+    "WebGLTransformFeedback",
+    "WebGLUniformLocation",
+    "WebGLVertexArray",
+    "WebGLVertexArrayObject",
+    "WebKitAnimationEvent",
+    "WebKitBlobBuilder",
+    "WebKitCSSFilterRule",
+    "WebKitCSSFilterValue",
+    "WebKitCSSKeyframeRule",
+    "WebKitCSSKeyframesRule",
+    "WebKitCSSMatrix",
+    "WebKitCSSRegionRule",
+    "WebKitCSSTransformValue",
+    "WebKitDataCue",
+    "WebKitGamepad",
+    "WebKitMediaKeyError",
+    "WebKitMediaKeyMessageEvent",
+    "WebKitMediaKeySession",
+    "WebKitMediaKeys",
+    "WebKitMediaSource",
+    "WebKitMutationObserver",
+    "WebKitNamespace",
+    "WebKitPlaybackTargetAvailabilityEvent",
+    "WebKitPoint",
+    "WebKitShadowRoot",
+    "WebKitSourceBuffer",
+    "WebKitSourceBufferList",
+    "WebKitTransitionEvent",
+    "WebSocket",
+    "WebSocketError",
+    "WebSocketStream",
+    "WebTransport",
+    "WebTransportBidirectionalStream",
+    "WebTransportDatagramDuplexStream",
+    "WebTransportError",
+    "WebTransportReceiveStream",
+    "WebTransportSendStream",
+    "WebkitAlignContent",
+    "WebkitAlignItems",
+    "WebkitAlignSelf",
+    "WebkitAnimation",
+    "WebkitAnimationDelay",
+    "WebkitAnimationDirection",
+    "WebkitAnimationDuration",
+    "WebkitAnimationFillMode",
+    "WebkitAnimationIterationCount",
+    "WebkitAnimationName",
+    "WebkitAnimationPlayState",
+    "WebkitAnimationTimingFunction",
+    "WebkitAppearance",
+    "WebkitBackfaceVisibility",
+    "WebkitBackgroundClip",
+    "WebkitBackgroundOrigin",
+    "WebkitBackgroundSize",
+    "WebkitBorderBottomLeftRadius",
+    "WebkitBorderBottomRightRadius",
+    "WebkitBorderImage",
+    "WebkitBorderRadius",
+    "WebkitBorderTopLeftRadius",
+    "WebkitBorderTopRightRadius",
+    "WebkitBoxAlign",
+    "WebkitBoxDirection",
+    "WebkitBoxFlex",
+    "WebkitBoxOrdinalGroup",
+    "WebkitBoxOrient",
+    "WebkitBoxPack",
+    "WebkitBoxShadow",
+    "WebkitBoxSizing",
+    "WebkitClipPath",
+    "WebkitFilter",
+    "WebkitFlex",
+    "WebkitFlexBasis",
+    "WebkitFlexDirection",
+    "WebkitFlexFlow",
+    "WebkitFlexGrow",
+    "WebkitFlexShrink",
+    "WebkitFlexWrap",
+    "WebkitFontFeatureSettings",
+    "WebkitJustifyContent",
+    "WebkitLineClamp",
+    "WebkitMask",
+    "WebkitMaskClip",
+    "WebkitMaskComposite",
+    "WebkitMaskImage",
+    "WebkitMaskOrigin",
+    "WebkitMaskPosition",
+    "WebkitMaskPositionX",
+    "WebkitMaskPositionY",
+    "WebkitMaskRepeat",
+    "WebkitMaskSize",
+    "WebkitOrder",
+    "WebkitPerspective",
+    "WebkitPerspectiveOrigin",
+    "WebkitTextFillColor",
+    "WebkitTextSecurity",
+    "WebkitTextSizeAdjust",
+    "WebkitTextStroke",
+    "WebkitTextStrokeColor",
+    "WebkitTextStrokeWidth",
+    "WebkitTransform",
+    "WebkitTransformOrigin",
+    "WebkitTransformStyle",
+    "WebkitTransition",
+    "WebkitTransitionDelay",
+    "WebkitTransitionDuration",
+    "WebkitTransitionProperty",
+    "WebkitTransitionTimingFunction",
+    "WebkitUserSelect",
+    "WheelEvent",
+    "Window",
+    "WindowControlsOverlay",
+    "WindowControlsOverlayGeometryChangeEvent",
+    "WindowState",
+    "WindowType",
+    "Worker",
+    "Worklet",
+    "WritableStream",
+    "WritableStreamDefaultController",
+    "WritableStreamDefaultWriter",
+    "XMLDocument",
+    "XMLHttpRequest",
+    "XMLHttpRequestEventTarget",
+    "XMLHttpRequestException",
+    "XMLHttpRequestProgressEvent",
+    "XMLHttpRequestUpload",
+    "XMLSerializer",
+    "XMLStylesheetProcessingInstruction",
+    "XPathEvaluator",
+    "XPathException",
+    "XPathExpression",
+    "XPathNSResolver",
+    "XPathResult",
+    "XRAnchor",
+    "XRAnchorSet",
+    "XRBoundedReferenceSpace",
+    "XRCPUDepthInformation",
+    "XRCamera",
+    "XRDOMOverlayState",
+    "XRDepthInformation",
+    "XRFrame",
+    "XRHand",
+    "XRHitTestResult",
+    "XRHitTestSource",
+    "XRInputSource",
+    "XRInputSourceArray",
+    "XRInputSourceEvent",
+    "XRInputSourcesChangeEvent",
+    "XRJointPose",
+    "XRJointSpace",
+    "XRLayer",
+    "XRLightEstimate",
+    "XRLightProbe",
+    "XRPose",
+    "XRRay",
+    "XRReferenceSpace",
+    "XRReferenceSpaceEvent",
+    "XRRenderState",
+    "XRRigidTransform",
+    "XRSession",
+    "XRSessionEvent",
+    "XRSpace",
+    "XRSystem",
+    "XRTransientInputHitTestResult",
+    "XRTransientInputHitTestSource",
+    "XRView",
+    "XRViewerPose",
+    "XRViewport",
+    "XRWebGLBinding",
+    "XRWebGLDepthInformation",
+    "XRWebGLLayer",
+    "XSLTProcessor",
+    "ZERO",
+    "ZonedDateTime",
+    "ZoomSettings",
+    "ZoomSettingsMode",
+    "ZoomSettingsScope",
+    "_XD0M_",
+    "_YD0M_",
+    "__REACT_DEVTOOLS_GLOBAL_HOOK__",
+    "__brand",
+    "__defineGetter__",
+    "__defineSetter__",
+    "__lookupGetter__",
+    "__lookupSetter__",
+    "__opera",
+    "__proto__",
+    "_browserjsran",
+    "a",
+    "aLink",
+    "abbr",
+    "abort",
+    "aborted",
+    "aboutConfigPrefs",
+    "abs",
+    "absolute",
+    "acceleration",
+    "accelerationIncludingGravity",
+    "accelerator",
+    "accent-color",
+    "accentColor",
+    "accept",
+    "acceptCharset",
+    "acceptNode",
+    "access",
+    "accessKey",
+    "accessKeyLabel",
+    "accuracy",
+    "acos",
+    "acosh",
+    "action",
+    "actionURL",
+    "actions",
+    "activated",
+    "activation",
+    "activationStart",
+    "active",
+    "activeCues",
+    "activeElement",
+    "activeSourceBuffers",
+    "activeSourceCount",
+    "activeTexture",
+    "activeVRDisplays",
+    "activeViewTransition",
+    "activityLog",
+    "actualBoundingBoxAscent",
+    "actualBoundingBoxDescent",
+    "actualBoundingBoxLeft",
+    "actualBoundingBoxRight",
+    "adAuctionComponents",
+    "adAuctionHeaders",
+    "adapterInfo",
+    "add",
+    "addAll",
+    "addBehavior",
+    "addCandidate",
+    "addColorStop",
+    "addCue",
+    "addElement",
+    "addEventListener",
+    "addFilter",
+    "addFromString",
+    "addFromUri",
+    "addIceCandidate",
+    "addImport",
+    "addListener",
+    "addModule",
+    "addNamed",
+    "addPageRule",
+    "addPath",
+    "addPointer",
+    "addRange",
+    "addRegion",
+    "addRule",
+    "addSearchEngine",
+    "addSourceBuffer",
+    "addStream",
+    "addTeardown",
+    "addTextTrack",
+    "addTrack",
+    "addTransceiver",
+    "addWakeLockListener",
+    "added",
+    "addedNodes",
+    "additionalName",
+    "additiveSymbols",
+    "addons",
+    "address",
+    "addressLine",
+    "addressModeU",
+    "addressModeV",
+    "addressModeW",
+    "adopt",
+    "adoptNode",
+    "adoptedCallback",
+    "adoptedStyleSheets",
+    "adr",
+    "advance",
+    "after",
+    "alarms",
+    "album",
+    "alert",
+    "algorithm",
+    "align",
+    "align-content",
+    "align-items",
+    "align-self",
+    "alignContent",
+    "alignItems",
+    "alignSelf",
+    "alignmentBaseline",
+    "alinkColor",
+    "all",
+    "allSettled",
+    "allocationSize",
+    "allow",
+    "allowFullscreen",
+    "allowPaymentRequest",
+    "allowedDirections",
+    "allowedFeatures",
+    "allowedToPlay",
+    "allowsFeature",
+    "alpha",
+    "alphaMode",
+    "alphaToCoverageEnabled",
+    "alphabeticBaseline",
+    "alt",
+    "altGraphKey",
+    "altHtml",
+    "altKey",
+    "altLeft",
+    "alternate",
+    "alternateSetting",
+    "alternates",
+    "altitude",
+    "altitudeAccuracy",
+    "altitudeAngle",
+    "amplitude",
+    "ancestorOrigins",
+    "anchor",
+    "anchorName",
+    "anchorNode",
+    "anchorOffset",
+    "anchorScope",
+    "anchorSpace",
+    "anchors",
+    "and",
+    "angle",
+    "angularAcceleration",
+    "angularVelocity",
+    "animVal",
+    "animate",
+    "animated",
+    "animatedInstanceRoot",
+    "animatedNormalizedPathSegList",
+    "animatedPathSegList",
+    "animatedPoints",
+    "animation",
+    "animation-composition",
+    "animation-delay",
+    "animation-direction",
+    "animation-duration",
+    "animation-fill-mode",
+    "animation-iteration-count",
+    "animation-name",
+    "animation-play-state",
+    "animation-timing-function",
+    "animationComposition",
+    "animationDelay",
+    "animationDirection",
+    "animationDuration",
+    "animationFillMode",
+    "animationIterationCount",
+    "animationName",
+    "animationPlayState",
+    "animationStartTime",
+    "animationTimingFunction",
+    "animationsPaused",
+    "anniversary",
+    "annotation",
+    "antialias",
+    "anticipatedRemoval",
+    "any",
+    "app",
+    "appCodeName",
+    "appMinorVersion",
+    "appName",
+    "appNotifications",
+    "appVersion",
+    "appearance",
+    "append",
+    "appendBuffer",
+    "appendChild",
+    "appendData",
+    "appendItem",
+    "appendMedium",
+    "appendNamed",
+    "appendRule",
+    "appendStream",
+    "appendWindowEnd",
+    "appendWindowStart",
+    "applets",
+    "applicationCache",
+    "applicationServerKey",
+    "apply",
+    "applyConstraints",
+    "applyElement",
+    "arc",
+    "arcTo",
+    "arch",
+    "architecture",
+    "archive",
+    "areas",
+    "arguments",
+    "ariaActiveDescendantElement",
+    "ariaAtomic",
+    "ariaAutoComplete",
+    "ariaBrailleLabel",
+    "ariaBrailleRoleDescription",
+    "ariaBusy",
+    "ariaChecked",
+    "ariaColCount",
+    "ariaColIndex",
+    "ariaColIndexText",
+    "ariaColSpan",
+    "ariaControlsElements",
+    "ariaCurrent",
+    "ariaDescribedByElements",
+    "ariaDescription",
+    "ariaDetailsElements",
+    "ariaDisabled",
+    "ariaErrorMessageElements",
+    "ariaExpanded",
+    "ariaFlowToElements",
+    "ariaHasPopup",
+    "ariaHidden",
+    "ariaInvalid",
+    "ariaKeyShortcuts",
+    "ariaLabel",
+    "ariaLabelledByElements",
+    "ariaLevel",
+    "ariaLive",
+    "ariaModal",
+    "ariaMultiLine",
+    "ariaMultiSelectable",
+    "ariaNotify",
+    "ariaOrientation",
+    "ariaOwnsElements",
+    "ariaPlaceholder",
+    "ariaPosInSet",
+    "ariaPressed",
+    "ariaReadOnly",
+    "ariaRelevant",
+    "ariaRequired",
+    "ariaRoleDescription",
+    "ariaRowCount",
+    "ariaRowIndex",
+    "ariaRowIndexText",
+    "ariaRowSpan",
+    "ariaSelected",
+    "ariaSetSize",
+    "ariaSort",
+    "ariaValueMax",
+    "ariaValueMin",
+    "ariaValueNow",
+    "ariaValueText",
+    "arrayBuffer",
+    "arrayLayerCount",
+    "arrayStride",
+    "artist",
+    "artwork",
+    "as",
+    "asIntN",
+    "asUintN",
+    "ascentOverride",
+    "asin",
+    "asinh",
+    "aspect",
+    "aspect-ratio",
+    "aspectRatio",
+    "assert",
+    "assign",
+    "assignedElements",
+    "assignedNodes",
+    "assignedSlot",
+    "async",
+    "asyncDispose",
+    "asyncIterator",
+    "at",
+    "atEnd",
+    "atan",
+    "atan2",
+    "atanh",
+    "atob",
+    "attachEvent",
+    "attachInternals",
+    "attachShader",
+    "attachShadow",
+    "attachedElements",
+    "attachments",
+    "attack",
+    "attestationObject",
+    "attrChange",
+    "attrName",
+    "attributeChangedCallback",
+    "attributeFilter",
+    "attributeName",
+    "attributeNamespace",
+    "attributeOldValue",
+    "attributeStyleMap",
+    "attributes",
+    "attribution",
+    "attributionSrc",
+    "audioBitrateMode",
+    "audioBitsPerSecond",
+    "audioTracks",
+    "audioWorklet",
+    "authenticatedSignedWrites",
+    "authenticatorAttachment",
+    "authenticatorData",
+    "autoIncrement",
+    "autobuffer",
+    "autocapitalize",
+    "autocomplete",
+    "autocorrect",
+    "autofocus",
+    "automationRate",
+    "autoplay",
+    "availHeight",
+    "availLeft",
+    "availTop",
+    "availWidth",
+    "availability",
+    "available",
+    "averageLatency",
+    "aversion",
+    "ax",
+    "axes",
+    "axis",
+    "ay",
+    "azimuth",
+    "azimuthAngle",
+    "b",
+    "back",
+    "backdrop-filter",
+    "backdropFilter",
+    "backends",
+    "backface-visibility",
+    "backfaceVisibility",
+    "background",
+    "background-attachment",
+    "background-blend-mode",
+    "background-clip",
+    "background-color",
+    "background-image",
+    "background-origin",
+    "background-position",
+    "background-position-x",
+    "background-position-y",
+    "background-repeat",
+    "background-size",
+    "backgroundAttachment",
+    "backgroundBlendMode",
+    "backgroundClip",
+    "backgroundColor",
+    "backgroundFetch",
+    "backgroundImage",
+    "backgroundOrigin",
+    "backgroundPosition",
+    "backgroundPositionX",
+    "backgroundPositionY",
+    "backgroundRepeat",
+    "backgroundSize",
+    "badInput",
+    "badge",
+    "balance",
+    "baseArrayLayer",
+    "baseFrequencyX",
+    "baseFrequencyY",
+    "baseLatency",
+    "baseLayer",
+    "baseMipLevel",
+    "baseNode",
+    "baseOffset",
+    "basePalette",
+    "baseURI",
+    "baseVal",
+    "baseline-source",
+    "baselineShift",
+    "baselineSource",
+    "batchUpdate",
+    "battery",
+    "bday",
+    "before",
+    "beginComputePass",
+    "beginElement",
+    "beginElementAt",
+    "beginOcclusionQuery",
+    "beginPath",
+    "beginQuery",
+    "beginRenderPass",
+    "beginTransformFeedback",
+    "beginningOfPassWriteIndex",
+    "behavior",
+    "behaviorCookie",
+    "behaviorPart",
+    "behaviorUrns",
+    "beta",
+    "bezierCurveTo",
+    "bgColor",
+    "bgProperties",
+    "bias",
+    "big",
+    "bigint64",
+    "biguint64",
+    "binaryType",
+    "bind",
+    "bindAttribLocation",
+    "bindBuffer",
+    "bindBufferBase",
+    "bindBufferRange",
+    "bindFramebuffer",
+    "bindGroupLayouts",
+    "bindRenderbuffer",
+    "bindSampler",
+    "bindTexture",
+    "bindTransformFeedback",
+    "bindVertexArray",
+    "binding",
+    "bitness",
+    "blend",
+    "blendColor",
+    "blendEquation",
+    "blendEquationSeparate",
+    "blendFunc",
+    "blendFuncSeparate",
+    "blink",
+    "blitFramebuffer",
+    "blob",
+    "block-size",
+    "blockDirection",
+    "blockSize",
+    "blockedURI",
+    "blockedURL",
+    "blocking",
+    "blockingDuration",
+    "blue",
+    "bluetooth",
+    "blur",
+    "body",
+    "bodyUsed",
+    "bold",
+    "bookmarks",
+    "booleanValue",
+    "boost",
+    "border",
+    "border-block",
+    "border-block-color",
+    "border-block-end",
+    "border-block-end-color",
+    "border-block-end-style",
+    "border-block-end-width",
+    "border-block-start",
+    "border-block-start-color",
+    "border-block-start-style",
+    "border-block-start-width",
+    "border-block-style",
+    "border-block-width",
+    "border-bottom",
+    "border-bottom-color",
+    "border-bottom-left-radius",
+    "border-bottom-right-radius",
+    "border-bottom-style",
+    "border-bottom-width",
+    "border-collapse",
+    "border-color",
+    "border-end-end-radius",
+    "border-end-start-radius",
+    "border-image",
+    "border-image-outset",
+    "border-image-repeat",
+    "border-image-slice",
+    "border-image-source",
+    "border-image-width",
+    "border-inline",
+    "border-inline-color",
+    "border-inline-end",
+    "border-inline-end-color",
+    "border-inline-end-style",
+    "border-inline-end-width",
+    "border-inline-start",
+    "border-inline-start-color",
+    "border-inline-start-style",
+    "border-inline-start-width",
+    "border-inline-style",
+    "border-inline-width",
+    "border-left",
+    "border-left-color",
+    "border-left-style",
+    "border-left-width",
+    "border-radius",
+    "border-right",
+    "border-right-color",
+    "border-right-style",
+    "border-right-width",
+    "border-spacing",
+    "border-start-end-radius",
+    "border-start-start-radius",
+    "border-style",
+    "border-top",
+    "border-top-color",
+    "border-top-left-radius",
+    "border-top-right-radius",
+    "border-top-style",
+    "border-top-width",
+    "border-width",
+    "borderBlock",
+    "borderBlockColor",
+    "borderBlockEnd",
+    "borderBlockEndColor",
+    "borderBlockEndStyle",
+    "borderBlockEndWidth",
+    "borderBlockStart",
+    "borderBlockStartColor",
+    "borderBlockStartStyle",
+    "borderBlockStartWidth",
+    "borderBlockStyle",
+    "borderBlockWidth",
+    "borderBottom",
+    "borderBottomColor",
+    "borderBottomLeftRadius",
+    "borderBottomRightRadius",
+    "borderBottomStyle",
+    "borderBottomWidth",
+    "borderBoxSize",
+    "borderCollapse",
+    "borderColor",
+    "borderColorDark",
+    "borderColorLight",
+    "borderEndEndRadius",
+    "borderEndStartRadius",
+    "borderImage",
+    "borderImageOutset",
+    "borderImageRepeat",
+    "borderImageSlice",
+    "borderImageSource",
+    "borderImageWidth",
+    "borderInline",
+    "borderInlineColor",
+    "borderInlineEnd",
+    "borderInlineEndColor",
+    "borderInlineEndStyle",
+    "borderInlineEndWidth",
+    "borderInlineStart",
+    "borderInlineStartColor",
+    "borderInlineStartStyle",
+    "borderInlineStartWidth",
+    "borderInlineStyle",
+    "borderInlineWidth",
+    "borderLeft",
+    "borderLeftColor",
+    "borderLeftStyle",
+    "borderLeftWidth",
+    "borderRadius",
+    "borderRight",
+    "borderRightColor",
+    "borderRightStyle",
+    "borderRightWidth",
+    "borderSpacing",
+    "borderStartEndRadius",
+    "borderStartStartRadius",
+    "borderStyle",
+    "borderTop",
+    "borderTopColor",
+    "borderTopLeftRadius",
+    "borderTopRightRadius",
+    "borderTopStyle",
+    "borderTopWidth",
+    "borderWidth",
+    "bottom",
+    "bottomMargin",
+    "bound",
+    "boundElements",
+    "boundingClientRect",
+    "boundingHeight",
+    "boundingLeft",
+    "boundingRect",
+    "boundingTop",
+    "boundingWidth",
+    "bounds",
+    "boundsGeometry",
+    "box-decoration-break",
+    "box-shadow",
+    "box-sizing",
+    "boxDecorationBreak",
+    "boxShadow",
+    "boxSizing",
+    "brand",
+    "brands",
+    "break-after",
+    "break-before",
+    "break-inside",
+    "breakAfter",
+    "breakBefore",
+    "breakInside",
+    "broadcast",
+    "browser",
+    "browserLanguage",
+    "browserSettings",
+    "browsingData",
+    "browsingTopics",
+    "btoa",
+    "bubbles",
+    "buffer",
+    "bufferData",
+    "bufferDepth",
+    "bufferSize",
+    "bufferSubData",
+    "buffered",
+    "bufferedAmount",
+    "bufferedAmountLowThreshold",
+    "buffers",
+    "buildID",
+    "buildNumber",
+    "button",
+    "buttonID",
+    "buttons",
+    "byobRequest",
+    "byteLength",
+    "byteOffset",
+    "bytes",
+    "bytesPerRow",
+    "bytesWritten",
+    "c",
+    "cache",
+    "caches",
+    "calendar",
+    "call",
+    "caller",
+    "camera",
+    "canBeFormatted",
+    "canBeMounted",
+    "canBeShared",
+    "canConstructInDedicatedWorker",
+    "canGoBack",
+    "canGoForward",
+    "canHaveChildren",
+    "canHaveHTML",
+    "canInsertDTMF",
+    "canIntercept",
+    "canLoadAdAuctionFencedFrame",
+    "canLoadOpaqueURL",
+    "canMakePayment",
+    "canParse",
+    "canPlayType",
+    "canPresent",
+    "canShare",
+    "canTransition",
+    "canTrickleIceCandidates",
+    "cancel",
+    "cancelAndHoldAtTime",
+    "cancelAnimationFrame",
+    "cancelBubble",
+    "cancelIdleCallback",
+    "cancelScheduledValues",
+    "cancelVideoFrameCallback",
+    "cancelWatchAvailability",
+    "cancelable",
+    "candidate",
+    "canonicalUUID",
+    "canvas",
+    "cap",
+    "capabilities",
+    "caption",
+    "caption-side",
+    "captionSide",
+    "captivePortal",
+    "capture",
+    "captureEvents",
+    "captureStackTrace",
+    "captureStream",
+    "captureTab",
+    "captureVisibleTab",
+    "caret-color",
+    "caretBidiLevel",
+    "caretColor",
+    "caretPositionFromPoint",
+    "caretRangeFromPoint",
+    "cast",
+    "catch",
+    "category",
+    "cause",
+    "cbrt",
+    "cd",
+    "ceil",
+    "cellIndex",
+    "cellPadding",
+    "cellSpacing",
+    "cells",
+    "ch",
+    "chOff",
+    "chain",
+    "challenge",
+    "changeType",
+    "changed",
+    "changedTouches",
+    "channel",
+    "channelCount",
+    "channelCountMode",
+    "channelInterpretation",
+    "chapterInfo",
+    "char",
+    "charAt",
+    "charCode",
+    "charCodeAt",
+    "charIndex",
+    "charLength",
+    "characterBounds",
+    "characterBoundsRangeStart",
+    "characterData",
+    "characterDataOldValue",
+    "characterSet",
+    "characterVariant",
+    "characteristic",
+    "charging",
+    "chargingTime",
+    "charset",
+    "check",
+    "checkDCE",
+    "checkEnclosure",
+    "checkFramebufferStatus",
+    "checkIntersection",
+    "checkValidity",
+    "checkVisibility",
+    "checked",
+    "childElementCount",
+    "childList",
+    "childNodes",
+    "children",
+    "chrome",
+    "ciphertext",
+    "cite",
+    "city",
+    "claimInterface",
+    "claimed",
+    "classList",
+    "className",
+    "classid",
+    "clear",
+    "clearAppBadge",
+    "clearAttributes",
+    "clearBuffer",
+    "clearBufferfi",
+    "clearBufferfv",
+    "clearBufferiv",
+    "clearBufferuiv",
+    "clearColor",
+    "clearData",
+    "clearDepth",
+    "clearHalt",
+    "clearImmediate",
+    "clearInterval",
+    "clearLiveSeekableRange",
+    "clearMarks",
+    "clearMaxGCPauseAccumulator",
+    "clearMeasures",
+    "clearOriginJoinedAdInterestGroups",
+    "clearParameters",
+    "clearRect",
+    "clearResourceTimings",
+    "clearShadow",
+    "clearStencil",
+    "clearTimeout",
+    "clearValue",
+    "clearWatch",
+    "click",
+    "clickCount",
+    "clientDataJSON",
+    "clientHeight",
+    "clientInformation",
+    "clientLeft",
+    "clientRect",
+    "clientRects",
+    "clientTop",
+    "clientWaitSync",
+    "clientWidth",
+    "clientX",
+    "clientY",
+    "clip",
+    "clip-path",
+    "clip-rule",
+    "clipBottom",
+    "clipLeft",
+    "clipPath",
+    "clipPathUnits",
+    "clipRight",
+    "clipRule",
+    "clipTop",
+    "clipboard",
+    "clipboardData",
+    "clonable",
+    "clone",
+    "cloneContents",
+    "cloneNode",
+    "cloneRange",
+    "close",
+    "closeCode",
+    "closePath",
+    "closed",
+    "closedBy",
+    "closest",
+    "clz",
+    "clz32",
+    "cm",
+    "cmp",
+    "code",
+    "codeBase",
+    "codePointAt",
+    "codeType",
+    "codedHeight",
+    "codedRect",
+    "codedWidth",
+    "colSpan",
+    "collapse",
+    "collapseToEnd",
+    "collapseToStart",
+    "collapsed",
+    "collect",
+    "collections",
+    "colno",
+    "color",
+    "color-adjust",
+    "color-interpolation",
+    "color-interpolation-filters",
+    "color-scheme",
+    "colorAdjust",
+    "colorAttachments",
+    "colorDepth",
+    "colorFormats",
+    "colorInterpolation",
+    "colorInterpolationFilters",
+    "colorMask",
+    "colorScheme",
+    "colorSpace",
+    "colorType",
+    "cols",
+    "column-count",
+    "column-fill",
+    "column-gap",
+    "column-rule",
+    "column-rule-color",
+    "column-rule-style",
+    "column-rule-width",
+    "column-span",
+    "column-width",
+    "columnCount",
+    "columnFill",
+    "columnGap",
+    "columnNumber",
+    "columnRule",
+    "columnRuleColor",
+    "columnRuleStyle",
+    "columnRuleWidth",
+    "columnSpan",
+    "columnWidth",
+    "columns",
+    "command",
+    "commandForElement",
+    "commands",
+    "commit",
+    "commitLoadTime",
+    "commitPreferences",
+    "commitStyles",
+    "committed",
+    "commonAncestorContainer",
+    "compact",
+    "compare",
+    "compareBoundaryPoints",
+    "compareDocumentPosition",
+    "compareEndPoints",
+    "compareExchange",
+    "compareNode",
+    "comparePoint",
+    "compatMode",
+    "compatible",
+    "compile",
+    "compileShader",
+    "compileStreaming",
+    "complete",
+    "completed",
+    "component",
+    "componentFromPoint",
+    "composed",
+    "composedPath",
+    "composite",
+    "compositionEndOffset",
+    "compositionStartOffset",
+    "compressedTexImage2D",
+    "compressedTexImage3D",
+    "compressedTexSubImage2D",
+    "compressedTexSubImage3D",
+    "compute",
+    "computedStyleMap",
+    "concat",
+    "conditionText",
+    "coneInnerAngle",
+    "coneOuterAngle",
+    "coneOuterGain",
+    "config",
+    "configURL",
+    "configurable",
+    "configuration",
+    "configurationName",
+    "configurationValue",
+    "configurations",
+    "configure",
+    "confirm",
+    "confirmComposition",
+    "confirmSiteSpecificTrackingException",
+    "confirmWebWideTrackingException",
+    "congestionControl",
+    "connect",
+    "connectEnd",
+    "connectNative",
+    "connectShark",
+    "connectStart",
+    "connected",
+    "connectedCallback",
+    "connectedMoveCallback",
+    "connection",
+    "connectionInfo",
+    "connectionList",
+    "connectionSpeed",
+    "connectionState",
+    "connections",
+    "console",
+    "consolidate",
+    "constants",
+    "constraint",
+    "constrictionActive",
+    "construct",
+    "constructor",
+    "contactID",
+    "contain",
+    "contain-intrinsic-block-size",
+    "contain-intrinsic-height",
+    "contain-intrinsic-inline-size",
+    "contain-intrinsic-size",
+    "contain-intrinsic-width",
+    "containIntrinsicBlockSize",
+    "containIntrinsicHeight",
+    "containIntrinsicInlineSize",
+    "containIntrinsicSize",
+    "containIntrinsicWidth",
+    "container",
+    "container-name",
+    "container-type",
+    "containerId",
+    "containerName",
+    "containerQuery",
+    "containerSrc",
+    "containerType",
+    "contains",
+    "containsNode",
+    "content",
+    "content-visibility",
+    "contentBoxSize",
+    "contentDocument",
+    "contentEditable",
+    "contentEncoding",
+    "contentHint",
+    "contentOverflow",
+    "contentRect",
+    "contentScriptType",
+    "contentStyleType",
+    "contentType",
+    "contentVisibility",
+    "contentWindow",
+    "context",
+    "contextId",
+    "contextIds",
+    "contextMenu",
+    "contextMenus",
+    "contextType",
+    "contextTypes",
+    "contextmenu",
+    "contextualIdentities",
+    "continue",
+    "continuePrimaryKey",
+    "continuous",
+    "control",
+    "controlTransferIn",
+    "controlTransferOut",
+    "controller",
+    "controls",
+    "controlsList",
+    "convertPointFromNode",
+    "convertQuadFromNode",
+    "convertRectFromNode",
+    "convertToBlob",
+    "convertToSpecifiedUnits",
+    "cookie",
+    "cookieEnabled",
+    "cookieStore",
+    "cookies",
+    "coords",
+    "copyBufferSubData",
+    "copyBufferToBuffer",
+    "copyBufferToTexture",
+    "copyExternalImageToTexture",
+    "copyFromChannel",
+    "copyTexImage2D",
+    "copyTexSubImage2D",
+    "copyTexSubImage3D",
+    "copyTextureToBuffer",
+    "copyTextureToTexture",
+    "copyTo",
+    "copyToChannel",
+    "copyWithin",
+    "correspondingElement",
+    "correspondingUseElement",
+    "corruptedVideoFrames",
+    "cos",
+    "cosh",
+    "count",
+    "countReset",
+    "counter-increment",
+    "counter-reset",
+    "counter-set",
+    "counterIncrement",
+    "counterReset",
+    "counterSet",
+    "country",
+    "cpuClass",
+    "cpuSleepAllowed",
+    "cqb",
+    "cqh",
+    "cqi",
+    "cqmax",
+    "cqmin",
+    "cqw",
+    "create",
+    "createAnalyser",
+    "createAnchor",
+    "createAnswer",
+    "createAttribute",
+    "createAttributeNS",
+    "createAuctionNonce",
+    "createBidirectionalStream",
+    "createBindGroup",
+    "createBindGroupLayout",
+    "createBiquadFilter",
+    "createBuffer",
+    "createBufferSource",
+    "createCDATASection",
+    "createCSSStyleSheet",
+    "createCaption",
+    "createChannelMerger",
+    "createChannelSplitter",
+    "createCommandEncoder",
+    "createComment",
+    "createComputePipeline",
+    "createComputePipelineAsync",
+    "createConicGradient",
+    "createConstantSource",
+    "createContextualFragment",
+    "createControlRange",
+    "createConvolver",
+    "createDTMFSender",
+    "createDataChannel",
+    "createDelay",
+    "createDelayNode",
+    "createDocument",
+    "createDocumentFragment",
+    "createDocumentType",
+    "createDynamicsCompressor",
+    "createElement",
+    "createElementNS",
+    "createEncodedStreams",
+    "createEntityReference",
+    "createEvent",
+    "createEventObject",
+    "createExpression",
+    "createFramebuffer",
+    "createFunction",
+    "createGain",
+    "createGainNode",
+    "createHTML",
+    "createHTMLDocument",
+    "createIIRFilter",
+    "createImageBitmap",
+    "createImageData",
+    "createIndex",
+    "createJavaScriptNode",
+    "createLinearGradient",
+    "createMediaElementSource",
+    "createMediaKeys",
+    "createMediaStreamDestination",
+    "createMediaStreamSource",
+    "createMediaStreamTrackSource",
+    "createMutableFile",
+    "createNSResolver",
+    "createNodeIterator",
+    "createNotification",
+    "createObjectStore",
+    "createObjectURL",
+    "createOffer",
+    "createOscillator",
+    "createPanner",
+    "createPattern",
+    "createPeriodicWave",
+    "createPipelineLayout",
+    "createPolicy",
+    "createPopup",
+    "createProcessingInstruction",
+    "createProgram",
+    "createQuery",
+    "createQuerySet",
+    "createRadialGradient",
+    "createRange",
+    "createRangeCollection",
+    "createReader",
+    "createRenderBundleEncoder",
+    "createRenderPipeline",
+    "createRenderPipelineAsync",
+    "createRenderbuffer",
+    "createSVGAngle",
+    "createSVGLength",
+    "createSVGMatrix",
+    "createSVGNumber",
+    "createSVGPathSegArcAbs",
+    "createSVGPathSegArcRel",
+    "createSVGPathSegClosePath",
+    "createSVGPathSegCurvetoCubicAbs",
+    "createSVGPathSegCurvetoCubicRel",
+    "createSVGPathSegCurvetoCubicSmoothAbs",
+    "createSVGPathSegCurvetoCubicSmoothRel",
+    "createSVGPathSegCurvetoQuadraticAbs",
+    "createSVGPathSegCurvetoQuadraticRel",
+    "createSVGPathSegCurvetoQuadraticSmoothAbs",
+    "createSVGPathSegCurvetoQuadraticSmoothRel",
+    "createSVGPathSegLinetoAbs",
+    "createSVGPathSegLinetoHorizontalAbs",
+    "createSVGPathSegLinetoHorizontalRel",
+    "createSVGPathSegLinetoRel",
+    "createSVGPathSegLinetoVerticalAbs",
+    "createSVGPathSegLinetoVerticalRel",
+    "createSVGPathSegMovetoAbs",
+    "createSVGPathSegMovetoRel",
+    "createSVGPoint",
+    "createSVGRect",
+    "createSVGTransform",
+    "createSVGTransformFromMatrix",
+    "createSampler",
+    "createScript",
+    "createScriptProcessor",
+    "createScriptURL",
+    "createSession",
+    "createShader",
+    "createShaderModule",
+    "createShadowRoot",
+    "createStereoPanner",
+    "createStyleSheet",
+    "createTBody",
+    "createTFoot",
+    "createTHead",
+    "createTask",
+    "createTextNode",
+    "createTextRange",
+    "createTexture",
+    "createTouch",
+    "createTouchList",
+    "createTransformFeedback",
+    "createTreeWalker",
+    "createUnidirectionalStream",
+    "createVertexArray",
+    "createView",
+    "createWaveShaper",
+    "createWorklet",
+    "createWritable",
+    "creationTime",
+    "credentialless",
+    "credentials",
+    "criticalCHRestart",
+    "cropTo",
+    "crossOrigin",
+    "crossOriginIsolated",
+    "crypto",
+    "csi",
+    "csp",
+    "cssFloat",
+    "cssRules",
+    "cssText",
+    "cssValueType",
+    "ctrlKey",
+    "ctrlLeft",
+    "cues",
+    "cullFace",
+    "cullMode",
+    "currentCSSZoom",
+    "currentDirection",
+    "currentEntry",
+    "currentLocalDescription",
+    "currentNode",
+    "currentPage",
+    "currentRect",
+    "currentRemoteDescription",
+    "currentScale",
+    "currentScreen",
+    "currentScript",
+    "currentSrc",
+    "currentState",
+    "currentStyle",
+    "currentTarget",
+    "currentTime",
+    "currentTranslate",
+    "currentView",
+    "cursor",
+    "curve",
+    "customElements",
+    "customError",
+    "cx",
+    "cy",
+    "d",
+    "data",
+    "dataFld",
+    "dataFormatAs",
+    "dataLoss",
+    "dataLossMessage",
+    "dataPageSize",
+    "dataSrc",
+    "dataTransfer",
+    "database",
+    "databases",
+    "datagrams",
+    "dataset",
+    "dateStyle",
+    "dateTime",
+    "day",
+    "dayPeriod",
+    "days",
+    "db",
+    "debug",
+    "debuggerEnabled",
+    "declarativeNetRequest",
+    "declare",
+    "decode",
+    "decodeAudioData",
+    "decodeQueueSize",
+    "decodeURI",
+    "decodeURIComponent",
+    "decodedBodySize",
+    "decoding",
+    "decodingInfo",
+    "decreaseZoomLevel",
+    "decrypt",
+    "default",
+    "defaultCharset",
+    "defaultChecked",
+    "defaultMuted",
+    "defaultPlaybackRate",
+    "defaultPolicy",
+    "defaultPrevented",
+    "defaultQueue",
+    "defaultRequest",
+    "defaultSelected",
+    "defaultStatus",
+    "defaultURL",
+    "defaultValue",
+    "defaultView",
+    "defaultstatus",
+    "defer",
+    "define",
+    "defineMagicFunction",
+    "defineMagicVariable",
+    "defineProperties",
+    "defineProperty",
+    "deg",
+    "delay",
+    "delayTime",
+    "delegatesFocus",
+    "delete",
+    "deleteBuffer",
+    "deleteCaption",
+    "deleteCell",
+    "deleteContents",
+    "deleteData",
+    "deleteDatabase",
+    "deleteFramebuffer",
+    "deleteFromDocument",
+    "deleteIndex",
+    "deleteMedium",
+    "deleteObjectStore",
+    "deleteProgram",
+    "deleteProperty",
+    "deleteQuery",
+    "deleteRenderbuffer",
+    "deleteRow",
+    "deleteRule",
+    "deleteSampler",
+    "deleteShader",
+    "deleteSync",
+    "deleteTFoot",
+    "deleteTHead",
+    "deleteTexture",
+    "deleteTransformFeedback",
+    "deleteVertexArray",
+    "deleted",
+    "deliverChangeRecords",
+    "deliveredFrames",
+    "deliveredFramesDuration",
+    "delivery",
+    "deliveryInfo",
+    "deliveryStatus",
+    "deliveryTimestamp",
+    "deliveryType",
+    "delta",
+    "deltaMode",
+    "deltaX",
+    "deltaY",
+    "deltaZ",
+    "dependentLocality",
+    "deprecatedReplaceInURN",
+    "deprecatedRunAdAuctionEnforcesKAnonymity",
+    "deprecatedURNToURL",
+    "depthActive",
+    "depthBias",
+    "depthBiasClamp",
+    "depthBiasSlopeScale",
+    "depthClearValue",
+    "depthCompare",
+    "depthDataFormat",
+    "depthFailOp",
+    "depthFar",
+    "depthFunc",
+    "depthLoadOp",
+    "depthMask",
+    "depthNear",
+    "depthOrArrayLayers",
+    "depthRange",
+    "depthReadOnly",
+    "depthStencil",
+    "depthStencilAttachment",
+    "depthStencilFormat",
+    "depthStoreOp",
+    "depthType",
+    "depthUsage",
+    "depthWriteEnabled",
+    "deref",
+    "deriveBits",
+    "deriveKey",
+    "descentOverride",
+    "description",
+    "deselectAll",
+    "designMode",
+    "desiredSize",
+    "destination",
+    "destinationURL",
+    "destroy",
+    "detach",
+    "detachEvent",
+    "detachShader",
+    "detached",
+    "detail",
+    "details",
+    "detect",
+    "detectLanguage",
+    "detune",
+    "device",
+    "deviceClass",
+    "deviceId",
+    "deviceMemory",
+    "devicePixelContentBoxSize",
+    "devicePixelRatio",
+    "devicePosture",
+    "deviceProtocol",
+    "deviceSubclass",
+    "deviceVersionMajor",
+    "deviceVersionMinor",
+    "deviceVersionSubminor",
+    "deviceXDPI",
+    "deviceYDPI",
+    "devtools",
+    "devtools_panels",
+    "didTimeout",
+    "difference",
+    "diffuseConstant",
+    "digest",
+    "dimension",
+    "dimensions",
+    "dir",
+    "dirName",
+    "direction",
+    "dirxml",
+    "disable",
+    "disablePictureInPicture",
+    "disableRemotePlayback",
+    "disableVertexAttribArray",
+    "disabled",
+    "discard",
+    "discardedFrames",
+    "dischargingTime",
+    "disconnect",
+    "disconnectShark",
+    "disconnectedCallback",
+    "dispatchEvent",
+    "dispatchWorkgroups",
+    "dispatchWorkgroupsIndirect",
+    "display",
+    "displayHeight",
+    "displayId",
+    "displayName",
+    "displayWidth",
+    "dispose",
+    "disposeAsync",
+    "disposed",
+    "disposition",
+    "distanceModel",
+    "div",
+    "divisor",
+    "djsapi",
+    "djsproxy",
+    "dns",
+    "doImport",
+    "doNotTrack",
+    "doScroll",
+    "doctype",
+    "document",
+    "documentElement",
+    "documentId",
+    "documentIds",
+    "documentLifecycle",
+    "documentMode",
+    "documentOrigin",
+    "documentOrigins",
+    "documentPictureInPicture",
+    "documentURI",
+    "documentURL",
+    "documentUrl",
+    "documentUrls",
+    "dolphin",
+    "dolphinGameCenter",
+    "dolphininfo",
+    "dolphinmeta",
+    "dom",
+    "domComplete",
+    "domContentLoadedEventEnd",
+    "domContentLoadedEventStart",
+    "domInteractive",
+    "domLoading",
+    "domOverlayState",
+    "domain",
+    "domainLookupEnd",
+    "domainLookupStart",
+    "dominant-baseline",
+    "dominantBaseline",
+    "done",
+    "dopplerFactor",
+    "dotAll",
+    "downDegrees",
+    "downlink",
+    "download",
+    "downloadRequest",
+    "downloadTotal",
+    "downloaded",
+    "downloads",
+    "dpcm",
+    "dpi",
+    "dppx",
+    "dragDrop",
+    "draggable",
+    "draw",
+    "drawArrays",
+    "drawArraysInstanced",
+    "drawArraysInstancedANGLE",
+    "drawBuffers",
+    "drawCustomFocusRing",
+    "drawElements",
+    "drawElementsInstanced",
+    "drawElementsInstancedANGLE",
+    "drawFocusIfNeeded",
+    "drawImage",
+    "drawImageFromRect",
+    "drawIndexed",
+    "drawIndexedIndirect",
+    "drawIndirect",
+    "drawRangeElements",
+    "drawSystemFocusRing",
+    "drawingBufferColorSpace",
+    "drawingBufferFormat",
+    "drawingBufferHeight",
+    "drawingBufferStorage",
+    "drawingBufferWidth",
+    "drop",
+    "dropEffect",
+    "droppedVideoFrames",
+    "dropzone",
+    "dstFactor",
+    "dtmf",
+    "dump",
+    "dumpProfile",
+    "duplex",
+    "duplicate",
+    "durability",
+    "duration",
+    "dvb",
+    "dvh",
+    "dvi",
+    "dvmax",
+    "dvmin",
+    "dvname",
+    "dvnum",
+    "dvw",
+    "dx",
+    "dy",
+    "dynamicId",
+    "dynsrc",
+    "e",
+    "edgeMode",
+    "editContext",
+    "effect",
+    "effectAllowed",
+    "effectiveDirective",
+    "effectiveType",
+    "effects",
+    "elapsedTime",
+    "element",
+    "elementFromPoint",
+    "elementTiming",
+    "elements",
+    "elementsFromPoint",
+    "elevation",
+    "ellipse",
+    "em",
+    "emHeightAscent",
+    "emHeightDescent",
+    "email",
+    "embeds",
+    "emit",
+    "emma",
+    "empty",
+    "empty-cells",
+    "emptyCells",
+    "emptyHTML",
+    "emptyScript",
+    "emulatedPosition",
+    "enable",
+    "enableBackground",
+    "enableDelegations",
+    "enableStyleSheetsForSet",
+    "enableVertexAttribArray",
+    "enabled",
+    "enabledFeatures",
+    "enabledPlugin",
+    "encode",
+    "encodeInto",
+    "encodeQueueSize",
+    "encodeURI",
+    "encodeURIComponent",
+    "encodedBodySize",
+    "encoding",
+    "encodingInfo",
+    "encrypt",
+    "enctype",
+    "end",
+    "endContainer",
+    "endElement",
+    "endElementAt",
+    "endOcclusionQuery",
+    "endOfPassWriteIndex",
+    "endOfStream",
+    "endOffset",
+    "endQuery",
+    "endTime",
+    "endTransformFeedback",
+    "ended",
+    "endpoint",
+    "endpointNumber",
+    "endpoints",
+    "endsWith",
+    "enqueue",
+    "enterKeyHint",
+    "entities",
+    "entries",
+    "entry",
+    "entryPoint",
+    "entryType",
+    "enumerable",
+    "enumerate",
+    "enumerateDevices",
+    "enumerateEditable",
+    "environmentBlendMode",
+    "equals",
+    "era",
+    "error",
+    "errorCode",
+    "errorDetail",
+    "errorText",
+    "escape",
+    "estimate",
+    "eval",
+    "evaluate",
+    "event",
+    "eventCounts",
+    "eventPhase",
+    "events",
+    "every",
+    "ex",
+    "exception",
+    "exchange",
+    "exec",
+    "execCommand",
+    "execCommandShowHelp",
+    "execScript",
+    "executeBundles",
+    "executionStart",
+    "exitFullscreen",
+    "exitPictureInPicture",
+    "exitPointerLock",
+    "exitPresent",
+    "exp",
+    "expand",
+    "expandEntityReferences",
+    "expando",
+    "expansion",
+    "expectedContextLanguages",
+    "expectedImprovement",
+    "expectedInputLanguages",
+    "experiments",
+    "expiration",
+    "expirationTime",
+    "expires",
+    "expiryDate",
+    "explicitOriginalTarget",
+    "expm1",
+    "exponent",
+    "exponentialRampToValueAtTime",
+    "exportKey",
+    "exports",
+    "extend",
+    "extension",
+    "extensionTypes",
+    "extensions",
+    "extentNode",
+    "extentOffset",
+    "external",
+    "externalResourcesRequired",
+    "externalTexture",
+    "extractContents",
+    "extractable",
+    "eye",
+    "f",
+    "f16round",
+    "face",
+    "factoryReset",
+    "failOp",
+    "failureReason",
+    "fallback",
+    "family",
+    "familyName",
+    "farthestViewportElement",
+    "fastSeek",
+    "fatal",
+    "featureId",
+    "featurePolicy",
+    "featureSettings",
+    "features",
+    "fence",
+    "fenceSync",
+    "fetch",
+    "fetchLater",
+    "fetchPriority",
+    "fetchStart",
+    "fftSize",
+    "fgColor",
+    "fieldOfView",
+    "file",
+    "fileCreatedDate",
+    "fileHandle",
+    "fileModifiedDate",
+    "fileName",
+    "fileSize",
+    "fileUpdatedDate",
+    "filename",
+    "files",
+    "filesystem",
+    "fill",
+    "fill-opacity",
+    "fill-rule",
+    "fillJointRadii",
+    "fillLightMode",
+    "fillOpacity",
+    "fillPoses",
+    "fillRect",
+    "fillRule",
+    "fillStyle",
+    "fillText",
+    "filter",
+    "filterResX",
+    "filterResY",
+    "filterUnits",
+    "filters",
+    "finalResponseHeadersStart",
+    "finally",
+    "find",
+    "findIndex",
+    "findLast",
+    "findLastIndex",
+    "findRule",
+    "findText",
+    "finish",
+    "finishDocumentLoadTime",
+    "finishLoadTime",
+    "finished",
+    "fireEvent",
+    "firesTouchEvents",
+    "first",
+    "firstChild",
+    "firstElementChild",
+    "firstInterimResponseStart",
+    "firstPage",
+    "firstPaintAfterLoadTime",
+    "firstPaintTime",
+    "firstUIEventTimestamp",
+    "fixed",
+    "flags",
+    "flat",
+    "flatMap",
+    "flex",
+    "flex-basis",
+    "flex-direction",
+    "flex-flow",
+    "flex-grow",
+    "flex-shrink",
+    "flex-wrap",
+    "flexBasis",
+    "flexDirection",
+    "flexFlow",
+    "flexGrow",
+    "flexShrink",
+    "flexWrap",
+    "flip",
+    "flipX",
+    "flipY",
+    "float",
+    "float32",
+    "float64",
+    "flood-color",
+    "flood-opacity",
+    "floodColor",
+    "floodOpacity",
+    "floor",
+    "flush",
+    "focus",
+    "focusNode",
+    "focusOffset",
+    "font",
+    "font-family",
+    "font-feature-settings",
+    "font-kerning",
+    "font-language-override",
+    "font-optical-sizing",
+    "font-palette",
+    "font-size",
+    "font-size-adjust",
+    "font-stretch",
+    "font-style",
+    "font-synthesis",
+    "font-synthesis-position",
+    "font-synthesis-small-caps",
+    "font-synthesis-style",
+    "font-synthesis-weight",
+    "font-variant",
+    "font-variant-alternates",
+    "font-variant-caps",
+    "font-variant-east-asian",
+    "font-variant-ligatures",
+    "font-variant-numeric",
+    "font-variant-position",
+    "font-variation-settings",
+    "font-weight",
+    "fontBoundingBoxAscent",
+    "fontBoundingBoxDescent",
+    "fontFamily",
+    "fontFeatureSettings",
+    "fontKerning",
+    "fontLanguageOverride",
+    "fontOpticalSizing",
+    "fontPalette",
+    "fontSize",
+    "fontSizeAdjust",
+    "fontSmoothingEnabled",
+    "fontStretch",
+    "fontStyle",
+    "fontSynthesis",
+    "fontSynthesisPosition",
+    "fontSynthesisSmallCaps",
+    "fontSynthesisStyle",
+    "fontSynthesisWeight",
+    "fontVariant",
+    "fontVariantAlternates",
+    "fontVariantCaps",
+    "fontVariantEastAsian",
+    "fontVariantEmoji",
+    "fontVariantLigatures",
+    "fontVariantNumeric",
+    "fontVariantPosition",
+    "fontVariationSettings",
+    "fontWeight",
+    "fontcolor",
+    "fontfaces",
+    "fonts",
+    "fontsize",
+    "for",
+    "forEach",
+    "force",
+    "forceFallbackAdapter",
+    "forceRedraw",
+    "forced-color-adjust",
+    "forcedColorAdjust",
+    "forcedStyleAndLayoutDuration",
+    "forget",
+    "form",
+    "formAction",
+    "formData",
+    "formEnctype",
+    "formMethod",
+    "formNoValidate",
+    "formTarget",
+    "format",
+    "formatToParts",
+    "forms",
+    "forward",
+    "forwardWheel",
+    "forwardX",
+    "forwardY",
+    "forwardZ",
+    "foundation",
+    "fr",
+    "fractionalSecondDigits",
+    "fragment",
+    "fragmentDirective",
+    "frame",
+    "frameBorder",
+    "frameCount",
+    "frameElement",
+    "frameId",
+    "frameIds",
+    "frameSpacing",
+    "framebuffer",
+    "framebufferHeight",
+    "framebufferRenderbuffer",
+    "framebufferTexture2D",
+    "framebufferTextureLayer",
+    "framebufferWidth",
+    "frames",
+    "freeSpace",
+    "freeze",
+    "frequency",
+    "frequencyBinCount",
+    "from",
+    "fromAsync",
+    "fromBase64",
+    "fromCharCode",
+    "fromCodePoint",
+    "fromElement",
+    "fromEntries",
+    "fromFloat32Array",
+    "fromFloat64Array",
+    "fromHex",
+    "fromMatrix",
+    "fromPoint",
+    "fromQuad",
+    "fromRect",
+    "frontFace",
+    "fround",
+    "fullName",
+    "fullPath",
+    "fullRange",
+    "fullScreen",
+    "fullVersionList",
+    "fullscreen",
+    "fullscreenElement",
+    "fullscreenEnabled",
+    "fx",
+    "fy",
+    "g",
+    "gain",
+    "gamepad",
+    "gamma",
+    "gap",
+    "gatheringState",
+    "gatt",
+    "geckoProfiler",
+    "genderIdentity",
+    "generateCertificate",
+    "generateKey",
+    "generateMipmap",
+    "generateRequest",
+    "geolocation",
+    "gestureObject",
+    "get",
+    "getAcceptLanguages",
+    "getActiveAttrib",
+    "getActiveUniform",
+    "getActiveUniformBlockName",
+    "getActiveUniformBlockParameter",
+    "getActiveUniforms",
+    "getAdjacentText",
+    "getAll",
+    "getAllKeys",
+    "getAllRecords",
+    "getAllResponseHeaders",
+    "getAllowlistForFeature",
+    "getAnimations",
+    "getAsFile",
+    "getAsFileSystemHandle",
+    "getAsString",
+    "getAttachedShaders",
+    "getAttribLocation",
+    "getAttribute",
+    "getAttributeNS",
+    "getAttributeNames",
+    "getAttributeNode",
+    "getAttributeNodeNS",
+    "getAttributeType",
+    "getAudioTracks",
+    "getAuthenticatorData",
+    "getAutoplayPolicy",
+    "getAvailability",
+    "getBBox",
+    "getBackgroundPage",
+    "getBadgeBackgroundColor",
+    "getBadgeText",
+    "getBadgeTextColor",
+    "getBattery",
+    "getBigInt64",
+    "getBigUint64",
+    "getBindGroupLayout",
+    "getBlob",
+    "getBookmark",
+    "getBoundingClientRect",
+    "getBounds",
+    "getBoxQuads",
+    "getBrowserInfo",
+    "getBufferParameter",
+    "getBufferSubData",
+    "getByteFrequencyData",
+    "getByteTimeDomainData",
+    "getCSSCanvasContext",
+    "getCTM",
+    "getCameraImage",
+    "getCandidateWindowClientRect",
+    "getCanonicalLocales",
+    "getCapabilities",
+    "getCaptureHandle",
+    "getChannelData",
+    "getCharNumAtPosition",
+    "getCharacteristic",
+    "getCharacteristics",
+    "getClientCapabilities",
+    "getClientExtensionResults",
+    "getClientRect",
+    "getClientRects",
+    "getCoalescedEvents",
+    "getCompilationInfo",
+    "getComposedRanges",
+    "getCompositionAlternatives",
+    "getComputedStyle",
+    "getComputedTextLength",
+    "getComputedTiming",
+    "getConfiguration",
+    "getConstraints",
+    "getContext",
+    "getContextAttributes",
+    "getContexts",
+    "getContributingSources",
+    "getCounterValue",
+    "getCueAsHTML",
+    "getCueById",
+    "getCurrent",
+    "getCurrentPosition",
+    "getCurrentTexture",
+    "getCurrentTime",
+    "getData",
+    "getDatabaseNames",
+    "getDate",
+    "getDay",
+    "getDefaultComputedStyle",
+    "getDepthInMeters",
+    "getDepthInformation",
+    "getDescriptor",
+    "getDescriptors",
+    "getDestinationInsertionPoints",
+    "getDevices",
+    "getDirectory",
+    "getDirectoryHandle",
+    "getDisplayMedia",
+    "getDistributedNodes",
+    "getEditable",
+    "getElementById",
+    "getElementsByClassName",
+    "getElementsByName",
+    "getElementsByTagName",
+    "getElementsByTagNameNS",
+    "getEnclosureList",
+    "getEndPositionOfChar",
+    "getEntries",
+    "getEntriesByName",
+    "getEntriesByType",
+    "getError",
+    "getExtension",
+    "getExtentOfChar",
+    "getEyeParameters",
+    "getFeature",
+    "getFiberRoots",
+    "getFile",
+    "getFileHandle",
+    "getFiles",
+    "getFilesAndDirectories",
+    "getFingerprints",
+    "getFloat16",
+    "getFloat32",
+    "getFloat64",
+    "getFloatFrequencyData",
+    "getFloatTimeDomainData",
+    "getFloatValue",
+    "getFragDataLocation",
+    "getFrameData",
+    "getFrameId",
+    "getFramebufferAttachmentParameter",
+    "getFrequencyResponse",
+    "getFullYear",
+    "getGamepads",
+    "getHTML",
+    "getHeaderExtensionsToNegotiate",
+    "getHighEntropyValues",
+    "getHitTestResults",
+    "getHitTestResultsForTransientInput",
+    "getHours",
+    "getIdentityAssertion",
+    "getIds",
+    "getImageData",
+    "getIndexedParameter",
+    "getInfo",
+    "getInnerHTML",
+    "getInstalledRelatedApps",
+    "getInt16",
+    "getInt32",
+    "getInt8",
+    "getInterestGroupAdAuctionData",
+    "getInternalModuleRanges",
+    "getInternalformatParameter",
+    "getIntersectionList",
+    "getItem",
+    "getItems",
+    "getJointPose",
+    "getKey",
+    "getKeyframes",
+    "getLastFocused",
+    "getLayers",
+    "getLayoutMap",
+    "getLightEstimate",
+    "getLineDash",
+    "getLocalCandidates",
+    "getLocalParameters",
+    "getLocalStreams",
+    "getManagedConfiguration",
+    "getManifest",
+    "getMappedRange",
+    "getMarks",
+    "getMatchedCSSRules",
+    "getMaxGCPauseSinceClear",
+    "getMeasures",
+    "getMessage",
+    "getMetadata",
+    "getMilliseconds",
+    "getMinutes",
+    "getModifierState",
+    "getMonth",
+    "getName",
+    "getNamedItem",
+    "getNamedItemNS",
+    "getNativeFramebufferScaleFactor",
+    "getNegotiatedHeaderExtensions",
+    "getNestedConfigs",
+    "getNotifications",
+    "getNotifier",
+    "getNumberOfChars",
+    "getOffsetReferenceSpace",
+    "getOrInsert",
+    "getOrInsertComputed",
+    "getOutputTimestamp",
+    "getOverrideHistoryNavigationMode",
+    "getOverrideStyle",
+    "getOwnPropertyDescriptor",
+    "getOwnPropertyDescriptors",
+    "getOwnPropertyNames",
+    "getOwnPropertySymbols",
+    "getPackageDirectoryEntry",
+    "getParameter",
+    "getParameters",
+    "getParent",
+    "getPathData",
+    "getPathSegAtLength",
+    "getPathSegmentAtLength",
+    "getPermissionWarningsByManifest",
+    "getPhotoCapabilities",
+    "getPhotoSettings",
+    "getPlatformInfo",
+    "getPointAtLength",
+    "getPopup",
+    "getPorts",
+    "getPose",
+    "getPredictedEvents",
+    "getPreference",
+    "getPreferenceDefault",
+    "getPreferredCanvasFormat",
+    "getPresentationAttribute",
+    "getPreventDefault",
+    "getPrimaryService",
+    "getPrimaryServices",
+    "getProgramInfoLog",
+    "getProgramParameter",
+    "getPropertyCSSValue",
+    "getPropertyPriority",
+    "getPropertyShorthand",
+    "getPropertyType",
+    "getPropertyValue",
+    "getPrototypeOf",
+    "getPublicKey",
+    "getPublicKeyAlgorithm",
+    "getQuery",
+    "getQueryParameter",
+    "getRGBColorValue",
+    "getRandomValues",
+    "getRangeAt",
+    "getReader",
+    "getReceivers",
+    "getRectValue",
+    "getReflectionCubeMap",
+    "getRegistration",
+    "getRegistrations",
+    "getRemoteCandidates",
+    "getRemoteCertificates",
+    "getRemoteParameters",
+    "getRemoteStreams",
+    "getRenderbufferParameter",
+    "getResponseHeader",
+    "getRoot",
+    "getRootNode",
+    "getRotationOfChar",
+    "getSVGDocument",
+    "getSamplerParameter",
+    "getScreenCTM",
+    "getScreenDetails",
+    "getSeconds",
+    "getSelectedCandidatePair",
+    "getSelection",
+    "getSelf",
+    "getSenders",
+    "getService",
+    "getSetCookie",
+    "getSettings",
+    "getShaderInfoLog",
+    "getShaderParameter",
+    "getShaderPrecisionFormat",
+    "getShaderSource",
+    "getSignals",
+    "getSimpleDuration",
+    "getSiteIcons",
+    "getSources",
+    "getSpeculativeParserUrls",
+    "getStartPositionOfChar",
+    "getStartTime",
+    "getState",
+    "getStats",
+    "getStatusForPolicy",
+    "getStorageUpdates",
+    "getStreamById",
+    "getStringValue",
+    "getSubStringLength",
+    "getSubscription",
+    "getSubscriptions",
+    "getSupportedConstraints",
+    "getSupportedExtensions",
+    "getSupportedFormats",
+    "getSupportedZoomLevels",
+    "getSyncParameter",
+    "getSynchronizationSources",
+    "getTags",
+    "getTargetRanges",
+    "getTexParameter",
+    "getTextFormats",
+    "getTime",
+    "getTimezoneOffset",
+    "getTiming",
+    "getTitle",
+    "getTitlebarAreaRect",
+    "getTotalLength",
+    "getTrackById",
+    "getTracks",
+    "getTransceivers",
+    "getTransform",
+    "getTransformFeedbackVarying",
+    "getTransformToElement",
+    "getTransports",
+    "getType",
+    "getTypeMapping",
+    "getUILanguage",
+    "getURL",
+    "getUTCDate",
+    "getUTCDay",
+    "getUTCFullYear",
+    "getUTCHours",
+    "getUTCMilliseconds",
+    "getUTCMinutes",
+    "getUTCMonth",
+    "getUTCSeconds",
+    "getUint16",
+    "getUint32",
+    "getUint8",
+    "getUniform",
+    "getUniformBlockIndex",
+    "getUniformIndices",
+    "getUniformLocation",
+    "getUserInfo",
+    "getUserMedia",
+    "getUserSettings",
+    "getVRDisplays",
+    "getValues",
+    "getVarDate",
+    "getVariableValue",
+    "getVertexAttrib",
+    "getVertexAttribOffset",
+    "getVideoPlaybackQuality",
+    "getVideoTracks",
+    "getViewerPose",
+    "getViewport",
+    "getViews",
+    "getVoices",
+    "getWakeLockState",
+    "getWriter",
+    "getYear",
+    "getZoom",
+    "getZoomSettings",
+    "givenName",
+    "global",
+    "globalAlpha",
+    "globalCompositeOperation",
+    "globalPrivacyControl",
+    "globalThis",
+    "glyphOrientationHorizontal",
+    "glyphOrientationVertical",
+    "glyphRef",
+    "go",
+    "goBack",
+    "goForward",
+    "gpu",
+    "grabFrame",
+    "grad",
+    "gradientTransform",
+    "gradientUnits",
+    "grammars",
+    "green",
+    "grid",
+    "grid-area",
+    "grid-auto-columns",
+    "grid-auto-flow",
+    "grid-auto-rows",
+    "grid-column",
+    "grid-column-end",
+    "grid-column-gap",
+    "grid-column-start",
+    "grid-gap",
+    "grid-row",
+    "grid-row-end",
+    "grid-row-gap",
+    "grid-row-start",
+    "grid-template",
+    "grid-template-areas",
+    "grid-template-columns",
+    "grid-template-rows",
+    "gridArea",
+    "gridAutoColumns",
+    "gridAutoFlow",
+    "gridAutoRows",
+    "gridColumn",
+    "gridColumnEnd",
+    "gridColumnGap",
+    "gridColumnStart",
+    "gridGap",
+    "gridRow",
+    "gridRowEnd",
+    "gridRowGap",
+    "gridRowStart",
+    "gridTemplate",
+    "gridTemplateAreas",
+    "gridTemplateColumns",
+    "gridTemplateRows",
+    "gripSpace",
+    "group",
+    "groupBy",
+    "groupCollapsed",
+    "groupEnd",
+    "groupId",
+    "groups",
+    "grow",
+    "growable",
+    "guestProcessId",
+    "guestRenderFrameRoutingId",
+    "hadRecentInput",
+    "hand",
+    "handedness",
+    "hangingBaseline",
+    "hapticActuators",
+    "hardwareConcurrency",
+    "has",
+    "hasAttribute",
+    "hasAttributeNS",
+    "hasAttributes",
+    "hasBeenActive",
+    "hasChildNodes",
+    "hasComposition",
+    "hasDynamicOffset",
+    "hasEnrolledInstrument",
+    "hasExtension",
+    "hasExternalDisplay",
+    "hasFeature",
+    "hasFocus",
+    "hasIndices",
+    "hasInstance",
+    "hasLayout",
+    "hasOrientation",
+    "hasOwn",
+    "hasOwnProperty",
+    "hasPointerCapture",
+    "hasPosition",
+    "hasPrivateToken",
+    "hasReading",
+    "hasRedemptionRecord",
+    "hasRegExpGroups",
+    "hasStorageAccess",
+    "hasUAVisualTransition",
+    "hasUnpartitionedCookieAccess",
+    "hash",
+    "hashChange",
+    "head",
+    "headers",
+    "heading",
+    "height",
+    "hid",
+    "hidden",
+    "hide",
+    "hideFocus",
+    "hidePopover",
+    "high",
+    "highWaterMark",
+    "highlight",
+    "highlights",
+    "highlightsFromPoint",
+    "hint",
+    "hints",
+    "history",
+    "honorificPrefix",
+    "honorificSuffix",
+    "horizontalOverflow",
+    "host",
+    "hostCandidate",
+    "hostname",
+    "hour",
+    "hour12",
+    "hourCycle",
+    "hours",
+    "href",
+    "hrefTranslate",
+    "hreflang",
+    "hspace",
+    "html5TagCheckInerface",
+    "htmlFor",
+    "htmlText",
+    "httpEquiv",
+    "httpRequestStatusCode",
+    "hwTimestamp",
+    "hyphenate-character",
+    "hyphenateCharacter",
+    "hyphenateLimitChars",
+    "hyphens",
+    "hypot",
+    "i18n",
+    "ic",
+    "iccId",
+    "iceConnectionState",
+    "iceGatheringState",
+    "iceTransport",
+    "icon",
+    "iconURL",
+    "id",
+    "identifier",
+    "identity",
+    "ideographicBaseline",
+    "idle",
+    "idpLoginUrl",
+    "ignoreBOM",
+    "ignoreCase",
+    "ignoreDepthValues",
+    "image",
+    "image-orientation",
+    "image-rendering",
+    "imageHeight",
+    "imageOrientation",
+    "imageRendering",
+    "imageSizes",
+    "imageSmoothingEnabled",
+    "imageSmoothingQuality",
+    "imageSrcset",
+    "imageWidth",
+    "images",
+    "ime-mode",
+    "imeMode",
+    "implementation",
+    "importExternalTexture",
+    "importKey",
+    "importNode",
+    "importStylesheet",
+    "imports",
+    "impp",
+    "imul",
+    "in",
+    "in1",
+    "in2",
+    "inBandMetadataTrackDispatchType",
+    "inIncognitoContext",
+    "inRange",
+    "includes",
+    "incognito",
+    "incomingBidirectionalStreams",
+    "incomingHighWaterMark",
+    "incomingMaxAge",
+    "incomingUnidirectionalStreams",
+    "increaseZoomLevel",
+    "incremental",
+    "indeterminate",
+    "index",
+    "indexNames",
+    "indexOf",
+    "indexedDB",
+    "indicate",
+    "indices",
+    "inert",
+    "inertiaDestinationX",
+    "inertiaDestinationY",
+    "info",
+    "inherits",
+    "init",
+    "initAnimationEvent",
+    "initBeforeLoadEvent",
+    "initClipboardEvent",
+    "initCloseEvent",
+    "initCommandEvent",
+    "initCompositionEvent",
+    "initCustomEvent",
+    "initData",
+    "initDataType",
+    "initDeviceMotionEvent",
+    "initDeviceOrientationEvent",
+    "initDragEvent",
+    "initErrorEvent",
+    "initEvent",
+    "initFocusEvent",
+    "initGestureEvent",
+    "initHashChangeEvent",
+    "initKeyEvent",
+    "initKeyboardEvent",
+    "initMSManipulationEvent",
+    "initMessageEvent",
+    "initMouseEvent",
+    "initMouseScrollEvent",
+    "initMouseWheelEvent",
+    "initMutationEvent",
+    "initNSMouseEvent",
+    "initOverflowEvent",
+    "initPageEvent",
+    "initPageTransitionEvent",
+    "initPointerEvent",
+    "initPopStateEvent",
+    "initProgressEvent",
+    "initScrollAreaEvent",
+    "initSimpleGestureEvent",
+    "initStorageEvent",
+    "initTextEvent",
+    "initTimeEvent",
+    "initTouchEvent",
+    "initTransitionEvent",
+    "initUIEvent",
+    "initWebKitAnimationEvent",
+    "initWebKitTransitionEvent",
+    "initWebKitWheelEvent",
+    "initWheelEvent",
+    "initialTime",
+    "initialValue",
+    "initialize",
+    "initiatorType",
+    "inject",
+    "ink",
+    "inline-size",
+    "inlineSize",
+    "inlineVerticalFieldOfView",
+    "inner",
+    "innerHTML",
+    "innerHeight",
+    "innerText",
+    "innerWidth",
+    "input",
+    "inputBuffer",
+    "inputEncoding",
+    "inputMethod",
+    "inputMode",
+    "inputQuota",
+    "inputSource",
+    "inputSources",
+    "inputType",
+    "inputs",
+    "insertAdjacentElement",
+    "insertAdjacentHTML",
+    "insertAdjacentText",
+    "insertBefore",
+    "insertCell",
+    "insertDTMF",
+    "insertData",
+    "insertDebugMarker",
+    "insertItemBefore",
+    "insertNode",
+    "insertRow",
+    "insertRule",
+    "inset",
+    "inset-block",
+    "inset-block-end",
+    "inset-block-start",
+    "inset-inline",
+    "inset-inline-end",
+    "inset-inline-start",
+    "insetBlock",
+    "insetBlockEnd",
+    "insetBlockStart",
+    "insetInline",
+    "insetInlineEnd",
+    "insetInlineStart",
+    "inspect",
+    "install",
+    "installing",
+    "instanceRoot",
+    "instantiate",
+    "instantiateStreaming",
+    "instruments",
+    "int16",
+    "int32",
+    "int8",
+    "integrity",
+    "interactionCount",
+    "interactionId",
+    "interactionMode",
+    "intercept",
+    "interestForElement",
+    "interfaceClass",
+    "interfaceName",
+    "interfaceNumber",
+    "interfaceProtocol",
+    "interfaceSubclass",
+    "interfaces",
+    "interimResults",
+    "internalSubset",
+    "interpretation",
+    "intersection",
+    "intersectionRatio",
+    "intersectionRect",
+    "intersectsNode",
+    "interval",
+    "invalidIteratorState",
+    "invalidateFramebuffer",
+    "invalidateSubFramebuffer",
+    "inverse",
+    "invertSelf",
+    "invoker",
+    "invokerType",
+    "is",
+    "is2D",
+    "isActive",
+    "isAllowedFileSchemeAccess",
+    "isAllowedIncognitoAccess",
+    "isAlternate",
+    "isArray",
+    "isAutoSelected",
+    "isBingCurrentSearchDefault",
+    "isBuffer",
+    "isCandidateWindowVisible",
+    "isChar",
+    "isCollapsed",
+    "isComposing",
+    "isConcatSpreadable",
+    "isConditionalMediationAvailable",
+    "isConfigSupported",
+    "isConnected",
+    "isContentEditable",
+    "isContentHandlerRegistered",
+    "isContextLost",
+    "isDefaultNamespace",
+    "isDirectory",
+    "isDisabled",
+    "isDisjointFrom",
+    "isEnabled",
+    "isEqual",
+    "isEqualNode",
+    "isError",
+    "isExtended",
+    "isExtensible",
+    "isExternalCTAP2SecurityKeySupported",
+    "isFallbackAdapter",
+    "isFile",
+    "isFinite",
+    "isFirstPersonObserver",
+    "isFramebuffer",
+    "isFrozen",
+    "isGenerator",
+    "isHTML",
+    "isHistoryNavigation",
+    "isId",
+    "isIdentity",
+    "isInjected",
+    "isInputPending",
+    "isInteger",
+    "isInternal",
+    "isIntersecting",
+    "isLockFree",
+    "isMap",
+    "isMultiLine",
+    "isNaN",
+    "isOpen",
+    "isPointInFill",
+    "isPointInPath",
+    "isPointInRange",
+    "isPointInStroke",
+    "isPrefAlternate",
+    "isPresenting",
+    "isPrimary",
+    "isProgram",
+    "isPropertyImplicit",
+    "isProtocolHandlerRegistered",
+    "isPrototypeOf",
+    "isQuery",
+    "isRawJSON",
+    "isRenderbuffer",
+    "isSafeInteger",
+    "isSameEntry",
+    "isSameNode",
+    "isSampler",
+    "isScript",
+    "isScriptURL",
+    "isSealed",
+    "isSecureContext",
+    "isSessionSupported",
+    "isShader",
+    "isSubsetOf",
+    "isSupersetOf",
+    "isSupported",
+    "isSync",
+    "isTextEdit",
+    "isTexture",
+    "isTransformFeedback",
+    "isTrusted",
+    "isTypeSupported",
+    "isUserVerifyingPlatformAuthenticatorAvailable",
+    "isVertexArray",
+    "isView",
+    "isVisible",
+    "isWellFormed",
+    "isochronousTransferIn",
+    "isochronousTransferOut",
+    "isolation",
+    "italics",
+    "item",
+    "itemId",
+    "itemProp",
+    "itemRef",
+    "itemScope",
+    "itemType",
+    "itemValue",
+    "items",
+    "iterateNext",
+    "iterationComposite",
+    "iterator",
+    "javaEnabled",
+    "jitterBufferTarget",
+    "jobTitle",
+    "join",
+    "joinAdInterestGroup",
+    "jointName",
+    "json",
+    "justify-content",
+    "justify-items",
+    "justify-self",
+    "justifyContent",
+    "justifyItems",
+    "justifySelf",
+    "k1",
+    "k2",
+    "k3",
+    "k4",
+    "kHz",
+    "keepalive",
+    "kernelMatrix",
+    "kernelUnitLengthX",
+    "kernelUnitLengthY",
+    "kerning",
+    "key",
+    "keyCode",
+    "keyFor",
+    "keyIdentifier",
+    "keyLightEnabled",
+    "keyLocation",
+    "keyPath",
+    "keyStatuses",
+    "keySystem",
+    "keyText",
+    "keyUsage",
+    "keyboard",
+    "keys",
+    "keytype",
+    "kind",
+    "knee",
+    "knownSources",
+    "label",
+    "labels",
+    "lang",
+    "language",
+    "languages",
+    "largeArcFlag",
+    "last",
+    "lastChild",
+    "lastElementChild",
+    "lastError",
+    "lastEventId",
+    "lastIndex",
+    "lastIndexOf",
+    "lastInputTime",
+    "lastMatch",
+    "lastMessageSubject",
+    "lastMessageType",
+    "lastModified",
+    "lastModifiedDate",
+    "lastPage",
+    "lastParen",
+    "lastState",
+    "lastStyleSheetSet",
+    "latency",
+    "latitude",
+    "launchQueue",
+    "layerName",
+    "layerX",
+    "layerY",
+    "layout",
+    "layoutFlow",
+    "layoutGrid",
+    "layoutGridChar",
+    "layoutGridLine",
+    "layoutGridMode",
+    "layoutGridType",
+    "lbound",
+    "leaveAdInterestGroup",
+    "left",
+    "leftContext",
+    "leftDegrees",
+    "leftMargin",
+    "leftProjectionMatrix",
+    "leftViewMatrix",
+    "length",
+    "lengthAdjust",
+    "lengthComputable",
+    "letter-spacing",
+    "letterSpacing",
+    "level",
+    "lh",
+    "lighting-color",
+    "lightingColor",
+    "limitingConeAngle",
+    "limits",
+    "line",
+    "line-break",
+    "line-height",
+    "lineAlign",
+    "lineBreak",
+    "lineCap",
+    "lineDashOffset",
+    "lineGapOverride",
+    "lineHeight",
+    "lineJoin",
+    "lineNum",
+    "lineNumber",
+    "linePos",
+    "lineTo",
+    "lineWidth",
+    "linearAcceleration",
+    "linearRampToValueAtTime",
+    "linearVelocity",
+    "lineno",
+    "lines",
+    "link",
+    "linkColor",
+    "linkProgram",
+    "links",
+    "list",
+    "list-style",
+    "list-style-image",
+    "list-style-position",
+    "list-style-type",
+    "listStyle",
+    "listStyleImage",
+    "listStylePosition",
+    "listStyleType",
+    "listener",
+    "listeners",
+    "load",
+    "loadEventEnd",
+    "loadEventStart",
+    "loadOp",
+    "loadTime",
+    "loadTimes",
+    "loaded",
+    "loading",
+    "localDescription",
+    "localName",
+    "localService",
+    "localStorage",
+    "locale",
+    "localeCompare",
+    "location",
+    "locationbar",
+    "lock",
+    "locked",
+    "lockedFile",
+    "locks",
+    "lodMaxClamp",
+    "lodMinClamp",
+    "log",
+    "log10",
+    "log1p",
+    "log2",
+    "logicalXDPI",
+    "logicalYDPI",
+    "login",
+    "loglevel",
+    "longDesc",
+    "longitude",
+    "lookupNamespaceURI",
+    "lookupPrefix",
+    "loop",
+    "loopEnd",
+    "loopStart",
+    "looping",
+    "lost",
+    "low",
+    "lower",
+    "lowerBound",
+    "lowerOpen",
+    "lowsrc",
+    "lvb",
+    "lvh",
+    "lvi",
+    "lvmax",
+    "lvmin",
+    "lvw",
+    "m11",
+    "m12",
+    "m13",
+    "m14",
+    "m21",
+    "m22",
+    "m23",
+    "m24",
+    "m31",
+    "m32",
+    "m33",
+    "m34",
+    "m41",
+    "m42",
+    "m43",
+    "m44",
+    "magFilter",
+    "makeXRCompatible",
+    "managed",
+    "management",
+    "manifest",
+    "manufacturer",
+    "manufacturerName",
+    "map",
+    "mapAsync",
+    "mapState",
+    "mappedAtCreation",
+    "mapping",
+    "margin",
+    "margin-block",
+    "margin-block-end",
+    "margin-block-start",
+    "margin-bottom",
+    "margin-inline",
+    "margin-inline-end",
+    "margin-inline-start",
+    "margin-left",
+    "margin-right",
+    "margin-top",
+    "marginBlock",
+    "marginBlockEnd",
+    "marginBlockStart",
+    "marginBottom",
+    "marginHeight",
+    "marginInline",
+    "marginInlineEnd",
+    "marginInlineStart",
+    "marginLeft",
+    "marginRight",
+    "marginTop",
+    "marginWidth",
+    "mark",
+    "marker",
+    "marker-end",
+    "marker-mid",
+    "marker-offset",
+    "marker-start",
+    "markerEnd",
+    "markerHeight",
+    "markerMid",
+    "markerOffset",
+    "markerStart",
+    "markerUnits",
+    "markerWidth",
+    "marks",
+    "mask",
+    "mask-clip",
+    "mask-composite",
+    "mask-image",
+    "mask-mode",
+    "mask-origin",
+    "mask-position",
+    "mask-position-x",
+    "mask-position-y",
+    "mask-repeat",
+    "mask-size",
+    "mask-type",
+    "maskClip",
+    "maskComposite",
+    "maskContentUnits",
+    "maskImage",
+    "maskMode",
+    "maskOrigin",
+    "maskPosition",
+    "maskPositionX",
+    "maskPositionY",
+    "maskRepeat",
+    "maskSize",
+    "maskType",
+    "maskUnits",
+    "match",
+    "matchAll",
+    "matchMedia",
+    "matchMedium",
+    "matchPatterns",
+    "matches",
+    "math-depth",
+    "math-style",
+    "mathDepth",
+    "mathShift",
+    "mathStyle",
+    "matrix",
+    "matrixTransform",
+    "max",
+    "max-block-size",
+    "max-height",
+    "max-inline-size",
+    "max-width",
+    "maxActions",
+    "maxAlternatives",
+    "maxAnisotropy",
+    "maxBindGroups",
+    "maxBindGroupsPlusVertexBuffers",
+    "maxBindingsPerBindGroup",
+    "maxBlockSize",
+    "maxBufferSize",
+    "maxByteLength",
+    "maxChannelCount",
+    "maxChannels",
+    "maxColorAttachmentBytesPerSample",
+    "maxColorAttachments",
+    "maxComputeInvocationsPerWorkgroup",
+    "maxComputeWorkgroupSizeX",
+    "maxComputeWorkgroupSizeY",
+    "maxComputeWorkgroupSizeZ",
+    "maxComputeWorkgroupStorageSize",
+    "maxComputeWorkgroupsPerDimension",
+    "maxConnectionsPerServer",
+    "maxDatagramSize",
+    "maxDecibels",
+    "maxDistance",
+    "maxDrawCount",
+    "maxDynamicStorageBuffersPerPipelineLayout",
+    "maxDynamicUniformBuffersPerPipelineLayout",
+    "maxHeight",
+    "maxInlineSize",
+    "maxInterStageShaderComponents",
+    "maxInterStageShaderVariables",
+    "maxLayers",
+    "maxLength",
+    "maxMessageSize",
+    "maxPacketLifeTime",
+    "maxRetransmits",
+    "maxSampledTexturesPerShaderStage",
+    "maxSamplersPerShaderStage",
+    "maxStorageBufferBindingSize",
+    "maxStorageBuffersPerShaderStage",
+    "maxStorageTexturesPerShaderStage",
+    "maxTextureArrayLayers",
+    "maxTextureDimension1D",
+    "maxTextureDimension2D",
+    "maxTextureDimension3D",
+    "maxTouchPoints",
+    "maxUniformBufferBindingSize",
+    "maxUniformBuffersPerShaderStage",
+    "maxValue",
+    "maxVertexAttributes",
+    "maxVertexBufferArrayStride",
+    "maxVertexBuffers",
+    "maxWidth",
+    "maximumLatency",
+    "measure",
+    "measureInputUsage",
+    "measureText",
+    "media",
+    "mediaCapabilities",
+    "mediaDevices",
+    "mediaElement",
+    "mediaGroup",
+    "mediaKeys",
+    "mediaSession",
+    "mediaStream",
+    "mediaText",
+    "meetOrSlice",
+    "memory",
+    "menubar",
+    "menus",
+    "menusChild",
+    "menusInternal",
+    "mergeAttributes",
+    "message",
+    "messageClass",
+    "messageHandlers",
+    "messageType",
+    "messages",
+    "metaKey",
+    "metadata",
+    "method",
+    "methodDetails",
+    "methodName",
+    "microseconds",
+    "mid",
+    "milliseconds",
+    "mimeType",
+    "mimeTypes",
+    "min",
+    "min-block-size",
+    "min-height",
+    "min-inline-size",
+    "min-width",
+    "minBindingSize",
+    "minBlockSize",
+    "minDecibels",
+    "minFilter",
+    "minHeight",
+    "minInlineSize",
+    "minLength",
+    "minStorageBufferOffsetAlignment",
+    "minUniformBufferOffsetAlignment",
+    "minValue",
+    "minWidth",
+    "minimumLatency",
+    "minute",
+    "minutes",
+    "mipLevel",
+    "mipLevelCount",
+    "mipmapFilter",
+    "miterLimit",
+    "mix-blend-mode",
+    "mixBlendMode",
+    "mm",
+    "mobile",
+    "mode",
+    "model",
+    "modify",
+    "module",
+    "month",
+    "months",
+    "mount",
+    "move",
+    "moveBefore",
+    "moveBy",
+    "moveEnd",
+    "moveFirst",
+    "moveFocusDown",
+    "moveFocusLeft",
+    "moveFocusRight",
+    "moveFocusUp",
+    "moveInSuccession",
+    "moveNext",
+    "moveRow",
+    "moveStart",
+    "moveTo",
+    "moveToBookmark",
+    "moveToElementText",
+    "moveToPoint",
+    "movementX",
+    "movementY",
+    "mozAdd",
+    "mozAnimationStartTime",
+    "mozAnon",
+    "mozApps",
+    "mozAudioCaptured",
+    "mozAudioChannelType",
+    "mozAutoplayEnabled",
+    "mozCancelAnimationFrame",
+    "mozCancelFullScreen",
+    "mozCancelRequestAnimationFrame",
+    "mozCaptureStream",
+    "mozCaptureStreamUntilEnded",
+    "mozClearDataAt",
+    "mozContact",
+    "mozContacts",
+    "mozCreateFileHandle",
+    "mozCurrentTransform",
+    "mozCurrentTransformInverse",
+    "mozCursor",
+    "mozDash",
+    "mozDashOffset",
+    "mozDecodedFrames",
+    "mozExitPointerLock",
+    "mozFillRule",
+    "mozFragmentEnd",
+    "mozFrameDelay",
+    "mozFullScreen",
+    "mozFullScreenElement",
+    "mozFullScreenEnabled",
+    "mozGetAll",
+    "mozGetAllKeys",
+    "mozGetAsFile",
+    "mozGetDataAt",
+    "mozGetMetadata",
+    "mozGetUserMedia",
+    "mozHasAudio",
+    "mozHasItem",
+    "mozHidden",
+    "mozImageSmoothingEnabled",
+    "mozIndexedDB",
+    "mozInnerScreenX",
+    "mozInnerScreenY",
+    "mozInputSource",
+    "mozIsTextField",
+    "mozItem",
+    "mozItemCount",
+    "mozItems",
+    "mozLength",
+    "mozLockOrientation",
+    "mozMatchesSelector",
+    "mozMovementX",
+    "mozMovementY",
+    "mozOpaque",
+    "mozOrientation",
+    "mozPaintCount",
+    "mozPaintedFrames",
+    "mozParsedFrames",
+    "mozPay",
+    "mozPointerLockElement",
+    "mozPresentedFrames",
+    "mozPreservesPitch",
+    "mozPressure",
+    "mozPrintCallback",
+    "mozRTCIceCandidate",
+    "mozRTCPeerConnection",
+    "mozRTCSessionDescription",
+    "mozRemove",
+    "mozRequestAnimationFrame",
+    "mozRequestFullScreen",
+    "mozRequestPointerLock",
+    "mozSetDataAt",
+    "mozSetImageElement",
+    "mozSourceNode",
+    "mozSrcObject",
+    "mozSystem",
+    "mozTCPSocket",
+    "mozTextStyle",
+    "mozTypesAt",
+    "mozUnlockOrientation",
+    "mozUserCancelled",
+    "mozVisibilityState",
+    "ms",
+    "msAnimation",
+    "msAnimationDelay",
+    "msAnimationDirection",
+    "msAnimationDuration",
+    "msAnimationFillMode",
+    "msAnimationIterationCount",
+    "msAnimationName",
+    "msAnimationPlayState",
+    "msAnimationStartTime",
+    "msAnimationTimingFunction",
+    "msBackfaceVisibility",
+    "msBlockProgression",
+    "msCSSOMElementFloatMetrics",
+    "msCaching",
+    "msCachingEnabled",
+    "msCancelRequestAnimationFrame",
+    "msCapsLockWarningOff",
+    "msClearImmediate",
+    "msClose",
+    "msContentZoomChaining",
+    "msContentZoomFactor",
+    "msContentZoomLimit",
+    "msContentZoomLimitMax",
+    "msContentZoomLimitMin",
+    "msContentZoomSnap",
+    "msContentZoomSnapPoints",
+    "msContentZoomSnapType",
+    "msContentZooming",
+    "msConvertURL",
+    "msCrypto",
+    "msDoNotTrack",
+    "msElementsFromPoint",
+    "msElementsFromRect",
+    "msExitFullscreen",
+    "msExtendedCode",
+    "msFillRule",
+    "msFirstPaint",
+    "msFlex",
+    "msFlexAlign",
+    "msFlexDirection",
+    "msFlexFlow",
+    "msFlexItemAlign",
+    "msFlexLinePack",
+    "msFlexNegative",
+    "msFlexOrder",
+    "msFlexPack",
+    "msFlexPositive",
+    "msFlexPreferredSize",
+    "msFlexWrap",
+    "msFlowFrom",
+    "msFlowInto",
+    "msFontFeatureSettings",
+    "msFullscreenElement",
+    "msFullscreenEnabled",
+    "msGetInputContext",
+    "msGetRegionContent",
+    "msGetUntransformedBounds",
+    "msGraphicsTrustStatus",
+    "msGridColumn",
+    "msGridColumnAlign",
+    "msGridColumnSpan",
+    "msGridColumns",
+    "msGridRow",
+    "msGridRowAlign",
+    "msGridRowSpan",
+    "msGridRows",
+    "msHidden",
+    "msHighContrastAdjust",
+    "msHyphenateLimitChars",
+    "msHyphenateLimitLines",
+    "msHyphenateLimitZone",
+    "msHyphens",
+    "msImageSmoothingEnabled",
+    "msImeAlign",
+    "msIndexedDB",
+    "msInterpolationMode",
+    "msIsStaticHTML",
+    "msKeySystem",
+    "msKeys",
+    "msLaunchUri",
+    "msLockOrientation",
+    "msManipulationViewsEnabled",
+    "msMatchMedia",
+    "msMatchesSelector",
+    "msMaxTouchPoints",
+    "msOrientation",
+    "msOverflowStyle",
+    "msPerspective",
+    "msPerspectiveOrigin",
+    "msPlayToDisabled",
+    "msPlayToPreferredSourceUri",
+    "msPlayToPrimary",
+    "msPointerEnabled",
+    "msRegionOverflow",
+    "msReleasePointerCapture",
+    "msRequestAnimationFrame",
+    "msRequestFullscreen",
+    "msSaveBlob",
+    "msSaveOrOpenBlob",
+    "msScrollChaining",
+    "msScrollLimit",
+    "msScrollLimitXMax",
+    "msScrollLimitXMin",
+    "msScrollLimitYMax",
+    "msScrollLimitYMin",
+    "msScrollRails",
+    "msScrollSnapPointsX",
+    "msScrollSnapPointsY",
+    "msScrollSnapType",
+    "msScrollSnapX",
+    "msScrollSnapY",
+    "msScrollTranslation",
+    "msSetImmediate",
+    "msSetMediaKeys",
+    "msSetPointerCapture",
+    "msTextCombineHorizontal",
+    "msTextSizeAdjust",
+    "msToBlob",
+    "msTouchAction",
+    "msTouchSelect",
+    "msTraceAsyncCallbackCompleted",
+    "msTraceAsyncCallbackStarting",
+    "msTraceAsyncOperationCompleted",
+    "msTraceAsyncOperationStarting",
+    "msTransform",
+    "msTransformOrigin",
+    "msTransformStyle",
+    "msTransition",
+    "msTransitionDelay",
+    "msTransitionDuration",
+    "msTransitionProperty",
+    "msTransitionTimingFunction",
+    "msUnlockOrientation",
+    "msUpdateAsyncCallbackRelation",
+    "msUserSelect",
+    "msVisibilityState",
+    "msWrapFlow",
+    "msWrapMargin",
+    "msWrapThrough",
+    "msWriteProfilerMark",
+    "msZoom",
+    "msZoomTo",
+    "mt",
+    "mul",
+    "multiEntry",
+    "multiSelectionObj",
+    "multiline",
+    "multiple",
+    "multiply",
+    "multiplySelf",
+    "multisample",
+    "multisampled",
+    "mutableFile",
+    "muted",
+    "n",
+    "nacl_arch",
+    "name",
+    "nameList",
+    "nameProp",
+    "namedItem",
+    "namedRecordset",
+    "names",
+    "namespaceURI",
+    "namespaces",
+    "nanoseconds",
+    "nativeApplication",
+    "nativeMap",
+    "nativeObjectCreate",
+    "nativeSet",
+    "nativeWeakMap",
+    "naturalHeight",
+    "naturalWidth",
+    "navigate",
+    "navigation",
+    "navigationMode",
+    "navigationPreload",
+    "navigationStart",
+    "navigationType",
+    "navigator",
+    "near",
+    "nearestViewportElement",
+    "negative",
+    "negotiated",
+    "netscape",
+    "networkState",
+    "networkStatus",
+    "newScale",
+    "newState",
+    "newTranslate",
+    "newURL",
+    "newValue",
+    "newValueSpecifiedUnits",
+    "newVersion",
+    "newhome",
+    "next",
+    "nextElementSibling",
+    "nextHopProtocol",
+    "nextNode",
+    "nextPage",
+    "nextSibling",
+    "nickname",
+    "noHref",
+    "noModule",
+    "noResize",
+    "noShade",
+    "noValidate",
+    "noWrap",
+    "node",
+    "nodeName",
+    "nodeType",
+    "nodeValue",
+    "nonce",
+    "normDepthBufferFromNormView",
+    "normalize",
+    "normalizedPathSegList",
+    "normandyAddonStudy",
+    "notRestoredReasons",
+    "notationName",
+    "notations",
+    "note",
+    "noteGrainOn",
+    "noteOff",
+    "noteOn",
+    "notifications",
+    "notify",
+    "now",
+    "npnNegotiatedProtocol",
+    "numOctaves",
+    "number",
+    "numberOfChannels",
+    "numberOfFrames",
+    "numberOfInputs",
+    "numberOfItems",
+    "numberOfOutputs",
+    "numberValue",
+    "numberingSystem",
+    "numeric",
+    "oMatchesSelector",
+    "object",
+    "object-fit",
+    "object-position",
+    "objectFit",
+    "objectPosition",
+    "objectStore",
+    "objectStoreNames",
+    "objectType",
+    "observe",
+    "observedAttributes",
+    "occlusionQuerySet",
+    "of",
+    "off",
+    "offscreenBuffering",
+    "offset",
+    "offset-anchor",
+    "offset-distance",
+    "offset-path",
+    "offset-position",
+    "offset-rotate",
+    "offsetAnchor",
+    "offsetDistance",
+    "offsetHeight",
+    "offsetLeft",
+    "offsetNode",
+    "offsetParent",
+    "offsetPath",
+    "offsetPosition",
+    "offsetRotate",
+    "offsetTop",
+    "offsetWidth",
+    "offsetX",
+    "offsetY",
+    "ok",
+    "oldState",
+    "oldURL",
+    "oldValue",
+    "oldVersion",
+    "olderShadowRoot",
+    "omnibox",
+    "on",
+    "onActivated",
+    "onAdded",
+    "onAttached",
+    "onBoundsChanged",
+    "onBrowserUpdateAvailable",
+    "onClicked",
+    "onCommitFiberRoot",
+    "onCommitFiberUnmount",
+    "onConnect",
+    "onConnectExternal",
+    "onConnectNative",
+    "onCreated",
+    "onDetached",
+    "onDisabled",
+    "onEnabled",
+    "onFocusChanged",
+    "onHighlighted",
+    "onInstalled",
+    "onLine",
+    "onMessage",
+    "onMessageExternal",
+    "onMoved",
+    "onPerformanceWarning",
+    "onPostCommitFiberRoot",
+    "onRemoved",
+    "onReplaced",
+    "onRestartRequired",
+    "onStartup",
+    "onSubmittedWorkDone",
+    "onSuspend",
+    "onSuspendCanceled",
+    "onUninstalled",
+    "onUpdateAvailable",
+    "onUpdated",
+    "onUserScriptConnect",
+    "onUserScriptMessage",
+    "onUserSettingsChanged",
+    "onZoomChange",
+    "onabort",
+    "onabsolutedeviceorientation",
+    "onactivate",
+    "onactive",
+    "onaddsourcebuffer",
+    "onaddstream",
+    "onaddtrack",
+    "onafterprint",
+    "onafterscriptexecute",
+    "onafterupdate",
+    "onanimationcancel",
+    "onanimationend",
+    "onanimationiteration",
+    "onanimationstart",
+    "onappinstalled",
+    "onaudioend",
+    "onaudioprocess",
+    "onaudiostart",
+    "onautocomplete",
+    "onautocompleteerror",
+    "onauxclick",
+    "onbeforeactivate",
+    "onbeforecopy",
+    "onbeforecut",
+    "onbeforedeactivate",
+    "onbeforeeditfocus",
+    "onbeforeinput",
+    "onbeforeinstallprompt",
+    "onbeforematch",
+    "onbeforepaste",
+    "onbeforeprint",
+    "onbeforescriptexecute",
+    "onbeforetoggle",
+    "onbeforeunload",
+    "onbeforeupdate",
+    "onbeforexrselect",
+    "onbegin",
+    "onblocked",
+    "onblur",
+    "onbounce",
+    "onboundary",
+    "onbufferedamountlow",
+    "oncached",
+    "oncancel",
+    "oncandidatewindowhide",
+    "oncandidatewindowshow",
+    "oncandidatewindowupdate",
+    "oncanplay",
+    "oncanplaythrough",
+    "oncapturehandlechange",
+    "once",
+    "oncellchange",
+    "onchange",
+    "oncharacterboundsupdate",
+    "oncharacteristicvaluechanged",
+    "onchargingchange",
+    "onchargingtimechange",
+    "onchecking",
+    "onclick",
+    "onclose",
+    "onclosing",
+    "oncommand",
+    "oncompassneedscalibration",
+    "oncomplete",
+    "oncompositionend",
+    "oncompositionstart",
+    "onconnect",
+    "onconnecting",
+    "onconnectionavailable",
+    "onconnectionstatechange",
+    "oncontentvisibilityautostatechange",
+    "oncontextlost",
+    "oncontextmenu",
+    "oncontextrestored",
+    "oncontrollerchange",
+    "oncontrolselect",
+    "oncopy",
+    "oncuechange",
+    "oncurrententrychange",
+    "oncurrentscreenchange",
+    "oncut",
+    "ondataavailable",
+    "ondatachannel",
+    "ondatasetchanged",
+    "ondatasetcomplete",
+    "ondblclick",
+    "ondeactivate",
+    "ondequeue",
+    "ondevicechange",
+    "ondevicelight",
+    "ondevicemotion",
+    "ondeviceorientation",
+    "ondeviceorientationabsolute",
+    "ondeviceproximity",
+    "ondischargingtimechange",
+    "ondisconnect",
+    "ondisplay",
+    "ondispose",
+    "ondownloading",
+    "ondownloadprogress",
+    "ondrag",
+    "ondragend",
+    "ondragenter",
+    "ondragexit",
+    "ondragleave",
+    "ondragover",
+    "ondragstart",
+    "ondrop",
+    "ondurationchange",
+    "onemptied",
+    "onencrypted",
+    "onend",
+    "onended",
+    "onenter",
+    "onenterpictureinpicture",
+    "onerror",
+    "onerrorupdate",
+    "onexit",
+    "onfencedtreeclick",
+    "onfilterchange",
+    "onfinish",
+    "onfocus",
+    "onfocusin",
+    "onfocusout",
+    "onformdata",
+    "onfreeze",
+    "onfullscreenchange",
+    "onfullscreenerror",
+    "ongamepadconnected",
+    "ongamepaddisconnected",
+    "ongatheringstatechange",
+    "ongattserverdisconnected",
+    "ongeometrychange",
+    "ongesturechange",
+    "ongestureend",
+    "ongesturestart",
+    "ongotpointercapture",
+    "onhashchange",
+    "onhelp",
+    "onicecandidate",
+    "onicecandidateerror",
+    "oniceconnectionstatechange",
+    "onicegatheringstatechange",
+    "oninactive",
+    "oninput",
+    "oninputreport",
+    "oninputsourceschange",
+    "oninvalid",
+    "onkeydown",
+    "onkeypress",
+    "onkeystatuseschange",
+    "onkeyup",
+    "onlanguagechange",
+    "onlayoutcomplete",
+    "onleavepictureinpicture",
+    "onlevelchange",
+    "onload",
+    "onloadT",
+    "onloadeddata",
+    "onloadedmetadata",
+    "onloadend",
+    "onloading",
+    "onloadingdone",
+    "onloadingerror",
+    "onloadstart",
+    "onlosecapture",
+    "onlostpointercapture",
+    "only",
+    "onmanagedconfigurationchange",
+    "onmark",
+    "onmessage",
+    "onmessageerror",
+    "onmidimessage",
+    "onmousedown",
+    "onmouseenter",
+    "onmouseleave",
+    "onmousemove",
+    "onmouseout",
+    "onmouseover",
+    "onmouseup",
+    "onmousewheel",
+    "onmove",
+    "onmoveend",
+    "onmovestart",
+    "onmozfullscreenchange",
+    "onmozfullscreenerror",
+    "onmozorientationchange",
+    "onmozpointerlockchange",
+    "onmozpointerlockerror",
+    "onmscontentzoom",
+    "onmsfullscreenchange",
+    "onmsfullscreenerror",
+    "onmsgesturechange",
+    "onmsgesturedoubletap",
+    "onmsgestureend",
+    "onmsgesturehold",
+    "onmsgesturestart",
+    "onmsgesturetap",
+    "onmsgotpointercapture",
+    "onmsinertiastart",
+    "onmslostpointercapture",
+    "onmsmanipulationstatechanged",
+    "onmsneedkey",
+    "onmsorientationchange",
+    "onmspointercancel",
+    "onmspointerdown",
+    "onmspointerenter",
+    "onmspointerhover",
+    "onmspointerleave",
+    "onmspointermove",
+    "onmspointerout",
+    "onmspointerover",
+    "onmspointerup",
+    "onmssitemodejumplistitemremoved",
+    "onmsthumbnailclick",
+    "onmute",
+    "onnavigate",
+    "onnavigateerror",
+    "onnavigatesuccess",
+    "onnegotiationneeded",
+    "onnomatch",
+    "onnoupdate",
+    "onobsolete",
+    "onoffline",
+    "ononline",
+    "onopen",
+    "onorientationchange",
+    "onpagechange",
+    "onpagehide",
+    "onpagereveal",
+    "onpageshow",
+    "onpageswap",
+    "onpaste",
+    "onpause",
+    "onpayerdetailchange",
+    "onpaymentmethodchange",
+    "onplay",
+    "onplaying",
+    "onpluginstreamstart",
+    "onpointercancel",
+    "onpointerdown",
+    "onpointerenter",
+    "onpointerleave",
+    "onpointerlockchange",
+    "onpointerlockerror",
+    "onpointermove",
+    "onpointerout",
+    "onpointerover",
+    "onpointerrawupdate",
+    "onpointerup",
+    "onpopstate",
+    "onprerenderingchange",
+    "onprioritychange",
+    "onprocessorerror",
+    "onprogress",
+    "onpropertychange",
+    "onratechange",
+    "onreading",
+    "onreadystatechange",
+    "onreflectionchange",
+    "onrejectionhandled",
+    "onrelease",
+    "onremove",
+    "onremovesourcebuffer",
+    "onremovestream",
+    "onremovetrack",
+    "onrepeat",
+    "onreset",
+    "onresize",
+    "onresizeend",
+    "onresizestart",
+    "onresourcetimingbufferfull",
+    "onresult",
+    "onresume",
+    "onrowenter",
+    "onrowexit",
+    "onrowsdelete",
+    "onrowsinserted",
+    "onscreenschange",
+    "onscroll",
+    "onscrollend",
+    "onscrollsnapchange",
+    "onscrollsnapchanging",
+    "onsearch",
+    "onsecuritypolicyviolation",
+    "onseeked",
+    "onseeking",
+    "onselect",
+    "onselectedcandidatepairchange",
+    "onselectend",
+    "onselectionchange",
+    "onselectstart",
+    "onshippingaddresschange",
+    "onshippingoptionchange",
+    "onshow",
+    "onsignalingstatechange",
+    "onsinkchange",
+    "onslotchange",
+    "onsoundend",
+    "onsoundstart",
+    "onsourceclose",
+    "onsourceclosed",
+    "onsourceended",
+    "onsourceopen",
+    "onspeechend",
+    "onspeechstart",
+    "onsqueeze",
+    "onsqueezeend",
+    "onsqueezestart",
+    "onstalled",
+    "onstart",
+    "onstatechange",
+    "onstop",
+    "onstorage",
+    "onstoragecommit",
+    "onsubmit",
+    "onsuccess",
+    "onsuspend",
+    "onterminate",
+    "ontextformatupdate",
+    "ontextinput",
+    "ontextupdate",
+    "ontimeout",
+    "ontimeupdate",
+    "ontoggle",
+    "ontonechange",
+    "ontouchcancel",
+    "ontouchend",
+    "ontouchmove",
+    "ontouchstart",
+    "ontrack",
+    "ontransitioncancel",
+    "ontransitionend",
+    "ontransitionrun",
+    "ontransitionstart",
+    "onuncapturederror",
+    "onunhandledrejection",
+    "onunload",
+    "onunmute",
+    "onupdate",
+    "onupdateend",
+    "onupdatefound",
+    "onupdateready",
+    "onupdatestart",
+    "onupgradeneeded",
+    "onuserproximity",
+    "onversionchange",
+    "onvisibilitychange",
+    "onvoiceschanged",
+    "onvolumechange",
+    "onvrdisplayactivate",
+    "onvrdisplayconnect",
+    "onvrdisplaydeactivate",
+    "onvrdisplaydisconnect",
+    "onvrdisplaypresentchange",
+    "onwaiting",
+    "onwaitingforkey",
+    "onwarning",
+    "onwebkitanimationend",
+    "onwebkitanimationiteration",
+    "onwebkitanimationstart",
+    "onwebkitcurrentplaybacktargetiswirelesschanged",
+    "onwebkitfullscreenchange",
+    "onwebkitfullscreenerror",
+    "onwebkitkeyadded",
+    "onwebkitkeyerror",
+    "onwebkitkeymessage",
+    "onwebkitneedkey",
+    "onwebkitorientationchange",
+    "onwebkitplaybacktargetavailabilitychanged",
+    "onwebkitpointerlockchange",
+    "onwebkitpointerlockerror",
+    "onwebkitresourcetimingbufferfull",
+    "onwebkittransitionend",
+    "onwheel",
+    "onzoom",
+    "onzoomlevelchange",
+    "opacity",
+    "open",
+    "openCursor",
+    "openDatabase",
+    "openKeyCursor",
+    "openOptionsPage",
+    "openOrClosedShadowRoot",
+    "openPopup",
+    "opened",
+    "opener",
+    "opera",
+    "operation",
+    "operationType",
+    "operator",
+    "opr",
+    "optimum",
+    "options",
+    "or",
+    "order",
+    "orderX",
+    "orderY",
+    "ordered",
+    "org",
+    "organization",
+    "orient",
+    "orientAngle",
+    "orientType",
+    "orientation",
+    "orientationX",
+    "orientationY",
+    "orientationZ",
+    "origin",
+    "originAgentCluster",
+    "originalPolicy",
+    "originalTarget",
+    "ornaments",
+    "orphans",
+    "os",
+    "oscpu",
+    "outerHTML",
+    "outerHeight",
+    "outerText",
+    "outerWidth",
+    "outgoingHighWaterMark",
+    "outgoingMaxAge",
+    "outline",
+    "outline-color",
+    "outline-offset",
+    "outline-style",
+    "outline-width",
+    "outlineColor",
+    "outlineOffset",
+    "outlineStyle",
+    "outlineWidth",
+    "outputBuffer",
+    "outputChannelCount",
+    "outputLanguage",
+    "outputLatency",
+    "outputs",
+    "overallProgress",
+    "overflow",
+    "overflow-anchor",
+    "overflow-block",
+    "overflow-clip-margin",
+    "overflow-inline",
+    "overflow-wrap",
+    "overflow-x",
+    "overflow-y",
+    "overflowAnchor",
+    "overflowBlock",
+    "overflowClipMargin",
+    "overflowInline",
+    "overflowWrap",
+    "overflowX",
+    "overflowY",
+    "overlaysContent",
+    "overrideColors",
+    "overrideMimeType",
+    "oversample",
+    "overscroll-behavior",
+    "overscroll-behavior-block",
+    "overscroll-behavior-inline",
+    "overscroll-behavior-x",
+    "overscroll-behavior-y",
+    "overscrollBehavior",
+    "overscrollBehaviorBlock",
+    "overscrollBehaviorInline",
+    "overscrollBehaviorX",
+    "overscrollBehaviorY",
+    "ownKeys",
+    "ownerDocument",
+    "ownerElement",
+    "ownerNode",
+    "ownerRule",
+    "ownerSVGElement",
+    "owningElement",
+    "p1",
+    "p2",
+    "p3",
+    "p4",
+    "packetSize",
+    "packets",
+    "pad",
+    "padEnd",
+    "padStart",
+    "padding",
+    "padding-block",
+    "padding-block-end",
+    "padding-block-start",
+    "padding-bottom",
+    "padding-inline",
+    "padding-inline-end",
+    "padding-inline-start",
+    "padding-left",
+    "padding-right",
+    "padding-top",
+    "paddingBlock",
+    "paddingBlockEnd",
+    "paddingBlockStart",
+    "paddingBottom",
+    "paddingInline",
+    "paddingInlineEnd",
+    "paddingInlineStart",
+    "paddingLeft",
+    "paddingRight",
+    "paddingTop",
+    "page",
+    "page-break-after",
+    "page-break-before",
+    "page-break-inside",
+    "page-orientation",
+    "pageAction",
+    "pageBreakAfter",
+    "pageBreakBefore",
+    "pageBreakInside",
+    "pageCount",
+    "pageLeft",
+    "pageOrientation",
+    "pageT",
+    "pageTop",
+    "pageX",
+    "pageXOffset",
+    "pageY",
+    "pageYOffset",
+    "pages",
+    "paint-order",
+    "paintOrder",
+    "paintRequests",
+    "paintTime",
+    "paintType",
+    "paintWorklet",
+    "palette",
+    "pan",
+    "panningModel",
+    "parameterData",
+    "parameters",
+    "parent",
+    "parentElement",
+    "parentNode",
+    "parentRule",
+    "parentStyleSheet",
+    "parentTextEdit",
+    "parentWindow",
+    "parse",
+    "parseAll",
+    "parseCreationOptionsFromJSON",
+    "parseFloat",
+    "parseFromString",
+    "parseHTMLUnsafe",
+    "parseInt",
+    "parseRequestOptionsFromJSON",
+    "part",
+    "participants",
+    "passOp",
+    "passive",
+    "password",
+    "pasteHTML",
+    "path",
+    "pathLength",
+    "pathSegList",
+    "pathSegType",
+    "pathSegTypeAsLetter",
+    "pathname",
+    "pattern",
+    "patternContentUnits",
+    "patternMismatch",
+    "patternTransform",
+    "patternUnits",
+    "pause",
+    "pauseAnimations",
+    "pauseDepthSensing",
+    "pauseDuration",
+    "pauseOnExit",
+    "pauseProfilers",
+    "pauseTransformFeedback",
+    "paused",
+    "payerEmail",
+    "payerName",
+    "payerPhone",
+    "paymentManager",
+    "pc",
+    "pdfViewerEnabled",
+    "peerIdentity",
+    "pending",
+    "pendingLocalDescription",
+    "pendingRemoteDescription",
+    "percent",
+    "performance",
+    "periodicSync",
+    "permission",
+    "permissionState",
+    "permissions",
+    "persist",
+    "persisted",
+    "persistentDeviceId",
+    "personalbar",
+    "perspective",
+    "perspective-origin",
+    "perspectiveOrigin",
+    "phone",
+    "phoneticFamilyName",
+    "phoneticGivenName",
+    "photo",
+    "phrase",
+    "phrases",
+    "pictureInPictureChild",
+    "pictureInPictureElement",
+    "pictureInPictureEnabled",
+    "pictureInPictureWindow",
+    "ping",
+    "pipeThrough",
+    "pipeTo",
+    "pitch",
+    "pixelBottom",
+    "pixelDepth",
+    "pixelFormat",
+    "pixelHeight",
+    "pixelLeft",
+    "pixelRight",
+    "pixelStorei",
+    "pixelTop",
+    "pixelUnitToMillimeterX",
+    "pixelUnitToMillimeterY",
+    "pixelWidth",
+    "pkcs11",
+    "place-content",
+    "place-items",
+    "place-self",
+    "placeContent",
+    "placeItems",
+    "placeSelf",
+    "placeholder",
+    "platform",
+    "platformVersion",
+    "platforms",
+    "play",
+    "playEffect",
+    "playState",
+    "playbackRate",
+    "playbackState",
+    "playbackTime",
+    "played",
+    "playoutDelayHint",
+    "playsInline",
+    "plugins",
+    "pluginspage",
+    "pname",
+    "pointer-events",
+    "pointerBeforeReferenceNode",
+    "pointerEnabled",
+    "pointerEvents",
+    "pointerId",
+    "pointerLockElement",
+    "pointerType",
+    "points",
+    "pointsAtX",
+    "pointsAtY",
+    "pointsAtZ",
+    "polygonOffset",
+    "pop",
+    "popDebugGroup",
+    "popErrorScope",
+    "popover",
+    "popoverTargetAction",
+    "popoverTargetElement",
+    "populateMatrix",
+    "popupWindowFeatures",
+    "popupWindowName",
+    "popupWindowURI",
+    "port",
+    "port1",
+    "port2",
+    "ports",
+    "posBottom",
+    "posHeight",
+    "posLeft",
+    "posRight",
+    "posTop",
+    "posWidth",
+    "pose",
+    "position",
+    "position-anchor",
+    "position-area",
+    "positionAlign",
+    "positionAnchor",
+    "positionArea",
+    "positionTry",
+    "positionTryFallbacks",
+    "positionVisibility",
+    "positionX",
+    "positionY",
+    "positionZ",
+    "postError",
+    "postMessage",
+    "postTask",
+    "postalCode",
+    "poster",
+    "postscriptName",
+    "pow",
+    "powerEfficient",
+    "powerOff",
+    "powerPreference",
+    "preMultiplySelf",
+    "precision",
+    "preferredReflectionFormat",
+    "preferredStyleSheetSet",
+    "preferredStylesheetSet",
+    "prefix",
+    "preload",
+    "premultipliedAlpha",
+    "prepend",
+    "prerendering",
+    "presentation",
+    "presentationArea",
+    "presentationStyle",
+    "presentationTime",
+    "preserveAlpha",
+    "preserveAspectRatio",
+    "preserveAspectRatioString",
+    "preservesPitch",
+    "pressed",
+    "pressure",
+    "prevValue",
+    "preventDefault",
+    "preventExtensions",
+    "preventSilentAccess",
+    "previousElementSibling",
+    "previousNode",
+    "previousPage",
+    "previousPriority",
+    "previousRect",
+    "previousScale",
+    "previousSibling",
+    "previousTranslate",
+    "primaries",
+    "primaryKey",
+    "primaryLightDirection",
+    "primaryLightIntensity",
+    "primitive",
+    "primitiveType",
+    "primitiveUnits",
+    "principals",
+    "print",
+    "print-color-adjust",
+    "printColorAdjust",
+    "printPreview",
+    "priority",
+    "privacy",
+    "privateKey",
+    "privateToken",
+    "probablySupportsContext",
+    "probeSpace",
+    "process",
+    "processIceMessage",
+    "processLocally",
+    "processingEnd",
+    "processingStart",
+    "processorOptions",
+    "product",
+    "productId",
+    "productName",
+    "productSub",
+    "profile",
+    "profileEnd",
+    "profiles",
+    "projectionMatrix",
+    "promise",
+    "promising",
+    "prompt",
+    "properties",
+    "propertyIsEnumerable",
+    "propertyName",
+    "protectedAudience",
+    "protocol",
+    "protocolLong",
+    "prototype",
+    "provider",
+    "proxy",
+    "pseudoClass",
+    "pseudoElement",
+    "pt",
+    "publicId",
+    "publicKey",
+    "published",
+    "pulse",
+    "push",
+    "pushDebugGroup",
+    "pushErrorScope",
+    "pushManager",
+    "pushNotification",
+    "pushState",
+    "put",
+    "putImageData",
+    "px",
+    "quadraticCurveTo",
+    "qualifier",
+    "quaternion",
+    "query",
+    "queryCommandEnabled",
+    "queryCommandIndeterm",
+    "queryCommandState",
+    "queryCommandSupported",
+    "queryCommandText",
+    "queryCommandValue",
+    "queryFeatureSupport",
+    "queryLocalFonts",
+    "queryPermission",
+    "querySelector",
+    "querySelectorAll",
+    "querySet",
+    "queue",
+    "queueMicrotask",
+    "quota",
+    "quote",
+    "quotes",
+    "r",
+    "r1",
+    "r2",
+    "race",
+    "rad",
+    "radiogroup",
+    "radius",
+    "radiusX",
+    "radiusY",
+    "random",
+    "randomUUID",
+    "range",
+    "rangeCount",
+    "rangeEnd",
+    "rangeMax",
+    "rangeMin",
+    "rangeOffset",
+    "rangeOverflow",
+    "rangeParent",
+    "rangeStart",
+    "rangeUnderflow",
+    "rate",
+    "ratio",
+    "raw",
+    "rawId",
+    "rawJSON",
+    "rawValueToMeters",
+    "rcap",
+    "rch",
+    "read",
+    "readAsArrayBuffer",
+    "readAsBinaryString",
+    "readAsBlob",
+    "readAsDataURL",
+    "readAsText",
+    "readBuffer",
+    "readEntries",
+    "readOnly",
+    "readPixels",
+    "readReportRequested",
+    "readText",
+    "readValue",
+    "readable",
+    "ready",
+    "readyState",
+    "reason",
+    "reasons",
+    "reboot",
+    "receiveFeatureReport",
+    "receivedAlert",
+    "receiver",
+    "receivers",
+    "recipient",
+    "recommendedViewportScale",
+    "reconnect",
+    "recordNumber",
+    "recordsAvailable",
+    "recordset",
+    "rect",
+    "red",
+    "redEyeReduction",
+    "redirect",
+    "redirectCount",
+    "redirectEnd",
+    "redirectStart",
+    "redirected",
+    "reduce",
+    "reduceRight",
+    "reduction",
+    "refDistance",
+    "refX",
+    "refY",
+    "referenceNode",
+    "referenceSpace",
+    "referrer",
+    "referrerPolicy",
+    "refresh",
+    "region",
+    "regionAnchorX",
+    "regionAnchorY",
+    "regionId",
+    "regions",
+    "register",
+    "registerContentHandler",
+    "registerElement",
+    "registerInternalModuleStart",
+    "registerInternalModuleStop",
+    "registerProperty",
+    "registerProtocolHandler",
+    "reject",
+    "rel",
+    "relList",
+    "relatedAddress",
+    "relatedNode",
+    "relatedPort",
+    "relatedTarget",
+    "relayProtocol",
+    "release",
+    "releaseCapture",
+    "releaseEvents",
+    "releaseInterface",
+    "releaseLock",
+    "releasePointerCapture",
+    "releaseShaderCompiler",
+    "released",
+    "reliability",
+    "reliable",
+    "reliableWrite",
+    "reload",
+    "rem",
+    "remainingSpace",
+    "remote",
+    "remoteDescription",
+    "remove",
+    "removeAllRanges",
+    "removeAttribute",
+    "removeAttributeNS",
+    "removeAttributeNode",
+    "removeBehavior",
+    "removeChild",
+    "removeCue",
+    "removeEntry",
+    "removeEventListener",
+    "removeFilter",
+    "removeImport",
+    "removeItem",
+    "removeListener",
+    "removeNamedItem",
+    "removeNamedItemNS",
+    "removeNode",
+    "removeParameter",
+    "removeProperty",
+    "removeRange",
+    "removeRegion",
+    "removeRule",
+    "removeSiteSpecificTrackingException",
+    "removeSourceBuffer",
+    "removeStream",
+    "removeTrack",
+    "removeVariable",
+    "removeWakeLockListener",
+    "removeWebWideTrackingException",
+    "removed",
+    "removedNodes",
+    "renderBlockingStatus",
+    "renderHeight",
+    "renderStart",
+    "renderState",
+    "renderTime",
+    "renderWidth",
+    "renderbufferStorage",
+    "renderbufferStorageMultisample",
+    "renderedBuffer",
+    "rendererInterfaces",
+    "renderers",
+    "renderingMode",
+    "renotify",
+    "repeat",
+    "repetitionCount",
+    "replace",
+    "replaceAdjacentText",
+    "replaceAll",
+    "replaceChild",
+    "replaceChildren",
+    "replaceData",
+    "replaceId",
+    "replaceItem",
+    "replaceNode",
+    "replaceState",
+    "replaceSync",
+    "replaceTrack",
+    "replaceWholeText",
+    "replaceWith",
+    "reportError",
+    "reportEvent",
+    "reportId",
+    "reportOnly",
+    "reportValidity",
+    "request",
+    "requestAdapter",
+    "requestAdapterInfo",
+    "requestAnimationFrame",
+    "requestAutocomplete",
+    "requestClose",
+    "requestData",
+    "requestDevice",
+    "requestFrame",
+    "requestFullscreen",
+    "requestHitTestSource",
+    "requestHitTestSourceForTransientInput",
+    "requestId",
+    "requestIdleCallback",
+    "requestLightProbe",
+    "requestMIDIAccess",
+    "requestMediaKeySystemAccess",
+    "requestPermission",
+    "requestPictureInPicture",
+    "requestPointerLock",
+    "requestPort",
+    "requestPresent",
+    "requestPresenter",
+    "requestReferenceSpace",
+    "requestSession",
+    "requestStart",
+    "requestStorageAccess",
+    "requestStorageAccessFor",
+    "requestSubmit",
+    "requestTime",
+    "requestUpdateCheck",
+    "requestVideoFrameCallback",
+    "requestViewportScale",
+    "requestWindow",
+    "requested",
+    "requestingWindow",
+    "requireInteraction",
+    "required",
+    "requiredExtensions",
+    "requiredFeatures",
+    "requiredLimits",
+    "reset",
+    "resetLatency",
+    "resetPose",
+    "resetTransform",
+    "resetZoomLevel",
+    "resizable",
+    "resize",
+    "resizeBy",
+    "resizeTo",
+    "resolve",
+    "resolveQuerySet",
+    "resolveTarget",
+    "resource",
+    "respond",
+    "respondWithNewView",
+    "response",
+    "responseBody",
+    "responseEnd",
+    "responseReady",
+    "responseStart",
+    "responseStatus",
+    "responseText",
+    "responseType",
+    "responseURL",
+    "responseXML",
+    "restart",
+    "restartAfterDelay",
+    "restartIce",
+    "restore",
+    "restrictTo",
+    "result",
+    "resultIndex",
+    "resultType",
+    "results",
+    "resume",
+    "resumeDepthSensing",
+    "resumeProfilers",
+    "resumeTransformFeedback",
+    "retry",
+    "returnType",
+    "returnValue",
+    "rev",
+    "reverse",
+    "reversed",
+    "revocable",
+    "revokeObjectURL",
+    "rex",
+    "rgbColor",
+    "ric",
+    "right",
+    "rightContext",
+    "rightDegrees",
+    "rightMargin",
+    "rightProjectionMatrix",
+    "rightViewMatrix",
+    "rlh",
+    "role",
+    "rolloffFactor",
+    "root",
+    "rootBounds",
+    "rootElement",
+    "rootMargin",
+    "rotate",
+    "rotateAxisAngle",
+    "rotateAxisAngleSelf",
+    "rotateFromVector",
+    "rotateFromVectorSelf",
+    "rotateSelf",
+    "rotation",
+    "rotationAngle",
+    "rotationRate",
+    "round",
+    "roundRect",
+    "row-gap",
+    "rowGap",
+    "rowIndex",
+    "rowSpan",
+    "rows",
+    "rowsPerImage",
+    "rtcpTransport",
+    "rtt",
+    "ruby-align",
+    "ruby-position",
+    "rubyAlign",
+    "rubyOverhang",
+    "rubyPosition",
+    "rules",
+    "run",
+    "runAdAuction",
+    "runtime",
+    "runtimeStyle",
+    "rx",
+    "ry",
+    "s",
+    "safari",
+    "sameDocument",
+    "sample",
+    "sampleCount",
+    "sampleCoverage",
+    "sampleInterval",
+    "sampleRate",
+    "sampleType",
+    "sampler",
+    "samplerParameterf",
+    "samplerParameteri",
+    "sandbox",
+    "save",
+    "saveAsPDF",
+    "saveData",
+    "scale",
+    "scale3d",
+    "scale3dSelf",
+    "scaleNonUniform",
+    "scaleNonUniformSelf",
+    "scaleSelf",
+    "scheduler",
+    "scheduling",
+    "scheme",
+    "scissor",
+    "scope",
+    "scopeName",
+    "scoped",
+    "screen",
+    "screenBrightness",
+    "screenEnabled",
+    "screenLeft",
+    "screenPixelToMillimeterX",
+    "screenPixelToMillimeterY",
+    "screenState",
+    "screenTop",
+    "screenX",
+    "screenY",
+    "screens",
+    "scriptURL",
+    "scripting",
+    "scripts",
+    "scroll",
+    "scroll-behavior",
+    "scroll-margin",
+    "scroll-margin-block",
+    "scroll-margin-block-end",
+    "scroll-margin-block-start",
+    "scroll-margin-bottom",
+    "scroll-margin-inline",
+    "scroll-margin-inline-end",
+    "scroll-margin-inline-start",
+    "scroll-margin-left",
+    "scroll-margin-right",
+    "scroll-margin-top",
+    "scroll-padding",
+    "scroll-padding-block",
+    "scroll-padding-block-end",
+    "scroll-padding-block-start",
+    "scroll-padding-bottom",
+    "scroll-padding-inline",
+    "scroll-padding-inline-end",
+    "scroll-padding-inline-start",
+    "scroll-padding-left",
+    "scroll-padding-right",
+    "scroll-padding-top",
+    "scroll-snap-align",
+    "scroll-snap-stop",
+    "scroll-snap-type",
+    "scrollAmount",
+    "scrollBehavior",
+    "scrollBy",
+    "scrollByLines",
+    "scrollByPages",
+    "scrollDelay",
+    "scrollHeight",
+    "scrollIntoView",
+    "scrollIntoViewIfNeeded",
+    "scrollLeft",
+    "scrollLeftMax",
+    "scrollMargin",
+    "scrollMarginBlock",
+    "scrollMarginBlockEnd",
+    "scrollMarginBlockStart",
+    "scrollMarginBottom",
+    "scrollMarginInline",
+    "scrollMarginInlineEnd",
+    "scrollMarginInlineStart",
+    "scrollMarginLeft",
+    "scrollMarginRight",
+    "scrollMarginTop",
+    "scrollMaxX",
+    "scrollMaxY",
+    "scrollPadding",
+    "scrollPaddingBlock",
+    "scrollPaddingBlockEnd",
+    "scrollPaddingBlockStart",
+    "scrollPaddingBottom",
+    "scrollPaddingInline",
+    "scrollPaddingInlineEnd",
+    "scrollPaddingInlineStart",
+    "scrollPaddingLeft",
+    "scrollPaddingRight",
+    "scrollPaddingTop",
+    "scrollRestoration",
+    "scrollSnapAlign",
+    "scrollSnapStop",
+    "scrollSnapType",
+    "scrollTo",
+    "scrollTop",
+    "scrollTopMax",
+    "scrollWidth",
+    "scrollX",
+    "scrollY",
+    "scrollbar-color",
+    "scrollbar-gutter",
+    "scrollbar-width",
+    "scrollbar3dLightColor",
+    "scrollbarArrowColor",
+    "scrollbarBaseColor",
+    "scrollbarColor",
+    "scrollbarDarkShadowColor",
+    "scrollbarFaceColor",
+    "scrollbarGutter",
+    "scrollbarHighlightColor",
+    "scrollbarShadowColor",
+    "scrollbarTrackColor",
+    "scrollbarWidth",
+    "scrollbars",
+    "scrolling",
+    "scrollingElement",
+    "sctp",
+    "sctpCauseCode",
+    "sdp",
+    "sdpLineNumber",
+    "sdpMLineIndex",
+    "sdpMid",
+    "seal",
+    "search",
+    "searchBox",
+    "searchBoxJavaBridge_",
+    "searchParams",
+    "second",
+    "seconds",
+    "sectionRowIndex",
+    "secureConnectionStart",
+    "securePaymentConfirmationAvailability",
+    "security",
+    "seed",
+    "seek",
+    "seekToNextFrame",
+    "seekable",
+    "seeking",
+    "segments",
+    "select",
+    "selectAllChildren",
+    "selectAlternateInterface",
+    "selectAudioOutput",
+    "selectConfiguration",
+    "selectNode",
+    "selectNodeContents",
+    "selectNodes",
+    "selectSingleNode",
+    "selectSubString",
+    "selectURL",
+    "selected",
+    "selectedIndex",
+    "selectedOptions",
+    "selectedStyleSheetSet",
+    "selectedStylesheetSet",
+    "selectedTrack",
+    "selection",
+    "selectionDirection",
+    "selectionEnd",
+    "selectionStart",
+    "selector",
+    "selectorText",
+    "self",
+    "send",
+    "sendAsBinary",
+    "sendBeacon",
+    "sendFeatureReport",
+    "sendMessage",
+    "sendNativeMessage",
+    "sendOrder",
+    "sendReport",
+    "sender",
+    "sentAlert",
+    "sentTimestamp",
+    "separator",
+    "serial",
+    "serialNumber",
+    "serializable",
+    "serializeToString",
+    "serverTiming",
+    "service",
+    "serviceWorker",
+    "session",
+    "sessionId",
+    "sessionStorage",
+    "sessions",
+    "set",
+    "setActionHandler",
+    "setActive",
+    "setAlpha",
+    "setAppBadge",
+    "setAttribute",
+    "setAttributeNS",
+    "setAttributeNode",
+    "setAttributeNodeNS",
+    "setAttributionReporting",
+    "setBadgeBackgroundColor",
+    "setBadgeText",
+    "setBadgeTextColor",
+    "setBaseAndExtent",
+    "setBigInt64",
+    "setBigUint64",
+    "setBindGroup",
+    "setBingCurrentSearchDefault",
+    "setBlendConstant",
+    "setCameraActive",
+    "setCapture",
+    "setCaptureHandleConfig",
+    "setCodecPreferences",
+    "setColor",
+    "setCompositeOperation",
+    "setConfiguration",
+    "setConsumer",
+    "setCurrentTime",
+    "setCustomValidity",
+    "setData",
+    "setDate",
+    "setDragImage",
+    "setEnabled",
+    "setEnd",
+    "setEndAfter",
+    "setEndBefore",
+    "setEndPoint",
+    "setExpires",
+    "setFillColor",
+    "setFilterRes",
+    "setFloat16",
+    "setFloat32",
+    "setFloat64",
+    "setFloatValue",
+    "setFocusBehavior",
+    "setFormValue",
+    "setFromBase64",
+    "setFromHex",
+    "setFullYear",
+    "setHTMLUnsafe",
+    "setHeaderExtensionsToNegotiate",
+    "setHeaderValue",
+    "setHours",
+    "setIcon",
+    "setIdentityProvider",
+    "setImmediate",
+    "setIndexBuffer",
+    "setInt16",
+    "setInt32",
+    "setInt8",
+    "setInterval",
+    "setItem",
+    "setKeyframes",
+    "setLineCap",
+    "setLineDash",
+    "setLineJoin",
+    "setLineWidth",
+    "setLiveSeekableRange",
+    "setLocalDescription",
+    "setMatrix",
+    "setMatrixValue",
+    "setMediaKeys",
+    "setMicrophoneActive",
+    "setMilliseconds",
+    "setMinutes",
+    "setMiterLimit",
+    "setMonth",
+    "setNamedItem",
+    "setNamedItemNS",
+    "setNonUserCodeExceptions",
+    "setOrientToAngle",
+    "setOrientToAuto",
+    "setOrientation",
+    "setOverrideHistoryNavigationMode",
+    "setPaint",
+    "setParameter",
+    "setParameters",
+    "setPathData",
+    "setPeriodicWave",
+    "setPipeline",
+    "setPointerCapture",
+    "setPopup",
+    "setPosition",
+    "setPositionState",
+    "setPreference",
+    "setPriority",
+    "setPrivateToken",
+    "setProperty",
+    "setPrototypeOf",
+    "setRGBColor",
+    "setRGBColorICCColor",
+    "setRadius",
+    "setRangeText",
+    "setRemoteDescription",
+    "setReportEventDataForAutomaticBeacons",
+    "setRequestHeader",
+    "setResizable",
+    "setResourceTimingBufferSize",
+    "setRotate",
+    "setScale",
+    "setScissorRect",
+    "setSeconds",
+    "setSelectionRange",
+    "setServerCertificate",
+    "setShadow",
+    "setSharedStorageContext",
+    "setSignals",
+    "setSinkId",
+    "setSkewX",
+    "setSkewY",
+    "setStart",
+    "setStartAfter",
+    "setStartBefore",
+    "setStatus",
+    "setStdDeviation",
+    "setStencilReference",
+    "setStreams",
+    "setStrictMode",
+    "setStringValue",
+    "setStrokeColor",
+    "setSuggestResult",
+    "setTargetAtTime",
+    "setTargetValueAtTime",
+    "setTime",
+    "setTimeout",
+    "setTitle",
+    "setTransform",
+    "setTranslate",
+    "setUTCDate",
+    "setUTCFullYear",
+    "setUTCHours",
+    "setUTCMilliseconds",
+    "setUTCMinutes",
+    "setUTCMonth",
+    "setUTCSeconds",
+    "setUint16",
+    "setUint32",
+    "setUint8",
+    "setUninstallURL",
+    "setUpdateUrlData",
+    "setUri",
+    "setValidity",
+    "setValueAtTime",
+    "setValueCurveAtTime",
+    "setVariable",
+    "setVelocity",
+    "setVersion",
+    "setVertexBuffer",
+    "setViewport",
+    "setYear",
+    "setZoom",
+    "setZoomSettings",
+    "settingName",
+    "settingValue",
+    "sex",
+    "shaderLocation",
+    "shaderSource",
+    "shadowBlur",
+    "shadowColor",
+    "shadowOffsetX",
+    "shadowOffsetY",
+    "shadowRoot",
+    "shadowRootClonable",
+    "shadowRootDelegatesFocus",
+    "shadowRootMode",
+    "shadowRootSerializable",
+    "shape",
+    "shape-image-threshold",
+    "shape-margin",
+    "shape-outside",
+    "shape-rendering",
+    "shapeImageThreshold",
+    "shapeMargin",
+    "shapeOutside",
+    "shapeRendering",
+    "share",
+    "sharedContext",
+    "sharedStorage",
+    "sharedStorageWritable",
+    "sheet",
+    "shift",
+    "shiftKey",
+    "shiftLeft",
+    "shippingAddress",
+    "shippingOption",
+    "shippingType",
+    "show",
+    "showDirectoryPicker",
+    "showHelp",
+    "showModal",
+    "showModalDialog",
+    "showModelessDialog",
+    "showNotification",
+    "showOpenFilePicker",
+    "showPicker",
+    "showPopover",
+    "showSaveFilePicker",
+    "sidebar",
+    "sidebarAction",
+    "sign",
+    "signal",
+    "signalAllAcceptedCredentials",
+    "signalCurrentUserDetails",
+    "signalUnknownCredential",
+    "signalingState",
+    "signature",
+    "silent",
+    "sin",
+    "singleNodeValue",
+    "sinh",
+    "sinkId",
+    "sittingToStandingTransform",
+    "size",
+    "sizeAdjust",
+    "sizeToContent",
+    "sizeX",
+    "sizeZ",
+    "sizes",
+    "skewX",
+    "skewXSelf",
+    "skewY",
+    "skewYSelf",
+    "skipTransition",
+    "skipped",
+    "slice",
+    "slope",
+    "slot",
+    "slotAssignment",
+    "small",
+    "smil",
+    "smooth",
+    "smoothingTimeConstant",
+    "snapTargetBlock",
+    "snapTargetInline",
+    "snapToLines",
+    "snapshotItem",
+    "snapshotLength",
+    "some",
+    "sort",
+    "sortingCode",
+    "source",
+    "sourceBuffer",
+    "sourceBuffers",
+    "sourceCapabilities",
+    "sourceCharPosition",
+    "sourceElement",
+    "sourceFile",
+    "sourceFunctionName",
+    "sourceIndex",
+    "sourceLanguage",
+    "sourceMap",
+    "sourceURL",
+    "sources",
+    "spacing",
+    "span",
+    "speak",
+    "speakAs",
+    "speaking",
+    "species",
+    "specified",
+    "specularConstant",
+    "specularExponent",
+    "speechSynthesis",
+    "speed",
+    "speedOfSound",
+    "spellcheck",
+    "sphericalHarmonicsCoefficients",
+    "splice",
+    "split",
+    "splitText",
+    "spreadMethod",
+    "sqrt",
+    "src",
+    "srcElement",
+    "srcFactor",
+    "srcFilter",
+    "srcObject",
+    "srcUrn",
+    "srcdoc",
+    "srclang",
+    "srcset",
+    "stack",
+    "stackTraceLimit",
+    "stacktrace",
+    "stageParameters",
+    "standalone",
+    "standby",
+    "start",
+    "startContainer",
+    "startE",
+    "startIce",
+    "startLoadTime",
+    "startMessages",
+    "startNotifications",
+    "startOffset",
+    "startProfiling",
+    "startRendering",
+    "startShark",
+    "startTime",
+    "startViewTransition",
+    "startsWith",
+    "state",
+    "states",
+    "stats",
+    "status",
+    "statusCode",
+    "statusMessage",
+    "statusText",
+    "statusbar",
+    "stdDeviationX",
+    "stdDeviationY",
+    "stencilBack",
+    "stencilClearValue",
+    "stencilFront",
+    "stencilFunc",
+    "stencilFuncSeparate",
+    "stencilLoadOp",
+    "stencilMask",
+    "stencilMaskSeparate",
+    "stencilOp",
+    "stencilOpSeparate",
+    "stencilReadMask",
+    "stencilReadOnly",
+    "stencilStoreOp",
+    "stencilWriteMask",
+    "step",
+    "stepDown",
+    "stepMismatch",
+    "stepMode",
+    "stepUp",
+    "sticky",
+    "stitchTiles",
+    "stop",
+    "stop-color",
+    "stop-opacity",
+    "stopColor",
+    "stopImmediatePropagation",
+    "stopNotifications",
+    "stopOpacity",
+    "stopProfiling",
+    "stopPropagation",
+    "stopShark",
+    "stopped",
+    "storage",
+    "storageArea",
+    "storageBuckets",
+    "storageName",
+    "storageStatus",
+    "storageTexture",
+    "store",
+    "storeOp",
+    "storeSiteSpecificTrackingException",
+    "storeWebWideTrackingException",
+    "stpVersion",
+    "stream",
+    "streamErrorCode",
+    "streams",
+    "stretch",
+    "strike",
+    "string",
+    "stringValue",
+    "stringify",
+    "stripIndexFormat",
+    "stroke",
+    "stroke-dasharray",
+    "stroke-dashoffset",
+    "stroke-linecap",
+    "stroke-linejoin",
+    "stroke-miterlimit",
+    "stroke-opacity",
+    "stroke-width",
+    "strokeDasharray",
+    "strokeDashoffset",
+    "strokeLinecap",
+    "strokeLinejoin",
+    "strokeMiterlimit",
+    "strokeOpacity",
+    "strokeRect",
+    "strokeStyle",
+    "strokeText",
+    "strokeWidth",
+    "structuredClone",
+    "style",
+    "styleAndLayoutStart",
+    "styleFloat",
+    "styleMap",
+    "styleMedia",
+    "styleSheet",
+    "styleSheetSets",
+    "styleSheets",
+    "styleset",
+    "stylistic",
+    "sub",
+    "subarray",
+    "subgroupMaxSize",
+    "subgroupMinSize",
+    "subject",
+    "submit",
+    "submitFrame",
+    "submitter",
+    "subscribe",
+    "substr",
+    "substring",
+    "substringData",
+    "subtle",
+    "subtree",
+    "suffix",
+    "suffixes",
+    "sumPrecise",
+    "summarize",
+    "summarizeStreaming",
+    "summary",
+    "sup",
+    "supported",
+    "supportedContentEncodings",
+    "supportedEntryTypes",
+    "supportedValuesOf",
+    "supports",
+    "supportsFiber",
+    "supportsSession",
+    "supportsText",
+    "suppressed",
+    "surfaceScale",
+    "surroundContents",
+    "suspend",
+    "suspendRedraw",
+    "svb",
+    "svh",
+    "svi",
+    "svmax",
+    "svmin",
+    "svw",
+    "swapCache",
+    "swapNode",
+    "swash",
+    "sweepFlag",
+    "switchMap",
+    "symbols",
+    "symmetricDifference",
+    "sync",
+    "syntax",
+    "sysexEnabled",
+    "system",
+    "systemCode",
+    "systemId",
+    "systemLanguage",
+    "systemXDPI",
+    "systemYDPI",
+    "tBodies",
+    "tFoot",
+    "tHead",
+    "tab",
+    "tab-size",
+    "tabId",
+    "tabIds",
+    "tabIndex",
+    "tabSize",
+    "table",
+    "table-layout",
+    "tableLayout",
+    "tableValues",
+    "tabs",
+    "tag",
+    "tagName",
+    "tagUrn",
+    "tags",
+    "taintEnabled",
+    "take",
+    "takePhoto",
+    "takeRecords",
+    "takeUntil",
+    "tan",
+    "tangentialPressure",
+    "tanh",
+    "target",
+    "targetAddressSpace",
+    "targetElement",
+    "targetLanguage",
+    "targetRayMode",
+    "targetRaySpace",
+    "targetTouches",
+    "targetURL",
+    "targetX",
+    "targetY",
+    "targets",
+    "tcpType",
+    "tee",
+    "tel",
+    "telemetry",
+    "terminate",
+    "test",
+    "texImage2D",
+    "texImage3D",
+    "texParameterf",
+    "texParameteri",
+    "texStorage2D",
+    "texStorage3D",
+    "texSubImage2D",
+    "texSubImage3D",
+    "text",
+    "text-align",
+    "text-align-last",
+    "text-anchor",
+    "text-combine-upright",
+    "text-decoration",
+    "text-decoration-color",
+    "text-decoration-line",
+    "text-decoration-skip-ink",
+    "text-decoration-style",
+    "text-decoration-thickness",
+    "text-emphasis",
+    "text-emphasis-color",
+    "text-emphasis-position",
+    "text-emphasis-style",
+    "text-indent",
+    "text-justify",
+    "text-orientation",
+    "text-overflow",
+    "text-rendering",
+    "text-shadow",
+    "text-transform",
+    "text-underline-offset",
+    "text-underline-position",
+    "text-wrap",
+    "text-wrap-mode",
+    "text-wrap-style",
+    "textAlign",
+    "textAlignLast",
+    "textAnchor",
+    "textAutospace",
+    "textBaseline",
+    "textCombineUpright",
+    "textContent",
+    "textDecoration",
+    "textDecorationBlink",
+    "textDecorationColor",
+    "textDecorationInset",
+    "textDecorationLine",
+    "textDecorationLineThrough",
+    "textDecorationNone",
+    "textDecorationOverline",
+    "textDecorationSkipInk",
+    "textDecorationStyle",
+    "textDecorationThickness",
+    "textDecorationUnderline",
+    "textEmphasis",
+    "textEmphasisColor",
+    "textEmphasisPosition",
+    "textEmphasisStyle",
+    "textIndent",
+    "textJustify",
+    "textJustifyTrim",
+    "textKashida",
+    "textKashidaSpace",
+    "textLength",
+    "textOrientation",
+    "textOverflow",
+    "textRendering",
+    "textShadow",
+    "textTracks",
+    "textTransform",
+    "textUnderlineOffset",
+    "textUnderlinePosition",
+    "textWrap",
+    "textWrapMode",
+    "textWrapStyle",
+    "texture",
+    "theme",
+    "then",
+    "threadId",
+    "threshold",
+    "thresholds",
+    "throwIfAborted",
+    "tiltX",
+    "tiltY",
+    "time",
+    "timeEnd",
+    "timeLog",
+    "timeOrigin",
+    "timeRemaining",
+    "timeStamp",
+    "timeStyle",
+    "timeZone",
+    "timeZoneName",
+    "timecode",
+    "timeline",
+    "timelineTime",
+    "timeout",
+    "timestamp",
+    "timestampOffset",
+    "timestampWrites",
+    "timing",
+    "title",
+    "titlebarAreaRect",
+    "tlsChannelId",
+    "to",
+    "toArray",
+    "toBase64",
+    "toBlob",
+    "toDataURL",
+    "toDateString",
+    "toElement",
+    "toExponential",
+    "toFixed",
+    "toFloat32Array",
+    "toFloat64Array",
+    "toGMTString",
+    "toHex",
+    "toISOString",
+    "toJSON",
+    "toLocaleDateString",
+    "toLocaleFormat",
+    "toLocaleLowerCase",
+    "toLocaleString",
+    "toLocaleTimeString",
+    "toLocaleUpperCase",
+    "toLowerCase",
+    "toMatrix",
+    "toMethod",
+    "toPrecision",
+    "toPrimitive",
+    "toReversed",
+    "toSdp",
+    "toSorted",
+    "toSource",
+    "toSpliced",
+    "toStaticHTML",
+    "toString",
+    "toStringTag",
+    "toSum",
+    "toTemporalInstant",
+    "toTimeString",
+    "toUTCString",
+    "toUpperCase",
+    "toWellFormed",
+    "toggle",
+    "toggleAttribute",
+    "toggleLongPressEnabled",
+    "togglePopover",
+    "toggleReaderMode",
+    "token",
+    "tone",
+    "toneBuffer",
+    "tooLong",
+    "tooShort",
+    "toolbar",
+    "top",
+    "topMargin",
+    "topSites",
+    "topology",
+    "total",
+    "totalFrameDelay",
+    "totalFrames",
+    "totalFramesDuration",
+    "totalVideoFrames",
+    "touch-action",
+    "touchAction",
+    "touched",
+    "touches",
+    "trace",
+    "track",
+    "trackVisibility",
+    "trackedAnchors",
+    "tracks",
+    "tran",
+    "transaction",
+    "transactions",
+    "transceiver",
+    "transfer",
+    "transferControlToOffscreen",
+    "transferFromImageBitmap",
+    "transferImageBitmap",
+    "transferIn",
+    "transferOut",
+    "transferSize",
+    "transferToFixedLength",
+    "transferToImageBitmap",
+    "transform",
+    "transform-box",
+    "transform-origin",
+    "transform-style",
+    "transformBox",
+    "transformFeedbackVaryings",
+    "transformOrigin",
+    "transformPoint",
+    "transformString",
+    "transformStyle",
+    "transformToDocument",
+    "transformToFragment",
+    "transition",
+    "transition-behavior",
+    "transition-delay",
+    "transition-duration",
+    "transition-property",
+    "transition-timing-function",
+    "transitionBehavior",
+    "transitionDelay",
+    "transitionDuration",
+    "transitionProperty",
+    "transitionTimingFunction",
+    "translate",
+    "translateSelf",
+    "translateStreaming",
+    "translationX",
+    "translationY",
+    "transport",
+    "traverseTo",
+    "trim",
+    "trimEnd",
+    "trimLeft",
+    "trimRight",
+    "trimStart",
+    "trueSpeed",
+    "trunc",
+    "truncate",
+    "trustedTypes",
+    "try",
+    "turn",
+    "twist",
+    "type",
+    "typeDetail",
+    "typeMismatch",
+    "typeMustMatch",
+    "types",
+    "u2f",
+    "ubound",
+    "uint16",
+    "uint32",
+    "uint8",
+    "uint8Clamped",
+    "unadjustedMovement",
+    "unclippedDepth",
+    "unconfigure",
+    "undefined",
+    "underlineStyle",
+    "underlineThickness",
+    "unescape",
+    "uneval",
+    "ungroup",
+    "unicode",
+    "unicode-bidi",
+    "unicodeBidi",
+    "unicodeRange",
+    "unicodeSets",
+    "uniform1f",
+    "uniform1fv",
+    "uniform1i",
+    "uniform1iv",
+    "uniform1ui",
+    "uniform1uiv",
+    "uniform2f",
+    "uniform2fv",
+    "uniform2i",
+    "uniform2iv",
+    "uniform2ui",
+    "uniform2uiv",
+    "uniform3f",
+    "uniform3fv",
+    "uniform3i",
+    "uniform3iv",
+    "uniform3ui",
+    "uniform3uiv",
+    "uniform4f",
+    "uniform4fv",
+    "uniform4i",
+    "uniform4iv",
+    "uniform4ui",
+    "uniform4uiv",
+    "uniformBlockBinding",
+    "uniformMatrix2fv",
+    "uniformMatrix2x3fv",
+    "uniformMatrix2x4fv",
+    "uniformMatrix3fv",
+    "uniformMatrix3x2fv",
+    "uniformMatrix3x4fv",
+    "uniformMatrix4fv",
+    "uniformMatrix4x2fv",
+    "uniformMatrix4x3fv",
+    "uninstallSelf",
+    "union",
+    "unique",
+    "uniqueID",
+    "uniqueNumber",
+    "unit",
+    "unitType",
+    "units",
+    "unloadEventEnd",
+    "unloadEventStart",
+    "unlock",
+    "unmap",
+    "unmount",
+    "unobserve",
+    "unpackColorSpace",
+    "unpause",
+    "unpauseAnimations",
+    "unreadCount",
+    "unregister",
+    "unregisterContentHandler",
+    "unregisterProtocolHandler",
+    "unscopables",
+    "unselectable",
+    "unshift",
+    "unsubscribe",
+    "unsuspendRedraw",
+    "unsuspendRedrawAll",
+    "unwatch",
+    "unwrapKey",
+    "upDegrees",
+    "upX",
+    "upY",
+    "upZ",
+    "update",
+    "updateAdInterestGroups",
+    "updateCallbackDone",
+    "updateCharacterBounds",
+    "updateCommands",
+    "updateControlBounds",
+    "updateCurrentEntry",
+    "updateIce",
+    "updateInkTrailStartPoint",
+    "updateInterval",
+    "updatePlaybackRate",
+    "updateRangeEnd",
+    "updateRangeStart",
+    "updateRenderState",
+    "updateSelection",
+    "updateSelectionBounds",
+    "updateSettings",
+    "updateText",
+    "updateTiming",
+    "updateViaCache",
+    "updateWith",
+    "updated",
+    "updating",
+    "upgrade",
+    "upload",
+    "uploadTotal",
+    "uploaded",
+    "upper",
+    "upperBound",
+    "upperOpen",
+    "uri",
+    "url",
+    "urn",
+    "urns",
+    "usage",
+    "usages",
+    "usb",
+    "usbVersionMajor",
+    "usbVersionMinor",
+    "usbVersionSubminor",
+    "use",
+    "useCurrentView",
+    "useMap",
+    "useProgram",
+    "usedSpace",
+    "user-select",
+    "userActivation",
+    "userAgent",
+    "userAgentAllowsProtocol",
+    "userAgentData",
+    "userChoice",
+    "userHandle",
+    "userHint",
+    "userInitiated",
+    "userLanguage",
+    "userSelect",
+    "userState",
+    "userVisibleOnly",
+    "username",
+    "usernameFragment",
+    "utterance",
+    "uuid",
+    "v8BreakIterator",
+    "vAlign",
+    "vLink",
+    "valid",
+    "validate",
+    "validateProgram",
+    "validationMessage",
+    "validity",
+    "value",
+    "valueAsDate",
+    "valueAsNumber",
+    "valueAsString",
+    "valueInSpecifiedUnits",
+    "valueMissing",
+    "valueOf",
+    "valueText",
+    "valueType",
+    "values",
+    "variable",
+    "variant",
+    "variationSettings",
+    "vb",
+    "vector-effect",
+    "vectorEffect",
+    "velocityAngular",
+    "velocityExpansion",
+    "velocityX",
+    "velocityY",
+    "vendor",
+    "vendorId",
+    "vendorSub",
+    "verify",
+    "version",
+    "vertex",
+    "vertexAttrib1f",
+    "vertexAttrib1fv",
+    "vertexAttrib2f",
+    "vertexAttrib2fv",
+    "vertexAttrib3f",
+    "vertexAttrib3fv",
+    "vertexAttrib4f",
+    "vertexAttrib4fv",
+    "vertexAttribDivisor",
+    "vertexAttribDivisorANGLE",
+    "vertexAttribI4i",
+    "vertexAttribI4iv",
+    "vertexAttribI4ui",
+    "vertexAttribI4uiv",
+    "vertexAttribIPointer",
+    "vertexAttribPointer",
+    "vertical",
+    "vertical-align",
+    "verticalAlign",
+    "verticalOverflow",
+    "vh",
+    "vi",
+    "vibrate",
+    "vibrationActuator",
+    "videoBitsPerSecond",
+    "videoHeight",
+    "videoTracks",
+    "videoWidth",
+    "view",
+    "viewBox",
+    "viewBoxString",
+    "viewDimension",
+    "viewFormats",
+    "viewTarget",
+    "viewTargetString",
+    "viewTransition",
+    "viewTransitionClass",
+    "viewTransitionName",
+    "viewport",
+    "viewportAnchorX",
+    "viewportAnchorY",
+    "viewportElement",
+    "views",
+    "violatedDirective",
+    "virtualKeyboard",
+    "virtualKeyboardPolicy",
+    "visibility",
+    "visibilityState",
+    "visible",
+    "visibleRect",
+    "visualViewport",
+    "vlinkColor",
+    "vmax",
+    "vmin",
+    "voice",
+    "voiceURI",
+    "volume",
+    "vrml",
+    "vspace",
+    "vw",
+    "w",
+    "wait",
+    "waitAsync",
+    "waitSync",
+    "waiting",
+    "wake",
+    "wakeLock",
+    "wand",
+    "warmup",
+    "warn",
+    "wasAlternateProtocolAvailable",
+    "wasClean",
+    "wasDiscarded",
+    "wasFetchedViaSpdy",
+    "wasNpnNegotiated",
+    "watch",
+    "watchAvailability",
+    "watchPosition",
+    "webNavigation",
+    "webRequest",
+    "webdriver",
+    "webkitAddKey",
+    "webkitAlignContent",
+    "webkitAlignItems",
+    "webkitAlignSelf",
+    "webkitAnimation",
+    "webkitAnimationDelay",
+    "webkitAnimationDirection",
+    "webkitAnimationDuration",
+    "webkitAnimationFillMode",
+    "webkitAnimationIterationCount",
+    "webkitAnimationName",
+    "webkitAnimationPlayState",
+    "webkitAnimationTimingFunction",
+    "webkitAppearance",
+    "webkitAudioContext",
+    "webkitAudioDecodedByteCount",
+    "webkitAudioPannerNode",
+    "webkitBackfaceVisibility",
+    "webkitBackground",
+    "webkitBackgroundAttachment",
+    "webkitBackgroundClip",
+    "webkitBackgroundColor",
+    "webkitBackgroundImage",
+    "webkitBackgroundOrigin",
+    "webkitBackgroundPosition",
+    "webkitBackgroundPositionX",
+    "webkitBackgroundPositionY",
+    "webkitBackgroundRepeat",
+    "webkitBackgroundSize",
+    "webkitBackingStorePixelRatio",
+    "webkitBorderBottomLeftRadius",
+    "webkitBorderBottomRightRadius",
+    "webkitBorderImage",
+    "webkitBorderImageOutset",
+    "webkitBorderImageRepeat",
+    "webkitBorderImageSlice",
+    "webkitBorderImageSource",
+    "webkitBorderImageWidth",
+    "webkitBorderRadius",
+    "webkitBorderTopLeftRadius",
+    "webkitBorderTopRightRadius",
+    "webkitBoxAlign",
+    "webkitBoxDirection",
+    "webkitBoxFlex",
+    "webkitBoxOrdinalGroup",
+    "webkitBoxOrient",
+    "webkitBoxPack",
+    "webkitBoxShadow",
+    "webkitBoxSizing",
+    "webkitCancelAnimationFrame",
+    "webkitCancelFullScreen",
+    "webkitCancelKeyRequest",
+    "webkitCancelRequestAnimationFrame",
+    "webkitClearResourceTimings",
+    "webkitClipPath",
+    "webkitClosedCaptionsVisible",
+    "webkitConvertPointFromNodeToPage",
+    "webkitConvertPointFromPageToNode",
+    "webkitCreateShadowRoot",
+    "webkitCurrentFullScreenElement",
+    "webkitCurrentPlaybackTargetIsWireless",
+    "webkitDecodedFrameCount",
+    "webkitDirectionInvertedFromDevice",
+    "webkitDisplayingFullscreen",
+    "webkitDroppedFrameCount",
+    "webkitEnterFullScreen",
+    "webkitEnterFullscreen",
+    "webkitEntries",
+    "webkitExitFullScreen",
+    "webkitExitFullscreen",
+    "webkitExitPointerLock",
+    "webkitFilter",
+    "webkitFlex",
+    "webkitFlexBasis",
+    "webkitFlexDirection",
+    "webkitFlexFlow",
+    "webkitFlexGrow",
+    "webkitFlexShrink",
+    "webkitFlexWrap",
+    "webkitFontFeatureSettings",
+    "webkitFullScreenKeyboardInputAllowed",
+    "webkitFullscreenElement",
+    "webkitFullscreenEnabled",
+    "webkitGenerateKeyRequest",
+    "webkitGetAsEntry",
+    "webkitGetDatabaseNames",
+    "webkitGetEntries",
+    "webkitGetEntriesByName",
+    "webkitGetEntriesByType",
+    "webkitGetFlowByName",
+    "webkitGetGamepads",
+    "webkitGetImageDataHD",
+    "webkitGetNamedFlows",
+    "webkitGetRegionFlowRanges",
+    "webkitGetUserMedia",
+    "webkitHasClosedCaptions",
+    "webkitHidden",
+    "webkitIDBCursor",
+    "webkitIDBDatabase",
+    "webkitIDBDatabaseError",
+    "webkitIDBDatabaseException",
+    "webkitIDBFactory",
+    "webkitIDBIndex",
+    "webkitIDBKeyRange",
+    "webkitIDBObjectStore",
+    "webkitIDBRequest",
+    "webkitIDBTransaction",
+    "webkitImageSmoothingEnabled",
+    "webkitIndexedDB",
+    "webkitInitMessageEvent",
+    "webkitIsFullScreen",
+    "webkitJustifyContent",
+    "webkitKeys",
+    "webkitLineClamp",
+    "webkitLineDashOffset",
+    "webkitLockOrientation",
+    "webkitMask",
+    "webkitMaskClip",
+    "webkitMaskComposite",
+    "webkitMaskImage",
+    "webkitMaskOrigin",
+    "webkitMaskPosition",
+    "webkitMaskPositionX",
+    "webkitMaskPositionY",
+    "webkitMaskRepeat",
+    "webkitMaskSize",
+    "webkitMatchesSelector",
+    "webkitMediaStream",
+    "webkitNotifications",
+    "webkitOfflineAudioContext",
+    "webkitOrder",
+    "webkitOrientation",
+    "webkitPeerConnection00",
+    "webkitPersistentStorage",
+    "webkitPerspective",
+    "webkitPerspectiveOrigin",
+    "webkitPointerLockElement",
+    "webkitPostMessage",
+    "webkitPreservesPitch",
+    "webkitPutImageDataHD",
+    "webkitRTCPeerConnection",
+    "webkitRegionOverset",
+    "webkitRelativePath",
+    "webkitRequestAnimationFrame",
+    "webkitRequestFileSystem",
+    "webkitRequestFullScreen",
+    "webkitRequestFullscreen",
+    "webkitRequestPointerLock",
+    "webkitResolveLocalFileSystemURL",
+    "webkitSetMediaKeys",
+    "webkitSetResourceTimingBufferSize",
+    "webkitShadowRoot",
+    "webkitShowPlaybackTargetPicker",
+    "webkitSlice",
+    "webkitSpeechGrammar",
+    "webkitSpeechGrammarList",
+    "webkitSpeechRecognition",
+    "webkitSpeechRecognitionError",
+    "webkitSpeechRecognitionEvent",
+    "webkitStorageInfo",
+    "webkitSupportsFullscreen",
+    "webkitTemporaryStorage",
+    "webkitTextFillColor",
+    "webkitTextSecurity",
+    "webkitTextSizeAdjust",
+    "webkitTextStroke",
+    "webkitTextStrokeColor",
+    "webkitTextStrokeWidth",
+    "webkitTransform",
+    "webkitTransformOrigin",
+    "webkitTransformStyle",
+    "webkitTransition",
+    "webkitTransitionDelay",
+    "webkitTransitionDuration",
+    "webkitTransitionProperty",
+    "webkitTransitionTimingFunction",
+    "webkitURL",
+    "webkitUnlockOrientation",
+    "webkitUserSelect",
+    "webkitVideoDecodedByteCount",
+    "webkitVisibilityState",
+    "webkitWirelessVideoPlaybackDisabled",
+    "webkitdirectory",
+    "webkitdropzone",
+    "webstore",
+    "weekday",
+    "weeks",
+    "weight",
+    "wgslLanguageFeatures",
+    "whatToShow",
+    "wheelDelta",
+    "wheelDeltaX",
+    "wheelDeltaY",
+    "when",
+    "whenDefined",
+    "which",
+    "white-space",
+    "white-space-collapse",
+    "whiteSpace",
+    "whiteSpaceCollapse",
+    "wholeText",
+    "widows",
+    "width",
+    "will-change",
+    "willChange",
+    "willValidate",
+    "window",
+    "windowAttribution",
+    "windowControlsOverlay",
+    "windowId",
+    "windowIds",
+    "windows",
+    "with",
+    "withCredentials",
+    "withResolvers",
+    "word-break",
+    "word-spacing",
+    "word-wrap",
+    "wordBreak",
+    "wordSpacing",
+    "wordWrap",
+    "workerCacheLookupStart",
+    "workerFinalSourceType",
+    "workerMatchedSourceType",
+    "workerRouterEvaluationStart",
+    "workerStart",
+    "worklet",
+    "wow64",
+    "wrap",
+    "wrapKey",
+    "writable",
+    "writableAuxiliaries",
+    "write",
+    "writeBuffer",
+    "writeMask",
+    "writeText",
+    "writeTexture",
+    "writeTimestamp",
+    "writeValue",
+    "writeValueWithResponse",
+    "writeValueWithoutResponse",
+    "writeWithoutResponse",
+    "writeln",
+    "writing-mode",
+    "writingMode",
+    "writingSuggestions",
+    "x",
+    "x1",
+    "x2",
+    "xChannelSelector",
+    "xmlEncoding",
+    "xmlStandalone",
+    "xmlVersion",
+    "xmlbase",
+    "xmllang",
+    "xmlspace",
+    "xor",
+    "xr",
+    "y",
+    "y1",
+    "y2",
+    "yChannelSelector",
+    "yandex",
+    "year",
+    "years",
+    "yield",
+    "z",
+    "z-index",
+    "zIndex",
+    "zoom",
+    "zoomAndPan",
+    "zoomLevel",
+    "zoomRectScreen",
+];
+
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+function find_builtins(reserved) {
+    domprops.forEach(add);
+
+    // Compatibility fix for some standard defined globals not defined on every js environment
+    var new_globals = ["Symbol", "Map", "Promise", "Proxy", "Reflect", "Set", "WeakMap", "WeakSet"];
+    var objects = {};
+    var global_ref = typeof global === "object" ? global : self;
+
+    new_globals.forEach(function (new_global) {
+        objects[new_global] = global_ref[new_global] || function() {};
+    });
+
+    [
+        "null",
+        "true",
+        "false",
+        "NaN",
+        "Infinity",
+        "-Infinity",
+        "undefined",
+    ].forEach(add);
+    [ Object, Array, Function, Number,
+      String, Boolean, Error, Math,
+      Date, RegExp, objects.Symbol, ArrayBuffer,
+      DataView, decodeURI, decodeURIComponent,
+      encodeURI, encodeURIComponent, eval, EvalError,
+      Float32Array, Float64Array, Int8Array, Int16Array,
+      Int32Array, isFinite, isNaN, JSON, objects.Map, parseFloat,
+      parseInt, objects.Promise, objects.Proxy, RangeError, ReferenceError,
+      objects.Reflect, objects.Set, SyntaxError, TypeError, Uint8Array,
+      Uint8ClampedArray, Uint16Array, Uint32Array, URIError,
+      objects.WeakMap, objects.WeakSet
+    ].forEach(function(ctor) {
+        Object.getOwnPropertyNames(ctor).map(add);
+        if (ctor.prototype) {
+            Object.getOwnPropertyNames(ctor.prototype).map(add);
+        }
+    });
+    function add(name) {
+        reserved.add(name);
+    }
+}
+
+function reserve_quoted_keys(ast, reserved) {
+    function add(name) {
+        push_uniq(reserved, name);
+    }
+
+    ast.walk(new TreeWalker(function(node) {
+        if (node instanceof AST_ObjectKeyVal && node.quote) {
+            add(node.key);
+        } else if (node instanceof AST_ObjectProperty && node.quote) {
+            add(node.key.name);
+        } else if (node instanceof AST_Sub) {
+            addStrings(node.property, add);
+        }
+    }));
+}
+
+function addStrings(node, add) {
+    node.walk(new TreeWalker(function(node) {
+        if (node instanceof AST_Sequence) {
+            addStrings(node.tail_node(), add);
+        } else if (node instanceof AST_String) {
+            add(node.value);
+        } else if (node instanceof AST_Conditional) {
+            addStrings(node.consequent, add);
+            addStrings(node.alternative, add);
+        }
+        return true;
+    }));
+}
+
+function mangle_private_properties(ast, options) {
+    var cprivate = -1;
+    var private_cache = new Map();
+    var nth_identifier = options.nth_identifier || base54;
+
+    ast =  ast.transform(new TreeTransformer(function(node) {
+        if (
+            node instanceof AST_ClassPrivateProperty
+            || node instanceof AST_PrivateMethod
+            || node instanceof AST_PrivateGetter
+            || node instanceof AST_PrivateSetter
+            || node instanceof AST_PrivateIn
+        ) {
+            node.key.name = mangle_private(node.key.name);
+        } else if (node instanceof AST_DotHash) {
+            node.property = mangle_private(node.property);
+        }
+    }));
+    return ast;
+
+    function mangle_private(name) {
+        let mangled = private_cache.get(name);
+        if (!mangled) {
+            mangled = nth_identifier.get(++cprivate);
+            private_cache.set(name, mangled);
+        }
+
+        return mangled;
+    }
+}
+
+function find_annotated_props(ast) {
+    var annotated_props = new Set();
+    walk(ast, node => {
+        if (
+            node instanceof AST_ClassPrivateProperty
+            || node instanceof AST_PrivateMethod
+            || node instanceof AST_PrivateGetter
+            || node instanceof AST_PrivateSetter
+            || node instanceof AST_DotHash
+        ) ; else if (node instanceof AST_ObjectKeyVal) {
+            if (typeof node.key == "string" && has_annotation(node, _MANGLEPROP)) {
+                annotated_props.add(node.key);
+            }
+        } else if (node instanceof AST_ObjectProperty) {
+            // setter or getter, since KeyVal is handled above
+            if (has_annotation(node, _MANGLEPROP)) {
+                annotated_props.add(node.key.name);
+            }
+        } else if (node instanceof AST_Dot) {
+            if (has_annotation(node, _MANGLEPROP)) {
+                annotated_props.add(node.property);
+            }
+        } else if (node instanceof AST_Sub) {
+            if (node.property instanceof AST_String && has_annotation(node, _MANGLEPROP)) {
+                annotated_props.add(node.property.value);
+            }
+        }
+    });
+    return annotated_props;
+}
+
+function mangle_properties(ast, options, annotated_props = find_annotated_props(ast)) {
+    options = defaults(options, {
+        builtins: false,
+        cache: null,
+        debug: false,
+        keep_quoted: false,
+        nth_identifier: base54,
+        only_cache: false,
+        regex: null,
+        reserved: null,
+        undeclared: false,
+        only_annotated: false,
+    }, true);
+
+    var nth_identifier = options.nth_identifier;
+
+    var reserved_option = options.reserved;
+    if (!Array.isArray(reserved_option)) reserved_option = [reserved_option];
+    var reserved = new Set(reserved_option);
+    if (!options.builtins) find_builtins(reserved);
+
+    var cname = -1;
+
+    var cache;
+    if (options.cache) {
+        cache = options.cache.props;
+    } else {
+        cache = new Map();
+    }
+
+    var only_annotated = options.only_annotated;
+    var regex = options.regex && new RegExp(options.regex);
+
+    // note debug is either false (disabled), or a string of the debug suffix to use (enabled).
+    // note debug may be enabled as an empty string, which is falsey. Also treat passing 'true'
+    // the same as passing an empty string.
+    var debug = options.debug !== false;
+    var debug_name_suffix;
+    if (debug) {
+        debug_name_suffix = (options.debug === true ? "" : options.debug);
+    }
+
+    var names_to_mangle = new Set();
+    var unmangleable = new Set();
+    // Track each already-mangled name to prevent nth_identifier from generating
+    // the same name.
+    cache.forEach((mangled_name) => unmangleable.add(mangled_name));
+
+    var keep_quoted = !!options.keep_quoted;
+
+    // step 1: find candidates to mangle
+    ast.walk(new TreeWalker(function(node) {
+        if (
+            node instanceof AST_ClassPrivateProperty
+            || node instanceof AST_PrivateMethod
+            || node instanceof AST_PrivateGetter
+            || node instanceof AST_PrivateSetter
+            || node instanceof AST_DotHash
+        ) ; else if (node instanceof AST_ObjectKeyVal) {
+            if (typeof node.key == "string" && (!keep_quoted || !node.quote)) {
+                add(node.key);
+            }
+        } else if (node instanceof AST_ObjectProperty) {
+            // setter or getter, since KeyVal is handled above
+            if (!keep_quoted || !node.quote) {
+                add(node.key.name);
+            }
+        } else if (node instanceof AST_Dot) {
+            var declared = !!options.undeclared;
+            if (!declared) {
+                var root = node;
+                while (root.expression) {
+                    root = root.expression;
+                }
+                declared = !(root.thedef && root.thedef.undeclared);
+            }
+            if (declared &&
+                (!keep_quoted || !node.quote)) {
+                add(node.property);
+            }
+        } else if (node instanceof AST_Sub) {
+            if (!keep_quoted) {
+                addStrings(node.property, add);
+            }
+        } else if (node instanceof AST_Call
+            && node.expression.print_to_string() == "Object.defineProperty") {
+            addStrings(node.args[1], add);
+        } else if (node instanceof AST_Binary && node.operator === "in") {
+            addStrings(node.left, add);
+        } else if (node instanceof AST_String && has_annotation(node, _KEY)) {
+            add(node.value);
+        }
+    }));
+
+    // step 2: transform the tree, renaming properties
+    return ast.transform(new TreeTransformer(function(node) {
+        if (
+            node instanceof AST_ClassPrivateProperty
+            || node instanceof AST_PrivateMethod
+            || node instanceof AST_PrivateGetter
+            || node instanceof AST_PrivateSetter
+            || node instanceof AST_DotHash
+        ) ; else if (node instanceof AST_ObjectKeyVal) {
+            if (typeof node.key == "string" && (!keep_quoted || !node.quote)) {
+                node.key = mangle(node.key);
+            }
+        } else if (node instanceof AST_ObjectProperty) {
+            // setter, getter, method or class field
+            if (!keep_quoted || !node.quote) {
+                if (!node.computed_key()) {
+                    node.key.name = mangle(node.key.name);
+                }
+            }
+        } else if (node instanceof AST_Dot) {
+            if (!keep_quoted || !node.quote) {
+                node.property = mangle(node.property);
+            }
+        } else if (!keep_quoted && node instanceof AST_Sub) {
+            node.property = mangleStrings(node.property);
+        } else if (node instanceof AST_Call
+            && node.expression.print_to_string() == "Object.defineProperty") {
+            node.args[1] = mangleStrings(node.args[1]);
+        } else if (node instanceof AST_Binary && node.operator === "in") {
+            node.left = mangleStrings(node.left);
+        } else if (node instanceof AST_String && has_annotation(node, _KEY)) {
+            // Clear _KEY annotation to prevent double mangling
+            clear_annotation(node, _KEY);
+            node.value = mangle(node.value);
+        }
+    }));
+
+    // only function declarations after this line
+
+    function can_mangle(name) {
+        if (unmangleable.has(name)) return false;
+        if (reserved.has(name)) return false;
+        if (options.only_cache) {
+            return cache.has(name);
+        }
+        if (/^-?[0-9]+(\.[0-9]+)?(e[+-][0-9]+)?$/.test(name)) return false;
+        return true;
+    }
+
+    function should_mangle(name) {
+        if (only_annotated && !annotated_props.has(name)) return false;
+        if (regex && !regex.test(name)) {
+            return annotated_props.has(name);
+        }
+        if (reserved.has(name)) return false;
+        return cache.has(name)
+            || names_to_mangle.has(name);
+    }
+
+    function add(name) {
+        if (can_mangle(name)) {
+            names_to_mangle.add(name);
+        }
+
+        if (!should_mangle(name)) {
+            unmangleable.add(name);
+        }
+    }
+
+    function mangle(name) {
+        if (!should_mangle(name)) {
+            return name;
+        }
+
+        var mangled = cache.get(name);
+        if (!mangled) {
+            if (debug) {
+                // debug mode: use a prefix and suffix to preserve readability, e.g. o.foo -> o._$foo$NNN_.
+                var debug_mangled = "_$" + name + "$" + debug_name_suffix + "_";
+
+                if (can_mangle(debug_mangled)) {
+                    mangled = debug_mangled;
+                }
+            }
+
+            // either debug mode is off, or it is on and we could not use the mangled name
+            if (!mangled) {
+                do {
+                    mangled = nth_identifier.get(++cname);
+                } while (!can_mangle(mangled));
+            }
+
+            cache.set(name, mangled);
+        }
+        return mangled;
+    }
+
+    function mangleStrings(node) {
+        return node.transform(new TreeTransformer(function(node) {
+            if (node instanceof AST_Sequence) {
+                var last = node.expressions.length - 1;
+                node.expressions[last] = mangleStrings(node.expressions[last]);
+            } else if (node instanceof AST_String) {
+                // Clear _KEY annotation to prevent double mangling
+                clear_annotation(node, _KEY);
+                node.value = mangle(node.value);
+            } else if (node instanceof AST_Conditional) {
+                node.consequent = mangleStrings(node.consequent);
+                node.alternative = mangleStrings(node.alternative);
+            }
+            return node;
+        }));
+    }
+}
+
+// to/from base64 functions
+// Prefer built-in Buffer, if available, then use hack
+// https://developer.mozilla.org/en-US/docs/Glossary/Base64#The_Unicode_Problem
+var to_ascii = typeof Buffer !== "undefined"
+    ? (b64) => Buffer.from(b64, "base64").toString()
+    : (b64) => decodeURIComponent(escape(atob(b64)));
+var to_base64 = typeof Buffer !== "undefined"
+    ? (str) => Buffer.from(str).toString("base64")
+    : (str) => btoa(unescape(encodeURIComponent(str)));
+
+function read_source_map(code) {
+    var match = /(?:^|[^.])\/\/# sourceMappingURL=data:application\/json(;[\w=-]*)?;base64,([+/0-9A-Za-z]*=*)\s*$/.exec(code);
+    if (!match) {
+        console.warn("inline source map not found");
+        return null;
+    }
+    return to_ascii(match[2]);
+}
+
+function set_shorthand(name, options, keys) {
+    if (options[name]) {
+        keys.forEach(function(key) {
+            if (options[key]) {
+                if (typeof options[key] != "object") options[key] = {};
+                if (!(name in options[key])) options[key][name] = options[name];
+            }
+        });
+    }
+}
+
+function init_cache(cache) {
+    if (!cache) return;
+    if (!("props" in cache)) {
+        cache.props = new Map();
+    } else if (!(cache.props instanceof Map)) {
+        cache.props = map_from_object(cache.props);
+    }
+}
+
+function cache_to_json(cache) {
+    return {
+        props: map_to_object(cache.props)
+    };
+}
+
+function log_input(files, options, fs, debug_folder) {
+    if (!(fs && fs.writeFileSync && fs.mkdirSync)) {
+        return;
+    }
+
+    try {
+        fs.mkdirSync(debug_folder);
+    } catch (e) {
+        if (e.code !== "EEXIST") throw e;
+    }
+
+    const log_path = `${debug_folder}/terser-debug-${(Math.random() * 9999999) | 0}.log`;
+
+    options = options || {};
+
+    const options_str = JSON.stringify(options, (_key, thing) => {
+        if (typeof thing === "function") return "[Function " + thing.toString() + "]";
+        if (thing instanceof RegExp) return "[RegExp " + thing.toString() + "]";
+        return thing;
+    }, 4);
+
+    const files_str = (file) => {
+        if (typeof file === "object" && options.parse && options.parse.spidermonkey) {
+            return JSON.stringify(file, null, 2);
+        } else if (typeof file === "object") {
+            return Object.keys(file)
+                .map((key) => key + ": " + files_str(file[key]))
+                .join("\n\n");
+        } else if (typeof file === "string") {
+            return "```\n" + file + "\n```";
+        } else {
+            return file; // What do?
+        }
+    };
+
+    fs.writeFileSync(log_path, "Options: \n" + options_str + "\n\nInput files:\n\n" + files_str(files) + "\n");
+}
+
+function* minify_sync_or_async(files, options, _fs_module) {
+    if (
+        _fs_module
+        && typeof process === "object"
+        && process.env
+        && typeof process.env.TERSER_DEBUG_DIR === "string"
+    ) {
+        log_input(files, options, _fs_module, process.env.TERSER_DEBUG_DIR);
+    }
+
+    options = defaults(options, {
+        compress: {},
+        ecma: undefined,
+        enclose: false,
+        ie8: false,
+        keep_classnames: undefined,
+        keep_fnames: false,
+        mangle: {},
+        module: false,
+        nameCache: null,
+        output: null,
+        format: null,
+        parse: {},
+        rename: undefined,
+        safari10: false,
+        sourceMap: false,
+        spidermonkey: false,
+        timings: false,
+        toplevel: false,
+        warnings: false,
+        wrap: false,
+    }, true);
+
+    var timings = options.timings && {
+        start: Date.now()
+    };
+    if (options.keep_classnames === undefined) {
+        options.keep_classnames = options.keep_fnames;
+    }
+    if (options.rename === undefined) {
+        options.rename = options.compress && options.mangle;
+    }
+    if (options.output && options.format) {
+        throw new Error("Please only specify either output or format option, preferrably format.");
+    }
+    options.format = options.format || options.output || {};
+    set_shorthand("ecma", options, [ "parse", "compress", "format" ]);
+    set_shorthand("ie8", options, [ "compress", "mangle", "format" ]);
+    set_shorthand("keep_classnames", options, [ "compress", "mangle" ]);
+    set_shorthand("keep_fnames", options, [ "compress", "mangle" ]);
+    set_shorthand("module", options, [ "parse", "compress", "mangle" ]);
+    set_shorthand("safari10", options, [ "mangle", "format" ]);
+    set_shorthand("toplevel", options, [ "compress", "mangle" ]);
+    set_shorthand("warnings", options, [ "compress" ]); // legacy
+    var quoted_props;
+    if (options.mangle) {
+        options.mangle = defaults(options.mangle, {
+            cache: options.nameCache && (options.nameCache.vars || {}),
+            eval: false,
+            ie8: false,
+            keep_classnames: false,
+            keep_fnames: false,
+            module: false,
+            nth_identifier: base54,
+            properties: false,
+            reserved: [],
+            safari10: false,
+            toplevel: false,
+        }, true);
+        if (options.mangle.properties) {
+            if (typeof options.mangle.properties != "object") {
+                options.mangle.properties = {};
+            }
+            if (options.mangle.properties.keep_quoted) {
+                quoted_props = options.mangle.properties.reserved;
+                if (!Array.isArray(quoted_props)) quoted_props = [];
+                options.mangle.properties.reserved = quoted_props;
+            }
+            if (options.nameCache && !("cache" in options.mangle.properties)) {
+                options.mangle.properties.cache = options.nameCache.props || {};
+            }
+        }
+        init_cache(options.mangle.cache);
+        init_cache(options.mangle.properties.cache);
+    }
+    if (options.sourceMap) {
+        options.sourceMap = defaults(options.sourceMap, {
+            asObject: false,
+            content: null,
+            filename: null,
+            includeSources: false,
+            root: null,
+            url: null,
+        }, true);
+    }
+
+    // -- Parse phase --
+    if (timings) timings.parse = Date.now();
+    var toplevel;
+    if (files instanceof AST_Toplevel) {
+        toplevel = files;
+    } else {
+        if (typeof files == "string" || (options.parse.spidermonkey && !Array.isArray(files))) {
+            files = [ files ];
+        }
+        options.parse = options.parse || {};
+        options.parse.toplevel = null;
+
+        if (options.parse.spidermonkey) {
+            options.parse.toplevel = AST_Node.from_mozilla_ast(Object.keys(files).reduce(function(toplevel, name) {
+                if (!toplevel) return files[name];
+                toplevel.body = toplevel.body.concat(files[name].body);
+                return toplevel;
+            }, null));
+        } else {
+            delete options.parse.spidermonkey;
+
+            for (var name in files) if (HOP(files, name)) {
+                options.parse.filename = name;
+                options.parse.toplevel = parse(files[name], options.parse);
+                if (options.sourceMap && options.sourceMap.content == "inline") {
+                    if (Object.keys(files).length > 1)
+                        throw new Error("inline source map only works with singular input");
+                    options.sourceMap.content = read_source_map(files[name]);
+                }
+            }
+        }
+        if (options.parse.toplevel === null) {
+            throw new Error("no source file given");
+        }
+
+        toplevel = options.parse.toplevel;
+    }
+    if (quoted_props && options.mangle.properties.keep_quoted !== "strict") {
+        reserve_quoted_keys(toplevel, quoted_props);
+    }
+    var annotated_props;
+    if (options.mangle && options.mangle.properties) {
+        annotated_props = find_annotated_props(toplevel);
+    }
+    if (options.wrap) {
+        toplevel = toplevel.wrap_commonjs(options.wrap);
+    }
+    if (options.enclose) {
+        toplevel = toplevel.wrap_enclose(options.enclose);
+    }
+    if (timings) timings.rename = Date.now();
+
+    // -- Compress phase --
+    if (timings) timings.compress = Date.now();
+    if (options.compress) {
+        toplevel = new Compressor(options.compress, {
+            mangle_options: options.mangle
+        }).compress(toplevel);
+    }
+
+    // -- Mangle phase --
+    if (timings) timings.scope = Date.now();
+    if (options.mangle) toplevel.figure_out_scope(options.mangle);
+    if (timings) timings.mangle = Date.now();
+    if (options.mangle) {
+        toplevel.compute_char_frequency(options.mangle);
+        toplevel.mangle_names(options.mangle);
+        toplevel = mangle_private_properties(toplevel, options.mangle);
+    }
+    if (timings) timings.properties = Date.now();
+    if (options.mangle && options.mangle.properties) {
+        toplevel = mangle_properties(toplevel, options.mangle.properties, annotated_props);
+    }
+
+    // Format phase
+    if (timings) timings.format = Date.now();
+    var result = {};
+    if (options.format.ast) {
+        result.ast = toplevel;
+    }
+    if (options.format.spidermonkey) {
+        result.ast = toplevel.to_mozilla_ast();
+    }
+    let format_options;
+    if (!HOP(options.format, "code") || options.format.code) {
+        // Make a shallow copy so that we can modify without mutating the user's input.
+        format_options = {...options.format};
+        if (!format_options.ast) {
+            // Destroy stuff to save RAM. (unless the deprecated `ast` option is on)
+            format_options._destroy_ast = true;
+
+            walk(toplevel, node => {
+                if (node instanceof AST_Scope) {
+                    node.variables = undefined;
+                    node.enclosed = undefined;
+                    node.parent_scope = undefined;
+                }
+                if (node.block_scope) {
+                    node.block_scope.variables = undefined;
+                    node.block_scope.enclosed = undefined;
+                    node.block_scope.parent_scope = undefined;
+                }
+            });
+        }
+
+        if (options.sourceMap) {
+            if (options.sourceMap.includeSources && files instanceof AST_Toplevel) {
+                throw new Error("original source content unavailable");
+            }
+            format_options.source_map = yield* SourceMap({
+                file: options.sourceMap.filename,
+                orig: options.sourceMap.content,
+                root: options.sourceMap.root,
+                files: options.sourceMap.includeSources ? files : null,
+            });
+        }
+        delete format_options.ast;
+        delete format_options.code;
+        delete format_options.spidermonkey;
+        var stream = OutputStream(format_options);
+        toplevel.print(stream);
+        result.code = stream.get();
+        if (options.sourceMap) {
+            Object.defineProperty(result, "map", {
+                configurable: true,
+                enumerable: true,
+                get() {
+                    const map = format_options.source_map.getEncoded();
+                    return (result.map = options.sourceMap.asObject ? map : JSON.stringify(map));
+                },
+                set(value) {
+                    Object.defineProperty(result, "map", {
+                        value,
+                        writable: true,
+                    });
+                }
+            });
+            result.decoded_map = format_options.source_map.getDecoded();
+            if (options.sourceMap.url == "inline") {
+                var sourceMap = typeof result.map === "object" ? JSON.stringify(result.map) : result.map;
+                result.code += "\n//# sourceMappingURL=data:application/json;charset=utf-8;base64," + to_base64(sourceMap);
+            } else if (options.sourceMap.url) {
+                result.code += "\n//# sourceMappingURL=" + options.sourceMap.url;
+            }
+        }
+    }
+    if (options.nameCache && options.mangle) {
+        if (options.mangle.cache) options.nameCache.vars = cache_to_json(options.mangle.cache);
+        if (options.mangle.properties && options.mangle.properties.cache) {
+            options.nameCache.props = cache_to_json(options.mangle.properties.cache);
+        }
+    }
+    if (format_options && format_options.source_map) {
+        format_options.source_map.destroy();
+    }
+    if (timings) {
+        timings.end = Date.now();
+        result.timings = {
+            parse: 1e-3 * (timings.rename - timings.parse),
+            rename: 1e-3 * (timings.compress - timings.rename),
+            compress: 1e-3 * (timings.scope - timings.compress),
+            scope: 1e-3 * (timings.mangle - timings.scope),
+            mangle: 1e-3 * (timings.properties - timings.mangle),
+            properties: 1e-3 * (timings.format - timings.properties),
+            format: 1e-3 * (timings.end - timings.format),
+            total: 1e-3 * (timings.end - timings.start)
+        };
+    }
+    return result;
+}
+
+async function minify(files, options, _fs_module) {
+    const gen = minify_sync_or_async(files, options, _fs_module);
+
+    let yielded;
+    let val;
+    do {
+        val = gen.next(await yielded);
+        yielded = val.value;
+    } while (!val.done);
+
+    return val.value;
+}
+
+function minify_sync(files, options, _fs_module) {
+    const gen = minify_sync_or_async(files, options, _fs_module);
+
+    let yielded;
+    let val;
+    do {
+        if (yielded && typeof yielded.then === "function") {
+            throw new Error("minify_sync cannot be used with the legacy source-map module");
+        }
+        val = gen.next(yielded);
+        yielded = val.value;
+    } while (!val.done);
+
+    return val.value;
+}
+
+async function run_cli({ program, packageJson, fs, path }) {
+    const skip_keys = new Set([ "cname", "parent_scope", "scope", "uses_eval", "uses_with" ]);
+    var files = {};
+    var options = {
+        compress: false,
+        mangle: false
+    };
+    const default_options = await _default_options();
+    program.version(packageJson.name + " " + packageJson.version);
+    program.parseArgv = program.parse;
+    program.parse = undefined;
+
+    if (process.argv.includes("ast")) program.helpInformation = describe_ast;
+    else if (process.argv.includes("options")) program.helpInformation = function() {
+        var text = [];
+        for (var option in default_options) {
+            text.push("--" + (option === "sourceMap" ? "source-map" : option) + " options:");
+            text.push(format_object(default_options[option]));
+            text.push("");
+        }
+        return text.join("\n");
+    };
+
+    program.option("-p, --parse <options>", "Specify parser options.", parse_js());
+    program.option("-c, --compress [options]", "Enable compressor/specify compressor options.", parse_js());
+    program.option("-m, --mangle [options]", "Mangle names/specify mangler options.", parse_js());
+    program.option("--mangle-props [options]", "Mangle properties/specify mangler options.", parse_js());
+    program.option("-f, --format [options]", "Format options.", parse_js());
+    program.option("-b, --beautify [options]", "Alias for --format.", parse_js());
+    program.option("-o, --output <file>", "Output file (default STDOUT).");
+    program.option("--comments [filter]", "Preserve copyright comments in the output.");
+    program.option("--config-file <file>", "Read minify() options from JSON file.");
+    program.option("-d, --define <expr>[=value]", "Global definitions.", parse_js("define"));
+    program.option("--ecma <version>", "Specify ECMAScript release: 5, 2015, 2016 or 2017...");
+    program.option("-e, --enclose [arg[,...][:value[,...]]]", "Embed output in a big function with configurable arguments and values.");
+    program.option("--ie8", "Support non-standard Internet Explorer 8.");
+    program.option("--keep-classnames", "Do not mangle/drop class names.");
+    program.option("--keep-fnames", "Do not mangle/drop function names. Useful for code relying on Function.prototype.name.");
+    program.option("--module", "Input is an ES6 module");
+    program.option("--name-cache <file>", "File to hold mangled name mappings.");
+    program.option("--rename", "Force symbol expansion.");
+    program.option("--no-rename", "Disable symbol expansion.");
+    program.option("--safari10", "Support non-standard Safari 10.");
+    program.option("--source-map [options]", "Enable source map/specify source map options.", parse_js());
+    program.option("--timings", "Display operations run time on STDERR.");
+    program.option("--toplevel", "Compress and/or mangle variables in toplevel scope.");
+    program.option("--wrap <name>", "Embed everything as a function with “exports” corresponding to “name” globally.");
+    program.arguments("[files...]").parseArgv(process.argv);
+    if (program.configFile) {
+        options = JSON.parse(read_file(program.configFile));
+    }
+    if (!program.output && program.sourceMap && program.sourceMap.url != "inline") {
+        fatal("ERROR: cannot write source map to STDOUT");
+    }
+
+    [
+        "compress",
+        "enclose",
+        "ie8",
+        "mangle",
+        "module",
+        "safari10",
+        "sourceMap",
+        "toplevel",
+        "wrap"
+    ].forEach(function(name) {
+        if (name in program) {
+            options[name] = program[name];
+        }
+    });
+
+    if ("ecma" in program) {
+        if (program.ecma != (program.ecma | 0)) fatal("ERROR: ecma must be an integer");
+        const ecma = program.ecma | 0;
+        if (ecma > 5 && ecma < 2015)
+            options.ecma = ecma + 2009;
+        else
+            options.ecma = ecma;
+    }
+    if (program.format || program.beautify) {
+        const chosenOption = program.format || program.beautify;
+        options.format = typeof chosenOption === "object" ? chosenOption : {};
+    }
+    if (program.comments) {
+        if (typeof options.format != "object") options.format = {};
+        options.format.comments = typeof program.comments == "string" ? (program.comments == "false" ? false : program.comments) : "some";
+    }
+    if (program.define) {
+        if (typeof options.compress != "object") options.compress = {};
+        if (typeof options.compress.global_defs != "object") options.compress.global_defs = {};
+        for (var expr in program.define) {
+            options.compress.global_defs[expr] = program.define[expr];
+        }
+    }
+    if (program.keepClassnames) {
+        options.keep_classnames = true;
+    }
+    if (program.keepFnames) {
+        options.keep_fnames = true;
+    }
+    if (program.mangleProps) {
+        if (program.mangleProps.domprops) {
+            delete program.mangleProps.domprops;
+        } else {
+            if (typeof program.mangleProps != "object") program.mangleProps = {};
+            if (!Array.isArray(program.mangleProps.reserved)) program.mangleProps.reserved = [];
+        }
+        if (typeof options.mangle != "object") options.mangle = {};
+        options.mangle.properties = program.mangleProps;
+    }
+    if (program.nameCache) {
+        options.nameCache = JSON.parse(read_file(program.nameCache, "{}"));
+    }
+    if (program.output == "ast") {
+        options.format = {
+            ast: true,
+            code: false
+        };
+    }
+    if (program.parse) {
+        if (!program.parse.acorn && !program.parse.spidermonkey) {
+            options.parse = program.parse;
+        } else if (program.sourceMap && program.sourceMap.content == "inline") {
+            fatal("ERROR: inline source map only works with built-in parser");
+        }
+    }
+    if (~program.rawArgs.indexOf("--rename")) {
+        options.rename = true;
+    } else if (!program.rename) {
+        options.rename = false;
+    }
+
+    let convert_path = name => name;
+    if (typeof program.sourceMap == "object" && "base" in program.sourceMap) {
+        convert_path = function() {
+            var base = program.sourceMap.base;
+            delete options.sourceMap.base;
+            return function(name) {
+                return path.relative(base, name);
+            };
+        }();
+    }
+
+    let filesList;
+    if (options.files && options.files.length) {
+        filesList = options.files;
+
+        delete options.files;
+    } else if (program.args.length) {
+        filesList = program.args;
+    }
+
+    if (filesList) {
+        simple_glob(filesList).forEach(function(name) {
+            files[convert_path(name)] = read_file(name);
+        });
+    } else {
+        await new Promise((resolve) => {
+            var chunks = [];
+            process.stdin.setEncoding("utf8");
+            process.stdin.on("data", function(chunk) {
+                chunks.push(chunk);
+            }).on("end", function() {
+                files = [ chunks.join("") ];
+                resolve();
+            });
+            process.stdin.resume();
+        });
+    }
+
+    await run_cli();
+
+    function convert_ast(fn) {
+        return AST_Node.from_mozilla_ast(Object.keys(files).reduce(fn, null));
+    }
+
+    async function run_cli() {
+        var content = program.sourceMap && program.sourceMap.content;
+        if (content && content !== "inline") {
+            options.sourceMap.content = read_file(content, content);
+        }
+        if (program.timings) options.timings = true;
+
+        try {
+            if (program.parse) {
+                if (program.parse.acorn) {
+                    files = convert_ast(function(toplevel, name) {
+                        return require("acorn").parse(files[name], {
+                            ecmaVersion: 2024,
+                            locations: true,
+                            program: toplevel,
+                            sourceFile: name,
+                            sourceType: options.module || program.parse.module ? "module" : "script"
+                        });
+                    });
+                } else if (program.parse.spidermonkey) {
+                    files = convert_ast(function(toplevel, name) {
+                        var obj = JSON.parse(files[name]);
+                        if (!toplevel) return obj;
+                        toplevel.body = toplevel.body.concat(obj.body);
+                        return toplevel;
+                    });
+                }
+            }
+        } catch (ex) {
+            fatal(ex);
+        }
+
+        let result;
+        try {
+            result = await minify(files, options, fs);
+        } catch (ex) {
+            if (ex.name == "SyntaxError") {
+                print_error("Parse error at " + ex.filename + ":" + ex.line + "," + ex.col);
+                var col = ex.col;
+                var lines = files[ex.filename].split(/\r?\n/);
+                var line = lines[ex.line - 1];
+                if (!line && !col) {
+                    line = lines[ex.line - 2];
+                    col = line.length;
+                }
+                if (line) {
+                    var limit = 70;
+                    if (col > limit) {
+                        line = line.slice(col - limit);
+                        col = limit;
+                    }
+                    print_error(line.slice(0, 80));
+                    print_error(line.slice(0, col).replace(/\S/g, " ") + "^");
+                }
+            }
+            if (ex.defs) {
+                print_error("Supported options:");
+                print_error(format_object(ex.defs));
+            }
+            fatal(ex);
+            return;
+        }
+
+        if (program.output == "ast") {
+            if (!options.compress && !options.mangle) {
+                result.ast.figure_out_scope({});
+            }
+            console.log(JSON.stringify(result.ast, function(key, value) {
+                if (value) switch (key) {
+                  case "thedef":
+                    return symdef(value);
+                  case "enclosed":
+                    return value.length ? value.map(symdef) : undefined;
+                  case "variables":
+                  case "globals":
+                    return value.size ? collect_from_map(value, symdef) : undefined;
+                }
+                if (skip_keys.has(key)) return;
+                if (value instanceof AST_Token) return;
+                if (value instanceof Map) return;
+                if (value instanceof AST_Node) {
+                    var result = {
+                        _class: "AST_" + value.TYPE
+                    };
+                    if (value.block_scope) {
+                        result.variables = value.block_scope.variables;
+                        result.enclosed = value.block_scope.enclosed;
+                    }
+                    value.CTOR.PROPS.forEach(function(prop) {
+                        if (prop !== "block_scope") {
+                            result[prop] = value[prop];
+                        }
+                    });
+                    return result;
+                }
+                return value;
+            }, 2));
+        } else if (program.output == "spidermonkey") {
+            try {
+                const minified = await minify(
+                    result.code,
+                    {
+                        compress: false,
+                        mangle: false,
+                        format: {
+                            ast: true,
+                            code: false
+                        }
+                    },
+                    fs
+                );
+                console.log(JSON.stringify(minified.ast.to_mozilla_ast(), null, 2));
+            } catch (ex) {
+                fatal(ex);
+                return;
+            }
+        } else if (program.output) {
+            fs.mkdirSync(path.dirname(program.output), { recursive: true });
+            fs.writeFileSync(program.output, result.code);
+            if (options.sourceMap && options.sourceMap.url !== "inline" && result.map) {
+                fs.writeFileSync(program.output + ".map", result.map);
+            }
+        } else {
+            console.log(result.code);
+        }
+        if (program.nameCache) {
+            fs.writeFileSync(program.nameCache, JSON.stringify(options.nameCache));
+        }
+        if (result.timings) for (var phase in result.timings) {
+            print_error("- " + phase + ": " + result.timings[phase].toFixed(3) + "s");
+        }
+    }
+
+    function fatal(message) {
+        if (message instanceof Error) message = message.stack.replace(/^\S*?Error:/, "ERROR:");
+        print_error(message);
+        process.exit(1);
+    }
+
+    // A file glob function that only supports "*" and "?" wildcards in the basename.
+    // Example: "foo/bar/*baz??.*.js"
+    // Argument `glob` may be a string or an array of strings.
+    // Returns an array of strings. Garbage in, garbage out.
+    function simple_glob(glob) {
+        if (Array.isArray(glob)) {
+            return [].concat.apply([], glob.map(simple_glob));
+        }
+        if (glob && glob.match(/[*?]/)) {
+            var dir = path.dirname(glob);
+            try {
+                var entries = fs.readdirSync(dir);
+            } catch (ex) {}
+            if (entries) {
+                var pattern = "^" + path.basename(glob)
+                    .replace(/[.+^$[\]\\(){}]/g, "\\$&")
+                    .replace(/\*/g, "[^/\\\\]*")
+                    .replace(/\?/g, "[^/\\\\]") + "$";
+                var mod = process.platform === "win32" ? "i" : "";
+                var rx = new RegExp(pattern, mod);
+                var results = entries.filter(function(name) {
+                    return rx.test(name);
+                }).map(function(name) {
+                    return path.join(dir, name);
+                });
+                if (results.length) return results;
+            }
+        }
+        return [ glob ];
+    }
+
+    function read_file(path, default_value) {
+        try {
+            return fs.readFileSync(path, "utf8");
+        } catch (ex) {
+            if ((ex.code == "ENOENT" || ex.code == "ENAMETOOLONG") && default_value != null) return default_value;
+            fatal(ex);
+        }
+    }
+
+    function parse_js(flag) {
+        return function(value, options) {
+            options = options || {};
+            try {
+                walk(parse(value, { expression: true }), node => {
+                    if (node instanceof AST_Assign) {
+                        var name = node.left.print_to_string();
+                        var value = node.right;
+                        if (flag) {
+                            options[name] = value;
+                        } else if (value instanceof AST_Array) {
+                            options[name] = value.elements.map(to_string);
+                        } else if (value instanceof AST_RegExp) {
+                            value = value.value;
+                            options[name] = new RegExp(value.source, value.flags);
+                        } else {
+                            options[name] = to_string(value);
+                        }
+                        return true;
+                    }
+                    if (node instanceof AST_Symbol || node instanceof AST_PropAccess) {
+                        var name = node.print_to_string();
+                        options[name] = true;
+                        return true;
+                    }
+                    if (!(node instanceof AST_Sequence)) throw node;
+
+                    function to_string(value) {
+                        return value instanceof AST_Constant ? value.getValue() : value.print_to_string({
+                            quote_keys: true
+                        });
+                    }
+                });
+            } catch(ex) {
+                if (flag) {
+                    fatal("Error parsing arguments for '" + flag + "': " + value);
+                } else {
+                    options[value] = null;
+                }
+            }
+            return options;
+        };
+    }
+
+    function symdef(def) {
+        var ret = (1e6 + def.id) + " " + def.name;
+        if (def.mangled_name) ret += " " + def.mangled_name;
+        return ret;
+    }
+
+    function collect_from_map(map, callback) {
+        var result = [];
+        map.forEach(function (def) {
+            result.push(callback(def));
+        });
+        return result;
+    }
+
+    function format_object(obj) {
+        var lines = [];
+        var padding = "";
+        Object.keys(obj).map(function(name) {
+            if (padding.length < name.length) padding = Array(name.length + 1).join(" ");
+            return [ name, JSON.stringify(obj[name]) ];
+        }).forEach(function(tokens) {
+            lines.push("  " + tokens[0] + padding.slice(tokens[0].length - 2) + tokens[1]);
+        });
+        return lines.join("\n");
+    }
+
+    function print_error(msg) {
+        process.stderr.write(msg);
+        process.stderr.write("\n");
+    }
+
+    function describe_ast() {
+        var out = OutputStream({ beautify: true });
+        function doitem(ctor) {
+            out.print("AST_" + ctor.TYPE);
+            const props = ctor.SELF_PROPS.filter(prop => !/^\$/.test(prop));
+
+            if (props.length > 0) {
+                out.space();
+                out.with_parens(function() {
+                    props.forEach(function(prop, i) {
+                        if (i) out.space();
+                        out.print(prop);
+                    });
+                });
+            }
+
+            if (ctor.documentation) {
+                out.space();
+                out.print_string(ctor.documentation);
+            }
+
+            if (ctor.SUBCLASSES.length > 0) {
+                out.space();
+                out.with_block(function() {
+                    ctor.SUBCLASSES.forEach(function(ctor) {
+                        out.indent();
+                        doitem(ctor);
+                        out.newline();
+                    });
+                });
+            }
+        }
+        doitem(AST_Node);
+        return out + "\n";
+    }
+}
+
+async function _default_options() {
+    const defs = {};
+
+    Object.keys(infer_options({ 0: 0 })).forEach((component) => {
+        const options = infer_options({
+            [component]: {0: 0}
+        });
+
+        if (options) defs[component] = options;
+    });
+    return defs;
+}
+
+async function infer_options(options) {
+    try {
+        await minify("", options);
+    } catch (error) {
+        return error.defs;
+    }
+}
+
+exports._default_options = _default_options;
+exports._run_cli = run_cli;
+exports.minify = minify;
+exports.minify_sync = minify_sync;
+
+}));
Index: frontend/node_modules/terser/dist/package.json
===================================================================
--- frontend/node_modules/terser/dist/package.json	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/dist/package.json	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,10 @@
+{
+  "name": "dist",
+  "private": true,
+  "version": "1.0.0",
+  "main": "bundle.min.js",
+  "type": "commonjs",
+  "author": "",
+  "license": "BSD-2-Clause",
+  "description": "A package to hold the Terser dist bundle as commonjs while keeping the rest of it ESM. Nothing to see here."
+}
Index: frontend/node_modules/terser/lib/ast.js
===================================================================
--- frontend/node_modules/terser/lib/ast.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/ast.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,3512 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+import {
+    HOP,
+    MAP,
+    noop
+} from "./utils/index.js";
+import { parse } from "./parse.js";
+
+function DEFNODE(type, props, ctor, methods, base = AST_Node) {
+    if (!props) props = [];
+    else props = props.split(/\s+/);
+    var self_props = props;
+    if (base && base.PROPS)
+        props = props.concat(base.PROPS);
+    const proto = base && Object.create(base.prototype);
+    if (proto) {
+        ctor.prototype = proto;
+        ctor.BASE = base;
+    }
+    if (base) base.SUBCLASSES.push(ctor);
+    ctor.prototype.CTOR = ctor;
+    ctor.prototype.constructor = ctor;
+    ctor.PROPS = props || null;
+    ctor.SELF_PROPS = self_props;
+    ctor.SUBCLASSES = [];
+    if (type) {
+        ctor.prototype.TYPE = ctor.TYPE = type;
+    }
+    if (methods) for (let i in methods) if (HOP(methods, i)) {
+        if (i[0] === "$") {
+            ctor[i.substr(1)] = methods[i];
+        } else {
+            ctor.prototype[i] = methods[i];
+        }
+    }
+    ctor.DEFMETHOD = function(name, method) {
+        this.prototype[name] = method;
+    };
+    return ctor;
+}
+
+const has_tok_flag = (tok, flag) => Boolean(tok.flags & flag);
+const set_tok_flag = (tok, flag, truth) => {
+    if (truth) {
+        tok.flags |= flag;
+    } else {
+        tok.flags &= ~flag;
+    }
+};
+
+const TOK_FLAG_NLB          = 0b0001;
+const TOK_FLAG_QUOTE_SINGLE = 0b0010;
+const TOK_FLAG_QUOTE_EXISTS = 0b0100;
+const TOK_FLAG_TEMPLATE_END = 0b1000;
+
+class AST_Token {
+    constructor(type, value, line, col, pos, nlb, comments_before, comments_after, file) {
+        this.flags = (nlb ? 1 : 0);
+
+        this.type = type;
+        this.value = value;
+        this.line = line;
+        this.col = col;
+        this.pos = pos;
+        this.comments_before = comments_before;
+        this.comments_after = comments_after;
+        this.file = file;
+
+        Object.seal(this);
+    }
+
+    // Return a string summary of the token for node.js console.log
+    [Symbol.for("nodejs.util.inspect.custom")](_depth, options) {
+        const special = str => options.stylize(str, "special");
+        const quote = typeof this.value === "string" && this.value.includes("`") ? "'" : "`";
+        const value = `${quote}${this.value}${quote}`;
+        return `${special("[AST_Token")} ${value} at ${this.line}:${this.col}${special("]")}`;
+    }
+
+    get nlb() {
+        return has_tok_flag(this, TOK_FLAG_NLB);
+    }
+
+    set nlb(new_nlb) {
+        set_tok_flag(this, TOK_FLAG_NLB, new_nlb);
+    }
+
+    get quote() {
+        return !has_tok_flag(this, TOK_FLAG_QUOTE_EXISTS)
+            ? ""
+            : (has_tok_flag(this, TOK_FLAG_QUOTE_SINGLE) ? "'" : '"');
+    }
+
+    set quote(quote_type) {
+        set_tok_flag(this, TOK_FLAG_QUOTE_SINGLE, quote_type === "'");
+        set_tok_flag(this, TOK_FLAG_QUOTE_EXISTS, !!quote_type);
+    }
+
+    get template_end() {
+        return has_tok_flag(this, TOK_FLAG_TEMPLATE_END);
+    }
+
+    set template_end(new_template_end) {
+        set_tok_flag(this, TOK_FLAG_TEMPLATE_END, new_template_end);
+    }
+}
+
+var AST_Node = DEFNODE("Node", "start end", function AST_Node(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    _clone: function(deep) {
+        if (deep) {
+            var self = this.clone();
+            return self.transform(new TreeTransformer(function(node) {
+                if (node !== self) {
+                    return node.clone(true);
+                }
+            }));
+        }
+        return new this.CTOR(this);
+    },
+    clone: function(deep) {
+        return this._clone(deep);
+    },
+    $documentation: "Base class of all AST nodes",
+    $propdoc: {
+        start: "[AST_Token] The first token of this node",
+        end: "[AST_Token] The last token of this node"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this);
+    },
+    walk: function(visitor) {
+        return this._walk(visitor); // not sure the indirection will be any help
+    },
+    _children_backwards: () => {}
+}, null);
+
+/* -----[ statements ]----- */
+
+var AST_Statement = DEFNODE("Statement", null, function AST_Statement(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class of all statements",
+});
+
+var AST_Debugger = DEFNODE("Debugger", null, function AST_Debugger(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Represents a debugger statement",
+}, AST_Statement);
+
+var AST_Directive = DEFNODE("Directive", "value quote", function AST_Directive(props) {
+    if (props) {
+        this.value = props.value;
+        this.quote = props.quote;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Represents a directive, like \"use strict\";",
+    $propdoc: {
+        value: "[string] The value of this directive as a plain string (it's not an AST_String!)",
+        quote: "[string] the original quote character"
+    },
+}, AST_Statement);
+
+var AST_SimpleStatement = DEFNODE("SimpleStatement", "body", function AST_SimpleStatement(props) {
+    if (props) {
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A statement consisting of an expression, i.e. a = 1 + 2",
+    $propdoc: {
+        body: "[AST_Node] an expression node (should not be instanceof AST_Statement)"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.body._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.body);
+    }
+}, AST_Statement);
+
+function walk_body(node, visitor) {
+    const body = node.body;
+    for (var i = 0, len = body.length; i < len; i++) {
+        body[i]._walk(visitor);
+    }
+}
+
+function clone_block_scope(deep) {
+    var clone = this._clone(deep);
+    if (this.block_scope) {
+        clone.block_scope = this.block_scope.clone();
+    }
+    return clone;
+}
+
+var AST_Block = DEFNODE("Block", "body block_scope", function AST_Block(props) {
+    if (props) {
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A body of statements (usually braced)",
+    $propdoc: {
+        body: "[AST_Statement*] an array of statements",
+        block_scope: "[AST_Scope] the block scope"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            walk_body(this, visitor);
+        });
+    },
+    _children_backwards(push) {
+        let i = this.body.length;
+        while (i--) push(this.body[i]);
+    },
+    clone: clone_block_scope
+}, AST_Statement);
+
+var AST_BlockStatement = DEFNODE("BlockStatement", null, function AST_BlockStatement(props) {
+    if (props) {
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A block statement",
+}, AST_Block);
+
+var AST_EmptyStatement = DEFNODE("EmptyStatement", null, function AST_EmptyStatement(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The empty statement (empty block or simply a semicolon)"
+}, AST_Statement);
+
+var AST_StatementWithBody = DEFNODE("StatementWithBody", "body", function AST_StatementWithBody(props) {
+    if (props) {
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for all statements that contain one nested body: `For`, `ForIn`, `Do`, `While`, `With`",
+    $propdoc: {
+        body: "[AST_Statement] the body; this should always be present, even if it's an AST_EmptyStatement"
+    }
+}, AST_Statement);
+
+var AST_LabeledStatement = DEFNODE("LabeledStatement", "label", function AST_LabeledStatement(props) {
+    if (props) {
+        this.label = props.label;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Statement with a label",
+    $propdoc: {
+        label: "[AST_Label] a label definition"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.label._walk(visitor);
+            this.body._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.body);
+        push(this.label);
+    },
+    clone: function(deep) {
+        var node = this._clone(deep);
+        if (deep) {
+            var label = node.label;
+            var def = this.label;
+            node.walk(new TreeWalker(function(node) {
+                if (node instanceof AST_LoopControl
+                    && node.label && node.label.thedef === def) {
+                    node.label.thedef = label;
+                    label.references.push(node);
+                }
+            }));
+        }
+        return node;
+    }
+}, AST_StatementWithBody);
+
+var AST_IterationStatement = DEFNODE(
+    "IterationStatement",
+    "block_scope",
+    function AST_IterationStatement(props) {
+        if (props) {
+            this.block_scope = props.block_scope;
+            this.body = props.body;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "Internal class.  All loops inherit from it.",
+        $propdoc: {
+            block_scope: "[AST_Scope] the block scope for this iteration statement."
+        },
+        clone: clone_block_scope
+    },
+    AST_StatementWithBody
+);
+
+var AST_DWLoop = DEFNODE("DWLoop", "condition", function AST_DWLoop(props) {
+    if (props) {
+        this.condition = props.condition;
+        this.block_scope = props.block_scope;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for do/while statements",
+    $propdoc: {
+        condition: "[AST_Node] the loop condition.  Should not be instanceof AST_Statement"
+    }
+}, AST_IterationStatement);
+
+var AST_Do = DEFNODE("Do", null, function AST_Do(props) {
+    if (props) {
+        this.condition = props.condition;
+        this.block_scope = props.block_scope;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `do` statement",
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.body._walk(visitor);
+            this.condition._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.condition);
+        push(this.body);
+    }
+}, AST_DWLoop);
+
+var AST_While = DEFNODE("While", null, function AST_While(props) {
+    if (props) {
+        this.condition = props.condition;
+        this.block_scope = props.block_scope;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `while` statement",
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.condition._walk(visitor);
+            this.body._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.body);
+        push(this.condition);
+    },
+}, AST_DWLoop);
+
+var AST_For = DEFNODE("For", "init condition step", function AST_For(props) {
+    if (props) {
+        this.init = props.init;
+        this.condition = props.condition;
+        this.step = props.step;
+        this.block_scope = props.block_scope;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `for` statement",
+    $propdoc: {
+        init: "[AST_Node?] the `for` initialization code, or null if empty",
+        condition: "[AST_Node?] the `for` termination clause, or null if empty",
+        step: "[AST_Node?] the `for` update clause, or null if empty"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            if (this.init) this.init._walk(visitor);
+            if (this.condition) this.condition._walk(visitor);
+            if (this.step) this.step._walk(visitor);
+            this.body._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.body);
+        if (this.step) push(this.step);
+        if (this.condition) push(this.condition);
+        if (this.init) push(this.init);
+    },
+}, AST_IterationStatement);
+
+var AST_ForIn = DEFNODE("ForIn", "init object", function AST_ForIn(props) {
+    if (props) {
+        this.init = props.init;
+        this.object = props.object;
+        this.block_scope = props.block_scope;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `for ... in` statement",
+    $propdoc: {
+        init: "[AST_Node] the `for/in` initialization code",
+        object: "[AST_Node] the object that we're looping through"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.init._walk(visitor);
+            this.object._walk(visitor);
+            this.body._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.body);
+        if (this.object) push(this.object);
+        if (this.init) push(this.init);
+    },
+}, AST_IterationStatement);
+
+var AST_ForOf = DEFNODE("ForOf", "await", function AST_ForOf(props) {
+    if (props) {
+        this.await = props.await;
+        this.init = props.init;
+        this.object = props.object;
+        this.block_scope = props.block_scope;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `for ... of` statement",
+}, AST_ForIn);
+
+var AST_With = DEFNODE("With", "expression", function AST_With(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `with` statement",
+    $propdoc: {
+        expression: "[AST_Node] the `with` expression"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+            this.body._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.body);
+        push(this.expression);
+    },
+}, AST_StatementWithBody);
+
+/* -----[ scope and functions ]----- */
+
+var AST_Scope = DEFNODE(
+    "Scope",
+    "variables uses_with uses_eval parent_scope enclosed cname",
+    function AST_Scope(props) {
+        if (props) {
+            this.variables = props.variables;
+            this.uses_with = props.uses_with;
+            this.uses_eval = props.uses_eval;
+            this.parent_scope = props.parent_scope;
+            this.enclosed = props.enclosed;
+            this.cname = props.cname;
+            this.body = props.body;
+            this.block_scope = props.block_scope;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "Base class for all statements introducing a lexical scope",
+        $propdoc: {
+            variables: "[Map/S] a map of name -> SymbolDef for all variables/functions defined in this scope",
+            uses_with: "[boolean/S] tells whether this scope uses the `with` statement",
+            uses_eval: "[boolean/S] tells whether this scope contains a direct call to the global `eval`",
+            parent_scope: "[AST_Scope?/S] link to the parent scope",
+            enclosed: "[SymbolDef*/S] a list of all symbol definitions that are accessed from this scope or any subscopes",
+            cname: "[integer/S] current index for mangling variables (used internally by the mangler)",
+        },
+        get_defun_scope: function() {
+            var self = this;
+            while (self.is_block_scope()) {
+                self = self.parent_scope;
+            }
+            return self;
+        },
+        clone: function(deep, toplevel) {
+            var node = this._clone(deep);
+            if (deep && this.variables && toplevel && !this._block_scope) {
+                node.figure_out_scope({}, {
+                    toplevel: toplevel,
+                    parent_scope: this.parent_scope
+                });
+            } else {
+                if (this.variables) node.variables = new Map(this.variables);
+                if (this.enclosed) node.enclosed = this.enclosed.slice();
+                if (this._block_scope) node._block_scope = this._block_scope;
+            }
+            return node;
+        },
+        pinned: function() {
+            return this.uses_eval || this.uses_with;
+        }
+    },
+    AST_Block
+);
+
+var AST_Toplevel = DEFNODE("Toplevel", "globals", function AST_Toplevel(props) {
+    if (props) {
+        this.globals = props.globals;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The toplevel scope",
+    $propdoc: {
+        globals: "[Map/S] a map of name -> SymbolDef for all undeclared names",
+    },
+    wrap_commonjs: function(name) {
+        var body = this.body;
+        var wrapped_tl = "(function(exports){'$ORIG';})(typeof " + name + "=='undefined'?(" + name + "={}):" + name + ");";
+        wrapped_tl = parse(wrapped_tl);
+        wrapped_tl = wrapped_tl.transform(new TreeTransformer(function(node) {
+            if (node instanceof AST_Directive && node.value == "$ORIG") {
+                return MAP.splice(body);
+            }
+        }));
+        return wrapped_tl;
+    },
+    wrap_enclose: function(args_values) {
+        if (typeof args_values != "string") args_values = "";
+        var index = args_values.indexOf(":");
+        if (index < 0) index = args_values.length;
+        var body = this.body;
+        return parse([
+            "(function(",
+            args_values.slice(0, index),
+            '){"$ORIG"})(',
+            args_values.slice(index + 1),
+            ")"
+        ].join("")).transform(new TreeTransformer(function(node) {
+            if (node instanceof AST_Directive && node.value == "$ORIG") {
+                return MAP.splice(body);
+            }
+        }));
+    }
+}, AST_Scope);
+
+var AST_Expansion = DEFNODE("Expansion", "expression", function AST_Expansion(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An expandible argument, such as ...rest, a splat, such as [1,2,...all], or an expansion in a variable declaration, such as var [first, ...rest] = list",
+    $propdoc: {
+        expression: "[AST_Node] the thing to be expanded"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression.walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.expression);
+    },
+});
+
+var AST_Lambda = DEFNODE(
+    "Lambda",
+    "name argnames uses_arguments is_generator async",
+    function AST_Lambda(props) {
+        if (props) {
+            this.name = props.name;
+            this.argnames = props.argnames;
+            this.uses_arguments = props.uses_arguments;
+            this.is_generator = props.is_generator;
+            this.async = props.async;
+            this.variables = props.variables;
+            this.uses_with = props.uses_with;
+            this.uses_eval = props.uses_eval;
+            this.parent_scope = props.parent_scope;
+            this.enclosed = props.enclosed;
+            this.cname = props.cname;
+            this.body = props.body;
+            this.block_scope = props.block_scope;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "Base class for functions",
+        $propdoc: {
+            name: "[AST_SymbolDeclaration?] the name of this function",
+            argnames: "[AST_SymbolFunarg|AST_Destructuring|AST_Expansion|AST_DefaultAssign*] array of function arguments, destructurings, or expanding arguments",
+            uses_arguments: "[boolean/S] tells whether this function accesses the arguments array",
+            is_generator: "[boolean] is this a generator method",
+            async: "[boolean] is this method async",
+        },
+        args_as_names: function () {
+            var out = [];
+            for (var i = 0; i < this.argnames.length; i++) {
+                if (this.argnames[i] instanceof AST_Destructuring) {
+                    out.push(...this.argnames[i].all_symbols());
+                } else {
+                    out.push(this.argnames[i]);
+                }
+            }
+            return out;
+        },
+        _walk: function(visitor) {
+            return visitor._visit(this, function() {
+                if (this.name) this.name._walk(visitor);
+                var argnames = this.argnames;
+                for (var i = 0, len = argnames.length; i < len; i++) {
+                    argnames[i]._walk(visitor);
+                }
+                walk_body(this, visitor);
+            });
+        },
+        _children_backwards(push) {
+            let i = this.body.length;
+            while (i--) push(this.body[i]);
+
+            i = this.argnames.length;
+            while (i--) push(this.argnames[i]);
+
+            if (this.name) push(this.name);
+        },
+        is_braceless() {
+            return this.body[0] instanceof AST_Return && this.body[0].value;
+        },
+        // Default args and expansion don't count, so .argnames.length doesn't cut it
+        length_property() {
+            let length = 0;
+
+            for (const arg of this.argnames) {
+                if (arg instanceof AST_SymbolFunarg || arg instanceof AST_Destructuring) {
+                    length++;
+                }
+            }
+
+            return length;
+        }
+    },
+    AST_Scope
+);
+
+var AST_Accessor = DEFNODE("Accessor", null, function AST_Accessor(props) {
+    if (props) {
+        this.name = props.name;
+        this.argnames = props.argnames;
+        this.uses_arguments = props.uses_arguments;
+        this.is_generator = props.is_generator;
+        this.async = props.async;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A setter/getter function.  The `name` property is always null."
+}, AST_Lambda);
+
+var AST_Function = DEFNODE("Function", null, function AST_Function(props) {
+    if (props) {
+        this.name = props.name;
+        this.argnames = props.argnames;
+        this.uses_arguments = props.uses_arguments;
+        this.is_generator = props.is_generator;
+        this.async = props.async;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A function expression"
+}, AST_Lambda);
+
+var AST_Arrow = DEFNODE("Arrow", null, function AST_Arrow(props) {
+    if (props) {
+        this.name = props.name;
+        this.argnames = props.argnames;
+        this.uses_arguments = props.uses_arguments;
+        this.is_generator = props.is_generator;
+        this.async = props.async;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An ES6 Arrow function ((a) => b)"
+}, AST_Lambda);
+
+var AST_Defun = DEFNODE("Defun", null, function AST_Defun(props) {
+    if (props) {
+        this.name = props.name;
+        this.argnames = props.argnames;
+        this.uses_arguments = props.uses_arguments;
+        this.is_generator = props.is_generator;
+        this.async = props.async;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A function definition"
+}, AST_Lambda);
+
+/* -----[ DESTRUCTURING ]----- */
+var AST_Destructuring = DEFNODE("Destructuring", "names is_array", function AST_Destructuring(props) {
+    if (props) {
+        this.names = props.names;
+        this.is_array = props.is_array;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A destructuring of several names. Used in destructuring assignment and with destructuring function argument names",
+    $propdoc: {
+        "names": "[AST_Node*] Array of properties or elements",
+        "is_array": "[Boolean] Whether the destructuring represents an object or array"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.names.forEach(function(name) {
+                name._walk(visitor);
+            });
+        });
+    },
+    _children_backwards(push) {
+        let i = this.names.length;
+        while (i--) push(this.names[i]);
+    },
+    all_symbols: function() {
+        var out = [];
+        walk(this, node => {
+            if (node instanceof AST_SymbolDeclaration) {
+                out.push(node);
+            }
+            if (node instanceof AST_Lambda) {
+                return true;
+            }
+        });
+        return out;
+    }
+});
+
+var AST_PrefixedTemplateString = DEFNODE(
+    "PrefixedTemplateString",
+    "template_string prefix",
+    function AST_PrefixedTemplateString(props) {
+        if (props) {
+            this.template_string = props.template_string;
+            this.prefix = props.prefix;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "A templatestring with a prefix, such as String.raw`foobarbaz`",
+        $propdoc: {
+            template_string: "[AST_TemplateString] The template string",
+            prefix: "[AST_Node] The prefix, which will get called."
+        },
+        _walk: function(visitor) {
+            return visitor._visit(this, function () {
+                this.prefix._walk(visitor);
+                this.template_string._walk(visitor);
+            });
+        },
+        _children_backwards(push) {
+            push(this.template_string);
+            push(this.prefix);
+        },
+    }
+);
+
+var AST_TemplateString = DEFNODE("TemplateString", "segments", function AST_TemplateString(props) {
+    if (props) {
+        this.segments = props.segments;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A template string literal",
+    $propdoc: {
+        segments: "[AST_Node*] One or more segments, starting with AST_TemplateSegment. AST_Node may follow AST_TemplateSegment, but each AST_Node must be followed by AST_TemplateSegment."
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.segments.forEach(function(seg) {
+                seg._walk(visitor);
+            });
+        });
+    },
+    _children_backwards(push) {
+        let i = this.segments.length;
+        while (i--) push(this.segments[i]);
+    }
+});
+
+var AST_TemplateSegment = DEFNODE("TemplateSegment", "value raw", function AST_TemplateSegment(props) {
+    if (props) {
+        this.value = props.value;
+        this.raw = props.raw;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A segment of a template string literal",
+    $propdoc: {
+        value: "Content of the segment",
+        raw: "Raw source of the segment",
+    }
+});
+
+/* -----[ JUMPS ]----- */
+
+var AST_Jump = DEFNODE("Jump", null, function AST_Jump(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for “jumps” (for now that's `return`, `throw`, `break` and `continue`)"
+}, AST_Statement);
+
+/** Base class for “exits” (`return` and `throw`) */
+var AST_Exit = DEFNODE("Exit", "value", function AST_Exit(props) {
+    if (props) {
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for “exits” (`return` and `throw`)",
+    $propdoc: {
+        value: "[AST_Node?] the value returned or thrown by this statement; could be null for AST_Return"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, this.value && function() {
+            this.value._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.value) push(this.value);
+    },
+}, AST_Jump);
+
+var AST_Return = DEFNODE("Return", null, function AST_Return(props) {
+    if (props) {
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `return` statement"
+}, AST_Exit);
+
+var AST_Throw = DEFNODE("Throw", null, function AST_Throw(props) {
+    if (props) {
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `throw` statement"
+}, AST_Exit);
+
+var AST_LoopControl = DEFNODE("LoopControl", "label", function AST_LoopControl(props) {
+    if (props) {
+        this.label = props.label;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for loop control statements (`break` and `continue`)",
+    $propdoc: {
+        label: "[AST_LabelRef?] the label, or null if none",
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, this.label && function() {
+            this.label._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.label) push(this.label);
+    },
+}, AST_Jump);
+
+var AST_Break = DEFNODE("Break", null, function AST_Break(props) {
+    if (props) {
+        this.label = props.label;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `break` statement"
+}, AST_LoopControl);
+
+var AST_Continue = DEFNODE("Continue", null, function AST_Continue(props) {
+    if (props) {
+        this.label = props.label;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `continue` statement"
+}, AST_LoopControl);
+
+var AST_Await = DEFNODE("Await", "expression", function AST_Await(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An `await` statement",
+    $propdoc: {
+        expression: "[AST_Node] the mandatory expression being awaited",
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.expression);
+    },
+});
+
+var AST_Yield = DEFNODE("Yield", "expression is_star", function AST_Yield(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.is_star = props.is_star;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `yield` statement",
+    $propdoc: {
+        expression: "[AST_Node?] the value returned or thrown by this statement; could be null (representing undefined) but only when is_star is set to false",
+        is_star: "[Boolean] Whether this is a yield or yield* statement"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, this.expression && function() {
+            this.expression._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.expression) push(this.expression);
+    }
+});
+
+/* -----[ IF ]----- */
+
+var AST_If = DEFNODE("If", "condition alternative", function AST_If(props) {
+    if (props) {
+        this.condition = props.condition;
+        this.alternative = props.alternative;
+        this.body = props.body;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `if` statement",
+    $propdoc: {
+        condition: "[AST_Node] the `if` condition",
+        alternative: "[AST_Statement?] the `else` part, or null if not present"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.condition._walk(visitor);
+            this.body._walk(visitor);
+            if (this.alternative) this.alternative._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.alternative) {
+            push(this.alternative);
+        }
+        push(this.body);
+        push(this.condition);
+    }
+}, AST_StatementWithBody);
+
+/* -----[ SWITCH ]----- */
+
+var AST_Switch = DEFNODE("Switch", "expression", function AST_Switch(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `switch` statement",
+    $propdoc: {
+        expression: "[AST_Node] the `switch` “discriminant”"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+            walk_body(this, visitor);
+        });
+    },
+    _children_backwards(push) {
+        let i = this.body.length;
+        while (i--) push(this.body[i]);
+        push(this.expression);
+    }
+}, AST_Block);
+
+var AST_SwitchBranch = DEFNODE("SwitchBranch", null, function AST_SwitchBranch(props) {
+    if (props) {
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for `switch` branches",
+}, AST_Block);
+
+var AST_Default = DEFNODE("Default", null, function AST_Default(props) {
+    if (props) {
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `default` switch branch",
+}, AST_SwitchBranch);
+
+var AST_Case = DEFNODE("Case", "expression", function AST_Case(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `case` switch branch",
+    $propdoc: {
+        expression: "[AST_Node] the `case` expression"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+            walk_body(this, visitor);
+        });
+    },
+    _children_backwards(push) {
+        let i = this.body.length;
+        while (i--) push(this.body[i]);
+        push(this.expression);
+    },
+}, AST_SwitchBranch);
+
+/* -----[ EXCEPTIONS ]----- */
+
+var AST_Try = DEFNODE("Try", "body bcatch bfinally", function AST_Try(props) {
+    if (props) {
+        this.body = props.body;
+        this.bcatch = props.bcatch;
+        this.bfinally = props.bfinally;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `try` statement",
+    $propdoc: {
+        body: "[AST_TryBlock] the try block",
+        bcatch: "[AST_Catch?] the catch block, or null if not present",
+        bfinally: "[AST_Finally?] the finally block, or null if not present"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.body._walk(visitor);
+            if (this.bcatch) this.bcatch._walk(visitor);
+            if (this.bfinally) this.bfinally._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.bfinally) push(this.bfinally);
+        if (this.bcatch) push(this.bcatch);
+        push(this.body);
+    },
+}, AST_Statement);
+
+var AST_TryBlock = DEFNODE("TryBlock", null, function AST_TryBlock(props) {
+    if (props) {
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `try` block of a try statement"
+}, AST_Block);
+
+var AST_Catch = DEFNODE("Catch", "argname", function AST_Catch(props) {
+    if (props) {
+        this.argname = props.argname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `catch` node; only makes sense as part of a `try` statement",
+    $propdoc: {
+        argname: "[AST_SymbolCatch|AST_Destructuring|AST_Expansion|AST_DefaultAssign] symbol for the exception"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            if (this.argname) this.argname._walk(visitor);
+            walk_body(this, visitor);
+        });
+    },
+    _children_backwards(push) {
+        let i = this.body.length;
+        while (i--) push(this.body[i]);
+        if (this.argname) push(this.argname);
+    },
+}, AST_Block);
+
+var AST_Finally = DEFNODE("Finally", null, function AST_Finally(props) {
+    if (props) {
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `finally` node; only makes sense as part of a `try` statement"
+}, AST_Block);
+
+/* -----[ VAR/CONST ]----- */
+
+var AST_DefinitionsLike = DEFNODE("DefinitionsLike", "definitions", function AST_DefinitionsLike(props) {
+    if (props) {
+        this.definitions = props.definitions;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for variable definitions and `using`",
+    $propdoc: {
+        definitions: "[AST_VarDef*|AST_UsingDef*] array of variable definitions"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            var definitions = this.definitions;
+            for (var i = 0, len = definitions.length; i < len; i++) {
+                definitions[i]._walk(visitor);
+            }
+        });
+    },
+    _children_backwards(push) {
+        let i = this.definitions.length;
+        while (i--) push(this.definitions[i]);
+    },
+}, AST_Statement);
+
+var AST_Definitions = DEFNODE("Definitions", null, function AST_Definitions(props) {
+    if (props) {
+        this.definitions = props.definitions;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for `var` or `const` nodes (variable declarations/initializations)",
+}, AST_DefinitionsLike);
+
+var AST_Var = DEFNODE("Var", null, function AST_Var(props) {
+    if (props) {
+        this.definitions = props.definitions;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `var` statement"
+}, AST_Definitions);
+
+var AST_Let = DEFNODE("Let", null, function AST_Let(props) {
+    if (props) {
+        this.definitions = props.definitions;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `let` statement"
+}, AST_Definitions);
+
+var AST_Const = DEFNODE("Const", null, function AST_Const(props) {
+    if (props) {
+        this.definitions = props.definitions;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `const` statement"
+}, AST_Definitions);
+
+var AST_Using = DEFNODE("Using", "await", function AST_Using(props) {
+    if (props) {
+        this.await = props.await;
+        this.definitions = props.definitions;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `using` statement",
+    $propdoc: {
+        await: "[boolean] Whether it's `await using`"
+    },
+}, AST_DefinitionsLike);
+
+var AST_VarDefLike = DEFNODE("VarDefLike", "name value", function AST_VarDefLike(props) {
+    if (props) {
+        this.name = props.name;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A name=value pair in a variable definition statement or `using`",
+    $propdoc: {
+        name: "[AST_Destructuring|AST_SymbolDeclaration] name of the variable",
+        value: "[AST_Node?] initializer, or null of there's no initializer"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.name._walk(visitor);
+            if (this.value) this.value._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.value) push(this.value);
+        push(this.name);
+    },
+    declarations_as_names() {
+        if (this.name instanceof AST_SymbolDeclaration) {
+            return [this.name];
+        } else {
+            return this.name.all_symbols();
+        }
+    }
+});
+
+var AST_VarDef = DEFNODE("VarDef", null, function AST_VarDef(props) {
+    if (props) {
+        this.name = props.name;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A variable declaration; only appears in a AST_Definitions node",
+}, AST_VarDefLike);
+
+var AST_UsingDef = DEFNODE("UsingDef", null, function AST_UsingDef(props) {
+    if (props) {
+        this.name = props.name;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Like VarDef but specific to AST_Using",
+}, AST_VarDefLike);
+
+var AST_NameMapping = DEFNODE("NameMapping", "foreign_name name", function AST_NameMapping(props) {
+    if (props) {
+        this.foreign_name = props.foreign_name;
+        this.name = props.name;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The part of the export/import statement that declare names from a module.",
+    $propdoc: {
+        foreign_name: "[AST_SymbolExportForeign|AST_SymbolImportForeign] The name being exported/imported (as specified in the module)",
+        name: "[AST_SymbolExport|AST_SymbolImport] The name as it is visible to this module."
+    },
+    _walk: function (visitor) {
+        return visitor._visit(this, function() {
+            this.foreign_name._walk(visitor);
+            this.name._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.name);
+        push(this.foreign_name);
+    },
+});
+
+var AST_Import = DEFNODE(
+    "Import",
+    "phase imported_name imported_names module_name attributes",
+    function AST_Import(props) {
+        if (props) {
+            this.phase = props.phase;
+            this.imported_name = props.imported_name;
+            this.imported_names = props.imported_names;
+            this.module_name = props.module_name;
+            this.attributes = props.attributes;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "An `import` statement",
+        $propdoc: {
+            phase: "[string?] Phase keyword: 'source', 'defer', or null.",
+            imported_name: "[AST_SymbolImport] The name of the variable holding the module's default export.",
+            imported_names: "[AST_NameMapping*] The names of non-default imported variables",
+            module_name: "[AST_String] String literal describing where this module came from",
+            attributes: "[AST_Object?] The import attributes (with {...})"
+        },
+        _walk: function(visitor) {
+            return visitor._visit(this, function() {
+                if (this.imported_name) {
+                    this.imported_name._walk(visitor);
+                }
+                if (this.imported_names) {
+                    this.imported_names.forEach(function(name_import) {
+                        name_import._walk(visitor);
+                    });
+                }
+                this.module_name._walk(visitor);
+            });
+        },
+        _children_backwards(push) {
+            push(this.module_name);
+            if (this.imported_names) {
+                let i = this.imported_names.length;
+                while (i--) push(this.imported_names[i]);
+            }
+            if (this.imported_name) push(this.imported_name);
+        },
+    }
+);
+
+var AST_ImportMeta = DEFNODE("ImportMeta", null, function AST_ImportMeta(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A reference to import.meta",
+});
+
+var AST_DynamicImport = DEFNODE(
+    "DynamicImport",
+    "phase args",
+    function AST_DynamicImport(props) {
+        if (props) {
+            this.phase = props.phase;
+            this.args = props.args;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "A phased dynamic import expression: `import.source(specifier [, options])` or `import.defer(specifier [, options])`. Plain `import(x)` continues to be parsed as an AST_Call with a synthetic `import` SymbolRef callee.",
+        $propdoc: {
+            phase: "[string] Phase keyword ('source' or 'defer').",
+            args: "[AST_Node*] specifier followed by optional options argument"
+        },
+        _walk: function(visitor) {
+            return visitor._visit(this, function() {
+                var args = this.args;
+                for (var i = 0, len = args.length; i < len; i++) {
+                    args[i]._walk(visitor);
+                }
+            });
+        },
+        _children_backwards(push) {
+            let i = this.args.length;
+            while (i--) push(this.args[i]);
+        },
+    }
+);
+
+var AST_Export = DEFNODE(
+    "Export",
+    "exported_definition exported_value is_default exported_names module_name attributes",
+    function AST_Export(props) {
+        if (props) {
+            this.exported_definition = props.exported_definition;
+            this.exported_value = props.exported_value;
+            this.is_default = props.is_default;
+            this.exported_names = props.exported_names;
+            this.module_name = props.module_name;
+            this.attributes = props.attributes;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "An `export` statement",
+        $propdoc: {
+            exported_definition: "[AST_Defun|AST_Definitions|AST_DefClass?] An exported definition",
+            exported_value: "[AST_Node?] An exported value",
+            exported_names: "[AST_NameMapping*?] List of exported names",
+            module_name: "[AST_String?] Name of the file to load exports from",
+            is_default: "[Boolean] Whether this is the default exported value of this module",
+            attributes: "[AST_Object?] The import attributes"
+        },
+        _walk: function (visitor) {
+            return visitor._visit(this, function () {
+                if (this.exported_definition) {
+                    this.exported_definition._walk(visitor);
+                }
+                if (this.exported_value) {
+                    this.exported_value._walk(visitor);
+                }
+                if (this.exported_names) {
+                    this.exported_names.forEach(function(name_export) {
+                        name_export._walk(visitor);
+                    });
+                }
+                if (this.module_name) {
+                    this.module_name._walk(visitor);
+                }
+            });
+        },
+        _children_backwards(push) {
+            if (this.module_name) push(this.module_name);
+            if (this.exported_names) {
+                let i = this.exported_names.length;
+                while (i--) push(this.exported_names[i]);
+            }
+            if (this.exported_value) push(this.exported_value);
+            if (this.exported_definition) push(this.exported_definition);
+        }
+    },
+    AST_Statement
+);
+
+/* -----[ OTHER ]----- */
+
+var AST_Call = DEFNODE(
+    "Call",
+    "expression args optional _annotations",
+    function AST_Call(props) {
+        if (props) {
+            this.expression = props.expression;
+            this.args = props.args;
+            this.optional = props.optional;
+            this._annotations = props._annotations;
+            this.start = props.start;
+            this.end = props.end;
+            this.initialize();
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "A function call expression",
+        $propdoc: {
+            expression: "[AST_Node] expression to invoke as function",
+            args: "[AST_Node*] array of arguments",
+            optional: "[boolean] whether this is an optional call (IE ?.() )",
+            _annotations: "[number] bitfield containing information about the call"
+        },
+        initialize() {
+            if (this._annotations == null) this._annotations = 0;
+        },
+        _walk(visitor) {
+            return visitor._visit(this, function() {
+                var args = this.args;
+                for (var i = 0, len = args.length; i < len; i++) {
+                    args[i]._walk(visitor);
+                }
+                this.expression._walk(visitor);  // TODO why do we need to crawl this last?
+            });
+        },
+        _children_backwards(push) {
+            let i = this.args.length;
+            while (i--) push(this.args[i]);
+            push(this.expression);
+        },
+    }
+);
+
+var AST_New = DEFNODE("New", null, function AST_New(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.args = props.args;
+        this.optional = props.optional;
+        this._annotations = props._annotations;
+        this.start = props.start;
+        this.end = props.end;
+        this.initialize();
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An object instantiation.  Derives from a function call since it has exactly the same properties"
+}, AST_Call);
+
+var AST_Sequence = DEFNODE("Sequence", "expressions", function AST_Sequence(props) {
+    if (props) {
+        this.expressions = props.expressions;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A sequence expression (comma-separated expressions)",
+    $propdoc: {
+        expressions: "[AST_Node*] array of expressions (at least two)"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expressions.forEach(function(node) {
+                node._walk(visitor);
+            });
+        });
+    },
+    _children_backwards(push) {
+        let i = this.expressions.length;
+        while (i--) push(this.expressions[i]);
+    },
+});
+
+var AST_PropAccess = DEFNODE(
+    "PropAccess",
+    "expression property optional",
+    function AST_PropAccess(props) {
+        if (props) {
+            this.expression = props.expression;
+            this.property = props.property;
+            this.optional = props.optional;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "Base class for property access expressions, i.e. `a.foo` or `a[\"foo\"]`",
+        $propdoc: {
+            expression: "[AST_Node] the “container” expression",
+            property: "[AST_Node|string] the property to access.  For AST_Dot & AST_DotHash this is always a plain string, while for AST_Sub it's an arbitrary AST_Node",
+
+            optional: "[boolean] whether this is an optional property access (IE ?.)"
+        }
+    }
+);
+
+var AST_Dot = DEFNODE("Dot", "quote", function AST_Dot(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.expression = props.expression;
+        this.property = props.property;
+        this.optional = props.optional;
+        this._annotations = props._annotations;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A dotted property access expression",
+    $propdoc: {
+        quote: "[string] the original quote character when transformed from AST_Sub",
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.expression);
+    },
+}, AST_PropAccess);
+
+var AST_DotHash = DEFNODE("DotHash", "", function AST_DotHash(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.property = props.property;
+        this.optional = props.optional;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A dotted property access to a private property",
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.expression);
+    },
+}, AST_PropAccess);
+
+var AST_Sub = DEFNODE("Sub", null, function AST_Sub(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.property = props.property;
+        this.optional = props.optional;
+        this._annotations = props._annotations;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Index-style property access, i.e. `a[\"foo\"]`",
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+            this.property._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.property);
+        push(this.expression);
+    },
+}, AST_PropAccess);
+
+var AST_Chain = DEFNODE("Chain", "expression", function AST_Chain(props) {
+    if (props) {
+        this.expression = props.expression;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A chain expression like a?.b?.(c)?.[d]",
+    $propdoc: {
+        expression: "[AST_Call|AST_Dot|AST_DotHash|AST_Sub] chain element."
+    },
+    _walk: function (visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.expression);
+    },
+});
+
+var AST_Unary = DEFNODE("Unary", "operator expression", function AST_Unary(props) {
+    if (props) {
+        this.operator = props.operator;
+        this.expression = props.expression;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for unary expressions",
+    $propdoc: {
+        operator: "[string] the operator",
+        expression: "[AST_Node] expression that this unary operator applies to"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.expression._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.expression);
+    },
+});
+
+var AST_UnaryPrefix = DEFNODE("UnaryPrefix", null, function AST_UnaryPrefix(props) {
+    if (props) {
+        this.operator = props.operator;
+        this.expression = props.expression;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Unary prefix expression, i.e. `typeof i` or `++i`"
+}, AST_Unary);
+
+var AST_UnaryPostfix = DEFNODE("UnaryPostfix", null, function AST_UnaryPostfix(props) {
+    if (props) {
+        this.operator = props.operator;
+        this.expression = props.expression;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Unary postfix expression, i.e. `i++`"
+}, AST_Unary);
+
+var AST_Binary = DEFNODE("Binary", "operator left right", function AST_Binary(props) {
+    if (props) {
+        this.operator = props.operator;
+        this.left = props.left;
+        this.right = props.right;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Binary expression, i.e. `a + b`",
+    $propdoc: {
+        left: "[AST_Node] left-hand side expression",
+        operator: "[string] the operator",
+        right: "[AST_Node] right-hand side expression"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.left._walk(visitor);
+            this.right._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.right);
+        push(this.left);
+    },
+});
+
+var AST_Conditional = DEFNODE(
+    "Conditional",
+    "condition consequent alternative",
+    function AST_Conditional(props) {
+        if (props) {
+            this.condition = props.condition;
+            this.consequent = props.consequent;
+            this.alternative = props.alternative;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "Conditional expression using the ternary operator, i.e. `a ? b : c`",
+        $propdoc: {
+            condition: "[AST_Node]",
+            consequent: "[AST_Node]",
+            alternative: "[AST_Node]"
+        },
+        _walk: function(visitor) {
+            return visitor._visit(this, function() {
+                this.condition._walk(visitor);
+                this.consequent._walk(visitor);
+                this.alternative._walk(visitor);
+            });
+        },
+        _children_backwards(push) {
+            push(this.alternative);
+            push(this.consequent);
+            push(this.condition);
+        },
+    }
+);
+
+var AST_Assign = DEFNODE("Assign", "logical", function AST_Assign(props) {
+    if (props) {
+        this.logical = props.logical;
+        this.operator = props.operator;
+        this.left = props.left;
+        this.right = props.right;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An assignment expression — `a = b + 5`",
+    $propdoc: {
+        logical: "Whether it's a logical assignment"
+    }
+}, AST_Binary);
+
+var AST_DefaultAssign = DEFNODE("DefaultAssign", null, function AST_DefaultAssign(props) {
+    if (props) {
+        this.operator = props.operator;
+        this.left = props.left;
+        this.right = props.right;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A default assignment expression like in `(a = 3) => a`"
+}, AST_Binary);
+
+/* -----[ LITERALS ]----- */
+
+var AST_Array = DEFNODE("Array", "elements", function AST_Array(props) {
+    if (props) {
+        this.elements = props.elements;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An array literal",
+    $propdoc: {
+        elements: "[AST_Node*] array of elements"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            var elements = this.elements;
+            for (var i = 0, len = elements.length; i < len; i++) {
+                elements[i]._walk(visitor);
+            }
+        });
+    },
+    _children_backwards(push) {
+        let i = this.elements.length;
+        while (i--) push(this.elements[i]);
+    },
+});
+
+var AST_Object = DEFNODE("Object", "properties", function AST_Object(props) {
+    if (props) {
+        this.properties = props.properties;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An object literal",
+    $propdoc: {
+        properties: "[AST_ObjectProperty*] array of properties"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            var properties = this.properties;
+            for (var i = 0, len = properties.length; i < len; i++) {
+                properties[i]._walk(visitor);
+            }
+        });
+    },
+    _children_backwards(push) {
+        let i = this.properties.length;
+        while (i--) push(this.properties[i]);
+    },
+});
+
+/* -----[ OBJECT/CLASS PROPERTIES ]----- */
+
+/**
+ * Everything inside the curly braces of an object/class is a subclass of AST_ObjectProperty, except for AST_ClassStaticBlock.
+ **/
+var AST_ObjectProperty = DEFNODE("ObjectProperty", "key value", function AST_ObjectProperty(props) {
+    if (props) {
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+        this._annotations = props._annotations;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for literal object properties",
+    $propdoc: {
+        key: "[string|AST_Node] property name. For ObjectKeyVal this is a string. For getters, setters and computed property this is an AST_Node.",
+        value: "[AST_Node] property value.  For getters, setters and methods this is an AST_Accessor."
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            if (this.key instanceof AST_Node)
+                this.key._walk(visitor);
+            this.value._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.value);
+        if (this.key instanceof AST_Node) push(this.key);
+    },
+});
+
+var AST_ObjectKeyVal = DEFNODE("ObjectKeyVal", "quote", function AST_ObjectKeyVal(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+        this._annotations = props._annotations;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A key: value object property",
+    $propdoc: {
+        quote: "[string] the original quote character"
+    },
+    computed_key() {
+        return this.key instanceof AST_Node;
+    }
+}, AST_ObjectProperty);
+
+var AST_PrivateSetter = DEFNODE("PrivateSetter", "static", function AST_PrivateSetter(props) {
+    if (props) {
+        this.static = props.static;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $propdoc: {
+        static: "[boolean] whether this is a static private setter"
+    },
+    $documentation: "A private setter property",
+    computed_key() {
+        return false;
+    }
+}, AST_ObjectProperty);
+
+var AST_PrivateGetter = DEFNODE("PrivateGetter", "static", function AST_PrivateGetter(props) {
+    if (props) {
+        this.static = props.static;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $propdoc: {
+        static: "[boolean] whether this is a static private getter"
+    },
+    $documentation: "A private getter property",
+    computed_key() {
+        return false;
+    }
+}, AST_ObjectProperty);
+
+var AST_ObjectSetter = DEFNODE("ObjectSetter", "quote static", function AST_ObjectSetter(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.static = props.static;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+        this._annotations = props._annotations;
+    }
+
+    this.flags = 0;
+}, {
+    $propdoc: {
+        quote: "[string|undefined] the original quote character, if any",
+        static: "[boolean] whether this is a static setter (classes only)"
+    },
+    $documentation: "An object setter property",
+    computed_key() {
+        return !(this.key instanceof AST_SymbolMethod);
+    }
+}, AST_ObjectProperty);
+
+var AST_ObjectGetter = DEFNODE("ObjectGetter", "quote static", function AST_ObjectGetter(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.static = props.static;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+        this._annotations = props._annotations;
+    }
+
+    this.flags = 0;
+}, {
+    $propdoc: {
+        quote: "[string|undefined] the original quote character, if any",
+        static: "[boolean] whether this is a static getter (classes only)"
+    },
+    $documentation: "An object getter property",
+    computed_key() {
+        return !(this.key instanceof AST_SymbolMethod);
+    }
+}, AST_ObjectProperty);
+
+var AST_ConciseMethod = DEFNODE("ConciseMethod", "quote static", function AST_ConciseMethod(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.static = props.static;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+        this._annotations = props._annotations;
+    }
+
+    this.flags = 0;
+}, {
+    $propdoc: {
+        quote: "[string|undefined] the original quote character, if any",
+        static: "[boolean] is this method static (classes only)",
+    },
+    $documentation: "An ES6 concise method inside an object or class",
+    computed_key() {
+        return !(this.key instanceof AST_SymbolMethod);
+    }
+}, AST_ObjectProperty);
+
+var AST_PrivateMethod = DEFNODE("PrivateMethod", "static", function AST_PrivateMethod(props) {
+    if (props) {
+        this.static = props.static;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A private class method inside a class",
+    $propdoc: {
+        static: "[boolean] is this a static private method",
+    },
+    computed_key() {
+        return false;
+    },
+}, AST_ObjectProperty);
+
+var AST_Class = DEFNODE("Class", "name extends properties", function AST_Class(props) {
+    if (props) {
+        this.name = props.name;
+        this.extends = props.extends;
+        this.properties = props.properties;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $propdoc: {
+        name: "[AST_SymbolClass|AST_SymbolDefClass?] optional class name.",
+        extends: "[AST_Node]? optional parent class",
+        properties: "[AST_ObjectProperty|AST_ClassStaticBlock]* array of properties or static blocks"
+    },
+    $documentation: "An ES6 class",
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            if (this.name) {
+                this.name._walk(visitor);
+            }
+            if (this.extends) {
+                this.extends._walk(visitor);
+            }
+            this.properties.forEach((prop) => prop._walk(visitor));
+        });
+    },
+    _children_backwards(push) {
+        let i = this.properties.length;
+        while (i--) push(this.properties[i]);
+        if (this.extends) push(this.extends);
+        if (this.name) push(this.name);
+    },
+    /** go through the bits that are executed instantly, not when the class is `new`'d. Doesn't walk the name. */
+    visit_nondeferred_class_parts(visitor) {
+        if (this.extends) {
+            this.extends._walk(visitor);
+        }
+        this.properties.forEach((prop) => {
+            if (prop instanceof AST_ClassStaticBlock) {
+                prop._walk(visitor);
+                return;
+            }
+            if (prop.computed_key()) {
+                visitor.push(prop);
+                prop.key._walk(visitor);
+                visitor.pop();
+            }
+            if (
+                prop instanceof AST_ClassPrivateProperty && prop.static && prop.value
+                || prop instanceof AST_ClassProperty && prop.static && prop.value
+            ) {
+                visitor.push(prop);
+                prop.value._walk(visitor);
+                visitor.pop();
+            }
+        });
+    },
+    /** go through the bits that are executed later, when the class is `new`'d or a static method is called */
+    visit_deferred_class_parts(visitor) {
+        this.properties.forEach((prop) => {
+            if (
+                prop instanceof AST_ConciseMethod
+                || prop instanceof AST_PrivateMethod
+            ) {
+                prop.walk(visitor);
+            } else if (
+                prop instanceof AST_ClassProperty && !prop.static && prop.value
+                || prop instanceof AST_ClassPrivateProperty && !prop.static && prop.value
+            ) {
+                visitor.push(prop);
+                prop.value._walk(visitor);
+                visitor.pop();
+            }
+        });
+    },
+    is_self_referential: function() {
+        const this_id = this.name && this.name.definition().id;
+        let found = false;
+        let class_this = true;
+        this.visit_nondeferred_class_parts(new TreeWalker((node, descend) => {
+            if (found) return true;
+            if (node instanceof AST_This) return (found = class_this);
+            if (node instanceof AST_SymbolRef) return (found = node.definition().id === this_id);
+            if (node instanceof AST_Lambda && !(node instanceof AST_Arrow)) {
+                const class_this_save = class_this;
+                class_this = false;
+                descend();
+                class_this = class_this_save;
+                return true;
+            }
+        }));
+        return found;
+    },
+}, AST_Scope /* TODO a class might have a scope but it's not a scope */);
+
+var AST_ClassProperty = DEFNODE("ClassProperty", "static quote", function AST_ClassProperty(props) {
+    if (props) {
+        this.static = props.static;
+        this.quote = props.quote;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+        this._annotations = props._annotations;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A class property",
+    $propdoc: {
+        static: "[boolean] whether this is a static key",
+        quote: "[string] which quote is being used"
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            if (this.key instanceof AST_Node)
+                this.key._walk(visitor);
+            if (this.value instanceof AST_Node)
+                this.value._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.value instanceof AST_Node) push(this.value);
+        if (this.key instanceof AST_Node) push(this.key);
+    },
+    computed_key() {
+        return !(this.key instanceof AST_SymbolClassProperty);
+    }
+}, AST_ObjectProperty);
+
+var AST_ClassPrivateProperty = DEFNODE("ClassPrivateProperty", "", function AST_ClassPrivateProperty(props) {
+    if (props) {
+        this.static = props.static;
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A class property for a private property",
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            if (this.value instanceof AST_Node)
+                this.value._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        if (this.value instanceof AST_Node) push(this.value);
+    },
+    computed_key() {
+        return false;
+    },
+}, AST_ObjectProperty);
+
+var AST_PrivateIn = DEFNODE("PrivateIn", "key value", function AST_PrivateIn(props) {
+    if (props) {
+        this.key = props.key;
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "An `in` binop when the key is private, eg #x in this",
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            this.key._walk(visitor);
+            this.value._walk(visitor);
+        });
+    },
+    _children_backwards(push) {
+        push(this.value);
+        push(this.key);
+    },
+});
+
+var AST_DefClass = DEFNODE("DefClass", null, function AST_DefClass(props) {
+    if (props) {
+        this.name = props.name;
+        this.extends = props.extends;
+        this.properties = props.properties;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A class definition",
+}, AST_Class);
+
+var AST_ClassStaticBlock = DEFNODE("ClassStaticBlock", "body block_scope", function AST_ClassStaticBlock (props) {
+    this.body = props.body;
+    this.block_scope = props.block_scope;
+    this.start = props.start;
+    this.end = props.end;
+}, {
+    $documentation: "A block containing statements to be executed in the context of the class",
+    $propdoc: {
+        body: "[AST_Statement*] an array of statements",
+    },
+    _walk: function(visitor) {
+        return visitor._visit(this, function() {
+            walk_body(this, visitor);
+        });
+    },
+    _children_backwards(push) {
+        let i = this.body.length;
+        while (i--) push(this.body[i]);
+    },
+    clone: clone_block_scope,
+    computed_key() {
+        return false;
+    },
+}, AST_Scope);
+
+var AST_ClassExpression = DEFNODE("ClassExpression", null, function AST_ClassExpression(props) {
+    if (props) {
+        this.name = props.name;
+        this.extends = props.extends;
+        this.properties = props.properties;
+        this.variables = props.variables;
+        this.uses_with = props.uses_with;
+        this.uses_eval = props.uses_eval;
+        this.parent_scope = props.parent_scope;
+        this.enclosed = props.enclosed;
+        this.cname = props.cname;
+        this.body = props.body;
+        this.block_scope = props.block_scope;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A class expression."
+}, AST_Class);
+
+var AST_Symbol = DEFNODE("Symbol", "scope name thedef", function AST_Symbol(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $propdoc: {
+        name: "[string] name of this symbol",
+        scope: "[AST_Scope/S] the current scope (not necessarily the definition scope)",
+        thedef: "[SymbolDef/S] the definition of this symbol"
+    },
+    $documentation: "Base class for all symbols"
+});
+
+var AST_NewTarget = DEFNODE("NewTarget", null, function AST_NewTarget(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A reference to new.target"
+});
+
+var AST_SymbolDeclaration = DEFNODE("SymbolDeclaration", "init", function AST_SymbolDeclaration(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A declaration symbol (symbol in var/const, function name or argument, symbol in catch)",
+}, AST_Symbol);
+
+var AST_SymbolVar = DEFNODE("SymbolVar", null, function AST_SymbolVar(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol defining a variable",
+}, AST_SymbolDeclaration);
+
+var AST_SymbolBlockDeclaration = DEFNODE(
+    "SymbolBlockDeclaration",
+    null,
+    function AST_SymbolBlockDeclaration(props) {
+        if (props) {
+            this.init = props.init;
+            this.scope = props.scope;
+            this.name = props.name;
+            this.thedef = props.thedef;
+            this.start = props.start;
+            this.end = props.end;
+        }
+
+        this.flags = 0;
+    },
+    {
+        $documentation: "Base class for block-scoped declaration symbols"
+    },
+    AST_SymbolDeclaration
+);
+
+var AST_SymbolConst = DEFNODE("SymbolConst", null, function AST_SymbolConst(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A constant declaration"
+}, AST_SymbolBlockDeclaration);
+
+var AST_SymbolUsing = DEFNODE("SymbolUsing", null, function AST_SymbolUsing(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A `using` declaration"
+}, AST_SymbolBlockDeclaration);
+
+var AST_SymbolLet = DEFNODE("SymbolLet", null, function AST_SymbolLet(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A block-scoped `let` declaration"
+}, AST_SymbolBlockDeclaration);
+
+var AST_SymbolFunarg = DEFNODE("SymbolFunarg", null, function AST_SymbolFunarg(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol naming a function argument",
+}, AST_SymbolVar);
+
+var AST_SymbolDefun = DEFNODE("SymbolDefun", null, function AST_SymbolDefun(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol defining a function",
+}, AST_SymbolDeclaration);
+
+var AST_SymbolMethod = DEFNODE("SymbolMethod", null, function AST_SymbolMethod(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol in an object defining a method",
+}, AST_Symbol);
+
+var AST_SymbolClassProperty = DEFNODE("SymbolClassProperty", null, function AST_SymbolClassProperty(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol for a class property",
+}, AST_Symbol);
+
+var AST_SymbolLambda = DEFNODE("SymbolLambda", null, function AST_SymbolLambda(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol naming a function expression",
+}, AST_SymbolDeclaration);
+
+var AST_SymbolDefClass = DEFNODE("SymbolDefClass", null, function AST_SymbolDefClass(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol naming a class's name in a class declaration. Lexically scoped to its containing scope, and accessible within the class."
+}, AST_SymbolBlockDeclaration);
+
+var AST_SymbolClass = DEFNODE("SymbolClass", null, function AST_SymbolClass(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol naming a class's name. Lexically scoped to the class."
+}, AST_SymbolDeclaration);
+
+var AST_SymbolCatch = DEFNODE("SymbolCatch", null, function AST_SymbolCatch(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol naming the exception in catch",
+}, AST_SymbolBlockDeclaration);
+
+var AST_SymbolImport = DEFNODE("SymbolImport", null, function AST_SymbolImport(props) {
+    if (props) {
+        this.init = props.init;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol referring to an imported name",
+}, AST_SymbolBlockDeclaration);
+
+var AST_SymbolImportForeign = DEFNODE("SymbolImportForeign", "quote", function AST_SymbolImportForeign(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A symbol imported from a module, but it is defined in the other module, and its real name is irrelevant for this module's purposes",
+}, AST_Symbol);
+
+var AST_Label = DEFNODE("Label", "references", function AST_Label(props) {
+    if (props) {
+        this.references = props.references;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+        this.initialize();
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol naming a label (declaration)",
+    $propdoc: {
+        references: "[AST_LoopControl*] a list of nodes referring to this label"
+    },
+    initialize: function() {
+        this.references = [];
+        this.thedef = this;
+    }
+}, AST_Symbol);
+
+var AST_SymbolRef = DEFNODE("SymbolRef", null, function AST_SymbolRef(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Reference to some symbol (not definition/declaration)",
+}, AST_Symbol);
+
+var AST_SymbolExport = DEFNODE("SymbolExport", "quote", function AST_SymbolExport(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Symbol referring to a name to export",
+}, AST_SymbolRef);
+
+var AST_SymbolExportForeign = DEFNODE("SymbolExportForeign", "quote", function AST_SymbolExportForeign(props) {
+    if (props) {
+        this.quote = props.quote;
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A symbol exported from this module, but it is used in the other module, and its real name is irrelevant for this module's purposes",
+}, AST_Symbol);
+
+var AST_LabelRef = DEFNODE("LabelRef", null, function AST_LabelRef(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Reference to a label symbol",
+}, AST_Symbol);
+
+var AST_SymbolPrivateProperty = DEFNODE("SymbolPrivateProperty", null, function AST_SymbolPrivateProperty(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A symbol that refers to a private property",
+}, AST_Symbol);
+
+var AST_This = DEFNODE("This", null, function AST_This(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `this` symbol",
+}, AST_Symbol);
+
+var AST_Super = DEFNODE("Super", null, function AST_Super(props) {
+    if (props) {
+        this.scope = props.scope;
+        this.name = props.name;
+        this.thedef = props.thedef;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `super` symbol",
+}, AST_This);
+
+var AST_Constant = DEFNODE("Constant", null, function AST_Constant(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for all constants",
+    getValue: function() {
+        return this.value;
+    }
+});
+
+var AST_String = DEFNODE("String", "value quote", function AST_String(props) {
+    if (props) {
+        this.value = props.value;
+        this.quote = props.quote;
+        this.start = props.start;
+        this.end = props.end;
+        this._annotations = props._annotations;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A string literal",
+    $propdoc: {
+        value: "[string] the contents of this string",
+        quote: "[string] the original quote character"
+    }
+}, AST_Constant);
+
+var AST_Number = DEFNODE("Number", "value raw", function AST_Number(props) {
+    if (props) {
+        this.value = props.value;
+        this.raw = props.raw;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A number literal",
+    $propdoc: {
+        value: "[number] the numeric value",
+        raw: "[string] numeric value as string"
+    }
+}, AST_Constant);
+
+var AST_BigInt = DEFNODE("BigInt", "value raw", function AST_BigInt(props) {
+    if (props) {
+        this.value = props.value;
+        this.raw = props.raw;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A big int literal",
+    $propdoc: {
+        value: "[string] big int value, represented as a string",
+        raw: "[string] the original format preserved"
+    }
+}, AST_Constant);
+
+var AST_RegExp = DEFNODE("RegExp", "value", function AST_RegExp(props) {
+    if (props) {
+        this.value = props.value;
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A regexp literal",
+    $propdoc: {
+        value: "[RegExp] the actual regexp",
+    }
+}, AST_Constant);
+
+var AST_Atom = DEFNODE("Atom", null, function AST_Atom(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for atoms",
+}, AST_Constant);
+
+var AST_Null = DEFNODE("Null", null, function AST_Null(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `null` atom",
+    value: null
+}, AST_Atom);
+
+var AST_NaN = DEFNODE("NaN", null, function AST_NaN(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The impossible value",
+    value: 0/0
+}, AST_Atom);
+
+var AST_Undefined = DEFNODE("Undefined", null, function AST_Undefined(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `undefined` value",
+    value: (function() {}())
+}, AST_Atom);
+
+var AST_Hole = DEFNODE("Hole", null, function AST_Hole(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "A hole in an array",
+    value: (function() {}())
+}, AST_Atom);
+
+var AST_Infinity = DEFNODE("Infinity", null, function AST_Infinity(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `Infinity` value",
+    value: 1/0
+}, AST_Atom);
+
+var AST_Boolean = DEFNODE("Boolean", null, function AST_Boolean(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "Base class for booleans",
+}, AST_Atom);
+
+var AST_False = DEFNODE("False", null, function AST_False(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `false` atom",
+    value: false
+}, AST_Boolean);
+
+var AST_True = DEFNODE("True", null, function AST_True(props) {
+    if (props) {
+        this.start = props.start;
+        this.end = props.end;
+    }
+
+    this.flags = 0;
+}, {
+    $documentation: "The `true` atom",
+    value: true
+}, AST_Boolean);
+
+/* -----[ Walk function ]---- */
+
+/**
+ * Walk nodes in depth-first search fashion.
+ * Callback can return `walk_abort` symbol to stop iteration.
+ * It can also return `true` to stop iteration just for child nodes.
+ * Iteration can be stopped and continued by passing the `to_visit` argument,
+ * which is given to the callback in the second argument.
+ **/
+function walk(node, cb, to_visit = [node]) {
+    const push = to_visit.push.bind(to_visit);
+    while (to_visit.length) {
+        const node = to_visit.pop();
+        const ret = cb(node, to_visit);
+
+        if (ret) {
+            if (ret === walk_abort) return true;
+            continue;
+        }
+
+        node._children_backwards(push);
+    }
+    return false;
+}
+
+/**
+ * Walks an AST node and its children.
+ *
+ * {cb} can return `walk_abort` to interrupt the walk.
+ *
+ * @param node
+ * @param cb {(node, info: { parent: (nth) => any }) => (boolean | undefined)}
+ *
+ * @returns {boolean} whether the walk was aborted
+ *
+ * @example
+ * const found_some_cond = walk_parent(my_ast_node, (node, { parent }) => {
+ *   if (some_cond(node, parent())) return walk_abort
+ * });
+ */
+function walk_parent(node, cb, initial_stack) {
+    const to_visit = [node];
+    const push = to_visit.push.bind(to_visit);
+    const stack = initial_stack ? initial_stack.slice() : [];
+    const parent_pop_indices = [];
+
+    let current;
+
+    const info = {
+        parent: (n = 0) => {
+            if (n === -1) {
+                return current;
+            }
+
+            // [ p1 p0 ] [ 1 0 ]
+            if (initial_stack && n >= stack.length) {
+                n -= stack.length;
+                return initial_stack[
+                    initial_stack.length - (n + 1)
+                ];
+            }
+
+            return stack[stack.length - (1 + n)];
+        },
+    };
+
+    while (to_visit.length) {
+        current = to_visit.pop();
+
+        while (
+            parent_pop_indices.length &&
+            to_visit.length == parent_pop_indices[parent_pop_indices.length - 1]
+        ) {
+            stack.pop();
+            parent_pop_indices.pop();
+        }
+
+        const ret = cb(current, info);
+
+        if (ret) {
+            if (ret === walk_abort) return true;
+            continue;
+        }
+
+        const visit_length = to_visit.length;
+
+        current._children_backwards(push);
+
+        // Push only if we're going to traverse the children
+        if (to_visit.length > visit_length) {
+            stack.push(current);
+            parent_pop_indices.push(visit_length - 1);
+        }
+    }
+
+    return false;
+}
+
+const walk_abort = Symbol("abort walk");
+
+/* -----[ TreeWalker ]----- */
+
+class TreeWalker {
+    constructor(callback) {
+        this.visit = callback;
+        this.stack = [];
+        this.directives = Object.create(null);
+    }
+
+    _visit(node, descend) {
+        this.push(node);
+        var ret = this.visit(node, descend ? function() {
+            descend.call(node);
+        } : noop);
+        if (!ret && descend) {
+            descend.call(node);
+        }
+        this.pop();
+        return ret;
+    }
+
+    parent(n) {
+        return this.stack[this.stack.length - 2 - (n || 0)];
+    }
+
+    push(node) {
+        if (node instanceof AST_Lambda) {
+            this.directives = Object.create(this.directives);
+        } else if (node instanceof AST_Directive && !this.directives[node.value]) {
+            this.directives[node.value] = node;
+        } else if (node instanceof AST_Class) {
+            this.directives = Object.create(this.directives);
+            if (!this.directives["use strict"]) {
+                this.directives["use strict"] = node;
+            }
+        }
+        this.stack.push(node);
+    }
+
+    pop() {
+        var node = this.stack.pop();
+        if (node instanceof AST_Lambda || node instanceof AST_Class) {
+            this.directives = Object.getPrototypeOf(this.directives);
+        }
+    }
+
+    self() {
+        return this.stack[this.stack.length - 1];
+    }
+
+    find_parent(type) {
+        var stack = this.stack;
+        for (var i = stack.length; --i >= 0;) {
+            var x = stack[i];
+            if (x instanceof type) return x;
+        }
+    }
+
+    is_within_loop() {
+        let i = this.stack.length - 1;
+        let child = this.stack[i];
+        while (i--) {
+            const node = this.stack[i];
+
+            if (node instanceof AST_Lambda) return false;
+            if (
+                node instanceof AST_IterationStatement
+                // exclude for-loop bits that only run once
+                && !((node instanceof AST_For) && child === node.init)
+                && !((node instanceof AST_ForIn || node instanceof AST_ForOf) && child === node.object)
+            ) {
+                return true;
+            }
+
+            child = node;
+        }
+
+        return false;
+    }
+
+    find_scope() {
+        var stack = this.stack;
+        for (var i = stack.length; --i >= 0;) {
+            const p = stack[i];
+            if (p instanceof AST_Toplevel) return p;
+            if (p instanceof AST_Lambda) return p;
+            if (p.block_scope) return p.block_scope;
+        }
+    }
+
+    has_directive(type) {
+        var dir = this.directives[type];
+        if (dir) return dir;
+        var node = this.stack[this.stack.length - 1];
+        if (node instanceof AST_Scope && node.body) {
+            for (var i = 0; i < node.body.length; ++i) {
+                var st = node.body[i];
+                if (!(st instanceof AST_Directive)) break;
+                if (st.value == type) return st;
+            }
+        }
+    }
+
+    loopcontrol_target(node) {
+        var stack = this.stack;
+        if (node.label) for (var i = stack.length; --i >= 0;) {
+            var x = stack[i];
+            if (x instanceof AST_LabeledStatement && x.label.name == node.label.name)
+                return x.body;
+        } else for (var i = stack.length; --i >= 0;) {
+            var x = stack[i];
+            if (x instanceof AST_IterationStatement
+                || node instanceof AST_Break && x instanceof AST_Switch)
+                return x;
+        }
+    }
+}
+
+// Tree transformer helpers.
+class TreeTransformer extends TreeWalker {
+    constructor(before, after) {
+        super();
+        this.before = before;
+        this.after = after;
+    }
+}
+
+const _PURE       = 0b00000001;
+const _INLINE     = 0b00000010;
+const _NOINLINE   = 0b00000100;
+const _KEY        = 0b00001000;
+const _MANGLEPROP = 0b00010000;
+
+export {
+    AST_Accessor,
+    AST_Array,
+    AST_Arrow,
+    AST_Assign,
+    AST_Atom,
+    AST_Await,
+    AST_BigInt,
+    AST_Binary,
+    AST_Block,
+    AST_BlockStatement,
+    AST_Boolean,
+    AST_Break,
+    AST_Call,
+    AST_Case,
+    AST_Catch,
+    AST_Chain,
+    AST_Class,
+    AST_ClassExpression,
+    AST_ClassPrivateProperty,
+    AST_PrivateIn,
+    AST_ClassProperty,
+    AST_ClassStaticBlock,
+    AST_ConciseMethod,
+    AST_Conditional,
+    AST_Const,
+    AST_Constant,
+    AST_Continue,
+    AST_Debugger,
+    AST_Default,
+    AST_DefaultAssign,
+    AST_DefClass,
+    AST_Definitions,
+    AST_DefinitionsLike,
+    AST_Defun,
+    AST_Destructuring,
+    AST_Directive,
+    AST_Do,
+    AST_Dot,
+    AST_DotHash,
+    AST_DWLoop,
+    AST_EmptyStatement,
+    AST_Exit,
+    AST_Expansion,
+    AST_Export,
+    AST_False,
+    AST_Finally,
+    AST_For,
+    AST_ForIn,
+    AST_ForOf,
+    AST_Function,
+    AST_Hole,
+    AST_If,
+    AST_DynamicImport,
+    AST_Import,
+    AST_ImportMeta,
+    AST_Infinity,
+    AST_IterationStatement,
+    AST_Jump,
+    AST_Label,
+    AST_LabeledStatement,
+    AST_LabelRef,
+    AST_Lambda,
+    AST_Let,
+    AST_LoopControl,
+    AST_NameMapping,
+    AST_NaN,
+    AST_New,
+    AST_NewTarget,
+    AST_Node,
+    AST_Null,
+    AST_Number,
+    AST_Object,
+    AST_ObjectGetter,
+    AST_ObjectKeyVal,
+    AST_ObjectProperty,
+    AST_ObjectSetter,
+    AST_PrefixedTemplateString,
+    AST_PrivateGetter,
+    AST_PrivateMethod,
+    AST_PrivateSetter,
+    AST_PropAccess,
+    AST_RegExp,
+    AST_Return,
+    AST_Scope,
+    AST_Sequence,
+    AST_SimpleStatement,
+    AST_Statement,
+    AST_StatementWithBody,
+    AST_String,
+    AST_Sub,
+    AST_Super,
+    AST_Switch,
+    AST_SwitchBranch,
+    AST_Symbol,
+    AST_SymbolBlockDeclaration,
+    AST_SymbolCatch,
+    AST_SymbolClass,
+    AST_SymbolClassProperty,
+    AST_SymbolConst,
+    AST_SymbolDeclaration,
+    AST_SymbolDefClass,
+    AST_SymbolDefun,
+    AST_SymbolExport,
+    AST_SymbolExportForeign,
+    AST_SymbolFunarg,
+    AST_SymbolImport,
+    AST_SymbolImportForeign,
+    AST_SymbolLambda,
+    AST_SymbolLet,
+    AST_SymbolMethod,
+    AST_SymbolRef,
+    AST_SymbolUsing,
+    AST_SymbolVar,
+    AST_TemplateSegment,
+    AST_TemplateString,
+    AST_SymbolPrivateProperty,
+    AST_This,
+    AST_Throw,
+    AST_Token,
+    AST_Toplevel,
+    AST_True,
+    AST_Try,
+    AST_TryBlock,
+    AST_Unary,
+    AST_UnaryPostfix,
+    AST_UnaryPrefix,
+    AST_Undefined,
+    AST_Using,
+    AST_UsingDef,
+    AST_Var,
+    AST_VarDef,
+    AST_VarDefLike,
+    AST_While,
+    AST_With,
+    AST_Yield,
+
+    // Walkers
+    TreeTransformer,
+    TreeWalker,
+    walk,
+    walk_abort,
+    walk_body,
+    walk_parent,
+
+    // annotations
+    _INLINE,
+    _NOINLINE,
+    _PURE,
+    _KEY,
+    _MANGLEPROP,
+};
Index: frontend/node_modules/terser/lib/cli.js
===================================================================
--- frontend/node_modules/terser/lib/cli.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/cli.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,482 @@
+import { minify, _default_options } from "../main.js";
+import { parse } from "./parse.js";
+import {
+    AST_Assign,
+    AST_Array,
+    AST_Constant,
+    AST_Node,
+    AST_PropAccess,
+    AST_RegExp,
+    AST_Sequence,
+    AST_Symbol,
+    AST_Token,
+    walk
+} from "./ast.js";
+import { OutputStream } from "./output.js";
+
+export async function run_cli({ program, packageJson, fs, path }) {
+    const skip_keys = new Set([ "cname", "parent_scope", "scope", "uses_eval", "uses_with" ]);
+    var files = {};
+    var options = {
+        compress: false,
+        mangle: false
+    };
+    const default_options = await _default_options();
+    program.version(packageJson.name + " " + packageJson.version);
+    program.parseArgv = program.parse;
+    program.parse = undefined;
+
+    if (process.argv.includes("ast")) program.helpInformation = describe_ast;
+    else if (process.argv.includes("options")) program.helpInformation = function() {
+        var text = [];
+        for (var option in default_options) {
+            text.push("--" + (option === "sourceMap" ? "source-map" : option) + " options:");
+            text.push(format_object(default_options[option]));
+            text.push("");
+        }
+        return text.join("\n");
+    };
+
+    program.option("-p, --parse <options>", "Specify parser options.", parse_js());
+    program.option("-c, --compress [options]", "Enable compressor/specify compressor options.", parse_js());
+    program.option("-m, --mangle [options]", "Mangle names/specify mangler options.", parse_js());
+    program.option("--mangle-props [options]", "Mangle properties/specify mangler options.", parse_js());
+    program.option("-f, --format [options]", "Format options.", parse_js());
+    program.option("-b, --beautify [options]", "Alias for --format.", parse_js());
+    program.option("-o, --output <file>", "Output file (default STDOUT).");
+    program.option("--comments [filter]", "Preserve copyright comments in the output.");
+    program.option("--config-file <file>", "Read minify() options from JSON file.");
+    program.option("-d, --define <expr>[=value]", "Global definitions.", parse_js("define"));
+    program.option("--ecma <version>", "Specify ECMAScript release: 5, 2015, 2016 or 2017...");
+    program.option("-e, --enclose [arg[,...][:value[,...]]]", "Embed output in a big function with configurable arguments and values.");
+    program.option("--ie8", "Support non-standard Internet Explorer 8.");
+    program.option("--keep-classnames", "Do not mangle/drop class names.");
+    program.option("--keep-fnames", "Do not mangle/drop function names. Useful for code relying on Function.prototype.name.");
+    program.option("--module", "Input is an ES6 module");
+    program.option("--name-cache <file>", "File to hold mangled name mappings.");
+    program.option("--rename", "Force symbol expansion.");
+    program.option("--no-rename", "Disable symbol expansion.");
+    program.option("--safari10", "Support non-standard Safari 10.");
+    program.option("--source-map [options]", "Enable source map/specify source map options.", parse_js());
+    program.option("--timings", "Display operations run time on STDERR.");
+    program.option("--toplevel", "Compress and/or mangle variables in toplevel scope.");
+    program.option("--wrap <name>", "Embed everything as a function with “exports” corresponding to “name” globally.");
+    program.arguments("[files...]").parseArgv(process.argv);
+    if (program.configFile) {
+        options = JSON.parse(read_file(program.configFile));
+    }
+    if (!program.output && program.sourceMap && program.sourceMap.url != "inline") {
+        fatal("ERROR: cannot write source map to STDOUT");
+    }
+
+    [
+        "compress",
+        "enclose",
+        "ie8",
+        "mangle",
+        "module",
+        "safari10",
+        "sourceMap",
+        "toplevel",
+        "wrap"
+    ].forEach(function(name) {
+        if (name in program) {
+            options[name] = program[name];
+        }
+    });
+
+    if ("ecma" in program) {
+        if (program.ecma != (program.ecma | 0)) fatal("ERROR: ecma must be an integer");
+        const ecma = program.ecma | 0;
+        if (ecma > 5 && ecma < 2015)
+            options.ecma = ecma + 2009;
+        else
+            options.ecma = ecma;
+    }
+    if (program.format || program.beautify) {
+        const chosenOption = program.format || program.beautify;
+        options.format = typeof chosenOption === "object" ? chosenOption : {};
+    }
+    if (program.comments) {
+        if (typeof options.format != "object") options.format = {};
+        options.format.comments = typeof program.comments == "string" ? (program.comments == "false" ? false : program.comments) : "some";
+    }
+    if (program.define) {
+        if (typeof options.compress != "object") options.compress = {};
+        if (typeof options.compress.global_defs != "object") options.compress.global_defs = {};
+        for (var expr in program.define) {
+            options.compress.global_defs[expr] = program.define[expr];
+        }
+    }
+    if (program.keepClassnames) {
+        options.keep_classnames = true;
+    }
+    if (program.keepFnames) {
+        options.keep_fnames = true;
+    }
+    if (program.mangleProps) {
+        if (program.mangleProps.domprops) {
+            delete program.mangleProps.domprops;
+        } else {
+            if (typeof program.mangleProps != "object") program.mangleProps = {};
+            if (!Array.isArray(program.mangleProps.reserved)) program.mangleProps.reserved = [];
+        }
+        if (typeof options.mangle != "object") options.mangle = {};
+        options.mangle.properties = program.mangleProps;
+    }
+    if (program.nameCache) {
+        options.nameCache = JSON.parse(read_file(program.nameCache, "{}"));
+    }
+    if (program.output == "ast") {
+        options.format = {
+            ast: true,
+            code: false
+        };
+    }
+    if (program.parse) {
+        if (!program.parse.acorn && !program.parse.spidermonkey) {
+            options.parse = program.parse;
+        } else if (program.sourceMap && program.sourceMap.content == "inline") {
+            fatal("ERROR: inline source map only works with built-in parser");
+        }
+    }
+    if (~program.rawArgs.indexOf("--rename")) {
+        options.rename = true;
+    } else if (!program.rename) {
+        options.rename = false;
+    }
+
+    let convert_path = name => name;
+    if (typeof program.sourceMap == "object" && "base" in program.sourceMap) {
+        convert_path = function() {
+            var base = program.sourceMap.base;
+            delete options.sourceMap.base;
+            return function(name) {
+                return path.relative(base, name);
+            };
+        }();
+    }
+
+    let filesList;
+    if (options.files && options.files.length) {
+        filesList = options.files;
+
+        delete options.files;
+    } else if (program.args.length) {
+        filesList = program.args;
+    }
+
+    if (filesList) {
+        simple_glob(filesList).forEach(function(name) {
+            files[convert_path(name)] = read_file(name);
+        });
+    } else {
+        await new Promise((resolve) => {
+            var chunks = [];
+            process.stdin.setEncoding("utf8");
+            process.stdin.on("data", function(chunk) {
+                chunks.push(chunk);
+            }).on("end", function() {
+                files = [ chunks.join("") ];
+                resolve();
+            });
+            process.stdin.resume();
+        });
+    }
+
+    await run_cli();
+
+    function convert_ast(fn) {
+        return AST_Node.from_mozilla_ast(Object.keys(files).reduce(fn, null));
+    }
+
+    async function run_cli() {
+        var content = program.sourceMap && program.sourceMap.content;
+        if (content && content !== "inline") {
+            options.sourceMap.content = read_file(content, content);
+        }
+        if (program.timings) options.timings = true;
+
+        try {
+            if (program.parse) {
+                if (program.parse.acorn) {
+                    files = convert_ast(function(toplevel, name) {
+                        return require("acorn").parse(files[name], {
+                            ecmaVersion: 2024,
+                            locations: true,
+                            program: toplevel,
+                            sourceFile: name,
+                            sourceType: options.module || program.parse.module ? "module" : "script"
+                        });
+                    });
+                } else if (program.parse.spidermonkey) {
+                    files = convert_ast(function(toplevel, name) {
+                        var obj = JSON.parse(files[name]);
+                        if (!toplevel) return obj;
+                        toplevel.body = toplevel.body.concat(obj.body);
+                        return toplevel;
+                    });
+                }
+            }
+        } catch (ex) {
+            fatal(ex);
+        }
+
+        let result;
+        try {
+            result = await minify(files, options, fs);
+        } catch (ex) {
+            if (ex.name == "SyntaxError") {
+                print_error("Parse error at " + ex.filename + ":" + ex.line + "," + ex.col);
+                var col = ex.col;
+                var lines = files[ex.filename].split(/\r?\n/);
+                var line = lines[ex.line - 1];
+                if (!line && !col) {
+                    line = lines[ex.line - 2];
+                    col = line.length;
+                }
+                if (line) {
+                    var limit = 70;
+                    if (col > limit) {
+                        line = line.slice(col - limit);
+                        col = limit;
+                    }
+                    print_error(line.slice(0, 80));
+                    print_error(line.slice(0, col).replace(/\S/g, " ") + "^");
+                }
+            }
+            if (ex.defs) {
+                print_error("Supported options:");
+                print_error(format_object(ex.defs));
+            }
+            fatal(ex);
+            return;
+        }
+
+        if (program.output == "ast") {
+            if (!options.compress && !options.mangle) {
+                result.ast.figure_out_scope({});
+            }
+            console.log(JSON.stringify(result.ast, function(key, value) {
+                if (value) switch (key) {
+                  case "thedef":
+                    return symdef(value);
+                  case "enclosed":
+                    return value.length ? value.map(symdef) : undefined;
+                  case "variables":
+                  case "globals":
+                    return value.size ? collect_from_map(value, symdef) : undefined;
+                }
+                if (skip_keys.has(key)) return;
+                if (value instanceof AST_Token) return;
+                if (value instanceof Map) return;
+                if (value instanceof AST_Node) {
+                    var result = {
+                        _class: "AST_" + value.TYPE
+                    };
+                    if (value.block_scope) {
+                        result.variables = value.block_scope.variables;
+                        result.enclosed = value.block_scope.enclosed;
+                    }
+                    value.CTOR.PROPS.forEach(function(prop) {
+                        if (prop !== "block_scope") {
+                            result[prop] = value[prop];
+                        }
+                    });
+                    return result;
+                }
+                return value;
+            }, 2));
+        } else if (program.output == "spidermonkey") {
+            try {
+                const minified = await minify(
+                    result.code,
+                    {
+                        compress: false,
+                        mangle: false,
+                        format: {
+                            ast: true,
+                            code: false
+                        }
+                    },
+                    fs
+                );
+                console.log(JSON.stringify(minified.ast.to_mozilla_ast(), null, 2));
+            } catch (ex) {
+                fatal(ex);
+                return;
+            }
+        } else if (program.output) {
+            fs.mkdirSync(path.dirname(program.output), { recursive: true });
+            fs.writeFileSync(program.output, result.code);
+            if (options.sourceMap && options.sourceMap.url !== "inline" && result.map) {
+                fs.writeFileSync(program.output + ".map", result.map);
+            }
+        } else {
+            console.log(result.code);
+        }
+        if (program.nameCache) {
+            fs.writeFileSync(program.nameCache, JSON.stringify(options.nameCache));
+        }
+        if (result.timings) for (var phase in result.timings) {
+            print_error("- " + phase + ": " + result.timings[phase].toFixed(3) + "s");
+        }
+    }
+
+    function fatal(message) {
+        if (message instanceof Error) message = message.stack.replace(/^\S*?Error:/, "ERROR:");
+        print_error(message);
+        process.exit(1);
+    }
+
+    // A file glob function that only supports "*" and "?" wildcards in the basename.
+    // Example: "foo/bar/*baz??.*.js"
+    // Argument `glob` may be a string or an array of strings.
+    // Returns an array of strings. Garbage in, garbage out.
+    function simple_glob(glob) {
+        if (Array.isArray(glob)) {
+            return [].concat.apply([], glob.map(simple_glob));
+        }
+        if (glob && glob.match(/[*?]/)) {
+            var dir = path.dirname(glob);
+            try {
+                var entries = fs.readdirSync(dir);
+            } catch (ex) {}
+            if (entries) {
+                var pattern = "^" + path.basename(glob)
+                    .replace(/[.+^$[\]\\(){}]/g, "\\$&")
+                    .replace(/\*/g, "[^/\\\\]*")
+                    .replace(/\?/g, "[^/\\\\]") + "$";
+                var mod = process.platform === "win32" ? "i" : "";
+                var rx = new RegExp(pattern, mod);
+                var results = entries.filter(function(name) {
+                    return rx.test(name);
+                }).map(function(name) {
+                    return path.join(dir, name);
+                });
+                if (results.length) return results;
+            }
+        }
+        return [ glob ];
+    }
+
+    function read_file(path, default_value) {
+        try {
+            return fs.readFileSync(path, "utf8");
+        } catch (ex) {
+            if ((ex.code == "ENOENT" || ex.code == "ENAMETOOLONG") && default_value != null) return default_value;
+            fatal(ex);
+        }
+    }
+
+    function parse_js(flag) {
+        return function(value, options) {
+            options = options || {};
+            try {
+                walk(parse(value, { expression: true }), node => {
+                    if (node instanceof AST_Assign) {
+                        var name = node.left.print_to_string();
+                        var value = node.right;
+                        if (flag) {
+                            options[name] = value;
+                        } else if (value instanceof AST_Array) {
+                            options[name] = value.elements.map(to_string);
+                        } else if (value instanceof AST_RegExp) {
+                            value = value.value;
+                            options[name] = new RegExp(value.source, value.flags);
+                        } else {
+                            options[name] = to_string(value);
+                        }
+                        return true;
+                    }
+                    if (node instanceof AST_Symbol || node instanceof AST_PropAccess) {
+                        var name = node.print_to_string();
+                        options[name] = true;
+                        return true;
+                    }
+                    if (!(node instanceof AST_Sequence)) throw node;
+
+                    function to_string(value) {
+                        return value instanceof AST_Constant ? value.getValue() : value.print_to_string({
+                            quote_keys: true
+                        });
+                    }
+                });
+            } catch(ex) {
+                if (flag) {
+                    fatal("Error parsing arguments for '" + flag + "': " + value);
+                } else {
+                    options[value] = null;
+                }
+            }
+            return options;
+        };
+    }
+
+    function symdef(def) {
+        var ret = (1e6 + def.id) + " " + def.name;
+        if (def.mangled_name) ret += " " + def.mangled_name;
+        return ret;
+    }
+
+    function collect_from_map(map, callback) {
+        var result = [];
+        map.forEach(function (def) {
+            result.push(callback(def));
+        });
+        return result;
+    }
+
+    function format_object(obj) {
+        var lines = [];
+        var padding = "";
+        Object.keys(obj).map(function(name) {
+            if (padding.length < name.length) padding = Array(name.length + 1).join(" ");
+            return [ name, JSON.stringify(obj[name]) ];
+        }).forEach(function(tokens) {
+            lines.push("  " + tokens[0] + padding.slice(tokens[0].length - 2) + tokens[1]);
+        });
+        return lines.join("\n");
+    }
+
+    function print_error(msg) {
+        process.stderr.write(msg);
+        process.stderr.write("\n");
+    }
+
+    function describe_ast() {
+        var out = OutputStream({ beautify: true });
+        function doitem(ctor) {
+            out.print("AST_" + ctor.TYPE);
+            const props = ctor.SELF_PROPS.filter(prop => !/^\$/.test(prop));
+
+            if (props.length > 0) {
+                out.space();
+                out.with_parens(function() {
+                    props.forEach(function(prop, i) {
+                        if (i) out.space();
+                        out.print(prop);
+                    });
+                });
+            }
+
+            if (ctor.documentation) {
+                out.space();
+                out.print_string(ctor.documentation);
+            }
+
+            if (ctor.SUBCLASSES.length > 0) {
+                out.space();
+                out.with_block(function() {
+                    ctor.SUBCLASSES.forEach(function(ctor) {
+                        out.indent();
+                        doitem(ctor);
+                        out.newline();
+                    });
+                });
+            }
+        }
+        doitem(AST_Node);
+        return out + "\n";
+    }
+}
Index: frontend/node_modules/terser/lib/compress/common.js
===================================================================
--- frontend/node_modules/terser/lib/compress/common.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/compress/common.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,375 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+import {
+    AST_Array,
+    AST_Arrow,
+    AST_BigInt,
+    AST_BlockStatement,
+    AST_Call,
+    AST_Chain,
+    AST_Class,
+    AST_Const,
+    AST_Constant,
+    AST_DefClass,
+    AST_Defun,
+    AST_EmptyStatement,
+    AST_Export,
+    AST_False,
+    AST_Function,
+    AST_Import,
+    AST_Infinity,
+    AST_LabeledStatement,
+    AST_Lambda,
+    AST_Let,
+    AST_LoopControl,
+    AST_NaN,
+    AST_Node,
+    AST_Null,
+    AST_Number,
+    AST_Object,
+    AST_ObjectKeyVal,
+    AST_PropAccess,
+    AST_RegExp,
+    AST_Scope,
+    AST_Sequence,
+    AST_SimpleStatement,
+    AST_Statement,
+    AST_String,
+    AST_SymbolRef,
+    AST_True,
+    AST_UnaryPrefix,
+    AST_Undefined,
+    AST_Using,
+
+    TreeWalker,
+    walk,
+    walk_abort,
+    walk_parent,
+} from "../ast.js";
+import { make_node, make_void_0, regexp_source_fix, string_template, makePredicate } from "../utils/index.js";
+import { first_in_statement } from "../utils/first_in_statement.js";
+import { has_flag, TOP } from "./compressor-flags.js";
+
+export function merge_sequence(array, node) {
+    if (node instanceof AST_Sequence) {
+        array.push(...node.expressions);
+    } else {
+        array.push(node);
+    }
+    return array;
+}
+
+export function make_sequence(orig, expressions) {
+    if (expressions.length == 1) return expressions[0];
+    if (expressions.length == 0) throw new Error("trying to create a sequence with length zero!");
+    return make_node(AST_Sequence, orig, {
+        expressions: expressions.reduce(merge_sequence, [])
+    });
+}
+
+export function make_empty_function(self) {
+    return make_node(AST_Function, self, {
+        uses_arguments: false,
+        argnames: [],
+        body: [],
+        is_generator: false,
+        async: false,
+        variables: new Map(),
+        uses_with: false,
+        uses_eval: false,
+        parent_scope: null,
+        enclosed: [],
+        cname: 0,
+        block_scope: undefined,
+    });
+}
+
+export function make_node_from_constant(val, orig) {
+    switch (typeof val) {
+      case "string":
+        return make_node(AST_String, orig, {
+            value: val
+        });
+      case "number":
+        if (isNaN(val)) return make_node(AST_NaN, orig);
+        if (isFinite(val)) {
+            return 1 / val < 0 ? make_node(AST_UnaryPrefix, orig, {
+                operator: "-",
+                expression: make_node(AST_Number, orig, { value: -val })
+            }) : make_node(AST_Number, orig, { value: val });
+        }
+        return val < 0 ? make_node(AST_UnaryPrefix, orig, {
+            operator: "-",
+            expression: make_node(AST_Infinity, orig)
+        }) : make_node(AST_Infinity, orig);
+      case "bigint":
+        return make_node(AST_BigInt, orig, { value: val.toString() });
+      case "boolean":
+        return make_node(val ? AST_True : AST_False, orig);
+      case "undefined":
+        return make_void_0(orig);
+      default:
+        if (val === null) {
+            return make_node(AST_Null, orig, { value: null });
+        }
+        if (val instanceof RegExp) {
+            return make_node(AST_RegExp, orig, {
+                value: {
+                    source: regexp_source_fix(val.source),
+                    flags: val.flags
+                }
+            });
+        }
+        throw new Error(string_template("Can't handle constant of type: {type}", {
+            type: typeof val
+        }));
+    }
+}
+
+export function best_of_expression(ast1, ast2) {
+    return ast1.size() > ast2.size() ? ast2 : ast1;
+}
+
+export function best_of_statement(ast1, ast2) {
+    return best_of_expression(
+        make_node(AST_SimpleStatement, ast1, {
+            body: ast1
+        }),
+        make_node(AST_SimpleStatement, ast2, {
+            body: ast2
+        })
+    ).body;
+}
+
+/** Find which node is smaller, and return that */
+export function best_of(compressor, ast1, ast2) {
+    if (first_in_statement(compressor)) {
+        return best_of_statement(ast1, ast2);
+    } else {
+        return best_of_expression(ast1, ast2);
+    }
+}
+
+/** Simplify an object property's key, if possible */
+export function get_simple_key(key) {
+    if (key instanceof AST_Constant) {
+        return key.getValue();
+    }
+    if (key instanceof AST_UnaryPrefix
+        && key.operator == "void"
+        && key.expression instanceof AST_Constant) {
+        return undefined;
+    }
+    return key;
+}
+
+export function read_property(obj, key) {
+    key = get_simple_key(key);
+    if (key instanceof AST_Node) return;
+
+    var value;
+    if (obj instanceof AST_Array) {
+        var elements = obj.elements;
+        if (key == "length") return make_node_from_constant(elements.length, obj);
+        if (typeof key == "number" && key in elements) value = elements[key];
+    } else if (obj instanceof AST_Object) {
+        key = "" + key;
+        var props = obj.properties;
+        for (var i = props.length; --i >= 0;) {
+            var prop = props[i];
+            if (!(prop instanceof AST_ObjectKeyVal)) return;
+            if (!value && props[i].key === key) value = props[i].value;
+        }
+    }
+
+    return value instanceof AST_SymbolRef && value.fixed_value() || value;
+}
+
+export function has_break_or_continue(loop, parent) {
+    var found = false;
+    var tw = new TreeWalker(function(node) {
+        if (found || node instanceof AST_Scope) return true;
+        if (node instanceof AST_LoopControl && tw.loopcontrol_target(node) === loop) {
+            return found = true;
+        }
+    });
+    if (parent instanceof AST_LabeledStatement) tw.push(parent);
+    tw.push(loop);
+    loop.body.walk(tw);
+    return found;
+}
+
+// we shouldn't compress (1,func)(something) to
+// func(something) because that changes the meaning of
+// the func (becomes lexical instead of global).
+export function maintain_this_binding(parent, orig, val) {
+    if (requires_sequence_to_maintain_binding(parent, orig, val)) {
+        const zero = make_node(AST_Number, orig, { value: 0 });
+        return make_sequence(orig, [ zero, val ]);
+    } else {
+        return val;
+    }
+}
+
+/** Detect (1, x.noThis)(), (0, eval)(), which need sequences */
+export function requires_sequence_to_maintain_binding(parent, orig, val) {
+    return (
+        parent instanceof AST_UnaryPrefix && parent.operator == "delete"
+        || parent instanceof AST_Call && parent.expression === orig
+            && (
+                val instanceof AST_Chain
+                || val instanceof AST_PropAccess
+                || val instanceof AST_SymbolRef && val.name == "eval"
+            )
+    );
+}
+
+export function is_func_expr(node) {
+    return node instanceof AST_Arrow || node instanceof AST_Function;
+}
+
+/**
+ * Used to determine whether the node can benefit from negation.
+ * Not the case with arrow functions (you need an extra set of parens). */
+export function is_iife_call(node) {
+    if (node.TYPE != "Call") return false;
+    return node.expression instanceof AST_Function || is_iife_call(node.expression);
+}
+
+export function is_empty(thing) {
+    if (thing === null) return true;
+    if (thing instanceof AST_EmptyStatement) return true;
+    if (thing instanceof AST_BlockStatement) return thing.body.length == 0;
+    return false;
+}
+
+export const identifier_atom = makePredicate("Infinity NaN undefined");
+export function is_identifier_atom(node) {
+    return node instanceof AST_Infinity
+        || node instanceof AST_NaN
+        || node instanceof AST_Undefined;
+}
+
+/** Check if this is a SymbolRef node which has one def of a certain AST type */
+export function is_ref_of(ref, type) {
+    if (!(ref instanceof AST_SymbolRef)) return false;
+    var orig = ref.definition().orig;
+    for (var i = orig.length; --i >= 0;) {
+        if (orig[i] instanceof type) return true;
+    }
+}
+
+/**Can we turn { block contents... } into just the block contents ?
+ * Not if one of these is inside.
+ **/
+export function can_be_evicted_from_block(node) {
+    return !(
+        node instanceof AST_DefClass ||
+        node instanceof AST_Defun ||
+        node instanceof AST_Let ||
+        node instanceof AST_Const ||
+        node instanceof AST_Using ||
+        node instanceof AST_Export ||
+        node instanceof AST_Import
+    );
+}
+
+export function as_statement_array(thing) {
+    if (thing === null) return [];
+    if (thing instanceof AST_BlockStatement) return thing.body;
+    if (thing instanceof AST_EmptyStatement) return [];
+    if (thing instanceof AST_Statement) return [ thing ];
+    throw new Error("Can't convert thing to statement array");
+}
+
+export function is_reachable(scope_node, defs) {
+    const find_ref = node => {
+        if (node instanceof AST_SymbolRef && defs.includes(node.definition())) {
+            return walk_abort;
+        }
+    };
+
+    return walk_parent(scope_node, (node, info) => {
+        if (node instanceof AST_Scope && node !== scope_node) {
+            var parent = info.parent();
+
+            if (
+                parent instanceof AST_Call
+                && parent.expression === node
+                // Async/Generators aren't guaranteed to sync evaluate all of
+                // their body steps, so it's possible they close over the variable.
+                && !(node.async || node.is_generator)
+            ) {
+                return;
+            }
+
+            if (walk(node, find_ref)) return walk_abort;
+
+            return true;
+        }
+    });
+}
+
+/** Check if a ref refers to the name of a function/class it's defined within */
+export function is_recursive_ref(tw, def) {
+    var node;
+    for (var i = 0; node = tw.parent(i); i++) {
+        if (node instanceof AST_Lambda || node instanceof AST_Class) {
+            var name = node.name;
+            if (name && name.definition() === def) {
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
+// TODO this only works with AST_Defun, shouldn't it work for other ways of defining functions?
+export function retain_top_func(fn, compressor) {
+    return compressor.top_retain
+        && fn instanceof AST_Defun
+        && has_flag(fn, TOP)
+        && fn.name
+        && compressor.top_retain(fn.name.definition());
+}
Index: frontend/node_modules/terser/lib/compress/compressor-flags.js
===================================================================
--- frontend/node_modules/terser/lib/compress/compressor-flags.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/compress/compressor-flags.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,62 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+// bitfield flags to be stored in node.flags.
+// These are set and unset during compression, and store information in the node without requiring multiple fields.
+export const UNUSED = 0b00000001;
+export const TRUTHY = 0b00000010;
+export const FALSY = 0b00000100;
+export const UNDEFINED = 0b00001000;
+export const INLINED = 0b00010000;
+// Nodes to which values are ever written. Used when keep_assign is part of the unused option string.
+export const WRITE_ONLY = 0b00100000;
+
+// information specific to a single compression pass
+export const SQUEEZED = 0b0000000100000000;
+export const OPTIMIZED = 0b0000001000000000;
+export const TOP = 0b0000010000000000;
+export const CLEAR_BETWEEN_PASSES = SQUEEZED | OPTIMIZED | TOP;
+
+export const has_flag = (node, flag) => node.flags & flag;
+export const set_flag = (node, flag) => { node.flags |= flag; };
+export const clear_flag = (node, flag) => { node.flags &= ~flag; };
Index: frontend/node_modules/terser/lib/compress/drop-side-effect-free.js
===================================================================
--- frontend/node_modules/terser/lib/compress/drop-side-effect-free.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/compress/drop-side-effect-free.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,394 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+import {
+    AST_Accessor,
+    AST_Array,
+    AST_Arrow,
+    AST_Assign,
+    AST_Binary,
+    AST_Call,
+    AST_Chain,
+    AST_Class,
+    AST_ClassPrivateProperty,
+    AST_ClassProperty,
+    AST_ClassStaticBlock,
+    AST_ConciseMethod,
+    AST_Conditional,
+    AST_Constant,
+    AST_DefClass,
+    AST_Dot,
+    AST_DynamicImport,
+    AST_Expansion,
+    AST_Function,
+    AST_Node,
+    AST_Number,
+    AST_Object,
+    AST_ObjectGetter,
+    AST_ObjectKeyVal,
+    AST_ObjectSetter,
+    AST_PrivateGetter,
+    AST_PrivateSetter,
+    AST_PrivateMethod,
+    AST_PropAccess,
+    AST_Scope,
+    AST_Sequence,
+    AST_SimpleStatement,
+    AST_Sub,
+    AST_SymbolRef,
+    AST_TemplateSegment,
+    AST_TemplateString,
+    AST_This,
+    AST_Unary,
+} from "../ast.js";
+import { make_node, return_null, return_this } from "../utils/index.js";
+import { first_in_statement } from "../utils/first_in_statement.js";
+
+import { pure_prop_access_globals } from "./native-objects.js";
+import { lazy_op, unary_side_effects, is_nullish_shortcircuited } from "./inference.js";
+import { WRITE_ONLY, set_flag, clear_flag } from "./compressor-flags.js";
+import { make_sequence, is_func_expr, is_iife_call } from "./common.js";
+
+// AST_Node#drop_side_effect_free() gets called when we don't care about the value,
+// only about side effects. We'll be defining this method for each node type in this module
+//
+// Examples:
+// foo++ -> foo++
+// 1 + func() -> func()
+// 10 -> (nothing)
+// knownPureFunc(foo++) -> foo++
+
+function def_drop_side_effect_free(node_or_nodes, func) {
+    for (const node of [].concat(node_or_nodes)) {
+        node.DEFMETHOD("drop_side_effect_free", func);
+    }
+}
+
+// Drop side-effect-free elements from an array of expressions.
+// Returns an array of expressions with side-effects or null
+// if all elements were dropped. Note: original array may be
+// returned if nothing changed.
+function trim(nodes, compressor, first_in_statement) {
+    var len = nodes.length;
+    if (!len)  return null;
+
+    var ret = [], changed = false;
+    for (var i = 0; i < len; i++) {
+        var node = nodes[i].drop_side_effect_free(compressor, first_in_statement);
+        changed |= node !== nodes[i];
+        if (node) {
+            ret.push(node);
+            first_in_statement = false;
+        }
+    }
+    return changed ? ret.length ? ret : null : nodes;
+}
+
+def_drop_side_effect_free(AST_Node, return_this);
+def_drop_side_effect_free(AST_Constant, return_null);
+def_drop_side_effect_free(AST_This, return_null);
+
+def_drop_side_effect_free(AST_Call, function (compressor, first_in_statement) {
+    if (is_nullish_shortcircuited(this, compressor)) {
+        return this.expression.drop_side_effect_free(compressor, first_in_statement);
+    }
+
+    if (!this.is_callee_pure(compressor)) {
+        if (this.expression.is_call_pure(compressor)) {
+            var exprs = this.args.slice();
+            exprs.unshift(this.expression.expression);
+            exprs = trim(exprs, compressor, first_in_statement);
+            return exprs && make_sequence(this, exprs);
+        }
+        if (is_func_expr(this.expression)
+            && (!this.expression.name || !this.expression.name.definition().references.length)) {
+            var node = this.clone();
+            node.expression.process_expression(false, compressor);
+            return node;
+        }
+        return this;
+    }
+
+    var args = trim(this.args, compressor, first_in_statement);
+    return args && make_sequence(this, args);
+});
+
+def_drop_side_effect_free(AST_DynamicImport, function (compressor, first_in_statement) {
+    if (this.phase !== "source") return this;
+    var args = trim(this.args, compressor, first_in_statement);
+    return args && make_sequence(this, args);
+});
+
+def_drop_side_effect_free(AST_Accessor, return_null);
+
+def_drop_side_effect_free(AST_Function, return_null);
+
+def_drop_side_effect_free(AST_Arrow, return_null);
+
+def_drop_side_effect_free(AST_Class, function (compressor) {
+    const with_effects = [];
+
+    if (this.is_self_referential() && this.has_side_effects(compressor)) {
+        return this;
+    }
+
+    const trimmed_extends = this.extends && this.extends.drop_side_effect_free(compressor);
+    if (trimmed_extends) with_effects.push(trimmed_extends);
+
+    for (const prop of this.properties) {
+        if (prop instanceof AST_ClassStaticBlock) {
+            if (prop.has_side_effects(compressor)) {
+                return this; // Be cautious about these
+            }
+        } else {
+            const trimmed_prop = prop.drop_side_effect_free(compressor);
+            if (trimmed_prop) with_effects.push(trimmed_prop);
+        }
+    }
+
+    if (!with_effects.length)
+        return null;
+
+    const exprs = make_sequence(this, with_effects);
+    if (this instanceof AST_DefClass) {
+        // We want a statement
+        return make_node(AST_SimpleStatement, this, { body: exprs });
+    } else {
+        return exprs;
+    }
+});
+
+def_drop_side_effect_free([
+    AST_ClassProperty,
+    AST_ClassPrivateProperty,
+], function (compressor) {
+    const key = this.computed_key() && this.key.drop_side_effect_free(compressor);
+
+    const value = this.static && this.value
+        && this.value.drop_side_effect_free(compressor);
+
+    if (key && value)
+        return make_sequence(this, [key, value]);
+    return key || value || null;
+});
+
+def_drop_side_effect_free(AST_Binary, function (compressor, first_in_statement) {
+    var right = this.right.drop_side_effect_free(compressor);
+    if (!right)
+        return this.left.drop_side_effect_free(compressor, first_in_statement);
+    if (lazy_op.has(this.operator)) {
+        if (right === this.right)
+            return this;
+        var node = this.clone();
+        node.right = right;
+        return node;
+    } else {
+        var left = this.left.drop_side_effect_free(compressor, first_in_statement);
+        if (!left)
+            return this.right.drop_side_effect_free(compressor, first_in_statement);
+        return make_sequence(this, [left, right]);
+    }
+});
+
+def_drop_side_effect_free(AST_Assign, function (compressor) {
+    if (this.logical)
+        return this;
+
+    var left = this.left;
+    if (left.has_side_effects(compressor)
+        || compressor.has_directive("use strict")
+        && left instanceof AST_PropAccess
+        && left.expression.is_constant()) {
+        return this;
+    }
+    set_flag(this, WRITE_ONLY);
+    while (left instanceof AST_PropAccess) {
+        left = left.expression;
+    }
+    if (left.is_constant_expression(compressor.find_parent(AST_Scope))) {
+        return this.right.drop_side_effect_free(compressor);
+    }
+    return this;
+});
+
+def_drop_side_effect_free(AST_Conditional, function (compressor) {
+    var consequent = this.consequent.drop_side_effect_free(compressor);
+    var alternative = this.alternative.drop_side_effect_free(compressor);
+    if (consequent === this.consequent && alternative === this.alternative)
+        return this;
+    if (!consequent)
+        return alternative ? make_node(AST_Binary, this, {
+            operator: "||",
+            left: this.condition,
+            right: alternative
+        }) : this.condition.drop_side_effect_free(compressor);
+    if (!alternative)
+        return make_node(AST_Binary, this, {
+            operator: "&&",
+            left: this.condition,
+            right: consequent
+        });
+    var node = this.clone();
+    node.consequent = consequent;
+    node.alternative = alternative;
+    return node;
+});
+
+def_drop_side_effect_free(AST_Unary, function (compressor, first_in_statement) {
+    if (unary_side_effects.has(this.operator)) {
+        if (!this.expression.has_side_effects(compressor)) {
+            set_flag(this, WRITE_ONLY);
+        } else {
+            clear_flag(this, WRITE_ONLY);
+        }
+        return this;
+    }
+    if (this.operator == "typeof" && this.expression instanceof AST_SymbolRef)
+        return null;
+    var expression = this.expression.drop_side_effect_free(compressor, first_in_statement);
+    if (first_in_statement && expression && is_iife_call(expression)) {
+        if (expression === this.expression && this.operator == "!")
+            return this;
+        return expression.negate(compressor, first_in_statement);
+    }
+    return expression;
+});
+
+def_drop_side_effect_free(AST_SymbolRef, function (compressor) {
+    const safe_access = this.is_declared(compressor)
+        || pure_prop_access_globals.has(this.name);
+    return safe_access ? null : this;
+});
+
+def_drop_side_effect_free(AST_Object, function (compressor, first_in_statement) {
+    var values = trim(this.properties, compressor, first_in_statement);
+    return values && make_sequence(this, values);
+});
+
+def_drop_side_effect_free(AST_ObjectKeyVal, function (compressor, first_in_statement) {
+    const computed_key = this.key instanceof AST_Node;
+    const key = computed_key && this.key.drop_side_effect_free(compressor, first_in_statement);
+    const value = this.value.drop_side_effect_free(compressor, first_in_statement);
+    if (key && value) {
+        return make_sequence(this, [key, value]);
+    }
+    return key || value;
+});
+
+def_drop_side_effect_free([
+    AST_ConciseMethod,
+    AST_ObjectGetter,
+    AST_ObjectSetter,
+], function (compressor, first_in_statement) {
+    return this.computed_key() ? this.key.drop_side_effect_free(compressor, first_in_statement) : null;
+});
+
+def_drop_side_effect_free([
+    AST_PrivateMethod,
+    AST_PrivateGetter,
+    AST_PrivateSetter,
+], function () {
+    return null;
+});
+
+def_drop_side_effect_free(AST_Array, function (compressor, first_in_statement) {
+    var values = trim(this.elements, compressor, first_in_statement);
+    return values && make_sequence(this, values);
+});
+
+def_drop_side_effect_free(AST_Dot, function (compressor, first_in_statement) {
+    if (is_nullish_shortcircuited(this, compressor)) {
+        return this.expression.drop_side_effect_free(compressor, first_in_statement);
+    }
+    if (!this.optional && this.expression.may_throw_on_access(compressor)) {
+        return this;
+    }
+
+    return this.expression.drop_side_effect_free(compressor, first_in_statement);
+});
+
+def_drop_side_effect_free(AST_Sub, function (compressor, first_in_statement) {
+    if (is_nullish_shortcircuited(this, compressor)) {
+        return this.expression.drop_side_effect_free(compressor, first_in_statement);
+    }
+    if (!this.optional && this.expression.may_throw_on_access(compressor)) {
+        return this;
+    }
+
+    var property = this.property.drop_side_effect_free(compressor);
+    if (property && this.optional) return this;
+
+    var expression = this.expression.drop_side_effect_free(compressor, first_in_statement);
+
+    if (expression && property) return make_sequence(this, [expression, property]);
+    return expression || property;
+});
+
+def_drop_side_effect_free(AST_Chain, function (compressor, first_in_statement) {
+    return this.expression.drop_side_effect_free(compressor, first_in_statement);
+});
+
+def_drop_side_effect_free(AST_Sequence, function (compressor) {
+    var last = this.tail_node();
+    var expr = last.drop_side_effect_free(compressor);
+    if (expr === last)
+        return this;
+    var expressions = this.expressions.slice(0, -1);
+    if (expr)
+        expressions.push(expr);
+    if (!expressions.length) {
+        return make_node(AST_Number, this, { value: 0 });
+    }
+    return make_sequence(this, expressions);
+});
+
+def_drop_side_effect_free(AST_Expansion, function (compressor, first_in_statement) {
+    return this.expression.drop_side_effect_free(compressor, first_in_statement);
+});
+
+def_drop_side_effect_free(AST_TemplateSegment, return_null);
+
+def_drop_side_effect_free(AST_TemplateString, function (compressor) {
+    var values = trim(this.segments, compressor, first_in_statement);
+    return values && make_sequence(this, values);
+});
Index: frontend/node_modules/terser/lib/compress/drop-unused.js
===================================================================
--- frontend/node_modules/terser/lib/compress/drop-unused.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/compress/drop-unused.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,507 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+import {
+    AST_Accessor,
+    AST_Assign,
+    AST_BlockStatement,
+    AST_Call,
+    AST_Class,
+    AST_ClassExpression,
+    AST_ClassStaticBlock,
+    AST_DefaultAssign,
+    AST_DefClass,
+    AST_Definitions,
+    AST_Defun,
+    AST_Destructuring,
+    AST_EmptyStatement,
+    AST_Expansion,
+    AST_Export,
+    AST_For,
+    AST_ForIn,
+    AST_Function,
+    AST_LabeledStatement,
+    AST_Lambda,
+    AST_Number,
+    AST_Scope,
+    AST_Sequence,
+    AST_SimpleStatement,
+    AST_SymbolBlockDeclaration,
+    AST_SymbolCatch,
+    AST_SymbolDeclaration,
+    AST_SymbolFunarg,
+    AST_SymbolRef,
+    AST_SymbolVar,
+    AST_Toplevel,
+    AST_Unary,
+    AST_Var,
+
+    TreeTransformer,
+    TreeWalker,
+    walk,
+} from "../ast.js";
+import {
+    keep_name,
+    make_node,
+    map_add,
+    MAP,
+    remove,
+    return_false,
+} from "../utils/index.js";
+import { SymbolDef } from "../scope.js";
+
+import {
+    WRITE_ONLY,
+    UNUSED,
+
+    has_flag,
+    set_flag,
+} from "./compressor-flags.js";
+import {
+    make_sequence,
+    maintain_this_binding,
+    is_empty,
+    is_ref_of,
+    can_be_evicted_from_block,
+} from "./common.js";
+import { is_used_in_expression } from "./inference.js";
+
+const r_keep_assign = /keep_assign/;
+
+/** Drop unused variables from this scope */
+AST_Scope.DEFMETHOD("drop_unused", function(compressor) {
+    if (!compressor.option("unused")) return;
+    if (compressor.has_directive("use asm")) return;
+    if (!this.variables) return; // not really a scope (eg: AST_Class)
+
+    var self = this;
+    if (self.pinned()) return;
+    var drop_funcs = !(self instanceof AST_Toplevel) || compressor.toplevel.funcs;
+    var drop_vars = !(self instanceof AST_Toplevel) || compressor.toplevel.vars;
+    const assign_as_unused = r_keep_assign.test(compressor.option("unused")) ? return_false : function(node) {
+        if (node instanceof AST_Assign
+            && !node.logical
+            && (has_flag(node, WRITE_ONLY) || node.operator == "=")
+        ) {
+            return node.left;
+        }
+        if (node instanceof AST_Unary && has_flag(node, WRITE_ONLY)) {
+            return node.expression;
+        }
+    };
+    var in_use_ids = new Map();
+    var fixed_ids = new Map();
+    if (self instanceof AST_Toplevel && compressor.top_retain) {
+        self.variables.forEach(function(def) {
+            if (compressor.top_retain(def)) {
+                in_use_ids.set(def.id, def);
+            }
+        });
+    }
+    var var_defs_by_id = new Map();
+    var initializations = new Map();
+
+    // pass 1: find out which symbols are directly used in
+    // this scope (not in nested scopes).
+    var scope = this;
+    var tw = new TreeWalker(function(node, descend) {
+        if (node instanceof AST_Lambda && node.uses_arguments && !tw.has_directive("use strict")) {
+            node.argnames.forEach(function(argname) {
+                if (!(argname instanceof AST_SymbolDeclaration)) return;
+                var def = argname.definition();
+                in_use_ids.set(def.id, def);
+            });
+        }
+        if (node === self) return;
+        if (node instanceof AST_Class && node.has_side_effects(compressor)) {
+            if (node.is_self_referential()) {
+                descend();
+            } else {
+                node.visit_nondeferred_class_parts(tw);
+            }
+        }
+        if (node instanceof AST_Defun || node instanceof AST_DefClass) {
+            var node_def = node.name.definition();
+            const in_export = tw.parent() instanceof AST_Export;
+            if (in_export || !drop_funcs && scope === self) {
+                if (node_def.global) {
+                    in_use_ids.set(node_def.id, node_def);
+                }
+            }
+
+            map_add(initializations, node_def.id, node);
+            return true; // don't go in nested scopes
+        }
+        // In the root scope, we drop things. In inner scopes, we just check for uses.
+        const in_root_scope = scope === self;
+        if (node instanceof AST_SymbolFunarg && in_root_scope) {
+            map_add(var_defs_by_id, node.definition().id, node);
+        }
+        if (node instanceof AST_Definitions && in_root_scope) {
+            const in_export = tw.parent() instanceof AST_Export;
+            node.definitions.forEach(function(def) {
+                if (def.name instanceof AST_SymbolVar) {
+                    map_add(var_defs_by_id, def.name.definition().id, def);
+                }
+                if (in_export || !drop_vars) {
+                    walk(def.name, node => {
+                        if (node instanceof AST_SymbolDeclaration) {
+                            const def = node.definition();
+                            if (def.global) {
+                                in_use_ids.set(def.id, def);
+                            }
+                        }
+                    });
+                }
+                if (def.name instanceof AST_Destructuring) {
+                    def.walk(tw);
+                }
+                if (def.name instanceof AST_SymbolDeclaration && def.value) {
+                    var node_def = def.name.definition();
+                    map_add(initializations, node_def.id, def.value);
+                    if (!node_def.chained && def.name.fixed_value() === def.value) {
+                        fixed_ids.set(node_def.id, def);
+                    }
+                    if (def.value.has_side_effects(compressor)) {
+                        def.value.walk(tw);
+                    }
+                }
+            });
+            return true;
+        }
+        return scan_ref_scoped(node, descend);
+    });
+    self.walk(tw);
+
+    // pass 2: for every used symbol we need to walk its
+    // initialization code to figure out if it uses other
+    // symbols (that may not be in_use).
+    tw = new TreeWalker(scan_ref_scoped);
+    in_use_ids.forEach(function (def) {
+        var init = initializations.get(def.id);
+        if (init) init.forEach(function(init) {
+            init.walk(tw);
+        });
+    });
+
+    // pass 3: we should drop declarations not in_use
+    var tt = new TreeTransformer(
+        function before(node, descend, in_list) {
+            var parent = tt.parent();
+            if (drop_vars) {
+                const sym = assign_as_unused(node);
+                if (sym instanceof AST_SymbolRef) {
+                    var def = sym.definition();
+                    var in_use = in_use_ids.has(def.id);
+                    if (node instanceof AST_Assign) {
+                        if (!in_use || fixed_ids.has(def.id) && fixed_ids.get(def.id) !== node) {
+                            const assignee = node.right.transform(tt);
+                            if (!in_use && !assignee.has_side_effects(compressor) && !is_used_in_expression(tt)) {
+                                return in_list ? MAP.skip : make_node(AST_Number, node, { value: 0 });
+                            }
+                            return maintain_this_binding(parent, node, assignee);
+                        }
+                    } else if (!in_use) {
+                        return in_list ? MAP.skip : make_node(AST_Number, node, { value: 0 });
+                    }
+                }
+            }
+            if (scope !== self) return;
+            var def;
+            if (node.name
+                && (node instanceof AST_ClassExpression
+                    && !keep_name(compressor.option("keep_classnames"), (def = node.name.definition()).name)
+                || node instanceof AST_Function
+                    && !keep_name(compressor.option("keep_fnames"), (def = node.name.definition()).name))) {
+                // any declarations with same name will overshadow
+                // name of this anonymous function and can therefore
+                // never be used anywhere
+                if (!in_use_ids.has(def.id) || def.orig.length > 1) node.name = null;
+            }
+            if (node instanceof AST_Lambda && !(node instanceof AST_Accessor)) {
+                var trim =
+                    !compressor.option("keep_fargs")
+                    // Is this an IIFE that won't refer to its name?
+                    || parent instanceof AST_Call
+                        && parent.expression === node
+                        && !node.pinned()
+                        && (!node.name || node.name.unreferenced());
+                for (var a = node.argnames, i = a.length; --i >= 0;) {
+                    var sym = a[i];
+                    if (sym instanceof AST_Expansion) {
+                        sym = sym.expression;
+                    }
+                    if (sym instanceof AST_DefaultAssign) {
+                        sym = sym.left;
+                    }
+                    // Do not drop destructuring arguments.
+                    // They constitute a type assertion of sorts
+                    if (
+                        !(sym instanceof AST_Destructuring)
+                        && !in_use_ids.has(sym.definition().id)
+                    ) {
+                        set_flag(sym, UNUSED);
+                        if (trim) {
+                            a.pop();
+                        }
+                    } else {
+                        trim = false;
+                    }
+                }
+            }
+            if (node instanceof AST_DefClass && node !== self) {
+                const def = node.name.definition();
+                descend(node, this);
+                const keep_class = def.global && !drop_funcs || in_use_ids.has(def.id);
+                if (!keep_class) {
+                    const kept = node.drop_side_effect_free(compressor);
+                    if (kept == null) {
+                        def.eliminated++;
+                        return in_list ? MAP.skip : make_node(AST_EmptyStatement, node);
+                    }
+                    return kept;
+                }
+                return node;
+            }
+            if (node instanceof AST_Defun && node !== self) {
+                const def = node.name.definition();
+                const keep = def.global && !drop_funcs || in_use_ids.has(def.id);
+                if (!keep) {
+                    def.eliminated++;
+                    return in_list ? MAP.skip : make_node(AST_EmptyStatement, node);
+                }
+            }
+            if (node instanceof AST_Definitions && !(parent instanceof AST_ForIn && parent.init === node)) {
+                var drop_block = !(parent instanceof AST_Toplevel) && !(node instanceof AST_Var);
+                // place uninitialized names at the start
+                var body = [], head = [], tail = [];
+                // for unused names whose initialization has
+                // side effects, we can cascade the init. code
+                // into the next one, or next statement.
+                var side_effects = [];
+                node.definitions.forEach(function(def) {
+                    if (def.value) def.value = def.value.transform(tt);
+                    var is_destructure = def.name instanceof AST_Destructuring;
+                    var sym = is_destructure
+                        ? new SymbolDef(null, { name: "<destructure>" }) /* fake SymbolDef */
+                        : def.name.definition();
+                    if (drop_block && sym.global) return tail.push(def);
+                    if (!(drop_vars || drop_block)
+                        || is_destructure
+                            && (def.name.names.length
+                                || def.name.is_array
+                                || compressor.option("pure_getters") != true)
+                        || in_use_ids.has(sym.id)
+                    ) {
+                        if (def.value && fixed_ids.has(sym.id) && fixed_ids.get(sym.id) !== def) {
+                            def.value = def.value.drop_side_effect_free(compressor);
+                        }
+                        if (def.name instanceof AST_SymbolVar) {
+                            var var_defs = var_defs_by_id.get(sym.id);
+                            if (var_defs.length > 1 && (!def.value || sym.orig.indexOf(def.name) > sym.eliminated)) {
+                                if (def.value) {
+                                    var ref = make_node(AST_SymbolRef, def.name, def.name);
+                                    sym.references.push(ref);
+                                    var assign = make_node(AST_Assign, def, {
+                                        operator: "=",
+                                        logical: false,
+                                        left: ref,
+                                        right: def.value
+                                    });
+                                    if (fixed_ids.get(sym.id) === def) {
+                                        fixed_ids.set(sym.id, assign);
+                                    }
+                                    side_effects.push(assign.transform(tt));
+                                }
+                                remove(var_defs, def);
+                                sym.eliminated++;
+                                return;
+                            }
+                        }
+                        if (def.value) {
+                            if (side_effects.length > 0) {
+                                if (tail.length > 0) {
+                                    side_effects.push(def.value);
+                                    def.value = make_sequence(def.value, side_effects);
+                                } else {
+                                    body.push(make_node(AST_SimpleStatement, node, {
+                                        body: make_sequence(node, side_effects)
+                                    }));
+                                }
+                                side_effects = [];
+                            }
+                            tail.push(def);
+                        } else {
+                            head.push(def);
+                        }
+                    } else if (sym.orig[0] instanceof AST_SymbolCatch) {
+                        var value = def.value && def.value.drop_side_effect_free(compressor);
+                        if (value) side_effects.push(value);
+                        def.value = null;
+                        head.push(def);
+                    } else {
+                        var value = def.value && def.value.drop_side_effect_free(compressor);
+                        if (value) {
+                            side_effects.push(value);
+                        }
+                        sym.eliminated++;
+                    }
+                });
+                if (head.length > 0 || tail.length > 0) {
+                    node.definitions = head.concat(tail);
+                    body.push(node);
+                }
+                if (side_effects.length > 0) {
+                    body.push(make_node(AST_SimpleStatement, node, {
+                        body: make_sequence(node, side_effects)
+                    }));
+                }
+                switch (body.length) {
+                  case 0:
+                    return in_list ? MAP.skip : make_node(AST_EmptyStatement, node);
+                  case 1:
+                    return body[0];
+                  default:
+                    return in_list ? MAP.splice(body) : make_node(AST_BlockStatement, node, { body });
+                }
+            }
+            // certain combination of unused name + side effect leads to:
+            //    https://github.com/mishoo/UglifyJS2/issues/44
+            //    https://github.com/mishoo/UglifyJS2/issues/1830
+            //    https://github.com/mishoo/UglifyJS2/issues/1838
+            // that's an invalid AST.
+            // We fix it at this stage by moving the `var` outside the `for`.
+            if (node instanceof AST_For) {
+                descend(node, this);
+                var block;
+                if (node.init instanceof AST_BlockStatement) {
+                    block = node.init;
+                    node.init = block.body.pop();
+                    block.body.push(node);
+                }
+                if (node.init instanceof AST_SimpleStatement) {
+                    node.init = node.init.body;
+                } else if (is_empty(node.init)) {
+                    node.init = null;
+                }
+                return !block ? node : in_list ? MAP.splice(block.body) : block;
+            }
+            if (node instanceof AST_LabeledStatement
+                && node.body instanceof AST_For
+            ) {
+                descend(node, this);
+                if (node.body instanceof AST_BlockStatement) {
+                    var block = node.body;
+                    node.body = block.body.pop();
+                    block.body.push(node);
+                    return in_list ? MAP.splice(block.body) : block;
+                }
+                return node;
+            }
+            if (node instanceof AST_BlockStatement) {
+                descend(node, this);
+                if (in_list && node.body.every(can_be_evicted_from_block)) {
+                    return MAP.splice(node.body);
+                }
+                return node;
+            }
+            if (node instanceof AST_Scope && !(node instanceof AST_ClassStaticBlock)) {
+                const save_scope = scope;
+                scope = node;
+                descend(node, this);
+                scope = save_scope;
+                return node;
+            }
+        },
+        function after(node, in_list) {
+            if (node instanceof AST_Sequence) {
+                switch (node.expressions.length) {
+                    case 0: return in_list ? MAP.skip : make_node(AST_Number, node, { value: 0 });
+                    case 1: return node.expressions[0];
+                }
+            }
+        }
+    );
+
+    self.transform(tt);
+
+    function scan_ref_scoped(node, descend) {
+        var node_def;
+        const sym = assign_as_unused(node);
+        if (sym instanceof AST_SymbolRef
+            && !is_ref_of(node.left, AST_SymbolBlockDeclaration)
+            && self.variables.get(sym.name) === (node_def = sym.definition())
+        ) {
+            if (node instanceof AST_Assign) {
+                node.right.walk(tw);
+                if (!node_def.chained && node.left.fixed_value() === node.right) {
+                    fixed_ids.set(node_def.id, node);
+                }
+            }
+            return true;
+        }
+        if (node instanceof AST_SymbolRef) {
+            node_def = node.definition();
+            if (!in_use_ids.has(node_def.id)) {
+                in_use_ids.set(node_def.id, node_def);
+                if (node_def.orig[0] instanceof AST_SymbolCatch) {
+                    const redef = node_def.scope.is_block_scope()
+                        && node_def.scope.get_defun_scope().variables.get(node_def.name);
+                    if (redef) in_use_ids.set(redef.id, redef);
+                }
+            }
+            return true;
+        }
+        if (node instanceof AST_Class) {
+            descend();
+            return true;
+        }
+        if (node instanceof AST_Scope && !(node instanceof AST_ClassStaticBlock)) {
+            var save_scope = scope;
+            scope = node;
+            descend();
+            scope = save_scope;
+            return true;
+        }
+    }
+});
Index: frontend/node_modules/terser/lib/compress/evaluate.js
===================================================================
--- frontend/node_modules/terser/lib/compress/evaluate.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/compress/evaluate.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,527 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+import {
+    HOP,
+    makePredicate,
+    return_this,
+    string_template,
+    regexp_source_fix,
+    regexp_is_safe,
+} from "../utils/index.js";
+import {
+    AST_Array,
+    AST_BigInt,
+    AST_Binary,
+    AST_Call,
+    AST_Chain,
+    AST_Class,
+    AST_Conditional,
+    AST_Constant,
+    AST_Dot,
+    AST_Expansion,
+    AST_Function,
+    AST_Lambda,
+    AST_New,
+    AST_Node,
+    AST_Object,
+    AST_PropAccess,
+    AST_RegExp,
+    AST_Statement,
+    AST_Symbol,
+    AST_SymbolRef,
+    AST_TemplateString,
+    AST_UnaryPrefix,
+    AST_With,
+} from "../ast.js";
+import { is_undeclared_ref} from "./inference.js";
+
+// methods to evaluate a constant expression
+
+function def_eval(node, func) {
+    node.DEFMETHOD("_eval", func);
+}
+
+// Used to propagate a nullish short-circuit signal upwards through the chain.
+export const nullish = Symbol("This AST_Chain is nullish");
+
+// If the node has been successfully reduced to a constant,
+// then its value is returned; otherwise the element itself
+// is returned.
+// They can be distinguished as constant value is never a
+// descendant of AST_Node.
+AST_Node.DEFMETHOD("evaluate", function (compressor) {
+    if (!compressor.option("evaluate"))
+        return this;
+    var val = this._eval(compressor, 1);
+    if (!val || val instanceof RegExp)
+        return val;
+    if (typeof val == "function" || typeof val == "object" || val == nullish)
+        return this;
+
+    // Evaluated strings can be larger than the original expression
+    if (typeof val === "string") {
+        const unevaluated_size = this.size(compressor);
+        if (val.length + 2 > unevaluated_size) return this;
+    }
+
+    return val;
+});
+
+var unaryPrefix = makePredicate("! ~ - + void");
+AST_Node.DEFMETHOD("is_constant", function () {
+    // Accomodate when compress option evaluate=false
+    // as well as the common constant expressions !0 and -1
+    if (this instanceof AST_Constant) {
+        return !(this instanceof AST_RegExp);
+    } else {
+        return this instanceof AST_UnaryPrefix
+            && unaryPrefix.has(this.operator)
+            && (
+                // `this.expression` may be an `AST_RegExp`,
+                // so not only `.is_constant()`.
+                this.expression instanceof AST_Constant
+                || this.expression.is_constant()
+            );
+    }
+});
+
+def_eval(AST_Statement, function () {
+    throw new Error(string_template("Cannot evaluate a statement [{file}:{line},{col}]", this.start));
+});
+
+def_eval(AST_Lambda, return_this);
+def_eval(AST_Class, return_this);
+def_eval(AST_Node, return_this);
+def_eval(AST_Constant, function () {
+    return this.getValue();
+});
+
+const supports_bigint = typeof BigInt === "function";
+def_eval(AST_BigInt, function () {
+    if (supports_bigint) {
+        return BigInt(this.value);
+    } else {
+        return this;
+    }
+});
+
+def_eval(AST_RegExp, function (compressor) {
+    let evaluated = compressor.evaluated_regexps.get(this.value);
+    if (evaluated === undefined && regexp_is_safe(this.value.source)) {
+        try {
+            const { source, flags } = this.value;
+            evaluated = new RegExp(source, flags);
+        } catch (e) {
+            evaluated = null;
+        }
+        compressor.evaluated_regexps.set(this.value, evaluated);
+    }
+    return evaluated || this;
+});
+
+def_eval(AST_TemplateString, function () {
+    if (this.segments.length !== 1) return this;
+    return this.segments[0].value;
+});
+
+def_eval(AST_Function, function (compressor) {
+    if (compressor.option("unsafe")) {
+        var fn = function () { };
+        fn.node = this;
+        fn.toString = () => this.print_to_string();
+        return fn;
+    }
+    return this;
+});
+
+def_eval(AST_Array, function (compressor, depth) {
+    if (compressor.option("unsafe")) {
+        var elements = [];
+        for (var i = 0, len = this.elements.length; i < len; i++) {
+            var element = this.elements[i];
+            var value = element._eval(compressor, depth);
+            if (element === value)
+                return this;
+            elements.push(value);
+        }
+        return elements;
+    }
+    return this;
+});
+
+def_eval(AST_Object, function (compressor, depth) {
+    if (compressor.option("unsafe")) {
+        var val = {};
+        for (var i = 0, len = this.properties.length; i < len; i++) {
+            var prop = this.properties[i];
+            if (prop instanceof AST_Expansion)
+                return this;
+            var key = prop.key;
+            if (key instanceof AST_Symbol) {
+                key = key.name;
+            } else if (key instanceof AST_Node) {
+                key = key._eval(compressor, depth);
+                if (key === prop.key)
+                    return this;
+            }
+            if (typeof Object.prototype[key] === "function") {
+                return this;
+            }
+            if (prop.value instanceof AST_Function)
+                continue;
+            val[key] = prop.value._eval(compressor, depth);
+            if (val[key] === prop.value)
+                return this;
+        }
+        return val;
+    }
+    return this;
+});
+
+var non_converting_unary = makePredicate("! typeof void");
+def_eval(AST_UnaryPrefix, function (compressor, depth) {
+    var e = this.expression;
+    if (compressor.option("typeofs")
+        && this.operator == "typeof") {
+        // Function would be evaluated to an array and so typeof would
+        // incorrectly return 'object'. Hence making is a special case.
+        if (e instanceof AST_Lambda
+            || e instanceof AST_SymbolRef
+            && e.fixed_value() instanceof AST_Lambda) {
+            return typeof function () { };
+        }
+        if (
+            (e instanceof AST_Object
+                || e instanceof AST_Array
+                || (e instanceof AST_SymbolRef
+                    && (e.fixed_value() instanceof AST_Object
+                        || e.fixed_value() instanceof AST_Array)))
+            && !e.has_side_effects(compressor)
+        ) {
+            return typeof {};
+        }
+    }
+    if (!non_converting_unary.has(this.operator))
+        depth++;
+    e = e._eval(compressor, depth);
+    if (e === this.expression)
+        return this;
+    switch (this.operator) {
+        case "!": return !e;
+        case "typeof":
+            // typeof <RegExp> returns "object" or "function" on different platforms
+            // so cannot evaluate reliably
+            if (e instanceof RegExp)
+                return this;
+            return typeof e;
+        case "void": return void e;
+        case "~": return ~e;
+        case "-": return -e;
+        case "+": return +e;
+    }
+    return this;
+});
+
+var non_converting_binary = makePredicate("&& || ?? === !==");
+const identity_comparison = makePredicate("== != === !==");
+const has_identity = value => typeof value === "object"
+    || typeof value === "function"
+    || typeof value === "symbol";
+
+def_eval(AST_Binary, function (compressor, depth) {
+    if (!non_converting_binary.has(this.operator))
+        depth++;
+
+    var left = this.left._eval(compressor, depth);
+    if (left === this.left)
+        return this;
+    var right = this.right._eval(compressor, depth);
+    if (right === this.right)
+        return this;
+
+    if (left != null
+        && right != null
+        && identity_comparison.has(this.operator)
+        && has_identity(left)
+        && has_identity(right)
+        && typeof left === typeof right) {
+        // Do not compare by reference
+        return this;
+    }
+
+    // Do not mix BigInt and Number; Don't use `>>>` on BigInt or `/ 0n`
+    if (
+        (typeof left === "bigint") !== (typeof right === "bigint")
+        || typeof left === "bigint"
+            && (this.operator === ">>>"
+                || this.operator === "/" && Number(right) === 0)
+    ) {
+        return this;
+    }
+
+    var result;
+    switch (this.operator) {
+        case "&&": result = left && right; break;
+        case "||": result = left || right; break;
+        case "??": result = left != null ? left : right; break;
+        case "|": result = left | right; break;
+        case "&": result = left & right; break;
+        case "^": result = left ^ right; break;
+        case "+": result = left + right; break;
+        case "*": result = left * right; break;
+        case "**": result = left ** right; break;
+        case "/": result = left / right; break;
+        case "%": result = left % right; break;
+        case "-": result = left - right; break;
+        case "<<": result = left << right; break;
+        case ">>": result = left >> right; break;
+        case ">>>": result = left >>> right; break;
+        case "==": result = left == right; break;
+        case "===": result = left === right; break;
+        case "!=": result = left != right; break;
+        case "!==": result = left !== right; break;
+        case "<": result = left < right; break;
+        case "<=": result = left <= right; break;
+        case ">": result = left > right; break;
+        case ">=": result = left >= right; break;
+        default:
+            return this;
+    }
+    if (typeof result === "number" && isNaN(result) && compressor.find_parent(AST_With)) {
+        // leave original expression as is
+        return this;
+    }
+    return result;
+});
+
+def_eval(AST_Conditional, function (compressor, depth) {
+    var condition = this.condition._eval(compressor, depth);
+    if (condition === this.condition)
+        return this;
+    var node = condition ? this.consequent : this.alternative;
+    var value = node._eval(compressor, depth);
+    return value === node ? this : value;
+});
+
+// Set of AST_SymbolRef which are currently being evaluated.
+// Avoids infinite recursion of ._eval()
+const reentrant_ref_eval = new Set();
+def_eval(AST_SymbolRef, function (compressor, depth) {
+    if (reentrant_ref_eval.has(this))
+        return this;
+
+    var fixed = this.fixed_value();
+    if (!fixed)
+        return this;
+
+    reentrant_ref_eval.add(this);
+    const value = fixed._eval(compressor, depth);
+    reentrant_ref_eval.delete(this);
+
+    if (value === fixed)
+        return this;
+
+    if (value && typeof value == "object") {
+        var escaped = this.definition().escaped;
+        if (escaped && depth > escaped)
+            return this;
+    }
+    return value;
+});
+
+def_eval(AST_Chain, function (compressor, depth) {
+    const evaluated = this.expression._eval(compressor, depth, /*ast_chain=*/true);
+    return evaluated === nullish
+        ? undefined
+        : evaluated === this.expression
+          ? this
+          : evaluated;
+});
+
+const global_objs = { Array, Math, Number, Object, String };
+
+const regexp_flags = new Set([
+    "dotAll",
+    "global",
+    "ignoreCase",
+    "multiline",
+    "sticky",
+    "unicode",
+]);
+
+def_eval(AST_PropAccess, function (compressor, depth, ast_chain) {
+    let obj = (ast_chain || this.property === "length" || compressor.option("unsafe"))
+        && this.expression._eval(compressor, depth + 1, ast_chain);
+
+    if (ast_chain) {
+        if (obj === nullish || (this.optional && obj == null)) return nullish;
+    }
+
+    // `.length` of strings and arrays is always safe
+    if (this.property === "length") {
+        if (typeof obj === "string") {
+            return obj.length;
+        }
+
+        const is_spreadless_array =
+            obj instanceof AST_Array
+            && obj.elements.every(el => !(el instanceof AST_Expansion));
+
+        if (
+            is_spreadless_array
+            && obj.elements.every(el => !el.has_side_effects(compressor))
+        ) {
+            return obj.elements.length;
+        }
+    }
+
+    if (compressor.option("unsafe")) {
+        var key = this.property;
+        if (key instanceof AST_Node) {
+            key = key._eval(compressor, depth);
+            if (key === this.property)
+                return this;
+        }
+
+        var exp = this.expression;
+        if (is_undeclared_ref(exp)) {
+            var aa;
+            var first_arg = exp.name === "hasOwnProperty"
+                && key === "call"
+                && (aa = compressor.parent() && compressor.parent().args)
+                && (aa && aa[0]
+                    && aa[0].evaluate(compressor));
+
+            first_arg = first_arg instanceof AST_Dot ? first_arg.expression : first_arg;
+
+            if (first_arg == null || first_arg.thedef && first_arg.thedef.undeclared) {
+                return this.clone();
+            }
+            if (!compressor.is_pure_native_static_property(exp.name, key))
+                return this;
+            obj = global_objs[exp.name];
+        } else {
+            if (obj instanceof RegExp) {
+                if (key == "source") {
+                    return regexp_source_fix(obj.source);
+                } else if (key == "flags" || regexp_flags.has(key)) {
+                    return obj[key];
+                }
+            }
+            if (!obj || obj === exp || !HOP(obj, key))
+                return this;
+
+            if (typeof obj == "function")
+                switch (key) {
+                    case "name":
+                        return obj.node.name ? obj.node.name.name : "";
+                    case "length":
+                        return obj.node.length_property();
+                    default:
+                        return this;
+                }
+        }
+        return obj[key];
+    }
+    return this;
+});
+
+def_eval(AST_Call, function (compressor, depth, ast_chain) {
+    var exp = this.expression;
+
+    if (ast_chain) {
+        const callee = exp._eval(compressor, depth, ast_chain);
+        if (callee === nullish || (this.optional && callee == null)) return nullish;
+    }
+
+    if (compressor.option("unsafe") && exp instanceof AST_PropAccess) {
+        var key = exp.property;
+        if (key instanceof AST_Node) {
+            key = key._eval(compressor, depth);
+            if (typeof key !== "string" && typeof key !== "number")
+                return this;
+        }
+        var val;
+        var e = exp.expression;
+        if (is_undeclared_ref(e)) {
+            var first_arg = e.name === "hasOwnProperty" &&
+                key === "call" &&
+                (this.args[0] && this.args[0].evaluate(compressor));
+
+            first_arg = first_arg instanceof AST_Dot ? first_arg.expression : first_arg;
+
+            if ((first_arg == null || first_arg.thedef && first_arg.thedef.undeclared)) {
+                return this.clone();
+            }
+            if (!compressor.is_pure_native_static_fn(e.name, key)) return this;
+            val = global_objs[e.name];
+        } else {
+            val = e._eval(compressor, depth + 1, /* don't pass ast_chain (exponential work) */);
+
+            if (val === e || !val)
+                return this;
+            if (!compressor.is_pure_native_method(val.constructor.name, key))
+                return this;
+        }
+        var args = [];
+        for (var i = 0, len = this.args.length; i < len; i++) {
+            var arg = this.args[i];
+            var value = arg._eval(compressor, depth);
+            if (arg === value)
+                return this;
+            if (arg instanceof AST_Lambda)
+                return this;
+            args.push(value);
+        }
+        try {
+            return val[key].apply(val, args);
+        } catch (ex) {
+            // We don't really care
+        }
+    }
+    return this;
+});
+
+// Also a subclass of AST_Call
+def_eval(AST_New, return_this);
Index: frontend/node_modules/terser/lib/compress/global-defs.js
===================================================================
--- frontend/node_modules/terser/lib/compress/global-defs.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/compress/global-defs.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,92 @@
+import {
+    AST_Array,
+    AST_Chain,
+    AST_Constant,
+    AST_Dot,
+    AST_ImportMeta,
+    AST_Node,
+    AST_Object,
+    AST_ObjectKeyVal,
+    AST_PropAccess,
+    AST_SymbolDeclaration,
+    AST_SymbolRef,
+    AST_Toplevel,
+    TreeTransformer,
+} from "../ast.js";
+import { make_node, noop, HOP } from "../utils/index.js";
+import { make_node_from_constant } from "./common.js";
+import { is_lhs } from "./inference.js";
+
+(function(def_find_defs) {
+    function to_node(value, orig) {
+        if (value instanceof AST_Node) {
+            if (!(value instanceof AST_Constant)) {
+                // Value may be a function, an array including functions and even a complex assign / block expression,
+                // so it should never be shared in different places.
+                // Otherwise wrong information may be used in the compression phase
+                value = value.clone(true);
+            }
+            return make_node(value.CTOR, orig, value);
+        }
+        if (Array.isArray(value)) return make_node(AST_Array, orig, {
+            elements: value.map(function(value) {
+                return to_node(value, orig);
+            })
+        });
+        if (value && typeof value == "object") {
+            var props = [];
+            for (var key in value) if (HOP(value, key)) {
+                props.push(make_node(AST_ObjectKeyVal, orig, {
+                    key: key,
+                    value: to_node(value[key], orig)
+                }));
+            }
+            return make_node(AST_Object, orig, {
+                properties: props
+            });
+        }
+        return make_node_from_constant(value, orig);
+    }
+
+    AST_Toplevel.DEFMETHOD("resolve_defines", function(compressor) {
+        if (!compressor.option("global_defs")) return this;
+        this.figure_out_scope({ ie8: compressor.option("ie8") });
+        return this.transform(new TreeTransformer(function(node) {
+            var def = node._find_defs(compressor, "");
+            if (!def) return;
+            var level = 0, child = node, parent;
+            while (parent = this.parent(level++)) {
+                if (!(parent instanceof AST_PropAccess)) break;
+                if (parent.expression !== child) break;
+                child = parent;
+            }
+            if (is_lhs(child, parent)) {
+                return;
+            }
+            return def;
+        }));
+    });
+    def_find_defs(AST_Node, noop);
+    def_find_defs(AST_Chain, function(compressor, suffix) {
+        return this.expression._find_defs(compressor, suffix);
+    });
+    def_find_defs(AST_Dot, function(compressor, suffix) {
+        return this.expression._find_defs(compressor, "." + this.property + suffix);
+    });
+    def_find_defs(AST_SymbolDeclaration, function() {
+        if (!this.global()) return;
+    });
+    def_find_defs(AST_SymbolRef, function(compressor, suffix) {
+        if (!this.global()) return;
+        var defines = compressor.option("global_defs");
+        var name = this.name + suffix;
+        if (HOP(defines, name)) return to_node(defines[name], this);
+    });
+    def_find_defs(AST_ImportMeta, function(compressor, suffix) {
+        var defines = compressor.option("global_defs");
+        var name = "import.meta" + suffix;
+        if (HOP(defines, name)) return to_node(defines[name], this);
+    });
+})(function(node, func) {
+    node.DEFMETHOD("_find_defs", func);
+});
Index: frontend/node_modules/terser/lib/compress/index.js
===================================================================
--- frontend/node_modules/terser/lib/compress/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/compress/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,4136 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+import {
+    AST_Accessor,
+    AST_Array,
+    AST_Arrow,
+    AST_Assign,
+    AST_BigInt,
+    AST_Binary,
+    AST_Block,
+    AST_BlockStatement,
+    AST_Boolean,
+    AST_Break,
+    AST_Call,
+    AST_Catch,
+    AST_Chain,
+    AST_Class,
+    AST_ClassProperty,
+    AST_ClassStaticBlock,
+    AST_ConciseMethod,
+    AST_Conditional,
+    AST_Const,
+    AST_Constant,
+    AST_Debugger,
+    AST_Default,
+    AST_DefaultAssign,
+    AST_Definitions,
+    AST_Defun,
+    AST_Destructuring,
+    AST_Directive,
+    AST_Do,
+    AST_Dot,
+    AST_DotHash,
+    AST_DWLoop,
+    AST_EmptyStatement,
+    AST_Exit,
+    AST_Expansion,
+    AST_Export,
+    AST_False,
+    AST_For,
+    AST_ForIn,
+    AST_Function,
+    AST_Hole,
+    AST_If,
+    AST_Import,
+    AST_Infinity,
+    AST_LabeledStatement,
+    AST_Lambda,
+    AST_Let,
+    AST_NaN,
+    AST_New,
+    AST_Node,
+    AST_Null,
+    AST_Number,
+    AST_Object,
+    AST_ObjectKeyVal,
+    AST_ObjectProperty,
+    AST_PrefixedTemplateString,
+    AST_PropAccess,
+    AST_RegExp,
+    AST_Return,
+    AST_Scope,
+    AST_Sequence,
+    AST_SimpleStatement,
+    AST_Statement,
+    AST_String,
+    AST_Sub,
+    AST_Switch,
+    AST_SwitchBranch,
+    AST_Symbol,
+    AST_SymbolClassProperty,
+    AST_SymbolDeclaration,
+    AST_SymbolDefun,
+    AST_SymbolExport,
+    AST_SymbolFunarg,
+    AST_SymbolLambda,
+    AST_SymbolLet,
+    AST_SymbolMethod,
+    AST_SymbolRef,
+    AST_SymbolUsing,
+    AST_TemplateString,
+    AST_This,
+    AST_Toplevel,
+    AST_True,
+    AST_Try,
+    AST_Unary,
+    AST_UnaryPostfix,
+    AST_UnaryPrefix,
+    AST_Undefined,
+    AST_Using,
+    AST_Var,
+    AST_VarDef,
+    AST_While,
+    AST_With,
+    AST_Yield,
+
+    TreeTransformer,
+    TreeWalker,
+    walk,
+    walk_abort,
+
+    _NOINLINE,
+} from "../ast.js";
+import {
+    defaults,
+    HOP,
+    make_node,
+    make_void_0,
+    makePredicate,
+    MAP,
+    remove,
+    return_false,
+    return_true,
+    regexp_source_fix,
+    has_annotation,
+    regexp_is_safe,
+} from "../utils/index.js";
+import { first_in_statement } from "../utils/first_in_statement.js";
+import { equivalent_to } from "../equivalent-to.js";
+import {
+    is_basic_identifier_string,
+    JS_Parse_Error,
+    parse,
+    PRECEDENCE,
+} from "../parse.js";
+import { OutputStream } from "../output.js";
+import { base54, format_mangler_options } from "../scope.js";
+import "../size.js";
+
+import "./evaluate.js";
+import "./drop-side-effect-free.js";
+import "./drop-unused.js";
+import "./reduce-vars.js";
+import {
+    is_undeclared_ref,
+    bitwise_binop,
+    lazy_op,
+    is_nullish,
+    is_undefined,
+    is_lhs,
+    aborts,
+    is_used_in_expression,
+} from "./inference.js";
+import {
+    SQUEEZED,
+    OPTIMIZED,
+    CLEAR_BETWEEN_PASSES,
+    TOP,
+    UNDEFINED,
+    UNUSED,
+    TRUTHY,
+    FALSY,
+    has_flag,
+    set_flag,
+    clear_flag,
+} from "./compressor-flags.js";
+import {
+    make_sequence,
+    best_of,
+    best_of_expression,
+    make_empty_function,
+    make_node_from_constant,
+    merge_sequence,
+    get_simple_key,
+    has_break_or_continue,
+    maintain_this_binding,
+    is_empty,
+    is_identifier_atom,
+    is_reachable,
+    can_be_evicted_from_block,
+    as_statement_array,
+    is_func_expr,
+} from "./common.js";
+import { tighten_body, extract_from_unreachable_code } from "./tighten-body.js";
+import { inline_into_symbolref, inline_into_call } from "./inline.js";
+import "./global-defs.js";
+import { is_pure_native_fn, is_pure_native_method, is_pure_native_static_fn, is_pure_native_static_property, pure_access_globals } from "./native-objects.js";
+
+class Compressor extends TreeWalker {
+    constructor(options, { false_by_default = false, mangle_options = false }) {
+        super();
+        if (options.defaults !== undefined && !options.defaults) false_by_default = true;
+        this.options = defaults(options, {
+            arguments     : false,
+            arrows        : !false_by_default,
+            booleans      : !false_by_default,
+            booleans_as_integers : false,
+            collapse_vars : !false_by_default,
+            comparisons   : !false_by_default,
+            computed_props: !false_by_default,
+            conditionals  : !false_by_default,
+            dead_code     : !false_by_default,
+            defaults      : true,
+            directives    : !false_by_default,
+            drop_console  : false,
+            drop_debugger : !false_by_default,
+            ecma          : 5,
+            builtins_ecma : 5,
+            builtins_pure : false,
+            evaluate      : !false_by_default,
+            expression    : false,
+            global_defs   : false,
+            hoist_funs    : false,
+            hoist_props   : !false_by_default,
+            hoist_vars    : false,
+            ie8           : false,
+            if_return     : !false_by_default,
+            inline        : !false_by_default,
+            join_vars     : !false_by_default,
+            keep_classnames: false,
+            keep_fargs    : true,
+            keep_fnames   : false,
+            keep_infinity : false,
+            lhs_constants : !false_by_default,
+            loops         : !false_by_default,
+            module        : false,
+            negate_iife   : !false_by_default,
+            passes        : 1,
+            properties    : !false_by_default,
+            pure_getters  : !false_by_default && "strict",
+            pure_funcs    : null,
+            pure_new      : false,
+            reduce_funcs  : !false_by_default,
+            reduce_vars   : !false_by_default,
+            sequences     : !false_by_default,
+            side_effects  : !false_by_default,
+            switches      : !false_by_default,
+            top_retain    : null,
+            toplevel      : !!(options && options["top_retain"]),
+            typeofs       : !false_by_default,
+            unsafe        : false,
+            unsafe_arrows : false,
+            unsafe_comps  : false,
+            unsafe_Function: false,
+            unsafe_math   : false,
+            unsafe_symbols: false,
+            unsafe_methods: false,
+            unsafe_proto  : false,
+            unsafe_regexp : false,
+            unsafe_undefined: false,
+            unused        : !false_by_default,
+            warnings      : false  // legacy
+        }, true);
+        var global_defs = this.options["global_defs"];
+        if (typeof global_defs == "object") for (var key in global_defs) {
+            if (key[0] === "@" && HOP(global_defs, key)) {
+                global_defs[key.slice(1)] = parse(global_defs[key], {
+                    expression: true
+                });
+            }
+        }
+        if (this.options["inline"] === true) this.options["inline"] = 3;
+        var pure_funcs = this.options["pure_funcs"];
+        if (typeof pure_funcs == "function") {
+            this.pure_funcs = pure_funcs;
+        } else {
+            this.pure_funcs = pure_funcs ? function(node) {
+                return !pure_funcs.includes(node.expression.print_to_string());
+            } : return_true;
+        }
+        var top_retain = this.options["top_retain"];
+        if (top_retain instanceof RegExp) {
+            this.top_retain = function(def) {
+                return top_retain.test(def.name);
+            };
+        } else if (typeof top_retain == "function") {
+            this.top_retain = top_retain;
+        } else if (top_retain) {
+            if (typeof top_retain == "string") {
+                top_retain = top_retain.split(/,/);
+            }
+            this.top_retain = function(def) {
+                return top_retain.includes(def.name);
+            };
+        }
+        if (this.options["module"]) {
+            this.directives["use strict"] = true;
+            this.options["toplevel"] = true;
+        }
+        var toplevel = this.options["toplevel"];
+        this.toplevel = typeof toplevel == "string" ? {
+            funcs: /funcs/.test(toplevel),
+            vars: /vars/.test(toplevel)
+        } : {
+            funcs: toplevel,
+            vars: toplevel
+        };
+        var sequences = this.options["sequences"];
+        this.sequences_limit = sequences == 1 ? 800 : sequences | 0;
+        this.evaluated_regexps = new Map();
+        this._toplevel = undefined;
+        this._mangle_options = mangle_options
+            ? format_mangler_options(mangle_options)
+            : mangle_options;
+
+        this.pure_access_globals = pure_access_globals(this);
+        this.is_pure_native_fn = is_pure_native_fn(this);
+        this.is_pure_native_method = is_pure_native_method(this);
+        this.is_pure_native_static_fn = is_pure_native_static_fn(this);
+        this.is_pure_native_static_property = is_pure_native_static_property(this);
+    }
+
+    mangle_options() {
+        var nth_identifier = this._mangle_options && this._mangle_options.nth_identifier || base54;
+        var module = this._mangle_options && this._mangle_options.module || this.option("module");
+        return { ie8: this.option("ie8"), nth_identifier, module };
+    }
+
+    option(key) {
+        return this.options[key];
+    }
+
+    exposed(def) {
+        if (def.export) return true;
+        if (def.global) for (var i = 0, len = def.orig.length; i < len; i++)
+            if (!this.toplevel[def.orig[i] instanceof AST_SymbolDefun ? "funcs" : "vars"])
+                return true;
+        return false;
+    }
+
+    in_boolean_context() {
+        if (!this.option("booleans")) return false;
+        var self = this.self();
+        for (var i = 0, p; p = this.parent(i); i++) {
+            if (p instanceof AST_SimpleStatement
+                || p instanceof AST_Conditional && p.condition === self
+                || p instanceof AST_DWLoop && p.condition === self
+                || p instanceof AST_For && p.condition === self
+                || p instanceof AST_If && p.condition === self
+                || p instanceof AST_UnaryPrefix && p.operator == "!" && p.expression === self) {
+                return true;
+            }
+            if (
+                p instanceof AST_Binary
+                    && (
+                        p.operator == "&&"
+                        || p.operator == "||"
+                        || p.operator == "??"
+                    )
+                || p instanceof AST_Conditional
+                || p.tail_node() === self
+            ) {
+                self = p;
+            } else {
+                return false;
+            }
+        }
+    }
+
+    /** True if compressor.self()'s result will be turned into a 32-bit integer.
+     * ex:
+     * ~{expr}
+     * (1, 2, {expr}) | 0
+     **/
+    in_32_bit_context(other_operand_must_be_number) {
+        if (!this.option("evaluate")) return false;
+        var self = this.self();
+        for (var i = 0, p; p = this.parent(i); i++) {
+            if (p instanceof AST_Binary && bitwise_binop.has(p.operator)) {
+                if (other_operand_must_be_number) {
+                    return (self === p.left ? p.right : p.left).is_number(this);
+                } else {
+                    return true;
+                }
+            }
+            if (p instanceof AST_UnaryPrefix) {
+                return p.operator === "~";
+            }
+            if (
+                p instanceof AST_Binary
+                    && (
+                        // Don't talk about p.left. Can change branch taken
+                        p.operator == "&&" && p.right === self
+                        || p.operator == "||" && p.right === self
+                        || p.operator == "??" && p.right === self
+                    )
+                || p instanceof AST_Conditional && p.condition !== self
+                || p.tail_node() === self
+            ) {
+                self = p;
+            } else {
+                return false;
+            }
+        }
+    }
+
+    in_computed_key() {
+        if (!this.option("evaluate")) return false;
+        var self = this.self();
+        for (var i = 0, p; p = this.parent(i); i++) {
+            if (p instanceof AST_ObjectProperty && p.key === self) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    get_toplevel() {
+        return this._toplevel;
+    }
+
+    compress(toplevel) {
+        toplevel = toplevel.resolve_defines(this);
+        this._toplevel = toplevel;
+        if (this.option("expression")) {
+            this._toplevel.process_expression(true);
+        }
+        var passes = +this.options.passes || 1;
+        var min_count = 1 / 0;
+        var stopping = false;
+        var mangle = this.mangle_options();
+        for (var pass = 0; pass < passes; pass++) {
+            this._toplevel.figure_out_scope(mangle);
+            if (pass === 0 && this.option("drop_console")) {
+                // must be run before reduce_vars and compress pass
+                this._toplevel = this._toplevel.drop_console(this.option("drop_console"));
+            }
+            if (pass > 0 || this.option("reduce_vars")) {
+                this._toplevel.reset_opt_flags(this);
+            }
+            this._toplevel = this._toplevel.transform(this);
+            if (passes > 1) {
+                let count = 0;
+                walk(this._toplevel, () => { count++; });
+                if (count < min_count) {
+                    min_count = count;
+                    stopping = false;
+                } else if (stopping) {
+                    break;
+                } else {
+                    stopping = true;
+                }
+            }
+        }
+        if (this.option("expression")) {
+            this._toplevel.process_expression(false);
+        }
+        toplevel = this._toplevel;
+        this._toplevel = undefined;
+        return toplevel;
+    }
+
+    before(node, descend) {
+        if (has_flag(node, SQUEEZED)) return node;
+        var was_scope = false;
+        if (node instanceof AST_Scope) {
+            node = node.hoist_properties(this);
+            node = node.hoist_declarations(this);
+            was_scope = true;
+        }
+        // Before https://github.com/mishoo/UglifyJS2/pull/1602 AST_Node.optimize()
+        // would call AST_Node.transform() if a different instance of AST_Node is
+        // produced after def_optimize().
+        // This corrupts TreeWalker.stack, which cause AST look-ups to malfunction.
+        // Migrate and defer all children's AST_Node.transform() to below, which
+        // will now happen after this parent AST_Node has been properly substituted
+        // thus gives a consistent AST snapshot.
+        descend(node, this);
+        // Existing code relies on how AST_Node.optimize() worked, and omitting the
+        // following replacement call would result in degraded efficiency of both
+        // output and performance.
+        descend(node, this);
+        var opt = node.optimize(this);
+        if (was_scope && opt instanceof AST_Scope) {
+            opt.drop_unused(this);
+            descend(opt, this);
+        }
+        if (opt === node) set_flag(opt, SQUEEZED);
+        return opt;
+    }
+
+    /** Alternative to plain is_lhs() which doesn't work within .optimize() */
+    is_lhs() {
+        const self = this.stack[this.stack.length - 1];
+        const parent = this.stack[this.stack.length - 2];
+        return is_lhs(self, parent);
+    }
+}
+
+
+function def_optimize(node, optimizer) {
+    node.DEFMETHOD("optimize", function(compressor) {
+        var self = this;
+        if (has_flag(self, OPTIMIZED)) return self;
+        if (compressor.has_directive("use asm")) return self;
+        var opt = optimizer(self, compressor);
+        set_flag(opt, OPTIMIZED);
+        return opt;
+    });
+}
+
+def_optimize(AST_Node, function(self) {
+    return self;
+});
+
+AST_Toplevel.DEFMETHOD("drop_console", function(options) {
+    const isArray = Array.isArray(options);
+    const tt = new TreeTransformer(function(self) {
+        if (self.TYPE !== "Call") {
+            return;
+        }
+
+        var exp = self.expression;
+
+        if (!(exp instanceof AST_PropAccess)) {
+            return;
+        }
+
+        var name = exp.expression;
+        var property = exp.property;
+        var depth = 2;
+        while (name.expression) {
+            property = name.property;
+            name = name.expression;
+            depth++;
+        }
+
+        if (isArray && !options.includes(property)) {
+            return;
+        }
+
+        if (is_undeclared_ref(name) && name.name == "console") {
+            if (
+                depth === 3
+                && !["call", "apply"].includes(exp.property)
+                && is_used_in_expression(tt)
+            ) {
+                // a (used) call to Function.prototype methods (eg: console.log.bind(console))
+                // but not .call and .apply which would also return undefined.
+                exp.expression = make_empty_function(self);
+                set_flag(exp.expression, SQUEEZED);
+                self.args = [];
+            } else {
+                return make_void_0(self);
+            }
+        }
+    });
+
+    return this.transform(tt);
+});
+
+AST_Node.DEFMETHOD("equivalent_to", function(node) {
+    return equivalent_to(this, node);
+});
+
+AST_Scope.DEFMETHOD("process_expression", function(insert, compressor) {
+    var self = this;
+    var tt = new TreeTransformer(function(node) {
+        if (insert && node instanceof AST_SimpleStatement) {
+            return make_node(AST_Return, node, {
+                value: node.body
+            });
+        }
+        if (!insert && node instanceof AST_Return) {
+            if (compressor) {
+                var value = node.value && node.value.drop_side_effect_free(compressor, true);
+                return value
+                    ? make_node(AST_SimpleStatement, node, { body: value })
+                    : make_node(AST_EmptyStatement, node);
+            }
+            return make_node(AST_SimpleStatement, node, {
+                body: node.value || make_void_0(node)
+            });
+        }
+        if (node instanceof AST_Class || node instanceof AST_Lambda && node !== self) {
+            return node;
+        }
+        if (node instanceof AST_Block) {
+            var index = node.body.length - 1;
+            if (index >= 0) {
+                node.body[index] = node.body[index].transform(tt);
+            }
+        } else if (node instanceof AST_If) {
+            node.body = node.body.transform(tt);
+            if (node.alternative) {
+                node.alternative = node.alternative.transform(tt);
+            }
+        } else if (node instanceof AST_With) {
+            node.body = node.body.transform(tt);
+        }
+        return node;
+    });
+    self.transform(tt);
+});
+
+AST_Toplevel.DEFMETHOD("reset_opt_flags", function(compressor) {
+    const self = this;
+    const reduce_vars = compressor.option("reduce_vars");
+
+    const preparation = new TreeWalker(function(node, descend) {
+        clear_flag(node, CLEAR_BETWEEN_PASSES);
+        if (reduce_vars) {
+            if (compressor.top_retain
+                && node instanceof AST_Defun  // Only functions are retained
+                && preparation.parent() === self
+            ) {
+                set_flag(node, TOP);
+            }
+            return node.reduce_vars(preparation, descend, compressor);
+        }
+    });
+    // Stack of look-up tables to keep track of whether a `SymbolDef` has been
+    // properly assigned before use:
+    // - `push()` & `pop()` when visiting conditional branches
+    preparation.safe_ids = Object.create(null);
+    preparation.in_loop = null;
+    preparation.loop_ids = new Map();
+    preparation.defs_to_safe_ids = new Map();
+    self.walk(preparation);
+});
+
+AST_Symbol.DEFMETHOD("fixed_value", function() {
+    var fixed = this.thedef.fixed;
+    if (!fixed || fixed instanceof AST_Node) return fixed;
+    return fixed();
+});
+
+AST_SymbolRef.DEFMETHOD("is_immutable", function() {
+    var orig = this.definition().orig;
+    return orig.length == 1 && orig[0] instanceof AST_SymbolLambda;
+});
+
+function find_variable(compressor, name) {
+    var scope, i = 0;
+    while (scope = compressor.parent(i++)) {
+        if (scope instanceof AST_Scope) break;
+        if (scope instanceof AST_Catch && scope.argname) {
+            scope = scope.argname.definition().scope;
+            break;
+        }
+    }
+    return scope.find_variable(name);
+}
+
+AST_SymbolRef.DEFMETHOD("is_declared", function(compressor) {
+    return !this.definition().undeclared
+        || (compressor.option("unsafe") || compressor.option("builtins_pure")) && compressor.pure_access_globals(this.name);
+});
+
+/* -----[ optimizers ]----- */
+
+var directives = new Set(["use asm", "use strict"]);
+def_optimize(AST_Directive, function(self, compressor) {
+    if (compressor.option("directives")
+        && (!directives.has(self.value) || compressor.has_directive(self.value) !== self)) {
+        return make_node(AST_EmptyStatement, self);
+    }
+    return self;
+});
+
+def_optimize(AST_Debugger, function(self, compressor) {
+    if (compressor.option("drop_debugger"))
+        return make_node(AST_EmptyStatement, self);
+    return self;
+});
+
+def_optimize(AST_LabeledStatement, function(self, compressor) {
+    if (self.body instanceof AST_Break
+        && compressor.loopcontrol_target(self.body) === self.body) {
+        return make_node(AST_EmptyStatement, self);
+    }
+    return self.label.references.length == 0 ? self.body : self;
+});
+
+def_optimize(AST_Block, function(self, compressor) {
+    tighten_body(self.body, compressor);
+    return self;
+});
+
+function can_be_extracted_from_if_block(node) {
+    return !(
+        node instanceof AST_Const
+        || node instanceof AST_Let
+        || node instanceof AST_Using
+        || node instanceof AST_Class
+    );
+}
+
+def_optimize(AST_BlockStatement, function(self, compressor) {
+    tighten_body(self.body, compressor);
+    switch (self.body.length) {
+      case 1:
+        if (!compressor.has_directive("use strict")
+            && compressor.parent() instanceof AST_If
+            && can_be_extracted_from_if_block(self.body[0])
+            || can_be_evicted_from_block(self.body[0])) {
+            return self.body[0];
+        }
+        break;
+      case 0: return make_node(AST_EmptyStatement, self);
+    }
+    return self;
+});
+
+function opt_AST_Lambda(self, compressor) {
+    tighten_body(self.body, compressor);
+    if (compressor.option("side_effects")
+        && self.body.length == 1
+        && self.body[0] === compressor.has_directive("use strict")) {
+        self.body.length = 0;
+    }
+    return self;
+}
+def_optimize(AST_Lambda, opt_AST_Lambda);
+
+AST_Scope.DEFMETHOD("hoist_declarations", function(compressor) {
+    var self = this;
+    if (compressor.has_directive("use asm")) return self;
+
+    var hoist_funs = compressor.option("hoist_funs");
+    var hoist_vars = compressor.option("hoist_vars");
+
+    if (hoist_funs || hoist_vars) {
+        var dirs = [];
+        var hoisted = [];
+        var vars = new Map(), vars_found = 0, var_decl = 0;
+        // let's count var_decl first, we seem to waste a lot of
+        // space if we hoist `var` when there's only one.
+        walk(self, node => {
+            if (node instanceof AST_Scope && node !== self)
+                return true;
+            if (node instanceof AST_Var) {
+                ++var_decl;
+                return true;
+            }
+        });
+        hoist_vars = hoist_vars && var_decl > 1;
+        var tt = new TreeTransformer(
+            function before(node) {
+                if (node !== self) {
+                    if (node instanceof AST_Directive) {
+                        dirs.push(node);
+                        return make_node(AST_EmptyStatement, node);
+                    }
+                    if (hoist_funs && node instanceof AST_Defun
+                        && !(tt.parent() instanceof AST_Export)
+                        && tt.parent() === self) {
+                        hoisted.push(node);
+                        return make_node(AST_EmptyStatement, node);
+                    }
+                    if (
+                        hoist_vars
+                        && node instanceof AST_Var
+                        && !node.definitions.some(def => def.name instanceof AST_Destructuring)
+                    ) {
+                        node.definitions.forEach(function(def) {
+                            vars.set(def.name.name, def);
+                            ++vars_found;
+                        });
+                        var seq = node.to_assignments(compressor);
+                        var p = tt.parent();
+                        if (p instanceof AST_ForIn && p.init === node) {
+                            if (seq == null) {
+                                var def = node.definitions[0].name;
+                                return make_node(AST_SymbolRef, def, def);
+                            }
+                            return seq;
+                        }
+                        if (p instanceof AST_For && p.init === node) {
+                            return seq;
+                        }
+                        if (!seq) return make_node(AST_EmptyStatement, node);
+                        return make_node(AST_SimpleStatement, node, {
+                            body: seq
+                        });
+                    }
+                    if (node instanceof AST_Scope)
+                        return node; // to avoid descending in nested scopes
+                }
+            }
+        );
+        self = self.transform(tt);
+        if (vars_found > 0) {
+            // collect only vars which don't show up in self's arguments list
+            var defs = [];
+            const is_lambda = self instanceof AST_Lambda;
+            const args_as_names = is_lambda ? self.args_as_names() : null;
+            vars.forEach((def, name) => {
+                if (is_lambda && args_as_names.some((x) => x.name === def.name.name)) {
+                    vars.delete(name);
+                } else {
+                    def = def.clone();
+                    def.value = null;
+                    defs.push(def);
+                    vars.set(name, def);
+                }
+            });
+            if (defs.length > 0) {
+                // try to merge in assignments
+                for (var i = 0; i < self.body.length;) {
+                    if (self.body[i] instanceof AST_SimpleStatement) {
+                        var expr = self.body[i].body, sym, assign;
+                        if (expr instanceof AST_Assign
+                            && expr.operator == "="
+                            && (sym = expr.left) instanceof AST_Symbol
+                            && vars.has(sym.name)
+                        ) {
+                            var def = vars.get(sym.name);
+                            if (def.value) break;
+                            def.value = expr.right;
+                            remove(defs, def);
+                            defs.push(def);
+                            self.body.splice(i, 1);
+                            continue;
+                        }
+                        if (expr instanceof AST_Sequence
+                            && (assign = expr.expressions[0]) instanceof AST_Assign
+                            && assign.operator == "="
+                            && (sym = assign.left) instanceof AST_Symbol
+                            && vars.has(sym.name)
+                        ) {
+                            var def = vars.get(sym.name);
+                            if (def.value) break;
+                            def.value = assign.right;
+                            remove(defs, def);
+                            defs.push(def);
+                            self.body[i].body = make_sequence(expr, expr.expressions.slice(1));
+                            continue;
+                        }
+                    }
+                    if (self.body[i] instanceof AST_EmptyStatement) {
+                        self.body.splice(i, 1);
+                        continue;
+                    }
+                    if (self.body[i] instanceof AST_BlockStatement) {
+                        self.body.splice(i, 1, ...self.body[i].body);
+                        continue;
+                    }
+                    break;
+                }
+                defs = make_node(AST_Var, self, {
+                    definitions: defs
+                });
+                hoisted.push(defs);
+            }
+        }
+        self.body = dirs.concat(hoisted, self.body);
+    }
+    return self;
+});
+
+AST_Scope.DEFMETHOD("hoist_properties", function(compressor) {
+    var self = this;
+    if (!compressor.option("hoist_props") || compressor.has_directive("use asm")) return self;
+    var top_retain = self instanceof AST_Toplevel && compressor.top_retain || return_false;
+    var defs_by_id = new Map();
+    var hoister = new TreeTransformer(function(node, descend) {
+        if (node instanceof AST_VarDef) {
+            const sym = node.name;
+            let def;
+            let value;
+            if (sym.scope === self
+                && !(sym instanceof AST_SymbolUsing)
+                && (def = sym.definition()).escaped != 1
+                && !def.assignments
+                && !def.direct_access
+                && !def.single_use
+                && !compressor.exposed(def)
+                && !top_retain(def)
+                && (value = sym.fixed_value()) === node.value
+                && value instanceof AST_Object
+                && !value.properties.some(prop =>
+                    prop instanceof AST_Expansion || prop.computed_key()
+                )
+            ) {
+                descend(node, this);
+                const defs = new Map();
+                const assignments = [];
+                value.properties.forEach(({ key, value }) => {
+                    const scope = hoister.find_scope();
+                    const symbol = self.create_symbol(sym.CTOR, {
+                        source: sym,
+                        scope,
+                        conflict_scopes: new Set([
+                            scope,
+                            ...sym.definition().references.map(ref => ref.scope)
+                        ]),
+                        tentative_name: sym.name + "_" + key
+                    });
+
+                    defs.set(String(key), symbol.definition());
+
+                    assignments.push(make_node(AST_VarDef, node, {
+                        name: symbol,
+                        value
+                    }));
+                });
+                defs_by_id.set(def.id, defs);
+                return MAP.splice(assignments);
+            }
+        } else if (node instanceof AST_PropAccess
+            && node.expression instanceof AST_SymbolRef
+        ) {
+            const defs = defs_by_id.get(node.expression.definition().id);
+            if (defs) {
+                const def = defs.get(String(get_simple_key(node.property)));
+                const sym = make_node(AST_SymbolRef, node, {
+                    name: def.name,
+                    scope: node.expression.scope,
+                    thedef: def
+                });
+                sym.reference({});
+                return sym;
+            }
+        }
+    });
+    return self.transform(hoister);
+});
+
+def_optimize(AST_SimpleStatement, function(self, compressor) {
+    if (compressor.option("side_effects")) {
+        var body = self.body;
+        var node = body.drop_side_effect_free(compressor, true);
+        if (!node) {
+            return make_node(AST_EmptyStatement, self);
+        }
+        if (node !== body) {
+            return make_node(AST_SimpleStatement, self, { body: node });
+        }
+    }
+    return self;
+});
+
+def_optimize(AST_While, function(self, compressor) {
+    return compressor.option("loops") ? make_node(AST_For, self, self).optimize(compressor) : self;
+});
+
+def_optimize(AST_Do, function(self, compressor) {
+    if (!compressor.option("loops")) return self;
+    var cond = self.condition.tail_node().evaluate(compressor);
+    if (!(cond instanceof AST_Node)) {
+        if (cond) return make_node(AST_For, self, {
+            body: make_node(AST_BlockStatement, self.body, {
+                body: [
+                    self.body,
+                    make_node(AST_SimpleStatement, self.condition, {
+                        body: self.condition
+                    })
+                ]
+            })
+        }).optimize(compressor);
+        if (!has_break_or_continue(self, compressor.parent())) {
+            return make_node(AST_BlockStatement, self.body, {
+                body: [
+                    self.body,
+                    make_node(AST_SimpleStatement, self.condition, {
+                        body: self.condition
+                    })
+                ]
+            }).optimize(compressor);
+        }
+    }
+    return self;
+});
+
+function if_break_in_loop(self, compressor) {
+    var first = self.body instanceof AST_BlockStatement ? self.body.body[0] : self.body;
+    if (compressor.option("dead_code") && is_break(first)) {
+        var body = [];
+        if (self.init instanceof AST_Statement) {
+            body.push(self.init);
+        } else if (self.init) {
+            body.push(make_node(AST_SimpleStatement, self.init, {
+                body: self.init
+            }));
+        }
+        if (self.condition) {
+            body.push(make_node(AST_SimpleStatement, self.condition, {
+                body: self.condition
+            }));
+        }
+        extract_from_unreachable_code(compressor, self.body, body);
+        return make_node(AST_BlockStatement, self, {
+            body: body
+        });
+    }
+    if (first instanceof AST_If) {
+        if (is_break(first.body)) {
+            if (self.condition) {
+                self.condition = make_node(AST_Binary, self.condition, {
+                    left: self.condition,
+                    operator: "&&",
+                    right: first.condition.negate(compressor),
+                });
+            } else {
+                self.condition = first.condition.negate(compressor);
+            }
+            drop_it(first.alternative);
+        } else if (is_break(first.alternative)) {
+            if (self.condition) {
+                self.condition = make_node(AST_Binary, self.condition, {
+                    left: self.condition,
+                    operator: "&&",
+                    right: first.condition,
+                });
+            } else {
+                self.condition = first.condition;
+            }
+            drop_it(first.body);
+        }
+    }
+    return self;
+
+    function is_break(node) {
+        return node instanceof AST_Break
+            && compressor.loopcontrol_target(node) === compressor.self();
+    }
+
+    function drop_it(rest) {
+        rest = as_statement_array(rest);
+        if (self.body instanceof AST_BlockStatement) {
+            self.body = self.body.clone();
+            self.body.body = rest.concat(self.body.body.slice(1));
+            self.body = self.body.transform(compressor);
+        } else {
+            self.body = make_node(AST_BlockStatement, self.body, {
+                body: rest
+            }).transform(compressor);
+        }
+        self = if_break_in_loop(self, compressor);
+    }
+}
+
+def_optimize(AST_For, function(self, compressor) {
+    if (!compressor.option("loops")) return self;
+    if (compressor.option("side_effects") && self.init) {
+        self.init = self.init.drop_side_effect_free(compressor);
+    }
+    if (self.condition) {
+        var cond = self.condition.evaluate(compressor);
+        if (!(cond instanceof AST_Node)) {
+            if (cond) self.condition = null;
+            else if (!compressor.option("dead_code")) {
+                var orig = self.condition;
+                self.condition = make_node_from_constant(cond, self.condition);
+                self.condition = best_of_expression(self.condition.transform(compressor), orig);
+            }
+        }
+        if (compressor.option("dead_code")) {
+            if (cond instanceof AST_Node) cond = self.condition.tail_node().evaluate(compressor);
+            if (!cond) {
+                var body = [];
+                extract_from_unreachable_code(compressor, self.body, body);
+                if (self.init instanceof AST_Statement) {
+                    body.push(self.init);
+                } else if (self.init) {
+                    body.push(make_node(AST_SimpleStatement, self.init, {
+                        body: self.init
+                    }));
+                }
+                body.push(make_node(AST_SimpleStatement, self.condition, {
+                    body: self.condition
+                }));
+                return make_node(AST_BlockStatement, self, { body: body }).optimize(compressor);
+            }
+        }
+    }
+    return if_break_in_loop(self, compressor);
+});
+
+def_optimize(AST_If, function(self, compressor) {
+    if (is_empty(self.alternative)) self.alternative = null;
+
+    if (!compressor.option("conditionals")) return self;
+    // if condition can be statically determined, drop
+    // one of the blocks.  note, statically determined implies
+    // “has no side effects”; also it doesn't work for cases like
+    // `x && true`, though it probably should.
+    var cond = self.condition.evaluate(compressor);
+    if (!compressor.option("dead_code") && !(cond instanceof AST_Node)) {
+        var orig = self.condition;
+        self.condition = make_node_from_constant(cond, orig);
+        self.condition = best_of_expression(self.condition.transform(compressor), orig);
+    }
+    if (compressor.option("dead_code")) {
+        if (cond instanceof AST_Node) cond = self.condition.tail_node().evaluate(compressor);
+        if (!cond) {
+            var body = [];
+            extract_from_unreachable_code(compressor, self.body, body);
+            body.push(make_node(AST_SimpleStatement, self.condition, {
+                body: self.condition
+            }));
+            if (self.alternative) body.push(self.alternative);
+            return make_node(AST_BlockStatement, self, { body: body }).optimize(compressor);
+        } else if (!(cond instanceof AST_Node)) {
+            var body = [];
+            body.push(make_node(AST_SimpleStatement, self.condition, {
+                body: self.condition
+            }));
+            body.push(self.body);
+            if (self.alternative) {
+                extract_from_unreachable_code(compressor, self.alternative, body);
+            }
+            return make_node(AST_BlockStatement, self, { body: body }).optimize(compressor);
+        }
+    }
+    var negated = self.condition.negate(compressor);
+    var self_condition_length = self.condition.size();
+    var negated_length = negated.size();
+    var negated_is_best = negated_length < self_condition_length;
+    if (self.alternative && negated_is_best) {
+        negated_is_best = false; // because we already do the switch here.
+        // no need to swap values of self_condition_length and negated_length
+        // here because they are only used in an equality comparison later on.
+        self.condition = negated;
+        var tmp = self.body;
+        self.body = self.alternative || make_node(AST_EmptyStatement, self);
+        self.alternative = tmp;
+    }
+    if (is_empty(self.body) && is_empty(self.alternative)) {
+        return make_node(AST_SimpleStatement, self.condition, {
+            body: self.condition.clone()
+        }).optimize(compressor);
+    }
+    if (self.body instanceof AST_SimpleStatement
+        && self.alternative instanceof AST_SimpleStatement) {
+        return make_node(AST_SimpleStatement, self, {
+            body: make_node(AST_Conditional, self, {
+                condition   : self.condition,
+                consequent  : self.body.body,
+                alternative : self.alternative.body
+            })
+        }).optimize(compressor);
+    }
+    if (is_empty(self.alternative) && self.body instanceof AST_SimpleStatement) {
+        if (self_condition_length === negated_length && !negated_is_best
+            && self.condition instanceof AST_Binary && self.condition.operator == "||") {
+            // although the code length of self.condition and negated are the same,
+            // negated does not require additional surrounding parentheses.
+            // see https://github.com/mishoo/UglifyJS2/issues/979
+            negated_is_best = true;
+        }
+        if (negated_is_best) return make_node(AST_SimpleStatement, self, {
+            body: make_node(AST_Binary, self, {
+                operator : "||",
+                left     : negated,
+                right    : self.body.body
+            })
+        }).optimize(compressor);
+        return make_node(AST_SimpleStatement, self, {
+            body: make_node(AST_Binary, self, {
+                operator : "&&",
+                left     : self.condition,
+                right    : self.body.body
+            })
+        }).optimize(compressor);
+    }
+    if (self.body instanceof AST_EmptyStatement
+        && self.alternative instanceof AST_SimpleStatement) {
+        return make_node(AST_SimpleStatement, self, {
+            body: make_node(AST_Binary, self, {
+                operator : "||",
+                left     : self.condition,
+                right    : self.alternative.body
+            })
+        }).optimize(compressor);
+    }
+    if (self.body instanceof AST_Exit
+        && self.alternative instanceof AST_Exit
+        && self.body.TYPE == self.alternative.TYPE) {
+        return make_node(self.body.CTOR, self, {
+            value: make_node(AST_Conditional, self, {
+                condition   : self.condition,
+                consequent  : self.body.value || make_void_0(self.body),
+                alternative : self.alternative.value || make_void_0(self.alternative),
+            }).transform(compressor)
+        }).optimize(compressor);
+    }
+    if (self.body instanceof AST_If
+        && !self.body.alternative
+        && !self.alternative) {
+        self = make_node(AST_If, self, {
+            condition: make_node(AST_Binary, self.condition, {
+                operator: "&&",
+                left: self.condition,
+                right: self.body.condition
+            }),
+            body: self.body.body,
+            alternative: null
+        });
+    }
+    if (aborts(self.body)) {
+        if (self.alternative) {
+            var alt = self.alternative;
+            self.alternative = null;
+            return make_node(AST_BlockStatement, self, {
+                body: [ self, alt ]
+            }).optimize(compressor);
+        }
+    }
+    if (aborts(self.alternative)) {
+        var body = self.body;
+        self.body = self.alternative;
+        self.condition = negated_is_best ? negated : self.condition.negate(compressor);
+        self.alternative = null;
+        return make_node(AST_BlockStatement, self, {
+            body: [ self, body ]
+        }).optimize(compressor);
+    }
+    return self;
+});
+
+def_optimize(AST_Switch, function(self, compressor) {
+    if (!compressor.option("switches")) return self;
+    var branch;
+    var value = self.expression.evaluate(compressor);
+    if (!(value instanceof AST_Node)) {
+        var orig = self.expression;
+        self.expression = make_node_from_constant(value, orig);
+        self.expression = best_of_expression(self.expression.transform(compressor), orig);
+    }
+    if (!compressor.option("dead_code")) return self;
+    if (value instanceof AST_Node) {
+        value = self.expression.tail_node().evaluate(compressor);
+    }
+    var decl = [];
+    var body = [];
+    var default_branch;
+    var exact_match;
+    // - compress self.body into `body`
+    // - find and deduplicate default branch
+    // - find the exact match (`case 1234` inside `switch(1234)`)
+    for (var i = 0, len = self.body.length; i < len && !exact_match; i++) {
+        branch = self.body[i];
+        if (branch instanceof AST_Default) {
+            if (!default_branch) {
+                default_branch = branch;
+            } else {
+                eliminate_branch(branch, body[body.length - 1]);
+            }
+        } else if (!(value instanceof AST_Node)) {
+            var exp = branch.expression.evaluate(compressor);
+            if (!(exp instanceof AST_Node) && exp !== value) {
+                eliminate_branch(branch, body[body.length - 1]);
+                continue;
+            }
+            if (exp instanceof AST_Node && !exp.has_side_effects(compressor)) {
+                exp = branch.expression.tail_node().evaluate(compressor);
+            }
+            if (exp === value) {
+                exact_match = branch;
+                if (default_branch) {
+                    var default_index = body.indexOf(default_branch);
+                    body.splice(default_index, 1);
+                    eliminate_branch(default_branch, body[default_index - 1]);
+                    default_branch = null;
+                }
+            }
+        }
+        body.push(branch);
+    }
+    // i < len if we found an exact_match. eliminate the rest
+    while (i < len) eliminate_branch(self.body[i++], body[body.length - 1]);
+    self.body = body;
+
+    let default_or_exact = default_branch || exact_match;
+    default_branch = null;
+    exact_match = null;
+
+    // group equivalent branches so they will be located next to each other,
+    // that way the next micro-optimization will merge them.
+    // ** bail micro-optimization if not a simple switch case with breaks
+    if (body.every((branch, i) =>
+        (branch === default_or_exact || branch.expression instanceof AST_Constant)
+        && (branch.body.length === 0 || aborts(branch) || body.length - 1 === i))
+    ) {
+        for (let i = 0; i < body.length; i++) {
+            const branch = body[i];
+            for (let j = i + 1; j < body.length; j++) {
+                const next = body[j];
+                if (next.body.length === 0) continue;
+                const last_branch = j === (body.length - 1);
+                const equivalentBranch = branches_equivalent(next, branch, false);
+                if (equivalentBranch || (last_branch && branches_equivalent(next, branch, true))) {
+                    if (!equivalentBranch && last_branch) {
+                        next.body.push(make_node(AST_Break));
+                    }
+
+                    // let's find previous siblings with inert fallthrough...
+                    let x = j - 1;
+                    let fallthroughDepth = 0;
+                    while (x > i) {
+                        if (is_inert_body(body[x--])) {
+                            fallthroughDepth++;
+                        } else {
+                            break;
+                        }
+                    }
+
+                    const plucked = body.splice(j - fallthroughDepth, 1 + fallthroughDepth);
+                    body.splice(i + 1, 0, ...plucked);
+                    i += plucked.length;
+                }
+            }
+        }
+    }
+
+    // merge equivalent branches in a row
+    for (let i = 0; i < body.length; i++) {
+        let branch = body[i];
+        if (branch.body.length === 0) continue;
+        if (!aborts(branch)) continue;
+
+        for (let j = i + 1; j < body.length; i++, j++) {
+            let next = body[j];
+            if (next.body.length === 0) continue;
+            if (
+                branches_equivalent(next, branch, false)
+                || (j === body.length - 1 && branches_equivalent(next, branch, true))
+            ) {
+                branch.body = [];
+                branch = next;
+                continue;
+            }
+            break;
+        }
+    }
+
+    // Prune any empty branches at the end of the switch statement.
+    {
+        let i = body.length - 1;
+        for (; i >= 0; i--) {
+            let bbody = body[i].body;
+            while (is_break(bbody[bbody.length - 1], compressor)) bbody.pop();
+            if (!is_inert_body(body[i])) break;
+        }
+        // i now points to the index of a branch that contains a body. By incrementing, it's
+        // pointing to the first branch that's empty.
+        i++;
+        if (!default_or_exact || body.indexOf(default_or_exact) >= i) {
+            // The default behavior is to do nothing. We can take advantage of that to
+            // remove all case expressions that are side-effect free that also do
+            // nothing, since they'll default to doing nothing. But we can't remove any
+            // case expressions before one that would side-effect, since they may cause
+            // the side-effect to be skipped.
+            for (let j = body.length - 1; j >= i; j--) {
+                let branch = body[j];
+                if (branch === default_or_exact) {
+                    default_or_exact = null;
+                    eliminate_branch(body.pop());
+                } else if (!branch.expression.has_side_effects(compressor)) {
+                    eliminate_branch(body.pop());
+                } else {
+                    break;
+                }
+            }
+        }
+    }
+
+
+    // Prune side-effect free branches that fall into default.
+    DEFAULT: if (default_or_exact) {
+        let default_index = body.indexOf(default_or_exact);
+        let default_body_index = default_index;
+        for (; default_body_index < body.length - 1; default_body_index++) {
+            if (!is_inert_body(body[default_body_index])) break;
+        }
+        if (default_body_index < body.length - 1) {
+            break DEFAULT;
+        }
+
+        let side_effect_index = body.length - 1;
+        for (; side_effect_index >= 0; side_effect_index--) {
+            let branch = body[side_effect_index];
+            if (branch === default_or_exact) continue;
+            if (branch.expression.has_side_effects(compressor)) break;
+        }
+        // If the default behavior comes after any side-effect case expressions,
+        // then we can fold all side-effect free cases into the default branch.
+        // If the side-effect case is after the default, then any side-effect
+        // free cases could prevent the side-effect from occurring.
+        if (default_body_index > side_effect_index) {
+            let prev_body_index = default_index - 1;
+            for (; prev_body_index >= 0; prev_body_index--) {
+                if (!is_inert_body(body[prev_body_index])) break;
+            }
+            let before = Math.max(side_effect_index, prev_body_index) + 1;
+            let after = default_index;
+            if (side_effect_index > default_index) {
+                // If the default falls into the same body as a side-effect
+                // case, then we need preserve that case and only prune the
+                // cases after it.
+                after = side_effect_index;
+                body[side_effect_index].body = body[default_body_index].body;
+            } else {
+                // The default will be the last branch.
+                default_or_exact.body = body[default_body_index].body;
+            }
+
+            // Prune everything after the default (or last side-effect case)
+            // until the next case with a body.
+            body.splice(after + 1, default_body_index - after);
+            // Prune everything before the default that falls into it.
+            body.splice(before, default_index - before);
+        }
+    }
+
+    // See if we can remove the switch entirely if all cases (the default) fall into the same case body.
+    DEFAULT: if (default_or_exact) {
+        let i = body.findIndex(branch => !is_inert_body(branch));
+        let caseBody;
+        // `i` is equal to one of the following:
+        // - `-1`, there is no body in the switch statement.
+        // - `body.length - 1`, all cases fall into the same body.
+        // - anything else, there are multiple bodies in the switch.
+        if (i === body.length - 1) {
+            // All cases fall into the case body.
+            let branch = body[i];
+            if (has_nested_break(self)) break DEFAULT;
+
+            // This is the last case body, and we've already pruned any breaks, so it's
+            // safe to hoist.
+            caseBody = make_node(AST_BlockStatement, branch, {
+                body: branch.body
+            });
+            branch.body = [];
+        } else if (i !== -1) {
+            // If there are multiple bodies, then we cannot optimize anything.
+            break DEFAULT;
+        }
+
+        let sideEffect = body.find(
+            branch => branch !== default_or_exact && branch.expression.has_side_effects(compressor)
+        );
+        // If no cases cause a side-effect, we can eliminate the switch entirely.
+        if (!sideEffect) {
+            return make_node(AST_BlockStatement, self, {
+                body: decl.concat(
+                    statement(self.expression),
+                    default_or_exact.expression ? statement(default_or_exact.expression) : [],
+                    caseBody || []
+                )
+            }).optimize(compressor);
+        }
+
+        // If we're this far, either there was no body or all cases fell into the same body.
+        // If there was no body, then we don't need a default branch (because the default is
+        // do nothing). If there was a body, we'll extract it to after the switch, so the
+        // switch's new default is to do nothing and we can still prune it.
+        const default_index = body.indexOf(default_or_exact);
+        body.splice(default_index, 1);
+        default_or_exact = null;
+
+        if (caseBody) {
+            // Recurse into switch statement one more time so that we can append the case body
+            // outside of the switch. This recursion will only happen once since we've pruned
+            // the default case.
+            return make_node(AST_BlockStatement, self, {
+                body: decl.concat(self, caseBody)
+            }).optimize(compressor);
+        }
+        // If we fall here, there is a default branch somewhere, there are no case bodies,
+        // and there's a side-effect somewhere. Just let the below paths take care of it.
+    }
+
+    // Reintegrate `decl` (var statements)
+    if (body.length > 0) {
+        body[0].body = decl.concat(body[0].body);
+    }
+    if (body.length == 0) {
+        return make_node(AST_BlockStatement, self, {
+            body: decl.concat(statement(self.expression))
+        }).optimize(compressor);
+    }
+
+    if (body.length == 1 && !has_nested_break(self)) {
+        // This is the last case body, and we've already pruned any breaks, so it's
+        // safe to hoist.
+        let branch = body[0];
+        return make_node(AST_If, self, {
+            condition: make_node(AST_Binary, self, {
+                operator: "===",
+                left: self.expression,
+                right: branch.expression,
+            }),
+            body: make_node(AST_BlockStatement, branch, {
+                body: branch.body
+            }),
+            alternative: null
+        }).optimize(compressor);
+    }
+    if (body.length === 2 && default_or_exact && !has_nested_break(self)) {
+        let branch = body[0] === default_or_exact ? body[1] : body[0];
+        let exact_exp = default_or_exact.expression && statement(default_or_exact.expression);
+        if (aborts(body[0])) {
+            // Only the first branch body could have a break (at the last statement)
+            let first = body[0];
+            if (is_break(first.body[first.body.length - 1], compressor)) {
+                first.body.pop();
+            }
+            return make_node(AST_If, self, {
+                condition: make_node(AST_Binary, self, {
+                    operator: "===",
+                    left: self.expression,
+                    right: branch.expression,
+                }),
+                body: make_node(AST_BlockStatement, branch, {
+                    body: branch.body
+                }),
+                alternative: make_node(AST_BlockStatement, default_or_exact, {
+                    body: [].concat(
+                        exact_exp || [],
+                        default_or_exact.body
+                    )
+                })
+            }).optimize(compressor);
+        }
+        let operator = "===";
+        let consequent = make_node(AST_BlockStatement, branch, {
+            body: branch.body,
+        });
+        let always = make_node(AST_BlockStatement, default_or_exact, {
+            body: [].concat(
+                exact_exp || [],
+                default_or_exact.body
+            )
+        });
+        if (body[0] === default_or_exact) {
+            operator = "!==";
+            let tmp = always;
+            always = consequent;
+            consequent = tmp;
+        }
+        return make_node(AST_BlockStatement, self, {
+            body: [
+                make_node(AST_If, self, {
+                    condition: make_node(AST_Binary, self, {
+                        operator: operator,
+                        left: self.expression,
+                        right: branch.expression,
+                    }),
+                    body: consequent,
+                    alternative: null,
+                }),
+                always,
+            ],
+        }).optimize(compressor);
+    }
+    return self;
+
+    function eliminate_branch(branch, prev) {
+        if (prev && !aborts(prev)) {
+            prev.body = prev.body.concat(branch.body);
+        } else {
+            extract_from_unreachable_code(compressor, branch, decl);
+        }
+    }
+    function branches_equivalent(branch, prev, insertBreak) {
+        let bbody = branch.body;
+        let pbody = prev.body;
+        if (insertBreak) {
+            bbody = bbody.concat(make_node(AST_Break));
+        }
+        if (bbody.length !== pbody.length) return false;
+        let bblock = make_node(AST_BlockStatement, branch, { body: bbody });
+        let pblock = make_node(AST_BlockStatement, prev, { body: pbody });
+        return bblock.equivalent_to(pblock);
+    }
+    function statement(body) {
+        return make_node(AST_SimpleStatement, body, { body });
+    }
+    function has_nested_break(root) {
+        let has_break = false;
+
+        let tw = new TreeWalker(node => {
+            if (has_break) return true;
+            if (node instanceof AST_Lambda) return true;
+            if (node instanceof AST_SimpleStatement) return true;
+            if (!is_break(node, tw)) return;
+            let parent = tw.parent();
+            if (
+                parent instanceof AST_SwitchBranch
+                && parent.body[parent.body.length - 1] === node
+            ) {
+                return;
+            }
+            has_break = true;
+        });
+        root.walk(tw);
+        return has_break;
+    }
+    function is_break(node, stack) {
+        return node instanceof AST_Break
+            && stack.loopcontrol_target(node) === self;
+    }
+    function is_inert_body(branch) {
+        return !aborts(branch) && !make_node(AST_BlockStatement, branch, {
+            body: branch.body
+        }).has_side_effects(compressor);
+    }
+});
+
+def_optimize(AST_Try, function(self, compressor) {
+    if (self.bcatch && self.bfinally && self.bfinally.body.every(is_empty)) self.bfinally = null;
+
+    if (compressor.option("dead_code") && self.body.body.every(is_empty)) {
+        var body = [];
+        if (self.bcatch) {
+            extract_from_unreachable_code(compressor, self.bcatch, body);
+        }
+        if (self.bfinally) body.push(...self.bfinally.body);
+        return make_node(AST_BlockStatement, self, {
+            body: body
+        }).optimize(compressor);
+    }
+    return self;
+});
+
+AST_Definitions.DEFMETHOD("to_assignments", function(compressor) {
+    var reduce_vars = compressor.option("reduce_vars");
+    var assignments = [];
+
+    for (const def of this.definitions) {
+        if (def.value) {
+            var name = make_node(AST_SymbolRef, def.name, def.name);
+            assignments.push(make_node(AST_Assign, def, {
+                operator : "=",
+                logical: false,
+                left     : name,
+                right    : def.value
+            }));
+            if (reduce_vars) name.definition().fixed = false;
+        }
+        const thedef = def.name.definition();
+        thedef.eliminated++;
+        thedef.replaced--;
+    }
+
+    if (assignments.length == 0) return null;
+    return make_sequence(this, assignments);
+});
+
+def_optimize(AST_Definitions, function(self) {
+    if (self.definitions.length == 0) {
+        return make_node(AST_EmptyStatement, self);
+    }
+    return self;
+});
+
+def_optimize(AST_VarDef, function(self, compressor) {
+    if (
+        self.name instanceof AST_SymbolLet
+        && self.value != null
+        && is_undefined(self.value, compressor)
+    ) {
+        self.value = null;
+    }
+    return self;
+});
+
+def_optimize(AST_Import, function(self) {
+    return self;
+});
+
+def_optimize(AST_Call, function(self, compressor) {
+    var exp = self.expression;
+    var fn = exp;
+    inline_array_like_spread(self.args);
+    var simple_args = self.args.every((arg) => !(arg instanceof AST_Expansion));
+
+    if (compressor.option("reduce_vars") && fn instanceof AST_SymbolRef) {
+        fn = fn.fixed_value();
+    }
+
+    var is_func = fn instanceof AST_Lambda;
+
+    if (is_func && fn.pinned()) return self;
+
+    if (compressor.option("unused")
+        && simple_args
+        && is_func
+        && !fn.uses_arguments) {
+        var pos = 0, last = 0;
+        for (var i = 0, len = self.args.length; i < len; i++) {
+            if (fn.argnames[i] instanceof AST_Expansion) {
+                if (has_flag(fn.argnames[i].expression, UNUSED)) while (i < len) {
+                    var node = self.args[i++].drop_side_effect_free(compressor);
+                    if (node) {
+                        self.args[pos++] = node;
+                    }
+                } else while (i < len) {
+                    self.args[pos++] = self.args[i++];
+                }
+                last = pos;
+                break;
+            }
+            var trim = i >= fn.argnames.length;
+            if (trim || has_flag(fn.argnames[i], UNUSED)) {
+                var node = self.args[i].drop_side_effect_free(compressor);
+                if (node) {
+                    self.args[pos++] = node;
+                } else if (!trim) {
+                    self.args[pos++] = make_node(AST_Number, self.args[i], {
+                        value: 0
+                    });
+                    continue;
+                }
+            } else {
+                self.args[pos++] = self.args[i];
+            }
+            last = pos;
+        }
+        self.args.length = last;
+    }
+
+    if (
+        exp instanceof AST_Dot
+        && exp.expression instanceof AST_SymbolRef
+        && exp.expression.name === "console"
+        && exp.expression.definition().undeclared
+        && exp.property === "assert"
+    ) {
+        const condition = self.args[0];
+        if (condition) {
+            const value = condition.evaluate(compressor);
+    
+            if (value === 1 || value === true) {
+                return make_void_0(self).optimize(compressor);
+            }
+        }
+    }    
+
+    if (compressor.option("unsafe") && !exp.contains_optional()) {
+        if (exp instanceof AST_Dot && exp.start.value === "Array" && exp.property === "from" && self.args.length === 1) {
+            const [argument] = self.args;
+            if (argument instanceof AST_Array) {
+                return make_node(AST_Array, argument, {
+                    elements: argument.elements
+                }).optimize(compressor);
+            }
+        }
+        if (is_undeclared_ref(exp)) switch (exp.name) {
+          case "Array":
+            if (self.args.length != 1) {
+                return make_node(AST_Array, self, {
+                    elements: self.args
+                }).optimize(compressor);
+            } else if (self.args[0] instanceof AST_Number && self.args[0].value <= 11) {
+                const elements = [];
+                for (let i = 0; i < self.args[0].value; i++) elements.push(new AST_Hole);
+                return new AST_Array({ elements });
+            }
+            break;
+          case "Object":
+            if (self.args.length == 0) {
+                return make_node(AST_Object, self, {
+                    properties: []
+                });
+            }
+            break;
+          case "String":
+            if (self.args.length == 0) return make_node(AST_String, self, {
+                value: ""
+            });
+            if (self.args.length <= 1) return make_node(AST_Binary, self, {
+                left: self.args[0],
+                operator: "+",
+                right: make_node(AST_String, self, { value: "" })
+            }).optimize(compressor);
+            break;
+          case "Number":
+            if (self.args.length == 0) return make_node(AST_Number, self, {
+                value: 0
+            });
+            if (self.args.length == 1 && compressor.option("unsafe_math")) {
+                return make_node(AST_UnaryPrefix, self, {
+                    expression: self.args[0],
+                    operator: "+"
+                }).optimize(compressor);
+            }
+            break;
+          case "Symbol":
+            if (self.args.length == 1 && self.args[0] instanceof AST_String && compressor.option("unsafe_symbols"))
+                self.args.length = 0;
+                break;
+          case "Boolean":
+            if (self.args.length == 0) return make_node(AST_False, self);
+            if (self.args.length == 1) return make_node(AST_UnaryPrefix, self, {
+                expression: make_node(AST_UnaryPrefix, self, {
+                    expression: self.args[0],
+                    operator: "!"
+                }),
+                operator: "!"
+            }).optimize(compressor);
+            break;
+          case "RegExp":
+            var params = [];
+            if (self.args.length >= 1
+                && self.args.length <= 2
+                && self.args.every((arg) => {
+                    var value = arg.evaluate(compressor);
+                    params.push(value);
+                    return arg !== value;
+                })
+                && regexp_is_safe(params[0])
+            ) {
+                let [ source, flags ] = params;
+                source = regexp_source_fix(new RegExp(source).source);
+                const rx = make_node(AST_RegExp, self, {
+                    value: { source, flags }
+                });
+                if (rx._eval(compressor) !== rx) {
+                    return rx;
+                }
+            }
+            break;
+        } else if (exp instanceof AST_Dot) switch(exp.property) {
+          case "toString":
+            if (self.args.length == 0 && !exp.expression.may_throw_on_access(compressor)) {
+                return make_node(AST_Binary, self, {
+                    left: make_node(AST_String, self, { value: "" }),
+                    operator: "+",
+                    right: exp.expression
+                }).optimize(compressor);
+            }
+            break;
+          case "join":
+            if (exp.expression instanceof AST_Array) EXIT: {
+                var separator;
+                if (self.args.length > 0) {
+                    separator = self.args[0].evaluate(compressor);
+                    if (separator === self.args[0]) break EXIT; // not a constant
+                }
+                var elements = [];
+                var consts = [];
+                for (var i = 0, len = exp.expression.elements.length; i < len; i++) {
+                    var el = exp.expression.elements[i];
+                    if (el instanceof AST_Expansion) break EXIT;
+                    var value = el.evaluate(compressor);
+                    if (value !== el) {
+                        consts.push(value);
+                    } else {
+                        if (consts.length > 0) {
+                            elements.push(make_node(AST_String, self, {
+                                value: consts.join(separator)
+                            }));
+                            consts.length = 0;
+                        }
+                        elements.push(el);
+                    }
+                }
+                if (consts.length > 0) {
+                    elements.push(make_node(AST_String, self, {
+                        value: consts.join(separator)
+                    }));
+                }
+                if (elements.length == 0) return make_node(AST_String, self, { value: "" });
+                if (elements.length == 1) {
+                    if (elements[0].is_string(compressor)) {
+                        return elements[0];
+                    }
+                    return make_node(AST_Binary, elements[0], {
+                        operator : "+",
+                        left     : make_node(AST_String, self, { value: "" }),
+                        right    : elements[0]
+                    });
+                }
+                if (separator == "") {
+                    var first;
+                    if (elements[0].is_string(compressor)
+                        || elements[1].is_string(compressor)) {
+                        first = elements.shift();
+                    } else {
+                        first = make_node(AST_String, self, { value: "" });
+                    }
+                    return elements.reduce(function(prev, el) {
+                        return make_node(AST_Binary, el, {
+                            operator : "+",
+                            left     : prev,
+                            right    : el
+                        });
+                    }, first).optimize(compressor);
+                }
+                // need this awkward cloning to not affect original element
+                // best_of will decide which one to get through.
+                var node = self.clone();
+                node.expression = node.expression.clone();
+                node.expression.expression = node.expression.expression.clone();
+                node.expression.expression.elements = elements;
+                return best_of(compressor, self, node);
+            }
+            break;
+          case "charAt":
+            if (exp.expression.is_string(compressor)) {
+                var arg = self.args[0];
+                var index = arg ? arg.evaluate(compressor) : 0;
+                if (index !== arg) {
+                    return make_node(AST_Sub, exp, {
+                        expression: exp.expression,
+                        property: make_node_from_constant(index | 0, arg || exp)
+                    }).optimize(compressor);
+                }
+            }
+            break;
+          case "apply":
+            if (self.args.length == 2 && self.args[1] instanceof AST_Array) {
+                var args = self.args[1].elements.slice();
+                args.unshift(self.args[0]);
+                return make_node(AST_Call, self, {
+                    expression: make_node(AST_Dot, exp, {
+                        expression: exp.expression,
+                        optional: false,
+                        property: "call"
+                    }),
+                    args: args
+                }).optimize(compressor);
+            }
+            break;
+          case "call":
+            var func = exp.expression;
+            if (func instanceof AST_SymbolRef) {
+                func = func.fixed_value();
+            }
+            if (func instanceof AST_Lambda && !func.contains_this()) {
+                return (self.args.length ? make_sequence(this, [
+                    self.args[0],
+                    make_node(AST_Call, self, {
+                        expression: exp.expression,
+                        args: self.args.slice(1)
+                    })
+                ]) : make_node(AST_Call, self, {
+                    expression: exp.expression,
+                    args: []
+                })).optimize(compressor);
+            }
+            break;
+        }
+    }
+
+    if (compressor.option("unsafe_Function")
+        && is_undeclared_ref(exp)
+        && exp.name == "Function") {
+        // new Function() => function(){}
+        if (self.args.length == 0) return make_empty_function(self).optimize(compressor);
+        if (self.args.every((x) => x instanceof AST_String)) {
+            // quite a corner-case, but we can handle it:
+            //   https://github.com/mishoo/UglifyJS2/issues/203
+            // if the code argument is a constant, then we can minify it.
+            try {
+                var code = "n(function(" + self.args.slice(0, -1).map(function(arg) {
+                    return arg.value;
+                }).join(",") + "){" + self.args[self.args.length - 1].value + "})";
+                var ast = parse(code);
+                var mangle = compressor.mangle_options();
+                ast.figure_out_scope(mangle);
+                var comp = new Compressor(compressor.options, {
+                    mangle_options: compressor._mangle_options
+                });
+                ast = ast.transform(comp);
+                ast.figure_out_scope(mangle);
+                ast.compute_char_frequency(mangle);
+                ast.mangle_names(mangle);
+                var fun;
+                walk(ast, node => {
+                    if (is_func_expr(node)) {
+                        fun = node;
+                        return walk_abort;
+                    }
+                });
+                var code = OutputStream();
+                AST_BlockStatement.prototype._codegen.call(fun, fun, code);
+                self.args = [
+                    make_node(AST_String, self, {
+                        value: fun.argnames.map(function(arg) {
+                            return arg.print_to_string();
+                        }).join(",")
+                    }),
+                    make_node(AST_String, self.args[self.args.length - 1], {
+                        value: code.get().replace(/^{|}$/g, "")
+                    })
+                ];
+                return self;
+            } catch (ex) {
+                if (!(ex instanceof JS_Parse_Error)) {
+                    throw ex;
+                }
+
+                // Otherwise, it crashes at runtime. Or maybe it's nonstandard syntax.
+            }
+        }
+    }
+
+    return inline_into_call(self, compressor);
+});
+
+/** Does this node contain optional property access or optional call? */
+AST_Node.DEFMETHOD("contains_optional", function() {
+    if (
+        this instanceof AST_PropAccess
+        || this instanceof AST_Call
+        || this instanceof AST_Chain
+    ) {
+        if (this.optional) {
+            return true;
+        } else {
+            return this.expression.contains_optional();
+        }
+    } else {
+        return false;
+    }
+});
+
+def_optimize(AST_New, function(self, compressor) {
+    if (
+        compressor.option("unsafe") &&
+        is_undeclared_ref(self.expression) &&
+        ["Object", "RegExp", "Function", "Error", "Array"].includes(self.expression.name)
+    ) return make_node(AST_Call, self, self).transform(compressor);
+    return self;
+});
+
+def_optimize(AST_Sequence, function(self, compressor) {
+    if (!compressor.option("side_effects")) return self;
+    var expressions = [];
+    filter_for_side_effects();
+    var end = expressions.length - 1;
+    trim_right_for_undefined();
+    if (end == 0) {
+        self = maintain_this_binding(compressor.parent(), compressor.self(), expressions[0]);
+        if (!(self instanceof AST_Sequence)) self = self.optimize(compressor);
+        return self;
+    }
+    self.expressions = expressions;
+    return self;
+
+    function filter_for_side_effects() {
+        var first = first_in_statement(compressor);
+        var last = self.expressions.length - 1;
+        self.expressions.forEach(function(expr, index) {
+            if (index < last) expr = expr.drop_side_effect_free(compressor, first);
+            if (expr) {
+                merge_sequence(expressions, expr);
+                first = false;
+            }
+        });
+    }
+
+    function trim_right_for_undefined() {
+        while (end > 0 && is_undefined(expressions[end], compressor)) end--;
+        if (end < expressions.length - 1) {
+            expressions[end] = make_node(AST_UnaryPrefix, self, {
+                operator   : "void",
+                expression : expressions[end]
+            });
+            expressions.length = end + 1;
+        }
+    }
+});
+
+AST_Unary.DEFMETHOD("lift_sequences", function(compressor) {
+    if (compressor.option("sequences")) {
+        if (this.expression instanceof AST_Sequence) {
+            var x = this.expression.expressions.slice();
+            var e = this.clone();
+            e.expression = x.pop();
+            x.push(e);
+            return make_sequence(this, x).optimize(compressor);
+        }
+    }
+    return this;
+});
+
+def_optimize(AST_UnaryPostfix, function(self, compressor) {
+    return self.lift_sequences(compressor);
+});
+
+def_optimize(AST_UnaryPrefix, function(self, compressor) {
+    var e = self.expression;
+    if (
+        self.operator == "delete" &&
+        !(
+            e instanceof AST_SymbolRef ||
+            e instanceof AST_PropAccess ||
+            e instanceof AST_Chain ||
+            is_identifier_atom(e)
+        )
+    ) {
+        return make_sequence(self, [e, make_node(AST_True, self)]).optimize(compressor);
+    }
+    // Short-circuit common `void 0`
+    if (self.operator === "void" && e instanceof AST_Number && e.value === 0) {
+        return unsafe_undefined_ref(self, compressor) || self;
+    }
+    var seq = self.lift_sequences(compressor);
+    if (seq !== self) {
+        return seq;
+    }
+    if (compressor.option("side_effects") && self.operator == "void") {
+        e = e.drop_side_effect_free(compressor);
+        if (e) {
+            self.expression = e;
+            return self;
+        } else {
+            return make_void_0(self).optimize(compressor);
+        }
+    }
+    if (compressor.in_boolean_context()) {
+        switch (self.operator) {
+          case "!":
+            if (e instanceof AST_UnaryPrefix && e.operator == "!") {
+                // !!foo ==> foo, if we're in boolean context
+                return e.expression;
+            }
+            if (e instanceof AST_Binary) {
+                self = best_of(compressor, self, e.negate(compressor, first_in_statement(compressor)));
+            }
+            break;
+          case "typeof":
+            // typeof always returns a non-empty string, thus it's
+            // always true in booleans
+            // And we don't need to check if it's undeclared, because in typeof, that's OK
+            return (e instanceof AST_SymbolRef ? make_node(AST_True, self) : make_sequence(self, [
+                e,
+                make_node(AST_True, self)
+            ])).optimize(compressor);
+        }
+    }
+    if (self.operator == "-" && e instanceof AST_Infinity) {
+        e = e.transform(compressor);
+    }
+    if (e instanceof AST_Binary
+        && (self.operator == "+" || self.operator == "-")
+        && (e.operator == "*" || e.operator == "/" || e.operator == "%")) {
+        return make_node(AST_Binary, self, {
+            operator: e.operator,
+            left: make_node(AST_UnaryPrefix, e.left, {
+                operator: self.operator,
+                expression: e.left
+            }),
+            right: e.right
+        });
+    }
+
+    if (compressor.option("evaluate")) {
+        // ~~x => x (in 32-bit context)
+        // ~~{32 bit integer} => {32 bit integer}
+        if (
+            self.operator === "~"
+            && self.expression instanceof AST_UnaryPrefix
+            && self.expression.operator === "~"
+            && (compressor.in_32_bit_context(false) || self.expression.expression.is_32_bit_integer(compressor))
+        ) {
+            return self.expression.expression;
+        }
+
+        // ~(x ^ y) => x ^ ~y
+        if (
+            self.operator === "~"
+            && e instanceof AST_Binary
+            && e.operator === "^"
+        ) {
+            if (e.left instanceof AST_UnaryPrefix && e.left.operator === "~") {
+                // ~(~x ^ y) => x ^ y
+                e.left = e.left.bitwise_negate(compressor, true);
+            } else {
+                e.right = e.right.bitwise_negate(compressor, true);
+            }
+            return e;
+        }
+    }
+
+    if (
+        self.operator != "-"
+        // avoid infinite recursion of numerals
+        || !(e instanceof AST_Number || e instanceof AST_Infinity || e instanceof AST_BigInt)
+    ) {
+        var ev = self.evaluate(compressor);
+        if (ev !== self) {
+            ev = make_node_from_constant(ev, self).optimize(compressor);
+            return best_of(compressor, ev, self);
+        }
+    }
+    return self;
+});
+
+AST_Binary.DEFMETHOD("lift_sequences", function(compressor) {
+    if (compressor.option("sequences")) {
+        if (this.left instanceof AST_Sequence) {
+            var x = this.left.expressions.slice();
+            var e = this.clone();
+            e.left = x.pop();
+            x.push(e);
+            return make_sequence(this, x).optimize(compressor);
+        }
+        if (this.right instanceof AST_Sequence && !this.left.has_side_effects(compressor)) {
+            var assign = this.operator == "=" && this.left instanceof AST_SymbolRef;
+            var x = this.right.expressions;
+            var last = x.length - 1;
+            for (var i = 0; i < last; i++) {
+                if (!assign && x[i].has_side_effects(compressor)) break;
+            }
+            if (i == last) {
+                x = x.slice();
+                var e = this.clone();
+                e.right = x.pop();
+                x.push(e);
+                return make_sequence(this, x).optimize(compressor);
+            } else if (i > 0) {
+                var e = this.clone();
+                e.right = make_sequence(this.right, x.slice(i));
+                x = x.slice(0, i);
+                x.push(e);
+                return make_sequence(this, x).optimize(compressor);
+            }
+        }
+    }
+    return this;
+});
+
+var commutativeOperators = makePredicate("== === != !== * & | ^");
+function is_object(node) {
+    return node instanceof AST_Array
+        || node instanceof AST_Lambda
+        || node instanceof AST_Object
+        || node instanceof AST_Class;
+}
+
+def_optimize(AST_Binary, function(self, compressor) {
+    function reversible() {
+        return self.left.is_constant()
+            || self.right.is_constant()
+            || !self.left.has_side_effects(compressor)
+                && !self.right.has_side_effects(compressor);
+    }
+    function reverse(op) {
+        if (reversible()) {
+            if (op) self.operator = op;
+            var tmp = self.left;
+            self.left = self.right;
+            self.right = tmp;
+        }
+    }
+    if (compressor.option("lhs_constants") && commutativeOperators.has(self.operator)) {
+        if (self.right.is_constant()
+            && !self.left.is_constant()) {
+            // if right is a constant, whatever side effects the
+            // left side might have could not influence the
+            // result.  hence, force switch.
+
+            if (!(self.left instanceof AST_Binary
+                  && PRECEDENCE[self.left.operator] >= PRECEDENCE[self.operator])) {
+                reverse();
+            }
+        }
+    }
+    self = self.lift_sequences(compressor);
+    if (compressor.option("comparisons")) switch (self.operator) {
+      case "===":
+      case "!==":
+        var is_strict_comparison = true;
+        if (
+            (self.left.is_string(compressor) && self.right.is_string(compressor)) ||
+            (self.left.is_number(compressor) && self.right.is_number(compressor)) ||
+            (self.left.is_bigint(compressor) && self.right.is_bigint(compressor)) ||
+            (self.left.is_boolean() && self.right.is_boolean()) ||
+            self.left.equivalent_to(self.right)
+        ) {
+            self.operator = self.operator.substr(0, 2);
+        }
+
+        // XXX: intentionally falling down to the next case
+      case "==":
+      case "!=":
+        // void 0 == x => null == x
+        if (!is_strict_comparison && is_undefined(self.left, compressor)) {
+            self.left = make_node(AST_Null, self.left);
+        // x == void 0 => x == null
+        } else if (!is_strict_comparison && is_undefined(self.right, compressor)) {
+            self.right = make_node(AST_Null, self.right);
+        } else if (compressor.option("typeofs")
+            // "undefined" == typeof x => undefined === x
+            && self.left instanceof AST_String
+            && self.left.value == "undefined"
+            && self.right instanceof AST_UnaryPrefix
+            && self.right.operator == "typeof") {
+            var expr = self.right.expression;
+            if (expr instanceof AST_SymbolRef ? expr.is_declared(compressor)
+                : !(expr instanceof AST_PropAccess && compressor.option("ie8"))) {
+                self.right = expr;
+                self.left = make_void_0(self.left).optimize(compressor);
+                if (self.operator.length == 2) self.operator += "=";
+            }
+        } else if (compressor.option("typeofs")
+            // typeof x === "undefined" => x === undefined
+            && self.left instanceof AST_UnaryPrefix
+            && self.left.operator == "typeof"
+            && self.right instanceof AST_String
+            && self.right.value == "undefined") {
+            var expr = self.left.expression;
+            if (expr instanceof AST_SymbolRef ? expr.is_declared(compressor)
+                : !(expr instanceof AST_PropAccess && compressor.option("ie8"))) {
+                self.left = expr;
+                self.right = make_void_0(self.right).optimize(compressor);
+                if (self.operator.length == 2) self.operator += "=";
+            }
+        } else if (self.left instanceof AST_SymbolRef
+            // obj !== obj => false
+            && self.right instanceof AST_SymbolRef
+            && self.left.definition() === self.right.definition()
+            && is_object(self.left.fixed_value())) {
+            return make_node(self.operator[0] == "=" ? AST_True : AST_False, self);
+        } else if (self.left.is_32_bit_integer(compressor) && self.right.is_32_bit_integer(compressor)) {
+            const not = node => make_node(AST_UnaryPrefix, node, {
+                operator: "!",
+                expression: node
+            });
+            const booleanify = (node, truthy) => {
+                if (truthy) {
+                    return compressor.in_boolean_context()
+                        ? node
+                        : not(not(node));
+                } else {
+                    return not(node);
+                }
+            };
+
+            // The only falsy 32-bit integer is 0
+            if (self.left instanceof AST_Number && self.left.value === 0) {
+                return booleanify(self.right, self.operator[0] === "!");
+            }
+            if (self.right instanceof AST_Number && self.right.value === 0) {
+                return booleanify(self.left, self.operator[0] === "!");
+            }
+
+            // Mask all-bits check
+            // (x & 0xFF) != 0xFF => !(~x & 0xFF)
+            let and_op, x, mask;
+            if (
+                (and_op =
+                    self.left instanceof AST_Binary ? self.left
+                    : self.right instanceof AST_Binary ? self.right : null)
+                && (mask = and_op === self.left ? self.right : self.left)
+                && and_op.operator === "&"
+                && mask instanceof AST_Number
+                && mask.is_32_bit_integer(compressor)
+                && (x =
+                    and_op.left.equivalent_to(mask) ? and_op.right
+                    : and_op.right.equivalent_to(mask) ? and_op.left : null)
+            ) {
+                let optimized = booleanify(make_node(AST_Binary, self, {
+                    operator: "&",
+                    left: mask,
+                    right: make_node(AST_UnaryPrefix, self, {
+                        operator: "~",
+                        expression: x
+                    })
+                }), self.operator[0] === "!");
+
+                return best_of(compressor, optimized, self);
+            }
+        }
+        break;
+      case "&&":
+      case "||":
+        var lhs = self.left;
+        if (lhs.operator == self.operator) {
+            lhs = lhs.right;
+        }
+        if (lhs instanceof AST_Binary
+            && lhs.operator == (self.operator == "&&" ? "!==" : "===")
+            && self.right instanceof AST_Binary
+            && lhs.operator == self.right.operator
+            && (is_undefined(lhs.left, compressor) && self.right.left instanceof AST_Null
+                || lhs.left instanceof AST_Null && is_undefined(self.right.left, compressor))
+            && !lhs.right.has_side_effects(compressor)
+            && lhs.right.equivalent_to(self.right.right)) {
+            var combined = make_node(AST_Binary, self, {
+                operator: lhs.operator.slice(0, -1),
+                left: make_node(AST_Null, self),
+                right: lhs.right
+            });
+            if (lhs !== self.left) {
+                combined = make_node(AST_Binary, self, {
+                    operator: self.operator,
+                    left: self.left.left,
+                    right: combined
+                });
+            }
+            return combined;
+        }
+        break;
+    }
+    if (self.operator == "+" && compressor.in_boolean_context()) {
+        var ll = self.left.evaluate(compressor);
+        var rr = self.right.evaluate(compressor);
+        if (ll && typeof ll == "string") {
+            return make_sequence(self, [
+                self.right,
+                make_node(AST_True, self)
+            ]).optimize(compressor);
+        }
+        if (rr && typeof rr == "string") {
+            return make_sequence(self, [
+                self.left,
+                make_node(AST_True, self)
+            ]).optimize(compressor);
+        }
+    }
+    if (compressor.option("comparisons") && self.is_boolean()) {
+        if (!(compressor.parent() instanceof AST_Binary)
+            || compressor.parent() instanceof AST_Assign) {
+            var negated = make_node(AST_UnaryPrefix, self, {
+                operator: "!",
+                expression: self.negate(compressor, first_in_statement(compressor))
+            });
+            self = best_of(compressor, self, negated);
+        }
+        if (compressor.option("unsafe_comps")) {
+            switch (self.operator) {
+              case "<": reverse(">"); break;
+              case "<=": reverse(">="); break;
+            }
+        }
+    }
+    if (self.operator == "+") {
+        if (self.right instanceof AST_String
+            && self.right.getValue() == ""
+            && self.left.is_string(compressor)) {
+            return self.left;
+        }
+        if (self.left instanceof AST_String
+            && self.left.getValue() == ""
+            && self.right.is_string(compressor)) {
+            return self.right;
+        }
+        if (self.left instanceof AST_Binary
+            && self.left.operator == "+"
+            && self.left.left instanceof AST_String
+            && self.left.left.getValue() == ""
+            && self.right.is_string(compressor)) {
+            self.left = self.left.right;
+            return self;
+        }
+    }
+    if (compressor.option("evaluate")) {
+        switch (self.operator) {
+          case "&&":
+            var ll = has_flag(self.left, TRUTHY)
+                ? true
+                : has_flag(self.left, FALSY)
+                    ? false
+                    : self.left.evaluate(compressor);
+            if (!ll) {
+                return maintain_this_binding(compressor.parent(), compressor.self(), self.left).optimize(compressor);
+            } else if (!(ll instanceof AST_Node)) {
+                return make_sequence(self, [ self.left, self.right ]).optimize(compressor);
+            }
+            var rr = self.right.evaluate(compressor);
+            if (!rr) {
+                if (compressor.in_boolean_context()) {
+                    return make_sequence(self, [
+                        self.left,
+                        make_node(AST_False, self)
+                    ]).optimize(compressor);
+                } else {
+                    set_flag(self, FALSY);
+                }
+            } else if (!(rr instanceof AST_Node)) {
+                var parent = compressor.parent();
+                if (parent.operator == "&&" && parent.left === compressor.self() || compressor.in_boolean_context()) {
+                    return self.left.optimize(compressor);
+                }
+            }
+            // x || false && y ---> x ? y : false
+            if (self.left.operator == "||") {
+                var lr = self.left.right.evaluate(compressor);
+                if (!lr) return make_node(AST_Conditional, self, {
+                    condition: self.left.left,
+                    consequent: self.right,
+                    alternative: self.left.right
+                }).optimize(compressor);
+            }
+            break;
+          case "||":
+            var ll = has_flag(self.left, TRUTHY)
+              ? true
+              : has_flag(self.left, FALSY)
+                ? false
+                : self.left.evaluate(compressor);
+            if (!ll) {
+                return make_sequence(self, [ self.left, self.right ]).optimize(compressor);
+            } else if (!(ll instanceof AST_Node)) {
+                return maintain_this_binding(compressor.parent(), compressor.self(), self.left).optimize(compressor);
+            }
+            var rr = self.right.evaluate(compressor);
+            if (!rr) {
+                var parent = compressor.parent();
+                if (parent.operator == "||" && parent.left === compressor.self() || compressor.in_boolean_context()) {
+                    return self.left.optimize(compressor);
+                }
+            } else if (!(rr instanceof AST_Node)) {
+                if (compressor.in_boolean_context()) {
+                    return make_sequence(self, [
+                        self.left,
+                        make_node(AST_True, self)
+                    ]).optimize(compressor);
+                } else {
+                    set_flag(self, TRUTHY);
+                }
+            }
+            if (self.left.operator == "&&") {
+                var lr = self.left.right.evaluate(compressor);
+                if (lr && !(lr instanceof AST_Node)) return make_node(AST_Conditional, self, {
+                    condition: self.left.left,
+                    consequent: self.left.right,
+                    alternative: self.right
+                }).optimize(compressor);
+            }
+            break;
+          case "??":
+            if (is_nullish(self.left, compressor)) {
+                return self.right;
+            }
+
+            var ll = self.left.evaluate(compressor);
+            if (!(ll instanceof AST_Node)) {
+                // if we know the value for sure we can simply compute right away.
+                return ll == null ? self.right : self.left;
+            }
+
+            if (compressor.in_boolean_context()) {
+                const rr = self.right.evaluate(compressor);
+                if (!(rr instanceof AST_Node) && !rr) {
+                    return self.left;
+                }
+            }
+        }
+        var associative = true;
+        switch (self.operator) {
+          case "+":
+            // (x + "foo") + "bar" => x + "foobar"
+            if (self.right instanceof AST_Constant
+                && self.left instanceof AST_Binary
+                && self.left.operator == "+"
+                && self.left.is_string(compressor)) {
+                var binary = make_node(AST_Binary, self, {
+                    operator: "+",
+                    left: self.left.right,
+                    right: self.right,
+                });
+                var r = binary.optimize(compressor);
+                if (binary !== r) {
+                    self = make_node(AST_Binary, self, {
+                        operator: "+",
+                        left: self.left.left,
+                        right: r
+                    });
+                }
+            }
+            // (x + "foo") + ("bar" + y) => (x + "foobar") + y
+            if (self.left instanceof AST_Binary
+                && self.left.operator == "+"
+                && self.left.is_string(compressor)
+                && self.right instanceof AST_Binary
+                && self.right.operator == "+"
+                && self.right.is_string(compressor)) {
+                var binary = make_node(AST_Binary, self, {
+                    operator: "+",
+                    left: self.left.right,
+                    right: self.right.left,
+                });
+                var m = binary.optimize(compressor);
+                if (binary !== m) {
+                    self = make_node(AST_Binary, self, {
+                        operator: "+",
+                        left: make_node(AST_Binary, self.left, {
+                            operator: "+",
+                            left: self.left.left,
+                            right: m
+                        }),
+                        right: self.right.right
+                    });
+                }
+            }
+            // a + -b => a - b
+            if (self.right instanceof AST_UnaryPrefix
+                && self.right.operator == "-"
+                && self.left.is_number_or_bigint(compressor)) {
+                self = make_node(AST_Binary, self, {
+                    operator: "-",
+                    left: self.left,
+                    right: self.right.expression
+                });
+                break;
+            }
+            // -a + b => b - a
+            if (self.left instanceof AST_UnaryPrefix
+                && self.left.operator == "-"
+                && reversible()
+                && self.right.is_number_or_bigint(compressor)) {
+                self = make_node(AST_Binary, self, {
+                    operator: "-",
+                    left: self.right,
+                    right: self.left.expression
+                });
+                break;
+            }
+            // `foo${bar}baz` + 1 => `foo${bar}baz1`
+            if (self.left instanceof AST_TemplateString) {
+                var l = self.left;
+                var r = self.right.evaluate(compressor);
+                if (r != self.right) {
+                    l.segments[l.segments.length - 1].value += String(r);
+                    return l;
+                }
+            }
+            // 1 + `foo${bar}baz` => `1foo${bar}baz`
+            if (self.right instanceof AST_TemplateString) {
+                var r = self.right;
+                var l = self.left.evaluate(compressor);
+                if (l != self.left) {
+                    r.segments[0].value = String(l) + r.segments[0].value;
+                    return r;
+                }
+            }
+            // `1${bar}2` + `foo${bar}baz` => `1${bar}2foo${bar}baz`
+            if (self.left instanceof AST_TemplateString
+                && self.right instanceof AST_TemplateString) {
+                var l = self.left;
+                var segments = l.segments;
+                var r = self.right;
+                segments[segments.length - 1].value += r.segments[0].value;
+                for (var i = 1; i < r.segments.length; i++) {
+                    segments.push(r.segments[i]);
+                }
+                return l;
+            }
+          case "*":
+            associative = compressor.option("unsafe_math");
+          case "&":
+          case "|":
+          case "^":
+            // a + +b => +b + a
+            if (
+                self.left.is_number_or_bigint(compressor)
+                && self.right.is_number_or_bigint(compressor)
+                && reversible()
+                && !(self.left instanceof AST_Binary
+                    && self.left.operator != self.operator
+                    && PRECEDENCE[self.left.operator] >= PRECEDENCE[self.operator])) {
+                var reversed = make_node(AST_Binary, self, {
+                    operator: self.operator,
+                    left: self.right,
+                    right: self.left
+                });
+                if (self.right instanceof AST_Constant
+                    && !(self.left instanceof AST_Constant)) {
+                    self = best_of(compressor, reversed, self);
+                } else {
+                    self = best_of(compressor, self, reversed);
+                }
+            }
+            if (associative && self.is_number_or_bigint(compressor)) {
+                // a + (b + c) => (a + b) + c
+                if (self.right instanceof AST_Binary
+                    && self.right.operator == self.operator) {
+                    self = make_node(AST_Binary, self, {
+                        operator: self.operator,
+                        left: make_node(AST_Binary, self.left, {
+                            operator: self.operator,
+                            left: self.left,
+                            right: self.right.left,
+                            start: self.left.start,
+                            end: self.right.left.end
+                        }),
+                        right: self.right.right
+                    });
+                }
+                // (n + 2) + 3 => 5 + n
+                // (2 * n) * 3 => 6 + n
+                if (self.right instanceof AST_Constant
+                    && self.left instanceof AST_Binary
+                    && self.left.operator == self.operator) {
+                    if (self.left.left instanceof AST_Constant) {
+                        self = make_node(AST_Binary, self, {
+                            operator: self.operator,
+                            left: make_node(AST_Binary, self.left, {
+                                operator: self.operator,
+                                left: self.left.left,
+                                right: self.right,
+                                start: self.left.left.start,
+                                end: self.right.end
+                            }),
+                            right: self.left.right
+                        });
+                    } else if (self.left.right instanceof AST_Constant) {
+                        self = make_node(AST_Binary, self, {
+                            operator: self.operator,
+                            left: make_node(AST_Binary, self.left, {
+                                operator: self.operator,
+                                left: self.left.right,
+                                right: self.right,
+                                start: self.left.right.start,
+                                end: self.right.end
+                            }),
+                            right: self.left.left
+                        });
+                    }
+                }
+                // (a | 1) | (2 | d) => (3 | a) | b
+                if (self.left instanceof AST_Binary
+                    && self.left.operator == self.operator
+                    && self.left.right instanceof AST_Constant
+                    && self.right instanceof AST_Binary
+                    && self.right.operator == self.operator
+                    && self.right.left instanceof AST_Constant) {
+                    self = make_node(AST_Binary, self, {
+                        operator: self.operator,
+                        left: make_node(AST_Binary, self.left, {
+                            operator: self.operator,
+                            left: make_node(AST_Binary, self.left.left, {
+                                operator: self.operator,
+                                left: self.left.right,
+                                right: self.right.left,
+                                start: self.left.right.start,
+                                end: self.right.left.end
+                            }),
+                            right: self.left.left
+                        }),
+                        right: self.right.right
+                    });
+                }
+            }
+        }
+
+        // bitwise ops
+        if (bitwise_binop.has(self.operator)) {
+            // Use De Morgan's laws
+            // z & (X | y)
+            // => z & X (given y & z === 0)
+            // => z & X | {y & z} (given y & z !== 0)
+            let y, z, x_node, y_node, z_node = self.left;
+            if (
+                self.operator === "&"
+                && self.right instanceof AST_Binary
+                && self.right.operator === "|"
+                && typeof (z = self.left.evaluate(compressor)) === "number"
+            ) {
+                if (typeof (y = self.right.right.evaluate(compressor)) === "number") {
+                    // z & (X | y)
+                    x_node = self.right.left;
+                    y_node = self.right.right;
+                } else if (typeof (y = self.right.left.evaluate(compressor)) === "number") {
+                    // z & (y | X)
+                    x_node = self.right.right;
+                    y_node = self.right.left;
+                }
+
+                if (x_node && y_node) {
+                    if ((y & z) === 0) {
+                        self = make_node(AST_Binary, self, {
+                            operator: self.operator,
+                            left: z_node,
+                            right: x_node
+                        });
+                    } else {
+                        const reordered_ops = make_node(AST_Binary, self, {
+                            operator: "|",
+                            left: make_node(AST_Binary, self, {
+                                operator: "&",
+                                left: x_node,
+                                right: z_node
+                            }),
+                            right: make_node_from_constant(y & z, y_node),
+                        });
+
+                        self = best_of(compressor, self, reordered_ops);
+                    }
+                }
+            }
+
+            // x | x => 0 | x
+            // x & x => 0 | x
+            if (
+                (self.operator === "|" || self.operator === "&")
+                && self.left.equivalent_to(self.right)
+                && !self.left.has_side_effects(compressor)
+                && compressor.in_32_bit_context(true)
+            ) {
+                self.left = make_node(AST_Number, self, { value: 0 });
+                self.operator = "|";
+            }
+
+            // ~x ^ ~y => x ^ y
+            if (
+                self.operator === "^"
+                && self.left instanceof AST_UnaryPrefix
+                && self.left.operator === "~"
+                && self.right instanceof AST_UnaryPrefix
+                && self.right.operator === "~"
+            ) {
+                self = make_node(AST_Binary, self, {
+                    operator: "^",
+                    left: self.left.expression,
+                    right: self.right.expression
+                });
+            }
+
+
+            // Shifts that do nothing
+            // {anything} >> 0 => {anything} | 0
+            // {anything} << 0 => {anything} | 0
+            if (
+                (self.operator === "<<" || self.operator === ">>")
+                && self.right instanceof AST_Number && self.right.value === 0
+            ) {
+                self.operator = "|";
+            }
+
+            // Find useless to-bitwise conversions
+            // {32 bit integer} | 0 => {32 bit integer}
+            // {32 bit integer} ^ 0 => {32 bit integer}
+            const zero_side = self.right instanceof AST_Number && self.right.value === 0 ? self.right
+                : self.left instanceof AST_Number && self.left.value === 0 ? self.left
+                : null;
+            const non_zero_side = zero_side && (zero_side === self.right ? self.left : self.right);
+            if (
+                zero_side
+                && (self.operator === "|" || self.operator === "^")
+                && (non_zero_side.is_32_bit_integer(compressor) || compressor.in_32_bit_context(true))
+            ) {
+                return non_zero_side;
+            }
+
+            // {anything} & 0 => 0
+            if (
+                zero_side
+                && self.operator === "&"
+                && !non_zero_side.has_side_effects(compressor)
+                && non_zero_side.is_32_bit_integer(compressor)
+            ) {
+                return zero_side;
+            }
+
+            // ~0 is all ones, as well as -1.
+            // We can ellide some operations with it.
+            const is_full_mask = (node) =>
+                node instanceof AST_Number && node.value === -1
+                ||
+                    node instanceof AST_UnaryPrefix
+                    && node.operator === "-"
+                    && node.expression instanceof AST_Number
+                    && node.expression.value === 1;
+
+            const full_mask = is_full_mask(self.right) ? self.right
+                : is_full_mask(self.left) ? self.left
+                : null;
+            const other_side = (full_mask === self.right ? self.left : self.right);
+
+            // {32 bit integer} & -1 => {32 bit integer}
+            if (
+                full_mask
+                && self.operator === "&"
+                && (
+                    other_side.is_32_bit_integer(compressor)
+                    || compressor.in_32_bit_context(true)
+                )
+            ) {
+                return other_side;
+            }
+
+            // {anything} ^ -1 => ~{anything}
+            if (
+                full_mask
+                && self.operator === "^"
+                && (
+                    other_side.is_32_bit_integer(compressor)
+                    || compressor.in_32_bit_context(true)
+                )
+            ) {
+                return other_side.bitwise_negate(compressor);
+            }
+        }
+    }
+    // x && (y && z)  ==>  x && y && z
+    // x || (y || z)  ==>  x || y || z
+    // x + ("y" + z)  ==>  x + "y" + z
+    // "x" + (y + "z")==>  "x" + y + "z"
+    if (self.right instanceof AST_Binary
+        && self.right.operator == self.operator
+        && (lazy_op.has(self.operator)
+            || (self.operator == "+"
+                && (self.right.left.is_string(compressor)
+                    || (self.left.is_string(compressor)
+                        && self.right.right.is_string(compressor)))))
+    ) {
+        self.left = make_node(AST_Binary, self.left, {
+            operator : self.operator,
+            left     : self.left.transform(compressor),
+            right    : self.right.left.transform(compressor)
+        });
+        self.right = self.right.right.transform(compressor);
+        return self.transform(compressor);
+    }
+    var ev = self.evaluate(compressor);
+    if (ev !== self) {
+        ev = make_node_from_constant(ev, self).optimize(compressor);
+        return best_of(compressor, ev, self);
+    }
+    return self;
+});
+
+def_optimize(AST_SymbolExport, function(self) {
+    return self;
+});
+
+def_optimize(AST_SymbolRef, function(self, compressor) {
+    if (
+        !compressor.option("ie8")
+        && is_undeclared_ref(self)
+        && !compressor.find_parent(AST_With)
+    ) {
+        switch (self.name) {
+          case "undefined":
+            return make_node(AST_Undefined, self).optimize(compressor);
+          case "NaN":
+            return make_node(AST_NaN, self).optimize(compressor);
+          case "Infinity":
+            return make_node(AST_Infinity, self).optimize(compressor);
+        }
+    }
+
+    if (compressor.option("reduce_vars") && !compressor.is_lhs()) {
+        return inline_into_symbolref(self, compressor);
+    } else {
+        return self;
+    }
+});
+
+function is_atomic(lhs, self) {
+    return lhs instanceof AST_SymbolRef || lhs.TYPE === self.TYPE;
+}
+
+/** Apply the `unsafe_undefined` option: find a variable called `undefined` and turn `self` into a reference to it. */
+function unsafe_undefined_ref(self, compressor) {
+    if (compressor.option("unsafe_undefined")) {
+        var undef = find_variable(compressor, "undefined");
+        if (undef) {
+            var ref = make_node(AST_SymbolRef, self, {
+                name   : "undefined",
+                scope  : undef.scope,
+                thedef : undef
+            });
+            set_flag(ref, UNDEFINED);
+            return ref;
+        }
+    }
+    return null;
+}
+
+def_optimize(AST_Undefined, function(self, compressor) {
+    var symbolref = unsafe_undefined_ref(self, compressor);
+    if (symbolref) return symbolref;
+    var lhs = compressor.is_lhs();
+    if (lhs && is_atomic(lhs, self)) return self;
+    return make_void_0(self);
+});
+
+def_optimize(AST_Infinity, function(self, compressor) {
+    var lhs = compressor.is_lhs();
+    if (lhs && is_atomic(lhs, self)) return self;
+    if (
+        compressor.option("keep_infinity")
+        && !(lhs && !is_atomic(lhs, self))
+        && !find_variable(compressor, "Infinity")
+    ) {
+        return self;
+    }
+    return make_node(AST_Binary, self, {
+        operator: "/",
+        left: make_node(AST_Number, self, {
+            value: 1
+        }),
+        right: make_node(AST_Number, self, {
+            value: 0
+        })
+    });
+});
+
+def_optimize(AST_NaN, function(self, compressor) {
+    var lhs = compressor.is_lhs();
+    if (lhs && !is_atomic(lhs, self)
+        || find_variable(compressor, "NaN")) {
+        return make_node(AST_Binary, self, {
+            operator: "/",
+            left: make_node(AST_Number, self, {
+                value: 0
+            }),
+            right: make_node(AST_Number, self, {
+                value: 0
+            })
+        });
+    }
+    return self;
+});
+
+const ASSIGN_OPS = makePredicate("+ - / * % >> << >>> | ^ &");
+const ASSIGN_OPS_COMMUTATIVE = makePredicate("* | ^ &");
+def_optimize(AST_Assign, function(self, compressor) {
+    if (self.logical) {
+        return self.lift_sequences(compressor);
+    }
+
+    var def;
+    // x = x ---> x
+    if (
+        self.operator === "="
+        && self.left instanceof AST_SymbolRef
+        && self.left.name !== "arguments"
+        && !(def = self.left.definition()).undeclared
+        && self.right.equivalent_to(self.left)
+    ) {
+        return self.right;
+    }
+
+    if (compressor.option("dead_code")
+        && self.left instanceof AST_SymbolRef
+        && (def = self.left.definition()).scope === compressor.find_parent(AST_Lambda)) {
+        var level = 0, node, parent = self;
+        do {
+            node = parent;
+            parent = compressor.parent(level++);
+            if (parent instanceof AST_Exit) {
+                if (in_try(level, parent)) break;
+                if (is_reachable(def.scope, [ def ])) break;
+                if (self.operator == "=") return self.right;
+                def.fixed = false;
+                return make_node(AST_Binary, self, {
+                    operator: self.operator.slice(0, -1),
+                    left: self.left,
+                    right: self.right
+                }).optimize(compressor);
+            }
+        } while (parent instanceof AST_Binary && parent.right === node
+            || parent instanceof AST_Sequence && parent.tail_node() === node);
+    }
+    self = self.lift_sequences(compressor);
+
+    if (self.operator == "=" && self.left instanceof AST_SymbolRef && self.right instanceof AST_Binary) {
+        // x = expr1 OP expr2
+        if (self.right.left instanceof AST_SymbolRef
+            && self.right.left.name == self.left.name
+            && ASSIGN_OPS.has(self.right.operator)) {
+            // x = x - 2  --->  x -= 2
+            self.operator = self.right.operator + "=";
+            self.right = self.right.right;
+        } else if (self.right.right instanceof AST_SymbolRef
+            && self.right.right.name == self.left.name
+            && ASSIGN_OPS_COMMUTATIVE.has(self.right.operator)
+            && !self.right.left.has_side_effects(compressor)) {
+            // x = 2 & x  --->  x &= 2
+            self.operator = self.right.operator + "=";
+            self.right = self.right.left;
+        }
+    }
+    return self;
+
+    function in_try(level, node) {
+        function may_assignment_throw() {
+            const right = self.right;
+            self.right = make_node(AST_Null, right);
+            const may_throw = node.may_throw(compressor);
+            self.right = right;
+
+            return may_throw;
+        }
+
+        var stop_at = self.left.definition().scope.get_defun_scope();
+        var parent;
+        while ((parent = compressor.parent(level++)) !== stop_at) {
+            if (parent instanceof AST_Try) {
+                if (parent.bfinally) return true;
+                if (parent.bcatch && may_assignment_throw()) return true;
+            }
+        }
+    }
+});
+
+def_optimize(AST_DefaultAssign, function(self, compressor) {
+    if (!compressor.option("evaluate")) {
+        return self;
+    }
+    var evaluateRight = self.right.evaluate(compressor);
+
+    // `[x = undefined] = foo` ---> `[x] = foo`
+    // `(arg = undefined) => ...` ---> `(arg) => ...` (unless `keep_fargs`)
+    // `((arg = undefined) => ...)()` ---> `((arg) => ...)()`
+    let lambda, iife;
+    if (evaluateRight === undefined) {
+        if (
+            (lambda = compressor.parent()) instanceof AST_Lambda
+                ? (
+                    compressor.option("keep_fargs") === false
+                    || (iife = compressor.parent(1)).TYPE === "Call"
+                        && iife.expression === lambda
+                )
+                : true
+        ) {
+            self = self.left;
+        }
+    } else if (evaluateRight !== self.right) {
+        evaluateRight = make_node_from_constant(evaluateRight, self.right);
+        self.right = best_of_expression(evaluateRight, self.right);
+    }
+
+    return self;
+});
+
+function is_nullish_check(check, check_subject, compressor) {
+    if (check_subject.may_throw(compressor)) return false;
+
+    let nullish_side;
+
+    // foo == null
+    if (
+        check instanceof AST_Binary
+        && check.operator === "=="
+        // which side is nullish?
+        && (
+            (nullish_side = is_nullish(check.left, compressor) && check.left)
+            || (nullish_side = is_nullish(check.right, compressor) && check.right)
+        )
+        // is the other side the same as the check_subject
+        && (
+            nullish_side === check.left
+                ? check.right
+                : check.left
+        ).equivalent_to(check_subject)
+    ) {
+        return true;
+    }
+
+    // foo === null || foo === undefined
+    if (check instanceof AST_Binary && check.operator === "||") {
+        let null_cmp;
+        let undefined_cmp;
+
+        const find_comparison = cmp => {
+            if (!(
+                cmp instanceof AST_Binary
+                && (cmp.operator === "===" || cmp.operator === "==")
+            )) {
+                return false;
+            }
+
+            let found = 0;
+            let defined_side;
+
+            if (cmp.left instanceof AST_Null) {
+                found++;
+                null_cmp = cmp;
+                defined_side = cmp.right;
+            }
+            if (cmp.right instanceof AST_Null) {
+                found++;
+                null_cmp = cmp;
+                defined_side = cmp.left;
+            }
+            if (is_undefined(cmp.left, compressor)) {
+                found++;
+                undefined_cmp = cmp;
+                defined_side = cmp.right;
+            }
+            if (is_undefined(cmp.right, compressor)) {
+                found++;
+                undefined_cmp = cmp;
+                defined_side = cmp.left;
+            }
+
+            if (found !== 1) {
+                return false;
+            }
+
+            if (!defined_side.equivalent_to(check_subject)) {
+                return false;
+            }
+
+            return true;
+        };
+
+        if (!find_comparison(check.left)) return false;
+        if (!find_comparison(check.right)) return false;
+
+        if (null_cmp && undefined_cmp && null_cmp !== undefined_cmp) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+def_optimize(AST_Conditional, function(self, compressor) {
+    if (!compressor.option("conditionals")) return self;
+    // This looks like lift_sequences(), should probably be under "sequences"
+    if (self.condition instanceof AST_Sequence) {
+        var expressions = self.condition.expressions.slice();
+        self.condition = expressions.pop();
+        expressions.push(self);
+        return make_sequence(self, expressions);
+    }
+    var cond = self.condition.evaluate(compressor);
+    if (cond !== self.condition) {
+        if (cond) {
+            return maintain_this_binding(compressor.parent(), compressor.self(), self.consequent);
+        } else {
+            return maintain_this_binding(compressor.parent(), compressor.self(), self.alternative);
+        }
+    }
+    var negated = cond.negate(compressor, first_in_statement(compressor));
+    if (best_of(compressor, cond, negated) === negated) {
+        self = make_node(AST_Conditional, self, {
+            condition: negated,
+            consequent: self.alternative,
+            alternative: self.consequent
+        });
+    }
+    var condition = self.condition;
+    var consequent = self.consequent;
+    var alternative = self.alternative;
+    // x?x:y --> x||y
+    if (condition instanceof AST_SymbolRef
+        && consequent instanceof AST_SymbolRef
+        && condition.definition() === consequent.definition()) {
+        return make_node(AST_Binary, self, {
+            operator: "||",
+            left: condition,
+            right: alternative
+        });
+    }
+    // if (foo) exp = something; else exp = something_else;
+    //                   |
+    //                   v
+    // exp = foo ? something : something_else;
+    if (
+        consequent instanceof AST_Assign
+        && alternative instanceof AST_Assign
+        && consequent.operator === alternative.operator
+        && consequent.logical === alternative.logical
+        && consequent.left.equivalent_to(alternative.left)
+        && (!self.condition.has_side_effects(compressor)
+            || consequent.operator == "="
+                && !consequent.left.has_side_effects(compressor))
+    ) {
+        return make_node(AST_Assign, self, {
+            operator: consequent.operator,
+            left: consequent.left,
+            logical: consequent.logical,
+            right: make_node(AST_Conditional, self, {
+                condition: self.condition,
+                consequent: consequent.right,
+                alternative: alternative.right
+            })
+        });
+    }
+    // x ? y(a) : y(b) --> y(x ? a : b)
+    var arg_index;
+    if (consequent instanceof AST_Call
+        && alternative.TYPE === consequent.TYPE
+        && consequent.args.length > 0
+        && consequent.args.length == alternative.args.length
+        && consequent.expression.equivalent_to(alternative.expression)
+        && !self.condition.has_side_effects(compressor)
+        && !consequent.expression.has_side_effects(compressor)
+        && typeof (arg_index = single_arg_diff()) == "number") {
+        var node = consequent.clone();
+        node.args[arg_index] = make_node(AST_Conditional, self, {
+            condition: self.condition,
+            consequent: consequent.args[arg_index],
+            alternative: alternative.args[arg_index]
+        });
+        return node;
+    }
+    // a ? b : c ? b : d --> (a || c) ? b : d
+    if (alternative instanceof AST_Conditional
+        && consequent.equivalent_to(alternative.consequent)) {
+        return make_node(AST_Conditional, self, {
+            condition: make_node(AST_Binary, self, {
+                operator: "||",
+                left: condition,
+                right: alternative.condition
+            }),
+            consequent: consequent,
+            alternative: alternative.alternative
+        }).optimize(compressor);
+    }
+
+    // a == null ? b : a -> a ?? b
+    if (
+        compressor.option("ecma") >= 2020 &&
+        is_nullish_check(condition, alternative, compressor)
+    ) {
+        return make_node(AST_Binary, self, {
+            operator: "??",
+            left: alternative,
+            right: consequent
+        }).optimize(compressor);
+    }
+
+    // a ? b : (c, b) --> (a || c), b
+    if (alternative instanceof AST_Sequence
+        && consequent.equivalent_to(alternative.expressions[alternative.expressions.length - 1])) {
+        return make_sequence(self, [
+            make_node(AST_Binary, self, {
+                operator: "||",
+                left: condition,
+                right: make_sequence(self, alternative.expressions.slice(0, -1))
+            }),
+            consequent
+        ]).optimize(compressor);
+    }
+    // a ? b : (c && b) --> (a || c) && b
+    if (alternative instanceof AST_Binary
+        && alternative.operator == "&&"
+        && consequent.equivalent_to(alternative.right)) {
+        return make_node(AST_Binary, self, {
+            operator: "&&",
+            left: make_node(AST_Binary, self, {
+                operator: "||",
+                left: condition,
+                right: alternative.left
+            }),
+            right: consequent
+        }).optimize(compressor);
+    }
+    // x?y?z:a:a --> x&&y?z:a
+    if (consequent instanceof AST_Conditional
+        && consequent.alternative.equivalent_to(alternative)) {
+        return make_node(AST_Conditional, self, {
+            condition: make_node(AST_Binary, self, {
+                left: self.condition,
+                operator: "&&",
+                right: consequent.condition
+            }),
+            consequent: consequent.consequent,
+            alternative: alternative
+        });
+    }
+    // x ? y : y --> x, y
+    if (consequent.equivalent_to(alternative)) {
+        return make_sequence(self, [
+            self.condition,
+            consequent
+        ]).optimize(compressor);
+    }
+    // x ? y || z : z --> x && y || z
+    if (consequent instanceof AST_Binary
+        && consequent.operator == "||"
+        && consequent.right.equivalent_to(alternative)) {
+        return make_node(AST_Binary, self, {
+            operator: "||",
+            left: make_node(AST_Binary, self, {
+                operator: "&&",
+                left: self.condition,
+                right: consequent.left
+            }),
+            right: alternative
+        }).optimize(compressor);
+    }
+
+    const in_bool = compressor.in_boolean_context();
+    if (is_true(self.consequent)) {
+        if (is_false(self.alternative)) {
+            // c ? true : false ---> !!c
+            return booleanize(self.condition);
+        }
+        // c ? true : x ---> !!c || x
+        return make_node(AST_Binary, self, {
+            operator: "||",
+            left: booleanize(self.condition),
+            right: self.alternative
+        });
+    }
+    if (is_false(self.consequent)) {
+        if (is_true(self.alternative)) {
+            // c ? false : true ---> !c
+            return booleanize(self.condition.negate(compressor));
+        }
+        // c ? false : x ---> !c && x
+        return make_node(AST_Binary, self, {
+            operator: "&&",
+            left: booleanize(self.condition.negate(compressor)),
+            right: self.alternative
+        });
+    }
+    if (is_true(self.alternative)) {
+        // c ? x : true ---> !c || x
+        return make_node(AST_Binary, self, {
+            operator: "||",
+            left: booleanize(self.condition.negate(compressor)),
+            right: self.consequent
+        });
+    }
+    if (is_false(self.alternative)) {
+        // c ? x : false ---> !!c && x
+        return make_node(AST_Binary, self, {
+            operator: "&&",
+            left: booleanize(self.condition),
+            right: self.consequent
+        });
+    }
+
+    return self;
+
+    function booleanize(node) {
+        if (node.is_boolean()) return node;
+        // !!expression
+        return make_node(AST_UnaryPrefix, node, {
+            operator: "!",
+            expression: node.negate(compressor)
+        });
+    }
+
+    // AST_True or !0
+    function is_true(node) {
+        return node instanceof AST_True
+            || in_bool
+                && node instanceof AST_Constant
+                && node.getValue()
+            || (node instanceof AST_UnaryPrefix
+                && node.operator == "!"
+                && node.expression instanceof AST_Constant
+                && !node.expression.getValue());
+    }
+    // AST_False or !1
+    function is_false(node) {
+        return node instanceof AST_False
+            || in_bool
+                && node instanceof AST_Constant
+                && !node.getValue()
+            || (node instanceof AST_UnaryPrefix
+                && node.operator == "!"
+                && node.expression instanceof AST_Constant
+                && node.expression.getValue());
+    }
+
+    function single_arg_diff() {
+        var a = consequent.args;
+        var b = alternative.args;
+        for (var i = 0, len = a.length; i < len; i++) {
+            if (a[i] instanceof AST_Expansion) return;
+            if (!a[i].equivalent_to(b[i])) {
+                if (b[i] instanceof AST_Expansion) return;
+                for (var j = i + 1; j < len; j++) {
+                    if (a[j] instanceof AST_Expansion) return;
+                    if (!a[j].equivalent_to(b[j])) return;
+                }
+                return i;
+            }
+        }
+    }
+});
+
+def_optimize(AST_Boolean, function(self, compressor) {
+    if (compressor.in_boolean_context()) return make_node(AST_Number, self, {
+        value: +self.value
+    });
+    var p = compressor.parent();
+    if (compressor.option("booleans_as_integers")) {
+        if (p instanceof AST_Binary && (p.operator == "===" || p.operator == "!==")) {
+            p.operator = p.operator.replace(/=$/, "");
+        }
+        return make_node(AST_Number, self, {
+            value: +self.value
+        });
+    }
+    if (compressor.option("booleans")) {
+        if (p instanceof AST_Binary && (p.operator == "=="
+                                        || p.operator == "!=")) {
+            return make_node(AST_Number, self, {
+                value: +self.value
+            });
+        }
+        return make_node(AST_UnaryPrefix, self, {
+            operator: "!",
+            expression: make_node(AST_Number, self, {
+                value: 1 - self.value
+            })
+        });
+    }
+    return self;
+});
+
+function safe_to_flatten(value, compressor) {
+    if (value instanceof AST_SymbolRef) {
+        value = value.fixed_value();
+    }
+    if (!value) return false;
+    if (!(value instanceof AST_Lambda || value instanceof AST_Class)) return true;
+    if (!(value instanceof AST_Lambda && value.contains_this())) return true;
+    return compressor.parent() instanceof AST_New;
+}
+
+AST_PropAccess.DEFMETHOD("flatten_object", function(key, compressor) {
+    if (!compressor.option("properties")) return;
+    if (key === "__proto__") return;
+    if (this instanceof AST_DotHash) return;
+
+    var arrows = compressor.option("unsafe_arrows") && compressor.option("ecma") >= 2015;
+    var expr = this.expression;
+    if (expr instanceof AST_Object) {
+        var props = expr.properties;
+
+        for (var i = props.length; --i >= 0;) {
+            var prop = props[i];
+
+            if ("" + (prop instanceof AST_ConciseMethod ? prop.key.name : prop.key) == key) {
+                const all_props_flattenable = props.every((p) =>
+                    (p instanceof AST_ObjectKeyVal
+                        || arrows && p instanceof AST_ConciseMethod && !p.value.is_generator
+                    )
+                    && !p.computed_key()
+                );
+
+                if (!all_props_flattenable) return;
+                if (!safe_to_flatten(prop.value, compressor)) return;
+
+                return make_node(AST_Sub, this, {
+                    expression: make_node(AST_Array, expr, {
+                        elements: props.map(function(prop) {
+                            var v = prop.value;
+                            if (v instanceof AST_Accessor) {
+                                v = make_node(AST_Function, v, v);
+                            }
+
+                            var k = prop.key;
+                            if (k instanceof AST_Node && !(k instanceof AST_SymbolMethod)) {
+                                return make_sequence(prop, [ k, v ]);
+                            }
+
+                            return v;
+                        })
+                    }),
+                    property: make_node(AST_Number, this, {
+                        value: i
+                    })
+                });
+            }
+        }
+    }
+});
+
+def_optimize(AST_Sub, function(self, compressor) {
+    var expr = self.expression;
+    var prop = self.property;
+    if (compressor.option("properties")) {
+        var key = prop.evaluate(compressor);
+        if (key !== prop) {
+            if (typeof key == "string") {
+                if (key == "undefined") {
+                    key = undefined;
+                } else {
+                    var value = parseFloat(key);
+                    if (value.toString() == key) {
+                        key = value;
+                    }
+                }
+            }
+            prop = self.property = best_of_expression(
+                prop,
+                make_node_from_constant(key, prop).transform(compressor)
+            );
+            var property = "" + key;
+            if (is_basic_identifier_string(property)
+                && property.length <= prop.size() + 1) {
+                return make_node(AST_Dot, self, {
+                    expression: expr,
+                    optional: self.optional,
+                    property: property,
+                    quote: prop.quote,
+                }).optimize(compressor);
+            }
+        }
+    }
+    var fn;
+    OPT_ARGUMENTS: if (compressor.option("arguments")
+        && expr instanceof AST_SymbolRef
+        && expr.name == "arguments"
+        && expr.definition().orig.length == 1
+        && (fn = expr.scope) instanceof AST_Lambda
+        && fn.uses_arguments
+        && !(fn instanceof AST_Arrow)
+        && prop instanceof AST_Number) {
+        var index = prop.getValue();
+        var params = new Set();
+        var argnames = fn.argnames;
+        for (var n = 0; n < argnames.length; n++) {
+            if (!(argnames[n] instanceof AST_SymbolFunarg)) {
+                break OPT_ARGUMENTS; // destructuring parameter - bail
+            }
+            var param = argnames[n].name;
+            if (params.has(param)) {
+                break OPT_ARGUMENTS; // duplicate parameter - bail
+            }
+            params.add(param);
+        }
+        var argname = fn.argnames[index];
+        if (argname && compressor.has_directive("use strict")) {
+            var def = argname.definition();
+            if (!compressor.option("reduce_vars") || def.assignments || def.orig.length > 1) {
+                argname = null;
+            }
+        } else if (!argname && !compressor.option("keep_fargs") && index < fn.argnames.length + 5) {
+            while (index >= fn.argnames.length) {
+                argname = fn.create_symbol(AST_SymbolFunarg, {
+                    source: fn,
+                    scope: fn,
+                    tentative_name: "argument_" + fn.argnames.length,
+                });
+                fn.argnames.push(argname);
+            }
+        }
+        if (argname) {
+            var sym = make_node(AST_SymbolRef, self, argname);
+            sym.reference({});
+            clear_flag(argname, UNUSED);
+            return sym;
+        }
+    }
+    if (compressor.is_lhs()) return self;
+    if (key !== prop) {
+        var sub = self.flatten_object(property, compressor);
+        if (sub) {
+            expr = self.expression = sub.expression;
+            prop = self.property = sub.property;
+        }
+    }
+    if (compressor.option("properties") && compressor.option("side_effects")
+        && prop instanceof AST_Number && expr instanceof AST_Array) {
+        var index = prop.getValue();
+        var elements = expr.elements;
+        var retValue = elements[index];
+        FLATTEN: if (safe_to_flatten(retValue, compressor)) {
+            var flatten = true;
+            var values = [];
+            for (var i = elements.length; --i > index;) {
+                var value = elements[i].drop_side_effect_free(compressor);
+                if (value) {
+                    values.unshift(value);
+                    if (flatten && value.has_side_effects(compressor)) flatten = false;
+                }
+            }
+            if (retValue instanceof AST_Expansion) break FLATTEN;
+            retValue = retValue instanceof AST_Hole ? make_void_0(retValue) : retValue;
+            if (!flatten) values.unshift(retValue);
+            while (--i >= 0) {
+                var value = elements[i];
+                if (value instanceof AST_Expansion) break FLATTEN;
+                value = value.drop_side_effect_free(compressor);
+                if (value) values.unshift(value);
+                else index--;
+            }
+            if (flatten) {
+                values.push(retValue);
+                return make_sequence(self, values).optimize(compressor);
+            } else return make_node(AST_Sub, self, {
+                expression: make_node(AST_Array, expr, {
+                    elements: values
+                }),
+                property: make_node(AST_Number, prop, {
+                    value: index
+                })
+            });
+        }
+    }
+    var ev = self.evaluate(compressor);
+    if (ev !== self) {
+        ev = make_node_from_constant(ev, self).optimize(compressor);
+        return best_of(compressor, ev, self);
+    }
+    return self;
+});
+
+def_optimize(AST_Chain, function (self, compressor) {
+    if (is_nullish(self.expression, compressor)) {
+        let parent = compressor.parent();
+        // It's valid to delete a nullish optional chain, but if we optimized
+        // this to `delete undefined` then it would appear to be a syntax error
+        // when we try to optimize the delete. Thankfully, `delete 0` is fine.
+        if (parent instanceof AST_UnaryPrefix && parent.operator === "delete") {
+            return make_node_from_constant(0, self);
+        }
+        return make_void_0(self).optimize(compressor);
+    }
+    if (
+        self.expression instanceof AST_PropAccess
+        || self.expression instanceof AST_Call
+    ) {
+        return self;
+    } else {
+        // Keep the AST valid, in case the child swapped itself
+        return self.expression;
+    }
+});
+
+def_optimize(AST_Dot, function(self, compressor) {
+    const parent = compressor.parent();
+    if (compressor.is_lhs()) return self;
+    if (compressor.option("unsafe_proto")
+        && self.expression instanceof AST_Dot
+        && self.expression.property == "prototype") {
+        var exp = self.expression.expression;
+        if (is_undeclared_ref(exp)) switch (exp.name) {
+          case "Array":
+            self.expression = make_node(AST_Array, self.expression, {
+                elements: []
+            });
+            break;
+          case "Function":
+            self.expression = make_empty_function(self.expression);
+            break;
+          case "Number":
+            self.expression = make_node(AST_Number, self.expression, {
+                value: 0
+            });
+            break;
+          case "Object":
+            self.expression = make_node(AST_Object, self.expression, {
+                properties: []
+            });
+            break;
+          case "RegExp":
+            self.expression = make_node(AST_RegExp, self.expression, {
+                value: { source: "t", flags: "" }
+            });
+            break;
+          case "String":
+            self.expression = make_node(AST_String, self.expression, {
+                value: ""
+            });
+            break;
+        }
+    }
+    if (!(parent instanceof AST_Call) || !has_annotation(parent, _NOINLINE)) {
+        const sub = self.flatten_object(self.property, compressor);
+        if (sub) return sub.optimize(compressor);
+    }
+
+    if (self.expression instanceof AST_PropAccess
+        && parent instanceof AST_PropAccess) {
+        return self;
+    }
+
+    let ev = self.evaluate(compressor);
+    if (ev !== self) {
+        ev = make_node_from_constant(ev, self).optimize(compressor);
+        return best_of(compressor, ev, self);
+    }
+    return self;
+});
+
+function literals_in_boolean_context(self, compressor) {
+    if (compressor.in_boolean_context()) {
+        return best_of(compressor, self, make_sequence(self, [
+            self,
+            make_node(AST_True, self)
+        ]).optimize(compressor));
+    }
+    return self;
+}
+
+function inline_array_like_spread(elements) {
+    for (var i = 0; i < elements.length; i++) {
+        var el = elements[i];
+        if (el instanceof AST_Expansion) {
+            var expr = el.expression;
+            if (
+                expr instanceof AST_Array
+                && !expr.elements.some(elm => elm instanceof AST_Hole)
+            ) {
+                elements.splice(i, 1, ...expr.elements);
+                // Step back one, as the element at i is now new.
+                i--;
+            }
+            // In array-like spread, spreading a non-iterable value is TypeError.
+            // We therefore can’t optimize anything else, unlike with object spread.
+        }
+    }
+}
+
+def_optimize(AST_Array, function(self, compressor) {
+    var optimized = literals_in_boolean_context(self, compressor);
+    if (optimized !== self) {
+        return optimized;
+    }
+    inline_array_like_spread(self.elements);
+    return self;
+});
+
+function inline_object_prop_spread(props) {
+    for (var i = 0; i < props.length; i++) {
+        var prop = props[i];
+        if (prop instanceof AST_Expansion) {
+            const expr = prop.expression;
+            if (
+                expr instanceof AST_Object
+                && expr.properties.every(prop => prop instanceof AST_ObjectKeyVal)
+            ) {
+                props.splice(i, 1, ...expr.properties);
+                // Step back one, as the property at i is now new.
+                i--;
+            } else if ((
+                    // `expr.is_constant()` returns `false` for `AST_RegExp`, so need both.
+                    expr instanceof AST_Constant
+                    || expr.is_constant()
+                ) && !(expr instanceof AST_String)) {
+                // Unlike array-like spread, in object spread, spreading a
+                // non-iterable value silently does nothing; it is thus safe
+                // to remove. AST_String is the only iterable constant.
+                props.splice(i, 1);
+                i--;
+            }
+        }
+    }
+}
+
+def_optimize(AST_Object, function(self, compressor) {
+    var optimized = literals_in_boolean_context(self, compressor);
+    if (optimized !== self) {
+        return optimized;
+    }
+    inline_object_prop_spread(self.properties);
+    return self;
+});
+
+def_optimize(AST_RegExp, literals_in_boolean_context);
+
+def_optimize(AST_Return, function(self, compressor) {
+    if (self.value && is_undefined(self.value, compressor)) {
+        self.value = null;
+    }
+    return self;
+});
+
+def_optimize(AST_Arrow, opt_AST_Lambda);
+
+def_optimize(AST_Function, function(self, compressor) {
+    self = opt_AST_Lambda(self, compressor);
+    if (compressor.option("unsafe_arrows")
+        && compressor.option("ecma") >= 2015
+        && !self.name
+        && !self.is_generator
+        && !self.uses_arguments
+        && !self.pinned()) {
+        const uses_this = walk(self, node => {
+            if (node instanceof AST_This) return walk_abort;
+        });
+        if (!uses_this) return make_node(AST_Arrow, self, self).optimize(compressor);
+    }
+    return self;
+});
+
+def_optimize(AST_Class, function(self) {
+    for (let i = 0; i < self.properties.length; i++) {
+        const prop = self.properties[i];
+        if (prop instanceof AST_ClassStaticBlock && prop.body.length == 0) {
+            self.properties.splice(i, 1);
+            i--;
+        }
+    }
+
+    return self;
+});
+
+def_optimize(AST_ClassStaticBlock, function(self, compressor) {
+    tighten_body(self.body, compressor);
+    return self;
+});
+
+def_optimize(AST_Yield, function(self, compressor) {
+    if (self.expression && !self.is_star && is_undefined(self.expression, compressor)) {
+        self.expression = null;
+    }
+    return self;
+});
+
+def_optimize(AST_TemplateString, function(self, compressor) {
+    if (
+        !compressor.option("evaluate")
+        || compressor.parent() instanceof AST_PrefixedTemplateString
+    ) {
+        return self;
+    }
+
+    var segments = [];
+    for (var i = 0; i < self.segments.length; i++) {
+        var segment = self.segments[i];
+        if (segment instanceof AST_Node) {
+            var result = segment.evaluate(compressor);
+            // Evaluate to constant value
+            // Constant value shorter than ${segment}
+            if (result !== segment && (result + "").length <= segment.size() + "${}".length) {
+                // There should always be a previous and next segment if segment is a node
+                segments[segments.length - 1].value = segments[segments.length - 1].value + result + self.segments[++i].value;
+                continue;
+            }
+            // `before ${`innerBefore ${any} innerAfter`} after` => `before innerBefore ${any} innerAfter after`
+            // TODO:
+            // `before ${'test' + foo} after` => `before innerBefore ${any} innerAfter after`
+            // `before ${foo + 'test} after` => `before innerBefore ${any} innerAfter after`
+            if (segment instanceof AST_TemplateString) {
+                var inners = segment.segments;
+                segments[segments.length - 1].value += inners[0].value;
+                for (var j = 1; j < inners.length; j++) {
+                    segment = inners[j];
+                    segments.push(segment);
+                }
+                continue;
+            }
+        }
+        segments.push(segment);
+    }
+    self.segments = segments;
+
+    // `foo` => "foo"
+    if (segments.length == 1) {
+        return make_node(AST_String, self, segments[0]);
+    }
+
+    if (
+        segments.length === 3
+        && segments[1] instanceof AST_Node
+        && (
+            segments[1].is_string(compressor)
+            || segments[1].is_number_or_bigint(compressor)
+            || is_nullish(segments[1], compressor)
+            || compressor.option("unsafe")
+        )
+    ) {
+        // `foo${bar}` => "foo" + bar
+        if (segments[2].value === "") {
+            return make_node(AST_Binary, self, {
+                operator: "+",
+                left: make_node(AST_String, self, {
+                    value: segments[0].value,
+                }),
+                right: segments[1],
+            });
+        }
+        // `${bar}baz` => bar + "baz"
+        if (segments[0].value === "") {
+            return make_node(AST_Binary, self, {
+                operator: "+",
+                left: segments[1],
+                right: make_node(AST_String, self, {
+                    value: segments[2].value,
+                }),
+            });
+        }
+    }
+    return self;
+});
+
+def_optimize(AST_PrefixedTemplateString, function(self) {
+    return self;
+});
+
+// ["p"]:1 ---> p:1
+// [42]:1 ---> 42:1
+function lift_key(self, compressor) {
+    if (!compressor.option("computed_props")) return self;
+    // save a comparison in the typical case
+    if (!(self.key instanceof AST_Constant)) return self;
+    // allow certain acceptable props as not all AST_Constants are true constants
+    if (self.key instanceof AST_String || self.key instanceof AST_Number) {
+        const key = self.key.value.toString();
+
+        if (key === "__proto__") return self;
+        if (key == "constructor"
+            && compressor.parent() instanceof AST_Class) return self;
+        if (self instanceof AST_ObjectKeyVal) {
+            self.quote = self.key.quote;
+            self.key = key;
+        } else if (self instanceof AST_ClassProperty) {
+            self.quote = self.key.quote;
+            self.key = make_node(AST_SymbolClassProperty, self.key, {
+                name: key,
+            });
+        } else {
+            self.quote = self.key.quote;
+            self.key = make_node(AST_SymbolMethod, self.key, {
+                name: key,
+            });
+        }
+    }
+    return self;
+}
+
+def_optimize(AST_ObjectProperty, lift_key);
+
+def_optimize(AST_ConciseMethod, function(self, compressor) {
+    lift_key(self, compressor);
+    // p(){return x;} ---> p:()=>x
+    if (compressor.option("arrows")
+        && compressor.parent() instanceof AST_Object
+        && !self.value.is_generator
+        && !self.value.uses_arguments
+        && !self.value.pinned()
+        && self.value.body.length == 1
+        && self.value.body[0] instanceof AST_Return
+        && self.value.body[0].value
+        && !self.value.contains_this()) {
+        var arrow = make_node(AST_Arrow, self.value, self.value);
+        arrow.async = self.value.async;
+        arrow.is_generator = self.value.is_generator;
+        return make_node(AST_ObjectKeyVal, self, {
+            key: self.key instanceof AST_SymbolMethod ? self.key.name : self.key,
+            value: arrow,
+            quote: self.quote,
+        });
+    }
+    return self;
+});
+
+def_optimize(AST_ObjectKeyVal, function(self, compressor) {
+    lift_key(self, compressor);
+    // p:function(){} ---> p(){}
+    // p:function*(){} ---> *p(){}
+    // p:async function(){} ---> async p(){}
+    // p:()=>{} ---> p(){}
+    // p:async()=>{} ---> async p(){}
+    var unsafe_methods = compressor.option("unsafe_methods");
+    if (unsafe_methods
+        && compressor.option("ecma") >= 2015
+        && (!(unsafe_methods instanceof RegExp) || unsafe_methods.test(self.key + ""))) {
+        var key = self.key;
+        var value = self.value;
+        var is_arrow_with_block = value instanceof AST_Arrow
+            && Array.isArray(value.body)
+            && !value.contains_this();
+        if ((is_arrow_with_block || value instanceof AST_Function) && !value.name) {
+            return make_node(AST_ConciseMethod, self, {
+                key: key instanceof AST_Node ? key : make_node(AST_SymbolMethod, self, {
+                    name: key,
+                }),
+                value: make_node(AST_Accessor, value, value),
+                quote: self.quote,
+            });
+        }
+    }
+    return self;
+});
+
+def_optimize(AST_Destructuring, function(self, compressor) {
+    if (compressor.option("pure_getters") == true
+        && compressor.option("unused")
+        && !self.is_array
+        && Array.isArray(self.names)
+        && !is_destructuring_export_decl(compressor)
+        && !(self.names[self.names.length - 1] instanceof AST_Expansion)) {
+        var keep = [];
+        for (var i = 0; i < self.names.length; i++) {
+            var elem = self.names[i];
+            if (!(elem instanceof AST_ObjectKeyVal
+                && typeof elem.key == "string"
+                && elem.value instanceof AST_SymbolDeclaration
+                && !should_retain(compressor, elem.value.definition()))) {
+                keep.push(elem);
+            }
+        }
+        if (keep.length != self.names.length) {
+            self.names = keep;
+        }
+    }
+    return self;
+
+    function is_destructuring_export_decl(compressor) {
+        var ancestors = [/^VarDef$/, /^(Const|Let|Var)$/, /^Export$/];
+        for (var a = 0, p = 0, len = ancestors.length; a < len; p++) {
+            var parent = compressor.parent(p);
+            if (!parent) return false;
+            if (a === 0 && parent.TYPE == "Destructuring") continue;
+            if (!ancestors[a].test(parent.TYPE)) {
+                return false;
+            }
+            a++;
+        }
+        return true;
+    }
+
+    function should_retain(compressor, def) {
+        if (def.references.length) return true;
+        if (!def.global) return false;
+        if (compressor.toplevel.vars) {
+            if (compressor.top_retain) {
+                return compressor.top_retain(def);
+            }
+            return false;
+        }
+        return true;
+    }
+});
+
+export {
+    Compressor,
+};
Index: frontend/node_modules/terser/lib/compress/inference.js
===================================================================
--- frontend/node_modules/terser/lib/compress/inference.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/compress/inference.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,1132 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+import {
+  AST_Array,
+  AST_Arrow,
+  AST_Assign,
+  AST_BigInt,
+  AST_Binary,
+  AST_Block,
+  AST_BlockStatement,
+  AST_Call,
+  AST_Case,
+  AST_Chain,
+  AST_Class,
+  AST_DefClass,
+  AST_ClassStaticBlock,
+  AST_ClassPrivateProperty,
+  AST_ClassProperty,
+  AST_ConciseMethod,
+  AST_Conditional,
+  AST_Constant,
+  AST_Definitions,
+  AST_Dot,
+  AST_EmptyStatement,
+  AST_Expansion,
+  AST_False,
+  AST_ForIn,
+  AST_Function,
+  AST_If,
+  AST_Import,
+  AST_DynamicImport,
+  AST_ImportMeta,
+  AST_Jump,
+  AST_LabeledStatement,
+  AST_Lambda,
+  AST_New,
+  AST_Node,
+  AST_Null,
+  AST_Number,
+  AST_Object,
+  AST_ObjectGetter,
+  AST_ObjectKeyVal,
+  AST_ObjectProperty,
+  AST_ObjectSetter,
+  AST_PrivateGetter,
+  AST_PrivateMethod,
+  AST_PrivateSetter,
+  AST_PropAccess,
+  AST_RegExp,
+  AST_Return,
+  AST_Scope,
+  AST_Sequence,
+  AST_SimpleStatement,
+  AST_Statement,
+  AST_String,
+  AST_Sub,
+  AST_Switch,
+  AST_SwitchBranch,
+  AST_SymbolClassProperty,
+  AST_SymbolDeclaration,
+  AST_SymbolRef,
+  AST_TemplateSegment,
+  AST_TemplateString,
+  AST_This,
+  AST_True,
+  AST_Try,
+  AST_Unary,
+  AST_UnaryPostfix,
+  AST_UnaryPrefix,
+  AST_Undefined,
+  AST_VarDef,
+
+  walk,
+  walk_abort,
+
+  _PURE
+} from "../ast.js";
+import {
+    makePredicate,
+    return_true,
+    return_false,
+    return_null,
+    return_this,
+    make_node,
+    member,
+    has_annotation,
+} from "../utils/index.js";
+import { make_sequence, best_of_expression, read_property, requires_sequence_to_maintain_binding } from "./common.js";
+
+import { INLINED, UNDEFINED, has_flag } from "./compressor-flags.js";
+import { is_pure_builtin_call, pure_prop_access_globals } from "./native-objects.js";
+
+// Functions and methods to infer certain facts about expressions
+// It's not always possible to be 100% sure about something just by static analysis,
+// so `true` means yes, and `false` means maybe
+
+export const is_undeclared_ref = (node) =>
+    node instanceof AST_SymbolRef && node.definition().undeclared;
+
+export const bitwise_binop = makePredicate("<<< >> << & | ^ ~");
+export const lazy_op = makePredicate("&& || ??");
+export const unary_side_effects = makePredicate("delete ++ --");
+
+// methods to determine whether an expression has a boolean result type
+(function(def_is_boolean) {
+    const unary_bool = makePredicate("! delete");
+    const binary_bool = makePredicate("in instanceof == != === !== < <= >= >");
+    def_is_boolean(AST_Node, return_false);
+    def_is_boolean(AST_UnaryPrefix, function() {
+        return unary_bool.has(this.operator);
+    });
+    def_is_boolean(AST_Binary, function() {
+        return binary_bool.has(this.operator)
+            || lazy_op.has(this.operator)
+                && this.left.is_boolean()
+                && this.right.is_boolean();
+    });
+    def_is_boolean(AST_Conditional, function() {
+        return this.consequent.is_boolean() && this.alternative.is_boolean();
+    });
+    def_is_boolean(AST_Assign, function() {
+        return this.operator == "=" && this.right.is_boolean();
+    });
+    def_is_boolean(AST_Sequence, function() {
+        return this.tail_node().is_boolean();
+    });
+    def_is_boolean(AST_True, return_true);
+    def_is_boolean(AST_False, return_true);
+})(function(node, func) {
+    node.DEFMETHOD("is_boolean", func);
+});
+
+// methods to determine if an expression has a numeric result type
+(function(def_is_number) {
+    def_is_number(AST_Node, return_false);
+    def_is_number(AST_Number, return_true);
+    const unary = makePredicate("+ - ~ ++ --");
+    def_is_number(AST_Unary, function(compressor) {
+        return unary.has(this.operator) && this.expression.is_number(compressor);
+    });
+    const numeric_ops = makePredicate("- * / % & | ^ << >> >>>");
+    def_is_number(AST_Binary, function(compressor) {
+        if (this.operator === "+") {
+            // Both sides need to be `number`. Or one is a `number` and the other is number-ish.
+            return this.left.is_number(compressor) && this.right.is_number_or_bigint(compressor)
+                || this.right.is_number(compressor) && this.left.is_number_or_bigint(compressor);
+        } else if (numeric_ops.has(this.operator)) {
+            return this.left.is_number(compressor) || this.right.is_number(compressor);
+        } else {
+            return false;
+        }
+    });
+    def_is_number(AST_Assign, function(compressor) {
+        return (this.operator === "=" || numeric_ops.has(this.operator.slice(0, -1)))
+            && this.right.is_number(compressor);
+    });
+    def_is_number(AST_Sequence, function(compressor) {
+        return this.tail_node().is_number(compressor);
+    });
+    def_is_number(AST_Conditional, function(compressor) {
+        return this.consequent.is_number(compressor) && this.alternative.is_number(compressor);
+    });
+})(function(node, func) {
+    node.DEFMETHOD("is_number", func);
+});
+
+// methods to determine if an expression returns a BigInt
+(function(def_is_bigint) {
+    def_is_bigint(AST_Node, return_false);
+    def_is_bigint(AST_BigInt, return_true);
+    const unary = makePredicate("+ - ~ ++ --");
+    def_is_bigint(AST_Unary, function(compressor) {
+        return unary.has(this.operator) && this.expression.is_bigint(compressor);
+    });
+    const numeric_ops = makePredicate("- * / % & | ^ << >>");
+    def_is_bigint(AST_Binary, function(compressor) {
+        if (this.operator === "+") {
+            return this.left.is_bigint(compressor) && this.right.is_number_or_bigint(compressor)
+                || this.right.is_bigint(compressor) && this.left.is_number_or_bigint(compressor);
+        } else if (numeric_ops.has(this.operator)) {
+            return this.left.is_bigint(compressor) || this.right.is_bigint(compressor);
+        } else {
+            return false;
+        }
+    });
+    def_is_bigint(AST_Assign, function(compressor) {
+        return (numeric_ops.has(this.operator.slice(0, -1)) || this.operator == "=")
+            && this.right.is_bigint(compressor);
+    });
+    def_is_bigint(AST_Sequence, function(compressor) {
+        return this.tail_node().is_bigint(compressor);
+    });
+    def_is_bigint(AST_Conditional, function(compressor) {
+        return this.consequent.is_bigint(compressor) && this.alternative.is_bigint(compressor);
+    });
+})(function(node, func) {
+    node.DEFMETHOD("is_bigint", func);
+});
+
+// methods to determine if an expression is a number or a bigint
+(function(def_is_number_or_bigint) {
+    def_is_number_or_bigint(AST_Node, return_false);
+    def_is_number_or_bigint(AST_Number, return_true);
+    def_is_number_or_bigint(AST_BigInt, return_true);
+    const numeric_unary_ops = makePredicate("+ - ~ ++ --");
+    def_is_number_or_bigint(AST_Unary, function(_compressor) {
+        return numeric_unary_ops.has(this.operator);
+    });
+    const numeric_ops = makePredicate("- * / % & | ^ << >>");
+    def_is_number_or_bigint(AST_Binary, function(compressor) {
+        return this.operator === "+"
+            ? this.left.is_number_or_bigint(compressor) && this.right.is_number_or_bigint(compressor)
+            : numeric_ops.has(this.operator);
+    });
+    def_is_number_or_bigint(AST_Assign, function(compressor) {
+        return numeric_ops.has(this.operator.slice(0, -1))
+            || this.operator == "=" && this.right.is_number_or_bigint(compressor);
+    });
+    def_is_number_or_bigint(AST_Sequence, function(compressor) {
+        return this.tail_node().is_number_or_bigint(compressor);
+    });
+    def_is_number_or_bigint(AST_Conditional, function(compressor) {
+        return this.consequent.is_number_or_bigint(compressor) && this.alternative.is_number_or_bigint(compressor);
+    });
+}(function (node, func) {
+    node.DEFMETHOD("is_number_or_bigint", func);
+}));
+
+
+// methods to determine if an expression is a 32 bit integer (IE results from bitwise ops, or is an integer constant fitting in that size
+(function(def_is_32_bit_integer) {
+    def_is_32_bit_integer(AST_Node, return_false);
+    def_is_32_bit_integer(AST_Number, function(_compressor) {
+        return this.value === (this.value | 0);
+    });
+    def_is_32_bit_integer(AST_UnaryPrefix, function(compressor) {
+        return this.operator == "~" ? this.expression.is_number(compressor)
+            : this.operator === "+" ? this.expression.is_32_bit_integer(compressor)
+            : false;
+    });
+    def_is_32_bit_integer(AST_Binary, function(compressor) {
+        return bitwise_binop.has(this.operator)
+            && (this.left.is_number(compressor) || this.right.is_number(compressor));
+    });
+}(function (node, func) {
+    node.DEFMETHOD("is_32_bit_integer", func);
+}));
+
+// methods to determine if an expression has a string result type
+(function(def_is_string) {
+    def_is_string(AST_Node, return_false);
+    def_is_string(AST_String, return_true);
+    def_is_string(AST_TemplateString, return_true);
+    def_is_string(AST_UnaryPrefix, function() {
+        return this.operator == "typeof";
+    });
+    def_is_string(AST_Binary, function(compressor) {
+        return this.operator == "+" &&
+            (this.left.is_string(compressor) || this.right.is_string(compressor));
+    });
+    def_is_string(AST_Assign, function(compressor) {
+        return (this.operator == "=" || this.operator == "+=") && this.right.is_string(compressor);
+    });
+    def_is_string(AST_Sequence, function(compressor) {
+        return this.tail_node().is_string(compressor);
+    });
+    def_is_string(AST_Conditional, function(compressor) {
+        return this.consequent.is_string(compressor) && this.alternative.is_string(compressor);
+    });
+})(function(node, func) {
+    node.DEFMETHOD("is_string", func);
+});
+
+export function is_undefined(node, compressor) {
+    return (
+        has_flag(node, UNDEFINED)
+        || node instanceof AST_Undefined
+        || node instanceof AST_UnaryPrefix
+            && node.operator == "void"
+            && !node.expression.has_side_effects(compressor)
+    );
+}
+
+// Is the node explicitly null or undefined.
+function is_null_or_undefined(node, compressor) {
+    let fixed;
+    return (
+        node instanceof AST_Null
+        || is_undefined(node, compressor)
+        || (
+            node instanceof AST_SymbolRef
+            && (fixed = node.definition().fixed) instanceof AST_Node
+            && is_nullish(fixed, compressor)
+        )
+    );
+}
+
+// Find out if this expression is optionally chained from a base-point that we
+// can statically analyze as null or undefined.
+export function is_nullish_shortcircuited(node, compressor) {
+    if (node instanceof AST_PropAccess || node instanceof AST_Call) {
+        return (
+            (node.optional && is_null_or_undefined(node.expression, compressor))
+            || is_nullish_shortcircuited(node.expression, compressor)
+        );
+    }
+    if (node instanceof AST_Chain) return is_nullish_shortcircuited(node.expression, compressor);
+    return false;
+}
+
+// Find out if something is == null, or can short circuit into nullish.
+// Used to optimize ?. and ??
+export function is_nullish(node, compressor) {
+    if (is_null_or_undefined(node, compressor)) return true;
+    return is_nullish_shortcircuited(node, compressor);
+}
+
+// Determine if expression might cause side effects
+// If there's a possibility that a node may change something when it's executed, this returns true
+(function(def_has_side_effects) {
+    def_has_side_effects(AST_Node, return_true);
+
+    def_has_side_effects(AST_EmptyStatement, return_false);
+    def_has_side_effects(AST_Constant, return_false);
+    def_has_side_effects(AST_This, return_false);
+
+    function any(list, compressor) {
+        for (var i = list.length; --i >= 0;)
+            if (list[i].has_side_effects(compressor))
+                return true;
+        return false;
+    }
+
+    def_has_side_effects(AST_Block, function(compressor) {
+        return any(this.body, compressor);
+    });
+    def_has_side_effects(AST_Call, function(compressor) {
+        if (
+            !this.is_callee_pure(compressor)
+            && (!this.expression.is_call_pure(compressor)
+                || this.expression.has_side_effects(compressor))
+        ) {
+            return true;
+        }
+        return any(this.args, compressor);
+    });
+    def_has_side_effects(AST_Switch, function(compressor) {
+        return this.expression.has_side_effects(compressor)
+            || any(this.body, compressor);
+    });
+    def_has_side_effects(AST_Case, function(compressor) {
+        return this.expression.has_side_effects(compressor)
+            || any(this.body, compressor);
+    });
+    def_has_side_effects(AST_Try, function(compressor) {
+        return this.body.has_side_effects(compressor)
+            || this.bcatch && this.bcatch.has_side_effects(compressor)
+            || this.bfinally && this.bfinally.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_If, function(compressor) {
+        return this.condition.has_side_effects(compressor)
+            || this.body && this.body.has_side_effects(compressor)
+            || this.alternative && this.alternative.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_ImportMeta, return_false);
+    def_has_side_effects(AST_DynamicImport, function() {
+        // `import.source(x)` only compiles the module, which is side-effect free
+        return this.phase !== "source";
+    });
+    def_has_side_effects(AST_LabeledStatement, function(compressor) {
+        return this.body.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_SimpleStatement, function(compressor) {
+        return this.body.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_Lambda, return_false);
+    def_has_side_effects(AST_Class, function (compressor) {
+        if (this.extends && this.extends.has_side_effects(compressor)) {
+            return true;
+        }
+        return any(this.properties, compressor);
+    });
+    def_has_side_effects(AST_ClassStaticBlock, function(compressor) {
+        return any(this.body, compressor);
+    });
+    def_has_side_effects(AST_Binary, function(compressor) {
+        return this.left.has_side_effects(compressor)
+            || this.right.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_Assign, return_true);
+    def_has_side_effects(AST_Conditional, function(compressor) {
+        return this.condition.has_side_effects(compressor)
+            || this.consequent.has_side_effects(compressor)
+            || this.alternative.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_Unary, function(compressor) {
+        return unary_side_effects.has(this.operator)
+            || this.expression.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_SymbolRef, function(compressor) {
+        return !this.is_declared(compressor) && !pure_prop_access_globals.has(this.name);
+    });
+    def_has_side_effects(AST_SymbolClassProperty, return_false);
+    def_has_side_effects(AST_SymbolDeclaration, return_false);
+    def_has_side_effects(AST_Object, function(compressor) {
+        return any(this.properties, compressor);
+    });
+    def_has_side_effects(AST_ObjectKeyVal, function(compressor) {
+        return (
+            this.computed_key() && this.key.has_side_effects(compressor)
+            || this.value && this.value.has_side_effects(compressor)
+        );
+    });
+    def_has_side_effects([
+        AST_ClassProperty,
+        AST_ClassPrivateProperty,
+    ], function(compressor) {
+        return (
+            this.computed_key() && this.key.has_side_effects(compressor)
+            || this.static && this.value && this.value.has_side_effects(compressor)
+        );
+    });
+    def_has_side_effects([
+        AST_PrivateMethod,
+        AST_PrivateGetter,
+        AST_PrivateSetter,
+        AST_ConciseMethod,
+        AST_ObjectGetter,
+        AST_ObjectSetter,
+    ], function(compressor) {
+        return this.computed_key() && this.key.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_Array, function(compressor) {
+        return any(this.elements, compressor);
+    });
+    def_has_side_effects(AST_Dot, function(compressor) {
+        if (is_nullish(this, compressor)) {
+            return this.expression.has_side_effects(compressor);
+        }
+        if (!this.optional && this.expression.may_throw_on_access(compressor)) {
+            return true;
+        }
+
+        return this.expression.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_Sub, function(compressor) {
+        if (is_nullish(this, compressor)) {
+            return this.expression.has_side_effects(compressor);
+        }
+        if (!this.optional && this.expression.may_throw_on_access(compressor)) {
+            return true;
+        }
+
+        var property = this.property.has_side_effects(compressor);
+        if (property && this.optional) return true; // "?." is a condition
+
+        return property || this.expression.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_Chain, function (compressor) {
+        return this.expression.has_side_effects(compressor);
+    });
+    def_has_side_effects(AST_Sequence, function(compressor) {
+        return any(this.expressions, compressor);
+    });
+    def_has_side_effects(AST_Definitions, function(compressor) {
+        return any(this.definitions, compressor);
+    });
+    def_has_side_effects(AST_VarDef, function() {
+        return this.value != null;
+    });
+    def_has_side_effects(AST_TemplateSegment, return_false);
+    def_has_side_effects(AST_TemplateString, function(compressor) {
+        return any(this.segments, compressor);
+    });
+})(function(node_or_nodes, func) {
+    for (const node of [].concat(node_or_nodes)) {
+        node.DEFMETHOD("has_side_effects", func);
+    }
+});
+
+// determine if expression may throw
+(function(def_may_throw) {
+    def_may_throw(AST_Node, return_true);
+
+    def_may_throw(AST_Constant, return_false);
+    def_may_throw(AST_EmptyStatement, return_false);
+    def_may_throw(AST_Lambda, return_false);
+    def_may_throw(AST_SymbolDeclaration, return_false);
+    def_may_throw(AST_This, return_false);
+    def_may_throw(AST_ImportMeta, return_false);
+
+    function any(list, compressor) {
+        for (var i = list.length; --i >= 0;)
+            if (list[i].may_throw(compressor))
+                return true;
+        return false;
+    }
+
+    def_may_throw(AST_Class, function(compressor) {
+        if (this.extends && this.extends.may_throw(compressor)) return true;
+        return any(this.properties, compressor);
+    });
+    def_may_throw(AST_ClassStaticBlock, function (compressor) {
+        return any(this.body, compressor);
+    });
+
+    def_may_throw(AST_Array, function(compressor) {
+        return any(this.elements, compressor);
+    });
+    def_may_throw(AST_Assign, function(compressor) {
+        if (this.right.may_throw(compressor)) return true;
+        if (!compressor.has_directive("use strict")
+            && this.operator == "="
+            && this.left instanceof AST_SymbolRef) {
+            return false;
+        }
+        return this.left.may_throw(compressor);
+    });
+    def_may_throw(AST_Binary, function(compressor) {
+        return this.left.may_throw(compressor)
+            || this.right.may_throw(compressor);
+    });
+    def_may_throw(AST_Block, function(compressor) {
+        return any(this.body, compressor);
+    });
+    def_may_throw(AST_Call, function(compressor) {
+        if (is_nullish(this, compressor)) return false;
+        if (any(this.args, compressor)) return true;
+        if (this.is_callee_pure(compressor)) return false;
+        if (this.expression.may_throw(compressor)) return true;
+        return !(this.expression instanceof AST_Lambda)
+            || any(this.expression.body, compressor);
+    });
+    def_may_throw(AST_Case, function(compressor) {
+        return this.expression.may_throw(compressor)
+            || any(this.body, compressor);
+    });
+    def_may_throw(AST_Conditional, function(compressor) {
+        return this.condition.may_throw(compressor)
+            || this.consequent.may_throw(compressor)
+            || this.alternative.may_throw(compressor);
+    });
+    def_may_throw(AST_Definitions, function(compressor) {
+        return any(this.definitions, compressor);
+    });
+    def_may_throw(AST_If, function(compressor) {
+        return this.condition.may_throw(compressor)
+            || this.body && this.body.may_throw(compressor)
+            || this.alternative && this.alternative.may_throw(compressor);
+    });
+    def_may_throw(AST_LabeledStatement, function(compressor) {
+        return this.body.may_throw(compressor);
+    });
+    def_may_throw(AST_Object, function(compressor) {
+        return any(this.properties, compressor);
+    });
+    def_may_throw(AST_ObjectKeyVal, function(compressor) {
+        return (
+            this.computed_key() && this.key.may_throw(compressor)
+            || this.value ? this.value.may_throw(compressor) : false
+        );
+    });
+    def_may_throw([
+        AST_ClassProperty,
+        AST_ClassPrivateProperty,
+    ], function(compressor) {
+        return (
+            this.computed_key() && this.key.may_throw(compressor)
+            || this.static && this.value && this.value.may_throw(compressor)
+        );
+    });
+    def_may_throw([
+        AST_ConciseMethod,
+        AST_ObjectGetter,
+        AST_ObjectSetter,
+    ], function(compressor) {
+        return this.computed_key() && this.key.may_throw(compressor);
+    });
+    def_may_throw([
+        AST_PrivateMethod,
+        AST_PrivateGetter,
+        AST_PrivateSetter,
+    ], return_false);
+    def_may_throw(AST_Return, function(compressor) {
+        return this.value && this.value.may_throw(compressor);
+    });
+    def_may_throw(AST_Sequence, function(compressor) {
+        return any(this.expressions, compressor);
+    });
+    def_may_throw(AST_SimpleStatement, function(compressor) {
+        return this.body.may_throw(compressor);
+    });
+    def_may_throw(AST_Dot, function(compressor) {
+        if (is_nullish(this, compressor)) return false;
+        return !this.optional && this.expression.may_throw_on_access(compressor)
+            || this.expression.may_throw(compressor);
+    });
+    def_may_throw(AST_Sub, function(compressor) {
+        if (is_nullish(this, compressor)) return false;
+        return !this.optional && this.expression.may_throw_on_access(compressor)
+            || this.expression.may_throw(compressor)
+            || this.property.may_throw(compressor);
+    });
+    def_may_throw(AST_Chain, function(compressor) {
+        return this.expression.may_throw(compressor);
+    });
+    def_may_throw(AST_Switch, function(compressor) {
+        return this.expression.may_throw(compressor)
+            || any(this.body, compressor);
+    });
+    def_may_throw(AST_SymbolRef, function(compressor) {
+        return !this.is_declared(compressor) && !pure_prop_access_globals.has(this.name);
+    });
+    def_may_throw(AST_SymbolClassProperty, return_false);
+    def_may_throw(AST_Try, function(compressor) {
+        return this.bcatch ? this.bcatch.may_throw(compressor) : this.body.may_throw(compressor)
+            || this.bfinally && this.bfinally.may_throw(compressor);
+    });
+    def_may_throw(AST_Unary, function(compressor) {
+        if (this.operator == "typeof" && this.expression instanceof AST_SymbolRef)
+            return false;
+        return this.expression.may_throw(compressor);
+    });
+    def_may_throw(AST_VarDef, function(compressor) {
+        if (!this.value) return false;
+        return this.value.may_throw(compressor);
+    });
+})(function(node_or_nodes, func) {
+    for (const node of [].concat(node_or_nodes)) {
+        node.DEFMETHOD("may_throw", func);
+    }
+});
+
+// determine if expression is constant
+(function(def_is_constant_expression) {
+    function all_refs_local(scope) {
+        let result = true;
+        walk(this, node => {
+            if (node instanceof AST_SymbolRef) {
+                if (has_flag(this, INLINED)) {
+                    result = false;
+                    return walk_abort;
+                }
+                var def = node.definition();
+                if (
+                    member(def, this.enclosed)
+                    && !this.variables.has(def.name)
+                ) {
+                    if (scope) {
+                        var scope_def = scope.find_variable(node);
+                        if (def.undeclared ? !scope_def : scope_def === def) {
+                            result = "f";
+                            return true;
+                        }
+                    }
+                    result = false;
+                    return walk_abort;
+                }
+                return true;
+            }
+            if (node instanceof AST_This && this instanceof AST_Arrow) {
+                result = false;
+                return walk_abort;
+            }
+        });
+        return result;
+    }
+
+    def_is_constant_expression(AST_Node, return_false);
+    def_is_constant_expression(AST_Constant, return_true);
+    def_is_constant_expression(AST_Class, function(scope) {
+        if (this.extends && !this.extends.is_constant_expression(scope)) {
+            return false;
+        }
+
+        for (const prop of this.properties) {
+            if (prop.computed_key() && !prop.key.is_constant_expression(scope)) {
+                return false;
+            }
+            if (prop.static && prop.value && !prop.value.is_constant_expression(scope)) {
+                return false;
+            }
+            if (prop instanceof AST_ClassStaticBlock) {
+                return false;
+            }
+        }
+
+        return all_refs_local.call(this, scope);
+    });
+    def_is_constant_expression(AST_Lambda, all_refs_local);
+    def_is_constant_expression(AST_Unary, function() {
+        return this.expression.is_constant_expression();
+    });
+    def_is_constant_expression(AST_Binary, function() {
+        return this.left.is_constant_expression()
+            && this.right.is_constant_expression();
+    });
+    def_is_constant_expression(AST_Array, function() {
+        return this.elements.every((l) => l.is_constant_expression());
+    });
+    def_is_constant_expression(AST_Object, function() {
+        return this.properties.every((l) => l.is_constant_expression());
+    });
+    def_is_constant_expression(AST_ObjectProperty, function() {
+        return !!(!(this.key instanceof AST_Node) && this.value && this.value.is_constant_expression());
+    });
+})(function(node, func) {
+    node.DEFMETHOD("is_constant_expression", func);
+});
+
+
+// may_throw_on_access()
+// returns true if this node may be null, undefined or contain `AST_Accessor`
+(function(def_may_throw_on_access) {
+    AST_Node.DEFMETHOD("may_throw_on_access", function(compressor) {
+        return !compressor.option("pure_getters")
+            || this._dot_throw(compressor);
+    });
+
+    function is_strict(compressor) {
+        return /strict/.test(compressor.option("pure_getters"));
+    }
+
+    def_may_throw_on_access(AST_Node, is_strict);
+    def_may_throw_on_access(AST_Null, return_true);
+    def_may_throw_on_access(AST_Undefined, return_true);
+    def_may_throw_on_access(AST_Constant, return_false);
+    def_may_throw_on_access(AST_Array, return_false);
+    def_may_throw_on_access(AST_Object, function(compressor) {
+        if (!is_strict(compressor)) return false;
+        for (var i = this.properties.length; --i >=0;)
+            if (this.properties[i]._dot_throw(compressor)) return true;
+        return false;
+    });
+    // Do not be as strict with classes as we are with objects.
+    // Hopefully the community is not going to abuse static getters and setters.
+    // https://github.com/terser/terser/issues/724#issuecomment-643655656
+    def_may_throw_on_access(AST_Class, return_false);
+    def_may_throw_on_access(AST_ObjectProperty, return_false);
+    def_may_throw_on_access(AST_ObjectGetter, return_true);
+    def_may_throw_on_access(AST_Expansion, function(compressor) {
+        return this.expression._dot_throw(compressor);
+    });
+    def_may_throw_on_access(AST_Function, return_false);
+    def_may_throw_on_access(AST_Arrow, return_false);
+    def_may_throw_on_access(AST_UnaryPostfix, return_false);
+    def_may_throw_on_access(AST_UnaryPrefix, function() {
+        return this.operator == "void";
+    });
+    def_may_throw_on_access(AST_Binary, function(compressor) {
+        return (this.operator == "&&" || this.operator == "||" || this.operator == "??")
+            && (this.left._dot_throw(compressor) || this.right._dot_throw(compressor));
+    });
+    def_may_throw_on_access(AST_Assign, function(compressor) {
+        if (this.logical) return true;
+
+        return this.operator == "="
+            && this.right._dot_throw(compressor);
+    });
+    def_may_throw_on_access(AST_Conditional, function(compressor) {
+        return this.consequent._dot_throw(compressor)
+            || this.alternative._dot_throw(compressor);
+    });
+    def_may_throw_on_access(AST_Dot, function(compressor) {
+        if (!is_strict(compressor)) return false;
+
+        if (this.property == "prototype") {
+            return !(
+                this.expression instanceof AST_Function
+                || this.expression instanceof AST_Class
+            );
+        }
+        return true;
+    });
+    def_may_throw_on_access(AST_Chain, function(compressor) {
+        return this.expression._dot_throw(compressor);
+    });
+    def_may_throw_on_access(AST_Sequence, function(compressor) {
+        return this.tail_node()._dot_throw(compressor);
+    });
+    def_may_throw_on_access(AST_SymbolRef, function(compressor) {
+        if (this.name === "arguments" && this.scope instanceof AST_Lambda) return false;
+        if (has_flag(this, UNDEFINED)) return true;
+        if (!is_strict(compressor)) return false;
+        if (is_undeclared_ref(this) && this.is_declared(compressor)) return false;
+        if (this.is_immutable()) return false;
+        var fixed = this.fixed_value();
+        return !fixed || fixed._dot_throw(compressor);
+    });
+})(function(node, func) {
+    node.DEFMETHOD("_dot_throw", func);
+});
+
+export function is_lhs(node, parent) {
+    if (parent instanceof AST_Unary && unary_side_effects.has(parent.operator)) return parent.expression;
+    if (parent instanceof AST_Assign && parent.left === node) return node;
+    if (parent instanceof AST_ForIn && parent.init === node) return node;
+}
+
+// method to negate an expression
+(function(def_negate) {
+    function basic_negation(exp) {
+        return make_node(AST_UnaryPrefix, exp, {
+            operator: "!",
+            expression: exp
+        });
+    }
+    function best(orig, alt, first_in_statement) {
+        var negated = basic_negation(orig);
+        if (first_in_statement) {
+            var stat = make_node(AST_SimpleStatement, alt, {
+                body: alt
+            });
+            return best_of_expression(negated, stat) === stat ? alt : negated;
+        }
+        return best_of_expression(negated, alt);
+    }
+    def_negate(AST_Node, function() {
+        return basic_negation(this);
+    });
+    def_negate(AST_Statement, function() {
+        throw new Error("Cannot negate a statement");
+    });
+    def_negate(AST_Function, function() {
+        return basic_negation(this);
+    });
+    def_negate(AST_Class, function() {
+        return basic_negation(this);
+    });
+    def_negate(AST_Arrow, function() {
+        return basic_negation(this);
+    });
+    def_negate(AST_UnaryPrefix, function() {
+        if (this.operator == "!")
+            return this.expression;
+        return basic_negation(this);
+    });
+    def_negate(AST_Sequence, function(compressor) {
+        var expressions = this.expressions.slice();
+        expressions.push(expressions.pop().negate(compressor));
+        return make_sequence(this, expressions);
+    });
+    def_negate(AST_Conditional, function(compressor, first_in_statement) {
+        var self = this.clone();
+        self.consequent = self.consequent.negate(compressor);
+        self.alternative = self.alternative.negate(compressor);
+        return best(this, self, first_in_statement);
+    });
+    def_negate(AST_Binary, function(compressor, first_in_statement) {
+        var self = this.clone(), op = this.operator;
+        if (compressor.option("unsafe_comps")) {
+            switch (op) {
+              case "<=" : self.operator = ">"  ; return self;
+              case "<"  : self.operator = ">=" ; return self;
+              case ">=" : self.operator = "<"  ; return self;
+              case ">"  : self.operator = "<=" ; return self;
+            }
+        }
+        switch (op) {
+          case "==" : self.operator = "!="; return self;
+          case "!=" : self.operator = "=="; return self;
+          case "===": self.operator = "!=="; return self;
+          case "!==": self.operator = "==="; return self;
+          case "&&":
+            self.operator = "||";
+            self.left = self.left.negate(compressor, first_in_statement);
+            self.right = self.right.negate(compressor);
+            return best(this, self, first_in_statement);
+          case "||":
+            self.operator = "&&";
+            self.left = self.left.negate(compressor, first_in_statement);
+            self.right = self.right.negate(compressor);
+            return best(this, self, first_in_statement);
+        }
+        return basic_negation(this);
+    });
+})(function(node, func) {
+    node.DEFMETHOD("negate", function(compressor, first_in_statement) {
+        return func.call(this, compressor, first_in_statement);
+    });
+});
+
+(function (def_bitwise_negate) {
+    function basic_bitwise_negation(exp) {
+        return make_node(AST_UnaryPrefix, exp, {
+            operator: "~",
+            expression: exp
+        });
+    }
+
+    def_bitwise_negate(AST_Node, function(_compressor) {
+        return basic_bitwise_negation(this);
+    });
+
+    def_bitwise_negate(AST_Number, function(_compressor) {
+        const neg = ~this.value;
+        if (neg.toString().length > this.value.toString().length) {
+            return basic_bitwise_negation(this);
+        }
+        return make_node(AST_Number, this, { value: neg });
+    });
+
+    def_bitwise_negate(AST_UnaryPrefix, function(compressor, in_32_bit_context) {
+        if (
+            this.operator == "~"
+            && (
+                this.expression.is_32_bit_integer(compressor) ||
+                (in_32_bit_context != null ? in_32_bit_context : compressor.in_32_bit_context())
+            )
+        ) {
+            return this.expression;
+        } else {
+            return basic_bitwise_negation(this);
+        }
+    });
+})(function (node, func) {
+    node.DEFMETHOD("bitwise_negate", func);
+});
+
+// Is the callee of this function pure?
+var global_pure_fns = makePredicate("Boolean decodeURI decodeURIComponent Date encodeURI encodeURIComponent Error escape EvalError isFinite isNaN Number Object parseFloat parseInt RangeError ReferenceError String SyntaxError TypeError unescape URIError");
+AST_Call.DEFMETHOD("is_callee_pure", function(compressor) {
+    if (compressor.option("unsafe")) {
+        var expr = this.expression;
+        var first_arg;
+        if (
+            expr.expression && expr.expression.name === "hasOwnProperty" &&
+            (
+                (first_arg = (this.args && this.args[0] && this.args[0].evaluate(compressor))) == null
+                || first_arg.thedef && first_arg.thedef.undeclared
+            )
+        ) {
+            return false;
+        }
+        if (is_undeclared_ref(expr) && global_pure_fns.has(expr.name)) return true;
+        if (is_pure_builtin_call(compressor, this)) return true;
+    } else if (compressor.option("builtins_pure")) {
+        if (is_pure_builtin_call(compressor, this)) return true;
+    }
+    if ((this instanceof AST_New) && compressor.option("pure_new")) {
+        return true;
+    }
+    if (compressor.option("side_effects") && has_annotation(this, _PURE)) {
+        return true;
+    }
+    return !compressor.pure_funcs(this);
+});
+
+// If I call this, is it a pure function?
+AST_Node.DEFMETHOD("is_call_pure", return_false);
+AST_Dot.DEFMETHOD("is_call_pure", function(compressor) {
+    if (!compressor.option("unsafe")) return;
+    const expr = this.expression;
+
+    let native_obj;
+    if (expr instanceof AST_Array) {
+        native_obj = "Array";
+    } else if (expr.is_boolean()) {
+        native_obj = "Boolean";
+    } else if (expr.is_number(compressor)) {
+        native_obj = "Number";
+    } else if (expr instanceof AST_RegExp) {
+        native_obj = "RegExp";
+    } else if (expr.is_string(compressor)) {
+        native_obj = "String";
+    } else if (!this.may_throw_on_access(compressor)) {
+        native_obj = "Object";
+    }
+    return native_obj != null && compressor.is_pure_native_method(native_obj, this.property);
+});
+
+// tell me if a statement aborts
+export const aborts = (thing) => thing && thing.aborts();
+
+(function(def_aborts) {
+    def_aborts(AST_Statement, return_null);
+    def_aborts(AST_Jump, return_this);
+    function block_aborts() {
+        for (var i = 0; i < this.body.length; i++) {
+            if (aborts(this.body[i])) {
+                return this.body[i];
+            }
+        }
+        return null;
+    }
+    def_aborts(AST_Import, return_null);
+    def_aborts(AST_BlockStatement, block_aborts);
+    def_aborts(AST_SwitchBranch, block_aborts);
+    def_aborts(AST_DefClass, function () {
+        for (const prop of this.properties) {
+            if (prop instanceof AST_ClassStaticBlock) {
+                if (prop.aborts()) return prop;
+            }
+        }
+        return null;
+    });
+    def_aborts(AST_ClassStaticBlock, block_aborts);
+    def_aborts(AST_If, function() {
+        return this.alternative && aborts(this.body) && aborts(this.alternative) && this;
+    });
+})(function(node, func) {
+    node.DEFMETHOD("aborts", func);
+});
+
+AST_Node.DEFMETHOD("contains_this", function() {
+    return walk(this, node => {
+        if (node instanceof AST_This) return walk_abort;
+        if (
+            node !== this
+            && node instanceof AST_Scope
+            && !(node instanceof AST_Arrow)
+        ) {
+            return true;
+        }
+    });
+});
+
+export function is_modified(compressor, tw, node, value, level, immutable) {
+    var parent = tw.parent(level);
+    var lhs = is_lhs(node, parent);
+    if (lhs) return lhs;
+    if (!immutable
+        && parent instanceof AST_Call
+        && parent.expression === node
+        && !(value instanceof AST_Arrow)
+        && !(value instanceof AST_Class)
+        && !parent.is_callee_pure(compressor)
+        && (!(value instanceof AST_Function)
+            || !(parent instanceof AST_New) && value.contains_this())) {
+        return true;
+    }
+    if (parent instanceof AST_Array) {
+        return is_modified(compressor, tw, parent, parent, level + 1);
+    }
+    if (parent instanceof AST_ObjectKeyVal && node === parent.value) {
+        var obj = tw.parent(level + 1);
+        return is_modified(compressor, tw, obj, obj, level + 2);
+    }
+    if (parent instanceof AST_PropAccess && parent.expression === node) {
+        var prop = read_property(value, parent.property);
+        return !immutable && is_modified(compressor, tw, parent, prop, level + 1);
+    }
+}
+
+/**
+ * Check if a node may be used by the expression it's in
+ * void (0, 1, {node}, 2) -> false
+ * console.log(0, {node}) -> true
+ */
+export function is_used_in_expression(tw) {
+    for (let p = -1, node, parent; node = tw.parent(p), parent = tw.parent(p + 1); p++) {
+        if (parent instanceof AST_Sequence) {
+            const nth_expression = parent.expressions.indexOf(node);
+            if (nth_expression !== parent.expressions.length - 1) {
+                // Detect (0, x.noThis)() constructs
+                const grandparent = tw.parent(p + 2);
+                if (
+                    parent.expressions.length > 2
+                    || parent.expressions.length === 1
+                    || !requires_sequence_to_maintain_binding(grandparent, parent, parent.expressions[1])
+                ) {
+                    return false;
+                }
+                return true;
+            } else {
+                continue;
+            }
+        }
+        if (parent instanceof AST_Unary) {
+            const op = parent.operator;
+            if (op === "void") {
+                return false;
+            }
+            if (op === "typeof" || op === "+" || op === "-" || op === "!" || op === "~") {
+                continue;
+            }
+        }
+        if (
+            parent instanceof AST_SimpleStatement
+            || parent instanceof AST_LabeledStatement
+        ) {
+            return false;
+        }
+        if (parent instanceof AST_Scope) {
+            return false;
+        }
+        return true;
+    }
+
+    return true;
+}
Index: frontend/node_modules/terser/lib/compress/inline.js
===================================================================
--- frontend/node_modules/terser/lib/compress/inline.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/compress/inline.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,683 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+import {
+    AST_Array,
+    AST_Assign,
+    AST_Block,
+    AST_Call,
+    AST_Catch,
+    AST_Class,
+    AST_ClassExpression,
+    AST_DefaultAssign,
+    AST_DefClass,
+    AST_Defun,
+    AST_Destructuring,
+    AST_EmptyStatement,
+    AST_Expansion,
+    AST_Export,
+    AST_Function,
+    AST_IterationStatement,
+    AST_Lambda,
+    AST_Node,
+    AST_Number,
+    AST_Object,
+    AST_ObjectKeyVal,
+    AST_PropAccess,
+    AST_Return,
+    AST_Scope,
+    AST_SimpleStatement,
+    AST_Statement,
+    AST_SymbolDefun,
+    AST_SymbolFunarg,
+    AST_SymbolLambda,
+    AST_SymbolRef,
+    AST_SymbolVar,
+    AST_This,
+    AST_Toplevel,
+    AST_UnaryPrefix,
+    AST_Var,
+    AST_VarDef,
+
+    walk,
+
+    _INLINE,
+    _NOINLINE,
+    _PURE,
+} from "../ast.js";
+import { make_node, make_void_0, has_annotation } from "../utils/index.js";
+import "../size.js";
+
+import "./evaluate.js";
+import "./drop-side-effect-free.js";
+import "./reduce-vars.js";
+import {
+    SQUEEZED,
+    INLINED,
+    UNUSED,
+
+    has_flag,
+    set_flag,
+} from "./compressor-flags.js";
+import {
+    make_sequence,
+    best_of,
+    make_node_from_constant,
+    identifier_atom,
+    is_empty,
+    is_func_expr,
+    is_iife_call,
+    is_reachable,
+    is_recursive_ref,
+    retain_top_func,
+} from "./common.js";
+
+/**
+ * Module that contains the inlining logic.
+ *
+ * @module
+ *
+ * The stars of the show are `inline_into_symbolref` and `inline_into_call`.
+ */
+
+function within_array_or_object_literal(compressor) {
+    var node, level = 0;
+    while (node = compressor.parent(level++)) {
+        if (node instanceof AST_Statement) return false;
+        if (node instanceof AST_Array
+            || node instanceof AST_ObjectKeyVal
+            || node instanceof AST_Object) {
+            return true;
+        }
+    }
+    return false;
+}
+
+function scope_encloses_variables_in_this_scope(scope, pulled_scope) {
+    for (const enclosed of pulled_scope.enclosed) {
+        if (pulled_scope.variables.has(enclosed.name)) {
+            continue;
+        }
+        const looked_up = scope.find_variable(enclosed.name);
+        if (looked_up) {
+            if (looked_up === enclosed) continue;
+            return true;
+        }
+    }
+    return false;
+}
+
+/**
+ * An extra check function for `top_retain` option, compare the length of const identifier
+ * and init value length and return true if init value is longer than identifier. for example:
+ * ```
+ * // top_retain: ["example"]
+ * const example = 100
+ * ```
+ * it will return false because length of "100" is short than identifier "example".
+ */
+function is_const_symbol_short_than_init_value(def, fixed_value) {
+    if (def.orig.length === 1 && fixed_value) {
+        const init_value_length = fixed_value.size();
+        const identifer_length = def.name.length;
+        return init_value_length > identifer_length;
+    }
+    return true;
+}
+
+export function inline_into_symbolref(self, compressor) {
+    if (compressor.in_computed_key()) return self;
+
+    const parent = compressor.parent();
+    const def = self.definition();
+    const nearest_scope = compressor.find_scope();
+    let fixed = self.fixed_value();
+    if (
+        compressor.top_retain &&
+        def.global && 
+        compressor.top_retain(def) && 
+        // when identifier is in top_retain option dose not mean we can always inline it.
+        // if identifier name is longer then init value, we can replace it.
+        is_const_symbol_short_than_init_value(def, fixed)
+    ) {
+        // keep it
+        def.fixed = false;
+        def.single_use = false;
+        return self;
+    }
+
+    if (dont_inline_lambda_in_loop(compressor, fixed)) return self;
+
+    let single_use = def.single_use
+        && !(parent instanceof AST_Call
+            && (parent.is_callee_pure(compressor))
+                || has_annotation(parent, _NOINLINE))
+        && !(parent instanceof AST_Export
+            && fixed instanceof AST_Lambda
+            && fixed.name);
+
+    if (single_use && fixed instanceof AST_Node) {
+        single_use =
+            !fixed.has_side_effects(compressor)
+            && !fixed.may_throw(compressor);
+    }
+
+    if (fixed instanceof AST_Class && def.scope !== self.scope) {
+        return self;
+    }
+
+    if (single_use && (fixed instanceof AST_Lambda || fixed instanceof AST_Class)) {
+        if (retain_top_func(fixed, compressor)) {
+            single_use = false;
+        } else if (def.scope !== self.scope
+            && (def.escaped == 1
+                || has_flag(fixed, INLINED)
+                || within_array_or_object_literal(compressor)
+                || !compressor.option("reduce_funcs"))) {
+            single_use = false;
+        } else if (is_recursive_ref(compressor, def)) {
+            single_use = false;
+        } else if (def.scope !== self.scope || def.orig[0] instanceof AST_SymbolFunarg) {
+            single_use = fixed.is_constant_expression(self.scope);
+            if (single_use == "f") {
+                var scope = self.scope;
+                do {
+                    if (scope instanceof AST_Defun || is_func_expr(scope)) {
+                        set_flag(scope, INLINED);
+                    }
+                } while (scope = scope.parent_scope);
+            }
+        }
+    }
+
+    if (single_use && (fixed instanceof AST_Lambda || fixed instanceof AST_Class)) {
+        single_use =
+            def.scope === self.scope
+                && !scope_encloses_variables_in_this_scope(nearest_scope, fixed)
+            || parent instanceof AST_Call
+                && parent.expression === self
+                && !scope_encloses_variables_in_this_scope(nearest_scope, fixed)
+                && !(fixed.name && fixed.name.definition().recursive_refs > 0);
+    }
+
+    if (single_use && fixed) {
+        if (fixed instanceof AST_DefClass) {
+            set_flag(fixed, SQUEEZED);
+            fixed = make_node(AST_ClassExpression, fixed, fixed);
+        }
+        if (fixed instanceof AST_Defun) {
+            set_flag(fixed, SQUEEZED);
+            fixed = make_node(AST_Function, fixed, fixed);
+        }
+        if (def.recursive_refs > 0 && fixed.name instanceof AST_SymbolDefun) {
+            const defun_def = fixed.name.definition();
+            let lambda_def = fixed.variables.get(fixed.name.name);
+            let name = lambda_def && lambda_def.orig[0];
+            if (!(name instanceof AST_SymbolLambda)) {
+                name = make_node(AST_SymbolLambda, fixed.name, fixed.name);
+                name.scope = fixed;
+                fixed.name = name;
+                lambda_def = fixed.def_function(name);
+            }
+            walk(fixed, node => {
+                if (node instanceof AST_SymbolRef && node.definition() === defun_def) {
+                    node.thedef = lambda_def;
+                    lambda_def.references.push(node);
+                }
+            });
+        }
+        if (
+            (fixed instanceof AST_Lambda || fixed instanceof AST_Class)
+            && fixed.parent_scope !== nearest_scope
+        ) {
+            fixed = fixed.clone(true, compressor.get_toplevel());
+
+            nearest_scope.add_child_scope(fixed);
+        }
+        return fixed.optimize(compressor);
+    }
+
+    // multiple uses
+    if (fixed) {
+        let replace;
+
+        if (fixed instanceof AST_This) {
+            if (!(def.orig[0] instanceof AST_SymbolFunarg)
+                && def.references.every((ref) =>
+                    def.scope === ref.scope
+                )) {
+                replace = fixed;
+            }
+        } else {
+            var ev = fixed.evaluate(compressor);
+            if (
+                ev !== fixed
+                && (compressor.option("unsafe_regexp") || !(ev instanceof RegExp))
+            ) {
+                replace = make_node_from_constant(ev, fixed);
+            }
+        }
+
+        if (replace) {
+            const name_length = self.size(compressor);
+            const replace_size = replace.size(compressor);
+
+            let overhead = 0;
+            if (compressor.option("unused") && !compressor.exposed(def)) {
+                overhead =
+                    (name_length + 2 + fixed.size(compressor)) /
+                    (def.references.length - def.assignments);
+            }
+
+            if (replace_size <= name_length + overhead) {
+                return replace;
+            }
+        }
+    }
+
+    return self;
+}
+
+export function inline_into_call(self, compressor) {
+    if (compressor.in_computed_key()) return self;
+
+    var exp = self.expression;
+    var fn = exp;
+    var simple_args = self.args.every((arg) => !(arg instanceof AST_Expansion));
+
+    if (compressor.option("reduce_vars")
+        && fn instanceof AST_SymbolRef
+        && !has_annotation(self, _NOINLINE)
+    ) {
+        const fixed = fn.fixed_value();
+
+        if (
+            retain_top_func(fixed, compressor)
+            || !compressor.toplevel.funcs && exp.definition().global
+        ) {
+            return self;
+        }
+
+        fn = fixed;
+    }
+
+    if (
+        dont_inline_lambda_in_loop(compressor, fn)
+        && !has_annotation(self, _INLINE)
+    ) return self;
+
+    var is_func = fn instanceof AST_Lambda;
+
+    var stat = is_func && fn.body[0];
+    var is_regular_func = is_func && !fn.is_generator && !fn.async;
+    var can_inline = is_regular_func && compressor.option("inline") && !self.is_callee_pure(compressor);
+    if (can_inline && stat instanceof AST_Return) {
+        let returned = stat.value;
+        if (!returned || returned.is_constant_expression()) {
+            if (returned) {
+                returned = returned.clone(true);
+            } else {
+                returned = make_void_0(self);
+            }
+            const args = self.args.concat(returned);
+            return make_sequence(self, args).optimize(compressor);
+        }
+
+        // optimize identity function
+        if (
+            fn.argnames.length === 1
+            && (fn.argnames[0] instanceof AST_SymbolFunarg)
+            && self.args.length < 2
+            && !(self.args[0] instanceof AST_Expansion)
+            && returned instanceof AST_SymbolRef
+            && returned.name === fn.argnames[0].name
+        ) {
+            const replacement =
+                (self.args[0] || make_void_0()).optimize(compressor);
+
+            let parent;
+            if (
+                replacement instanceof AST_PropAccess
+                && (parent = compressor.parent()) instanceof AST_Call
+                && parent.expression === self
+            ) {
+                // identity function was being used to remove `this`, like in
+                //
+                // id(bag.no_this)(...)
+                //
+                // Replace with a larger but more effish (0, bag.no_this) wrapper.
+
+                return make_sequence(self, [
+                    make_node(AST_Number, self, { value: 0 }),
+                    replacement
+                ]);
+            }
+            // replace call with first argument or undefined if none passed
+            return replacement;
+        }
+    }
+
+    if (can_inline) {
+        var scope, in_loop, level = -1;
+        let def;
+        let returned_value;
+        let nearest_scope;
+        if (simple_args
+            && !fn.uses_arguments
+            && !(compressor.parent() instanceof AST_Class)
+            && !(fn.name && fn instanceof AST_Function)
+            && (returned_value = can_flatten_body(stat))
+            && (exp === fn
+                || has_annotation(self, _INLINE)
+                || compressor.option("unused")
+                    && (def = exp.definition()).references.length == 1
+                    && !is_recursive_ref(compressor, def)
+                    && fn.is_constant_expression(exp.scope))
+            && !has_annotation(self, _PURE | _NOINLINE)
+            && !fn.contains_this()
+            && can_inject_symbols()
+            && (nearest_scope = compressor.find_scope())
+            && !scope_encloses_variables_in_this_scope(nearest_scope, fn)
+            && !(function in_default_assign() {
+                    // Due to the fact function parameters have their own scope
+                    // which can't use `var something` in the function body within,
+                    // we simply don't inline into DefaultAssign.
+                    let i = 0;
+                    let p;
+                    while ((p = compressor.parent(i++))) {
+                        if (p instanceof AST_DefaultAssign) return true;
+                        if (p instanceof AST_Block) break;
+                    }
+                    return false;
+                })()
+            && !(scope instanceof AST_Class)
+        ) {
+            set_flag(fn, SQUEEZED);
+            nearest_scope.add_child_scope(fn);
+            return make_sequence(self, flatten_fn(returned_value)).optimize(compressor);
+        }
+    }
+
+    if (can_inline && has_annotation(self, _INLINE)) {
+        set_flag(fn, SQUEEZED);
+        fn = make_node(fn.CTOR === AST_Defun ? AST_Function : fn.CTOR, fn, fn);
+        fn = fn.clone(true);
+        fn.figure_out_scope({}, {
+            parent_scope: compressor.find_scope(),
+            toplevel: compressor.get_toplevel()
+        });
+
+        return make_node(AST_Call, self, {
+            expression: fn,
+            args: self.args,
+        }).optimize(compressor);
+    }
+
+    const can_drop_this_call = is_regular_func && compressor.option("side_effects") && fn.body.every(is_empty);
+    if (can_drop_this_call) {
+        var args = self.args.concat(make_void_0(self));
+        return make_sequence(self, args).optimize(compressor);
+    }
+
+    if (compressor.option("negate_iife")
+        && compressor.parent() instanceof AST_SimpleStatement
+        && is_iife_call(self)) {
+        return self.negate(compressor, true);
+    }
+
+    var ev = self.evaluate(compressor);
+    if (ev !== self) {
+        ev = make_node_from_constant(ev, self).optimize(compressor);
+        return best_of(compressor, ev, self);
+    }
+
+    return self;
+
+    function return_value(stat) {
+        if (!stat) return make_void_0(self);
+        if (stat instanceof AST_Return) {
+            if (!stat.value) return make_void_0(self);
+            return stat.value.clone(true);
+        }
+        if (stat instanceof AST_SimpleStatement) {
+            return make_node(AST_UnaryPrefix, stat, {
+                operator: "void",
+                expression: stat.body.clone(true)
+            });
+        }
+    }
+
+    function can_flatten_body(stat) {
+        var body = fn.body;
+        var len = body.length;
+        if (compressor.option("inline") < 3) {
+            return len == 1 && return_value(stat);
+        }
+        stat = null;
+        for (var i = 0; i < len; i++) {
+            var line = body[i];
+            if (line instanceof AST_Var) {
+                if (stat && !line.definitions.every((var_def) =>
+                    !var_def.value
+                )) {
+                    return false;
+                }
+            } else if (stat) {
+                return false;
+            } else if (!(line instanceof AST_EmptyStatement)) {
+                stat = line;
+            }
+        }
+        return return_value(stat);
+    }
+
+    function can_inject_args(block_scoped, safe_to_inject) {
+        for (var i = 0, len = fn.argnames.length; i < len; i++) {
+            var arg = fn.argnames[i];
+            if (arg instanceof AST_DefaultAssign) {
+                if (has_flag(arg.left, UNUSED)) continue;
+                return false;
+            }
+            if (arg instanceof AST_Destructuring) return false;
+            if (arg instanceof AST_Expansion) {
+                if (has_flag(arg.expression, UNUSED)) continue;
+                return false;
+            }
+            if (has_flag(arg, UNUSED)) continue;
+            if (!safe_to_inject
+                || block_scoped.has(arg.name)
+                || identifier_atom.has(arg.name)
+                || scope.conflicting_def(arg.name)) {
+                return false;
+            }
+            if (in_loop) in_loop.push(arg.definition());
+        }
+        return true;
+    }
+
+    function can_inject_vars(block_scoped, safe_to_inject) {
+        var len = fn.body.length;
+        for (var i = 0; i < len; i++) {
+            var stat = fn.body[i];
+            if (!(stat instanceof AST_Var)) continue;
+            if (!safe_to_inject) return false;
+            for (var j = stat.definitions.length; --j >= 0;) {
+                var name = stat.definitions[j].name;
+                if (name instanceof AST_Destructuring
+                    || block_scoped.has(name.name)
+                    || identifier_atom.has(name.name)
+                    || scope.conflicting_def(name.name)) {
+                    return false;
+                }
+                if (in_loop) in_loop.push(name.definition());
+            }
+        }
+        return true;
+    }
+
+    function can_inject_symbols() {
+        var block_scoped = new Set();
+        do {
+            scope = compressor.parent(++level);
+            if (scope.is_block_scope() && scope.block_scope) {
+                // TODO this is sometimes undefined during compression.
+                // But it should always have a value!
+                scope.block_scope.variables.forEach(function (variable) {
+                    block_scoped.add(variable.name);
+                });
+            }
+            if (scope instanceof AST_Catch) {
+                // TODO can we delete? AST_Catch is a block scope.
+                if (scope.argname) {
+                    block_scoped.add(scope.argname.name);
+                }
+            } else if (scope instanceof AST_IterationStatement) {
+                in_loop = [];
+            } else if (scope instanceof AST_SymbolRef) {
+                if (scope.fixed_value() instanceof AST_Scope) return false;
+            }
+        } while (!(scope instanceof AST_Scope));
+
+        var safe_to_inject = !(scope instanceof AST_Toplevel) || compressor.toplevel.vars;
+        var inline = compressor.option("inline");
+        if (!can_inject_vars(block_scoped, inline >= 3 && safe_to_inject)) return false;
+        if (!can_inject_args(block_scoped, inline >= 2 && safe_to_inject)) return false;
+        return !in_loop || in_loop.length == 0 || !is_reachable(fn, in_loop);
+    }
+
+    function append_var(decls, expressions, name, value) {
+        var def = name.definition();
+
+        // Name already exists, only when a function argument had the same name
+        const already_appended = scope.variables.has(name.name);
+        if (!already_appended) {
+            scope.variables.set(name.name, def);
+            scope.enclosed.push(def);
+            decls.push(make_node(AST_VarDef, name, {
+                name: name,
+                value: null
+            }));
+        }
+
+        var sym = make_node(AST_SymbolRef, name, name);
+        def.references.push(sym);
+        if (value) expressions.push(make_node(AST_Assign, self, {
+            operator: "=",
+            logical: false,
+            left: sym,
+            right: value.clone()
+        }));
+    }
+
+    function flatten_args(decls, expressions) {
+        var len = fn.argnames.length;
+        for (var i = self.args.length; --i >= len;) {
+            expressions.push(self.args[i]);
+        }
+        for (i = len; --i >= 0;) {
+            var name = fn.argnames[i];
+            var value = self.args[i];
+            if (has_flag(name, UNUSED) || !name.name || scope.conflicting_def(name.name)) {
+                if (value) expressions.push(value);
+            } else {
+                var symbol = make_node(AST_SymbolVar, name, name);
+                name.definition().orig.push(symbol);
+                if (!value && in_loop) value = make_void_0(self);
+                append_var(decls, expressions, symbol, value);
+            }
+        }
+        decls.reverse();
+        expressions.reverse();
+    }
+
+    function flatten_vars(decls, expressions) {
+        var pos = expressions.length;
+        for (var i = 0, lines = fn.body.length; i < lines; i++) {
+            var stat = fn.body[i];
+            if (!(stat instanceof AST_Var)) continue;
+            for (var j = 0, defs = stat.definitions.length; j < defs; j++) {
+                var var_def = stat.definitions[j];
+                var name = var_def.name;
+                append_var(decls, expressions, name, var_def.value);
+                if (in_loop && fn.argnames.every((argname) =>
+                    argname.name != name.name
+                )) {
+                    var def = fn.variables.get(name.name);
+                    var sym = make_node(AST_SymbolRef, name, name);
+                    def.references.push(sym);
+                    expressions.splice(pos++, 0, make_node(AST_Assign, var_def, {
+                        operator: "=",
+                        logical: false,
+                        left: sym,
+                        right: make_void_0(name),
+                    }));
+                }
+            }
+        }
+    }
+
+    function flatten_fn(returned_value) {
+        var decls = [];
+        var expressions = [];
+        flatten_args(decls, expressions);
+        flatten_vars(decls, expressions);
+        expressions.push(returned_value);
+
+        if (decls.length) {
+            const i = scope.body.indexOf(compressor.parent(level - 1)) + 1;
+            scope.body.splice(i, 0, make_node(AST_Var, fn, {
+                definitions: decls
+            }));
+        }
+
+        return expressions.map(exp => exp.clone(true));
+    }
+}
+
+/** prevent inlining functions into loops, for performance reasons */
+function dont_inline_lambda_in_loop(compressor, maybe_lambda) {
+    return (
+        (maybe_lambda instanceof AST_Lambda || maybe_lambda instanceof AST_Class)
+        && !!compressor.is_within_loop()
+    );
+}
Index: frontend/node_modules/terser/lib/compress/native-objects.js
===================================================================
--- frontend/node_modules/terser/lib/compress/native-objects.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/compress/native-objects.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,538 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+import { AST_Array, AST_Dot, AST_New, AST_Number, AST_SymbolRef } from "../ast.js";
+import { makePredicate } from "../utils/index.js";
+import { is_undeclared_ref } from "./inference.js";
+
+// Lists of native methods, useful for `unsafe` option which assumes they exist.
+// Note: Lots of methods and functions are missing here, in case they aren't pure
+// or not available in all JS environments.
+
+const make_nested_lookup = (feature_callback) => (compressor) => {
+    const obj = feature_callback(feature_variables(compressor));
+
+    const out = new Map();
+    for (var key of Object.keys(obj)) {
+        if (obj[key]) {
+            out.set(key, makePredicate(remove_false(obj[key])));
+        }
+    }
+
+    const does_have = (global_name, fname) => {
+        const inner_map = out.get(global_name);
+        return inner_map != null && inner_map.has(fname);
+    };
+    return does_have;
+};
+
+const make_lookup = (feature_callback) => (compressor) => {
+    const obj = feature_callback(feature_variables(compressor));
+
+    const predicate = makePredicate(remove_false(obj));
+    const does_have = (global_name) => {
+        return predicate.has(global_name);
+    };
+    return does_have;
+};
+
+function remove_false(arr) {
+    for (let i = 0; i < arr.length; i++) {
+        if (arr[i] === false) {
+            arr.splice(i, 1);
+            i--;
+        }
+    }
+    return arr;
+}
+
+/** Generate the object with arguments seen below */
+function feature_variables(compressor) {
+    return {
+        sloppy: compressor.option("unsafe"),
+        es: compressor.option("builtins_ecma"),
+    };
+}
+
+// eslint-disable-next-line no-unused-vars
+export const pure_access_globals = make_lookup(({ sloppy, es }) => [
+    "Array",
+    "Boolean",
+    "clearInterval",
+    "clearTimeout",
+    "console",
+    "Date",
+    "decodeURI",
+    "decodeURIComponent",
+    "encodeURI",
+    "encodeURIComponent",
+    "Error",
+    "escape",
+    "eval",
+    "EvalError",
+    "Function",
+    es >= 2020 && "globalThis",
+    "isFinite",
+    "isNaN",
+    "JSON",
+    "Math",
+    "Number",
+    "parseFloat",
+    "parseInt",
+    "RangeError",
+    "ReferenceError",
+    "RegExp",
+    "Object",
+    "setInterval",
+    "setTimeout",
+    "String",
+    "SyntaxError",
+    "TypeError",
+    "unescape",
+    "URIError",
+]);
+
+// Objects which are safe to access without throwing or causing a side effect.
+// Usually we'd check the `unsafe` option first but these are way too common for that
+export const pure_prop_access_globals = new Set([
+    "Number",
+    "String",
+    "Array",
+    "Object",
+    "Function",
+    "Promise",
+]);
+
+// eslint-disable-next-line no-unused-vars
+export const is_pure_native_fn = make_lookup(({ sloppy, es }) => [
+    sloppy && es >= 2021 && "AggregateError",
+    "Array",
+    "ArrayBuffer",
+    es >= 2020 && "BigInt",
+    es >= 2020 && "BigInt64Array",
+    es >= 2020 && "BigUint64Array",
+    "Boolean",
+    "Date",
+    sloppy && "decodeURI",
+    sloppy && "decodeURIComponent",
+    sloppy && "encodeURI",
+    sloppy && "encodeURIComponent",
+    "Error",
+    "escape",
+    "EvalError",
+    es >= 2021 && "FinalizationRegistry",
+    es >= 2026 && "Float16Array",
+    "Float32Array",
+    "Float64Array",
+    "Int16Array",
+    "Int32Array",
+    "Int8Array",
+    "isFinite",
+    "isNaN",
+    es >= 2026 && "Iterator",
+    es >= 2015 && "Map",
+    "Number",
+    "parseFloat",
+    "parseInt",
+    es >= 2015 && "Promise",
+    es >= 2015 && "Proxy",
+    "RangeError",
+    "ReferenceError",
+    sloppy && "RegExp",
+    es >= 2015 && "Set",
+    "String",
+    es >= 2015 && "Symbol",
+    "SyntaxError",
+    "TypeError",
+    "Uint16Array",
+    "Uint32Array",
+    "Uint8Array",
+    "Uint8ClampedArray",
+    sloppy && "unescape",
+    "URIError",
+    sloppy && es >= 2015 && "WeakMap",
+    sloppy && es >= 2021 && "WeakRef",
+    sloppy && es >= 2015 && "WeakSet",
+]);
+
+const arg1_is_iterable = new Set([
+    "Map",
+    "Set",
+    "WeakMap",
+    "WeakSet",
+]);
+const arg1_is_range_or_iterable = new Set([
+    "ArrayBuffer",
+    "Float32Array",
+    "Float64Array",
+    "Int16Array",
+    "Int32Array",
+    "Int8Array",
+    "Uint16Array",
+    "Uint32Array",
+    "Uint8Array",
+    "Uint8ClampedArray",
+]);
+const lone_arg_is_range = new Set(["Array"]);
+
+const object_methods = [
+    "constructor",
+    "toString",
+    "valueOf",
+];
+
+// eslint-disable-next-line no-unused-vars
+export const is_pure_native_method = make_nested_lookup(({ sloppy, es }) => ({
+    Array: [
+        es >= 2022 && "at",
+        es >= 2019 && "flat",
+        es >= 2016 && "includes",
+        "indexOf",
+        "join",
+        "lastIndexOf",
+        "slice",
+        ...object_methods,
+    ],
+    Boolean: object_methods,
+    Function: object_methods,
+    Number: [
+        "toExponential",
+        "toFixed",
+        "toPrecision",
+        ...object_methods,
+    ],
+    Object: object_methods,
+    RegExp: [
+        "test",
+        ...object_methods,
+    ],
+    String: [
+        es >= 2022 && "at",
+        "charAt",
+        "charCodeAt",
+        es >= 2015 && "codePointAt",
+        "concat",
+        es >= 2025 && "endsWith",
+        es >= 2015 && "includes",
+        "indexOf",
+        "italics",
+        "lastIndexOf",
+        es >= 2020 && "localeCompare",
+        "match",
+        es >= 2020 && "matchAll",
+        es >= 2015 && "normalize",
+        es >= 2017 && "padStart",
+        es >= 2017 && "padEnd",
+        es >= 2015 && sloppy && "repeat",
+        "replace",
+        es >= 2021 && "replaceAll",
+        "search",
+        "slice",
+        "split",
+        es >= 2015 && "startsWith",
+        "substr",
+        "substring",
+        es >= 2015 && "repeat",
+        "toLocaleLowerCase",
+        "toLocaleUpperCase",
+        "toLowerCase",
+        "toUpperCase",
+        "trim",
+        es >= 2019 && "trimEnd",
+        es >= 2019 && "trimStart",
+        es >= 2019 && "trimLeft",
+        es >= 2019 && "trimRight",
+        ...object_methods,
+    ],
+}));
+
+// eslint-disable-next-line no-unused-vars
+export const is_pure_native_static_fn = make_nested_lookup(({ sloppy, es }) => ({
+    Array: [
+        "isArray",
+        es >= 2015 && "of",
+    ],
+    ArrayBuffer: [
+        "isView",
+    ],
+    BigInt: es >= 2020 && [
+        sloppy && "asIntN",
+        sloppy && "asUintN",
+    ],
+    BigInt64Array: sloppy && es >= 2020 && ["of"],
+    BigUint64Array: sloppy && es >= 2020 && ["of"],
+    Date: [
+        "now",
+        "parse",
+        "UTC",
+    ],
+    Error: [
+        es >= 2026 && "isError",
+    ],
+    Float16Array: sloppy && es >= 2026 && ["of"],
+    Float32Array: sloppy && ["of"],
+    Float64Array: sloppy && ["of"],
+    Int16Array: sloppy && ["of"],
+    Int32Array: sloppy && ["of"],
+    Int8Array: sloppy && ["of"],
+    Math: [
+        "abs",
+        "acos",
+        es >= 2015 && "acosh",
+        "asin",
+        es >= 2015 && "asinh",
+        "atan",
+        "atan2",
+        es >= 2015 && "atanh",
+        es >= 2015 && "cbrt",
+        "ceil",
+        es >= 2015 && "clz32",
+        "cos",
+        es >= 2015 && "cosh",
+        "exp",
+        es >= 2015 && "expm1",
+        "floor",
+        es >= 2026 && "f16round",
+        es >= 2015 && "fround",
+        es >= 2015 && "hypot",
+        es >= 2015 && "imul",
+        "log",
+        es >= 2015 && "log10",
+        es >= 2015 && "log1p",
+        es >= 2015 && "log2",
+        "max",
+        "min",
+        "pow",
+        "round",
+        es >= 2015 && "sign",
+        "sin",
+        es >= 2015 && "sinh",
+        "sqrt",
+        "tan",
+        es >= 2015 && "tanh",
+        es >= 2015 && "trunc",
+    ],
+    Number: [
+        es >= 2015 && "isFinite",
+        es >= 2015 && "isInteger",
+        es >= 2015 && "isSafeInteger",
+        es >= 2015 && "isNaN",
+        es >= 2015 && "parseFloat",
+        es >= 2015 && "parseInt",
+    ],
+    Object: [
+        sloppy && "create",
+        sloppy && "getOwnPropertyDescriptor",
+        es >= 2017 && sloppy && "getOwnPropertyDescriptors",
+        sloppy && "getOwnPropertyNames",
+        es >= 2015 && sloppy && "getOwnPropertySymbols",
+        sloppy && "getPrototypeOf",
+        es >= 2022 && sloppy && "hasOwn",
+        es >= 2015 && "is",
+        "isExtensible",
+        "isFrozen",
+        "isSealed",
+        es >= 2015 && sloppy && "keys",
+    ],
+    Promise: es >= 2015 && [
+        es >= 2024 && "withResolvers",
+    ],
+    Proxy: es >= 2015 && [
+        sloppy && "revocable",
+    ],
+    Reflect: es >= 2015 && [
+        sloppy && "has",
+        sloppy && "isExtensible",
+        sloppy && "ownKeys",
+    ],
+    RegExp: [
+        es >= 2026 && sloppy && "escape",
+    ],
+    String: [
+        "fromCharCode",
+        sloppy && es >= 2025 && "fromCodePoint",
+    ],
+    Uint16Array: ["of"],
+    Uint32Array: ["of"],
+    Uint8Array: ["of"],
+    Uint8ClampedArray: ["of"],
+}));
+
+// Known numeric values which come with JS environments
+// eslint-disable-next-line no-unused-vars
+export const is_pure_native_static_property = make_nested_lookup(({ sloppy, es }) => ({
+    Math: [
+        "E",
+        "LN10",
+        "LN2",
+        "LOG2E",
+        "LOG10E",
+        "PI",
+        "SQRT1_2",
+        "SQRT2",
+    ],
+    Number: [
+        es >= 2015 && "EPSILON",
+        es >= 2015 && "MAX_SAFE_VALUE",
+        "MAX_VALUE",
+        es >= 2015 && "MIN_SAFE_VALUE",
+        "MIN_VALUE",
+        "NaN",
+        "NEGATIVE_INFINITY",
+        "POSITIVE_INFINITY",
+    ],
+    RegExp: [
+        "$_",
+        "$0",
+        "$1",
+        "$2",
+        "$3",
+        "$4",
+        "$5",
+        "$6",
+        "$7",
+        "$8",
+        "$9",
+        "input",
+        "lastMatch",
+        "lastParen",
+        "leftContext",
+        "rightContext",
+    ],
+}));
+
+const re_uppercase_first_letter = /^[A-Z]/;
+export function is_pure_builtin_call(compressor, call) {
+    let builtin = "";
+    let method = "";
+
+    let exp = call.expression;
+    if (is_undeclared_ref(exp)) {
+        builtin = exp.name;
+    } else if (exp instanceof AST_Dot) {
+        method = exp.property;
+
+        exp = exp.expression;
+        if (is_undeclared_ref(exp)) {
+            if (
+                // globalThis.pureFunc()
+                exp.name === "globalThis"
+                && compressor.option("builtins_ecma") >= 2020
+            ) {
+                builtin = method;
+                method = "";
+            } else {
+                // SomeBuiltin.pureFunc()
+                builtin = exp.name;
+            }
+        } else if (exp instanceof AST_Dot) {
+            if (
+                is_undeclared_ref(exp.expression)
+                && exp.expression.name === "globalThis"
+                && compressor.option("builtins_ecma") >= 2020
+            ) {
+                // globalThis.SomeBuiltin.pureFunc()
+                builtin = exp.property;
+            } else {
+                return false;
+            }
+        } else {
+            return false;
+        }
+    } else {
+        return false;
+    }
+
+    if (!method) {
+        if (compressor.is_pure_native_fn(builtin)) {
+            // some require `new`, others throw if you use it
+            const is_new = call instanceof AST_New;
+            const should_be_new = re_uppercase_first_letter.test(builtin); // true of all `is_pure_native_fn`
+            if (is_new !== should_be_new) return false;
+
+            if (!is_builtin_pure_with_these_args(builtin, call.args)) {
+                return false;
+            }
+
+            return true;
+        }
+
+        return false;
+    } else {
+        return compressor.is_pure_native_static_fn(builtin, method);
+    }
+}
+
+/** Some builtins are listed above but their purity is subject to some conditions */
+function is_builtin_pure_with_these_args(builtin, args) {
+    // all the builtins we deal with here are ok with getting 0 args
+    if (args.length === 0) return true;
+
+    let arg1 = args[0];
+    if (arg1 instanceof AST_SymbolRef) {
+        arg1 = arg1.fixed_value();
+    }
+
+    if (lone_arg_is_range.has(builtin)) { // new Array(number)
+        const arg_valid = args.length > 1
+            || arg1 instanceof AST_Number
+                && arg1.value >= 0 && arg1.value <= 0xffffffff;
+            // TODO: or, we are asked to ignore TypeError
+        if (!arg_valid) return false;
+    }
+
+    if (arg1_is_range_or_iterable.has(builtin)) { // new Float32Array(number | Array)
+        const arg_valid = args.length === 0
+            || arg1 instanceof AST_Array
+            || arg1 instanceof AST_Number
+                && arg1.value >= 0 && arg1.value <= 0xffffffff;
+        if (!arg_valid) return false;
+    }
+
+    if (arg1_is_iterable.has(builtin)) { // new Set(iterable)
+        const arg_valid = args.length === 0 || arg1 instanceof AST_Array;
+        if (!arg_valid) return false;
+    }
+
+    return true;
+}
Index: frontend/node_modules/terser/lib/compress/reduce-vars.js
===================================================================
--- frontend/node_modules/terser/lib/compress/reduce-vars.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/compress/reduce-vars.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,864 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+import {
+    AST_Accessor,
+    AST_Array,
+    AST_Assign,
+    AST_Await,
+    AST_Binary,
+    AST_Block,
+    AST_Call,
+    AST_Case,
+    AST_Chain,
+    AST_Class,
+    AST_ClassStaticBlock,
+    AST_ClassExpression,
+    AST_Conditional,
+    AST_Default,
+    AST_Defun,
+    AST_Destructuring,
+    AST_Do,
+    AST_Exit,
+    AST_Expansion,
+    AST_For,
+    AST_ForIn,
+    AST_If,
+    AST_LabeledStatement,
+    AST_Lambda,
+    AST_New,
+    AST_Node,
+    AST_Number,
+    AST_ObjectKeyVal,
+    AST_PropAccess,
+    AST_Scope,
+    AST_Sequence,
+    AST_SimpleStatement,
+    AST_Symbol,
+    AST_SymbolCatch,
+    AST_SymbolConst,
+    AST_SymbolDeclaration,
+    AST_SymbolDefun,
+    AST_SymbolFunarg,
+    AST_SymbolLambda,
+    AST_SymbolRef,
+    AST_This,
+    AST_Toplevel,
+    AST_Try,
+    AST_Unary,
+    AST_UnaryPrefix,
+    AST_UsingDef,
+    AST_VarDef,
+    AST_VarDefLike,
+    AST_While,
+    AST_Yield,
+
+    walk,
+    walk_body,
+    walk_parent,
+} from "../ast.js";
+import { HOP, make_node, make_void_0, noop } from "../utils/index.js";
+
+import { lazy_op, is_modified, is_lhs } from "./inference.js";
+import { INLINED, clear_flag } from "./compressor-flags.js";
+import { read_property, has_break_or_continue, is_recursive_ref } from "./common.js";
+
+/**
+ * Define the method AST_Node#reduce_vars, which goes through the AST in
+ * execution order to perform basic flow analysis
+ */
+function def_reduce_vars(node, func) {
+    node.DEFMETHOD("reduce_vars", func);
+}
+
+def_reduce_vars(AST_Node, noop);
+
+/** Clear definition properties */
+function reset_def(compressor, def) {
+    def.assignments = 0;
+    def.chained = false;
+    def.direct_access = false;
+    def.escaped = 0;
+    def.recursive_refs = 0;
+    def.references = [];
+    def.single_use = undefined;
+    if (
+        def.scope.pinned()
+        || (def.orig[0] instanceof AST_SymbolFunarg && def.scope.uses_arguments)
+    ) {
+        def.fixed = false;
+    } else if (def.orig[0] instanceof AST_SymbolConst || !compressor.exposed(def)) {
+        def.fixed = def.init;
+    } else {
+        def.fixed = false;
+    }
+}
+
+function reset_variables(tw, compressor, node) {
+    node.variables.forEach(function(def) {
+        reset_def(compressor, def);
+        if (def.fixed === null) {
+            tw.defs_to_safe_ids.set(def.id, tw.safe_ids);
+            mark(tw, def, true);
+        } else if (def.fixed) {
+            tw.loop_ids.set(def.id, tw.in_loop);
+            mark(tw, def, true);
+        }
+    });
+}
+
+function reset_block_variables(compressor, node) {
+    if (node.block_scope) node.block_scope.variables.forEach((def) => {
+        reset_def(compressor, def);
+    });
+}
+
+function push(tw) {
+    tw.safe_ids = Object.create(tw.safe_ids);
+}
+
+function pop(tw) {
+    tw.safe_ids = Object.getPrototypeOf(tw.safe_ids);
+}
+
+function mark(tw, def, safe) {
+    tw.safe_ids[def.id] = safe;
+}
+
+function safe_to_read(tw, def) {
+    if (def.single_use == "m") return false;
+    if (tw.safe_ids[def.id]) {
+        if (def.fixed == null) {
+            var orig = def.orig[0];
+            if (orig instanceof AST_SymbolFunarg || orig.name == "arguments") return false;
+            def.fixed = make_void_0(orig);
+        }
+        return true;
+    }
+    return def.fixed instanceof AST_Defun;
+}
+
+function safe_to_assign(tw, def, scope, value) {
+    if (def.fixed === undefined) return true;
+    let def_safe_ids;
+    if (def.fixed === null
+        && (def_safe_ids = tw.defs_to_safe_ids.get(def.id))
+    ) {
+        def_safe_ids[def.id] = false;
+        tw.defs_to_safe_ids.delete(def.id);
+        return true;
+    }
+    if (!HOP(tw.safe_ids, def.id)) return false;
+    if (!safe_to_read(tw, def)) return false;
+    if (def.fixed === false) return false;
+    if (def.fixed != null && (!value || def.references.length > def.assignments)) return false;
+    if (def.fixed instanceof AST_Defun) {
+        return value instanceof AST_Node && def.fixed.parent_scope === scope;
+    }
+    return def.orig.every((sym) => {
+        return !(sym instanceof AST_SymbolConst
+            || sym instanceof AST_SymbolDefun
+            || sym instanceof AST_SymbolLambda);
+    });
+}
+
+function ref_once(tw, compressor, def) {
+    return compressor.option("unused")
+        && !def.scope.pinned()
+        && def.references.length - def.recursive_refs == 1
+        && tw.loop_ids.get(def.id) === tw.in_loop;
+}
+
+function is_immutable(value) {
+    if (!value) return false;
+    return value.is_constant()
+        || value instanceof AST_Lambda
+        || value instanceof AST_This;
+}
+
+// A definition "escapes" when its value can leave the point of use.
+// Example: `a = b || c`
+// In this example, "b" and "c" are escaping, because they're going into "a"
+//
+// def.escaped is != 0 when it escapes.
+//
+// When greater than 1, it means that N chained properties will be read off
+// of that def before an escape occurs. This is useful for evaluating
+// property accesses, where you need to know when to stop.
+function mark_escaped(tw, d, scope, node, value, level = 0, depth = 1) {
+    var parent = tw.parent(level);
+    if (value) {
+        if (value.is_constant()) return;
+        if (value instanceof AST_ClassExpression) return;
+    }
+
+    if (
+        parent instanceof AST_Assign && (parent.operator === "=" || parent.logical) && node === parent.right
+        || parent instanceof AST_Call && (node !== parent.expression || parent instanceof AST_New)
+        || parent instanceof AST_Exit && node === parent.value && node.scope !== d.scope
+        || parent instanceof AST_VarDefLike && node === parent.value
+        || parent instanceof AST_Yield && node === parent.value && node.scope !== d.scope
+    ) {
+        if (depth > 1 && !(value && value.is_constant_expression(scope))) depth = 1;
+        if (!d.escaped || d.escaped > depth) d.escaped = depth;
+        return;
+    } else if (
+        parent instanceof AST_Array
+        || parent instanceof AST_Await
+        || parent instanceof AST_Binary && lazy_op.has(parent.operator)
+        || parent instanceof AST_Conditional && node !== parent.condition
+        || parent instanceof AST_Expansion
+        || parent instanceof AST_Sequence && node === parent.tail_node()
+    ) {
+        mark_escaped(tw, d, scope, parent, parent, level + 1, depth);
+    } else if (parent instanceof AST_ObjectKeyVal && node === parent.value) {
+        var obj = tw.parent(level + 1);
+
+        mark_escaped(tw, d, scope, obj, obj, level + 2, depth);
+    } else if (parent instanceof AST_PropAccess && node === parent.expression) {
+        value = read_property(value, parent.property);
+
+        mark_escaped(tw, d, scope, parent, value, level + 1, depth + 1);
+        if (value) return;
+    }
+
+    if (level > 0) return;
+    if (parent instanceof AST_Sequence && node !== parent.tail_node()) return;
+    if (parent instanceof AST_SimpleStatement) return;
+
+    d.direct_access = true;
+}
+
+const suppress = node => walk(node, node => {
+    if (!(node instanceof AST_Symbol)) return;
+    var d = node.definition();
+    if (!d) return;
+    if (node instanceof AST_SymbolRef) d.references.push(node);
+    d.fixed = false;
+});
+
+def_reduce_vars(AST_Accessor, function(tw, descend, compressor) {
+    push(tw);
+    reset_variables(tw, compressor, this);
+    descend();
+    pop(tw);
+    return true;
+});
+
+def_reduce_vars(AST_Assign, function(tw, descend, compressor) {
+    var node = this;
+    if (node.left instanceof AST_Destructuring) {
+        suppress(node.left);
+        return;
+    }
+
+    const finish_walk = () => {
+        if (node.logical) {
+            node.left.walk(tw);
+
+            push(tw);
+            node.right.walk(tw);
+            pop(tw);
+
+            return true;
+        }
+    };
+
+    var sym = node.left;
+    if (!(sym instanceof AST_SymbolRef)) return finish_walk();
+
+    var def = sym.definition();
+    var safe = safe_to_assign(tw, def, sym.scope, node.right);
+    def.assignments++;
+    if (!safe) return finish_walk();
+
+    var fixed = def.fixed;
+    if (!fixed && node.operator != "=" && !node.logical) return finish_walk();
+
+    var eq = node.operator == "=";
+    var value = eq ? node.right : node;
+    if (is_modified(compressor, tw, node, value, 0)) return finish_walk();
+
+    def.references.push(sym);
+
+    if (!node.logical) {
+        if (!eq) def.chained = true;
+
+        def.fixed = eq ? function() {
+            return node.right;
+        } : function() {
+            return make_node(AST_Binary, node, {
+                operator: node.operator.slice(0, -1),
+                left: fixed instanceof AST_Node ? fixed : fixed(),
+                right: node.right
+            });
+        };
+    }
+
+    if (node.logical) {
+        mark(tw, def, false);
+        push(tw);
+        node.right.walk(tw);
+        pop(tw);
+        return true;
+    }
+
+    mark(tw, def, false);
+    node.right.walk(tw);
+    mark(tw, def, true);
+
+    mark_escaped(tw, def, sym.scope, node, value, 0, 1);
+
+    return true;
+});
+
+def_reduce_vars(AST_Binary, function(tw) {
+    if (!lazy_op.has(this.operator)) return;
+    this.left.walk(tw);
+    push(tw);
+    this.right.walk(tw);
+    pop(tw);
+    return true;
+});
+
+def_reduce_vars(AST_Block, function(tw, descend, compressor) {
+    reset_block_variables(compressor, this);
+});
+
+def_reduce_vars(AST_Case, function(tw) {
+    push(tw);
+    this.expression.walk(tw);
+    pop(tw);
+    push(tw);
+    walk_body(this, tw);
+    pop(tw);
+    return true;
+});
+
+def_reduce_vars(AST_Class, function(tw, descend) {
+    clear_flag(this, INLINED);
+    push(tw);
+    descend();
+    pop(tw);
+    return true;
+});
+
+def_reduce_vars(AST_ClassStaticBlock, function(tw, descend, compressor) {
+    reset_block_variables(compressor, this);
+});
+
+def_reduce_vars(AST_Conditional, function(tw) {
+    this.condition.walk(tw);
+    push(tw);
+    this.consequent.walk(tw);
+    pop(tw);
+    push(tw);
+    this.alternative.walk(tw);
+    pop(tw);
+    return true;
+});
+
+def_reduce_vars(AST_Chain, function(tw, descend) {
+    // Chains' conditions apply left-to-right, cumulatively.
+    // If we walk normally we don't go in that order because we would pop before pushing again
+    // Solution: AST_PropAccess and AST_Call push when they are optional, and never pop.
+    // Then we pop everything when they are done being walked.
+    const safe_ids = tw.safe_ids;
+
+    descend();
+
+    // Unroll back to start
+    tw.safe_ids = safe_ids;
+    return true;
+});
+
+def_reduce_vars(AST_Call, function (tw) {
+    this.expression.walk(tw);
+
+    if (this.optional) {
+        // Never pop -- it's popped at AST_Chain above
+        push(tw);
+    }
+
+    for (const arg of this.args) arg.walk(tw);
+
+    return true;
+});
+
+def_reduce_vars(AST_PropAccess, function (tw) {
+    if (!this.optional) return;
+
+    this.expression.walk(tw);
+
+    // Never pop -- it's popped at AST_Chain above
+    push(tw);
+
+    if (this.property instanceof AST_Node) this.property.walk(tw);
+
+    return true;
+});
+
+def_reduce_vars(AST_Default, function(tw, descend) {
+    push(tw);
+    descend();
+    pop(tw);
+    return true;
+});
+
+function mark_lambda(tw, descend, compressor) {
+    clear_flag(this, INLINED);
+    push(tw);
+    reset_variables(tw, compressor, this);
+
+    var iife;
+    if (!this.name
+        && !this.uses_arguments
+        && !this.pinned()
+        && (iife = tw.parent()) instanceof AST_Call
+        && iife.expression === this
+        && !iife.args.some(arg => arg instanceof AST_Expansion)
+        && this.argnames.every(arg_name => arg_name instanceof AST_Symbol)
+    ) {
+        // Virtually turn IIFE parameters into variable definitions:
+        //   (function(a,b) {...})(c,d) => (function() {var a=c,b=d; ...})()
+        // So existing transformation rules can work on them.
+        this.argnames.forEach((arg, i) => {
+            if (!arg.definition) return;
+            var d = arg.definition();
+            // Avoid setting fixed when there's more than one origin for a variable value
+            if (d.orig.length > 1) return;
+            if (d.fixed === undefined && (!this.uses_arguments || tw.has_directive("use strict"))) {
+                d.fixed = function() {
+                    return iife.args[i] || make_void_0(iife);
+                };
+                tw.loop_ids.set(d.id, tw.in_loop);
+                mark(tw, d, true);
+            } else {
+                d.fixed = false;
+            }
+        });
+    }
+
+    descend();
+    pop(tw);
+
+    handle_defined_after_hoist(this);
+
+    return true;
+}
+
+/**
+ * It's possible for a hoisted function to use something that's not defined yet. Example:
+ *
+ * hoisted();
+ * var defined_after = true;
+ * function hoisted() {
+ *   // use defined_after
+ * }
+ *
+ * Or even indirectly:
+ *
+ * B();
+ * var defined_after = true;
+ * function A() {
+ *   // use defined_after
+ * }
+ * function B() {
+ *   A();
+ * }
+ *
+ * Access a variable before declaration will either throw a ReferenceError
+ * (if the variable is declared with `let` or `const`),
+ * or get an `undefined` (if the variable is declared with `var`).
+ *
+ * If the variable is inlined into the function, the behavior will change.
+ *
+ * This function is called on the parent to disallow inlining of such variables,
+ */
+function handle_defined_after_hoist(parent) {
+    const defuns = [];
+    walk(parent, node => {
+        if (node === parent) return;
+        if (node instanceof AST_Defun) {
+            defuns.push(node);
+            return true;
+        }
+        if (
+            node instanceof AST_Scope
+            || node instanceof AST_SimpleStatement
+        ) return true;
+    });
+
+    // `defun` id to array of `defun` it uses
+    const defun_dependencies_map = new Map();
+    // `defun` id to array of enclosing `def` that are used by the function
+    const dependencies_map = new Map();
+    // all symbol ids that will be tracked for read/write
+    const symbols_of_interest = new Set();
+    const defuns_of_interest = new Set();
+
+    for (const defun of defuns) {
+        const fname_def = defun.name.definition();
+        const enclosing_defs = [];
+
+        for (const def of defun.enclosed) {
+            if (
+                def.fixed === false
+                || def === fname_def
+                || def.scope.get_defun_scope() !== parent
+            ) {
+                continue;
+            }
+
+            symbols_of_interest.add(def.id);
+
+            // found a reference to another function
+            if (
+                def.assignments === 0
+                && def.orig.length === 1
+                && def.orig[0] instanceof AST_SymbolDefun
+            ) {
+                defuns_of_interest.add(def.id);
+                symbols_of_interest.add(def.id);
+
+                defuns_of_interest.add(fname_def.id);
+                symbols_of_interest.add(fname_def.id);
+
+                if (!defun_dependencies_map.has(fname_def.id)) {
+                    defun_dependencies_map.set(fname_def.id, []);
+                }
+                defun_dependencies_map.get(fname_def.id).push(def.id);
+
+                continue;
+            }
+
+            enclosing_defs.push(def);
+        }
+
+        if (enclosing_defs.length) {
+            dependencies_map.set(fname_def.id, enclosing_defs);
+            defuns_of_interest.add(fname_def.id);
+            symbols_of_interest.add(fname_def.id);
+        }
+    }
+
+    // No defuns use outside constants
+    if (!dependencies_map.size) {
+        return;
+    }
+
+    // Increment to count "symbols of interest" (defuns or defs) that we found.
+    // These are tracked in AST order so we can check which is after which.
+    let symbol_index = 1;
+    // Map a defun ID to its first read (a `symbol_index`)
+    const defun_first_read_map = new Map();
+    // Map a symbol ID to its last write (a `symbol_index`)
+    const symbol_last_write_map = new Map();
+
+    walk_parent(parent, (node, walk_info) => {
+        if (node instanceof AST_Symbol && node.thedef) {
+            const id = node.definition().id;
+
+            symbol_index++;
+
+            // Track last-writes to symbols
+            if (symbols_of_interest.has(id)) {
+                if (node instanceof AST_SymbolDeclaration || is_lhs(node, walk_info.parent())) {
+                    symbol_last_write_map.set(id, symbol_index);
+                }
+            }
+
+            // Track first-reads of defuns (refined later)
+            if (defuns_of_interest.has(id)) {
+                if (!defun_first_read_map.has(id) && !is_recursive_ref(walk_info, id)) {
+                    defun_first_read_map.set(id, symbol_index);
+                }
+            }
+        }
+    });
+
+    // Refine `defun_first_read_map` to be as high as possible
+    for (const [defun, defun_first_read] of defun_first_read_map) {
+        // Update all dependencies of `defun`
+        const queue = new Set(defun_dependencies_map.get(defun));
+        for (const enclosed_defun of queue) {
+            let enclosed_defun_first_read = defun_first_read_map.get(enclosed_defun);
+            if (enclosed_defun_first_read != null && enclosed_defun_first_read < defun_first_read) {
+                continue;
+            }
+
+            defun_first_read_map.set(enclosed_defun, defun_first_read);
+
+            for (const enclosed_enclosed_defun of defun_dependencies_map.get(enclosed_defun) || []) {
+                queue.add(enclosed_enclosed_defun);
+            }
+        }
+    }
+
+    // ensure write-then-read order, otherwise clear `fixed`
+    // This is safe because last-writes (found_symbol_writes) are assumed to be as late as possible, and first-reads (defun_first_read_map) are assumed to be as early as possible.
+    for (const [defun, defs] of dependencies_map) {
+        const defun_first_read = defun_first_read_map.get(defun);
+        if (defun_first_read === undefined) {
+            continue;
+        }
+
+        for (const def of defs) {
+            if (def.fixed === false) {
+                continue;
+            }
+
+            let def_last_write = symbol_last_write_map.get(def.id) || 0;
+
+            if (defun_first_read < def_last_write) {
+                def.fixed = false;
+            }
+        }
+    }
+}
+
+def_reduce_vars(AST_Lambda, mark_lambda);
+
+def_reduce_vars(AST_Do, function(tw, descend, compressor) {
+    reset_block_variables(compressor, this);
+    const saved_loop = tw.in_loop;
+    tw.in_loop = this;
+    push(tw);
+    this.body.walk(tw);
+    if (has_break_or_continue(this)) {
+        pop(tw);
+        push(tw);
+    }
+    this.condition.walk(tw);
+    pop(tw);
+    tw.in_loop = saved_loop;
+    return true;
+});
+
+def_reduce_vars(AST_For, function(tw, descend, compressor) {
+    reset_block_variables(compressor, this);
+    if (this.init) this.init.walk(tw);
+    const saved_loop = tw.in_loop;
+    tw.in_loop = this;
+    push(tw);
+    if (this.condition) this.condition.walk(tw);
+    this.body.walk(tw);
+    if (this.step) {
+        if (has_break_or_continue(this)) {
+            pop(tw);
+            push(tw);
+        }
+        this.step.walk(tw);
+    }
+    pop(tw);
+    tw.in_loop = saved_loop;
+    return true;
+});
+
+def_reduce_vars(AST_ForIn, function(tw, descend, compressor) {
+    reset_block_variables(compressor, this);
+    suppress(this.init);
+    this.object.walk(tw);
+    const saved_loop = tw.in_loop;
+    tw.in_loop = this;
+    push(tw);
+    this.body.walk(tw);
+    pop(tw);
+    tw.in_loop = saved_loop;
+    return true;
+});
+
+def_reduce_vars(AST_If, function(tw) {
+    this.condition.walk(tw);
+    push(tw);
+    this.body.walk(tw);
+    pop(tw);
+    if (this.alternative) {
+        push(tw);
+        this.alternative.walk(tw);
+        pop(tw);
+    }
+    return true;
+});
+
+def_reduce_vars(AST_LabeledStatement, function(tw) {
+    push(tw);
+    this.body.walk(tw);
+    pop(tw);
+    return true;
+});
+
+def_reduce_vars(AST_SymbolCatch, function() {
+    this.definition().fixed = false;
+});
+
+def_reduce_vars(AST_SymbolRef, function(tw, descend, compressor) {
+    var d = this.definition();
+    d.references.push(this);
+    if (d.references.length == 1
+        && !d.fixed
+        && d.orig[0] instanceof AST_SymbolDefun) {
+        tw.loop_ids.set(d.id, tw.in_loop);
+    }
+    var fixed_value;
+    if (d.fixed === undefined || !safe_to_read(tw, d)) {
+        d.fixed = false;
+    } else if (d.fixed) {
+        fixed_value = this.fixed_value();
+        if (
+            fixed_value instanceof AST_Lambda
+            && is_recursive_ref(tw, d)
+        ) {
+            d.recursive_refs++;
+        } else if (fixed_value
+            && !compressor.exposed(d)
+            && ref_once(tw, compressor, d)
+        ) {
+            d.single_use =
+                fixed_value instanceof AST_Lambda && !fixed_value.pinned()
+                || fixed_value instanceof AST_Class
+                || d.scope === this.scope && fixed_value.is_constant_expression();
+        } else {
+            d.single_use = false;
+        }
+        if (is_modified(compressor, tw, this, fixed_value, 0, is_immutable(fixed_value))) {
+            if (d.single_use) {
+                d.single_use = "m";
+            } else {
+                d.fixed = false;
+            }
+        }
+    }
+    mark_escaped(tw, d, this.scope, this, fixed_value, 0, 1);
+});
+
+def_reduce_vars(AST_Toplevel, function(tw, descend, compressor) {
+    this.globals.forEach(function(def) {
+        reset_def(compressor, def);
+    });
+    reset_variables(tw, compressor, this);
+    descend();
+    handle_defined_after_hoist(this);
+    return true;
+});
+
+def_reduce_vars(AST_Try, function(tw, descend, compressor) {
+    reset_block_variables(compressor, this);
+    push(tw);
+    this.body.walk(tw);
+    pop(tw);
+    if (this.bcatch) {
+        push(tw);
+        this.bcatch.walk(tw);
+        pop(tw);
+    }
+    if (this.bfinally) this.bfinally.walk(tw);
+    return true;
+});
+
+def_reduce_vars(AST_Unary, function(tw) {
+    var node = this;
+    if (node.operator !== "++" && node.operator !== "--") return;
+    var exp = node.expression;
+    if (!(exp instanceof AST_SymbolRef)) return;
+    var def = exp.definition();
+    var safe = safe_to_assign(tw, def, exp.scope, true);
+    def.assignments++;
+    if (!safe) return;
+    var fixed = def.fixed;
+    if (!fixed) return;
+    def.references.push(exp);
+    def.chained = true;
+    def.fixed = function() {
+        return make_node(AST_Binary, node, {
+            operator: node.operator.slice(0, -1),
+            left: make_node(AST_UnaryPrefix, node, {
+                operator: "+",
+                expression: fixed instanceof AST_Node ? fixed : fixed()
+            }),
+            right: make_node(AST_Number, node, {
+                value: 1
+            })
+        });
+    };
+    mark(tw, def, true);
+    return true;
+});
+
+def_reduce_vars(AST_VarDef, function(tw, descend) {
+    var node = this;
+    if (node.name instanceof AST_Destructuring) {
+        suppress(node.name);
+        return;
+    }
+    var d = node.name.definition();
+    if (node.value) {
+        if (safe_to_assign(tw, d, node.name.scope, node.value)) {
+            d.fixed = function() {
+                return node.value;
+            };
+            tw.loop_ids.set(d.id, tw.in_loop);
+            mark(tw, d, false);
+            descend();
+            mark(tw, d, true);
+            return true;
+        } else {
+            d.fixed = false;
+        }
+    }
+});
+
+def_reduce_vars(AST_UsingDef, function() {
+    suppress(this.name);
+});
+
+def_reduce_vars(AST_While, function(tw, descend, compressor) {
+    reset_block_variables(compressor, this);
+    const saved_loop = tw.in_loop;
+    tw.in_loop = this;
+    push(tw);
+    descend();
+    pop(tw);
+    tw.in_loop = saved_loop;
+    return true;
+});
Index: frontend/node_modules/terser/lib/compress/tighten-body.js
===================================================================
--- frontend/node_modules/terser/lib/compress/tighten-body.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/compress/tighten-body.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,1531 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+import {
+    AST_Array,
+    AST_Arrow,
+    AST_Assign,
+    AST_Await,
+    AST_Binary,
+    AST_Block,
+    AST_BlockStatement,
+    AST_Break,
+    AST_Call,
+    AST_Case,
+    AST_Chain,
+    AST_Class,
+    AST_Conditional,
+    AST_Constant,
+    AST_Continue,
+    AST_Debugger,
+    AST_Default,
+    AST_Definitions,
+    AST_DefinitionsLike,
+    AST_Defun,
+    AST_Destructuring,
+    AST_Directive,
+    AST_Dot,
+    AST_DWLoop,
+    AST_EmptyStatement,
+    AST_Exit,
+    AST_Expansion,
+    AST_Export,
+    AST_For,
+    AST_ForIn,
+    AST_If,
+    AST_Import,
+    AST_IterationStatement,
+    AST_Lambda,
+    AST_LoopControl,
+    AST_Node,
+    AST_Number,
+    AST_Object,
+    AST_ObjectKeyVal,
+    AST_ObjectProperty,
+    AST_PropAccess,
+    AST_RegExp,
+    AST_Return,
+    AST_Scope,
+    AST_Sequence,
+    AST_SimpleStatement,
+    AST_Sub,
+    AST_Switch,
+    AST_Symbol,
+    AST_SymbolConst,
+    AST_SymbolDeclaration,
+    AST_SymbolDefun,
+    AST_SymbolFunarg,
+    AST_SymbolLambda,
+    AST_SymbolLet,
+    AST_SymbolRef,
+    AST_SymbolUsing,
+    AST_SymbolVar,
+    AST_This,
+    AST_Try,
+    AST_TryBlock,
+    AST_Unary,
+    AST_UnaryPostfix,
+    AST_UnaryPrefix,
+    AST_Using,
+    AST_Var,
+    AST_VarDef,
+    AST_With,
+    AST_Yield,
+
+    TreeTransformer,
+    TreeWalker,
+    walk,
+    walk_abort,
+
+    _NOINLINE,
+} from "../ast.js";
+import {
+    make_node,
+    make_void_0,
+    MAP,
+    member,
+    remove,
+    has_annotation
+} from "../utils/index.js";
+
+import { pure_prop_access_globals } from "./native-objects.js";
+import {
+    lazy_op,
+    unary_side_effects,
+    is_modified,
+    is_lhs,
+    aborts
+} from "./inference.js";
+import { WRITE_ONLY, clear_flag } from "./compressor-flags.js";
+import {
+    make_sequence,
+    merge_sequence,
+    maintain_this_binding,
+    is_func_expr,
+    is_identifier_atom,
+    is_ref_of,
+    can_be_evicted_from_block,
+    as_statement_array,
+} from "./common.js";
+
+function loop_body(x) {
+    if (x instanceof AST_IterationStatement) {
+        return x.body instanceof AST_BlockStatement ? x.body : x;
+    }
+    return x;
+}
+
+function is_lhs_read_only(lhs) {
+    if (lhs instanceof AST_This) return true;
+    if (lhs instanceof AST_SymbolRef) return lhs.definition().orig[0] instanceof AST_SymbolLambda;
+    if (lhs instanceof AST_PropAccess) {
+        lhs = lhs.expression;
+        if (lhs instanceof AST_SymbolRef) {
+            if (lhs.is_immutable()) return false;
+            lhs = lhs.fixed_value();
+        }
+        if (!lhs) return true;
+        if (lhs instanceof AST_RegExp) return false;
+        if (lhs instanceof AST_Constant) return true;
+        return is_lhs_read_only(lhs);
+    }
+    return false;
+}
+
+/** var a = 1 --> var a*/
+function remove_initializers(var_statement) {
+    var decls = [];
+    var_statement.definitions.forEach(function(def) {
+        if (def.name instanceof AST_SymbolDeclaration) {
+            def.value = null;
+            decls.push(def);
+        } else {
+            def.declarations_as_names().forEach(name => {
+                decls.push(make_node(AST_VarDef, def, {
+                    name,
+                    value: null
+                }));
+            });
+        }
+    });
+    return decls.length ? make_node(AST_Var, var_statement, { definitions: decls }) : null;
+}
+
+/** Called on code which won't be executed but has an effect outside of itself: `var`, `function` statements, `export`, `import`. */
+export function extract_from_unreachable_code(compressor, stat, target) {
+    walk(stat, node => {
+        if (node instanceof AST_Var) {
+            const no_initializers = remove_initializers(node);
+            if (no_initializers) target.push(no_initializers);
+            return true;
+        }
+        if (
+            node instanceof AST_Defun
+            && (node === stat || !compressor.has_directive("use strict"))
+        ) {
+            target.push(node === stat ? node : make_node(AST_Var, node, {
+                definitions: [
+                    make_node(AST_VarDef, node, {
+                        name: make_node(AST_SymbolVar, node.name, node.name),
+                        value: null
+                    })
+                ]
+            }));
+            return true;
+        }
+        if (node instanceof AST_Export || node instanceof AST_Import) {
+            target.push(node);
+            return true;
+        }
+        if (node instanceof AST_Scope || node instanceof AST_Class) {
+            // Do not go into nested scopes
+            return true;
+        }
+    });
+}
+
+/** Tighten a bunch of statements together, and perform statement-level optimization. */
+export function tighten_body(statements, compressor) {
+    const nearest_scope = compressor.find_scope();
+    const defun_scope = nearest_scope.get_defun_scope();
+    const { in_loop, in_try } = find_loop_scope_try();
+
+    var CHANGED, max_iter = 10;
+    do {
+        CHANGED = false;
+        eliminate_spurious_blocks(statements);
+        if (compressor.option("dead_code")) {
+            eliminate_dead_code(statements, compressor);
+        }
+        if (compressor.option("if_return")) {
+            handle_if_return(statements, compressor);
+        }
+        if (compressor.sequences_limit > 0) {
+            sequencesize(statements, compressor);
+            sequencesize_2(statements, compressor);
+        }
+        if (compressor.option("join_vars")) {
+            join_consecutive_vars(statements);
+        }
+        if (compressor.option("collapse_vars")) {
+            collapse(statements, compressor);
+        }
+    } while (CHANGED && max_iter-- > 0);
+
+    function find_loop_scope_try() {
+        var node = compressor.self(), level = 0, in_loop = false, in_try = false;
+        do {
+            if (node instanceof AST_IterationStatement) {
+                in_loop = true;
+            } else if (node instanceof AST_Scope) {
+                break;
+            } else if (node instanceof AST_TryBlock) {
+                in_try = true;
+            }
+        } while (node = compressor.parent(level++));
+
+        return { in_loop, in_try };
+    }
+
+    // Search from right to left for assignment-like expressions:
+    // - `var a = x;`
+    // - `a = x;`
+    // - `++a`
+    // For each candidate, scan from left to right for first usage, then try
+    // to fold assignment into the site for compression.
+    // Will not attempt to collapse assignments into or past code blocks
+    // which are not sequentially executed, e.g. loops and conditionals.
+    function collapse(statements, compressor) {
+        if (nearest_scope.pinned() || defun_scope.pinned())
+            return statements;
+        var args;
+        var candidates = [];
+        var stat_index = statements.length;
+        var scanner = new TreeTransformer(function (node) {
+            if (abort)
+                return node;
+            // Skip nodes before `candidate` as quickly as possible
+            if (!hit) {
+                if (node !== hit_stack[hit_index])
+                    return node;
+                hit_index++;
+                if (hit_index < hit_stack.length)
+                    return handle_custom_scan_order(node);
+                hit = true;
+                stop_after = find_stop(node, 0);
+                if (stop_after === node)
+                    abort = true;
+                return node;
+            }
+            // Stop immediately if these node types are encountered
+            var parent = scanner.parent();
+            if (node instanceof AST_Assign
+                    && (node.logical || node.operator != "=" && lhs.equivalent_to(node.left))
+                || node instanceof AST_Await
+                || node instanceof AST_Using
+                || node instanceof AST_Call && lhs instanceof AST_PropAccess && lhs.equivalent_to(node.expression)
+                ||
+                    (node instanceof AST_Call || node instanceof AST_PropAccess)
+                    && node.optional
+                || node instanceof AST_Debugger
+                || node instanceof AST_Destructuring
+                || node instanceof AST_Expansion
+                    && node.expression instanceof AST_Symbol
+                    && (
+                        node.expression instanceof AST_This
+                        || node.expression.definition().references.length > 1
+                    )
+                || node instanceof AST_IterationStatement && !(node instanceof AST_For)
+                || node instanceof AST_LoopControl
+                || node instanceof AST_Try
+                || node instanceof AST_With
+                || node instanceof AST_Yield
+                || node instanceof AST_Export
+                || node instanceof AST_Class
+                || parent instanceof AST_For && node !== parent.init
+                || !replace_all
+                    && (
+                        node instanceof AST_SymbolRef
+                        && !node.is_declared(compressor)
+                        && !pure_prop_access_globals.has(node)
+                    )
+                || node instanceof AST_SymbolRef
+                    && parent instanceof AST_Call
+                    && has_annotation(parent, _NOINLINE)
+                || node instanceof AST_ObjectProperty && node.key instanceof AST_Node
+            ) {
+                abort = true;
+                return node;
+            }
+            // Stop only if candidate is found within conditional branches
+            if (!stop_if_hit && (!lhs_local || !replace_all)
+                && (parent instanceof AST_Binary && lazy_op.has(parent.operator) && parent.left !== node
+                    || parent instanceof AST_Conditional && parent.condition !== node
+                    || parent instanceof AST_If && parent.condition !== node)) {
+                stop_if_hit = parent;
+            }
+            // Replace variable with assignment when found
+            if (
+                can_replace
+                && !(node instanceof AST_SymbolDeclaration)
+                && lhs.equivalent_to(node)
+                && !shadows(scanner.find_scope() || nearest_scope, lvalues)
+            ) {
+                if (stop_if_hit) {
+                    abort = true;
+                    return node;
+                }
+                if (is_lhs(node, parent)) {
+                    if (value_def)
+                        replaced++;
+                    return node;
+                } else {
+                    replaced++;
+                    if (value_def && candidate instanceof AST_VarDef)
+                        return node;
+                }
+                CHANGED = abort = true;
+                if (candidate instanceof AST_UnaryPostfix) {
+                    return make_node(AST_UnaryPrefix, candidate, candidate);
+                }
+                if (candidate instanceof AST_VarDef) {
+                    var def = candidate.name.definition();
+                    var value = candidate.value;
+                    if (def.references.length - def.replaced == 1 && !compressor.exposed(def)) {
+                        def.replaced++;
+                        if (funarg && is_identifier_atom(value)) {
+                            return value.transform(compressor);
+                        } else {
+                            return maintain_this_binding(parent, node, value);
+                        }
+                    }
+                    return make_node(AST_Assign, candidate, {
+                        operator: "=",
+                        logical: false,
+                        left: make_node(AST_SymbolRef, candidate.name, candidate.name),
+                        right: value
+                    });
+                }
+                clear_flag(candidate, WRITE_ONLY);
+                return candidate;
+            }
+            // These node types have child nodes that execute sequentially,
+            // but are otherwise not safe to scan into or beyond them.
+            var sym;
+            if (node instanceof AST_Call
+                || node instanceof AST_Exit
+                && (side_effects || lhs instanceof AST_PropAccess || may_modify(lhs))
+                || node instanceof AST_PropAccess
+                && (side_effects || node.expression.may_throw_on_access(compressor))
+                || node instanceof AST_SymbolRef
+                && ((lvalues.has(node.name) && lvalues.get(node.name).modified) || side_effects && may_modify(node))
+                || node instanceof AST_VarDef && node.value
+                && (lvalues.has(node.name.name) || side_effects && may_modify(node.name))
+                || node instanceof AST_Using
+                || (sym = is_lhs(node.left, node))
+                && (sym instanceof AST_PropAccess || lvalues.has(sym.name))
+                || may_throw
+                && (in_try ? node.has_side_effects(compressor) : side_effects_external(node))) {
+                stop_after = node;
+                if (node instanceof AST_Scope)
+                    abort = true;
+            }
+            return handle_custom_scan_order(node);
+        }, function (node) {
+            if (abort)
+                return;
+            if (stop_after === node)
+                abort = true;
+            if (stop_if_hit === node)
+                stop_if_hit = null;
+        });
+
+        var multi_replacer = new TreeTransformer(function (node) {
+            if (abort)
+                return node;
+            // Skip nodes before `candidate` as quickly as possible
+            if (!hit) {
+                if (node !== hit_stack[hit_index])
+                    return node;
+                hit_index++;
+                if (hit_index < hit_stack.length)
+                    return;
+                hit = true;
+                return node;
+            }
+            // Replace variable when found
+            if (node instanceof AST_SymbolRef
+                && node.name == def.name) {
+                if (!--replaced)
+                    abort = true;
+                if (is_lhs(node, multi_replacer.parent()))
+                    return node;
+                def.replaced++;
+                value_def.replaced--;
+                return candidate.value;
+            }
+            // Skip (non-executed) functions and (leading) default case in switch statements
+            if (node instanceof AST_Default || node instanceof AST_Scope)
+                return node;
+        });
+
+        while (--stat_index >= 0) {
+            // Treat parameters as collapsible in IIFE, i.e.
+            //   function(a, b){ ... }(x());
+            // would be translated into equivalent assignments:
+            //   var a = x(), b = undefined;
+            if (stat_index == 0 && compressor.option("unused"))
+                extract_args();
+            // Find collapsible assignments
+            var hit_stack = [];
+            extract_candidates(statements[stat_index]);
+            while (candidates.length > 0) {
+                hit_stack = candidates.pop();
+                var hit_index = 0;
+                var candidate = hit_stack[hit_stack.length - 1];
+                var value_def = null;
+                var stop_after = null;
+                var stop_if_hit = null;
+                var lhs = get_lhs(candidate);
+                if (!lhs || is_lhs_read_only(lhs) || lhs.has_side_effects(compressor))
+                    continue;
+                // Locate symbols which may execute code outside of scanning range
+                var lvalues = get_lvalues(candidate);
+                var lhs_local = is_lhs_local(lhs);
+                if (lhs instanceof AST_SymbolRef) {
+                    lvalues.set(lhs.name, { def: lhs.definition(), modified: false });
+                }
+                var side_effects = value_has_side_effects(candidate);
+                var replace_all = replace_all_symbols();
+                var may_throw = candidate.may_throw(compressor);
+                var funarg = candidate.name instanceof AST_SymbolFunarg;
+                var hit = funarg;
+                var abort = false, replaced = 0, can_replace = !args || !hit;
+                if (!can_replace) {
+                    for (
+                        let j = compressor.self().argnames.lastIndexOf(candidate.name) + 1;
+                        !abort && j < args.length;
+                        j++
+                    ) {
+                        args[j].transform(scanner);
+                    }
+                    can_replace = true;
+                }
+                for (var i = stat_index; !abort && i < statements.length; i++) {
+                    statements[i].transform(scanner);
+                }
+                if (value_def) {
+                    var def = candidate.name.definition();
+                    if (abort && def.references.length - def.replaced > replaced)
+                        replaced = false;
+                    else {
+                        abort = false;
+                        hit_index = 0;
+                        hit = funarg;
+                        for (var i = stat_index; !abort && i < statements.length; i++) {
+                            statements[i].transform(multi_replacer);
+                        }
+                        value_def.single_use = false;
+                    }
+                }
+                if (replaced && !remove_candidate(candidate))
+                    statements.splice(stat_index, 1);
+            }
+        }
+
+        function handle_custom_scan_order(node) {
+            // Skip (non-executed) functions
+            if (node instanceof AST_Scope)
+                return node;
+
+            // Scan case expressions first in a switch statement
+            if (node instanceof AST_Switch) {
+                node.expression = node.expression.transform(scanner);
+                for (var i = 0, len = node.body.length; !abort && i < len; i++) {
+                    var branch = node.body[i];
+                    if (branch instanceof AST_Case) {
+                        if (!hit) {
+                            if (branch !== hit_stack[hit_index])
+                                continue;
+                            hit_index++;
+                        }
+                        branch.expression = branch.expression.transform(scanner);
+                        if (!replace_all)
+                            break;
+                    }
+                }
+                abort = true;
+                return node;
+            }
+        }
+
+        function redefined_within_scope(def, scope) {
+            if (def.global)
+                return false;
+            let cur_scope = def.scope;
+            while (cur_scope && cur_scope !== scope) {
+                if (cur_scope.variables.has(def.name)) {
+                    return true;
+                }
+                cur_scope = cur_scope.parent_scope;
+            }
+            return false;
+        }
+
+        function has_overlapping_symbol(fn, arg, fn_strict) {
+            var found = false, scan_this = !(fn instanceof AST_Arrow);
+            arg.walk(new TreeWalker(function (node, descend) {
+                if (found)
+                    return true;
+                if (node instanceof AST_SymbolRef && (fn.variables.has(node.name) || redefined_within_scope(node.definition(), fn))) {
+                    var s = node.definition().scope;
+                    if (s !== defun_scope)
+                        while (s = s.parent_scope) {
+                            if (s === defun_scope)
+                                return true;
+                        }
+                    return found = true;
+                }
+                if ((fn_strict || scan_this) && node instanceof AST_This) {
+                    return found = true;
+                }
+                if (node instanceof AST_Scope && !(node instanceof AST_Arrow)) {
+                    var prev = scan_this;
+                    scan_this = false;
+                    descend();
+                    scan_this = prev;
+                    return true;
+                }
+            }));
+            return found;
+        }
+
+        function arg_is_injectable(arg) {
+            if (arg instanceof AST_Expansion) return false;
+            const contains_await = walk(arg, (node) => {
+                if (node instanceof AST_Await) return walk_abort;
+            });
+            if (contains_await) return false;
+            return true;
+        }
+        function extract_args() {
+            var iife, fn = compressor.self();
+            if (is_func_expr(fn)
+                && !fn.name
+                && !fn.uses_arguments
+                && !fn.pinned()
+                && (iife = compressor.parent()) instanceof AST_Call
+                && iife.expression === fn
+                && iife.args.every(arg_is_injectable)
+            ) {
+                var fn_strict = compressor.has_directive("use strict");
+                if (fn_strict && !member(fn_strict, fn.body))
+                    fn_strict = false;
+                var len = fn.argnames.length;
+                args = iife.args.slice(len);
+                var names = new Set();
+                for (var i = len; --i >= 0;) {
+                    var sym = fn.argnames[i];
+                    var arg = iife.args[i];
+                    // The following two line fix is a duplicate of the fix at
+                    // https://github.com/terser/terser/commit/011d3eb08cefe6922c7d1bdfa113fc4aeaca1b75
+                    // This might mean that these two pieces of code (one here in collapse_vars and another in reduce_vars
+                    // Might be doing the exact same thing.
+                    const def = sym.definition && sym.definition();
+                    const is_reassigned = def && def.orig.length > 1;
+                    if (is_reassigned)
+                        continue;
+                    args.unshift(make_node(AST_VarDef, sym, {
+                        name: sym,
+                        value: arg
+                    }));
+                    if (names.has(sym.name))
+                        continue;
+                    names.add(sym.name);
+                    if (sym instanceof AST_Expansion) {
+                        var elements = iife.args.slice(i);
+                        if (elements.every((arg) => !has_overlapping_symbol(fn, arg, fn_strict)
+                        )) {
+                            candidates.unshift([make_node(AST_VarDef, sym, {
+                                name: sym.expression,
+                                value: make_node(AST_Array, iife, {
+                                    elements: elements
+                                })
+                            })]);
+                        }
+                    } else {
+                        if (!arg) {
+                            arg = make_void_0(sym).transform(compressor);
+                        } else if (arg instanceof AST_Lambda && arg.pinned()
+                            || has_overlapping_symbol(fn, arg, fn_strict)) {
+                            arg = null;
+                        }
+                        if (arg)
+                            candidates.unshift([make_node(AST_VarDef, sym, {
+                                name: sym,
+                                value: arg
+                            })]);
+                    }
+                }
+            }
+        }
+
+        function extract_candidates(expr) {
+            hit_stack.push(expr);
+            if (expr instanceof AST_Assign) {
+                if (!expr.left.has_side_effects(compressor)
+                    && !(expr.right instanceof AST_Chain)) {
+                    candidates.push(hit_stack.slice());
+                }
+                extract_candidates(expr.right);
+            } else if (expr instanceof AST_Binary) {
+                extract_candidates(expr.left);
+                extract_candidates(expr.right);
+            } else if (expr instanceof AST_Call && !has_annotation(expr, _NOINLINE)) {
+                extract_candidates(expr.expression);
+                expr.args.forEach(extract_candidates);
+            } else if (expr instanceof AST_Case) {
+                extract_candidates(expr.expression);
+            } else if (expr instanceof AST_Conditional) {
+                extract_candidates(expr.condition);
+                extract_candidates(expr.consequent);
+                extract_candidates(expr.alternative);
+            } else if (expr instanceof AST_Definitions) {
+                var len = expr.definitions.length;
+                // limit number of trailing variable definitions for consideration
+                var i = len - 200;
+                if (i < 0)
+                    i = 0;
+                for (; i < len; i++) {
+                    extract_candidates(expr.definitions[i]);
+                }
+            } else if (expr instanceof AST_DWLoop) {
+                extract_candidates(expr.condition);
+                if (!(expr.body instanceof AST_Block)) {
+                    extract_candidates(expr.body);
+                }
+            } else if (expr instanceof AST_Exit) {
+                if (expr.value)
+                    extract_candidates(expr.value);
+            } else if (expr instanceof AST_For) {
+                if (expr.init)
+                    extract_candidates(expr.init);
+                if (expr.condition)
+                    extract_candidates(expr.condition);
+                if (expr.step)
+                    extract_candidates(expr.step);
+                if (!(expr.body instanceof AST_Block)) {
+                    extract_candidates(expr.body);
+                }
+            } else if (expr instanceof AST_ForIn) {
+                extract_candidates(expr.object);
+                if (!(expr.body instanceof AST_Block)) {
+                    extract_candidates(expr.body);
+                }
+            } else if (expr instanceof AST_If) {
+                extract_candidates(expr.condition);
+                if (!(expr.body instanceof AST_Block)) {
+                    extract_candidates(expr.body);
+                }
+                if (expr.alternative && !(expr.alternative instanceof AST_Block)) {
+                    extract_candidates(expr.alternative);
+                }
+            } else if (expr instanceof AST_Sequence) {
+                expr.expressions.forEach(extract_candidates);
+            } else if (expr instanceof AST_SimpleStatement) {
+                extract_candidates(expr.body);
+            } else if (expr instanceof AST_Switch) {
+                extract_candidates(expr.expression);
+                expr.body.forEach(extract_candidates);
+            } else if (expr instanceof AST_Unary) {
+                if (expr.operator == "++" || expr.operator == "--") {
+                    candidates.push(hit_stack.slice());
+                }
+            } else if (expr instanceof AST_VarDef) {
+                if (expr.value && !(expr.value instanceof AST_Chain)) {
+                    candidates.push(hit_stack.slice());
+                    extract_candidates(expr.value);
+                }
+            }
+            hit_stack.pop();
+        }
+
+        function find_stop(node, level, write_only) {
+            var parent = scanner.parent(level);
+            if (parent instanceof AST_Assign) {
+                if (write_only
+                    && !parent.logical
+                    && !(parent.left instanceof AST_PropAccess
+                        || lvalues.has(parent.left.name))) {
+                    return find_stop(parent, level + 1, write_only);
+                }
+                return node;
+            }
+            if (parent instanceof AST_Binary) {
+                if (write_only && (!lazy_op.has(parent.operator) || parent.left === node)) {
+                    return find_stop(parent, level + 1, write_only);
+                }
+                return node;
+            }
+            if (parent instanceof AST_Call)
+                return node;
+            if (parent instanceof AST_Case)
+                return node;
+            if (parent instanceof AST_Conditional) {
+                if (write_only && parent.condition === node) {
+                    return find_stop(parent, level + 1, write_only);
+                }
+                return node;
+            }
+            if (parent instanceof AST_Definitions) {
+                return find_stop(parent, level + 1, true);
+            }
+            if (parent instanceof AST_Exit) {
+                return write_only ? find_stop(parent, level + 1, write_only) : node;
+            }
+            if (parent instanceof AST_If) {
+                if (write_only && parent.condition === node) {
+                    return find_stop(parent, level + 1, write_only);
+                }
+                return node;
+            }
+            if (parent instanceof AST_IterationStatement)
+                return node;
+            if (parent instanceof AST_Sequence) {
+                return find_stop(parent, level + 1, parent.tail_node() !== node);
+            }
+            if (parent instanceof AST_SimpleStatement) {
+                return find_stop(parent, level + 1, true);
+            }
+            if (parent instanceof AST_Switch)
+                return node;
+            if (parent instanceof AST_VarDef)
+                return node;
+            return null;
+        }
+
+        function mangleable_var(var_def) {
+            var value = var_def.value;
+            if (!(value instanceof AST_SymbolRef))
+                return;
+            if (value.name == "arguments")
+                return;
+            var def = value.definition();
+            if (def.undeclared)
+                return;
+            return value_def = def;
+        }
+
+        function get_lhs(expr) {
+            if (expr instanceof AST_Assign && expr.logical) {
+                return false;
+            } else if (expr instanceof AST_VarDef && expr.name instanceof AST_SymbolDeclaration) {
+                var def = expr.name.definition();
+                if (!member(expr.name, def.orig))
+                    return;
+                var referenced = def.references.length - def.replaced;
+                if (!referenced)
+                    return;
+                var declared = def.orig.length - def.eliminated;
+                if (declared > 1 && !(expr.name instanceof AST_SymbolFunarg)
+                    || (referenced > 1 ? mangleable_var(expr) : !compressor.exposed(def))) {
+                    return make_node(AST_SymbolRef, expr.name, expr.name);
+                }
+            } else {
+                const lhs = expr instanceof AST_Assign
+                    ? expr.left
+                    : expr.expression;
+                return !is_ref_of(lhs, AST_SymbolConst)
+                    && !is_ref_of(lhs, AST_SymbolLet)
+                    && !is_ref_of(lhs, AST_SymbolUsing)
+                    && lhs;
+            }
+        }
+
+        function get_rvalue(expr) {
+            if (expr instanceof AST_Assign) {
+                return expr.right;
+            } else {
+                return expr.value;
+            }
+        }
+
+        function get_lvalues(expr) {
+            var lvalues = new Map();
+            if (expr instanceof AST_Unary)
+                return lvalues;
+            var tw = new TreeWalker(function (node) {
+                var sym = node;
+                while (sym instanceof AST_PropAccess)
+                    sym = sym.expression;
+                if (sym instanceof AST_SymbolRef) {
+                    const prev = lvalues.get(sym.name);
+                    if (!prev || !prev.modified) {
+                        lvalues.set(sym.name, {
+                            def: sym.definition(),
+                            modified: is_modified(compressor, tw, node, node, 0)
+                        });
+                    }
+                }
+            });
+            get_rvalue(expr).walk(tw);
+            return lvalues;
+        }
+
+        function remove_candidate(expr) {
+            if (expr.name instanceof AST_SymbolFunarg) {
+                var iife = compressor.parent(), argnames = compressor.self().argnames;
+                var index = argnames.indexOf(expr.name);
+                if (index < 0) {
+                    iife.args.length = Math.min(iife.args.length, argnames.length - 1);
+                } else {
+                    var args = iife.args;
+                    if (args[index])
+                        args[index] = make_node(AST_Number, args[index], {
+                            value: 0
+                        });
+                }
+                return true;
+            }
+            var found = false;
+            return statements[stat_index].transform(new TreeTransformer(function (node, descend, in_list) {
+                if (found)
+                    return node;
+                if (node === expr || node.body === expr) {
+                    found = true;
+                    if (node instanceof AST_VarDef) {
+                        node.value = node.name instanceof AST_SymbolConst
+                            ? make_void_0(node.value) // `const` always needs value.
+                            : null;
+                        return node;
+                    }
+                    return in_list ? MAP.skip : null;
+                }
+            }, function (node) {
+                if (node instanceof AST_Sequence)
+                    switch (node.expressions.length) {
+                        case 0: return null;
+                        case 1: return node.expressions[0];
+                    }
+            }));
+        }
+
+        function is_lhs_local(lhs) {
+            while (lhs instanceof AST_PropAccess)
+                lhs = lhs.expression;
+            return lhs instanceof AST_SymbolRef
+                && lhs.definition().scope.get_defun_scope() === defun_scope
+                && !(in_loop
+                    && (lvalues.has(lhs.name)
+                        || candidate instanceof AST_Unary
+                        || (candidate instanceof AST_Assign
+                            && !candidate.logical
+                            && candidate.operator != "=")));
+        }
+
+        function value_has_side_effects(expr) {
+            if (expr instanceof AST_Unary)
+                return unary_side_effects.has(expr.operator);
+            return get_rvalue(expr).has_side_effects(compressor);
+        }
+
+        function replace_all_symbols() {
+            if (side_effects)
+                return false;
+            if (value_def)
+                return true;
+            if (lhs instanceof AST_SymbolRef) {
+                var def = lhs.definition();
+                if (def.references.length - def.replaced == (candidate instanceof AST_VarDef ? 1 : 2)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        function may_modify(sym) {
+            if (!sym.definition)
+                return true; // AST_Destructuring
+            var def = sym.definition();
+            if (def.orig.length == 1 && def.orig[0] instanceof AST_SymbolDefun)
+                return false;
+            if (def.scope.get_defun_scope() !== defun_scope)
+                return true;
+            return def.references.some((ref) =>
+                ref.scope.get_defun_scope() !== defun_scope
+            );
+        }
+
+        function side_effects_external(node, lhs) {
+            if (node instanceof AST_Assign)
+                return side_effects_external(node.left, true);
+            if (node instanceof AST_Unary)
+                return side_effects_external(node.expression, true);
+            if (node instanceof AST_VarDef)
+                return node.value && side_effects_external(node.value);
+            if (lhs) {
+                if (node instanceof AST_Dot)
+                    return side_effects_external(node.expression, true);
+                if (node instanceof AST_Sub)
+                    return side_effects_external(node.expression, true);
+                if (node instanceof AST_SymbolRef)
+                    return node.definition().scope.get_defun_scope() !== defun_scope;
+            }
+            return false;
+        }
+
+        /**
+         * Will any of the pulled-in lvalues shadow a variable in newScope or parents?
+         * similar to scope_encloses_variables_in_this_scope */
+        function shadows(my_scope, lvalues) {
+            for (const { def } of lvalues.values()) {
+                const looked_up = my_scope.find_variable(def.name);
+                if (looked_up) {
+                    if (looked_up === def) continue;
+                    return true;
+                }
+            }
+            return false;
+        }
+    }
+
+    function eliminate_spurious_blocks(statements) {
+        var seen_dirs = [];
+        for (var i = 0; i < statements.length;) {
+            var stat = statements[i];
+            if (stat instanceof AST_BlockStatement && stat.body.every(can_be_evicted_from_block)) {
+                CHANGED = true;
+                eliminate_spurious_blocks(stat.body);
+                statements.splice(i, 1, ...stat.body);
+                i += stat.body.length;
+            } else if (stat instanceof AST_EmptyStatement) {
+                CHANGED = true;
+                statements.splice(i, 1);
+            } else if (stat instanceof AST_Directive) {
+                if (seen_dirs.indexOf(stat.value) < 0) {
+                    i++;
+                    seen_dirs.push(stat.value);
+                } else {
+                    CHANGED = true;
+                    statements.splice(i, 1);
+                }
+            } else
+                i++;
+        }
+    }
+
+    function handle_if_return(statements, compressor) {
+        var self = compressor.self();
+        var multiple_if_returns = has_multiple_if_returns(statements);
+        var in_lambda = self instanceof AST_Lambda;
+        // Prevent extremely deep nesting
+        // https://github.com/terser/terser/issues/1432
+        // https://github.com/webpack/webpack/issues/17548
+        const iteration_start = Math.min(statements.length, 500);
+        for (var i = iteration_start; --i >= 0;) {
+            var stat = statements[i];
+            var j = next_index(i);
+            var next = statements[j];
+
+            if (in_lambda && !next && stat instanceof AST_Return) {
+                if (!stat.value) {
+                    CHANGED = true;
+                    statements.splice(i, 1);
+                    continue;
+                }
+                if (stat.value instanceof AST_UnaryPrefix && stat.value.operator == "void") {
+                    CHANGED = true;
+                    statements[i] = make_node(AST_SimpleStatement, stat, {
+                        body: stat.value.expression
+                    });
+                    continue;
+                }
+            }
+
+            if (stat instanceof AST_If) {
+                let ab, new_else;
+
+                ab = aborts(stat.body);
+                if (
+                    can_merge_flow(ab)
+                    && (new_else = as_statement_array_with_return(stat.body, ab))
+                ) {
+                    if (ab.label) {
+                        remove(ab.label.thedef.references, ab);
+                    }
+                    CHANGED = true;
+                    stat = stat.clone();
+                    stat.condition = stat.condition.negate(compressor);
+                    stat.body = make_node(AST_BlockStatement, stat, {
+                        body: as_statement_array(stat.alternative).concat(extract_defuns())
+                    });
+                    stat.alternative = make_node(AST_BlockStatement, stat, {
+                        body: new_else
+                    });
+                    statements[i] = stat.transform(compressor);
+                    continue;
+                }
+
+                ab = aborts(stat.alternative);
+                if (
+                    can_merge_flow(ab)
+                    && (new_else = as_statement_array_with_return(stat.alternative, ab))
+                ) {
+                    if (ab.label) {
+                        remove(ab.label.thedef.references, ab);
+                    }
+                    CHANGED = true;
+                    stat = stat.clone();
+                    stat.body = make_node(AST_BlockStatement, stat.body, {
+                        body: as_statement_array(stat.body).concat(extract_defuns())
+                    });
+                    stat.alternative = make_node(AST_BlockStatement, stat.alternative, {
+                        body: new_else
+                    });
+                    statements[i] = stat.transform(compressor);
+                    continue;
+                }
+            }
+
+            if (stat instanceof AST_If && stat.body instanceof AST_Return) {
+                var value = stat.body.value;
+                //---
+                // pretty silly case, but:
+                // if (foo()) return; return; ==> foo(); return;
+                if (!value && !stat.alternative
+                    && (in_lambda && !next || next instanceof AST_Return && !next.value)) {
+                    CHANGED = true;
+                    statements[i] = make_node(AST_SimpleStatement, stat.condition, {
+                        body: stat.condition
+                    });
+                    continue;
+                }
+                //---
+                // if (foo()) return x; return y; ==> return foo() ? x : y;
+                if (value && !stat.alternative && next instanceof AST_Return && next.value) {
+                    CHANGED = true;
+                    stat = stat.clone();
+                    stat.alternative = next;
+                    statements[i] = stat.transform(compressor);
+                    statements.splice(j, 1);
+                    continue;
+                }
+                //---
+                // if (foo()) return x; [ return ; ] ==> return foo() ? x : undefined;
+                if (value && !stat.alternative
+                    && (!next && in_lambda && multiple_if_returns
+                        || next instanceof AST_Return)) {
+                    CHANGED = true;
+                    stat = stat.clone();
+                    stat.alternative = next || make_node(AST_Return, stat, {
+                        value: null
+                    });
+                    statements[i] = stat.transform(compressor);
+                    if (next)
+                        statements.splice(j, 1);
+                    continue;
+                }
+                //---
+                // if (a) return b; if (c) return d; e; ==> return a ? b : c ? d : void e;
+                //
+                // if sequences is not enabled, this can lead to an endless loop (issue #866).
+                // however, with sequences on this helps producing slightly better output for
+                // the example code.
+                var prev = statements[prev_index(i)];
+                if (compressor.option("sequences") && in_lambda && !stat.alternative
+                    && prev instanceof AST_If && prev.body instanceof AST_Return
+                    && next_index(j) == statements.length && next instanceof AST_SimpleStatement) {
+                    CHANGED = true;
+                    stat = stat.clone();
+                    stat.alternative = make_node(AST_BlockStatement, next, {
+                        body: [
+                            next,
+                            make_node(AST_Return, next, {
+                                value: null
+                            })
+                        ]
+                    });
+                    statements[i] = stat.transform(compressor);
+                    statements.splice(j, 1);
+                    continue;
+                }
+            }
+        }
+
+        function has_multiple_if_returns(statements) {
+            var n = 0;
+            for (var i = statements.length; --i >= 0;) {
+                var stat = statements[i];
+                if (stat instanceof AST_If && stat.body instanceof AST_Return) {
+                    if (++n > 1)
+                        return true;
+                }
+            }
+            return false;
+        }
+
+        function is_return_void(value) {
+            return !value || value instanceof AST_UnaryPrefix && value.operator == "void";
+        }
+
+        function can_merge_flow(ab) {
+            if (!ab)
+                return false;
+            for (var j = i + 1, len = statements.length; j < len; j++) {
+                var stat = statements[j];
+                if (stat instanceof AST_DefinitionsLike && !(stat instanceof AST_Var))
+                    return false;
+            }
+            var lct = ab instanceof AST_LoopControl ? compressor.loopcontrol_target(ab) : null;
+            return ab instanceof AST_Return && in_lambda && is_return_void(ab.value)
+                || ab instanceof AST_Continue && self === loop_body(lct)
+                || ab instanceof AST_Break && lct instanceof AST_BlockStatement && self === lct;
+        }
+
+        function extract_defuns() {
+            var tail = statements.slice(i + 1);
+            statements.length = i + 1;
+            return tail.filter(function (stat) {
+                if (stat instanceof AST_Defun) {
+                    statements.push(stat);
+                    return false;
+                }
+                return true;
+            });
+        }
+
+        function as_statement_array_with_return(node, ab) {
+            var body = as_statement_array(node);
+            if (ab !== body[body.length - 1]) {
+                return undefined;
+            }
+            body = body.slice(0, -1);
+            if (!body.every(stat => can_be_evicted_from_block(stat))) {
+                return undefined;
+            }
+            if (ab.value) {
+                body.push(make_node(AST_SimpleStatement, ab.value, {
+                    body: ab.value.expression
+                }));
+            }
+            return body;
+        }
+
+        function next_index(i) {
+            for (var j = i + 1, len = statements.length; j < len; j++) {
+                var stat = statements[j];
+                if (!(stat instanceof AST_Var && declarations_only(stat))) {
+                    break;
+                }
+            }
+            return j;
+        }
+
+        function prev_index(i) {
+            for (var j = i; --j >= 0;) {
+                var stat = statements[j];
+                if (!(stat instanceof AST_Var && declarations_only(stat))) {
+                    break;
+                }
+            }
+            return j;
+        }
+    }
+
+    function eliminate_dead_code(statements, compressor) {
+        var has_quit;
+        var self = compressor.self();
+        for (var i = 0, n = 0, len = statements.length; i < len; i++) {
+            var stat = statements[i];
+            if (stat instanceof AST_LoopControl) {
+                var lct = compressor.loopcontrol_target(stat);
+                if (stat instanceof AST_Break
+                    && !(lct instanceof AST_IterationStatement)
+                    && loop_body(lct) === self
+                    || stat instanceof AST_Continue
+                    && loop_body(lct) === self) {
+                    if (stat.label) {
+                        remove(stat.label.thedef.references, stat);
+                    }
+                } else {
+                    statements[n++] = stat;
+                }
+            } else {
+                statements[n++] = stat;
+            }
+            if (aborts(stat)) {
+                has_quit = statements.slice(i + 1);
+                break;
+            }
+        }
+        statements.length = n;
+        CHANGED = n != len;
+        if (has_quit)
+            has_quit.forEach(function (stat) {
+                extract_from_unreachable_code(compressor, stat, statements);
+            });
+    }
+
+    function declarations_only(node) {
+        return node.definitions.every((var_def) => !var_def.value);
+    }
+
+    function sequencesize(statements, compressor) {
+        if (statements.length < 2)
+            return;
+        var seq = [], n = 0;
+        function push_seq() {
+            if (!seq.length)
+                return;
+            var body = make_sequence(seq[0], seq);
+            statements[n++] = make_node(AST_SimpleStatement, body, { body: body });
+            seq = [];
+        }
+        for (var i = 0, len = statements.length; i < len; i++) {
+            var stat = statements[i];
+            if (stat instanceof AST_SimpleStatement) {
+                if (seq.length >= compressor.sequences_limit)
+                    push_seq();
+                var body = stat.body;
+                if (seq.length > 0)
+                    body = body.drop_side_effect_free(compressor);
+                if (body)
+                    merge_sequence(seq, body);
+            } else if (stat instanceof AST_Definitions && declarations_only(stat)
+                || stat instanceof AST_Defun) {
+                statements[n++] = stat;
+            } else {
+                push_seq();
+                statements[n++] = stat;
+            }
+        }
+        push_seq();
+        statements.length = n;
+        if (n != len)
+            CHANGED = true;
+    }
+
+    function to_simple_statement(block, decls) {
+        if (!(block instanceof AST_BlockStatement))
+            return block;
+        var stat = null;
+        for (var i = 0, len = block.body.length; i < len; i++) {
+            var line = block.body[i];
+            if (line instanceof AST_Var && declarations_only(line)) {
+                decls.push(line);
+            } else if (stat || line instanceof AST_DefinitionsLike && !(line instanceof AST_Var)) {
+                return false;
+            } else {
+                stat = line;
+            }
+        }
+        return stat;
+    }
+
+    function sequencesize_2(statements, compressor) {
+        function cons_seq(right) {
+            n--;
+            CHANGED = true;
+            var left = prev.body;
+            return make_sequence(left, [left, right]).transform(compressor);
+        }
+        var n = 0, prev;
+        for (var i = 0; i < statements.length; i++) {
+            var stat = statements[i];
+            if (prev) {
+                if (stat instanceof AST_Exit) {
+                    stat.value = cons_seq(stat.value || make_void_0(stat).transform(compressor));
+                } else if (stat instanceof AST_For) {
+                    if (!(stat.init instanceof AST_DefinitionsLike)) {
+                        const abort = walk(prev.body, node => {
+                            if (node instanceof AST_Scope)
+                                return true;
+                            if (node instanceof AST_Binary
+                                && node.operator === "in") {
+                                return walk_abort;
+                            }
+                        });
+                        if (!abort) {
+                            if (stat.init)
+                                stat.init = cons_seq(stat.init);
+                            else {
+                                stat.init = prev.body;
+                                n--;
+                                CHANGED = true;
+                            }
+                        }
+                    }
+                } else if (stat instanceof AST_ForIn) {
+                    if (!(stat.init instanceof AST_DefinitionsLike) || stat.init instanceof AST_Var) {
+                        stat.object = cons_seq(stat.object);
+                    }
+                } else if (stat instanceof AST_If) {
+                    stat.condition = cons_seq(stat.condition);
+                } else if (stat instanceof AST_Switch) {
+                    stat.expression = cons_seq(stat.expression);
+                } else if (stat instanceof AST_With) {
+                    stat.expression = cons_seq(stat.expression);
+                }
+            }
+            if (compressor.option("conditionals") && stat instanceof AST_If) {
+                var decls = [];
+                var body = to_simple_statement(stat.body, decls);
+                var alt = to_simple_statement(stat.alternative, decls);
+                if (body !== false && alt !== false && decls.length > 0) {
+                    var len = decls.length;
+                    decls.push(make_node(AST_If, stat, {
+                        condition: stat.condition,
+                        body: body || make_node(AST_EmptyStatement, stat.body),
+                        alternative: alt
+                    }));
+                    decls.unshift(n, 1);
+                    [].splice.apply(statements, decls);
+                    i += len;
+                    n += len + 1;
+                    prev = null;
+                    CHANGED = true;
+                    continue;
+                }
+            }
+            statements[n++] = stat;
+            prev = stat instanceof AST_SimpleStatement ? stat : null;
+        }
+        statements.length = n;
+    }
+
+    function join_object_assignments(defn, body) {
+        if (!(defn instanceof AST_Definitions))
+            return;
+        var def = defn.definitions[defn.definitions.length - 1];
+        if (!(def.value instanceof AST_Object))
+            return;
+        var exprs;
+        if (body instanceof AST_Assign && !body.logical) {
+            exprs = [body];
+        } else if (body instanceof AST_Sequence) {
+            exprs = body.expressions.slice();
+        }
+        if (!exprs)
+            return;
+        var trimmed = false;
+        do {
+            var node = exprs[0];
+            if (!(node instanceof AST_Assign))
+                break;
+            if (node.operator != "=")
+                break;
+            if (!(node.left instanceof AST_PropAccess))
+                break;
+            var sym = node.left.expression;
+            if (!(sym instanceof AST_SymbolRef))
+                break;
+            if (def.name.name != sym.name)
+                break;
+            if (!node.right.is_constant_expression(nearest_scope))
+                break;
+            var prop = node.left.property;
+            if (prop instanceof AST_Node) {
+                prop = prop.evaluate(compressor);
+            }
+            if (prop instanceof AST_Node)
+                break;
+            prop = "" + prop;
+            var diff = compressor.option("ecma") < 2015
+                && compressor.has_directive("use strict") ? function (node) {
+                    return node.key != prop && (node.key && node.key.name != prop);
+                } : function (node) {
+                    return node.key && node.key.name != prop;
+                };
+            if (!def.value.properties.every(diff))
+                break;
+            var p = def.value.properties.filter(function (p) { return p.key === prop; })[0];
+            if (!p) {
+                def.value.properties.push(make_node(AST_ObjectKeyVal, node, {
+                    key: prop,
+                    value: node.right
+                }));
+            } else {
+                p.value = new AST_Sequence({
+                    start: p.start,
+                    expressions: [p.value.clone(), node.right.clone()],
+                    end: p.end
+                });
+            }
+            exprs.shift();
+            trimmed = true;
+        } while (exprs.length);
+        return trimmed && exprs;
+    }
+
+    function join_consecutive_vars(statements) {
+        var defs;
+        for (var i = 0, j = -1, len = statements.length; i < len; i++) {
+            var stat = statements[i];
+            var prev = statements[j];
+            if (stat instanceof AST_Definitions) {
+                if (prev && prev.TYPE == stat.TYPE) {
+                    prev.definitions = prev.definitions.concat(stat.definitions);
+                    CHANGED = true;
+                } else if (defs && defs.TYPE == stat.TYPE && declarations_only(stat)) {
+                    defs.definitions = defs.definitions.concat(stat.definitions);
+                    CHANGED = true;
+                } else {
+                    statements[++j] = stat;
+                    defs = stat;
+                }
+            } else if (
+                stat instanceof AST_Using
+                && prev instanceof AST_Using
+                && prev.await === stat.await
+            ) {
+                prev.definitions = prev.definitions.concat(stat.definitions);
+            } else if (stat instanceof AST_Exit) {
+                stat.value = extract_object_assignments(stat.value);
+            } else if (stat instanceof AST_For) {
+                var exprs = join_object_assignments(prev, stat.init);
+                if (exprs) {
+                    CHANGED = true;
+                    stat.init = exprs.length ? make_sequence(stat.init, exprs) : null;
+                    statements[++j] = stat;
+                } else if (
+                    prev instanceof AST_Var
+                    && (!stat.init || stat.init.TYPE == prev.TYPE)
+                ) {
+                    if (stat.init) {
+                        prev.definitions = prev.definitions.concat(stat.init.definitions);
+                    }
+                    stat.init = prev;
+                    statements[j] = stat;
+                    CHANGED = true;
+                } else if (
+                    defs instanceof AST_Var
+                    && stat.init instanceof AST_Var
+                    && declarations_only(stat.init)
+                ) {
+                    defs.definitions = defs.definitions.concat(stat.init.definitions);
+                    stat.init = null;
+                    statements[++j] = stat;
+                    CHANGED = true;
+                } else {
+                    statements[++j] = stat;
+                }
+            } else if (stat instanceof AST_ForIn) {
+                stat.object = extract_object_assignments(stat.object);
+            } else if (stat instanceof AST_If) {
+                stat.condition = extract_object_assignments(stat.condition);
+            } else if (stat instanceof AST_SimpleStatement) {
+                var exprs = join_object_assignments(prev, stat.body);
+                if (exprs) {
+                    CHANGED = true;
+                    if (!exprs.length)
+                        continue;
+                    stat.body = make_sequence(stat.body, exprs);
+                }
+                statements[++j] = stat;
+            } else if (stat instanceof AST_Switch) {
+                stat.expression = extract_object_assignments(stat.expression);
+            } else if (stat instanceof AST_With) {
+                stat.expression = extract_object_assignments(stat.expression);
+            } else {
+                statements[++j] = stat;
+            }
+        }
+        statements.length = j + 1;
+
+        function extract_object_assignments(value) {
+            statements[++j] = stat;
+            var exprs = join_object_assignments(prev, value);
+            if (exprs) {
+                CHANGED = true;
+                if (exprs.length) {
+                    return make_sequence(value, exprs);
+                } else if (value instanceof AST_Sequence) {
+                    return value.tail_node().left;
+                } else {
+                    return value.left;
+                }
+            }
+            return value;
+        }
+    }
+}
Index: frontend/node_modules/terser/lib/equivalent-to.js
===================================================================
--- frontend/node_modules/terser/lib/equivalent-to.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/equivalent-to.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,314 @@
+import {
+    AST_Array,
+    AST_Atom,
+    AST_Await,
+    AST_BigInt,
+    AST_Binary,
+    AST_Block,
+    AST_Call,
+    AST_Catch,
+    AST_Chain,
+    AST_Class,
+    AST_ClassProperty,
+    AST_ClassPrivateProperty,
+    AST_ConciseMethod,
+    AST_Conditional,
+    AST_Debugger,
+    AST_DefinitionsLike,
+    AST_Destructuring,
+    AST_Directive,
+    AST_Do,
+    AST_Dot,
+    AST_DotHash,
+    AST_EmptyStatement,
+    AST_Expansion,
+    AST_Export,
+    AST_Finally,
+    AST_For,
+    AST_ForIn,
+    AST_ForOf,
+    AST_If,
+    AST_Import,
+    AST_DynamicImport,
+    AST_ImportMeta,
+    AST_Jump,
+    AST_LabeledStatement,
+    AST_Lambda,
+    AST_LoopControl,
+    AST_NameMapping,
+    AST_NewTarget,
+    AST_Node,
+    AST_Number,
+    AST_Object,
+    AST_ObjectGetter,
+    AST_ObjectKeyVal,
+    AST_ObjectProperty,
+    AST_ObjectSetter,
+    AST_PrefixedTemplateString,
+    AST_PrivateIn,
+    AST_PrivateMethod,
+    AST_PropAccess,
+    AST_RegExp,
+    AST_Sequence,
+    AST_SimpleStatement,
+    AST_String,
+    AST_Super,
+    AST_Switch,
+    AST_SwitchBranch,
+    AST_Symbol,
+    AST_TemplateSegment,
+    AST_TemplateString,
+    AST_This,
+    AST_Toplevel,
+    AST_Try,
+    AST_Unary,
+    AST_VarDefLike,
+    AST_While,
+    AST_With,
+    AST_Yield
+} from "./ast.js";
+
+const shallow_cmp = (node1, node2) => {
+    return (
+        node1 === null && node2 === null
+        || node1.TYPE === node2.TYPE && node1.shallow_cmp(node2)
+    );
+};
+
+export const equivalent_to = (tree1, tree2) => {
+    if (!shallow_cmp(tree1, tree2)) return false;
+    const walk_1_state = [tree1];
+    const walk_2_state = [tree2];
+
+    const walk_1_push = walk_1_state.push.bind(walk_1_state);
+    const walk_2_push = walk_2_state.push.bind(walk_2_state);
+
+    while (walk_1_state.length && walk_2_state.length) {
+        const node_1 = walk_1_state.pop();
+        const node_2 = walk_2_state.pop();
+
+        if (!shallow_cmp(node_1, node_2)) return false;
+
+        node_1._children_backwards(walk_1_push);
+        node_2._children_backwards(walk_2_push);
+
+        if (walk_1_state.length !== walk_2_state.length) {
+            // Different number of children
+            return false;
+        }
+    }
+
+    return walk_1_state.length == 0 && walk_2_state.length == 0;
+};
+
+const pass_through = () => true;
+
+AST_Node.prototype.shallow_cmp = function () {
+    throw new Error("did not find a shallow_cmp function for " + this.constructor.name);
+};
+
+AST_Debugger.prototype.shallow_cmp = pass_through;
+
+AST_Directive.prototype.shallow_cmp = function(other) {
+    return this.value === other.value;
+};
+
+AST_SimpleStatement.prototype.shallow_cmp = pass_through;
+
+AST_Block.prototype.shallow_cmp = pass_through;
+
+AST_EmptyStatement.prototype.shallow_cmp = pass_through;
+
+AST_LabeledStatement.prototype.shallow_cmp = function(other) {
+    return this.label.name === other.label.name;
+};
+
+AST_Do.prototype.shallow_cmp = pass_through;
+
+AST_While.prototype.shallow_cmp = pass_through;
+
+AST_For.prototype.shallow_cmp = function(other) {
+    return (this.init == null ? other.init == null : this.init === other.init) && (this.condition == null ? other.condition == null : this.condition === other.condition) && (this.step == null ? other.step == null : this.step === other.step);
+};
+
+AST_ForIn.prototype.shallow_cmp = pass_through;
+
+AST_ForOf.prototype.shallow_cmp = pass_through;
+
+AST_With.prototype.shallow_cmp = pass_through;
+
+AST_Toplevel.prototype.shallow_cmp = pass_through;
+
+AST_Expansion.prototype.shallow_cmp = pass_through;
+
+AST_Lambda.prototype.shallow_cmp = function(other) {
+    return this.is_generator === other.is_generator && this.async === other.async;
+};
+
+AST_Destructuring.prototype.shallow_cmp = function(other) {
+    return this.is_array === other.is_array;
+};
+
+AST_PrefixedTemplateString.prototype.shallow_cmp = pass_through;
+
+AST_TemplateString.prototype.shallow_cmp = pass_through;
+
+AST_TemplateSegment.prototype.shallow_cmp = function(other) {
+    return this.value === other.value;
+};
+
+AST_Jump.prototype.shallow_cmp = pass_through;
+
+AST_LoopControl.prototype.shallow_cmp = pass_through;
+
+AST_Await.prototype.shallow_cmp = pass_through;
+
+AST_Yield.prototype.shallow_cmp = function(other) {
+    return this.is_star === other.is_star;
+};
+
+AST_If.prototype.shallow_cmp = function(other) {
+    return this.alternative == null ? other.alternative == null : this.alternative === other.alternative;
+};
+
+AST_Switch.prototype.shallow_cmp = pass_through;
+
+AST_SwitchBranch.prototype.shallow_cmp = pass_through;
+
+AST_Try.prototype.shallow_cmp = function(other) {
+    return (this.body === other.body) && (this.bcatch == null ? other.bcatch == null : this.bcatch === other.bcatch) && (this.bfinally == null ? other.bfinally == null : this.bfinally === other.bfinally);
+};
+
+AST_Catch.prototype.shallow_cmp = function(other) {
+    return this.argname == null ? other.argname == null : this.argname === other.argname;
+};
+
+AST_Finally.prototype.shallow_cmp = pass_through;
+
+AST_DefinitionsLike.prototype.shallow_cmp = pass_through;
+
+AST_VarDefLike.prototype.shallow_cmp = function(other) {
+    return this.value == null ? other.value == null : this.value === other.value;
+};
+
+AST_NameMapping.prototype.shallow_cmp = pass_through;
+
+AST_Import.prototype.shallow_cmp = function(other) {
+    return (this.imported_name || null) === (other.imported_name || null)
+        && (this.imported_names || null) === (other.imported_names || null)
+        && (this.attributes || null) === (other.attributes || null)
+        && (this.phase || null) === (other.phase || null);
+};
+
+AST_ImportMeta.prototype.shallow_cmp = pass_through;
+
+AST_DynamicImport.prototype.shallow_cmp = function(other) {
+    return (this.phase || null) === (other.phase || null) && this.args.length === other.args.length;
+};
+
+AST_Export.prototype.shallow_cmp = function(other) {
+    return (this.exported_definition == null ? other.exported_definition == null : this.exported_definition === other.exported_definition) && (this.exported_value == null ? other.exported_value == null : this.exported_value === other.exported_value) && (this.exported_names == null ? other.exported_names == null : this.exported_names === other.exported_names) && (this.attributes == null ? other.attributes == null : this.attributes === other.attributes) && this.module_name === other.module_name && this.is_default === other.is_default;
+};
+
+AST_Call.prototype.shallow_cmp = pass_through;
+
+AST_Sequence.prototype.shallow_cmp = pass_through;
+
+AST_PropAccess.prototype.shallow_cmp = pass_through;
+
+AST_Chain.prototype.shallow_cmp = pass_through;
+
+AST_Dot.prototype.shallow_cmp = function(other) {
+    return (
+        this.property === other.property
+        && !!this.quote === !!other.quote
+    );
+};
+
+AST_DotHash.prototype.shallow_cmp = function(other) {
+    return this.property === other.property;
+};
+
+AST_Unary.prototype.shallow_cmp = function(other) {
+    return this.operator === other.operator;
+};
+
+AST_Binary.prototype.shallow_cmp = function(other) {
+    return this.operator === other.operator;
+};
+
+AST_PrivateIn.prototype.shallow_cmp = pass_through;
+
+AST_Conditional.prototype.shallow_cmp = pass_through;
+
+AST_Array.prototype.shallow_cmp = pass_through;
+
+AST_Object.prototype.shallow_cmp = pass_through;
+
+AST_ObjectProperty.prototype.shallow_cmp = pass_through;
+
+AST_ObjectKeyVal.prototype.shallow_cmp = function(other) {
+    return this.key === other.key && this.quote === other.quote;
+};
+
+AST_ObjectSetter.prototype.shallow_cmp = function(other) {
+    return this.static === other.static;
+};
+
+AST_ObjectGetter.prototype.shallow_cmp = function(other) {
+    return this.static === other.static;
+};
+
+AST_ConciseMethod.prototype.shallow_cmp = function(other) {
+    return this.static === other.static;
+};
+
+AST_PrivateMethod.prototype.shallow_cmp = function(other) {
+    return this.static === other.static;
+};
+
+AST_Class.prototype.shallow_cmp = function(other) {
+    return (this.name == null ? other.name == null : this.name === other.name) && (this.extends == null ? other.extends == null : this.extends === other.extends);
+};
+
+AST_ClassProperty.prototype.shallow_cmp = function(other) {
+    return this.static === other.static
+        && (typeof this.key === "string"
+            ? this.key === other.key
+            : true /* AST_Node handled elsewhere */);
+};
+
+AST_ClassPrivateProperty.prototype.shallow_cmp = function(other) {
+    return this.static === other.static;
+};
+
+AST_Symbol.prototype.shallow_cmp = function(other) {
+    return this.name === other.name;
+};
+
+AST_NewTarget.prototype.shallow_cmp = pass_through;
+
+AST_This.prototype.shallow_cmp = pass_through;
+
+AST_Super.prototype.shallow_cmp = pass_through;
+
+AST_String.prototype.shallow_cmp = function(other) {
+    return this.value === other.value;
+};
+
+AST_Number.prototype.shallow_cmp = function(other) {
+    return this.value === other.value;
+};
+
+AST_BigInt.prototype.shallow_cmp = function(other) {
+    return this.value === other.value;
+};
+
+AST_RegExp.prototype.shallow_cmp = function (other) {
+    return (
+        this.value.flags === other.value.flags
+        && this.value.source === other.value.source
+    );
+};
+
+AST_Atom.prototype.shallow_cmp = pass_through;
Index: frontend/node_modules/terser/lib/minify.js
===================================================================
--- frontend/node_modules/terser/lib/minify.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/minify.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,412 @@
+"use strict";
+/* eslint-env browser, es6, node */
+
+import {
+    defaults,
+    map_from_object,
+    map_to_object,
+    HOP,
+} from "./utils/index.js";
+import { AST_Toplevel, AST_Node, walk, AST_Scope } from "./ast.js";
+import { parse } from "./parse.js";
+import { OutputStream } from "./output.js";
+import { Compressor } from "./compress/index.js";
+import { base54 } from "./scope.js";
+import { SourceMap } from "./sourcemap.js";
+import {
+    mangle_properties,
+    mangle_private_properties,
+    reserve_quoted_keys,
+    find_annotated_props,
+} from "./propmangle.js";
+
+// to/from base64 functions
+// Prefer built-in Buffer, if available, then use hack
+// https://developer.mozilla.org/en-US/docs/Glossary/Base64#The_Unicode_Problem
+var to_ascii = typeof Buffer !== "undefined"
+    ? (b64) => Buffer.from(b64, "base64").toString()
+    : (b64) => decodeURIComponent(escape(atob(b64)));
+var to_base64 = typeof Buffer !== "undefined"
+    ? (str) => Buffer.from(str).toString("base64")
+    : (str) => btoa(unescape(encodeURIComponent(str)));
+
+function read_source_map(code) {
+    var match = /(?:^|[^.])\/\/# sourceMappingURL=data:application\/json(;[\w=-]*)?;base64,([+/0-9A-Za-z]*=*)\s*$/.exec(code);
+    if (!match) {
+        console.warn("inline source map not found");
+        return null;
+    }
+    return to_ascii(match[2]);
+}
+
+function set_shorthand(name, options, keys) {
+    if (options[name]) {
+        keys.forEach(function(key) {
+            if (options[key]) {
+                if (typeof options[key] != "object") options[key] = {};
+                if (!(name in options[key])) options[key][name] = options[name];
+            }
+        });
+    }
+}
+
+function init_cache(cache) {
+    if (!cache) return;
+    if (!("props" in cache)) {
+        cache.props = new Map();
+    } else if (!(cache.props instanceof Map)) {
+        cache.props = map_from_object(cache.props);
+    }
+}
+
+function cache_to_json(cache) {
+    return {
+        props: map_to_object(cache.props)
+    };
+}
+
+function log_input(files, options, fs, debug_folder) {
+    if (!(fs && fs.writeFileSync && fs.mkdirSync)) {
+        return;
+    }
+
+    try {
+        fs.mkdirSync(debug_folder);
+    } catch (e) {
+        if (e.code !== "EEXIST") throw e;
+    }
+
+    const log_path = `${debug_folder}/terser-debug-${(Math.random() * 9999999) | 0}.log`;
+
+    options = options || {};
+
+    const options_str = JSON.stringify(options, (_key, thing) => {
+        if (typeof thing === "function") return "[Function " + thing.toString() + "]";
+        if (thing instanceof RegExp) return "[RegExp " + thing.toString() + "]";
+        return thing;
+    }, 4);
+
+    const files_str = (file) => {
+        if (typeof file === "object" && options.parse && options.parse.spidermonkey) {
+            return JSON.stringify(file, null, 2);
+        } else if (typeof file === "object") {
+            return Object.keys(file)
+                .map((key) => key + ": " + files_str(file[key]))
+                .join("\n\n");
+        } else if (typeof file === "string") {
+            return "```\n" + file + "\n```";
+        } else {
+            return file; // What do?
+        }
+    };
+
+    fs.writeFileSync(log_path, "Options: \n" + options_str + "\n\nInput files:\n\n" + files_str(files) + "\n");
+}
+
+function* minify_sync_or_async(files, options, _fs_module) {
+    if (
+        _fs_module
+        && typeof process === "object"
+        && process.env
+        && typeof process.env.TERSER_DEBUG_DIR === "string"
+    ) {
+        log_input(files, options, _fs_module, process.env.TERSER_DEBUG_DIR);
+    }
+
+    options = defaults(options, {
+        compress: {},
+        ecma: undefined,
+        enclose: false,
+        ie8: false,
+        keep_classnames: undefined,
+        keep_fnames: false,
+        mangle: {},
+        module: false,
+        nameCache: null,
+        output: null,
+        format: null,
+        parse: {},
+        rename: undefined,
+        safari10: false,
+        sourceMap: false,
+        spidermonkey: false,
+        timings: false,
+        toplevel: false,
+        warnings: false,
+        wrap: false,
+    }, true);
+
+    var timings = options.timings && {
+        start: Date.now()
+    };
+    if (options.keep_classnames === undefined) {
+        options.keep_classnames = options.keep_fnames;
+    }
+    if (options.rename === undefined) {
+        options.rename = options.compress && options.mangle;
+    }
+    if (options.output && options.format) {
+        throw new Error("Please only specify either output or format option, preferrably format.");
+    }
+    options.format = options.format || options.output || {};
+    set_shorthand("ecma", options, [ "parse", "compress", "format" ]);
+    set_shorthand("ie8", options, [ "compress", "mangle", "format" ]);
+    set_shorthand("keep_classnames", options, [ "compress", "mangle" ]);
+    set_shorthand("keep_fnames", options, [ "compress", "mangle" ]);
+    set_shorthand("module", options, [ "parse", "compress", "mangle" ]);
+    set_shorthand("safari10", options, [ "mangle", "format" ]);
+    set_shorthand("toplevel", options, [ "compress", "mangle" ]);
+    set_shorthand("warnings", options, [ "compress" ]); // legacy
+    var quoted_props;
+    if (options.mangle) {
+        options.mangle = defaults(options.mangle, {
+            cache: options.nameCache && (options.nameCache.vars || {}),
+            eval: false,
+            ie8: false,
+            keep_classnames: false,
+            keep_fnames: false,
+            module: false,
+            nth_identifier: base54,
+            properties: false,
+            reserved: [],
+            safari10: false,
+            toplevel: false,
+        }, true);
+        if (options.mangle.properties) {
+            if (typeof options.mangle.properties != "object") {
+                options.mangle.properties = {};
+            }
+            if (options.mangle.properties.keep_quoted) {
+                quoted_props = options.mangle.properties.reserved;
+                if (!Array.isArray(quoted_props)) quoted_props = [];
+                options.mangle.properties.reserved = quoted_props;
+            }
+            if (options.nameCache && !("cache" in options.mangle.properties)) {
+                options.mangle.properties.cache = options.nameCache.props || {};
+            }
+        }
+        init_cache(options.mangle.cache);
+        init_cache(options.mangle.properties.cache);
+    }
+    if (options.sourceMap) {
+        options.sourceMap = defaults(options.sourceMap, {
+            asObject: false,
+            content: null,
+            filename: null,
+            includeSources: false,
+            root: null,
+            url: null,
+        }, true);
+    }
+
+    // -- Parse phase --
+    if (timings) timings.parse = Date.now();
+    var toplevel;
+    if (files instanceof AST_Toplevel) {
+        toplevel = files;
+    } else {
+        if (typeof files == "string" || (options.parse.spidermonkey && !Array.isArray(files))) {
+            files = [ files ];
+        }
+        options.parse = options.parse || {};
+        options.parse.toplevel = null;
+
+        if (options.parse.spidermonkey) {
+            options.parse.toplevel = AST_Node.from_mozilla_ast(Object.keys(files).reduce(function(toplevel, name) {
+                if (!toplevel) return files[name];
+                toplevel.body = toplevel.body.concat(files[name].body);
+                return toplevel;
+            }, null));
+        } else {
+            delete options.parse.spidermonkey;
+
+            for (var name in files) if (HOP(files, name)) {
+                options.parse.filename = name;
+                options.parse.toplevel = parse(files[name], options.parse);
+                if (options.sourceMap && options.sourceMap.content == "inline") {
+                    if (Object.keys(files).length > 1)
+                        throw new Error("inline source map only works with singular input");
+                    options.sourceMap.content = read_source_map(files[name]);
+                }
+            }
+        }
+        if (options.parse.toplevel === null) {
+            throw new Error("no source file given");
+        }
+
+        toplevel = options.parse.toplevel;
+    }
+    if (quoted_props && options.mangle.properties.keep_quoted !== "strict") {
+        reserve_quoted_keys(toplevel, quoted_props);
+    }
+    var annotated_props;
+    if (options.mangle && options.mangle.properties) {
+        annotated_props = find_annotated_props(toplevel);
+    }
+    if (options.wrap) {
+        toplevel = toplevel.wrap_commonjs(options.wrap);
+    }
+    if (options.enclose) {
+        toplevel = toplevel.wrap_enclose(options.enclose);
+    }
+    if (timings) timings.rename = Date.now();
+    // disable rename on harmony due to expand_names bug in for-of loops
+    // https://github.com/mishoo/UglifyJS2/issues/2794
+    if (0 && options.rename) {
+        toplevel.figure_out_scope(options.mangle);
+        toplevel.expand_names(options.mangle);
+    }
+
+    // -- Compress phase --
+    if (timings) timings.compress = Date.now();
+    if (options.compress) {
+        toplevel = new Compressor(options.compress, {
+            mangle_options: options.mangle
+        }).compress(toplevel);
+    }
+
+    // -- Mangle phase --
+    if (timings) timings.scope = Date.now();
+    if (options.mangle) toplevel.figure_out_scope(options.mangle);
+    if (timings) timings.mangle = Date.now();
+    if (options.mangle) {
+        toplevel.compute_char_frequency(options.mangle);
+        toplevel.mangle_names(options.mangle);
+        toplevel = mangle_private_properties(toplevel, options.mangle);
+    }
+    if (timings) timings.properties = Date.now();
+    if (options.mangle && options.mangle.properties) {
+        toplevel = mangle_properties(toplevel, options.mangle.properties, annotated_props);
+    }
+
+    // Format phase
+    if (timings) timings.format = Date.now();
+    var result = {};
+    if (options.format.ast) {
+        result.ast = toplevel;
+    }
+    if (options.format.spidermonkey) {
+        result.ast = toplevel.to_mozilla_ast();
+    }
+    let format_options;
+    if (!HOP(options.format, "code") || options.format.code) {
+        // Make a shallow copy so that we can modify without mutating the user's input.
+        format_options = {...options.format};
+        if (!format_options.ast) {
+            // Destroy stuff to save RAM. (unless the deprecated `ast` option is on)
+            format_options._destroy_ast = true;
+
+            walk(toplevel, node => {
+                if (node instanceof AST_Scope) {
+                    node.variables = undefined;
+                    node.enclosed = undefined;
+                    node.parent_scope = undefined;
+                }
+                if (node.block_scope) {
+                    node.block_scope.variables = undefined;
+                    node.block_scope.enclosed = undefined;
+                    node.block_scope.parent_scope = undefined;
+                }
+            });
+        }
+
+        if (options.sourceMap) {
+            if (options.sourceMap.includeSources && files instanceof AST_Toplevel) {
+                throw new Error("original source content unavailable");
+            }
+            format_options.source_map = yield* SourceMap({
+                file: options.sourceMap.filename,
+                orig: options.sourceMap.content,
+                root: options.sourceMap.root,
+                files: options.sourceMap.includeSources ? files : null,
+            });
+        }
+        delete format_options.ast;
+        delete format_options.code;
+        delete format_options.spidermonkey;
+        var stream = OutputStream(format_options);
+        toplevel.print(stream);
+        result.code = stream.get();
+        if (options.sourceMap) {
+            Object.defineProperty(result, "map", {
+                configurable: true,
+                enumerable: true,
+                get() {
+                    const map = format_options.source_map.getEncoded();
+                    return (result.map = options.sourceMap.asObject ? map : JSON.stringify(map));
+                },
+                set(value) {
+                    Object.defineProperty(result, "map", {
+                        value,
+                        writable: true,
+                    });
+                }
+            });
+            result.decoded_map = format_options.source_map.getDecoded();
+            if (options.sourceMap.url == "inline") {
+                var sourceMap = typeof result.map === "object" ? JSON.stringify(result.map) : result.map;
+                result.code += "\n//# sourceMappingURL=data:application/json;charset=utf-8;base64," + to_base64(sourceMap);
+            } else if (options.sourceMap.url) {
+                result.code += "\n//# sourceMappingURL=" + options.sourceMap.url;
+            }
+        }
+    }
+    if (options.nameCache && options.mangle) {
+        if (options.mangle.cache) options.nameCache.vars = cache_to_json(options.mangle.cache);
+        if (options.mangle.properties && options.mangle.properties.cache) {
+            options.nameCache.props = cache_to_json(options.mangle.properties.cache);
+        }
+    }
+    if (format_options && format_options.source_map) {
+        format_options.source_map.destroy();
+    }
+    if (timings) {
+        timings.end = Date.now();
+        result.timings = {
+            parse: 1e-3 * (timings.rename - timings.parse),
+            rename: 1e-3 * (timings.compress - timings.rename),
+            compress: 1e-3 * (timings.scope - timings.compress),
+            scope: 1e-3 * (timings.mangle - timings.scope),
+            mangle: 1e-3 * (timings.properties - timings.mangle),
+            properties: 1e-3 * (timings.format - timings.properties),
+            format: 1e-3 * (timings.end - timings.format),
+            total: 1e-3 * (timings.end - timings.start)
+        };
+    }
+    return result;
+}
+
+async function minify(files, options, _fs_module) {
+    const gen = minify_sync_or_async(files, options, _fs_module);
+
+    let yielded;
+    let val;
+    do {
+        val = gen.next(await yielded);
+        yielded = val.value;
+    } while (!val.done);
+
+    return val.value;
+}
+
+function minify_sync(files, options, _fs_module) {
+    const gen = minify_sync_or_async(files, options, _fs_module);
+
+    let yielded;
+    let val;
+    do {
+        if (yielded && typeof yielded.then === "function") {
+            throw new Error("minify_sync cannot be used with the legacy source-map module");
+        }
+        val = gen.next(yielded);
+        yielded = val.value;
+    } while (!val.done);
+
+    return val.value;
+}
+
+export {
+  minify,
+  minify_sync,
+  to_ascii,
+};
Index: frontend/node_modules/terser/lib/mozilla-ast.js
===================================================================
--- frontend/node_modules/terser/lib/mozilla-ast.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/mozilla-ast.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,2120 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+import { make_node } from "./utils/index.js";
+import {
+    AST_Accessor,
+    AST_Array,
+    AST_Arrow,
+    AST_Assign,
+    AST_Atom,
+    AST_Await,
+    AST_BigInt,
+    AST_Binary,
+    AST_Block,
+    AST_BlockStatement,
+    AST_Boolean,
+    AST_Break,
+    AST_Call,
+    AST_Case,
+    AST_Catch,
+    AST_Chain,
+    AST_Class,
+    AST_ClassStaticBlock,
+    AST_ClassExpression,
+    AST_ClassProperty,
+    AST_ClassPrivateProperty,
+    AST_ConciseMethod,
+    AST_Conditional,
+    AST_Const,
+    AST_Constant,
+    AST_Continue,
+    AST_Debugger,
+    AST_Default,
+    AST_DefaultAssign,
+    AST_DefClass,
+    AST_DefinitionsLike,
+    AST_Defun,
+    AST_Destructuring,
+    AST_Directive,
+    AST_Do,
+    AST_Dot,
+    AST_DotHash,
+    AST_EmptyStatement,
+    AST_Expansion,
+    AST_Export,
+    AST_False,
+    AST_Finally,
+    AST_For,
+    AST_ForIn,
+    AST_ForOf,
+    AST_Function,
+    AST_Hole,
+    AST_If,
+    AST_DynamicImport,
+    AST_Import,
+    AST_ImportMeta,
+    AST_Label,
+    AST_LabeledStatement,
+    AST_LabelRef,
+    AST_Lambda,
+    AST_Let,
+    AST_NameMapping,
+    AST_New,
+    AST_NewTarget,
+    AST_Node,
+    AST_Null,
+    AST_Number,
+    AST_Object,
+    AST_ObjectGetter,
+    AST_ObjectKeyVal,
+    AST_ObjectProperty,
+    AST_ObjectSetter,
+    AST_PrefixedTemplateString,
+    AST_PrivateGetter,
+    AST_PrivateMethod,
+    AST_PrivateSetter,
+    AST_PrivateIn,
+    AST_PropAccess,
+    AST_RegExp,
+    AST_Return,
+    AST_Sequence,
+    AST_SimpleStatement,
+    AST_Statement,
+    AST_String,
+    AST_Sub,
+    AST_Super,
+    AST_Switch,
+    AST_SwitchBranch,
+    AST_Symbol,
+    AST_SymbolCatch,
+    AST_SymbolClass,
+    AST_SymbolClassProperty,
+    AST_SymbolPrivateProperty,
+    AST_SymbolConst,
+    AST_SymbolDefClass,
+    AST_SymbolDefun,
+    AST_SymbolExport,
+    AST_SymbolExportForeign,
+    AST_SymbolFunarg,
+    AST_SymbolImport,
+    AST_SymbolImportForeign,
+    AST_SymbolLambda,
+    AST_SymbolLet,
+    AST_SymbolMethod,
+    AST_SymbolRef,
+    AST_SymbolVar,
+    AST_SymbolUsing,
+    AST_TemplateSegment,
+    AST_TemplateString,
+    AST_This,
+    AST_Throw,
+    AST_Token,
+    AST_Toplevel,
+    AST_True,
+    AST_Try,
+    AST_TryBlock,
+    AST_Unary,
+    AST_UnaryPostfix,
+    AST_UnaryPrefix,
+    AST_Using,
+    AST_UsingDef,
+    AST_Var,
+    AST_VarDef,
+    AST_VarDefLike,
+    AST_While,
+    AST_With,
+    AST_Yield,
+} from "./ast.js";
+import { is_basic_identifier_string } from "./parse.js";
+
+(function() {
+
+    var normalize_directives = function(body) {
+        for (var i = 0; i < body.length; i++) {
+            if (body[i] instanceof AST_Statement && body[i].body instanceof AST_String) {
+                body[i] = new AST_Directive({
+                    start: body[i].start,
+                    end: body[i].end,
+                    quote: '"',
+                    value: body[i].body.value
+                });
+            } else {
+                return body;
+            }
+        }
+
+        return body;
+    };
+
+    function import_attributes_from_moz(attributes) {
+        if (attributes && attributes.length > 0) {
+            return new AST_Object({
+                start: my_start_token(attributes),
+                end: my_end_token(attributes),
+                properties: attributes.map((attr) =>
+                    new AST_ObjectKeyVal({
+                        start: my_start_token(attr),
+                        end: my_end_token(attr),
+                        key: attr.key.name || attr.key.value,
+                        value: from_moz(attr.value)
+                    })
+                )
+            });
+        }
+        return null;
+    }
+
+    var MOZ_TO_ME = {
+        Program: function(M) {
+            return new AST_Toplevel({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                body: normalize_directives(M.body.map(from_moz))
+            });
+        },
+
+        ArrayPattern: function(M) {
+            return new AST_Destructuring({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                names: M.elements.map(function(elm) {
+                    if (elm === null) {
+                        return new AST_Hole();
+                    }
+                    return from_moz(elm);
+                }),
+                is_array: true
+            });
+        },
+
+        ObjectPattern: function(M) {
+            return new AST_Destructuring({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                names: M.properties.map(from_moz),
+                is_array: false
+            });
+        },
+
+        AssignmentPattern: function(M) {
+            return new AST_DefaultAssign({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                left: from_moz(M.left),
+                operator: "=",
+                right: from_moz(M.right)
+            });
+        },
+
+        SpreadElement: function(M) {
+            return new AST_Expansion({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.argument)
+            });
+        },
+
+        RestElement: function(M) {
+            return new AST_Expansion({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.argument)
+            });
+        },
+
+        TemplateElement: function(M) {
+            return new AST_TemplateSegment({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                value: M.value.cooked,
+                raw: M.value.raw
+            });
+        },
+
+        TemplateLiteral: function(M) {
+            var segments = [];
+            for (var i = 0; i < M.quasis.length; i++) {
+                segments.push(from_moz(M.quasis[i]));
+                if (M.expressions[i]) {
+                    segments.push(from_moz(M.expressions[i]));
+                }
+            }
+            return new AST_TemplateString({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                segments: segments
+            });
+        },
+
+        TaggedTemplateExpression: function(M) {
+            return new AST_PrefixedTemplateString({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                template_string: from_moz(M.quasi),
+                prefix: from_moz(M.tag)
+            });
+        },
+
+        FunctionDeclaration: function(M) {
+            return new AST_Defun({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                name: M.id && from_moz_symbol(AST_SymbolDefun, M.id),
+                argnames: M.params.map(M => from_moz_pattern(M, AST_SymbolFunarg)),
+                is_generator: M.generator,
+                async: M.async,
+                body: normalize_directives(from_moz(M.body).body)
+            });
+        },
+
+        FunctionExpression: function(M) {
+            return from_moz_lambda(M, /*is_method=*/false);
+        },
+
+        ArrowFunctionExpression: function(M) {
+            const body = M.body.type === "BlockStatement"
+                ? from_moz(M.body).body
+                : [make_node(AST_Return, {}, { value: from_moz(M.body) })];
+            return new AST_Arrow({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                argnames: M.params.map(p => from_moz_pattern(p, AST_SymbolFunarg)),
+                body,
+                async: M.async,
+            });
+        },
+
+        ExpressionStatement: function(M) {
+            return new AST_SimpleStatement({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                body: from_moz(M.expression)
+            });
+        },
+
+        TryStatement: function(M) {
+            var handlers = M.handlers || [M.handler];
+            if (handlers.length > 1 || M.guardedHandlers && M.guardedHandlers.length) {
+                throw new Error("Multiple catch clauses are not supported.");
+            }
+            return new AST_Try({
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                body     : new AST_TryBlock(from_moz(M.block)),
+                bcatch   : from_moz(handlers[0]),
+                bfinally : M.finalizer ? new AST_Finally(from_moz(M.finalizer)) : null
+            });
+        },
+
+        Property: function(M) {
+            if (M.kind == "init" && !M.method) {
+                var args = {
+                    start    : my_start_token(M.key || M.value),
+                    end      : my_end_token(M.value),
+                    key      : M.computed
+                                ? from_moz(M.key)
+                                : M.key.name || String(M.key.value),
+                    quote    : from_moz_quote(M.key, M.computed),
+                    static   : false, // always an object
+                    value    : from_moz(M.value)
+                };
+
+                return new AST_ObjectKeyVal(args);
+            } else {
+                var value = from_moz_lambda(M.value, /*is_method=*/true);
+                var args = {
+                    start    : my_start_token(M.key || M.value),
+                    end      : my_end_token(M.value),
+                    key      : M.computed
+                                ? from_moz(M.key)
+                                : from_moz_symbol(AST_SymbolMethod, M.key),
+                    quote    : from_moz_quote(M.key, M.computed),
+                    static   : false, // always an object
+                    value,
+                };
+
+                if (M.kind == "get") return new AST_ObjectGetter(args);
+                if (M.kind == "set") return new AST_ObjectSetter(args);
+                if (M.method) return new AST_ConciseMethod(args);
+            }
+        },
+
+        MethodDefinition: function(M) {
+            const is_private = M.key.type === "PrivateIdentifier";
+            const key = M.computed ? from_moz(M.key) : new AST_SymbolMethod({ name: M.key.name || String(M.key.value) });
+
+            var args = {
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                key,
+                quote    : from_moz_quote(M.key, M.computed),
+                value    : from_moz_lambda(M.value, /*is_method=*/true),
+                static   : M.static,
+            };
+            if (M.kind == "get") {
+                return new (is_private ? AST_PrivateGetter : AST_ObjectGetter)(args);
+            }
+            if (M.kind == "set") {
+                return new (is_private ? AST_PrivateSetter : AST_ObjectSetter)(args);
+            }
+            return new (is_private ? AST_PrivateMethod : AST_ConciseMethod)(args);
+        },
+
+        FieldDefinition: function(M) {
+            let key;
+            if (M.computed) {
+                key = from_moz(M.key);
+            } else {
+                if (M.key.type !== "Identifier") throw new Error("Non-Identifier key in FieldDefinition");
+                key = from_moz(M.key);
+            }
+            return new AST_ClassProperty({
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                quote    : from_moz_quote(M.key, M.computed),
+                key,
+                value    : from_moz(M.value),
+                static   : M.static,
+            });
+        },
+
+        PropertyDefinition: function(M) {
+            let key;
+            if (M.computed) {
+                key = from_moz(M.key);
+            } else if (M.key.type === "PrivateIdentifier") {
+                return new AST_ClassPrivateProperty({
+                    start    : my_start_token(M),
+                    end      : my_end_token(M),
+                    key      : from_moz(M.key),
+                    value    : from_moz(M.value),
+                    static   : M.static,
+                });
+            } else {
+                key = from_moz_symbol(AST_SymbolClassProperty, M.key);
+            }
+
+            return new AST_ClassProperty({
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                quote    : from_moz_quote(M.key, M.computed),
+                key,
+                value    : from_moz(M.value),
+                static   : M.static,
+            });
+        },
+
+        PrivateIdentifier: function (M) {
+            return new AST_SymbolPrivateProperty({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                name: M.name
+            });
+        },
+
+        StaticBlock: function(M) {
+            return new AST_ClassStaticBlock({
+                start : my_start_token(M),
+                end   : my_end_token(M),
+                body  : M.body.map(from_moz),
+            });
+        },
+
+        ArrayExpression: function(M) {
+            return new AST_Array({
+                start    : my_start_token(M),
+                end      : my_end_token(M),
+                elements : M.elements.map(function(elem) {
+                    return elem === null ? new AST_Hole() : from_moz(elem);
+                })
+            });
+        },
+
+        ObjectExpression: function(M) {
+            return new AST_Object({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                properties : M.properties.map(function(prop) {
+                    if (prop.type === "SpreadElement") {
+                        return from_moz(prop);
+                    }
+                    prop.type = "Property";
+                    return from_moz(prop);
+                })
+            });
+        },
+
+        SequenceExpression: function(M) {
+            return new AST_Sequence({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                expressions: M.expressions.map(from_moz)
+            });
+        },
+
+        MemberExpression: function(M) {
+            if (M.property.type === "PrivateIdentifier") {
+                return new AST_DotHash({
+                    start      : my_start_token(M),
+                    end        : my_end_token(M),
+                    property   : M.property.name,
+                    expression : from_moz(M.object),
+                    optional   : M.optional || false
+                });
+            }
+            return new (M.computed ? AST_Sub : AST_Dot)({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                property   : M.computed ? from_moz(M.property) : M.property.name,
+                expression : from_moz(M.object),
+                optional   : M.optional || false
+            });
+        },
+
+        ChainExpression: function(M) {
+            return new AST_Chain({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                expression : from_moz(M.expression)
+            });
+        },
+
+        SwitchCase: function(M) {
+            return new (M.test ? AST_Case : AST_Default)({
+                start      : my_start_token(M),
+                end        : my_end_token(M),
+                expression : from_moz(M.test),
+                body       : M.consequent.map(from_moz)
+            });
+        },
+
+        VariableDeclaration: function(M) {
+            let decl_type;
+            let defs_type = AST_VarDef;
+            let sym_type;
+            let await_using = false;
+            if (M.kind === "const") {
+                decl_type = AST_Const;
+                sym_type = AST_SymbolConst;
+            } else if (M.kind === "let") {
+                decl_type = AST_Let;
+                sym_type = AST_SymbolLet;
+            } else if (M.kind === "using") {
+                decl_type = AST_Using;
+                defs_type = AST_UsingDef;
+                sym_type = AST_SymbolUsing;
+            } else if (M.kind === "await using") {
+                decl_type = AST_Using;
+                defs_type = AST_UsingDef;
+                sym_type = AST_SymbolUsing;
+                await_using = true;
+            } else {
+                decl_type = AST_Var;
+                sym_type = AST_SymbolVar;
+            }
+            const definitions = M.declarations.map(M => {
+                return new defs_type({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    name: from_moz_pattern(M.id, sym_type),
+                    value: from_moz(M.init),
+                });
+            });
+            return new decl_type({
+                start       : my_start_token(M),
+                end         : my_end_token(M),
+                definitions : definitions,
+                await       : await_using,
+            });
+        },
+
+        ImportDeclaration: function(M) {
+            var imported_name = null;
+            var imported_names = null;
+            M.specifiers.forEach(function (specifier) {
+                if (specifier.type === "ImportSpecifier" || specifier.type === "ImportNamespaceSpecifier") {
+                    if (!imported_names) { imported_names = []; }
+                    imported_names.push(from_moz(specifier));
+                } else if (specifier.type === "ImportDefaultSpecifier") {
+                    imported_name = from_moz(specifier);
+                }
+            });
+            return new AST_Import({
+                start       : my_start_token(M),
+                end         : my_end_token(M),
+                imported_name: imported_name,
+                imported_names : imported_names,
+                module_name : from_moz(M.source),
+                attributes: import_attributes_from_moz(M.attributes || M.assertions),
+                phase: M.phase || null
+            });
+        },
+
+        ImportSpecifier: function(M) {
+            return new AST_NameMapping({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                foreign_name: from_moz_symbol(AST_SymbolImportForeign, M.imported, M.imported.type === "Literal"),
+                name: from_moz_symbol(AST_SymbolImport, M.local)
+            });
+        },
+
+        ImportDefaultSpecifier: function(M) {
+            return from_moz_symbol(AST_SymbolImport, M.local);
+        },
+
+        ImportNamespaceSpecifier: function(M) {
+            return new AST_NameMapping({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                foreign_name: new AST_SymbolImportForeign({ name: "*" }),
+                name: from_moz_symbol(AST_SymbolImport, M.local)
+            });
+        },
+
+        ImportExpression: function(M) {
+            const args = [from_moz(M.source)];
+            if (M.options) {
+                args.push(from_moz(M.options));
+            }
+            if (M.phase) {
+                return new AST_DynamicImport({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    phase: M.phase,
+                    args: args
+                });
+            }
+            return new AST_Call({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz({
+                    type: "Identifier",
+                    name: "import"
+                }),
+                optional: false,
+                args
+            });
+        },
+
+        ExportAllDeclaration: function(M) {
+            var foreign_name = M.exported == null ?
+                new AST_SymbolExportForeign({ name: "*" }) :
+                from_moz_symbol(AST_SymbolExportForeign, M.exported, M.exported.type === "Literal");
+            return new AST_Export({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                exported_names: [
+                    new AST_NameMapping({
+                        start: my_start_token(M),
+                        end: my_end_token(M),
+                        name: new AST_SymbolExport({ name: "*" }),
+                        foreign_name: foreign_name
+                    })
+                ],
+                module_name: from_moz(M.source),
+                attributes: import_attributes_from_moz(M.attributes || M.assertions)
+            });
+        },
+
+        ExportNamedDeclaration: function(M) {
+            if (M.declaration) {
+                // export const, export function, ...
+                return new AST_Export({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    exported_definition: from_moz(M.declaration),
+                    exported_names: null,
+                    module_name: null,
+                    attributes: null,
+                });
+            } else {
+                return new AST_Export({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    exported_definition: null,
+                    exported_names: M.specifiers && M.specifiers.length ? M.specifiers.map(from_moz) : [],
+                    module_name: from_moz(M.source),
+                    attributes: import_attributes_from_moz(M.attributes || M.assertions),
+                });
+            }
+        },
+
+        ExportDefaultDeclaration: function(M) {
+            return new AST_Export({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                exported_value: from_moz(M.declaration),
+                is_default: true
+            });
+        },
+
+        ExportSpecifier: function(M) {
+            return new AST_NameMapping({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                foreign_name: from_moz_symbol(AST_SymbolExportForeign, M.exported, M.exported.type === "Literal"),
+                name: from_moz_symbol(AST_SymbolExport, M.local, M.local.type === "Literal"),
+            });
+        },
+
+        Literal: function(M) {
+            var val = M.value, args = {
+                start  : my_start_token(M),
+                end    : my_end_token(M)
+            };
+            var rx = M.regex;
+            if (rx && rx.pattern) {
+                // RegExpLiteral as per ESTree AST spec
+                args.value = {
+                    source: rx.pattern,
+                    flags: rx.flags
+                };
+                return new AST_RegExp(args);
+            } else if (rx) {
+                // support legacy RegExp
+                const rx_source = M.raw || val;
+                const match = rx_source.match(/^\/(.*)\/(\w*)$/);
+                if (!match) throw new Error("Invalid regex source " + rx_source);
+                const [_, source, flags] = match;
+                args.value = { source, flags };
+                return new AST_RegExp(args);
+            }
+            const bi = typeof M.value === "bigint" ? M.value.toString() : M.bigint;
+            if (typeof bi === "string") {
+                args.value = bi;
+                args.raw = M.raw;
+                return new AST_BigInt(args);
+            }
+            if (val === null) return new AST_Null(args);
+            switch (typeof val) {
+              case "string":
+                args.quote = "\"";
+                args.value = val;
+                return new AST_String(args);
+              case "number":
+                args.value = val;
+                args.raw = M.raw || val.toString();
+                return new AST_Number(args);
+              case "boolean":
+                return new (val ? AST_True : AST_False)(args);
+            }
+        },
+
+        MetaProperty: function(M) {
+            if (M.meta.name === "new" && M.property.name === "target") {
+                return new AST_NewTarget({
+                    start: my_start_token(M),
+                    end: my_end_token(M)
+                });
+            } else if (M.meta.name === "import" && M.property.name === "meta") {
+                return new AST_ImportMeta({
+                    start: my_start_token(M),
+                    end: my_end_token(M)
+                });
+            }
+        },
+
+        Identifier: function(M) {
+            return new AST_SymbolRef({
+                start : my_start_token(M),
+                end   : my_end_token(M),
+                name  : M.name
+            });
+        },
+
+        EmptyStatement: function(M) {
+            return new AST_EmptyStatement({
+                start: my_start_token(M),
+                end: my_end_token(M)
+            });
+        },
+
+        BlockStatement: function(M) {
+            return new AST_BlockStatement({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                body: M.body.map(from_moz)
+            });
+        },
+
+        IfStatement: function(M) {
+            return new AST_If({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                condition: from_moz(M.test),
+                body: from_moz(M.consequent),
+                alternative: from_moz(M.alternate)
+            });
+        },
+
+        LabeledStatement: function(M) {
+            try {
+                const label = from_moz_symbol(AST_Label, M.label);
+                FROM_MOZ_LABELS.push(label);
+
+                const stat = new AST_LabeledStatement({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    label,
+                    body: from_moz(M.body)
+                });
+
+                return stat;
+            } finally {
+                FROM_MOZ_LABELS.pop();
+            }
+        },
+
+        BreakStatement: function(M) {
+            return new AST_Break({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                label: from_moz_label_ref(M.label),
+            });
+        },
+
+        ContinueStatement: function(M) {
+            return new AST_Continue({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                label: from_moz_label_ref(M.label),
+            });
+        },
+
+        WithStatement: function(M) {
+            return new AST_With({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.object),
+                body: from_moz(M.body)
+            });
+        },
+
+        SwitchStatement: function(M) {
+            return new AST_Switch({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.discriminant),
+                body: M.cases.map(from_moz)
+            });
+        },
+
+        ReturnStatement: function(M) {
+            return new AST_Return({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                value: from_moz(M.argument)
+            });
+        },
+
+        ThrowStatement: function(M) {
+            return new AST_Throw({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                value: from_moz(M.argument)
+            });
+        },
+
+        WhileStatement: function(M) {
+            return new AST_While({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                condition: from_moz(M.test),
+                body: from_moz(M.body)
+            });
+        },
+
+        DoWhileStatement: function(M) {
+            return new AST_Do({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                condition: from_moz(M.test),
+                body: from_moz(M.body)
+            });
+        },
+
+        ForStatement: function(M) {
+            return new AST_For({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                init: from_moz(M.init),
+                condition: from_moz(M.test),
+                step: from_moz(M.update),
+                body: from_moz(M.body)
+            });
+        },
+
+        ForInStatement: function(M) {
+            return new AST_ForIn({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                init: from_moz(M.left),
+                object: from_moz(M.right),
+                body: from_moz(M.body)
+            });
+        },
+
+        ForOfStatement: function(M) {
+            return new AST_ForOf({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                init: from_moz(M.left),
+                object: from_moz(M.right),
+                body: from_moz(M.body),
+                await: M.await
+            });
+        },
+
+        AwaitExpression: function(M) {
+            return new AST_Await({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.argument)
+            });
+        },
+
+        YieldExpression: function(M) {
+            return new AST_Yield({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.argument),
+                is_star: M.delegate
+            });
+        },
+
+        DebuggerStatement: function(M) {
+            return new AST_Debugger({
+                start: my_start_token(M),
+                end: my_end_token(M)
+            });
+        },
+
+        CatchClause: function(M) {
+            return new AST_Catch({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                argname: M.param ? from_moz_pattern(M.param, AST_SymbolCatch) : null,
+                body: from_moz(M.body).body
+            });
+        },
+
+        ThisExpression: function(M) {
+            return new AST_This({
+                start: my_start_token(M),
+                name: "this",
+                end: my_end_token(M)
+            });
+        },
+
+        Super: function(M) {
+            return new AST_Super({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                name: "super",
+            });
+        },
+
+        BinaryExpression: function(M) {
+            if (M.left.type === "PrivateIdentifier") {
+                return new AST_PrivateIn({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    key: new AST_SymbolPrivateProperty({
+                        start: my_start_token(M.left),
+                        end: my_end_token(M.left),
+                        name: M.left.name
+                    }),
+                    value: from_moz(M.right),
+                });
+            }
+            return new AST_Binary({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                operator: M.operator,
+                left: from_moz(M.left),
+                right: from_moz(M.right)
+            });
+        },
+
+        LogicalExpression: function(M) {
+            return new AST_Binary({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                operator: M.operator,
+                left: from_moz(M.left),
+                right: from_moz(M.right)
+            });
+        },
+
+        AssignmentExpression: function(M) {
+            return new AST_Assign({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                operator: M.operator,
+                logical: M.operator === "??=" || M.operator === "&&=" || M.operator === "||=",
+                left: from_moz(M.left),
+                right: from_moz(M.right)
+            });
+        },
+
+        ConditionalExpression: function(M) {
+            return new AST_Conditional({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                condition: from_moz(M.test),
+                consequent: from_moz(M.consequent),
+                alternative: from_moz(M.alternate)
+            });
+        },
+
+        NewExpression: function(M) {
+            return new AST_New({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.callee),
+                args: M.arguments.map(from_moz)
+            });
+        },
+
+        CallExpression: function(M) {
+            return new AST_Call({
+                start: my_start_token(M),
+                end: my_end_token(M),
+                expression: from_moz(M.callee),
+                optional: M.optional,
+                args: M.arguments.map(from_moz)
+            });
+        }
+    };
+
+    MOZ_TO_ME.UpdateExpression =
+    MOZ_TO_ME.UnaryExpression = function To_Moz_Unary(M) {
+        var prefix = "prefix" in M ? M.prefix
+            : M.type == "UnaryExpression" ? true : false;
+        return new (prefix ? AST_UnaryPrefix : AST_UnaryPostfix)({
+            start      : my_start_token(M),
+            end        : my_end_token(M),
+            operator   : M.operator,
+            expression : from_moz(M.argument)
+        });
+    };
+
+    MOZ_TO_ME.ClassDeclaration =
+    MOZ_TO_ME.ClassExpression = function From_Moz_Class(M) {
+        return new (M.type === "ClassDeclaration" ? AST_DefClass : AST_ClassExpression)({
+            start    : my_start_token(M),
+            end      : my_end_token(M),
+            name     : M.id && from_moz_symbol(M.type === "ClassDeclaration" ? AST_SymbolDefClass : AST_SymbolClass, M.id),
+            extends  : from_moz(M.superClass),
+            properties: M.body.body.map(from_moz)
+        });
+    };
+
+    def_to_moz(AST_EmptyStatement, function To_Moz_EmptyStatement() {
+        return {
+            type: "EmptyStatement"
+        };
+    });
+    def_to_moz(AST_BlockStatement, function To_Moz_BlockStatement(M) {
+        return {
+            type: "BlockStatement",
+            body: M.body.map(to_moz)
+        };
+    });
+    def_to_moz(AST_If, function To_Moz_IfStatement(M) {
+        return {
+            type: "IfStatement",
+            test: to_moz(M.condition),
+            consequent: to_moz(M.body),
+            alternate: to_moz(M.alternative)
+        };
+    });
+    def_to_moz(AST_LabeledStatement, function To_Moz_LabeledStatement(M) {
+        return {
+            type: "LabeledStatement",
+            label: to_moz(M.label),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_Break, function To_Moz_BreakStatement(M) {
+        return {
+            type: "BreakStatement",
+            label: to_moz(M.label)
+        };
+    });
+    def_to_moz(AST_Continue, function To_Moz_ContinueStatement(M) {
+        return {
+            type: "ContinueStatement",
+            label: to_moz(M.label)
+        };
+    });
+    def_to_moz(AST_With, function To_Moz_WithStatement(M) {
+        return {
+            type: "WithStatement",
+            object: to_moz(M.expression),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_Switch, function To_Moz_SwitchStatement(M) {
+        return {
+            type: "SwitchStatement",
+            discriminant: to_moz(M.expression),
+            cases: M.body.map(to_moz)
+        };
+    });
+    def_to_moz(AST_Return, function To_Moz_ReturnStatement(M) {
+        return {
+            type: "ReturnStatement",
+            argument: to_moz(M.value)
+        };
+    });
+    def_to_moz(AST_Throw, function To_Moz_ThrowStatement(M) {
+        return {
+            type: "ThrowStatement",
+            argument: to_moz(M.value)
+        };
+    });
+    def_to_moz(AST_While, function To_Moz_WhileStatement(M) {
+        return {
+            type: "WhileStatement",
+            test: to_moz(M.condition),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_Do, function To_Moz_DoWhileStatement(M) {
+        return {
+            type: "DoWhileStatement",
+            test: to_moz(M.condition),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_For, function To_Moz_ForStatement(M) {
+        return {
+            type: "ForStatement",
+            init: to_moz(M.init),
+            test: to_moz(M.condition),
+            update: to_moz(M.step),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_ForIn, function To_Moz_ForInStatement(M) {
+        return {
+            type: "ForInStatement",
+            left: to_moz(M.init),
+            right: to_moz(M.object),
+            body: to_moz(M.body)
+        };
+    });
+    def_to_moz(AST_ForOf, function To_Moz_ForOfStatement(M) {
+        return {
+            type: "ForOfStatement",
+            left: to_moz(M.init),
+            right: to_moz(M.object),
+            body: to_moz(M.body),
+            await: M.await
+        };
+    });
+    def_to_moz(AST_Await, function To_Moz_AwaitExpression(M) {
+        return {
+            type: "AwaitExpression",
+            argument: to_moz(M.expression)
+        };
+    });
+    def_to_moz(AST_Yield, function To_Moz_YieldExpression(M) {
+        return {
+            type: "YieldExpression",
+            argument: to_moz(M.expression),
+            delegate: M.is_star
+        };
+    });
+    def_to_moz(AST_Debugger, function To_Moz_DebuggerStatement() {
+        return {
+            type: "DebuggerStatement"
+        };
+    });
+    def_to_moz(AST_VarDefLike, function To_Moz_VariableDeclarator(M) {
+        return {
+            type: "VariableDeclarator",
+            id: to_moz(M.name),
+            init: to_moz(M.value)
+        };
+    });
+
+    def_to_moz(AST_This, function To_Moz_ThisExpression() {
+        return {
+            type: "ThisExpression"
+        };
+    });
+    def_to_moz(AST_Super, function To_Moz_Super() {
+        return {
+            type: "Super"
+        };
+    });
+    def_to_moz(AST_Conditional, function To_Moz_ConditionalExpression(M) {
+        return {
+            type: "ConditionalExpression",
+            test: to_moz(M.condition),
+            consequent: to_moz(M.consequent),
+            alternate: to_moz(M.alternative)
+        };
+    });
+    def_to_moz(AST_New, function To_Moz_NewExpression(M) {
+        return {
+            type: "NewExpression",
+            callee: to_moz(M.expression),
+            arguments: M.args.map(to_moz)
+        };
+    });
+    def_to_moz(AST_Call, function To_Moz_CallExpression(M) {
+        if (M.expression instanceof AST_SymbolRef && M.expression.name === "import") {
+            const [source, options] = M.args.map(to_moz);
+            return {
+                type: "ImportExpression",
+                source,
+                options: options || null
+            };
+        }
+
+        return {
+            type: "CallExpression",
+            callee: to_moz(M.expression),
+            optional: M.optional,
+            arguments: M.args.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_DynamicImport, function To_Moz_ImportExpression(M) {
+        const [source, options] = M.args.map(to_moz);
+        return {
+            type: "ImportExpression",
+            source,
+            options: options || null,
+            phase: M.phase
+        };
+    });
+
+    def_to_moz(AST_Toplevel, function To_Moz_Program(M) {
+        return to_moz_scope("Program", M);
+    });
+
+    def_to_moz(AST_Expansion, function To_Moz_Spread(M) {
+        return {
+            type: to_moz_in_destructuring() ? "RestElement" : "SpreadElement",
+            argument: to_moz(M.expression)
+        };
+    });
+
+    def_to_moz(AST_PrefixedTemplateString, function To_Moz_TaggedTemplateExpression(M) {
+        return {
+            type: "TaggedTemplateExpression",
+            tag: to_moz(M.prefix),
+            quasi: to_moz(M.template_string)
+        };
+    });
+
+    def_to_moz(AST_TemplateString, function To_Moz_TemplateLiteral(M) {
+        var quasis = [];
+        var expressions = [];
+        for (var i = 0; i < M.segments.length; i++) {
+            if (i % 2 !== 0) {
+                expressions.push(to_moz(M.segments[i]));
+            } else {
+                quasis.push({
+                    type: "TemplateElement",
+                    value: {
+                        raw: M.segments[i].raw,
+                        cooked: M.segments[i].value
+                    },
+                    tail: i === M.segments.length - 1
+                });
+            }
+        }
+        return {
+            type: "TemplateLiteral",
+            quasis: quasis,
+            expressions: expressions
+        };
+    });
+
+    def_to_moz(AST_Defun, function To_Moz_FunctionDeclaration(M) {
+        return {
+            type: "FunctionDeclaration",
+            id: to_moz(M.name),
+            params: M.argnames.map(to_moz_pattern),
+            generator: M.is_generator,
+            async: M.async,
+            body: to_moz_scope("BlockStatement", M)
+        };
+    });
+
+    def_to_moz(AST_Function, function To_Moz_FunctionExpression(M) {
+        return {
+            type: "FunctionExpression",
+            id: to_moz(M.name),
+            params: M.argnames.map(to_moz_pattern),
+            generator: M.is_generator || false,
+            async: M.async || false,
+            body: to_moz_scope("BlockStatement", M)
+        };
+    });
+
+    def_to_moz(AST_Arrow, function To_Moz_ArrowFunctionExpression(M) {
+        var body = M.body.length === 1 && M.body[0] instanceof AST_Return && M.body[0].value
+            ? to_moz(M.body[0].value)
+            : {
+                type: "BlockStatement",
+                body: M.body.map(to_moz)
+            };
+        return {
+            type: "ArrowFunctionExpression",
+            params: M.argnames.map(to_moz_pattern),
+            async: M.async,
+            body: body,
+        };
+    });
+
+    def_to_moz(AST_Destructuring, function To_Moz_ObjectPattern(M) {
+        if (M.is_array) {
+            return {
+                type: "ArrayPattern",
+                elements: M.names.map(
+                    M => M instanceof AST_Hole ? null : to_moz_pattern(M)
+                ),
+            };
+        }
+        return {
+            type: "ObjectPattern",
+            properties: M.names.map(M => {
+                if (M instanceof AST_ObjectKeyVal) {
+                    var computed = M.computed_key();
+                    const [shorthand, key] = to_moz_property_key(M.key, computed, M.quote, M.value);
+
+                    return {
+                        type: "Property",
+                        computed,
+                        kind: "init",
+                        key: key,
+                        method: false,
+                        shorthand,
+                        value: to_moz_pattern(M.value)
+                    };
+                } else {
+                    return to_moz_pattern(M);
+                }
+            }),
+        };
+    });
+
+    def_to_moz(AST_DefaultAssign, function To_Moz_AssignmentExpression(M) {
+        return {
+            type: "AssignmentPattern",
+            left: to_moz_pattern(M.left),
+            right: to_moz(M.right),
+        };
+    });
+
+    def_to_moz(AST_Directive, function To_Moz_Directive(M) {
+        return {
+            type: "ExpressionStatement",
+            expression: {
+                type: "Literal",
+                value: M.value,
+                raw: M.print_to_string()
+            },
+            directive: M.value
+        };
+    });
+
+    def_to_moz(AST_SimpleStatement, function To_Moz_ExpressionStatement(M) {
+        return {
+            type: "ExpressionStatement",
+            expression: to_moz(M.body)
+        };
+    });
+
+    def_to_moz(AST_SwitchBranch, function To_Moz_SwitchCase(M) {
+        return {
+            type: "SwitchCase",
+            test: to_moz(M.expression),
+            consequent: M.body.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_Try, function To_Moz_TryStatement(M) {
+        return {
+            type: "TryStatement",
+            block: to_moz_block(M.body),
+            handler: to_moz(M.bcatch),
+            guardedHandlers: [],
+            finalizer: to_moz(M.bfinally)
+        };
+    });
+
+    def_to_moz(AST_Catch, function To_Moz_CatchClause(M) {
+        return {
+            type: "CatchClause",
+            param: M.argname != null ? to_moz_pattern(M.argname) : null,
+            body: to_moz_block(M)
+        };
+    });
+
+    def_to_moz(AST_DefinitionsLike, function To_Moz_VariableDeclaration(M) {
+        return {
+            type: "VariableDeclaration",
+            kind:
+                M instanceof AST_Const ? "const" :
+                M instanceof AST_Let ? "let" :
+                M instanceof AST_Using ? (M.await ? "await using" : "using") :
+                "var",
+            declarations: M.definitions.map(to_moz)
+        };
+    });
+
+    function import_attributes_to_moz(attribute) {
+        const import_attributes = [];
+        if (attribute) {
+            for (const { key, value } of attribute.properties) {
+                const key_moz = is_basic_identifier_string(key)
+                    ? { type: "Identifier", name: key }
+                    : { type: "Literal", value: key, raw: JSON.stringify(key) };
+                import_attributes.push({
+                    type: "ImportAttribute",
+                    key: key_moz,
+                    value: to_moz(value)
+                });
+            }
+        }
+        return import_attributes;
+    }
+
+    def_to_moz(AST_Export, function To_Moz_ExportDeclaration(M) {
+        if (M.exported_names) {
+            var first_exported = M.exported_names[0];
+            if (first_exported && first_exported.name.name === "*" && !first_exported.name.quote) {
+                var foreign_name = first_exported.foreign_name;
+                var exported = foreign_name.name === "*" && !foreign_name.quote
+                    ? null
+                    : to_moz(foreign_name);
+                return {
+                    type: "ExportAllDeclaration",
+                    source: to_moz(M.module_name),
+                    exported: exported,
+                    attributes: import_attributes_to_moz(M.attributes)
+                };
+            }
+            return {
+                type: "ExportNamedDeclaration",
+                specifiers: M.exported_names.map(function (name_mapping) {
+                    return {
+                        type: "ExportSpecifier",
+                        exported: to_moz(name_mapping.foreign_name),
+                        local: to_moz(name_mapping.name)
+                    };
+                }),
+                declaration: to_moz(M.exported_definition),
+                source: to_moz(M.module_name),
+                attributes: import_attributes_to_moz(M.attributes)
+            };
+        }
+
+        if (M.is_default) {
+            return {
+                type: "ExportDefaultDeclaration",
+                declaration: to_moz(M.exported_value || M.exported_definition),
+            };
+        } else {
+            return {
+                type: "ExportNamedDeclaration",
+                declaration: to_moz(M.exported_value || M.exported_definition),
+                specifiers: [],
+                source: null,
+            };
+        }
+    });
+
+    def_to_moz(AST_Import, function To_Moz_ImportDeclaration(M) {
+        var specifiers = [];
+        if (M.imported_name) {
+            specifiers.push({
+                type: "ImportDefaultSpecifier",
+                local: to_moz(M.imported_name)
+            });
+        }
+        if (M.imported_names) {
+            var first_imported_foreign_name = M.imported_names[0].foreign_name;
+            if (first_imported_foreign_name.name === "*" && !first_imported_foreign_name.quote) {
+                specifiers.push({
+                    type: "ImportNamespaceSpecifier",
+                    local: to_moz(M.imported_names[0].name)
+                });
+            } else {
+                M.imported_names.forEach(function(name_mapping) {
+                    specifiers.push({
+                        type: "ImportSpecifier",
+                        local: to_moz(name_mapping.name),
+                        imported: to_moz(name_mapping.foreign_name)
+                    });
+                });
+            }
+        }
+        var moz = {
+            type: "ImportDeclaration",
+            specifiers: specifiers,
+            source: to_moz(M.module_name),
+            attributes: import_attributes_to_moz(M.attributes)
+        };
+        if (M.phase) moz.phase = M.phase;
+        return moz;
+    });
+
+    def_to_moz(AST_ImportMeta, function To_Moz_MetaProperty() {
+        return {
+            type: "MetaProperty",
+            meta: {
+                type: "Identifier",
+                name: "import"
+            },
+            property: {
+                type: "Identifier",
+                name: "meta"
+            }
+        };
+    });
+
+    def_to_moz(AST_Sequence, function To_Moz_SequenceExpression(M) {
+        return {
+            type: "SequenceExpression",
+            expressions: M.expressions.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_DotHash, function To_Moz_PrivateMemberExpression(M) {
+        return {
+            type: "MemberExpression",
+            object: to_moz(M.expression),
+            computed: false,
+            property: {
+                type: "PrivateIdentifier",
+                name: M.property
+            },
+            optional: M.optional
+        };
+    });
+
+    def_to_moz(AST_PropAccess, function To_Moz_MemberExpression(M) {
+        var isComputed = M instanceof AST_Sub;
+        return {
+            type: "MemberExpression",
+            object: to_moz(M.expression),
+            computed: isComputed,
+            property: isComputed ? to_moz(M.property) : {type: "Identifier", name: M.property},
+            optional: M.optional
+        };
+    });
+
+    def_to_moz(AST_Chain, function To_Moz_ChainExpression(M) {
+        return {
+            type: "ChainExpression",
+            expression: to_moz(M.expression)
+        };
+    });
+
+    def_to_moz(AST_Unary, function To_Moz_Unary(M) {
+        return {
+            type: M.operator == "++" || M.operator == "--" ? "UpdateExpression" : "UnaryExpression",
+            operator: M.operator,
+            prefix: M instanceof AST_UnaryPrefix,
+            argument: to_moz(M.expression)
+        };
+    });
+
+    def_to_moz(AST_Binary, function To_Moz_BinaryExpression(M) {
+        if (M.operator == "=" && to_moz_in_destructuring()) {
+            return {
+                type: "AssignmentPattern",
+                left: to_moz(M.left),
+                right: to_moz(M.right)
+            };
+        }
+
+        const type = M.operator == "&&" || M.operator == "||" || M.operator === "??"
+            ? "LogicalExpression"
+            : "BinaryExpression";
+
+        return {
+            type,
+            left: to_moz(M.left),
+            operator: M.operator,
+            right: to_moz(M.right)
+        };
+    });
+
+    def_to_moz(AST_Assign, function To_Moz_AssignmentExpression(M) {
+        return {
+            type: "AssignmentExpression",
+            operator: M.operator,
+            left: to_moz(M.left),
+            right: to_moz(M.right)
+        };
+    });
+
+    def_to_moz(AST_PrivateIn, function To_Moz_BinaryExpression_PrivateIn(M) {
+        return {
+            type: "BinaryExpression",
+            left: { type: "PrivateIdentifier", name: M.key.name },
+            operator: "in",
+            right: to_moz(M.value),
+        };
+    });
+
+    def_to_moz(AST_Array, function To_Moz_ArrayExpression(M) {
+        return {
+            type: "ArrayExpression",
+            elements: M.elements.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_Object, function To_Moz_ObjectExpression(M) {
+        return {
+            type: "ObjectExpression",
+            properties: M.properties.map(to_moz)
+        };
+    });
+
+    def_to_moz(AST_ObjectProperty, function To_Moz_Property(M, parent) {
+        var computed = M.computed_key();
+        const [shorthand, key] = to_moz_property_key(M.key, computed, M.quote, M.value);
+
+        var kind;
+        if (M instanceof AST_ObjectGetter) {
+            kind = "get";
+        } else
+        if (M instanceof AST_ObjectSetter) {
+            kind = "set";
+        }
+        if (M instanceof AST_PrivateGetter || M instanceof AST_PrivateSetter) {
+            const kind = M instanceof AST_PrivateGetter ? "get" : "set";
+            return {
+                type: "MethodDefinition",
+                computed: false,
+                kind: kind,
+                static: M.static,
+                key: {
+                    type: "PrivateIdentifier",
+                    name: M.key.name
+                },
+                value: to_moz(M.value)
+            };
+        }
+        if (M instanceof AST_ClassPrivateProperty) {
+            return {
+                type: "PropertyDefinition",
+                key: {
+                    type: "PrivateIdentifier",
+                    name: M.key.name
+                },
+                value: to_moz(M.value),
+                computed: false,
+                static: M.static
+            };
+        }
+        if (M instanceof AST_ClassProperty) {
+            return {
+                type: "PropertyDefinition",
+                key,
+                value: to_moz(M.value),
+                computed,
+                static: M.static
+            };
+        }
+        if (parent instanceof AST_Class) {
+            return {
+                type: "MethodDefinition",
+                computed: computed,
+                kind: kind,
+                static: M.static,
+                key: to_moz(M.key),
+                value: to_moz(M.value)
+            };
+        }
+        return {
+            type: "Property",
+            computed: computed,
+            method: false,
+            shorthand,
+            kind: kind,
+            key: key,
+            value: to_moz(M.value)
+        };
+    });
+
+    def_to_moz(AST_ObjectKeyVal, function To_Moz_Property(M) {
+        var computed = M.computed_key();
+        const [shorthand, key] = to_moz_property_key(M.key, computed, M.quote, M.value);
+
+        return {
+            type: "Property",
+            computed: computed,
+            shorthand: shorthand,
+            method: false,
+            kind: "init",
+            key: key,
+            value: to_moz(M.value)
+        };
+    });
+
+    def_to_moz(AST_ConciseMethod, function To_Moz_MethodDefinition(M, parent) {
+        const computed = M.computed_key();
+        const [_always_false, key] = to_moz_property_key(M.key, computed, M.quote, M.value);
+
+        if (parent instanceof AST_Object) {
+            return {
+                type: "Property",
+                kind: "init",
+                computed,
+                method: true,
+                shorthand: false,
+                key,
+                value: to_moz(M.value),
+            };
+        }
+
+        return {
+            type: "MethodDefinition",
+            kind: !computed && M.key.name === "constructor" ? "constructor" : "method",
+            computed,
+            key,
+            value: to_moz(M.value),
+            static: M.static,
+        };
+    });
+
+    def_to_moz(AST_PrivateMethod, function To_Moz_MethodDefinition(M) {
+        return {
+            type: "MethodDefinition",
+            kind: "method",
+            key: { type: "PrivateIdentifier", name: M.key.name },
+            value: to_moz(M.value),
+            computed: false,
+            static: M.static,
+        };
+    });
+
+    def_to_moz(AST_Class, function To_Moz_Class(M) {
+        var type = M instanceof AST_ClassExpression ? "ClassExpression" : "ClassDeclaration";
+        return {
+            type: type,
+            superClass: to_moz(M.extends),
+            id: M.name ? to_moz(M.name) : null,
+            body: {
+                type: "ClassBody",
+                body: M.properties.map(to_moz)
+            }
+        };
+    });
+
+    def_to_moz(AST_ClassStaticBlock, function To_Moz_StaticBlock(M) {
+        return {
+            type: "StaticBlock",
+            body: M.body.map(to_moz),
+        };
+    });
+
+    def_to_moz(AST_NewTarget, function To_Moz_MetaProperty() {
+        return {
+            type: "MetaProperty",
+            meta: {
+                type: "Identifier",
+                name: "new"
+            },
+            property: {
+                type: "Identifier",
+                name: "target"
+            }
+        };
+    });
+
+    def_to_moz(AST_Symbol, function To_Moz_Identifier(M, parent) {
+        if (
+            (M instanceof AST_SymbolMethod && parent.quote) ||
+            ((
+                M instanceof AST_SymbolImportForeign ||
+                M instanceof AST_SymbolExportForeign ||
+                M instanceof AST_SymbolExport
+                ) && M.quote)
+         ) {
+            return {
+                type: "Literal",
+                value: M.name
+            };
+        }
+        var def = M.definition();
+        return {
+            type: "Identifier",
+            name: def ? def.mangled_name || def.name : M.name
+        };
+    });
+
+    def_to_moz(AST_RegExp, function To_Moz_RegExpLiteral(M) {
+        const pattern = M.value.source;
+        const flags = M.value.flags;
+        return {
+            type: "Literal",
+            value: null,
+            raw: M.print_to_string(),
+            regex: { pattern, flags }
+        };
+    });
+
+    def_to_moz(AST_Constant, function To_Moz_Literal(M) {
+        var value = M.value;
+        return {
+            type: "Literal",
+            value: value,
+            raw: M.raw || M.print_to_string()
+        };
+    });
+
+    def_to_moz(AST_Atom, function To_Moz_Atom(M) {
+        return {
+            type: "Identifier",
+            name: String(M.value)
+        };
+    });
+
+    def_to_moz(AST_BigInt, M => ({
+        type: "Literal",
+        // value cannot be represented natively
+        // see: https://github.com/estree/estree/blob/master/es2020.md#bigintliteral
+        value: null,
+        // `M.value` is a string that may be a hex number representation.
+        // but "bigint" property should have only decimal digits
+        bigint: typeof BigInt === "function" ? BigInt(M.value).toString() : M.value,
+        raw: M.raw,
+    }));
+
+    AST_Boolean.DEFMETHOD("to_mozilla_ast", AST_Constant.prototype.to_mozilla_ast);
+    AST_Null.DEFMETHOD("to_mozilla_ast", AST_Constant.prototype.to_mozilla_ast);
+    AST_Hole.DEFMETHOD("to_mozilla_ast", function To_Moz_ArrayHole() { return null; });
+
+    AST_Block.DEFMETHOD("to_mozilla_ast", AST_BlockStatement.prototype.to_mozilla_ast);
+    AST_Lambda.DEFMETHOD("to_mozilla_ast", AST_Function.prototype.to_mozilla_ast);
+
+    /* -----[ tools ]----- */
+
+    function my_start_token(moznode) {
+        var loc = moznode.loc, start = loc && loc.start;
+        var range = moznode.range;
+        return new AST_Token(
+            "",
+            "",
+            start && start.line || 0,
+            start && start.column || 0,
+            range ? range [0] : moznode.start,
+            false,
+            [],
+            [],
+            loc && loc.source,
+        );
+    }
+
+    function my_end_token(moznode) {
+        var loc = moznode.loc, end = loc && loc.end;
+        var range = moznode.range;
+        return new AST_Token(
+            "",
+            "",
+            end && end.line || 0,
+            end && end.column || 0,
+            range ? range [0] : moznode.end,
+            false,
+            [],
+            [],
+            loc && loc.source,
+        );
+    }
+
+    var FROM_MOZ_LABELS = null;
+
+    function from_moz(node) {
+        if (node == null) return null;
+        return MOZ_TO_ME[node.type](node);
+    }
+
+    function from_moz_quote(moz_key, computed) {
+        if (!computed && moz_key.type === "Literal" && typeof moz_key.value === "string") {
+            return '"';
+        } else {
+            return "";
+        }
+    }
+
+    function from_moz_symbol(symbol_type, M, has_quote) {
+        return new symbol_type({
+            start: my_start_token(M),
+            quote: has_quote ? '"' : undefined,
+            name: M.type === "Identifier" ? M.name : String(M.value),
+            end: my_end_token(M),
+        });
+    }
+
+    function from_moz_lambda(M, is_method) {
+        return new (is_method ? AST_Accessor : AST_Function)({
+            start: my_start_token(M),
+            end: my_end_token(M),
+            name: M.id && from_moz_symbol(is_method ? AST_SymbolMethod : AST_SymbolLambda, M.id),
+            argnames: M.params.map(M => from_moz_pattern(M, AST_SymbolFunarg)),
+            is_generator: M.generator,
+            async: M.async,
+            body: normalize_directives(from_moz(M.body).body)
+        });
+    }
+
+    function from_moz_pattern(M, sym_type) {
+        switch (M.type) {
+            case "ObjectPattern":
+                return new AST_Destructuring({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    names: M.properties.map(p => from_moz_pattern(p, sym_type)),
+                    is_array: false
+                });
+
+            case "Property":
+                var key = M.key;
+                var args = {
+                    start    : my_start_token(key || M.value),
+                    end      : my_end_token(M.value),
+                    key      : key.type == "Identifier" ? key.name : String(key.value),
+                    quote    : !M.computed && key.type === "Literal" && typeof key.value === "string"
+                                ? '"'
+                                : "",
+                    value    : from_moz_pattern(M.value, sym_type)
+                };
+                if (M.computed) {
+                    args.key = from_moz(M.key);
+                }
+                return new AST_ObjectKeyVal(args);
+
+            case "ArrayPattern":
+                return new AST_Destructuring({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    names: M.elements.map(function(elm) {
+                        if (elm === null) {
+                            return new AST_Hole();
+                        }
+                        return from_moz_pattern(elm, sym_type);
+                    }),
+                    is_array: true
+                });
+
+            case "SpreadElement":
+            case "RestElement":
+                return new AST_Expansion({
+                    start: my_start_token(M),
+                    end: my_end_token(M),
+                    expression: from_moz_pattern(M.argument, sym_type),
+                });
+
+            case "AssignmentPattern":
+                return new AST_DefaultAssign({
+                    start : my_start_token(M),
+                    end   : my_end_token(M),
+                    left  : from_moz_pattern(M.left, sym_type),
+                    operator: "=",
+                    right : from_moz(M.right),
+                });
+
+            case "Identifier":
+                return new sym_type({
+                    start : my_start_token(M),
+                    end   : my_end_token(M),
+                    name  : M.name,
+                });
+
+            default:
+                throw new Error("Invalid node type for destructuring: " + M.type);
+        }
+    }
+
+    function from_moz_label_ref(m_label) {
+        if (!m_label) return null;
+
+        const label = from_moz_symbol(AST_LabelRef, m_label);
+
+        let i = FROM_MOZ_LABELS.length;
+        while (i--) {
+            const label_origin = FROM_MOZ_LABELS[i];
+
+            if (label.name === label_origin.name) {
+                label.thedef = label_origin;
+                break;
+            }
+        }
+
+        return label;
+    }
+
+    AST_Node.from_mozilla_ast = function(node) {
+        var save_labels = FROM_MOZ_LABELS;
+        FROM_MOZ_LABELS = [];
+        var ast = from_moz(node);
+        FROM_MOZ_LABELS = save_labels;
+        return ast;
+    };
+
+    function set_moz_loc(mynode, moznode) {
+        var start = mynode.start;
+        var end = mynode.end;
+        if (!(start && end)) {
+            return moznode;
+        }
+        if (start.pos != null && end.endpos != null) {
+            moznode.range = [start.pos, end.endpos];
+        }
+        if (start.line) {
+            moznode.loc = {
+                start: {line: start.line, column: start.col},
+                end: end.endline ? {line: end.endline, column: end.endcol} : null
+            };
+            if (start.file) {
+                moznode.loc.source = start.file;
+            }
+        }
+        return moznode;
+    }
+
+    function def_to_moz(mytype, handler) {
+        mytype.DEFMETHOD("to_mozilla_ast", function(parent) {
+            return set_moz_loc(this, handler(this, parent));
+        });
+    }
+
+    var TO_MOZ_STACK = null;
+
+    function to_moz(node) {
+        if (TO_MOZ_STACK === null) { TO_MOZ_STACK = []; }
+        TO_MOZ_STACK.push(node);
+        var ast = node != null ? node.to_mozilla_ast(TO_MOZ_STACK[TO_MOZ_STACK.length - 2]) : null;
+        TO_MOZ_STACK.pop();
+        if (TO_MOZ_STACK.length === 0) { TO_MOZ_STACK = null; }
+        return ast;
+    }
+
+    /** Object property keys can be number literals, string literals, or raw names. Additionally they can be shorthand. We decide that here. */
+    function to_moz_property_key(key, computed = false, quote = false, value = null) {
+        if (computed) {
+            return [false, to_moz(key)];
+        }
+
+        const key_name = typeof key === "string" ? key : key.name;
+        let moz_key;
+        if (quote) {
+            moz_key = { type: "Literal", value: key_name, raw: JSON.stringify(key_name) };
+        } else if ("" + +key_name === key_name && +key_name >= 0) {
+            // representable as a number
+            moz_key = { type: "Literal", value: +key_name, raw: JSON.stringify(+key_name) };
+        } else {
+            moz_key = { type: "Identifier", name: key_name };
+        }
+
+        const shorthand =
+            moz_key.type === "Identifier"
+            && moz_key.name === key_name
+            && (value instanceof AST_Symbol && value.name === key_name
+                || value instanceof AST_DefaultAssign && value.left.name === key_name);
+        return [shorthand, moz_key];
+    }
+
+    function to_moz_pattern(node) {
+        if (node instanceof AST_Expansion) {
+            return {
+                type: "RestElement",
+                argument: to_moz_pattern(node.expression),
+            };
+        }
+
+        if ((
+            node instanceof AST_Symbol
+            || node instanceof AST_Destructuring
+            || node instanceof AST_DefaultAssign
+            || node instanceof AST_PropAccess
+        )) {
+            // Plain translation
+            return to_moz(node);
+        }
+
+        throw new Error(node.TYPE);
+    }
+
+    function to_moz_in_destructuring() {
+        var i = TO_MOZ_STACK.length;
+        while (i--) {
+            if (TO_MOZ_STACK[i] instanceof AST_Destructuring) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    function to_moz_block(node) {
+        return {
+            type: "BlockStatement",
+            body: node.body.map(to_moz)
+        };
+    }
+
+    function to_moz_scope(type, node) {
+        var body = node.body.map(to_moz);
+        if (node.body[0] instanceof AST_SimpleStatement && node.body[0].body instanceof AST_String) {
+            body.unshift(to_moz(new AST_EmptyStatement(node.body[0])));
+        }
+        return {
+            type: type,
+            body: body
+        };
+    }
+})();
Index: frontend/node_modules/terser/lib/output.js
===================================================================
--- frontend/node_modules/terser/lib/output.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/output.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,2551 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+"use strict";
+
+import {
+    defaults,
+    makePredicate,
+    noop,
+    regexp_source_fix,
+    sort_regexp_flags,
+    return_false,
+    return_true,
+} from "./utils/index.js";
+import { first_in_statement, left_is_object } from "./utils/first_in_statement.js";
+import {
+    AST_Array,
+    AST_Arrow,
+    AST_Assign,
+    AST_Await,
+    AST_BigInt,
+    AST_Binary,
+    AST_BlockStatement,
+    AST_Break,
+    AST_Call,
+    AST_Case,
+    AST_Catch,
+    AST_Chain,
+    AST_Class,
+    AST_ClassExpression,
+    AST_ClassPrivateProperty,
+    AST_ClassProperty,
+    AST_ClassStaticBlock,
+    AST_ConciseMethod,
+    AST_PrivateGetter,
+    AST_PrivateMethod,
+    AST_SymbolPrivateProperty,
+    AST_PrivateSetter,
+    AST_PrivateIn,
+    AST_Conditional,
+    AST_Const,
+    AST_Constant,
+    AST_Continue,
+    AST_Debugger,
+    AST_Default,
+    AST_DefaultAssign,
+    AST_Definitions,
+    AST_DefinitionsLike,
+    AST_Defun,
+    AST_Destructuring,
+    AST_Directive,
+    AST_Do,
+    AST_Dot,
+    AST_DotHash,
+    AST_EmptyStatement,
+    AST_Exit,
+    AST_Expansion,
+    AST_Export,
+    AST_Finally,
+    AST_For,
+    AST_ForIn,
+    AST_ForOf,
+    AST_Function,
+    AST_Hole,
+    AST_If,
+    AST_DynamicImport,
+    AST_Import,
+    AST_ImportMeta,
+    AST_Jump,
+    AST_LabeledStatement,
+    AST_Lambda,
+    AST_Let,
+    AST_LoopControl,
+    AST_NameMapping,
+    AST_New,
+    AST_NewTarget,
+    AST_Node,
+    AST_Number,
+    AST_Object,
+    AST_ObjectGetter,
+    AST_ObjectKeyVal,
+    AST_ObjectProperty,
+    AST_ObjectSetter,
+    AST_PrefixedTemplateString,
+    AST_PropAccess,
+    AST_RegExp,
+    AST_Return,
+    AST_Scope,
+    AST_Sequence,
+    AST_SimpleStatement,
+    AST_Statement,
+    AST_StatementWithBody,
+    AST_String,
+    AST_Sub,
+    AST_Super,
+    AST_Switch,
+    AST_SwitchBranch,
+    AST_Symbol,
+    AST_SymbolClassProperty,
+    AST_SymbolMethod,
+    AST_SymbolRef,
+    AST_TemplateSegment,
+    AST_TemplateString,
+    AST_This,
+    AST_Throw,
+    AST_Toplevel,
+    AST_Try,
+    AST_TryBlock,
+    AST_Unary,
+    AST_UnaryPostfix,
+    AST_UnaryPrefix,
+    AST_Using,
+    AST_Var,
+    AST_VarDefLike,
+    AST_While,
+    AST_With,
+    AST_Yield,
+    TreeWalker,
+    walk,
+    walk_abort
+} from "./ast.js";
+import {
+    get_full_char_code,
+    get_full_char,
+    is_identifier_char,
+    is_basic_identifier_string,
+    is_identifier_string,
+    PRECEDENCE,
+    ALL_RESERVED_WORDS,
+} from "./parse.js";
+
+const CODE_LINE_BREAK = 10;
+const CODE_SPACE = 32;
+
+const r_annotation = /[@#]__(PURE|INLINE|NOINLINE)__/;
+
+function is_some_comments(comment) {
+    // multiline comment
+    return (
+        (comment.type === "comment2" || comment.type === "comment1")
+        && /@preserve|@copyright|@lic|@cc_on|^\**!/i.test(comment.value)
+    );
+}
+
+const ROPE_COMMIT_WHEN = 8 * 1000;
+class Rope {
+    constructor() {
+        this.committed = "";
+        this.current = "";
+    }
+
+    append(str) {
+        /** When `this.current` is too long, commit it. */
+        if (this.current.length > ROPE_COMMIT_WHEN) {
+            this.committed += this.current + str;
+            this.current = "";
+        } else {
+            this.current += str;
+        }
+    }
+
+    insertAt(char, index) {
+        const { committed, current } = this;
+        if (index < committed.length) {
+            this.committed = committed.slice(0, index) + char + committed.slice(index);
+        } else if (index === committed.length) {
+            this.committed += char;
+        } else {
+            index -= committed.length;
+            this.committed += current.slice(0, index) + char;
+            this.current = current.slice(index);
+        }
+    }
+
+    charAt(index) {
+        const { committed } = this;
+        if (index < committed.length) return committed[index];
+        return this.current[index - committed.length];
+    }
+
+    charCodeAt(index) {
+        const { committed } = this;
+        if (index < committed.length) return committed.charCodeAt(index);
+        return this.current.charCodeAt(index - committed.length);
+    }
+
+    length() {
+        return this.committed.length + this.current.length;
+    }
+
+    expectDirective() {
+        // /^$|[;{][\s\n]*$/
+
+        let ch, n = this.length();
+
+        if (n <= 0) return true;
+
+        // Skip N whitespace from the end
+        while (
+            (ch = this.charCodeAt(--n))
+            && (ch == CODE_SPACE || ch == CODE_LINE_BREAK)
+        );
+
+        // either ";", or "{", or the string ended
+        return !ch || ch === 59 || ch === 123;
+    }
+
+    hasNLB() {
+        let n = this.length() - 1;
+        while (n >= 0) {
+            const code = this.charCodeAt(n--);
+
+            if (code === CODE_LINE_BREAK) return true;
+            if (code !== CODE_SPACE) return false;
+        }
+        return true;
+    }
+
+
+    toString() {
+        return this.committed + this.current;
+    }
+}
+
+function OutputStream(options) {
+
+    var readonly = !options;
+    options = defaults(options, {
+        ascii_only           : false,
+        beautify             : false,
+        braces               : false,
+        comments             : "some",
+        ecma                 : 5,
+        ie8                  : false,
+        indent_level         : 4,
+        indent_start         : 0,
+        inline_script        : true,
+        keep_numbers         : false,
+        keep_quoted_props    : false,
+        max_line_len         : false,
+        preamble             : null,
+        preserve_annotations : false,
+        quote_keys           : false,
+        quote_style          : 0,
+        safari10             : false,
+        semicolons           : true,
+        shebang              : true,
+        shorthand            : undefined,
+        source_map           : null,
+        webkit               : false,
+        width                : 80,
+        wrap_iife            : false,
+        wrap_func_args       : false,
+
+        _destroy_ast         : false
+    }, true);
+
+    if (options.shorthand === undefined)
+        options.shorthand = options.ecma > 5;
+
+    // Convert comment option to RegExp if necessary and set up comments filter
+    var comment_filter = return_false; // Default case, throw all comments away
+    if (options.comments) {
+        let comments = options.comments;
+        if (typeof options.comments === "string" && /^\/.*\/[a-zA-Z]*$/.test(options.comments)) {
+            var regex_pos = options.comments.lastIndexOf("/");
+            comments = new RegExp(
+                options.comments.substr(1, regex_pos - 1),
+                options.comments.substr(regex_pos + 1)
+            );
+        }
+        if (comments instanceof RegExp) {
+            comment_filter = function(comment) {
+                return comment.type != "comment5" && comments.test(comment.value);
+            };
+        } else if (typeof comments === "function") {
+            comment_filter = function(comment) {
+                return comment.type != "comment5" && comments(this, comment);
+            };
+        } else if (comments === "some") {
+            comment_filter = is_some_comments;
+        } else { // NOTE includes "all" option
+            comment_filter = return_true;
+        }
+    }
+
+    if (options.preserve_annotations) {
+        let prev_comment_filter = comment_filter;
+        comment_filter = function (comment) {
+            return r_annotation.test(comment.value) || prev_comment_filter.apply(this, arguments);
+        };
+    }
+
+    var indentation = 0;
+    var current_col = 0;
+    var current_line = 1;
+    var current_pos = 0;
+    var OUTPUT = new Rope();
+    let printed_comments = new Set();
+
+    var to_utf8 = options.ascii_only ? function(str, identifier = false, regexp = false) {
+        if (options.ecma >= 2015 && !options.safari10 && !regexp) {
+            str = str.replace(/[\ud800-\udbff][\udc00-\udfff]/g, function(ch) {
+                var code = get_full_char_code(ch, 0).toString(16);
+                return "\\u{" + code + "}";
+            });
+        }
+        return str.replace(/[\u0000-\u001f\u007f-\uffff]/g, function(ch) {
+            var code = ch.charCodeAt(0).toString(16);
+            if (code.length <= 2 && !identifier) {
+                while (code.length < 2) code = "0" + code;
+                return "\\x" + code;
+            } else {
+                while (code.length < 4) code = "0" + code;
+                return "\\u" + code;
+            }
+        });
+    } : function(str) {
+        return str.replace(/[\ud800-\udbff][\udc00-\udfff]|([\ud800-\udbff]|[\udc00-\udfff])/g, function(match, lone) {
+            if (lone) {
+                return "\\u" + lone.charCodeAt(0).toString(16);
+            }
+            return match;
+        });
+    };
+
+    function make_string(str, quote) {
+        var dq = 0, sq = 0;
+        str = str.replace(/[\\\b\f\n\r\v\t\x22\x27\u2028\u2029\0\ufeff]/g,
+          function(s, i) {
+            switch (s) {
+              case '"': ++dq; return '"';
+              case "'": ++sq; return "'";
+              case "\\": return "\\\\";
+              case "\n": return "\\n";
+              case "\r": return "\\r";
+              case "\t": return "\\t";
+              case "\b": return "\\b";
+              case "\f": return "\\f";
+              case "\x0B": return options.ie8 ? "\\x0B" : "\\v";
+              case "\u2028": return "\\u2028";
+              case "\u2029": return "\\u2029";
+              case "\ufeff": return "\\ufeff";
+              case "\0":
+                  return /[0-9]/.test(get_full_char(str, i+1)) ? "\\x00" : "\\0";
+            }
+            return s;
+        });
+        function quote_single() {
+            return "'" + str.replace(/\x27/g, "\\'") + "'";
+        }
+        function quote_double() {
+            return '"' + str.replace(/\x22/g, '\\"') + '"';
+        }
+        function quote_template() {
+            return "`" + str.replace(/`/g, "\\`") + "`";
+        }
+        str = to_utf8(str);
+        if (quote === "`") return quote_template();
+        switch (options.quote_style) {
+          case 1:
+            return quote_single();
+          case 2:
+            return quote_double();
+          case 3:
+            return quote == "'" ? quote_single() : quote_double();
+          default:
+            return dq > sq ? quote_single() : quote_double();
+        }
+    }
+
+    function encode_string(str, quote) {
+        var ret = make_string(str, quote);
+        if (options.inline_script) {
+            ret = ret.replace(/<\x2f(script)([>\/\t\n\f\r ])/gi, "<\\/$1$2");
+            ret = ret.replace(/\x3c!--/g, "\\x3c!--");
+            ret = ret.replace(/--\x3e/g, "--\\x3e");
+        }
+        return ret;
+    }
+
+    function make_name(name) {
+        name = name.toString();
+        name = to_utf8(name, true);
+        return name;
+    }
+
+    function make_indent(back) {
+        return " ".repeat(options.indent_start + indentation - back * options.indent_level);
+    }
+
+    /* -----[ beautification/minification ]----- */
+
+    var has_parens = false;
+    var might_need_space = false;
+    var might_need_semicolon = false;
+    var might_add_newline = 0;
+    var need_newline_indented = false;
+    var need_space = false;
+    var newline_insert = -1;
+    var last = "";
+    var mapping_token, mapping_name, mappings = options.source_map && [];
+
+    var do_add_mapping = mappings ? function() {
+        mappings.forEach(function(mapping) {
+            try {
+                let { name, token } = mapping;
+                if (name !== false) {
+                    if (token.type == "name" || token.type === "privatename") {
+                        name = token.value;
+                    } else if (name instanceof AST_Symbol) {
+                        name = token.type === "string" ? token.value : name.name;
+                    }
+                }
+                options.source_map.add(
+                    mapping.token.file,
+                    mapping.line, mapping.col,
+                    mapping.token.line, mapping.token.col,
+                    is_basic_identifier_string(name) ? name : undefined
+                );
+            } catch(ex) {
+                // Ignore bad mapping
+            }
+        });
+        mappings = [];
+    } : noop;
+
+    var ensure_line_len = options.max_line_len ? function() {
+        if (current_col > options.max_line_len) {
+            if (might_add_newline) {
+                OUTPUT.insertAt("\n", might_add_newline);
+                const len_after_newline = OUTPUT.length() - might_add_newline - 1;
+                if (mappings) {
+                    var delta = len_after_newline - current_col;
+                    mappings.forEach(function(mapping) {
+                        mapping.line++;
+                        mapping.col += delta;
+                    });
+                }
+                current_line++;
+                current_pos++;
+                current_col = len_after_newline;
+            }
+        }
+        if (might_add_newline) {
+            might_add_newline = 0;
+            do_add_mapping();
+        }
+    } : noop;
+
+    var requireSemicolonChars = makePredicate("( [ + * / - , . `");
+
+    function print(str) {
+        str = String(str);
+        var ch = get_full_char(str, 0);
+        if (need_newline_indented && ch) {
+            need_newline_indented = false;
+            if (ch !== "\n") {
+                print("\n");
+                indent();
+            }
+        }
+        if (need_space && ch) {
+            need_space = false;
+            if (!/[\s;})]/.test(ch)) {
+                space();
+            }
+        }
+        newline_insert = -1;
+        var prev = last.charAt(last.length - 1);
+        if (might_need_semicolon) {
+            might_need_semicolon = false;
+
+            if (prev === ":" && ch === "}" || (!ch || !";}".includes(ch)) && prev !== ";") {
+                if (options.semicolons || requireSemicolonChars.has(ch)) {
+                    OUTPUT.append(";");
+                    current_col++;
+                    current_pos++;
+                } else {
+                    ensure_line_len();
+                    if (current_col > 0) {
+                        OUTPUT.append("\n");
+                        current_pos++;
+                        current_line++;
+                        current_col = 0;
+                    }
+
+                    if (/^\s+$/.test(str)) {
+                        // reset the semicolon flag, since we didn't print one
+                        // now and might still have to later
+                        might_need_semicolon = true;
+                    }
+                }
+
+                if (!options.beautify)
+                    might_need_space = false;
+            }
+        }
+
+        if (might_need_space) {
+            if ((is_identifier_char(prev)
+                    && (is_identifier_char(ch) || ch == "\\"))
+                || (ch == "/" && ch == prev)
+                || ((ch == "+" || ch == "-") && ch == last)
+            ) {
+                OUTPUT.append(" ");
+                current_col++;
+                current_pos++;
+            }
+            might_need_space = false;
+        }
+
+        if (mapping_token) {
+            mappings.push({
+                token: mapping_token,
+                name: mapping_name,
+                line: current_line,
+                col: current_col
+            });
+            mapping_token = false;
+            if (!might_add_newline) do_add_mapping();
+        }
+
+        OUTPUT.append(str);
+        has_parens = str[str.length - 1] == "(";
+        current_pos += str.length;
+        var a = str.split(/\r?\n/), n = a.length - 1;
+        current_line += n;
+        current_col += a[0].length;
+        if (n > 0) {
+            ensure_line_len();
+            current_col = a[n].length;
+        }
+        last = str;
+    }
+
+    var star = function() {
+        print("*");
+    };
+
+    var space = options.beautify ? function() {
+        print(" ");
+    } : function() {
+        might_need_space = true;
+    };
+
+    var indent = options.beautify ? function(half) {
+        if (options.beautify) {
+            print(make_indent(half ? 0.5 : 0));
+        }
+    } : noop;
+
+    var with_indent = options.beautify ? function(col, cont) {
+        if (col === true) col = next_indent();
+        var save_indentation = indentation;
+        indentation = col;
+        var ret = cont();
+        indentation = save_indentation;
+        return ret;
+    } : function(col, cont) { return cont(); };
+
+    var newline = options.beautify ? function() {
+        if (newline_insert < 0) return print("\n");
+        if (OUTPUT.charAt(newline_insert) != "\n") {
+            OUTPUT.insertAt("\n", newline_insert);
+            current_pos++;
+            current_line++;
+        }
+        newline_insert++;
+    } : options.max_line_len ? function() {
+        ensure_line_len();
+        might_add_newline = OUTPUT.length();
+    } : noop;
+
+    var semicolon = options.beautify ? function() {
+        print(";");
+    } : function() {
+        might_need_semicolon = true;
+    };
+
+    function force_semicolon() {
+        might_need_semicolon = false;
+        print(";");
+    }
+
+    function next_indent() {
+        return indentation + options.indent_level;
+    }
+
+    function with_block(cont) {
+        var ret;
+        print("{");
+        newline();
+        with_indent(next_indent(), function() {
+            ret = cont();
+        });
+        indent();
+        print("}");
+        return ret;
+    }
+
+    function with_parens(cont) {
+        print("(");
+        //XXX: still nice to have that for argument lists
+        //var ret = with_indent(current_col, cont);
+        var ret = cont();
+        print(")");
+        return ret;
+    }
+
+    function with_square(cont) {
+        print("[");
+        //var ret = with_indent(current_col, cont);
+        var ret = cont();
+        print("]");
+        return ret;
+    }
+
+    function comma() {
+        print(",");
+        space();
+    }
+
+    function colon() {
+        print(":");
+        space();
+    }
+
+    var add_mapping = mappings ? function(token, name) {
+        mapping_token = token;
+        mapping_name = name;
+    } : noop;
+
+    function get() {
+        if (might_add_newline) {
+            ensure_line_len();
+        }
+        return OUTPUT.toString();
+    }
+
+    function filter_comment(comment) {
+        if (!options.preserve_annotations) {
+            comment = comment.replace(r_annotation, " ");
+        }
+        if (/^\s*$/.test(comment)) {
+            return "";
+        }
+        return comment.replace(/(<\s*\/\s*)(script)/i, "<\\/$2");
+    }
+
+    function prepend_comments(node) {
+        var self = this;
+        var start = node.start;
+        if (!start) return;
+        var printed_comments = self.printed_comments;
+
+        // There cannot be a newline between return/yield and its value.
+        const keyword_with_value = 
+            node instanceof AST_Exit && node.value
+            || (node instanceof AST_Await || node instanceof AST_Yield)
+                && node.expression;
+
+        if (
+            start.comments_before
+            && printed_comments.has(start.comments_before)
+        ) {
+            if (keyword_with_value) {
+                start.comments_before = [];
+            } else {
+                return;
+            }
+        }
+
+        var comments = start.comments_before;
+        if (!comments) {
+            comments = start.comments_before = [];
+        }
+        printed_comments.add(comments);
+
+        if (keyword_with_value) {
+            var tw = new TreeWalker(function(node) {
+                var parent = tw.parent();
+                if (parent instanceof AST_Exit
+                    || parent instanceof AST_Await
+                    || parent instanceof AST_Yield
+                    || parent instanceof AST_Binary && parent.left === node
+                    || parent.TYPE == "Call" && parent.expression === node
+                    || parent instanceof AST_Conditional && parent.condition === node
+                    || parent instanceof AST_Dot && parent.expression === node
+                    || parent instanceof AST_Sequence && parent.expressions[0] === node
+                    || parent instanceof AST_Sub && parent.expression === node
+                    || parent instanceof AST_UnaryPostfix) {
+                    if (!node.start) return;
+                    var text = node.start.comments_before;
+                    if (text && !printed_comments.has(text)) {
+                        printed_comments.add(text);
+                        comments = comments.concat(text);
+                    }
+                } else {
+                    return true;
+                }
+            });
+            tw.push(node);
+            keyword_with_value.walk(tw);
+        }
+
+        if (current_pos == 0) {
+            if (comments.length > 0 && options.shebang && comments[0].type === "comment5"
+                && !printed_comments.has(comments[0])) {
+                print("#!" + comments.shift().value + "\n");
+                indent();
+            }
+            var preamble = options.preamble;
+            if (preamble) {
+                print(preamble.replace(/\r\n?|[\n\u2028\u2029]|\s*$/g, "\n"));
+            }
+        }
+
+        comments = comments.filter(comment_filter, node).filter(c => !printed_comments.has(c));
+        if (comments.length == 0) return;
+        var last_nlb = OUTPUT.hasNLB();
+        comments.forEach(function(c, i) {
+            printed_comments.add(c);
+            if (!last_nlb) {
+                if (c.nlb) {
+                    print("\n");
+                    indent();
+                    last_nlb = true;
+                } else if (i > 0) {
+                    space();
+                }
+            }
+
+            if (/comment[134]/.test(c.type)) {
+                var value = filter_comment(c.value);
+                if (value) {
+                    print("//" + value + "\n");
+                    indent();
+                }
+                last_nlb = true;
+            } else if (c.type == "comment2") {
+                var value = filter_comment(c.value);
+                if (value) {
+                    print("/*" + value + "*/");
+                }
+                last_nlb = false;
+            }
+        });
+        if (!last_nlb) {
+            if (start.nlb) {
+                print("\n");
+                indent();
+            } else {
+                space();
+            }
+        }
+    }
+
+    function append_comments(node, tail) {
+        var self = this;
+        var token = node.end;
+        if (!token) return;
+        var printed_comments = self.printed_comments;
+        var comments = token[tail ? "comments_before" : "comments_after"];
+        if (!comments || printed_comments.has(comments)) return;
+        if (!(node instanceof AST_Statement || comments.every((c) =>
+            !/comment[134]/.test(c.type)
+        ))) return;
+        printed_comments.add(comments);
+        var insert = OUTPUT.length();
+        comments.filter(comment_filter, node).forEach(function(c, i) {
+            if (printed_comments.has(c)) return;
+            printed_comments.add(c);
+            need_space = false;
+            if (need_newline_indented) {
+                print("\n");
+                indent();
+                need_newline_indented = false;
+            } else if (c.nlb && (i > 0 || !OUTPUT.hasNLB())) {
+                print("\n");
+                indent();
+            } else if (i > 0 || !tail) {
+                space();
+            }
+            if (/comment[134]/.test(c.type)) {
+                const value = filter_comment(c.value);
+                if (value) {
+                    print("//" + value);
+                }
+                need_newline_indented = true;
+            } else if (c.type == "comment2") {
+                const value = filter_comment(c.value);
+                if (value) {
+                    print("/*" + value + "*/");
+                }
+                need_space = true;
+            }
+        });
+        if (OUTPUT.length() > insert) newline_insert = insert;
+    }
+
+    /**
+     * When output.option("_destroy_ast") is enabled, destroy the function.
+     * Call this after printing it.
+     */
+    const gc_scope =
+      options["_destroy_ast"]
+        ? function gc_scope(scope) {
+            scope.body.length = 0;
+            scope.argnames.length = 0;
+        }
+        : noop;
+
+    var stack = [];
+    return {
+        get             : get,
+        toString        : get,
+        indent          : indent,
+        in_directive    : false,
+        use_asm         : null,
+        active_scope    : null,
+        indentation     : function() { return indentation; },
+        current_width   : function() { return current_col - indentation; },
+        should_break    : function() { return options.width && this.current_width() >= options.width; },
+        has_parens      : function() { return has_parens; },
+        newline         : newline,
+        print           : print,
+        star            : star,
+        space           : space,
+        comma           : comma,
+        colon           : colon,
+        last            : function() { return last; },
+        semicolon       : semicolon,
+        force_semicolon : force_semicolon,
+        to_utf8         : to_utf8,
+        print_name      : function(name) { print(make_name(name)); },
+        print_string    : function(str, quote, escape_directive) {
+            var encoded = encode_string(str, quote);
+            if (escape_directive === true && !encoded.includes("\\")) {
+                // Insert semicolons to break directive prologue
+                if (!OUTPUT.expectDirective()) {
+                    force_semicolon();
+                }
+                force_semicolon();
+            }
+            print(encoded);
+        },
+        print_template_string_chars: function(str) {
+            var encoded = encode_string(str, "`").replace(/\${/g, "\\${");
+            return print(encoded.substr(1, encoded.length - 2));
+        },
+        encode_string   : encode_string,
+        next_indent     : next_indent,
+        with_indent     : with_indent,
+        with_block      : with_block,
+        with_parens     : with_parens,
+        with_square     : with_square,
+        add_mapping     : add_mapping,
+        option          : function(opt) { return options[opt]; },
+        gc_scope,
+        printed_comments: printed_comments,
+        prepend_comments: readonly ? noop : prepend_comments,
+        append_comments : readonly || comment_filter === return_false ? noop : append_comments,
+        line            : function() { return current_line; },
+        col             : function() { return current_col; },
+        pos             : function() { return current_pos; },
+        push_node       : function(node) { stack.push(node); },
+        pop_node        : function() { return stack.pop(); },
+        parent          : function(n) {
+            return stack[stack.length - 2 - (n || 0)];
+        }
+    };
+
+}
+
+/* -----[ code generators ]----- */
+
+(function() {
+
+    /* -----[ utils ]----- */
+
+    function DEFPRINT(nodetype, generator) {
+        nodetype.DEFMETHOD("_codegen", generator);
+    }
+
+    AST_Node.DEFMETHOD("print", function(output, force_parens) {
+        var self = this, generator = self._codegen;
+        if (self instanceof AST_Scope) {
+            output.active_scope = self;
+        } else if (!output.use_asm && self instanceof AST_Directive && self.value == "use asm") {
+            output.use_asm = output.active_scope;
+        }
+        function doit() {
+            output.prepend_comments(self);
+            self.add_source_map(output);
+            generator(self, output);
+            output.append_comments(self);
+        }
+        output.push_node(self);
+        if (force_parens || self.needs_parens(output)) {
+            output.with_parens(doit);
+        } else {
+            doit();
+        }
+        output.pop_node();
+        if (self === output.use_asm) {
+            output.use_asm = null;
+        }
+    });
+    AST_Node.DEFMETHOD("_print", AST_Node.prototype.print);
+
+    AST_Node.DEFMETHOD("print_to_string", function(options) {
+        var output = OutputStream(options);
+        this.print(output);
+        return output.get();
+    });
+
+    /* -----[ PARENTHESES ]----- */
+
+    function PARENS(nodetype, func) {
+        if (Array.isArray(nodetype)) {
+            nodetype.forEach(function(nodetype) {
+                PARENS(nodetype, func);
+            });
+        } else {
+            nodetype.DEFMETHOD("needs_parens", func);
+        }
+    }
+
+    PARENS(AST_Node, return_false);
+
+    // a function expression needs parens around it when it's provably
+    // the first token to appear in a statement.
+    PARENS(AST_Function, function(output) {
+        if (!output.has_parens() && first_in_statement(output)) {
+            return true;
+        }
+
+        if (output.option("webkit")) {
+            var p = output.parent();
+            if (p instanceof AST_PropAccess && p.expression === this) {
+                return true;
+            }
+        }
+
+        if (output.option("wrap_iife")) {
+            var p = output.parent();
+            if (p instanceof AST_Call && p.expression === this) {
+                return true;
+            }
+        }
+
+        if (output.option("wrap_func_args")) {
+            var p = output.parent();
+            if (p instanceof AST_Call && p.args.includes(this)) {
+                return true;
+            }
+        }
+
+        return false;
+    });
+
+    PARENS(AST_Arrow, function(output) {
+        var p = output.parent();
+
+        if (
+            output.option("wrap_func_args")
+            && p instanceof AST_Call
+            && p.args.includes(this)
+        ) {
+            return true;
+        }
+        return p instanceof AST_PropAccess && p.expression === this
+            || p instanceof AST_Conditional && p.condition === this;
+    });
+
+    // same goes for an object literal (as in AST_Function), because
+    // otherwise {...} would be interpreted as a block of code.
+    PARENS(AST_Object, function(output) {
+        return !output.has_parens() && first_in_statement(output);
+    });
+
+    PARENS(AST_ClassExpression, first_in_statement);
+
+    PARENS(AST_Unary, function(output) {
+        var p = output.parent();
+        return p instanceof AST_PropAccess && p.expression === this
+            || p instanceof AST_Call && p.expression === this
+            || p instanceof AST_Binary
+                && p.operator === "**"
+                && this instanceof AST_UnaryPrefix
+                && p.left === this
+                && this.operator !== "++"
+                && this.operator !== "--";
+    });
+
+    PARENS(AST_Await, function(output) {
+        var p = output.parent();
+        return p instanceof AST_PropAccess && p.expression === this
+            || p instanceof AST_Call && p.expression === this
+            || p instanceof AST_Binary && p.operator === "**" && p.left === this
+            || output.option("safari10") && p instanceof AST_UnaryPrefix;
+    });
+
+    PARENS(AST_Sequence, function(output) {
+        var p = output.parent();
+        return p instanceof AST_Call                              // (foo, bar)() or foo(1, (2, 3), 4)
+            || p instanceof AST_Unary                             // !(foo, bar, baz)
+            || p instanceof AST_Binary                            // 1 + (2, 3) + 4 ==> 8
+            || p instanceof AST_VarDefLike                        // var a = (1, 2), b = a + a; ==> b == 4
+            || p instanceof AST_PropAccess && this !== p.property // (1, {foo:2}).foo, (1, {foo:2})["foo"], not foo[1, 2]
+            || p instanceof AST_Array                             // [ 1, (2, 3), 4 ] ==> [ 1, 3, 4 ]
+            || p instanceof AST_ObjectProperty                    // { foo: (1, 2) }.foo ==> 2
+            || p instanceof AST_Conditional                       /* (false, true) ? (a = 10, b = 20) : (c = 30)
+                                                                   * ==> 20 (side effect, set a := 10 and b := 20) */
+            || p instanceof AST_Arrow                             // x => (x, x)
+            || p instanceof AST_DefaultAssign                     // x => (x = (0, function(){}))
+            || p instanceof AST_Expansion                         // [...(a, b)]
+            || p instanceof AST_ForOf && this === p.object        // for (e of (foo, bar)) {}
+            || p instanceof AST_Yield                             // yield (foo, bar)
+            || p instanceof AST_Export                            // export default (foo, bar)
+        ;
+    });
+
+    PARENS(AST_Binary, function(output) {
+        var p = output.parent();
+        // (foo && bar)()
+        if (p instanceof AST_Call && p.expression === this)
+            return true;
+        // typeof (foo && bar)
+        if (p instanceof AST_Unary)
+            return true;
+        // (foo && bar)["prop"], (foo && bar).prop
+        if (p instanceof AST_PropAccess && p.expression === this)
+            return true;
+        // this deals with precedence: 3 * (2 + 1)
+        if (p instanceof AST_Binary) {
+            const parent_op = p.operator;
+            const op = this.operator;
+
+            // It is forbidden for ?? to be used with || or && without parens.
+            if (op === "??" && (parent_op === "||" || parent_op === "&&")) {
+                return true;
+            }
+            if (parent_op === "??" && (op === "||" || op === "&&")) {
+                return true;
+            }
+
+            const pp = PRECEDENCE[parent_op];
+            const sp = PRECEDENCE[op];
+            if (pp > sp
+                || (pp == sp
+                    && (this === p.right || parent_op == "**"))) {
+                return true;
+            }
+        }
+        if (p instanceof AST_PrivateIn) {
+            const op = this.operator;
+
+            const pp = PRECEDENCE["in"];
+            const sp = PRECEDENCE[op];
+            if (pp > sp || (pp == sp && this === p.value)) {
+                return true;
+            }
+        }
+    });
+
+    PARENS(AST_PrivateIn, function(output) {
+        var p = output.parent();
+        // (#x in this)()
+        if (p instanceof AST_Call && p.expression === this) {
+            return true;
+        }
+        // typeof (#x in this)
+        if (p instanceof AST_Unary) {
+            return true;
+        }
+        // (#x in this)["prop"], (#x in this).prop
+        if (p instanceof AST_PropAccess && p.expression === this) {
+            return true;
+        }
+        // same precedence as regular in operator
+        if (p instanceof AST_Binary) {
+            const parent_op = p.operator;
+
+            const pp = PRECEDENCE[parent_op];
+            const sp = PRECEDENCE["in"];
+            if (pp > sp
+                || (pp == sp
+                    && (this === p.right || parent_op == "**"))) {
+                return true;
+            }
+        }
+        // rules are the same as binary in, but the class differs
+        if (p instanceof AST_PrivateIn && this === p.value) {
+            return true;
+        }
+    });
+
+    PARENS(AST_Yield, function(output) {
+        var p = output.parent();
+        // (yield 1) + (yield 2)
+        // a = yield 3
+        if (p instanceof AST_Binary && p.operator !== "=")
+            return true;
+        // (yield 1)()
+        // new (yield 1)()
+        if (p instanceof AST_Call && p.expression === this)
+            return true;
+        // (yield 1) ? yield 2 : yield 3
+        if (p instanceof AST_Conditional && p.condition === this)
+            return true;
+        // -(yield 4)
+        if (p instanceof AST_Unary)
+            return true;
+        // (yield x).foo
+        // (yield x)['foo']
+        if (p instanceof AST_PropAccess && p.expression === this)
+            return true;
+    });
+
+    PARENS(AST_Chain, function(output) {
+        var p = output.parent();
+        if (!(p instanceof AST_Call || p instanceof AST_PropAccess)) return false;
+        return p.expression === this;
+    });
+
+    PARENS(AST_PropAccess, function(output) {
+        var p = output.parent();
+        if (p instanceof AST_New && p.expression === this) {
+            // i.e. new (foo.bar().baz)
+            //
+            // if there's one call into this subtree, then we need
+            // parens around it too, otherwise the call will be
+            // interpreted as passing the arguments to the upper New
+            // expression.
+            return walk(this, node => {
+                if (node instanceof AST_Scope) return true;
+                if (node instanceof AST_Call) {
+                    return walk_abort;  // makes walk() return true.
+                }
+            });
+        }
+    });
+
+    PARENS(AST_Call, function(output) {
+        var p = output.parent(), p1;
+        if (p instanceof AST_New && p.expression === this
+            || p instanceof AST_Export && p.is_default && this.expression instanceof AST_Function)
+            return true;
+
+        // workaround for Safari bug.
+        // https://bugs.webkit.org/show_bug.cgi?id=123506
+        return this.expression instanceof AST_Function
+            && p instanceof AST_PropAccess
+            && p.expression === this
+            && (p1 = output.parent(1)) instanceof AST_Assign
+            && p1.left === p;
+    });
+
+    PARENS(AST_New, function(output) {
+        var p = output.parent();
+        if (this.args.length === 0
+            && (p instanceof AST_PropAccess // (new Date).getTime(), (new Date)["getTime"]()
+                || p instanceof AST_Call && p.expression === this
+                || p instanceof AST_PrefixedTemplateString && p.prefix === this)) // (new foo)(bar)
+            return true;
+    });
+
+    PARENS(AST_Number, function(output) {
+        var p = output.parent();
+        if (p instanceof AST_PropAccess && p.expression === this) {
+            var value = this.getValue();
+            if (value < 0 || /^0/.test(make_num(value))) {
+                return true;
+            }
+        }
+    });
+
+    PARENS(AST_BigInt, function(output) {
+        var p = output.parent();
+        if (p instanceof AST_PropAccess && p.expression === this) {
+            var value = this.getValue();
+            if (value.startsWith("-")) {
+                return true;
+            }
+        }
+    });
+
+    PARENS([ AST_Assign, AST_Conditional ], function(output) {
+        var p = output.parent();
+        // !(a = false) → true
+        if (p instanceof AST_Unary)
+            return true;
+        // 1 + (a = 2) + 3 → 6, side effect setting a = 2
+        if (p instanceof AST_Binary && !(p instanceof AST_Assign))
+            return true;
+        // (a = func)() —or— new (a = Object)()
+        if (p instanceof AST_Call && p.expression === this)
+            return true;
+        // (a = foo) ? bar : baz
+        if (p instanceof AST_Conditional && p.condition === this)
+            return true;
+        // (a = foo)["prop"] —or— (a = foo).prop
+        if (p instanceof AST_PropAccess && p.expression === this)
+            return true;
+        // ({a, b} = {a: 1, b: 2}), a destructuring assignment
+        if (this instanceof AST_Assign && this.left instanceof AST_Destructuring && this.left.is_array === false)
+            return true;
+    });
+
+    /* -----[ PRINTERS ]----- */
+
+    DEFPRINT(AST_Directive, function(self, output) {
+        output.print_string(self.value, self.quote);
+        output.semicolon();
+    });
+
+    DEFPRINT(AST_Expansion, function (self, output) {
+        output.print("...");
+        self.expression.print(output);
+    });
+
+    DEFPRINT(AST_Destructuring, function (self, output) {
+        output.print(self.is_array ? "[" : "{");
+        var len = self.names.length;
+        self.names.forEach(function (name, i) {
+            if (i > 0) output.comma();
+            name.print(output);
+            // If the final element is a hole, we need to make sure it
+            // doesn't look like a trailing comma, by inserting an actual
+            // trailing comma.
+            if (i == len - 1 && name instanceof AST_Hole) output.comma();
+        });
+        output.print(self.is_array ? "]" : "}");
+    });
+
+    DEFPRINT(AST_Debugger, function(self, output) {
+        output.print("debugger");
+        output.semicolon();
+    });
+
+    /* -----[ statements ]----- */
+
+    function display_body(body, is_toplevel, output, allow_directives) {
+        var last = body.length - 1;
+        output.in_directive = allow_directives;
+        body.forEach(function(stmt, i) {
+            if (output.in_directive === true && !(stmt instanceof AST_Directive ||
+                stmt instanceof AST_EmptyStatement ||
+                (stmt instanceof AST_SimpleStatement && stmt.body instanceof AST_String)
+            )) {
+                output.in_directive = false;
+            }
+            if (!(stmt instanceof AST_EmptyStatement)) {
+                output.indent();
+                stmt.print(output);
+                if (!(i == last && is_toplevel)) {
+                    output.newline();
+                    if (is_toplevel) output.newline();
+                }
+            }
+            if (output.in_directive === true &&
+                stmt instanceof AST_SimpleStatement &&
+                stmt.body instanceof AST_String
+            ) {
+                output.in_directive = false;
+            }
+        });
+        output.in_directive = false;
+    }
+
+    AST_StatementWithBody.DEFMETHOD("_do_print_body", function(output) {
+        print_maybe_braced_body(this.body, output);
+    });
+
+    DEFPRINT(AST_Statement, function(self, output) {
+        self.body.print(output);
+        output.semicolon();
+    });
+    DEFPRINT(AST_Toplevel, function(self, output) {
+        display_body(self.body, true, output, true);
+        output.print("");
+    });
+    DEFPRINT(AST_LabeledStatement, function(self, output) {
+        self.label.print(output);
+        output.colon();
+        self.body.print(output);
+    });
+    DEFPRINT(AST_SimpleStatement, function(self, output) {
+        self.body.print(output);
+        output.semicolon();
+    });
+    function print_braced_empty(self, output) {
+        output.print("{");
+        output.with_indent(output.next_indent(), function() {
+            output.append_comments(self, true);
+        });
+        output.add_mapping(self.end);
+        output.print("}");
+    }
+    function print_braced(self, output, allow_directives) {
+        if (self.body.length > 0) {
+            output.with_block(function() {
+                display_body(self.body, false, output, allow_directives);
+                output.add_mapping(self.end);
+            });
+        } else print_braced_empty(self, output);
+    }
+    DEFPRINT(AST_BlockStatement, function(self, output) {
+        print_braced(self, output);
+    });
+    DEFPRINT(AST_EmptyStatement, function(self, output) {
+        output.semicolon();
+    });
+    DEFPRINT(AST_Do, function(self, output) {
+        output.print("do");
+        output.space();
+        make_block(self.body, output);
+        output.space();
+        output.print("while");
+        output.space();
+        output.with_parens(function() {
+            self.condition.print(output);
+        });
+        output.semicolon();
+    });
+    DEFPRINT(AST_While, function(self, output) {
+        output.print("while");
+        output.space();
+        output.with_parens(function() {
+            self.condition.print(output);
+        });
+        output.space();
+        self._do_print_body(output);
+    });
+    DEFPRINT(AST_For, function(self, output) {
+        output.print("for");
+        output.space();
+        output.with_parens(function() {
+            if (self.init) {
+                if (self.init instanceof AST_DefinitionsLike) {
+                    self.init.print(output);
+                } else {
+                    parenthesize_for_noin(self.init, output, true);
+                }
+                output.print(";");
+                output.space();
+            } else {
+                output.print(";");
+            }
+            if (self.condition) {
+                self.condition.print(output);
+                output.print(";");
+                output.space();
+            } else {
+                output.print(";");
+            }
+            if (self.step) {
+                self.step.print(output);
+            }
+        });
+        output.space();
+        self._do_print_body(output);
+    });
+    DEFPRINT(AST_ForIn, function(self, output) {
+        output.print("for");
+        if (self.await) {
+            output.space();
+            output.print("await");
+        }
+        output.space();
+        output.with_parens(function() {
+            self.init.print(output);
+            output.space();
+            output.print(self instanceof AST_ForOf ? "of" : "in");
+            output.space();
+            self.object.print(output);
+        });
+        output.space();
+        self._do_print_body(output);
+    });
+    DEFPRINT(AST_With, function(self, output) {
+        output.print("with");
+        output.space();
+        output.with_parens(function() {
+            self.expression.print(output);
+        });
+        output.space();
+        self._do_print_body(output);
+    });
+
+    /* -----[ functions ]----- */
+    AST_Lambda.DEFMETHOD("_do_print", function(output, nokeyword) {
+        var self = this;
+        if (!nokeyword) {
+            if (self.async) {
+                output.print("async");
+                output.space();
+            }
+            output.print("function");
+            if (self.is_generator) {
+                output.star();
+            }
+            if (self.name) {
+                output.space();
+            }
+        }
+        if (self.name instanceof AST_Symbol) {
+            self.name.print(output);
+        } else if (nokeyword && self.name instanceof AST_Node) {
+            output.with_square(function() {
+                self.name.print(output); // Computed method name
+            });
+        }
+        output.with_parens(function() {
+            self.argnames.forEach(function(arg, i) {
+                if (i) output.comma();
+                arg.print(output);
+            });
+        });
+        output.space();
+        print_braced(self, output, true);
+    });
+    DEFPRINT(AST_Lambda, function(self, output) {
+        self._do_print(output);
+        output.gc_scope(self);
+    });
+
+    DEFPRINT(AST_PrefixedTemplateString, function(self, output) {
+        var tag = self.prefix;
+        var parenthesize_tag = tag instanceof AST_Lambda
+            || tag instanceof AST_Binary
+            || tag instanceof AST_Conditional
+            || tag instanceof AST_Sequence
+            || tag instanceof AST_Unary
+            || tag instanceof AST_Dot && tag.expression instanceof AST_Object;
+        if (parenthesize_tag) output.print("(");
+        self.prefix.print(output);
+        if (parenthesize_tag) output.print(")");
+        self.template_string.print(output);
+    });
+    DEFPRINT(AST_TemplateString, function(self, output) {
+        var is_tagged = output.parent() instanceof AST_PrefixedTemplateString;
+
+        output.print("`");
+        for (var i = 0; i < self.segments.length; i++) {
+            if (!(self.segments[i] instanceof AST_TemplateSegment)) {
+                output.print("${");
+                self.segments[i].print(output);
+                output.print("}");
+            } else if (is_tagged) {
+                output.print(self.segments[i].raw);
+            } else {
+                output.print_template_string_chars(self.segments[i].value);
+            }
+        }
+        output.print("`");
+    });
+    DEFPRINT(AST_TemplateSegment, function(self, output) {
+        output.print_template_string_chars(self.value);
+    });
+
+    AST_Arrow.DEFMETHOD("_do_print", function(output) {
+        var self = this;
+        var parent = output.parent();
+        var needs_parens = (parent instanceof AST_Binary &&
+                !(parent instanceof AST_Assign) &&
+                !(parent instanceof AST_DefaultAssign)) ||
+            parent instanceof AST_Unary ||
+            (parent instanceof AST_Call && self === parent.expression);
+        if (needs_parens) { output.print("("); }
+        if (self.async) {
+            output.print("async");
+            output.space();
+        }
+        if (self.argnames.length === 1 && self.argnames[0] instanceof AST_Symbol) {
+            self.argnames[0].print(output);
+        } else {
+            output.with_parens(function() {
+                self.argnames.forEach(function(arg, i) {
+                    if (i) output.comma();
+                    arg.print(output);
+                });
+            });
+        }
+        output.space();
+        output.print("=>");
+        output.space();
+        const first_statement = self.body[0];
+        if (
+            self.body.length === 1
+            && first_statement instanceof AST_Return
+        ) {
+            const returned = first_statement.value;
+            if (!returned) {
+                output.print("{}");
+            } else if (left_is_object(returned)) {
+                output.print("(");
+                returned.print(output);
+                output.print(")");
+            } else {
+                returned.print(output);
+            }
+        } else {
+            print_braced(self, output);
+        }
+        if (needs_parens) { output.print(")"); }
+        output.gc_scope(self);
+    });
+
+    /* -----[ exits ]----- */
+    AST_Exit.DEFMETHOD("_do_print", function(output, kind) {
+        output.print(kind);
+        if (this.value) {
+            output.space();
+            const comments = this.value.start.comments_before;
+            if (comments && comments.length && !output.printed_comments.has(comments)) {
+                output.print("(");
+                this.value.print(output);
+                output.print(")");
+            } else {
+                this.value.print(output);
+            }
+        }
+        output.semicolon();
+    });
+    DEFPRINT(AST_Return, function(self, output) {
+        self._do_print(output, "return");
+    });
+    DEFPRINT(AST_Throw, function(self, output) {
+        self._do_print(output, "throw");
+    });
+
+    /* -----[ yield ]----- */
+
+    DEFPRINT(AST_Yield, function(self, output) {
+        var star = self.is_star ? "*" : "";
+        output.print("yield" + star);
+        if (self.expression) {
+            output.space();
+            self.expression.print(output);
+        }
+    });
+
+    DEFPRINT(AST_Await, function(self, output) {
+        output.print("await");
+        output.space();
+        var e = self.expression;
+        var parens = !(
+               e instanceof AST_Call
+            || e instanceof AST_SymbolRef
+            || e instanceof AST_PropAccess
+            || e instanceof AST_Unary
+            || e instanceof AST_Constant
+            || e instanceof AST_Await
+            || e instanceof AST_Object
+        );
+        if (parens) output.print("(");
+        self.expression.print(output);
+        if (parens) output.print(")");
+    });
+
+    /* -----[ loop control ]----- */
+    AST_LoopControl.DEFMETHOD("_do_print", function(output, kind) {
+        output.print(kind);
+        if (this.label) {
+            output.space();
+            this.label.print(output);
+        }
+        output.semicolon();
+    });
+    DEFPRINT(AST_Break, function(self, output) {
+        self._do_print(output, "break");
+    });
+    DEFPRINT(AST_Continue, function(self, output) {
+        self._do_print(output, "continue");
+    });
+
+    /* -----[ if ]----- */
+    function make_then(self, output) {
+        var b = self.body;
+        if (output.option("braces")
+            || output.option("ie8") && b instanceof AST_Do)
+            return make_block(b, output);
+        // The squeezer replaces "block"-s that contain only a single
+        // statement with the statement itself; technically, the AST
+        // is correct, but this can create problems when we output an
+        // IF having an ELSE clause where the THEN clause ends in an
+        // IF *without* an ELSE block (then the outer ELSE would refer
+        // to the inner IF).  This function checks for this case and
+        // adds the block braces if needed.
+        if (!b) return output.force_semicolon();
+        while (true) {
+            if (b instanceof AST_If) {
+                if (!b.alternative) {
+                    make_block(self.body, output);
+                    return;
+                }
+                b = b.alternative;
+            } else if (b instanceof AST_StatementWithBody) {
+                b = b.body;
+            } else break;
+        }
+        print_maybe_braced_body(self.body, output);
+    }
+    DEFPRINT(AST_If, function(self, output) {
+        output.print("if");
+        output.space();
+        output.with_parens(function() {
+            self.condition.print(output);
+        });
+        output.space();
+        if (self.alternative) {
+            make_then(self, output);
+            output.space();
+            output.print("else");
+            output.space();
+            if (self.alternative instanceof AST_If)
+                self.alternative.print(output);
+            else
+                print_maybe_braced_body(self.alternative, output);
+        } else {
+            self._do_print_body(output);
+        }
+    });
+
+    /* -----[ switch ]----- */
+    DEFPRINT(AST_Switch, function(self, output) {
+        output.print("switch");
+        output.space();
+        output.with_parens(function() {
+            self.expression.print(output);
+        });
+        output.space();
+        var last = self.body.length - 1;
+        if (last < 0) print_braced_empty(self, output);
+        else output.with_block(function() {
+            self.body.forEach(function(branch, i) {
+                output.indent(true);
+                branch.print(output);
+                if (i < last && branch.body.length > 0)
+                    output.newline();
+            });
+        });
+    });
+    AST_SwitchBranch.DEFMETHOD("_do_print_body", function(output) {
+        output.newline();
+        this.body.forEach(function(stmt) {
+            output.indent();
+            stmt.print(output);
+            output.newline();
+        });
+    });
+    DEFPRINT(AST_Default, function(self, output) {
+        output.print("default:");
+        self._do_print_body(output);
+    });
+    DEFPRINT(AST_Case, function(self, output) {
+        output.print("case");
+        output.space();
+        self.expression.print(output);
+        output.print(":");
+        self._do_print_body(output);
+    });
+
+    /* -----[ exceptions ]----- */
+    DEFPRINT(AST_Try, function(self, output) {
+        output.print("try");
+        output.space();
+        self.body.print(output);
+        if (self.bcatch) {
+            output.space();
+            self.bcatch.print(output);
+        }
+        if (self.bfinally) {
+            output.space();
+            self.bfinally.print(output);
+        }
+    });
+    DEFPRINT(AST_TryBlock, function(self, output) {
+        print_braced(self, output);
+    });
+    DEFPRINT(AST_Catch, function(self, output) {
+        output.print("catch");
+        if (self.argname) {
+            output.space();
+            output.with_parens(function() {
+                self.argname.print(output);
+            });
+        }
+        output.space();
+        print_braced(self, output);
+    });
+    DEFPRINT(AST_Finally, function(self, output) {
+        output.print("finally");
+        output.space();
+        print_braced(self, output);
+    });
+
+    /* -----[ var/const ]----- */
+    AST_DefinitionsLike.DEFMETHOD("_do_print", function(output, kind) {
+        output.print(kind);
+        output.space();
+        this.definitions.forEach(function(def, i) {
+            if (i) output.comma();
+            def.print(output);
+        });
+        var p = output.parent();
+        var in_for = p instanceof AST_For || p instanceof AST_ForIn;
+        var output_semicolon = !in_for || p && p.init !== this;
+        if (output_semicolon)
+            output.semicolon();
+    });
+    DEFPRINT(AST_Let, function(self, output) {
+        self._do_print(output, "let");
+    });
+    DEFPRINT(AST_Var, function(self, output) {
+        self._do_print(output, "var");
+    });
+    DEFPRINT(AST_Const, function(self, output) {
+        self._do_print(output, "const");
+    });
+    DEFPRINT(AST_Using, function(self, output) {
+        self._do_print(output, self.await ? "await using" : "using");
+    });
+    DEFPRINT(AST_Import, function(self, output) {
+        output.print("import");
+        output.space();
+        if (self.phase) {
+            output.print(self.phase);
+            output.space();
+        }
+        if (self.imported_name) {
+            self.imported_name.print(output);
+        }
+        if (self.imported_name && self.imported_names) {
+            output.print(",");
+            output.space();
+        }
+        if (self.imported_names) {
+            if (self.imported_names.length === 1 &&
+                self.imported_names[0].foreign_name.name === "*" &&
+                !self.imported_names[0].foreign_name.quote) {
+                self.imported_names[0].print(output);
+            } else {
+                output.print("{");
+                self.imported_names.forEach(function (name_import, i) {
+                    output.space();
+                    name_import.print(output);
+                    if (i < self.imported_names.length - 1) {
+                        output.print(",");
+                    }
+                });
+                output.space();
+                output.print("}");
+            }
+        }
+        if (self.imported_name || self.imported_names) {
+            output.space();
+            output.print("from");
+            output.space();
+        }
+        self.module_name.print(output);
+        if (self.attributes) {
+            output.print("with");
+            self.attributes.print(output);
+        }
+        output.semicolon();
+    });
+    DEFPRINT(AST_ImportMeta, function(self, output) {
+        output.print("import.meta");
+    });
+    DEFPRINT(AST_DynamicImport, function(self, output) {
+        output.print("import." + self.phase);
+        output.with_parens(function() {
+            self.args.forEach(function(arg, i) {
+                if (i) output.comma();
+                arg.print(output);
+            });
+        });
+    });
+
+    DEFPRINT(AST_NameMapping, function(self, output) {
+        var is_import = output.parent() instanceof AST_Import;
+        var definition = self.name.definition();
+        var foreign_name = self.foreign_name;
+        var names_are_different =
+            (definition && definition.mangled_name || self.name.name) !==
+            foreign_name.name;
+        if (!names_are_different &&
+            foreign_name.name === "*" &&
+            !!foreign_name.quote != !!self.name.quote) {
+                // export * as "*"
+            names_are_different = true;
+        }
+        var foreign_name_is_name = !foreign_name.quote;
+        if (names_are_different) {
+            if (is_import) {
+                if (foreign_name_is_name) {
+                    output.print(foreign_name.name);
+                } else {
+                    output.print_string(foreign_name.name, foreign_name.quote);
+                }
+            } else {
+                if (!self.name.quote) {
+                    self.name.print(output);
+                } else {
+                    output.print_string(self.name.name, self.name.quote);
+                }
+                
+            }
+            output.space();
+            output.print("as");
+            output.space();
+            if (is_import) {
+                self.name.print(output);
+            } else {
+                if (foreign_name_is_name) {
+                    output.print(foreign_name.name);
+                } else {
+                    output.print_string(foreign_name.name, foreign_name.quote);
+                }
+            }
+        } else {
+            if (!self.name.quote) {
+                self.name.print(output);
+            } else {
+                output.print_string(self.name.name, self.name.quote);
+            }
+        }
+    });
+
+    DEFPRINT(AST_Export, function(self, output) {
+        output.print("export");
+        output.space();
+        if (self.is_default) {
+            output.print("default");
+            output.space();
+        }
+        if (self.exported_names) {
+            if (self.exported_names.length === 1 &&
+                self.exported_names[0].name.name === "*" &&
+                !self.exported_names[0].name.quote) {
+                    self.exported_names[0].print(output);
+            } else {
+                output.print("{");
+                self.exported_names.forEach(function(name_export, i) {
+                    output.space();
+                    name_export.print(output);
+                    if (i < self.exported_names.length - 1) {
+                        output.print(",");
+                    }
+                });
+                output.space();
+                output.print("}");
+            }
+        } else if (self.exported_value) {
+            self.exported_value.print(output);
+        } else if (self.exported_definition) {
+            self.exported_definition.print(output);
+            if (self.exported_definition instanceof AST_Definitions) return;
+        }
+        if (self.module_name) {
+            output.space();
+            output.print("from");
+            output.space();
+            self.module_name.print(output);
+        }
+        if (self.attributes) {
+            output.print("with");
+            self.attributes.print(output);
+        }
+        if (self.exported_value
+                && !(self.exported_value instanceof AST_Defun ||
+                    self.exported_value instanceof AST_Function ||
+                    self.exported_value instanceof AST_Class)
+            || self.module_name
+            || self.exported_names
+        ) {
+            output.semicolon();
+        }
+    });
+
+    function parenthesize_for_noin(node, output, noin) {
+        var parens = false;
+        // need to take some precautions here:
+        //    https://github.com/mishoo/UglifyJS2/issues/60
+        if (noin) {
+            parens = walk(node, node => {
+                // Don't go into scopes -- except arrow functions:
+                // https://github.com/terser/terser/issues/1019#issuecomment-877642607
+                if (node instanceof AST_Scope && !(node instanceof AST_Arrow)) {
+                    return true;
+                }
+                if (
+                    node instanceof AST_Binary && node.operator == "in"
+                    || node instanceof AST_PrivateIn
+                ) {
+                    return walk_abort;  // makes walk() return true
+                }
+            });
+        }
+        node.print(output, parens);
+    }
+
+    DEFPRINT(AST_VarDefLike, function(self, output) {
+        self.name.print(output);
+        if (self.value) {
+            output.space();
+            output.print("=");
+            output.space();
+            var p = output.parent(1);
+            var noin = p instanceof AST_For || p instanceof AST_ForIn;
+            parenthesize_for_noin(self.value, output, noin);
+        }
+    });
+
+    /* -----[ other expressions ]----- */
+    DEFPRINT(AST_Call, function(self, output) {
+        self.expression.print(output);
+        if (self instanceof AST_New && self.args.length === 0)
+            return;
+        if (self.expression instanceof AST_Call || self.expression instanceof AST_Lambda) {
+            output.add_mapping(self.start);
+        }
+        if (self.optional) output.print("?.");
+        output.with_parens(function() {
+            self.args.forEach(function(expr, i) {
+                if (i) output.comma();
+                expr.print(output);
+            });
+        });
+    });
+    DEFPRINT(AST_New, function(self, output) {
+        output.print("new");
+        output.space();
+        AST_Call.prototype._codegen(self, output);
+    });
+
+    AST_Sequence.DEFMETHOD("_do_print", function(output) {
+        this.expressions.forEach(function(node, index) {
+            if (index > 0) {
+                output.comma();
+                if (output.should_break()) {
+                    output.newline();
+                    output.indent();
+                }
+            }
+            node.print(output);
+        });
+    });
+    DEFPRINT(AST_Sequence, function(self, output) {
+        self._do_print(output);
+        // var p = output.parent();
+        // if (p instanceof AST_Statement) {
+        //     output.with_indent(output.next_indent(), function(){
+        //         self._do_print(output);
+        //     });
+        // } else {
+        //     self._do_print(output);
+        // }
+    });
+    DEFPRINT(AST_Dot, function(self, output) {
+        var expr = self.expression;
+        expr.print(output);
+        var prop = self.property;
+        var print_computed = ALL_RESERVED_WORDS.has(prop)
+            ? output.option("ie8")
+            : !is_identifier_string(
+                prop,
+                output.option("ecma") >= 2015 && !output.option("safari10")
+            );
+
+        if (self.optional) output.print("?.");
+
+        if (print_computed) {
+            output.print("[");
+            output.add_mapping(self.end);
+            output.print_string(prop);
+            output.print("]");
+        } else {
+            if (expr instanceof AST_Number && expr.getValue() >= 0) {
+                if (!/[xa-f.)]/i.test(output.last())) {
+                    output.print(".");
+                }
+            }
+            if (!self.optional) output.print(".");
+            // the name after dot would be mapped about here.
+            output.add_mapping(self.end);
+            output.print_name(prop);
+        }
+    });
+    DEFPRINT(AST_DotHash, function(self, output) {
+        var expr = self.expression;
+        expr.print(output);
+        var prop = self.property;
+
+        if (self.optional) output.print("?");
+        output.print(".#");
+        output.add_mapping(self.end);
+        output.print_name(prop);
+    });
+    DEFPRINT(AST_Sub, function(self, output) {
+        self.expression.print(output);
+        if (self.optional) output.print("?.");
+        output.print("[");
+        self.property.print(output);
+        output.print("]");
+    });
+    DEFPRINT(AST_Chain, function(self, output) {
+        self.expression.print(output);
+    });
+    DEFPRINT(AST_UnaryPrefix, function(self, output) {
+        var op = self.operator;
+        if (op === "--" && output.last().endsWith("!")) {
+            // avoid printing "<!--"
+            output.print(" ");
+        }
+        output.print(op);
+        if (/^[a-z]/i.test(op)
+            || (/[+-]$/.test(op)
+                && self.expression instanceof AST_UnaryPrefix
+                && /^[+-]/.test(self.expression.operator))) {
+            output.space();
+        }
+        self.expression.print(output);
+    });
+    DEFPRINT(AST_UnaryPostfix, function(self, output) {
+        self.expression.print(output);
+        output.print(self.operator);
+    });
+    DEFPRINT(AST_Binary, function(self, output) {
+        var op = self.operator;
+        self.left.print(output);
+        if (op[0] == ">" /* ">>" ">>>" ">" ">=" */
+            && output.last().endsWith("--")) {
+            // space is mandatory to avoid outputting -->
+            output.print(" ");
+        } else {
+            // the space is optional depending on "beautify"
+            output.space();
+        }
+        output.print(op);
+        output.space();
+        self.right.print(output);
+    });
+    DEFPRINT(AST_Conditional, function(self, output) {
+        self.condition.print(output);
+        output.space();
+        output.print("?");
+        output.space();
+        self.consequent.print(output);
+        output.space();
+        output.colon();
+        self.alternative.print(output);
+    });
+
+    /* -----[ literals ]----- */
+    DEFPRINT(AST_Array, function(self, output) {
+        output.with_square(function() {
+            var a = self.elements, len = a.length;
+            if (len > 0) output.space();
+            a.forEach(function(exp, i) {
+                if (i) output.comma();
+                exp.print(output);
+                // If the final element is a hole, we need to make sure it
+                // doesn't look like a trailing comma, by inserting an actual
+                // trailing comma.
+                if (i === len - 1 && exp instanceof AST_Hole)
+                  output.comma();
+            });
+            if (len > 0) output.space();
+        });
+    });
+    DEFPRINT(AST_Object, function(self, output) {
+        if (self.properties.length > 0) output.with_block(function() {
+            self.properties.forEach(function(prop, i) {
+                if (i) {
+                    output.print(",");
+                    output.newline();
+                }
+                output.indent();
+                prop.print(output);
+            });
+            output.newline();
+        });
+        else print_braced_empty(self, output);
+    });
+    DEFPRINT(AST_Class, function(self, output) {
+        output.print("class");
+        output.space();
+        if (self.name) {
+            self.name.print(output);
+            output.space();
+        }
+        if (self.extends) {
+            var parens = (
+                   !(self.extends instanceof AST_SymbolRef)
+                && !(self.extends instanceof AST_PropAccess)
+                && !(self.extends instanceof AST_ClassExpression)
+                && !(self.extends instanceof AST_Function)
+            );
+            output.print("extends");
+            if (parens) {
+                output.print("(");
+            } else {
+                output.space();
+            }
+            self.extends.print(output);
+            if (parens) {
+                output.print(")");
+            } else {
+                output.space();
+            }
+        }
+        if (self.properties.length > 0) output.with_block(function() {
+            self.properties.forEach(function(prop, i) {
+                if (i) {
+                    output.newline();
+                }
+                output.indent();
+                prop.print(output);
+            });
+            output.newline();
+        });
+        else output.print("{}");
+    });
+    DEFPRINT(AST_NewTarget, function(self, output) {
+        output.print("new.target");
+    });
+
+    /** Prints a prop name. Returns whether it can be used as a shorthand. */
+    function print_property_name(key, quote, output) {
+        if (output.option("quote_keys")) {
+            output.print_string(key);
+            return false;
+        }
+        if ("" + +key == key && key >= 0) {
+            if (output.option("keep_numbers")) {
+                output.print(key);
+                return false;
+            }
+            output.print(make_num(key));
+            return false;
+        }
+        var print_string = ALL_RESERVED_WORDS.has(key)
+            ? output.option("ie8")
+            : (
+                output.option("ecma") < 2015 || output.option("safari10")
+                    ? !is_basic_identifier_string(key)
+                    : !is_identifier_string(key, true)
+            );
+        if (print_string || (quote && output.option("keep_quoted_props"))) {
+            output.print_string(key, quote);
+            return false;
+        }
+        output.print_name(key);
+        return true;
+    }
+
+    DEFPRINT(AST_ObjectKeyVal, function(self, output) {
+        function get_name(self) {
+            var def = self.definition();
+            return def ? def.mangled_name || def.name : self.name;
+        }
+
+        const try_shorthand = output.option("shorthand") && !(self.key instanceof AST_Node);
+        if (
+            try_shorthand
+            && self.value instanceof AST_Symbol
+            && get_name(self.value) === self.key
+            && !ALL_RESERVED_WORDS.has(self.key)
+        ) {
+            const was_shorthand = print_property_name(self.key, self.quote, output);
+            if (!was_shorthand) {
+                output.colon();
+                self.value.print(output);
+            }
+        } else if (
+            try_shorthand
+            && self.value instanceof AST_DefaultAssign
+            && self.value.left instanceof AST_Symbol
+            && get_name(self.value.left) === self.key
+        ) {
+            const was_shorthand = print_property_name(self.key, self.quote, output);
+            if (!was_shorthand) {
+                output.colon();
+                self.value.left.print(output);
+            }
+            output.space();
+            output.print("=");
+            output.space();
+            self.value.right.print(output);
+        } else {
+            if (!(self.key instanceof AST_Node)) {
+                print_property_name(self.key, self.quote, output);
+            } else {
+                output.with_square(function() {
+                    self.key.print(output);
+                });
+            }
+            output.colon();
+            self.value.print(output);
+        }
+    });
+    DEFPRINT(AST_ClassPrivateProperty, (self, output) => {
+        if (self.static) {
+            output.print("static");
+            output.space();
+        }
+
+        output.print("#");
+        
+        print_property_name(self.key.name, undefined, output);
+
+        if (self.value) {
+            output.print("=");
+            self.value.print(output);
+        }
+
+        output.semicolon();
+    });
+    DEFPRINT(AST_ClassProperty, (self, output) => {
+        if (self.static) {
+            output.print("static");
+            output.space();
+        }
+
+        if (self.key instanceof AST_SymbolClassProperty) {
+            print_property_name(self.key.name, self.quote, output);
+        } else {
+            output.print("[");
+            self.key.print(output);
+            output.print("]");
+        }
+
+        if (self.value) {
+            output.print("=");
+            self.value.print(output);
+        }
+
+        output.semicolon();
+    });
+    AST_ObjectProperty.DEFMETHOD("_print_getter_setter", function(type, is_private, output) {
+        var self = this;
+        if (self.static) {
+            output.print("static");
+            output.space();
+        }
+        if (type) {
+            output.print(type);
+            output.space();
+        }
+        if (self.key instanceof AST_SymbolMethod) {
+            if (is_private) output.print("#");
+            print_property_name(self.key.name, self.quote, output);
+            self.key.add_source_map(output);
+        } else {
+            output.with_square(function() {
+                self.key.print(output);
+            });
+        }
+        self.value._do_print(output, true);
+    });
+    DEFPRINT(AST_ObjectSetter, function(self, output) {
+        self._print_getter_setter("set", false, output);
+    });
+    DEFPRINT(AST_ObjectGetter, function(self, output) {
+        self._print_getter_setter("get", false, output);
+    });
+    DEFPRINT(AST_PrivateSetter, function(self, output) {
+        self._print_getter_setter("set", true, output);
+    });
+    DEFPRINT(AST_PrivateGetter, function(self, output) {
+        self._print_getter_setter("get", true, output);
+    });
+    DEFPRINT(AST_ConciseMethod, function(self, output) {
+        var type;
+        if (self.value.is_generator && self.value.async) {
+            type = "async*";
+        } else if (self.value.is_generator) {
+            type = "*";
+        } else if (self.value.async) {
+            type = "async";
+        }
+        self._print_getter_setter(type, false, output);
+    });
+    DEFPRINT(AST_PrivateMethod, function(self, output) {
+        var type;
+        if (self.value.is_generator && self.value.async) {
+            type = "async*";
+        } else if (self.value.is_generator) {
+            type = "*";
+        } else if (self.value.async) {
+            type = "async";
+        }
+        self._print_getter_setter(type, true, output);
+    });
+    DEFPRINT(AST_PrivateIn, function(self, output) {
+        self.key.print(output);
+        output.space();
+        output.print("in");
+        output.space();
+        self.value.print(output);
+    });
+    DEFPRINT(AST_SymbolPrivateProperty, function(self, output) {
+        output.print("#" + self.name);
+    });
+    DEFPRINT(AST_ClassStaticBlock, function (self, output) {
+        output.print("static");
+        output.space();
+        print_braced(self, output);
+    });
+    AST_Symbol.DEFMETHOD("_do_print", function(output) {
+        var def = this.definition();
+        output.print_name(def ? def.mangled_name || def.name : this.name);
+    });
+    DEFPRINT(AST_Symbol, function (self, output) {
+        self._do_print(output);
+    });
+    DEFPRINT(AST_Hole, noop);
+    DEFPRINT(AST_This, function(self, output) {
+        output.print("this");
+    });
+    DEFPRINT(AST_Super, function(self, output) {
+        output.print("super");
+    });
+    DEFPRINT(AST_Constant, function(self, output) {
+        output.print(self.getValue());
+    });
+    DEFPRINT(AST_String, function(self, output) {
+        output.print_string(self.getValue(), self.quote, output.in_directive);
+    });
+    DEFPRINT(AST_Number, function(self, output) {
+        if ((output.option("keep_numbers") || output.use_asm) && self.raw) {
+            output.print(self.raw);
+        } else {
+            output.print(make_num(self.getValue()));
+        }
+    });
+    DEFPRINT(AST_BigInt, function(self, output) {
+        if (output.option("keep_numbers") && self.raw) {
+            output.print(self.raw);
+        } else {
+            output.print(self.getValue() + "n");
+        }
+    });
+
+    const r_slash_script = /(<\s*\/\s*script)/i;
+    const r_starts_with_script = /^\s*script/i;
+    const slash_script_replace = (_, $1) => $1.replace("/", "\\/");
+    DEFPRINT(AST_RegExp, function(self, output) {
+        let { source, flags } = self.getValue();
+        source = regexp_source_fix(source);
+        flags = flags ? sort_regexp_flags(flags) : "";
+
+        // Avoid outputting end of script tag
+        source = source.replace(r_slash_script, slash_script_replace);
+        if (r_starts_with_script.test(source) && output.last().endsWith("<")) {
+            output.print(" ");
+        }
+
+        output.print(output.to_utf8(`/${source}/${flags}`, false, true));
+
+        const parent = output.parent();
+        if (
+            parent instanceof AST_Binary
+            && /^\w/.test(parent.operator)
+            && parent.left === self
+        ) {
+            output.print(" ");
+        }
+    });
+
+    /** if, for, while, may or may not have braces surrounding its body */
+    function print_maybe_braced_body(stat, output) {
+        if (output.option("braces")) {
+            make_block(stat, output);
+        } else {
+            if (!stat || stat instanceof AST_EmptyStatement)
+                output.force_semicolon();
+            else if ((stat instanceof AST_DefinitionsLike && !(stat instanceof AST_Var)) || stat instanceof AST_Class)
+                make_block(stat, output);
+            else
+                stat.print(output);
+        }
+    }
+
+    function best_of(a) {
+        var best = a[0], len = best.length;
+        for (var i = 1; i < a.length; ++i) {
+            if (a[i].length < len) {
+                best = a[i];
+                len = best.length;
+            }
+        }
+        return best;
+    }
+
+    function make_num(num) {
+        var str = num.toString(10).replace(/^0\./, ".").replace("e+", "e");
+        var candidates = [ str ];
+        if (Math.floor(num) === num) {
+            if (num < 0) {
+                candidates.push("-0x" + (-num).toString(16).toLowerCase());
+            } else {
+                candidates.push("0x" + num.toString(16).toLowerCase());
+            }
+        }
+        var match, len, digits;
+        if (match = /^\.0+/.exec(str)) {
+            len = match[0].length;
+            digits = str.slice(len);
+            candidates.push(digits + "e-" + (digits.length + len - 1));
+        } else if (match = /0+$/.exec(str)) {
+            len = match[0].length;
+            candidates.push(str.slice(0, -len) + "e" + len);
+        } else if (match = /^(\d)\.(\d+)e(-?\d+)$/.exec(str)) {
+            candidates.push(match[1] + match[2] + "e" + (match[3] - match[2].length));
+        }
+        return best_of(candidates);
+    }
+
+    function make_block(stmt, output) {
+        if (!stmt || stmt instanceof AST_EmptyStatement)
+            output.print("{}");
+        else if (stmt instanceof AST_BlockStatement)
+            stmt.print(output);
+        else output.with_block(function() {
+            output.indent();
+            stmt.print(output);
+            output.newline();
+        });
+    }
+
+    /* -----[ source map generators ]----- */
+
+    function DEFMAP(nodetype, generator) {
+        nodetype.forEach(function(nodetype) {
+            nodetype.DEFMETHOD("add_source_map", generator);
+        });
+    }
+
+    DEFMAP([
+        // We could easily add info for ALL nodes, but it seems to me that
+        // would be quite wasteful, hence this noop in the base class.
+        AST_Node,
+        // since the label symbol will mark it
+        AST_LabeledStatement,
+        AST_Toplevel,
+    ], noop);
+
+    // XXX: I'm not exactly sure if we need it for all of these nodes,
+    // or if we should add even more.
+    DEFMAP([
+        AST_Array,
+        AST_BlockStatement,
+        AST_Catch,
+        AST_Class,
+        AST_Constant,
+        AST_Debugger,
+        AST_DefinitionsLike,
+        AST_Directive,
+        AST_Finally,
+        AST_Jump,
+        AST_Lambda,
+        AST_New,
+        AST_Object,
+        AST_StatementWithBody,
+        AST_Symbol,
+        AST_Switch,
+        AST_SwitchBranch,
+        AST_TemplateString,
+        AST_TemplateSegment,
+        AST_Try,
+    ], function(output) {
+        output.add_mapping(this.start);
+    });
+
+    DEFMAP([
+        AST_ObjectGetter,
+        AST_ObjectSetter,
+        AST_PrivateGetter,
+        AST_PrivateSetter,
+        AST_ConciseMethod,
+        AST_PrivateMethod,
+    ], function(output) {
+        output.add_mapping(this.start, false /*name handled below*/);
+    });
+
+    DEFMAP([
+        AST_SymbolMethod,
+        AST_SymbolPrivateProperty
+    ], function(output) {
+        const tok_type = this.end && this.end.type;
+        if (tok_type === "name" || tok_type === "privatename") {
+            output.add_mapping(this.end, this.name);
+        } else {
+            output.add_mapping(this.end);
+        }
+    });
+
+    DEFMAP([ AST_ObjectProperty ], function(output) {
+        output.add_mapping(this.start, this.key);
+    });
+})();
+
+export {
+    OutputStream,
+};
Index: frontend/node_modules/terser/lib/parse.js
===================================================================
--- frontend/node_modules/terser/lib/parse.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/parse.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,3660 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+    Parser based on parse-js (http://marijn.haverbeke.nl/parse-js/).
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+"use strict";
+
+import {
+    characters,
+    defaults,
+    makePredicate,
+    set_annotation,
+} from "./utils/index.js";
+import {
+    AST_Accessor,
+    AST_Array,
+    AST_Arrow,
+    AST_Assign,
+    AST_Await,
+    AST_BigInt,
+    AST_Binary,
+    AST_BlockStatement,
+    AST_Break,
+    AST_Call,
+    AST_Case,
+    AST_Catch,
+    AST_Chain,
+    AST_ClassExpression,
+    AST_ClassPrivateProperty,
+    AST_ClassProperty,
+    AST_ClassStaticBlock,
+    AST_ConciseMethod,
+    AST_PrivateIn,
+    AST_PrivateGetter,
+    AST_PrivateMethod,
+    AST_PrivateSetter,
+    AST_Conditional,
+    AST_Const,
+    AST_Continue,
+    AST_Debugger,
+    AST_Default,
+    AST_DefaultAssign,
+    AST_DefClass,
+    AST_Definitions,
+    AST_DefinitionsLike,
+    AST_Defun,
+    AST_Destructuring,
+    AST_Directive,
+    AST_Do,
+    AST_Dot,
+    AST_DotHash,
+    AST_EmptyStatement,
+    AST_Expansion,
+    AST_Export,
+    AST_False,
+    AST_Finally,
+    AST_For,
+    AST_ForIn,
+    AST_ForOf,
+    AST_Function,
+    AST_Hole,
+    AST_If,
+    AST_DynamicImport,
+    AST_Import,
+    AST_ImportMeta,
+    AST_Infinity,
+    AST_IterationStatement,
+    AST_Label,
+    AST_LabeledStatement,
+    AST_LabelRef,
+    AST_Let,
+    AST_NameMapping,
+    AST_New,
+    AST_NewTarget,
+    AST_Null,
+    AST_Number,
+    AST_Object,
+    AST_ObjectGetter,
+    AST_ObjectKeyVal,
+    AST_ObjectProperty,
+    AST_ObjectSetter,
+    AST_PrefixedTemplateString,
+    AST_PropAccess,
+    AST_RegExp,
+    AST_Return,
+    AST_Sequence,
+    AST_SimpleStatement,
+    AST_String,
+    AST_Sub,
+    AST_Super,
+    AST_Switch,
+    AST_SymbolCatch,
+    AST_SymbolClass,
+    AST_SymbolClassProperty,
+    AST_SymbolConst,
+    AST_SymbolDeclaration,
+    AST_SymbolDefClass,
+    AST_SymbolDefun,
+    AST_SymbolExport,
+    AST_SymbolExportForeign,
+    AST_SymbolFunarg,
+    AST_SymbolImport,
+    AST_SymbolImportForeign,
+    AST_SymbolLambda,
+    AST_SymbolLet,
+    AST_SymbolMethod,
+    AST_SymbolRef,
+    AST_SymbolVar,
+    AST_SymbolUsing,
+    AST_TemplateSegment,
+    AST_TemplateString,
+    AST_This,
+    AST_SymbolPrivateProperty,
+    AST_Throw,
+    AST_Token,
+    AST_Toplevel,
+    AST_True,
+    AST_Try,
+    AST_TryBlock,
+    AST_UnaryPostfix,
+    AST_UnaryPrefix,
+    AST_Using,
+    AST_UsingDef,
+    AST_Var,
+    AST_VarDef,
+    AST_While,
+    AST_With,
+    AST_Yield,
+    _INLINE,
+    _NOINLINE,
+    _PURE,
+    _KEY,
+    _MANGLEPROP,
+} from "./ast.js";
+
+var LATEST_RAW = "";  // Only used for numbers and template strings
+var TEMPLATE_RAWS = new Map();  // Raw template strings
+
+var KEYWORDS = "break case catch class const continue debugger default delete do else export extends finally for function if in instanceof let new return switch throw try typeof var void while with";
+var KEYWORDS_ATOM = "false null true";
+var RESERVED_WORDS = "enum import super this " + KEYWORDS_ATOM + " " + KEYWORDS;
+var ALL_RESERVED_WORDS = "implements interface package private protected public static " + RESERVED_WORDS;
+var KEYWORDS_BEFORE_EXPRESSION = "return new delete throw else case yield await";
+
+KEYWORDS = makePredicate(KEYWORDS);
+RESERVED_WORDS = makePredicate(RESERVED_WORDS);
+KEYWORDS_BEFORE_EXPRESSION = makePredicate(KEYWORDS_BEFORE_EXPRESSION);
+KEYWORDS_ATOM = makePredicate(KEYWORDS_ATOM);
+ALL_RESERVED_WORDS = makePredicate(ALL_RESERVED_WORDS);
+
+var OPERATOR_CHARS = makePredicate(characters("+-*&%=<>!?|~^"));
+
+var RE_HEX_NUMBER = /^0x[0-9a-f]+$/i;
+var RE_OCT_NUMBER = /^0[0-7]+$/;
+var RE_ES6_OCT_NUMBER = /^0o[0-7]+$/i;
+var RE_BIN_NUMBER = /^0b[01]+$/i;
+var RE_DEC_NUMBER = /^\d*\.?\d*(?:e[+-]?\d*(?:\d\.?|\.?\d)\d*)?$/i;
+var RE_BIG_INT = /^(0[xob])?[0-9a-f]+n$/i;
+
+var RE_KEYWORD_RELATIONAL_OPERATORS = /in(?:stanceof)?/y;
+
+var OPERATORS = makePredicate([
+    "in",
+    "instanceof",
+    "typeof",
+    "new",
+    "void",
+    "delete",
+    "++",
+    "--",
+    "+",
+    "-",
+    "!",
+    "~",
+    "&",
+    "|",
+    "^",
+    "*",
+    "**",
+    "/",
+    "%",
+    ">>",
+    "<<",
+    ">>>",
+    "<",
+    ">",
+    "<=",
+    ">=",
+    "==",
+    "===",
+    "!=",
+    "!==",
+    "?",
+    "=",
+    "+=",
+    "-=",
+    "||=",
+    "&&=",
+    "??=",
+    "/=",
+    "*=",
+    "**=",
+    "%=",
+    ">>=",
+    "<<=",
+    ">>>=",
+    "|=",
+    "^=",
+    "&=",
+    "&&",
+    "??",
+    "||",
+]);
+
+var WHITESPACE_CHARS = makePredicate(characters(" \u00a0\n\r\t\f\u000b\u200b\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u2028\u2029\u202f\u205f\u3000\uFEFF"));
+
+var NEWLINE_CHARS = makePredicate(characters("\n\r\u2028\u2029"));
+
+var PUNC_AFTER_EXPRESSION = makePredicate(characters(";]),:"));
+
+var PUNC_BEFORE_EXPRESSION = makePredicate(characters("[{(,;:"));
+
+var PUNC_CHARS = makePredicate(characters("[]{}(),;:"));
+
+/* -----[ Tokenizer ]----- */
+
+// surrogate safe regexps adapted from https://github.com/mathiasbynens/unicode-8.0.0/tree/89b412d8a71ecca9ed593d9e9fa073ab64acfebe/Binary_Property
+var UNICODE = {
+    ID_Start: /[$A-Z_a-z\xAA\xB5\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0-\u08B4\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0AF9\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58-\u0C5A\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D5F-\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1380-\u138F\u13A0-\u13F5\u13F8-\u13FD\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u1A00-\u1A16\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2118-\u211D\u2124\u2126\u2128\u212A-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2160-\u2188\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303C\u3041-\u3096\u309B-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FD5\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA7AD\uA7B0-\uA7B7\uA7F7-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA8FD\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uA9E0-\uA9E4\uA9E6-\uA9EF\uA9FA-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB65\uAB70-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD40-\uDD74\uDE80-\uDE9C\uDEA0-\uDED0\uDF00-\uDF1F\uDF30-\uDF4A\uDF50-\uDF75\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC60-\uDC76\uDC80-\uDC9E\uDCE0-\uDCF2\uDCF4\uDCF5\uDD00-\uDD15\uDD20-\uDD39\uDD80-\uDDB7\uDDBE\uDDBF\uDE00\uDE10-\uDE13\uDE15-\uDE17\uDE19-\uDE33\uDE60-\uDE7C\uDE80-\uDE9C\uDEC0-\uDEC7\uDEC9-\uDEE4\uDF00-\uDF35\uDF40-\uDF55\uDF60-\uDF72\uDF80-\uDF91]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2]|\uD804[\uDC03-\uDC37\uDC83-\uDCAF\uDCD0-\uDCE8\uDD03-\uDD26\uDD50-\uDD72\uDD76\uDD83-\uDDB2\uDDC1-\uDDC4\uDDDA\uDDDC\uDE00-\uDE11\uDE13-\uDE2B\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEDE\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3D\uDF50\uDF5D-\uDF61]|\uD805[\uDC80-\uDCAF\uDCC4\uDCC5\uDCC7\uDD80-\uDDAE\uDDD8-\uDDDB\uDE00-\uDE2F\uDE44\uDE80-\uDEAA\uDF00-\uDF19]|\uD806[\uDCA0-\uDCDF\uDCFF\uDEC0-\uDEF8]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|[\uD80C\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDED0-\uDEED\uDF00-\uDF2F\uDF40-\uDF43\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDF00-\uDF44\uDF50\uDF93-\uDF9F]|\uD82C[\uDC00\uDC01]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB]|\uD83A[\uDC00-\uDCC4]|\uD83B[\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD869[\uDC00-\uDED6\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1]|\uD87E[\uDC00-\uDE1D]/,
+    ID_Continue: /(?:[$0-9A-Z_a-z\xAA\xB5\xB7\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0300-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u0483-\u0487\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u0591-\u05BD\u05BF\u05C1\u05C2\u05C4\u05C5\u05C7\u05D0-\u05EA\u05F0-\u05F2\u0610-\u061A\u0620-\u0669\u066E-\u06D3\u06D5-\u06DC\u06DF-\u06E8\u06EA-\u06FC\u06FF\u0710-\u074A\u074D-\u07B1\u07C0-\u07F5\u07FA\u0800-\u082D\u0840-\u085B\u08A0-\u08B4\u08E3-\u0963\u0966-\u096F\u0971-\u0983\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BC-\u09C4\u09C7\u09C8\u09CB-\u09CE\u09D7\u09DC\u09DD\u09DF-\u09E3\u09E6-\u09F1\u0A01-\u0A03\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A3C\u0A3E-\u0A42\u0A47\u0A48\u0A4B-\u0A4D\u0A51\u0A59-\u0A5C\u0A5E\u0A66-\u0A75\u0A81-\u0A83\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABC-\u0AC5\u0AC7-\u0AC9\u0ACB-\u0ACD\u0AD0\u0AE0-\u0AE3\u0AE6-\u0AEF\u0AF9\u0B01-\u0B03\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3C-\u0B44\u0B47\u0B48\u0B4B-\u0B4D\u0B56\u0B57\u0B5C\u0B5D\u0B5F-\u0B63\u0B66-\u0B6F\u0B71\u0B82\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BBE-\u0BC2\u0BC6-\u0BC8\u0BCA-\u0BCD\u0BD0\u0BD7\u0BE6-\u0BEF\u0C00-\u0C03\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D-\u0C44\u0C46-\u0C48\u0C4A-\u0C4D\u0C55\u0C56\u0C58-\u0C5A\u0C60-\u0C63\u0C66-\u0C6F\u0C81-\u0C83\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBC-\u0CC4\u0CC6-\u0CC8\u0CCA-\u0CCD\u0CD5\u0CD6\u0CDE\u0CE0-\u0CE3\u0CE6-\u0CEF\u0CF1\u0CF2\u0D01-\u0D03\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D-\u0D44\u0D46-\u0D48\u0D4A-\u0D4E\u0D57\u0D5F-\u0D63\u0D66-\u0D6F\u0D7A-\u0D7F\u0D82\u0D83\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DCA\u0DCF-\u0DD4\u0DD6\u0DD8-\u0DDF\u0DE6-\u0DEF\u0DF2\u0DF3\u0E01-\u0E3A\u0E40-\u0E4E\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB9\u0EBB-\u0EBD\u0EC0-\u0EC4\u0EC6\u0EC8-\u0ECD\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F18\u0F19\u0F20-\u0F29\u0F35\u0F37\u0F39\u0F3E-\u0F47\u0F49-\u0F6C\u0F71-\u0F84\u0F86-\u0F97\u0F99-\u0FBC\u0FC6\u1000-\u1049\u1050-\u109D\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u135D-\u135F\u1369-\u1371\u1380-\u138F\u13A0-\u13F5\u13F8-\u13FD\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1714\u1720-\u1734\u1740-\u1753\u1760-\u176C\u176E-\u1770\u1772\u1773\u1780-\u17D3\u17D7\u17DC\u17DD\u17E0-\u17E9\u180B-\u180D\u1810-\u1819\u1820-\u1877\u1880-\u18AA\u18B0-\u18F5\u1900-\u191E\u1920-\u192B\u1930-\u193B\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19DA\u1A00-\u1A1B\u1A20-\u1A5E\u1A60-\u1A7C\u1A7F-\u1A89\u1A90-\u1A99\u1AA7\u1AB0-\u1ABD\u1B00-\u1B4B\u1B50-\u1B59\u1B6B-\u1B73\u1B80-\u1BF3\u1C00-\u1C37\u1C40-\u1C49\u1C4D-\u1C7D\u1CD0-\u1CD2\u1CD4-\u1CF6\u1CF8\u1CF9\u1D00-\u1DF5\u1DFC-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u200C\u200D\u203F\u2040\u2054\u2071\u207F\u2090-\u209C\u20D0-\u20DC\u20E1\u20E5-\u20F0\u2102\u2107\u210A-\u2113\u2115\u2118-\u211D\u2124\u2126\u2128\u212A-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2160-\u2188\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D7F-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2DE0-\u2DFF\u3005-\u3007\u3021-\u302F\u3031-\u3035\u3038-\u303C\u3041-\u3096\u3099-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FD5\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66F\uA674-\uA67D\uA67F-\uA6F1\uA717-\uA71F\uA722-\uA788\uA78B-\uA7AD\uA7B0-\uA7B7\uA7F7-\uA827\uA840-\uA873\uA880-\uA8C4\uA8D0-\uA8D9\uA8E0-\uA8F7\uA8FB\uA8FD\uA900-\uA92D\uA930-\uA953\uA960-\uA97C\uA980-\uA9C0\uA9CF-\uA9D9\uA9E0-\uA9FE\uAA00-\uAA36\uAA40-\uAA4D\uAA50-\uAA59\uAA60-\uAA76\uAA7A-\uAAC2\uAADB-\uAADD\uAAE0-\uAAEF\uAAF2-\uAAF6\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB65\uAB70-\uABEA\uABEC\uABED\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE00-\uFE0F\uFE20-\uFE2F\uFE33\uFE34\uFE4D-\uFE4F\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF3F\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD40-\uDD74\uDDFD\uDE80-\uDE9C\uDEA0-\uDED0\uDEE0\uDF00-\uDF1F\uDF30-\uDF4A\uDF50-\uDF7A\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCA0-\uDCA9\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC60-\uDC76\uDC80-\uDC9E\uDCE0-\uDCF2\uDCF4\uDCF5\uDD00-\uDD15\uDD20-\uDD39\uDD80-\uDDB7\uDDBE\uDDBF\uDE00-\uDE03\uDE05\uDE06\uDE0C-\uDE13\uDE15-\uDE17\uDE19-\uDE33\uDE38-\uDE3A\uDE3F\uDE60-\uDE7C\uDE80-\uDE9C\uDEC0-\uDEC7\uDEC9-\uDEE6\uDF00-\uDF35\uDF40-\uDF55\uDF60-\uDF72\uDF80-\uDF91]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2]|\uD804[\uDC00-\uDC46\uDC66-\uDC6F\uDC7F-\uDCBA\uDCD0-\uDCE8\uDCF0-\uDCF9\uDD00-\uDD34\uDD36-\uDD3F\uDD50-\uDD73\uDD76\uDD80-\uDDC4\uDDCA-\uDDCC\uDDD0-\uDDDA\uDDDC\uDE00-\uDE11\uDE13-\uDE37\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEEA\uDEF0-\uDEF9\uDF00-\uDF03\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3C-\uDF44\uDF47\uDF48\uDF4B-\uDF4D\uDF50\uDF57\uDF5D-\uDF63\uDF66-\uDF6C\uDF70-\uDF74]|\uD805[\uDC80-\uDCC5\uDCC7\uDCD0-\uDCD9\uDD80-\uDDB5\uDDB8-\uDDC0\uDDD8-\uDDDD\uDE00-\uDE40\uDE44\uDE50-\uDE59\uDE80-\uDEB7\uDEC0-\uDEC9\uDF00-\uDF19\uDF1D-\uDF2B\uDF30-\uDF39]|\uD806[\uDCA0-\uDCE9\uDCFF\uDEC0-\uDEF8]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|[\uD80C\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE60-\uDE69\uDED0-\uDEED\uDEF0-\uDEF4\uDF00-\uDF36\uDF40-\uDF43\uDF50-\uDF59\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDF00-\uDF44\uDF50-\uDF7E\uDF8F-\uDF9F]|\uD82C[\uDC00\uDC01]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99\uDC9D\uDC9E]|\uD834[\uDD65-\uDD69\uDD6D-\uDD72\uDD7B-\uDD82\uDD85-\uDD8B\uDDAA-\uDDAD\uDE42-\uDE44]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB\uDFCE-\uDFFF]|\uD836[\uDE00-\uDE36\uDE3B-\uDE6C\uDE75\uDE84\uDE9B-\uDE9F\uDEA1-\uDEAF]|\uD83A[\uDC00-\uDCC4\uDCD0-\uDCD6]|\uD83B[\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD869[\uDC00-\uDED6\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1]|\uD87E[\uDC00-\uDE1D]|\uDB40[\uDD00-\uDDEF])+/,
+};
+
+function get_full_char(str, pos) {
+    if (is_surrogate_pair_head(str.charCodeAt(pos))) {
+        if (is_surrogate_pair_tail(str.charCodeAt(pos + 1))) {
+            return str.charAt(pos) + str.charAt(pos + 1);
+        }
+    } else if (is_surrogate_pair_tail(str.charCodeAt(pos))) {
+        if (is_surrogate_pair_head(str.charCodeAt(pos - 1))) {
+            return str.charAt(pos - 1) + str.charAt(pos);
+        }
+    }
+    return str.charAt(pos);
+}
+
+function get_full_char_code(str, pos) {
+    // https://en.wikipedia.org/wiki/Universal_Character_Set_characters#Surrogates
+    if (is_surrogate_pair_head(str.charCodeAt(pos))) {
+        return 0x10000 + (str.charCodeAt(pos) - 0xd800 << 10) + str.charCodeAt(pos + 1) - 0xdc00;
+    }
+    return str.charCodeAt(pos);
+}
+
+function get_full_char_length(str) {
+    var surrogates = 0;
+
+    for (var i = 0; i < str.length; i++) {
+        if (is_surrogate_pair_head(str.charCodeAt(i)) && is_surrogate_pair_tail(str.charCodeAt(i + 1))) {
+            surrogates++;
+            i++;
+        }
+    }
+
+    return str.length - surrogates;
+}
+
+function from_char_code(code) {
+    // Based on https://github.com/mathiasbynens/String.fromCodePoint/blob/master/fromcodepoint.js
+    if (code > 0xFFFF) {
+        code -= 0x10000;
+        return (String.fromCharCode((code >> 10) + 0xD800) +
+            String.fromCharCode((code % 0x400) + 0xDC00));
+    }
+    return String.fromCharCode(code);
+}
+
+function is_surrogate_pair_head(code) {
+    return code >= 0xd800 && code <= 0xdbff;
+}
+
+function is_surrogate_pair_tail(code) {
+    return code >= 0xdc00 && code <= 0xdfff;
+}
+
+function is_digit(code) {
+    return code >= 48 && code <= 57;
+}
+
+function is_identifier_start(ch) {
+    return UNICODE.ID_Start.test(ch);
+}
+
+function is_identifier_char(ch) {
+    return UNICODE.ID_Continue.test(ch);
+}
+
+const BASIC_IDENT = /^[a-z_$][a-z0-9_$]*$/i;
+
+function is_basic_identifier_string(str) {
+    return BASIC_IDENT.test(str);
+}
+
+function is_identifier_string(str, allow_surrogates) {
+    if (BASIC_IDENT.test(str)) {
+        return true;
+    }
+    if (!allow_surrogates && /[\ud800-\udfff]/.test(str)) {
+        return false;
+    }
+    var match = UNICODE.ID_Start.exec(str);
+    if (!match || match.index !== 0) {
+        return false;
+    }
+
+    str = str.slice(match[0].length);
+    if (!str) {
+        return true;
+    }
+
+    match = UNICODE.ID_Continue.exec(str);
+    return !!match && match[0].length === str.length;
+}
+
+function parse_js_number(num, allow_e = true) {
+    if (!allow_e && num.includes("e")) {
+        return NaN;
+    }
+    if (RE_HEX_NUMBER.test(num)) {
+        return parseInt(num.substr(2), 16);
+    } else if (RE_OCT_NUMBER.test(num)) {
+        return parseInt(num.substr(1), 8);
+    } else if (RE_ES6_OCT_NUMBER.test(num)) {
+        return parseInt(num.substr(2), 8);
+    } else if (RE_BIN_NUMBER.test(num)) {
+        return parseInt(num.substr(2), 2);
+    } else if (RE_DEC_NUMBER.test(num)) {
+        return parseFloat(num);
+    } else {
+        var val = parseFloat(num);
+        if (val == num) return val;
+    }
+}
+
+class JS_Parse_Error extends Error {
+    constructor(message, filename, line, col, pos) {
+        super();
+
+        this.name = "SyntaxError";
+        this.message = message;
+        this.filename = filename;
+        this.line = line;
+        this.col = col;
+        this.pos = pos;
+    }
+}
+
+function js_error(message, filename, line, col, pos) {
+    throw new JS_Parse_Error(message, filename, line, col, pos);
+}
+
+function is_token(token, type, val) {
+    return token.type == type && (val == null || token.value == val);
+}
+
+var EX_EOF = {};
+
+function tokenizer($TEXT, filename, html5_comments, shebang) {
+    var S = {
+        text            : $TEXT,
+        filename        : filename,
+        pos             : 0,
+        tokpos          : 0,
+        line            : 1,
+        tokline         : 0,
+        col             : 0,
+        tokcol          : 0,
+        newline_before  : false,
+        regex_allowed   : false,
+        brace_counter   : 0,
+        template_braces : [],
+        comments_before : [],
+        directives      : {},
+        directive_stack : []
+    };
+
+    function peek() { return get_full_char(S.text, S.pos); }
+
+    // Used because parsing ?. involves a lookahead for a digit
+    function is_option_chain_op() {
+        const must_be_dot = S.text.charCodeAt(S.pos + 1) === 46;
+        if (!must_be_dot) return false;
+
+        const cannot_be_digit = S.text.charCodeAt(S.pos + 2);
+        return cannot_be_digit < 48 || cannot_be_digit > 57;
+    }
+
+    function next(signal_eof, in_string) {
+        var ch = get_full_char(S.text, S.pos++);
+        if (signal_eof && !ch)
+            throw EX_EOF;
+        if (NEWLINE_CHARS.has(ch)) {
+            S.newline_before = S.newline_before || !in_string;
+            ++S.line;
+            S.col = 0;
+            if (ch == "\r" && peek() == "\n") {
+                // treat a \r\n sequence as a single \n
+                ++S.pos;
+                ch = "\n";
+            }
+        } else {
+            if (ch.length > 1) {
+                ++S.pos;
+                ++S.col;
+            }
+            ++S.col;
+        }
+        return ch;
+    }
+
+    function forward(i) {
+        while (i--) next();
+    }
+
+    function looking_at(str) {
+        return S.text.substr(S.pos, str.length) == str;
+    }
+
+    function find_eol() {
+        var text = S.text;
+        for (var i = S.pos, n = S.text.length; i < n; ++i) {
+            var ch = text[i];
+            if (NEWLINE_CHARS.has(ch))
+                return i;
+        }
+        return -1;
+    }
+
+    function find(what, signal_eof) {
+        var pos = S.text.indexOf(what, S.pos);
+        if (signal_eof && pos == -1) throw EX_EOF;
+        return pos;
+    }
+
+    function start_token() {
+        S.tokline = S.line;
+        S.tokcol = S.col;
+        S.tokpos = S.pos;
+    }
+
+    var prev_was_dot = false;
+    var previous_token = null;
+    function token(type, value, is_comment) {
+        S.regex_allowed = ((type == "operator" && !UNARY_POSTFIX.has(value)) ||
+                           (type == "keyword" && KEYWORDS_BEFORE_EXPRESSION.has(value)) ||
+                           (type == "punc" && PUNC_BEFORE_EXPRESSION.has(value))) ||
+                           (type == "arrow");
+        if (type == "punc" && (value == "." || value == "?.")) {
+            prev_was_dot = true;
+        } else if (!is_comment) {
+            prev_was_dot = false;
+        }
+        const line     = S.tokline;
+        const col      = S.tokcol;
+        const pos      = S.tokpos;
+        const nlb      = S.newline_before;
+        const file     = filename;
+        let comments_before = [];
+        let comments_after  = [];
+
+        if (!is_comment) {
+            comments_before = S.comments_before;
+            comments_after = S.comments_before = [];
+        }
+        S.newline_before = false;
+        const tok = new AST_Token(type, value, line, col, pos, nlb, comments_before, comments_after, file);
+
+        if (!is_comment) previous_token = tok;
+        return tok;
+    }
+
+    function skip_whitespace() {
+        while (WHITESPACE_CHARS.has(peek()))
+            next();
+    }
+
+    function peek_next_token_start_or_newline() {
+        var pos = S.pos;
+        for (var in_multiline_comment = false; pos < S.text.length; ) {
+            var ch = get_full_char(S.text, pos);
+            if (NEWLINE_CHARS.has(ch)) {
+                return { char: ch, pos: pos };
+            } else if (in_multiline_comment) {
+                if (ch == "*" && get_full_char(S.text, pos + 1) == "/") {
+                    pos += 2;
+                    in_multiline_comment = false;
+                } else {
+                    pos++;
+                }
+            } else if (!WHITESPACE_CHARS.has(ch)) {
+                if (ch == "/") {
+                    var next_ch = get_full_char(S.text, pos + 1);
+                    if (next_ch == "/") {
+                        pos = find_eol();
+                        return { char: get_full_char(S.text, pos), pos: pos };
+                    } else if (next_ch == "*") {
+                        in_multiline_comment = true;
+                        pos += 2;
+                        continue;
+                    }
+                }
+                return { char: ch, pos: pos };
+            } else {
+                pos++;
+            }
+        }
+        return { char: null, pos: pos };
+    }
+
+    function ch_starts_binding_identifier(ch, pos) {
+        if (ch == "\\") {
+            return true;
+        } else if (is_identifier_start(ch)) {
+            RE_KEYWORD_RELATIONAL_OPERATORS.lastIndex = pos;
+            if (RE_KEYWORD_RELATIONAL_OPERATORS.test(S.text)) {
+                var after = get_full_char(S.text, RE_KEYWORD_RELATIONAL_OPERATORS.lastIndex);
+                if (!is_identifier_char(after) && after != "\\") {
+                    // "in" or "instanceof" are keywords, not binding identifiers
+                    return false; 
+                }
+            }
+            return true;
+        }
+        return false;
+    }
+
+    function read_while(pred) {
+        var ret = "", ch, i = 0;
+        while ((ch = peek()) && pred(ch, i++))
+            ret += next();
+        return ret;
+    }
+
+    function parse_error(err) {
+        js_error(err, filename, S.tokline, S.tokcol, S.tokpos);
+    }
+
+    function read_num(prefix) {
+        var has_e = false, after_e = false, has_x = false, has_dot = prefix == ".", is_big_int = false, numeric_separator = false;
+        var num = read_while(function(ch, i) {
+            if (is_big_int) return false;
+
+            var code = ch.charCodeAt(0);
+            switch (code) {
+              case 95: // _
+                return (numeric_separator = true);
+              case 98: case 66: // bB
+                return (has_x = true); // Can occur in hex sequence, don't return false yet
+              case 111: case 79: // oO
+              case 120: case 88: // xX
+                return has_x ? false : (has_x = true);
+              case 101: case 69: // eE
+                return has_x ? true : has_e ? false : (has_e = after_e = true);
+              case 45: // -
+                return after_e || (i == 0 && !prefix);
+              case 43: // +
+                return after_e;
+              case (after_e = false, 46): // .
+                return (!has_dot && !has_x && !has_e) ? (has_dot = true) : false;
+              case 110: // n
+                is_big_int = true;
+                return true;
+            }
+
+            return (
+                code >= 48 && code <= 57 // 0-9
+                || code >= 97 && code <= 102 // a-f
+                || code >= 65 && code <= 70 // A-F
+            );
+        });
+        if (prefix) num = prefix + num;
+
+        LATEST_RAW = num;
+
+        if (RE_OCT_NUMBER.test(num) && next_token.has_directive("use strict")) {
+            parse_error("Legacy octal literals are not allowed in strict mode");
+        }
+        if (numeric_separator) {
+            if (num.endsWith("_")) {
+                parse_error("Numeric separators are not allowed at the end of numeric literals");
+            } else if (num.includes("__")) {
+                parse_error("Only one underscore is allowed as numeric separator");
+            }
+            num = num.replace(/_/g, "");
+        }
+        if (is_big_int) {
+            const without_n = num.slice(0, -1);
+            const allow_e = RE_HEX_NUMBER.test(without_n);
+            const valid = parse_js_number(without_n, allow_e);
+            if (!has_dot && RE_BIG_INT.test(num) && !isNaN(valid))
+                return token("big_int", without_n);
+            parse_error("Invalid or unexpected token");
+        }
+        var valid = parse_js_number(num);
+        if (!isNaN(valid)) {
+            return token("num", valid);
+        } else {
+            parse_error("Invalid syntax: " + num);
+        }
+    }
+
+    function is_octal(ch) {
+        return ch >= "0" && ch <= "7";
+    }
+
+    function read_escaped_char(in_string, strict_hex, template_string) {
+        var ch = next(true, in_string);
+        switch (ch.charCodeAt(0)) {
+          case 110 : return "\n";
+          case 114 : return "\r";
+          case 116 : return "\t";
+          case 98  : return "\b";
+          case 118 : return "\u000b"; // \v
+          case 102 : return "\f";
+          case 120 : return String.fromCharCode(hex_bytes(2, strict_hex)); // \x
+          case 117 : // \u
+            if (peek() == "{") {
+                next(true);
+                if (peek() === "}")
+                    parse_error("Expecting hex-character between {}");
+                while (peek() == "0") next(true); // No significance
+                var result, length = find("}", true) - S.pos;
+                // Avoid 32 bit integer overflow (1 << 32 === 1)
+                // We know first character isn't 0 and thus out of range anyway
+                if (length > 6 || (result = hex_bytes(length, strict_hex)) > 0x10FFFF) {
+                    parse_error("Unicode reference out of bounds");
+                }
+                next(true);
+                return from_char_code(result);
+            }
+            return String.fromCharCode(hex_bytes(4, strict_hex));
+          case 10  : return ""; // newline
+          case 13  :            // \r
+            if (peek() == "\n") { // DOS newline
+                next(true, in_string);
+                return "";
+            }
+        }
+        if (is_octal(ch)) {
+            if (template_string && strict_hex) {
+                const represents_null_character = ch === "0" && !is_octal(peek());
+                if (!represents_null_character) {
+                    parse_error("Octal escape sequences are not allowed in template strings");
+                }
+            }
+            return read_octal_escape_sequence(ch, strict_hex);
+        }
+        return ch;
+    }
+
+    function read_octal_escape_sequence(ch, strict_octal) {
+        // Read
+        var p = peek();
+        if (p >= "0" && p <= "7") {
+            ch += next(true);
+            if (ch[0] <= "3" && (p = peek()) >= "0" && p <= "7")
+                ch += next(true);
+        }
+
+        // Parse
+        if (ch === "0") return "\0";
+        if (ch.length > 0 && next_token.has_directive("use strict") && strict_octal)
+            parse_error("Legacy octal escape sequences are not allowed in strict mode");
+        return String.fromCharCode(parseInt(ch, 8));
+    }
+
+    function hex_bytes(n, strict_hex) {
+        var num = 0;
+        for (; n > 0; --n) {
+            if (!strict_hex && isNaN(parseInt(peek(), 16))) {
+                return parseInt(num, 16) || "";
+            }
+            var digit = next(true);
+            if (isNaN(parseInt(digit, 16)))
+                parse_error("Invalid hex-character pattern in string");
+            num += digit;
+        }
+        return parseInt(num, 16);
+    }
+
+    var read_string = with_eof_error("Unterminated string constant", function() {
+        const start_pos = S.pos;
+        var quote = next(), ret = [];
+        for (;;) {
+            var ch = next(true, true);
+            if (ch == "\\") ch = read_escaped_char(true, true);
+            else if (ch == "\r" || ch == "\n") parse_error("Unterminated string constant");
+            else if (ch == quote) break;
+            ret.push(ch);
+        }
+        var tok = token("string", ret.join(""));
+        LATEST_RAW = S.text.slice(start_pos, S.pos);
+        tok.quote = quote;
+        return tok;
+    });
+
+    var read_template_characters = with_eof_error("Unterminated template", function(begin) {
+        if (begin) {
+            S.template_braces.push(S.brace_counter);
+        }
+        var content = "", raw = "", ch, tok;
+        next(true, true);
+        while ((ch = next(true, true)) != "`") {
+            if (ch == "\r") {
+                if (peek() == "\n") ++S.pos;
+                ch = "\n";
+            } else if (ch == "$" && peek() == "{") {
+                next(true, true);
+                S.brace_counter++;
+                tok = token(begin ? "template_head" : "template_cont", content);
+                TEMPLATE_RAWS.set(tok, raw);
+                tok.template_end = false;
+                return tok;
+            }
+
+            raw += ch;
+            if (ch == "\\") {
+                var tmp = S.pos;
+                var prev_is_tag = previous_token && (previous_token.type === "name" || previous_token.type === "punc" && (previous_token.value === ")" || previous_token.value === "]"));
+                ch = read_escaped_char(true, !prev_is_tag, true);
+                raw += S.text.substr(tmp, S.pos - tmp);
+            }
+
+            content += ch;
+        }
+        S.template_braces.pop();
+        tok = token(begin ? "template_head" : "template_cont", content);
+        TEMPLATE_RAWS.set(tok, raw);
+        tok.template_end = true;
+        return tok;
+    });
+
+    function skip_line_comment(type) {
+        var regex_allowed = S.regex_allowed;
+        var i = find_eol(), ret;
+        if (i == -1) {
+            ret = S.text.substr(S.pos);
+            S.pos = S.text.length;
+        } else {
+            ret = S.text.substring(S.pos, i);
+            S.pos = i;
+        }
+        S.col = S.tokcol + (S.pos - S.tokpos);
+        S.comments_before.push(token(type, ret, true));
+        S.regex_allowed = regex_allowed;
+        return next_token;
+    }
+
+    var skip_multiline_comment = with_eof_error("Unterminated multiline comment", function() {
+        var regex_allowed = S.regex_allowed;
+        var i = find("*/", true);
+        var text = S.text.substring(S.pos, i).replace(/\r\n|\r|\u2028|\u2029/g, "\n");
+        // update stream position
+        forward(get_full_char_length(text) /* text length doesn't count \r\n as 2 char while S.pos - i does */ + 2);
+        S.comments_before.push(token("comment2", text, true));
+        S.newline_before = S.newline_before || text.includes("\n");
+        S.regex_allowed = regex_allowed;
+        return next_token;
+    });
+
+    var read_name = function () {
+        let start = S.pos, end = start - 1, ch = "c";
+
+        while (
+            (ch = S.text.charAt(++end))
+            && (ch >= "a" && ch <= "z" || ch >= "A" && ch <= "Z")
+        );
+
+        // 0x7F is very rare in actual code, so we compare it to "~" (0x7E)
+        if (end > start + 1 && ch && ch !== "\\" && !is_identifier_char(ch) && ch <= "~") {
+            S.pos += end - start;
+            S.col += end - start;
+            return S.text.slice(start, S.pos);
+        }
+
+        return read_name_hard();
+    };
+
+    var read_name_hard = with_eof_error("Unterminated identifier name", function() {
+        var name = [], ch, escaped = false;
+        var read_escaped_identifier_char = function() {
+            escaped = true;
+            next();
+            if (peek() !== "u") {
+                parse_error("Expecting UnicodeEscapeSequence -- uXXXX or u{XXXX}");
+            }
+            return read_escaped_char(false, true);
+        };
+
+        // Read first character (ID_Start)
+        if ((ch = peek()) === "\\") {
+            ch = read_escaped_identifier_char();
+            if (!is_identifier_start(ch)) {
+                parse_error("First identifier char is an invalid identifier char");
+            }
+        } else if (is_identifier_start(ch)) {
+            next();
+        } else {
+            return "";
+        }
+
+        name.push(ch);
+
+        // Read ID_Continue
+        while ((ch = peek()) != null) {
+            if ((ch = peek()) === "\\") {
+                ch = read_escaped_identifier_char();
+                if (!is_identifier_char(ch)) {
+                    parse_error("Invalid escaped identifier char");
+                }
+            } else {
+                if (!is_identifier_char(ch)) {
+                    break;
+                }
+                next();
+            }
+            name.push(ch);
+        }
+        const name_str = name.join("");
+        if (RESERVED_WORDS.has(name_str) && escaped) {
+            parse_error("Escaped characters are not allowed in keywords");
+        }
+        return name_str;
+    });
+
+    var read_regexp = with_eof_error("Unterminated regular expression", function(source) {
+        var prev_backslash = false, ch, in_class = false;
+        while ((ch = next(true))) if (NEWLINE_CHARS.has(ch)) {
+            parse_error("Unexpected line terminator");
+        } else if (prev_backslash) {
+            if (/^[\u0000-\u007F]$/.test(ch)) {
+                source += "\\" + ch;
+            } else {
+                // Remove the useless slash before the escape, but only for characters that won't be added to regexp syntax
+                source += ch;
+            }
+            prev_backslash = false;
+        } else if (ch == "[") {
+            in_class = true;
+            source += ch;
+        } else if (ch == "]" && in_class) {
+            in_class = false;
+            source += ch;
+        } else if (ch == "/" && !in_class) {
+            break;
+        } else if (ch == "\\") {
+            prev_backslash = true;
+        } else {
+            source += ch;
+        }
+        const flags = read_name();
+        return token("regexp", "/" + source + "/" + flags);
+    });
+
+    function read_operator(prefix) {
+        function grow(op) {
+            if (!peek()) return op;
+            var bigger = op + peek();
+            if (OPERATORS.has(bigger)) {
+                next();
+                return grow(bigger);
+            } else {
+                return op;
+            }
+        }
+        return token("operator", grow(prefix || next()));
+    }
+
+    function handle_slash() {
+        next();
+        switch (peek()) {
+          case "/":
+            next();
+            return skip_line_comment("comment1");
+          case "*":
+            next();
+            return skip_multiline_comment();
+        }
+        return S.regex_allowed ? read_regexp("") : read_operator("/");
+    }
+
+    function handle_eq_sign() {
+        next();
+        if (peek() === ">") {
+            next();
+            return token("arrow", "=>");
+        } else {
+            return read_operator("=");
+        }
+    }
+
+    function handle_dot() {
+        next();
+        if (is_digit(peek().charCodeAt(0))) {
+            return read_num(".");
+        }
+        if (peek() === ".") {
+            next();  // Consume second dot
+            next();  // Consume third dot
+            return token("expand", "...");
+        }
+
+        return token("punc", ".");
+    }
+
+    function read_word() {
+        var word = read_name();
+        if (prev_was_dot) return token("name", word);
+        return KEYWORDS_ATOM.has(word) ? token("atom", word)
+            : !KEYWORDS.has(word) ? token("name", word)
+            : OPERATORS.has(word) ? token("operator", word)
+            : token("keyword", word);
+    }
+
+    function read_private_word() {
+        next();
+        return token("privatename", read_name());
+    }
+
+    function with_eof_error(eof_error, cont) {
+        return function(x) {
+            try {
+                return cont(x);
+            } catch(ex) {
+                if (ex === EX_EOF) parse_error(eof_error);
+                else throw ex;
+            }
+        };
+    }
+
+    function next_token(force_regexp) {
+        if (force_regexp != null)
+            return read_regexp(force_regexp);
+        if (shebang && S.pos == 0 && looking_at("#!")) {
+            start_token();
+            forward(2);
+            skip_line_comment("comment5");
+        }
+        for (;;) {
+            skip_whitespace();
+            start_token();
+            if (html5_comments) {
+                if (looking_at("<!--")) {
+                    forward(4);
+                    skip_line_comment("comment3");
+                    continue;
+                }
+                if (looking_at("-->") && S.newline_before) {
+                    forward(3);
+                    skip_line_comment("comment4");
+                    continue;
+                }
+            }
+            var ch = peek();
+            if (!ch) return token("eof");
+            var code = ch.charCodeAt(0);
+            switch (code) {
+              case 34: case 39: return read_string();
+              case 46: return handle_dot();
+              case 47: {
+                  var tok = handle_slash();
+                  if (tok === next_token) continue;
+                  return tok;
+              }
+              case 61: return handle_eq_sign();
+              case 63: {
+                  if (!is_option_chain_op()) break;  // Handled below
+
+                  next(); // ?
+                  next(); // .
+
+                  return token("punc", "?.");
+              }
+              case 96: return read_template_characters(true);
+              case 123:
+                S.brace_counter++;
+                break;
+              case 125:
+                S.brace_counter--;
+                if (S.template_braces.length > 0
+                    && S.template_braces[S.template_braces.length - 1] === S.brace_counter)
+                    return read_template_characters(false);
+                break;
+            }
+            if (is_digit(code)) return read_num();
+            if (PUNC_CHARS.has(ch)) return token("punc", next());
+            if (OPERATOR_CHARS.has(ch)) return read_operator();
+            if (code == 92 || is_identifier_start(ch)) return read_word();
+            if (code == 35) return read_private_word();
+            break;
+        }
+        parse_error("Unexpected character '" + ch + "'");
+    }
+
+    next_token.next = next;
+    next_token.peek = peek;
+
+    next_token.context = function(nc) {
+        if (nc) S = nc;
+        return S;
+    };
+
+    next_token.add_directive = function(directive) {
+        S.directive_stack[S.directive_stack.length - 1].push(directive);
+
+        if (S.directives[directive] === undefined) {
+            S.directives[directive] = 1;
+        } else {
+            S.directives[directive]++;
+        }
+    };
+
+    next_token.push_directives_stack = function() {
+        S.directive_stack.push([]);
+    };
+
+    next_token.pop_directives_stack = function() {
+        var directives = S.directive_stack[S.directive_stack.length - 1];
+
+        for (var i = 0; i < directives.length; i++) {
+            S.directives[directives[i]]--;
+        }
+
+        S.directive_stack.pop();
+    };
+
+    next_token.has_directive = function(directive) {
+        return S.directives[directive] > 0;
+    };
+
+    next_token.peek_next_token_start_or_newline = peek_next_token_start_or_newline;
+    next_token.ch_starts_binding_identifier = ch_starts_binding_identifier;
+
+    return next_token;
+
+}
+
+/* -----[ Parser (constants) ]----- */
+
+var UNARY_PREFIX = makePredicate([
+    "typeof",
+    "void",
+    "delete",
+    "--",
+    "++",
+    "!",
+    "~",
+    "-",
+    "+"
+]);
+
+var UNARY_POSTFIX = makePredicate([ "--", "++" ]);
+
+var ASSIGNMENT = makePredicate([ "=", "+=", "-=", "??=", "&&=", "||=", "/=", "*=", "**=", "%=", ">>=", "<<=", ">>>=", "|=", "^=", "&=" ]);
+
+var LOGICAL_ASSIGNMENT = makePredicate([ "??=", "&&=", "||=" ]);
+
+var PRECEDENCE = (function(a, ret) {
+    for (var i = 0; i < a.length; ++i) {
+        for (const op of a[i]) {
+            ret[op] = i + 1;
+        }
+    }
+    return ret;
+})(
+    [
+        ["||"],
+        ["??"],
+        ["&&"],
+        ["|"],
+        ["^"],
+        ["&"],
+        ["==", "===", "!=", "!=="],
+        ["<", ">", "<=", ">=", "in", "instanceof"],
+        [">>", "<<", ">>>"],
+        ["+", "-"],
+        ["*", "/", "%"],
+        ["**"]
+    ],
+    {}
+);
+
+var ATOMIC_START_TOKEN = makePredicate([ "atom", "num", "big_int", "string", "regexp", "name"]);
+
+/* -----[ Parser ]----- */
+
+function parse($TEXT, options) {
+    // maps start tokens to count of comments found outside of their parens
+    // Example: /* I count */ ( /* I don't */ foo() )
+    // Useful because comments_before property of call with parens outside
+    // contains both comments inside and outside these parens. Used to find the
+    // right #__PURE__ comments for an expression
+    const outer_comments_before_counts = new WeakMap();
+
+    options = defaults(options, {
+        bare_returns   : false,
+        ecma           : null,  // Legacy
+        expression     : false,
+        filename       : null,
+        html5_comments : true,
+        module         : false,
+        shebang        : true,
+        strict         : false,
+        toplevel       : null,
+    }, true);
+
+    var S = {
+        input         : (typeof $TEXT == "string"
+                         ? tokenizer($TEXT, options.filename,
+                                     options.html5_comments, options.shebang)
+                         : $TEXT),
+        token         : null,
+        prev          : null,
+        peeked        : null,
+        in_function   : 0,
+        in_async      : -1,
+        in_generator  : -1,
+        in_directives : true,
+        in_loop       : 0,
+        labels        : []
+    };
+
+    S.token = next();
+
+    function is(type, value) {
+        return is_token(S.token, type, value);
+    }
+
+    function peek() { return S.peeked || (S.peeked = S.input()); }
+
+    function next() {
+        S.prev = S.token;
+
+        if (!S.peeked) peek();
+        S.token = S.peeked;
+        S.peeked = null;
+        S.in_directives = S.in_directives && (
+            S.token.type == "string" || is("punc", ";")
+        );
+        return S.token;
+    }
+
+    function prev() {
+        return S.prev;
+    }
+
+    function croak(msg, line, col, pos) {
+        var ctx = S.input.context();
+        js_error(msg,
+                 ctx.filename,
+                 line != null ? line : ctx.tokline,
+                 col != null ? col : ctx.tokcol,
+                 pos != null ? pos : ctx.tokpos);
+    }
+
+    function token_error(token, msg) {
+        croak(msg, token.line, token.col);
+    }
+
+    function unexpected(token) {
+        if (token == null)
+            token = S.token;
+        token_error(token, "Unexpected token: " + token.type + " (" + token.value + ")");
+    }
+
+    function expect_token(type, val) {
+        if (is(type, val)) {
+            return next();
+        }
+        token_error(S.token, "Unexpected token " + S.token.type + " «" + S.token.value + "»" + ", expected " + type + " «" + val + "»");
+    }
+
+    function expect(punc) { return expect_token("punc", punc); }
+
+    function has_newline_before(token) {
+        return token.nlb || !token.comments_before.every((comment) => !comment.nlb);
+    }
+
+    function can_insert_semicolon() {
+        return !options.strict
+            && (is("eof") || is("punc", "}") || has_newline_before(S.token));
+    }
+
+    function is_in_generator() {
+        return S.in_generator === S.in_function;
+    }
+
+    function is_in_async() {
+        return S.in_async === S.in_function;
+    }
+
+    function can_await() {
+        return (
+            S.in_async === S.in_function
+            || S.in_function === 0 && S.input.has_directive("use strict")
+        );
+    }
+
+    function semicolon(optional) {
+        if (is("punc", ";")) next();
+        else if (!optional && !can_insert_semicolon()) unexpected();
+    }
+
+    function parenthesised() {
+        expect("(");
+        var exp = expression(true);
+        expect(")");
+        return exp;
+    }
+
+    function embed_tokens(parser) {
+        return function _embed_tokens_wrapper(...args) {
+            const start = S.token;
+            const expr = parser(...args);
+            expr.start = start;
+            expr.end = prev();
+            return expr;
+        };
+    }
+
+    function handle_regexp() {
+        if (is("operator", "/") || is("operator", "/=")) {
+            S.peeked = null;
+            S.token = S.input(S.token.value.substr(1)); // force regexp
+        }
+    }
+
+    var statement = embed_tokens(function statement(is_export_default, is_for_body, is_if_body) {
+        handle_regexp();
+        switch (S.token.type) {
+          case "string":
+            if (S.in_directives) {
+                var token = peek();
+                if (!LATEST_RAW.includes("\\")
+                    && (is_token(token, "punc", ";")
+                        || is_token(token, "punc", "}")
+                        || has_newline_before(token)
+                        || is_token(token, "eof"))) {
+                    S.input.add_directive(S.token.value);
+                } else {
+                    S.in_directives = false;
+                }
+            }
+            var dir = S.in_directives, stat = simple_statement();
+            return dir && stat.body instanceof AST_String ? new AST_Directive(stat.body) : stat;
+          case "template_head":
+          case "num":
+          case "big_int":
+          case "regexp":
+          case "operator":
+          case "atom":
+            return simple_statement();
+
+          case "name":
+            if (S.token.value == "async" && is_token(peek(), "keyword", "function")) {
+                next();
+                next();
+                if (is_for_body) {
+                    croak("functions are not allowed as the body of a loop");
+                }
+                return function_(AST_Defun, false, true, is_export_default);
+            }
+            if (S.token.value == "import" && !is_token(peek(), "punc", "(") && !is_token(peek(), "punc", ".")) {
+                next();
+                var node = import_statement();
+                semicolon();
+                return node;
+            }
+            if (S.token.value == "using" && is_token(peek(), "name") && !has_newline_before(peek())) {
+                next();
+                var node = using_();
+                semicolon();
+                return node;
+            }
+            if (S.token.value == "await" && can_await() && is_token(peek(), "name", "using") && !has_newline_before(peek())) {
+                var next_next = S.input.peek_next_token_start_or_newline();
+                if (S.input.ch_starts_binding_identifier(next_next.char, next_next.pos)) {
+                    next();
+                    // The "using" token will be consumed by the await_using_ function.
+                    var node = await_using_();
+                    semicolon();
+                    return node;
+                }
+            }
+            return is_token(peek(), "punc", ":")
+                ? labeled_statement()
+                : simple_statement();
+
+          case "privatename":
+            if(!S.in_class)
+              croak("Private field must be used in an enclosing class");
+            return simple_statement();
+
+          case "punc":
+            switch (S.token.value) {
+              case "{":
+                return new AST_BlockStatement({
+                    start : S.token,
+                    body  : block_(),
+                    end   : prev()
+                });
+              case "[":
+              case "(":
+                return simple_statement();
+              case ";":
+                S.in_directives = false;
+                next();
+                return new AST_EmptyStatement();
+              default:
+                unexpected();
+            }
+
+          case "keyword":
+            switch (S.token.value) {
+              case "break":
+                next();
+                return break_cont(AST_Break);
+
+              case "continue":
+                next();
+                return break_cont(AST_Continue);
+
+              case "debugger":
+                next();
+                semicolon();
+                return new AST_Debugger();
+
+              case "do":
+                next();
+                var body = in_loop(statement);
+                expect_token("keyword", "while");
+                var condition = parenthesised();
+                semicolon(true);
+                return new AST_Do({
+                    body      : body,
+                    condition : condition
+                });
+
+              case "while":
+                next();
+                return new AST_While({
+                    condition : parenthesised(),
+                    body      : in_loop(function() { return statement(false, true); })
+                });
+
+              case "for":
+                next();
+                return for_();
+
+              case "class":
+                next();
+                if (is_for_body) {
+                    croak("classes are not allowed as the body of a loop");
+                }
+                if (is_if_body) {
+                    croak("classes are not allowed as the body of an if");
+                }
+                return class_(AST_DefClass, is_export_default);
+
+              case "function":
+                next();
+                if (is_for_body) {
+                    croak("functions are not allowed as the body of a loop");
+                }
+                return function_(AST_Defun, false, false, is_export_default);
+
+              case "if":
+                next();
+                return if_();
+
+              case "return":
+                if (S.in_function == 0 && !options.bare_returns)
+                    croak("'return' outside of function");
+                next();
+                var value = null;
+                if (is("punc", ";")) {
+                    next();
+                } else if (!can_insert_semicolon()) {
+                    value = expression(true);
+                    semicolon();
+                }
+                return new AST_Return({
+                    value: value
+                });
+
+              case "switch":
+                next();
+                return new AST_Switch({
+                    expression : parenthesised(),
+                    body       : in_loop(switch_body_)
+                });
+
+              case "throw":
+                next();
+                if (has_newline_before(S.token))
+                    croak("Illegal newline after 'throw'");
+                var value = expression(true);
+                semicolon();
+                return new AST_Throw({
+                    value: value
+                });
+
+              case "try":
+                next();
+                return try_();
+
+              case "var":
+                next();
+                var node = var_();
+                semicolon();
+                return node;
+
+              case "let":
+                next();
+                var node = let_();
+                semicolon();
+                return node;
+
+              case "const":
+                next();
+                var node = const_();
+                semicolon();
+                return node;
+
+              case "with":
+                if (S.input.has_directive("use strict")) {
+                    croak("Strict mode may not include a with statement");
+                }
+                next();
+                return new AST_With({
+                    expression : parenthesised(),
+                    body       : statement()
+                });
+
+              case "export":
+                if (!is_token(peek(), "punc", "(")) {
+                    next();
+                    var node = export_statement();
+                    if (is("punc", ";")) semicolon();
+                    return node;
+                }
+            }
+        }
+        unexpected();
+    });
+
+    function labeled_statement() {
+        var label = as_symbol(AST_Label);
+        if (label.name === "await" && is_in_async()) {
+            token_error(S.prev, "await cannot be used as label inside async function");
+        }
+        if (S.labels.some((l) => l.name === label.name)) {
+            // ECMA-262, 12.12: An ECMAScript program is considered
+            // syntactically incorrect if it contains a
+            // LabelledStatement that is enclosed by a
+            // LabelledStatement with the same Identifier as label.
+            croak("Label " + label.name + " defined twice");
+        }
+        expect(":");
+        S.labels.push(label);
+        var stat = statement();
+        S.labels.pop();
+        if (!(stat instanceof AST_IterationStatement)) {
+            // check for `continue` that refers to this label.
+            // those should be reported as syntax errors.
+            // https://github.com/mishoo/UglifyJS2/issues/287
+            label.references.forEach(function(ref) {
+                if (ref instanceof AST_Continue) {
+                    ref = ref.label.start;
+                    croak("Continue label `" + label.name + "` refers to non-IterationStatement.",
+                          ref.line, ref.col, ref.pos);
+                }
+            });
+        }
+        return new AST_LabeledStatement({ body: stat, label: label });
+    }
+
+    function simple_statement(tmp) {
+        return new AST_SimpleStatement({ body: (tmp = expression(true), semicolon(), tmp) });
+    }
+
+    function break_cont(type) {
+        var label = null, ldef;
+        if (!can_insert_semicolon()) {
+            label = as_symbol(AST_LabelRef, true);
+        }
+        if (label != null) {
+            ldef = S.labels.find((l) => l.name === label.name);
+            if (!ldef)
+                croak("Undefined label " + label.name);
+            label.thedef = ldef;
+        } else if (S.in_loop == 0)
+            croak(type.TYPE + " not inside a loop or switch");
+        semicolon();
+        var stat = new type({ label: label });
+        if (ldef) ldef.references.push(stat);
+        return stat;
+    }
+
+    function for_() {
+        var for_await_error = "`for await` invalid in this context";
+        var await_tok = S.token;
+        if (await_tok.type == "name" && await_tok.value == "await") {
+            if (!can_await()) {
+                token_error(await_tok, for_await_error);
+            }
+            next();
+        } else {
+            await_tok = false;
+        }
+        expect("(");
+        var init = null;
+        if (!is("punc", ";")) {
+            init =
+                is("keyword", "var") ? (next(), var_(true)) :
+                is("keyword", "let") ? (next(), let_(true)) :
+                is("keyword", "const") ? (next(), const_(true)) :
+                is("name", "using") && is_token(peek(), "name") && (peek().value != "of" || S.input.peek_next_token_start_or_newline().char == "=") ? (next(), using_(true)) :
+                is("name", "await") && can_await() && is_token(peek(), "name", "using") ? (next(), await_using_(true)) :
+                                       expression(true, true);
+            var is_in = is("operator", "in");
+            var is_of = is("name", "of");
+            if (await_tok && !is_of) {
+                token_error(await_tok, for_await_error);
+            }
+            if (is_in || is_of) {
+                if (init instanceof AST_DefinitionsLike) {
+                    if (init.definitions.length > 1)
+                        token_error(init.start, "Only one variable declaration allowed in for..in loop");
+                    if (is_in && init instanceof AST_Using) {
+                        token_error(init.start, "Invalid using declaration in for..in loop");
+                    }
+                } else if (!(is_assignable(init) || (init = to_destructuring(init)) instanceof AST_Destructuring)) {
+                    token_error(init.start, "Invalid left-hand side in for..in loop");
+                }
+                next();
+                if (is_in) {
+                    return for_in(init);
+                } else {
+                    return for_of(init, !!await_tok);
+                }
+            }
+        } else if (await_tok) {
+            token_error(await_tok, for_await_error);
+        }
+        return regular_for(init);
+    }
+
+    function regular_for(init) {
+        expect(";");
+        var test = is("punc", ";") ? null : expression(true);
+        expect(";");
+        var step = is("punc", ")") ? null : expression(true);
+        expect(")");
+        return new AST_For({
+            init      : init,
+            condition : test,
+            step      : step,
+            body      : in_loop(function() { return statement(false, true); })
+        });
+    }
+
+    function for_of(init, is_await) {
+        var lhs = init instanceof AST_DefinitionsLike ? init.definitions[0].name : null;
+        var obj = expression(true);
+        expect(")");
+        return new AST_ForOf({
+            await  : is_await,
+            init   : init,
+            name   : lhs,
+            object : obj,
+            body   : in_loop(function() { return statement(false, true); })
+        });
+    }
+
+    function for_in(init) {
+        var obj = expression(true);
+        expect(")");
+        return new AST_ForIn({
+            init   : init,
+            object : obj,
+            body   : in_loop(function() { return statement(false, true); })
+        });
+    }
+
+    var arrow_function = function(start, argnames, is_async) {
+        if (has_newline_before(S.token)) {
+            croak("Unexpected newline before arrow (=>)");
+        }
+
+        expect_token("arrow", "=>");
+
+        var body = _function_body(is("punc", "{"), false, is_async);
+
+        return new AST_Arrow({
+            start    : start,
+            end      : body.end,
+            async    : is_async,
+            argnames : argnames,
+            body     : body
+        });
+    };
+
+    var function_ = function(ctor, is_generator, is_async, is_export_default) {
+        var in_statement = ctor === AST_Defun;
+        if (is("operator", "*")) {
+            is_generator = true;
+            next();
+        }
+
+        var name = is("name") ? as_symbol(in_statement ? AST_SymbolDefun : AST_SymbolLambda) : null;
+        if (in_statement && !name) {
+            if (is_export_default) {
+                ctor = AST_Function;
+            } else {
+                unexpected();
+            }
+        }
+
+        if (name && ctor !== AST_Accessor && !(name instanceof AST_SymbolDeclaration))
+            unexpected(prev());
+
+        var args = [];
+        var body = _function_body(true, is_generator, is_async, name, args);
+        return new ctor({
+            start : args.start,
+            end   : body.end,
+            is_generator: is_generator,
+            async : is_async,
+            name  : name,
+            argnames: args,
+            body  : body
+        });
+    };
+
+    class UsedParametersTracker {
+        constructor(is_parameter, strict, duplicates_ok = false) {
+            this.is_parameter = is_parameter;
+            this.duplicates_ok = duplicates_ok;
+            this.parameters = new Set();
+            this.duplicate = null;
+            this.default_assignment = false;
+            this.spread = false;
+            this.strict_mode = !!strict;
+        }
+        add_parameter(token) {
+            if (this.parameters.has(token.value)) {
+                if (this.duplicate === null) {
+                    this.duplicate = token;
+                }
+                this.check_strict();
+            } else {
+                this.parameters.add(token.value);
+                if (this.is_parameter) {
+                    switch (token.value) {
+                      case "arguments":
+                      case "eval":
+                      case "yield":
+                        if (this.strict_mode) {
+                            token_error(token, "Unexpected " + token.value + " identifier as parameter inside strict mode");
+                        }
+                        break;
+                      default:
+                        if (RESERVED_WORDS.has(token.value)) {
+                            unexpected();
+                        }
+                    }
+                }
+            }
+        }
+        mark_default_assignment(token) {
+            if (this.default_assignment === false) {
+                this.default_assignment = token;
+            }
+        }
+        mark_spread(token) {
+            if (this.spread === false) {
+                this.spread = token;
+            }
+        }
+        mark_strict_mode() {
+            this.strict_mode = true;
+        }
+        is_strict() {
+            return this.default_assignment !== false || this.spread !== false || this.strict_mode;
+        }
+        check_strict() {
+            if (this.is_strict() && this.duplicate !== null && !this.duplicates_ok) {
+                token_error(this.duplicate, "Parameter " + this.duplicate.value + " was used already");
+            }
+        }
+    }
+
+    function parameters(params) {
+        var used_parameters = new UsedParametersTracker(true, S.input.has_directive("use strict"));
+
+        expect("(");
+
+        while (!is("punc", ")")) {
+            var param = parameter(used_parameters);
+            params.push(param);
+
+            if (!is("punc", ")")) {
+                expect(",");
+            }
+
+            if (param instanceof AST_Expansion) {
+                break;
+            }
+        }
+
+        next();
+    }
+
+    function parameter(used_parameters, symbol_type) {
+        var param;
+        var expand = false;
+        if (used_parameters === undefined) {
+            used_parameters = new UsedParametersTracker(true, S.input.has_directive("use strict"));
+        }
+        if (is("expand", "...")) {
+            expand = S.token;
+            used_parameters.mark_spread(S.token);
+            next();
+        }
+        param = binding_element(used_parameters, symbol_type);
+
+        if (is("operator", "=") && expand === false) {
+            used_parameters.mark_default_assignment(S.token);
+            next();
+            param = new AST_DefaultAssign({
+                start: param.start,
+                left: param,
+                operator: "=",
+                right: expression(false),
+                end: S.token
+            });
+        }
+
+        if (expand !== false) {
+            if (!is("punc", ")")) {
+                unexpected();
+            }
+            param = new AST_Expansion({
+                start: expand,
+                expression: param,
+                end: expand
+            });
+        }
+        used_parameters.check_strict();
+
+        return param;
+    }
+
+    function binding_element(used_parameters, symbol_type) {
+        var elements = [];
+        var first = true;
+        var is_expand = false;
+        var expand_token;
+        var first_token = S.token;
+        if (used_parameters === undefined) {
+            const strict = S.input.has_directive("use strict");
+            const duplicates_ok = symbol_type === AST_SymbolVar;
+            used_parameters = new UsedParametersTracker(false, strict, duplicates_ok);
+        }
+        symbol_type = symbol_type === undefined ? AST_SymbolFunarg : symbol_type;
+        if (is("punc", "[")) {
+            next();
+            while (!is("punc", "]")) {
+                if (first) {
+                    first = false;
+                } else {
+                    expect(",");
+                }
+
+                if (is("expand", "...")) {
+                    is_expand = true;
+                    expand_token = S.token;
+                    used_parameters.mark_spread(S.token);
+                    next();
+                }
+                if (is("punc")) {
+                    switch (S.token.value) {
+                      case ",":
+                        elements.push(new AST_Hole({
+                            start: S.token,
+                            end: S.token
+                        }));
+                        continue;
+                      case "]": // Trailing comma after last element
+                        break;
+                      case "[":
+                      case "{":
+                        elements.push(binding_element(used_parameters, symbol_type));
+                        break;
+                      default:
+                        unexpected();
+                    }
+                } else if (is("name")) {
+                    used_parameters.add_parameter(S.token);
+                    elements.push(as_symbol(symbol_type));
+                } else {
+                    croak("Invalid function parameter");
+                }
+                if (is("operator", "=") && is_expand === false) {
+                    used_parameters.mark_default_assignment(S.token);
+                    next();
+                    elements[elements.length - 1] = new AST_DefaultAssign({
+                        start: elements[elements.length - 1].start,
+                        left: elements[elements.length - 1],
+                        operator: "=",
+                        right: expression(false),
+                        end: S.token
+                    });
+                }
+                if (is_expand) {
+                    if (!is("punc", "]")) {
+                        croak("Rest element must be last element");
+                    }
+                    elements[elements.length - 1] = new AST_Expansion({
+                        start: expand_token,
+                        expression: elements[elements.length - 1],
+                        end: expand_token
+                    });
+                }
+            }
+            expect("]");
+            used_parameters.check_strict();
+            return new AST_Destructuring({
+                start: first_token,
+                names: elements,
+                is_array: true,
+                end: prev()
+            });
+        } else if (is("punc", "{")) {
+            next();
+            while (!is("punc", "}")) {
+                if (first) {
+                    first = false;
+                } else {
+                    expect(",");
+                }
+                if (is("expand", "...")) {
+                    is_expand = true;
+                    expand_token = S.token;
+                    used_parameters.mark_spread(S.token);
+                    next();
+                }
+                if (is("name") && (is_token(peek(), "punc") || is_token(peek(), "operator")) && [",", "}", "="].includes(peek().value)) {
+                    used_parameters.add_parameter(S.token);
+                    var start = prev();
+                    var value = as_symbol(symbol_type);
+                    if (is_expand) {
+                        elements.push(new AST_Expansion({
+                            start: expand_token,
+                            expression: value,
+                            end: value.end,
+                        }));
+                    } else {
+                        elements.push(new AST_ObjectKeyVal({
+                            start: start,
+                            key: value.name,
+                            value: value,
+                            end: value.end,
+                        }));
+                    }
+                } else if (is("punc", "}")) {
+                    continue; // Allow trailing hole
+                } else {
+                    var property_token = S.token;
+                    var property = as_property_name();
+                    if (property === null) {
+                        unexpected(prev());
+                    } else if (prev().type === "name" && !is("punc", ":")) {
+                        elements.push(new AST_ObjectKeyVal({
+                            start: prev(),
+                            key: property,
+                            value: new symbol_type({
+                                start: prev(),
+                                name: property,
+                                end: prev()
+                            }),
+                            end: prev()
+                        }));
+                    } else {
+                        expect(":");
+                        elements.push(new AST_ObjectKeyVal({
+                            start: property_token,
+                            quote: property_token.quote,
+                            key: property,
+                            value: binding_element(used_parameters, symbol_type),
+                            end: prev()
+                        }));
+                    }
+                }
+                if (is_expand) {
+                    if (!is("punc", "}")) {
+                        croak("Rest element must be last element");
+                    }
+                } else if (is("operator", "=")) {
+                    used_parameters.mark_default_assignment(S.token);
+                    next();
+                    elements[elements.length - 1].value = new AST_DefaultAssign({
+                        start: elements[elements.length - 1].value.start,
+                        left: elements[elements.length - 1].value,
+                        operator: "=",
+                        right: expression(false),
+                        end: S.token
+                    });
+                }
+            }
+            expect("}");
+            used_parameters.check_strict();
+            return new AST_Destructuring({
+                start: first_token,
+                names: elements,
+                is_array: false,
+                end: prev()
+            });
+        } else if (is("name")) {
+            used_parameters.add_parameter(S.token);
+            return as_symbol(symbol_type);
+        } else {
+            croak("Invalid function parameter");
+        }
+    }
+
+    function params_or_seq_(allow_arrows, maybe_sequence) {
+        var spread_token;
+        var invalid_sequence;
+        var trailing_comma;
+        var a = [];
+        expect("(");
+        while (!is("punc", ")")) {
+            if (spread_token) unexpected(spread_token);
+            if (is("expand", "...")) {
+                spread_token = S.token;
+                if (maybe_sequence) invalid_sequence = S.token;
+                next();
+                a.push(new AST_Expansion({
+                    start: prev(),
+                    expression: expression(),
+                    end: S.token,
+                }));
+            } else {
+                a.push(expression());
+            }
+            if (!is("punc", ")")) {
+                expect(",");
+                if (is("punc", ")")) {
+                    trailing_comma = prev();
+                    if (maybe_sequence) invalid_sequence = trailing_comma;
+                }
+            }
+        }
+        expect(")");
+        if (allow_arrows && is("arrow", "=>")) {
+            if (spread_token && trailing_comma) unexpected(trailing_comma);
+        } else if (invalid_sequence) {
+            unexpected(invalid_sequence);
+        }
+        return a;
+    }
+
+    function _function_body(block, generator, is_async, name, args) {
+        var loop = S.in_loop;
+        var labels = S.labels;
+        var current_generator = S.in_generator;
+        var current_async = S.in_async;
+        ++S.in_function;
+        if (generator)
+            S.in_generator = S.in_function;
+        if (is_async)
+            S.in_async = S.in_function;
+        if (args) parameters(args);
+        if (block)
+            S.in_directives = true;
+        S.in_loop = 0;
+        S.labels = [];
+        if (block) {
+            S.input.push_directives_stack();
+            var a = block_();
+            if (name) _verify_symbol(name);
+            if (args) args.forEach(_verify_symbol);
+            S.input.pop_directives_stack();
+        } else {
+            var a = [new AST_Return({
+                start: S.token,
+                value: expression(false),
+                end: S.token
+            })];
+        }
+        --S.in_function;
+        S.in_loop = loop;
+        S.labels = labels;
+        S.in_generator = current_generator;
+        S.in_async = current_async;
+        return a;
+    }
+
+    function _await_expression() {
+        // Previous token must be "await" and not be interpreted as an identifier
+        if (!can_await()) {
+            croak("Unexpected await expression outside async function",
+                S.prev.line, S.prev.col, S.prev.pos);
+        }
+        // the await expression is parsed as a unary expression in Babel
+        return new AST_Await({
+            start: prev(),
+            end: S.token,
+            expression : maybe_unary(true),
+        });
+    }
+
+    function _yield_expression() {
+        var start = S.token;
+        var star = false;
+        var has_expression = true;
+
+        // Attempt to get expression or star (and then the mandatory expression)
+        // behind yield on the same line.
+        //
+        // If nothing follows on the same line of the yieldExpression,
+        // it should default to the value `undefined` for yield to return.
+        // In that case, the `undefined` stored as `null` in ast.
+        //
+        // Note 1: It isn't allowed for yield* to close without an expression
+        // Note 2: If there is a nlb between yield and star, it is interpret as
+        //         yield <explicit undefined> <inserted automatic semicolon> *
+        if (
+            can_insert_semicolon()
+            || is("punc") && PUNC_AFTER_EXPRESSION.has(S.token.value)
+            || is("template_cont")
+        ) {
+            has_expression = false;
+        } else if (is("operator", "*")) {
+            star = true;
+            next();
+        }
+
+        return new AST_Yield({
+            start      : start,
+            is_star    : star,
+            expression : has_expression ? expression() : null,
+            end        : prev()
+        });
+    }
+
+    function if_() {
+        var cond = parenthesised(), body = statement(false, false, true), belse = null;
+        if (is("keyword", "else")) {
+            next();
+            belse = statement(false, false, true);
+        }
+        return new AST_If({
+            condition   : cond,
+            body        : body,
+            alternative : belse
+        });
+    }
+
+    function block_() {
+        expect("{");
+        var a = [];
+        while (!is("punc", "}")) {
+            if (is("eof")) unexpected();
+            a.push(statement());
+        }
+        next();
+        return a;
+    }
+
+    function switch_body_() {
+        expect("{");
+        var a = [], cur = null, branch = null, tmp;
+        while (!is("punc", "}")) {
+            if (is("eof")) unexpected();
+            if (is("keyword", "case")) {
+                if (branch) branch.end = prev();
+                cur = [];
+                branch = new AST_Case({
+                    start      : (tmp = S.token, next(), tmp),
+                    expression : expression(true),
+                    body       : cur
+                });
+                a.push(branch);
+                expect(":");
+            } else if (is("keyword", "default")) {
+                if (branch) branch.end = prev();
+                cur = [];
+                branch = new AST_Default({
+                    start : (tmp = S.token, next(), expect(":"), tmp),
+                    body  : cur
+                });
+                a.push(branch);
+            } else {
+                if (!cur) unexpected();
+                cur.push(statement());
+            }
+        }
+        if (branch) branch.end = prev();
+        next();
+        return a;
+    }
+
+    function try_() {
+        var body, bcatch = null, bfinally = null;
+        body = new AST_TryBlock({
+            start : S.token,
+            body  : block_(),
+            end   : prev(),
+        });
+        if (is("keyword", "catch")) {
+            var start = S.token;
+            next();
+            if (is("punc", "{")) {
+                var name = null;
+            } else {
+                expect("(");
+                var name = parameter(undefined, AST_SymbolCatch);
+                expect(")");
+            }
+            bcatch = new AST_Catch({
+                start   : start,
+                argname : name,
+                body    : block_(),
+                end     : prev()
+            });
+        }
+        if (is("keyword", "finally")) {
+            var start = S.token;
+            next();
+            bfinally = new AST_Finally({
+                start : start,
+                body  : block_(),
+                end   : prev()
+            });
+        }
+        if (!bcatch && !bfinally)
+            croak("Missing catch/finally blocks");
+        return new AST_Try({
+            body     : body,
+            bcatch   : bcatch,
+            bfinally : bfinally
+        });
+    }
+
+    /**
+     * var
+     *   vardef1 = 2,
+     *   vardef2 = 3;
+     */
+    function vardefs(no_in, kind) {
+        var var_defs = [];
+        var def;
+        for (;;) {
+            var sym_type =
+                kind === "var" ? AST_SymbolVar :
+                kind === "const" ? AST_SymbolConst :
+                kind === "let" ? AST_SymbolLet :
+                kind === "using" ? AST_SymbolUsing :
+                kind === "await using" ? AST_SymbolUsing : null;
+            var def_type = kind === "using" || kind === "await using" ? AST_UsingDef : AST_VarDef;
+            // var { a } = b
+            if (is("punc", "{") || is("punc", "[")) {
+                def = new def_type({
+                    start: S.token,
+                    name: binding_element(undefined, sym_type),
+                    value: is("operator", "=") ? (expect_token("operator", "="), expression(false, no_in)) : null,
+                    end: prev()
+                });
+            } else {
+                def = new def_type({
+                    start : S.token,
+                    name  : as_symbol(sym_type),
+                    value : is("operator", "=")
+                        ? (next(), expression(false, no_in))
+                        : !no_in && (kind === "const" || kind === "using" || kind === "await using")
+                            ? croak("Missing initializer in " + kind + " declaration") : null,
+                    end   : prev()
+                });
+                if (def.name.name == "import") croak("Unexpected token: import");
+            }
+            var_defs.push(def);
+            if (!is("punc", ","))
+                break;
+            next();
+        }
+        return var_defs;
+    }
+
+    var var_ = function(no_in) {
+        return new AST_Var({
+            start       : prev(),
+            definitions : vardefs(no_in, "var"),
+            end         : prev()
+        });
+    };
+
+    var let_ = function(no_in) {
+        return new AST_Let({
+            start       : prev(),
+            definitions : vardefs(no_in, "let"),
+            end         : prev()
+        });
+    };
+
+    var const_ = function(no_in) {
+        return new AST_Const({
+            start       : prev(),
+            definitions : vardefs(no_in, "const"),
+            end         : prev()
+        });
+    };
+
+    var using_ = function(no_in) {
+        return new AST_Using({
+            start       : prev(),
+            await       : false,
+            definitions : vardefs(no_in, "using"),
+            end         : prev()
+        });
+    };
+
+    var await_using_ = function(no_in) {
+        // Assumption: When await_using_ is called, only the `await` token has been consumed.
+        return new AST_Using({
+            start       : prev(),
+            await       : true,
+            definitions : (next(), vardefs(no_in, "await using")),
+            end         : prev()
+        });
+    };
+
+    var new_ = function(allow_calls) {
+        var start = S.token;
+        expect_token("operator", "new");
+        if (is("punc", ".")) {
+            next();
+            expect_token("name", "target");
+            return subscripts(new AST_NewTarget({
+                start : start,
+                end   : prev()
+            }), allow_calls);
+        }
+        var newexp = expr_atom(false), args;
+        if (is("punc", "(")) {
+            next();
+            args = expr_list(")", true);
+        } else {
+            args = [];
+        }
+        var call = new AST_New({
+            start      : start,
+            expression : newexp,
+            args       : args,
+            end        : prev()
+        });
+        annotate(call);
+        return subscripts(call, allow_calls);
+    };
+
+    function as_atom_node() {
+        var tok = S.token, ret;
+        switch (tok.type) {
+          case "name":
+            ret = _make_symbol(AST_SymbolRef);
+            break;
+          case "num":
+            if (tok.value === Infinity) {
+                // very large float values are parsed as Infinity
+                ret = new AST_Infinity({
+                    start: tok,
+                    end: tok,
+                });
+            } else {
+                ret = new AST_Number({
+                    start: tok,
+                    end: tok,
+                    value: tok.value,
+                    raw: LATEST_RAW
+                });
+            }
+            break;
+          case "big_int":
+            ret = new AST_BigInt({
+                start: tok,
+                end: tok,
+                value: tok.value,
+                raw: LATEST_RAW,
+            });
+            break;
+          case "string":
+            ret = new AST_String({
+                start : tok,
+                end   : tok,
+                value : tok.value,
+                quote : tok.quote
+            });
+            annotate(ret);
+            break;
+          case "regexp":
+            const [_, source, flags] = tok.value.match(/^\/(.*)\/(\w*)$/);
+
+            ret = new AST_RegExp({ start: tok, end: tok, value: { source, flags } });
+            break;
+          case "atom":
+            switch (tok.value) {
+              case "false":
+                ret = new AST_False({ start: tok, end: tok });
+                break;
+              case "true":
+                ret = new AST_True({ start: tok, end: tok });
+                break;
+              case "null":
+                ret = new AST_Null({ start: tok, end: tok });
+                break;
+            }
+            break;
+        }
+        next();
+        return ret;
+    }
+
+    function to_fun_args(ex, default_seen_above) {
+        var insert_default = function(ex, default_value) {
+            if (default_value) {
+                return new AST_DefaultAssign({
+                    start: ex.start,
+                    left: ex,
+                    operator: "=",
+                    right: default_value,
+                    end: default_value.end
+                });
+            }
+            return ex;
+        };
+        if (ex instanceof AST_Object) {
+            return insert_default(new AST_Destructuring({
+                start: ex.start,
+                end: ex.end,
+                is_array: false,
+                names: ex.properties.map(prop => to_fun_args(prop))
+            }), default_seen_above);
+        } else if (ex instanceof AST_ObjectKeyVal) {
+            ex.value = to_fun_args(ex.value);
+            return insert_default(ex, default_seen_above);
+        } else if (ex instanceof AST_Hole) {
+            return ex;
+        } else if (ex instanceof AST_Destructuring) {
+            ex.names = ex.names.map(name => to_fun_args(name));
+            return insert_default(ex, default_seen_above);
+        } else if (ex instanceof AST_SymbolRef) {
+            return insert_default(new AST_SymbolFunarg({
+                name: ex.name,
+                start: ex.start,
+                end: ex.end
+            }), default_seen_above);
+        } else if (ex instanceof AST_Expansion) {
+            ex.expression = to_fun_args(ex.expression);
+            return insert_default(ex, default_seen_above);
+        } else if (ex instanceof AST_Array) {
+            return insert_default(new AST_Destructuring({
+                start: ex.start,
+                end: ex.end,
+                is_array: true,
+                names: ex.elements.map(elm => to_fun_args(elm))
+            }), default_seen_above);
+        } else if (ex instanceof AST_Assign) {
+            return insert_default(to_fun_args(ex.left, ex.right), default_seen_above);
+        } else if (ex instanceof AST_DefaultAssign) {
+            ex.left = to_fun_args(ex.left);
+            return ex;
+        } else {
+            croak("Invalid function parameter", ex.start.line, ex.start.col);
+        }
+    }
+
+    var expr_atom = function(allow_calls, allow_arrows) {
+        if (is("operator", "new")) {
+            return new_(allow_calls);
+        }
+        if (is("name", "import") && is_token(peek(), "punc", ".")) {
+            return parse_import_expr(allow_calls);
+        }
+        var start = S.token;
+        var peeked;
+        var async = is("name", "async")
+            && (peeked = peek()).value != "["
+            && peeked.type != "arrow"
+            && as_atom_node();
+        if (is("punc")) {
+            switch (S.token.value) {
+              case "(":
+                if (async && !allow_calls) break;
+                var exprs = params_or_seq_(allow_arrows, !async);
+                if (allow_arrows && is("arrow", "=>")) {
+                    return arrow_function(start, exprs.map(e => to_fun_args(e)), !!async);
+                }
+                var ex = async ? new AST_Call({
+                    expression: async,
+                    args: exprs
+                }) : to_expr_or_sequence(start, exprs);
+                if (ex.start) {
+                    const outer_comments_before = start.comments_before.length;
+                    outer_comments_before_counts.set(start, outer_comments_before);
+                    ex.start.comments_before.unshift(...start.comments_before);
+                    start.comments_before = ex.start.comments_before;
+                    if (outer_comments_before == 0 && start.comments_before.length > 0) {
+                        var comment = start.comments_before[0];
+                        if (!comment.nlb) {
+                            comment.nlb = start.nlb;
+                            start.nlb = false;
+                        }
+                    }
+                    start.comments_after = ex.start.comments_after;
+                }
+                ex.start = start;
+                var end = prev();
+                if (ex.end) {
+                    end.comments_before = ex.end.comments_before;
+                    ex.end.comments_after.push(...end.comments_after);
+                    end.comments_after = ex.end.comments_after;
+                }
+                ex.end = end;
+                if (ex instanceof AST_Call) annotate(ex);
+                return subscripts(ex, allow_calls);
+              case "[":
+                return subscripts(array_(), allow_calls);
+              case "{":
+                return subscripts(object_or_destructuring_(), allow_calls);
+            }
+            if (!async) unexpected();
+        }
+        if (allow_arrows && is("name") && is_token(peek(), "arrow")) {
+            var param = new AST_SymbolFunarg({
+                name: S.token.value,
+                start: start,
+                end: start,
+            });
+            next();
+            return arrow_function(start, [param], !!async);
+        }
+        if (is("keyword", "function")) {
+            next();
+            var func = function_(AST_Function, false, !!async);
+            func.start = start;
+            func.end = prev();
+            return subscripts(func, allow_calls);
+        }
+        if (async) return subscripts(async, allow_calls);
+        if (is("keyword", "class")) {
+            next();
+            var cls = class_(AST_ClassExpression);
+            cls.start = start;
+            cls.end = prev();
+            return subscripts(cls, allow_calls);
+        }
+        if (is("template_head")) {
+            return subscripts(template_string(), allow_calls);
+        }
+        if (ATOMIC_START_TOKEN.has(S.token.type)) {
+            return subscripts(as_atom_node(), allow_calls);
+        }
+        unexpected();
+    };
+
+    function template_string() {
+        var segments = [], start = S.token;
+
+        segments.push(new AST_TemplateSegment({
+            start: S.token,
+            raw: TEMPLATE_RAWS.get(S.token),
+            value: S.token.value,
+            end: S.token
+        }));
+
+        while (!S.token.template_end) {
+            next();
+            handle_regexp();
+            segments.push(expression(true));
+
+            segments.push(new AST_TemplateSegment({
+                start: S.token,
+                raw: TEMPLATE_RAWS.get(S.token),
+                value: S.token.value,
+                end: S.token
+            }));
+        }
+        next();
+
+        return new AST_TemplateString({
+            start: start,
+            segments: segments,
+            end: S.token
+        });
+    }
+
+    function expr_list(closing, allow_trailing_comma, allow_empty) {
+        var first = true, a = [];
+        while (!is("punc", closing)) {
+            if (first) first = false; else expect(",");
+            if (allow_trailing_comma && is("punc", closing)) break;
+            if (is("punc", ",") && allow_empty) {
+                a.push(new AST_Hole({ start: S.token, end: S.token }));
+            } else if (is("expand", "...")) {
+                next();
+                a.push(new AST_Expansion({start: prev(), expression: expression(),end: S.token}));
+            } else {
+                a.push(expression(false));
+            }
+        }
+        next();
+        return a;
+    }
+
+    var array_ = embed_tokens(function() {
+        expect("[");
+        return new AST_Array({
+            elements: expr_list("]", !options.strict, true)
+        });
+    });
+
+    var create_accessor = embed_tokens((is_generator, is_async) => {
+        return function_(AST_Accessor, is_generator, is_async);
+    });
+
+    var object_or_destructuring_ = embed_tokens(function object_or_destructuring_() {
+        var start = S.token, first = true, a = [];
+        expect("{");
+        while (!is("punc", "}")) {
+            if (first) first = false; else expect(",");
+            if (!options.strict && is("punc", "}"))
+                // allow trailing comma
+                break;
+
+            start = S.token;
+            if (start.type == "expand") {
+                next();
+                a.push(new AST_Expansion({
+                    start: start,
+                    expression: expression(false),
+                    end: prev(),
+                }));
+                continue;
+            }
+            if(is("privatename")) {
+                croak("private fields are not allowed in an object");
+            }
+            var name = as_property_name();
+            var value;
+
+            // Check property and fetch value
+            if (!is("punc", ":")) {
+                var concise = object_or_class_property(name, start);
+                if (concise) {
+                    a.push(concise);
+                    continue;
+                }
+
+                value = new AST_SymbolRef({
+                    start: prev(),
+                    name: name,
+                    end: prev()
+                });
+            } else if (name === null) {
+                unexpected(prev());
+            } else {
+                next(); // `:` - see first condition
+                value = expression(false);
+            }
+
+            // Check for default value and alter value accordingly if necessary
+            if (is("operator", "=")) {
+                next();
+                value = new AST_Assign({
+                    start: start,
+                    left: value,
+                    operator: "=",
+                    right: expression(false),
+                    logical: false,
+                    end: prev()
+                });
+            }
+
+            // Create property
+            const kv = new AST_ObjectKeyVal({
+                start: start,
+                quote: start.quote,
+                key: name,
+                value: value,
+                end: prev()
+            });
+            a.push(annotate(kv));
+        }
+        next();
+        return new AST_Object({ properties: a });
+    });
+
+    function class_(KindOfClass, is_export_default) {
+        var start, method, class_name, extends_, properties = [];
+
+        S.input.push_directives_stack(); // Push directive stack, but not scope stack
+        S.input.add_directive("use strict");
+
+        if (S.token.type == "name" && S.token.value != "extends") {
+            class_name = as_symbol(KindOfClass === AST_DefClass ? AST_SymbolDefClass : AST_SymbolClass);
+        }
+
+        if (KindOfClass === AST_DefClass && !class_name) {
+            if (is_export_default) {
+                KindOfClass = AST_ClassExpression;
+            } else {
+                unexpected();
+            }
+        }
+
+        if (S.token.value == "extends") {
+            next();
+            extends_ = expression(true);
+        }
+
+        expect("{");
+        // mark in class feild,
+        const save_in_class = S.in_class;
+        S.in_class = true;
+        while (is("punc", ";")) { next(); }  // Leading semicolons are okay in class bodies.
+        while (!is("punc", "}")) {
+            start = S.token;
+            method = object_or_class_property(as_property_name(), start, true);
+            if (!method) { unexpected(); }
+            properties.push(method);
+            while (is("punc", ";")) { next(); }
+        }
+        // mark in class feild,
+        S.in_class = save_in_class;
+
+        S.input.pop_directives_stack();
+
+        next();
+
+        return new KindOfClass({
+            start: start,
+            name: class_name,
+            extends: extends_,
+            properties: properties,
+            end: prev(),
+        });
+    }
+
+    function object_or_class_property(name, start, is_class) {
+        const get_symbol_ast = (name, SymbolClass) => {
+            if (typeof name === "string") {
+                return new SymbolClass({ start, name, end: prev() });
+            } else if (name === null) {
+                unexpected();
+            }
+            return name;
+        };
+
+        var is_private = prev().type === "privatename";
+        const is_not_method_start = () =>
+            !is("punc", "(") && !is("punc", ",") && !is("punc", "}") && !is("punc", ";") && !is("operator", "=") && !is_private;
+
+        var is_async = false;
+        var is_static = false;
+        var is_generator = false;
+        var accessor_type = null;
+
+        if (is_class && name === "static" && is_not_method_start()) {
+            const static_block = class_static_block();
+            if (static_block != null) {
+                return static_block;
+            }
+            is_static = true;
+            name = as_property_name();
+        }
+        if (name === "async" && is_not_method_start()) {
+            is_async = true;
+            name = as_property_name();
+        }
+        if (prev().type === "operator" && prev().value === "*") {
+            is_generator = true;
+            name = as_property_name();
+        }
+        if ((name === "get" || name === "set") && is_not_method_start()) {
+            accessor_type = name;
+            name = as_property_name();
+        }
+        if (!is_private && prev().type === "privatename") {
+            is_private = true;
+        }
+
+        const property_token = prev();
+
+        if (accessor_type != null) {
+            if (!is_private) {
+                const AccessorClass = accessor_type === "get"
+                    ? AST_ObjectGetter
+                    : AST_ObjectSetter;
+
+                name = get_symbol_ast(name, AST_SymbolMethod);
+                return annotate(new AccessorClass({
+                    start,
+                    static: is_static,
+                    key: name,
+                    quote: name instanceof AST_SymbolMethod ? property_token.quote : undefined,
+                    value: create_accessor(),
+                    end: prev()
+                }));
+            } else {
+                const AccessorClass = accessor_type === "get"
+                    ? AST_PrivateGetter
+                    : AST_PrivateSetter;
+
+                return annotate(new AccessorClass({
+                    start,
+                    static: is_static,
+                    key: get_symbol_ast(name, AST_SymbolMethod),
+                    value: create_accessor(),
+                    end: prev(),
+                }));
+            }
+        }
+
+        if (is("punc", "(")) {
+            name = get_symbol_ast(name, AST_SymbolMethod);
+            const AST_MethodVariant = is_private
+                ? AST_PrivateMethod
+                : AST_ConciseMethod;
+            var node = new AST_MethodVariant({
+                start       : start,
+                static      : is_static,
+                key         : name,
+                quote       : name instanceof AST_SymbolMethod ?
+                              property_token.quote : undefined,
+                value       : create_accessor(is_generator, is_async),
+                end         : prev()
+            });
+            return annotate(node);
+        }
+
+        if (is_class) {
+            const AST_SymbolVariant = is_private
+                ? AST_SymbolPrivateProperty
+                : AST_SymbolClassProperty;
+            const AST_ClassPropertyVariant = is_private
+                ? AST_ClassPrivateProperty
+                : AST_ClassProperty;
+
+            const key = get_symbol_ast(name, AST_SymbolVariant);
+            const quote = key instanceof AST_SymbolClassProperty
+                ? property_token.quote
+                : undefined;
+            if (is("operator", "=")) {
+                next();
+                return annotate(
+                    new AST_ClassPropertyVariant({
+                        start,
+                        static: is_static,
+                        quote,
+                        key,
+                        value: expression(false),
+                        end: prev()
+                    })
+                );
+            } else if (
+                is("name")
+                || is("privatename")
+                || is("punc", "[")
+                || is("operator", "*")
+                || is("punc", ";")
+                || is("punc", "}")
+                || is("string")
+                || is("num")
+                || is("big_int")
+            ) {
+                return annotate(
+                    new AST_ClassPropertyVariant({
+                        start,
+                        static: is_static,
+                        quote,
+                        key,
+                        end: prev()
+                    })
+                );
+            }
+        }
+    }
+
+    function class_static_block() {
+        if (!is("punc", "{")) {
+            return null;
+        }
+
+        const start = S.token;
+        const body = [];
+
+        next();
+
+        while (!is("punc", "}")) {
+            body.push(statement());
+        }
+
+        next();
+
+        return new AST_ClassStaticBlock({ start, body, end: prev() });
+    }
+
+    function maybe_import_attributes() {
+        if (
+            (is("keyword", "with") || is("name", "assert"))
+            && !has_newline_before(S.token)
+        ) {
+            next();
+            return object_or_destructuring_();
+        }
+        return null;
+    }
+
+    function import_statement() {
+        var start = prev();
+
+        // import source x from "..."
+        // import defer * as x from "..."
+        var phase = null;
+        if (is("name", "source") || is("name", "defer")) {
+            var peeked = peek();
+            if (!is_token(peeked, "name", "from") && !is_token(peeked, "punc", ",")) {
+                phase = S.token.value;
+                next();
+            }
+        }
+
+        var imported_name;
+        var imported_names;
+        if (is("name")) {
+            imported_name = as_symbol(AST_SymbolImport);
+        }
+
+        if (is("punc", ",")) {
+            next();
+        }
+
+        imported_names = map_names(true);
+
+        if (imported_names || imported_name) {
+            expect_token("name", "from");
+        }
+        var mod_str = S.token;
+        if (mod_str.type !== "string") {
+            unexpected();
+        }
+        next();
+
+        const attributes = maybe_import_attributes();
+
+        return new AST_Import({
+            start,
+            imported_name,
+            imported_names,
+            module_name: new AST_String({
+                start: mod_str,
+                value: mod_str.value,
+                quote: mod_str.quote,
+                end: mod_str,
+            }),
+            attributes,
+            phase,
+            end: S.token,
+        });
+    }
+
+    //   import.meta
+    //   import.source("module")
+    //   import.defer("module")
+    function parse_import_expr(allow_calls) {
+        var start = S.token;
+        expect_token("name", "import");
+        expect_token("punc", ".");
+        if (is("name", "source") || is("name", "defer")) {
+            var phase = S.token.value;
+            next();
+            if (!is("punc", "(")) {
+                croak("'import." + phase + "' can only be used in a dynamic import");
+            }
+            next();
+            var args = expr_list(")");
+            return subscripts(new AST_DynamicImport({
+                start: start,
+                phase: phase,
+                args: args,
+                end: prev()
+            }), allow_calls);
+        }
+        expect_token("name", "meta");
+        return subscripts(new AST_ImportMeta({
+            start: start,
+            end: prev()
+        }), allow_calls);
+    }
+
+    function map_name(is_import) {
+        function make_symbol(type, quote) {
+            return new type({
+                name: as_property_name(),
+                quote: quote || undefined,
+                start: prev(),
+                end: prev()
+            });
+        }
+
+        var foreign_type = is_import ? AST_SymbolImportForeign : AST_SymbolExportForeign;
+        var type = is_import ? AST_SymbolImport : AST_SymbolExport;
+        var start = S.token;
+        var foreign_name;
+        var name;
+
+        if (is_import) {
+            foreign_name = make_symbol(foreign_type, start.quote);
+        } else {
+            name = make_symbol(type, start.quote);
+        }
+        if (is("name", "as")) {
+            next();  // The "as" word
+            if (is_import) {
+                name = make_symbol(type);
+            } else {
+                foreign_name = make_symbol(foreign_type, S.token.quote);
+            }
+        } else {
+            if (is_import) {
+                name = new type(foreign_name);
+            } else {
+                foreign_name = new foreign_type(name);
+            }
+        }
+
+        return new AST_NameMapping({
+            start: start,
+            foreign_name: foreign_name,
+            name: name,
+            end: prev(),
+        });
+    }
+
+    function map_nameAsterisk(is_import, import_or_export_foreign_name) {
+        var foreign_type = is_import ? AST_SymbolImportForeign : AST_SymbolExportForeign;
+        var type = is_import ? AST_SymbolImport : AST_SymbolExport;
+        var start = S.token;
+        var name, foreign_name;
+        var end = prev();
+
+        if (is_import) {
+            name = import_or_export_foreign_name;
+        } else {
+            foreign_name = import_or_export_foreign_name;
+        }
+
+        name = name || new type({
+            start: start,
+            name: "*",
+            end: end,
+        });
+
+        foreign_name = foreign_name || new foreign_type({
+            start: start,
+            name: "*",
+            end: end,
+        });
+
+        return new AST_NameMapping({
+            start: start,
+            foreign_name: foreign_name,
+            name: name,
+            end: end,
+        });
+    }
+
+    function map_names(is_import) {
+        var names;
+        if (is("punc", "{")) {
+            next();
+            names = [];
+            while (!is("punc", "}")) {
+                names.push(map_name(is_import));
+                if (is("punc", ",")) {
+                    next();
+                }
+            }
+            next();
+        } else if (is("operator", "*")) {
+            var name;
+            next();
+            if (is("name", "as")) {
+                next();  // The "as" word
+                name = is_import ? as_symbol(AST_SymbolImport) : as_symbol_or_string(AST_SymbolExportForeign);
+            }
+            names = [map_nameAsterisk(is_import, name)];
+        }
+        return names;
+    }
+
+    function export_statement() {
+        var start = S.token;
+        var is_default;
+        var exported_names;
+
+        if (is("keyword", "default")) {
+            is_default = true;
+            next();
+        } else if (exported_names = map_names(false)) {
+            if (is("name", "from")) {
+                next();
+
+                var mod_str = S.token;
+                if (mod_str.type !== "string") {
+                    unexpected();
+                }
+                next();
+
+                const attributes = maybe_import_attributes();
+
+                return new AST_Export({
+                    start: start,
+                    is_default: is_default,
+                    exported_names: exported_names,
+                    module_name: new AST_String({
+                        start: mod_str,
+                        value: mod_str.value,
+                        quote: mod_str.quote,
+                        end: mod_str,
+                    }),
+                    end: prev(),
+                    attributes
+                });
+            } else {
+                return new AST_Export({
+                    start: start,
+                    is_default: is_default,
+                    exported_names: exported_names,
+                    end: prev(),
+                });
+            }
+        }
+
+        var node;
+        var exported_value;
+        var exported_definition;
+        if (is("punc", "{")
+            || is_default
+                && (is("keyword", "class") || is("keyword", "function"))
+                && is_token(peek(), "punc")) {
+            exported_value = expression(false);
+            semicolon();
+        } else if ((node = statement(is_default)) instanceof AST_Definitions && is_default) {
+            unexpected(node.start);
+        } else if (
+            node instanceof AST_Definitions
+            || node instanceof AST_Defun
+            || node instanceof AST_DefClass
+        ) {
+            exported_definition = node;
+        } else if (
+            node instanceof AST_ClassExpression
+            || node instanceof AST_Function
+        ) {
+            exported_value = node;
+        } else if (node instanceof AST_SimpleStatement) {
+            exported_value = node.body;
+        } else {
+            unexpected(node.start);
+        }
+
+        return new AST_Export({
+            start: start,
+            is_default: is_default,
+            exported_value: exported_value,
+            exported_definition: exported_definition,
+            end: prev(),
+            attributes: null
+        });
+    }
+
+    function as_property_name() {
+        var tmp = S.token;
+        switch (tmp.type) {
+          case "punc":
+            if (tmp.value === "[") {
+                next();
+                var ex = expression(false);
+                expect("]");
+                return ex;
+            } else unexpected(tmp);
+          case "operator":
+            if (tmp.value === "*") {
+                next();
+                return null;
+            }
+            if (!["delete", "in", "instanceof", "new", "typeof", "void"].includes(tmp.value)) {
+                unexpected(tmp);
+            }
+            /* falls through */
+          case "name":
+          case "privatename":
+          case "string":
+          case "keyword":
+          case "atom":
+            next();
+            return tmp.value;
+          case "num":
+          case "big_int":
+            next();
+            return "" + tmp.value;
+          default:
+            unexpected(tmp);
+        }
+    }
+
+    function as_name() {
+        var tmp = S.token;
+        if (tmp.type != "name" && tmp.type != "privatename") unexpected();
+        next();
+        return tmp.value;
+    }
+
+    function _make_symbol(type) {
+        var name = S.token.value;
+        return new (name == "this" ? AST_This :
+                    name == "super" ? AST_Super :
+                    type)({
+            name  : String(name),
+            start : S.token,
+            end   : S.token
+        });
+    }
+
+    function _verify_symbol(sym) {
+        var name = sym.name;
+        if (is_in_generator() && name == "yield") {
+            token_error(sym.start, "Yield cannot be used as identifier inside generators");
+        }
+        if (S.input.has_directive("use strict")) {
+            if (name == "yield") {
+                token_error(sym.start, "Unexpected yield identifier inside strict mode");
+            }
+            if (sym instanceof AST_SymbolDeclaration && (name == "arguments" || name == "eval")) {
+                token_error(sym.start, "Unexpected " + name + " in strict mode");
+            }
+        }
+    }
+
+    function as_symbol(type, noerror) {
+        if (!is("name")) {
+            if (!noerror) croak("Name expected");
+            return null;
+        }
+        var sym = _make_symbol(type);
+        _verify_symbol(sym);
+        next();
+        return sym;
+    }
+
+    function as_symbol_or_string(type) {
+        if (!is("name")) {
+            if (!is("string")) {
+                croak("Name or string expected");
+            }
+            var tok = S.token;
+            var ret = new type({
+                start : tok,
+                end   : tok,
+                name : tok.value,
+                quote : tok.quote
+            });
+            next();
+            return ret;
+        }
+        var sym = _make_symbol(type);
+        _verify_symbol(sym);
+        next();
+        return sym;
+    }
+
+    // Annotate AST_Call, AST_Lambda or AST_New with the special comments
+    function annotate(node, before_token = node.start) {
+        var comments = before_token.comments_before;
+        const comments_outside_parens = outer_comments_before_counts.get(before_token);
+        var i = comments_outside_parens != null ? comments_outside_parens : comments.length;
+        while (--i >= 0) {
+            var comment = comments[i];
+            if (/[@#]__/.test(comment.value)) {
+                if (/[@#]__PURE__/.test(comment.value)) {
+                    set_annotation(node, _PURE);
+                    break;
+                }
+                if (/[@#]__INLINE__/.test(comment.value)) {
+                    set_annotation(node, _INLINE);
+                    break;
+                }
+                if (/[@#]__NOINLINE__/.test(comment.value)) {
+                    set_annotation(node, _NOINLINE);
+                    break;
+                }
+                if (/[@#]__KEY__/.test(comment.value)) {
+                    set_annotation(node, _KEY);
+                    break;
+                }
+                if (/[@#]__MANGLE_PROP__/.test(comment.value)) {
+                    set_annotation(node, _MANGLEPROP);
+                    break;
+                }
+            }
+        }
+        return node;
+    }
+
+    var subscripts = function(expr, allow_calls, is_chain) {
+        var start = expr.start;
+        if (is("punc", ".")) {
+            next();
+            if(is("privatename") && !S.in_class) 
+                croak("Private field must be used in an enclosing class");
+            const AST_DotVariant = is("privatename") ? AST_DotHash : AST_Dot;
+            return annotate(subscripts(new AST_DotVariant({
+                start      : start,
+                expression : expr,
+                optional   : false,
+                property   : as_name(),
+                end        : prev()
+            }), allow_calls, is_chain));
+        }
+        if (is("punc", "[")) {
+            next();
+            var prop = expression(true);
+            expect("]");
+            return annotate(subscripts(new AST_Sub({
+                start      : start,
+                expression : expr,
+                optional   : false,
+                property   : prop,
+                end        : prev()
+            }), allow_calls, is_chain));
+        }
+        if (allow_calls && is("punc", "(")) {
+            next();
+            var call = new AST_Call({
+                start      : start,
+                expression : expr,
+                optional   : false,
+                args       : call_args(),
+                end        : prev()
+            });
+            annotate(call);
+            return subscripts(call, true, is_chain);
+        }
+
+        // Optional chain
+        if (is("punc", "?.")) {
+            next();
+
+            let chain_contents;
+
+            if (allow_calls && is("punc", "(")) {
+                next();
+
+                const call = new AST_Call({
+                    start,
+                    optional: true,
+                    expression: expr,
+                    args: call_args(),
+                    end: prev()
+                });
+                annotate(call);
+
+                chain_contents = subscripts(call, true, true);
+            } else if (is("name") || is("privatename")) {
+                if(is("privatename") && !S.in_class) 
+                    croak("Private field must be used in an enclosing class");
+                const AST_DotVariant = is("privatename") ? AST_DotHash : AST_Dot;
+                chain_contents = annotate(subscripts(new AST_DotVariant({
+                    start,
+                    expression: expr,
+                    optional: true,
+                    property: as_name(),
+                    end: prev()
+                }), allow_calls, true));
+            } else if (is("punc", "[")) {
+                next();
+                const property = expression(true);
+                expect("]");
+                chain_contents = annotate(subscripts(new AST_Sub({
+                    start,
+                    expression: expr,
+                    optional: true,
+                    property,
+                    end: prev()
+                }), allow_calls, true));
+            }
+
+            if (!chain_contents) unexpected();
+
+            if (chain_contents instanceof AST_Chain) return chain_contents;
+
+            return new AST_Chain({
+                start,
+                expression: chain_contents,
+                end: prev()
+            });
+        }
+
+        if (is("template_head")) {
+            if (is_chain) {
+                // a?.b`c` is a syntax error
+                unexpected();
+            }
+
+            return subscripts(new AST_PrefixedTemplateString({
+                start: start,
+                prefix: expr,
+                template_string: template_string(),
+                end: prev()
+            }), allow_calls);
+        }
+        return expr;
+    };
+
+    function call_args() {
+        var args = [];
+        while (!is("punc", ")")) {
+            if (is("expand", "...")) {
+                next();
+                args.push(new AST_Expansion({
+                    start: prev(),
+                    expression: expression(false),
+                    end: prev()
+                }));
+            } else {
+                args.push(expression(false));
+            }
+            if (!is("punc", ")")) {
+                expect(",");
+            }
+        }
+        next();
+        return args;
+    }
+
+    var maybe_unary = function(allow_calls, allow_arrows) {
+        var start = S.token;
+        if (start.type == "name" && start.value == "await" && can_await()) {
+            next();
+            return _await_expression();
+        }
+        if (is("operator") && UNARY_PREFIX.has(start.value)) {
+            next();
+            handle_regexp();
+            var ex = make_unary(AST_UnaryPrefix, start, maybe_unary(allow_calls));
+            ex.start = start;
+            ex.end = prev();
+            return ex;
+        }
+        var val = expr_atom(allow_calls, allow_arrows);
+        while (is("operator") && UNARY_POSTFIX.has(S.token.value) && !has_newline_before(S.token)) {
+            if (val instanceof AST_Arrow) unexpected();
+            val = make_unary(AST_UnaryPostfix, S.token, val);
+            val.start = start;
+            val.end = S.token;
+            next();
+        }
+        return val;
+    };
+
+    function make_unary(ctor, token, expr) {
+        var op = token.value;
+        switch (op) {
+          case "++":
+          case "--":
+            if (!is_assignable(expr))
+                croak("Invalid use of " + op + " operator", token.line, token.col, token.pos);
+            break;
+          case "delete":
+            if (expr instanceof AST_SymbolRef && S.input.has_directive("use strict"))
+                croak("Calling delete on expression not allowed in strict mode", expr.start.line, expr.start.col, expr.start.pos);
+            break;
+        }
+        return new ctor({ operator: op, expression: expr });
+    }
+
+    var expr_op = function(left, min_prec, no_in) {
+        var op = is("operator") ? S.token.value : null;
+        if (op == "in" && no_in) op = null;
+        if (op == "**" && left instanceof AST_UnaryPrefix
+            /* unary token in front not allowed - parenthesis required */
+            && !is_token(left.start, "punc", "(")
+            && left.operator !== "--" && left.operator !== "++")
+                unexpected(left.start);
+        var prec = op != null ? PRECEDENCE[op] : null;
+        if (prec != null && (prec > min_prec || (op === "**" && min_prec === prec))) {
+            next();
+            var right = expr_ops(no_in, prec, true);
+            return expr_op(new AST_Binary({
+                start    : left.start,
+                left     : left,
+                operator : op,
+                right    : right,
+                end      : right.end
+            }), min_prec, no_in);
+        }
+        return left;
+    };
+
+    function expr_ops(no_in, min_prec, allow_calls, allow_arrows) {
+        // maybe_unary won't return us a AST_SymbolPrivateProperty
+        if (!no_in && min_prec < PRECEDENCE["in"] && is("privatename")) {
+            if(!S.in_class) {
+                croak("Private field must be used in an enclosing class");
+            }
+
+            const start = S.token;
+            const key = new AST_SymbolPrivateProperty({
+                start,
+                name: start.value,
+                end: start
+            });
+            next();
+            expect_token("operator", "in");
+
+            const private_in = new AST_PrivateIn({
+                start,
+                key,
+                value: expr_ops(no_in, PRECEDENCE["in"], true),
+                end: prev()
+            });
+
+            return expr_op(private_in, 0, no_in);
+        } else {
+            return expr_op(maybe_unary(allow_calls, allow_arrows), min_prec, no_in);
+        }
+    }
+
+    var maybe_conditional = function(no_in) {
+        var start = S.token;
+        var expr = expr_ops(no_in, 0, true, true);
+        if (is("operator", "?")) {
+            next();
+            var yes = expression(false);
+            expect(":");
+            return new AST_Conditional({
+                start       : start,
+                condition   : expr,
+                consequent  : yes,
+                alternative : expression(false, no_in),
+                end         : prev()
+            });
+        }
+        return expr;
+    };
+
+    function is_assignable(expr) {
+        return expr instanceof AST_PropAccess || expr instanceof AST_SymbolRef;
+    }
+
+    function to_destructuring(node) {
+        if (node instanceof AST_Object) {
+            node = new AST_Destructuring({
+                start: node.start,
+                names: node.properties.map(to_destructuring),
+                is_array: false,
+                end: node.end
+            });
+        } else if (node instanceof AST_Array) {
+            var names = [];
+
+            for (var i = 0; i < node.elements.length; i++) {
+                // Only allow expansion as last element
+                if (node.elements[i] instanceof AST_Expansion) {
+                    if (i + 1 !== node.elements.length) {
+                        token_error(node.elements[i].start, "Spread must the be last element in destructuring array");
+                    }
+                    node.elements[i].expression = to_destructuring(node.elements[i].expression);
+                }
+
+                names.push(to_destructuring(node.elements[i]));
+            }
+
+            node = new AST_Destructuring({
+                start: node.start,
+                names: names,
+                is_array: true,
+                end: node.end
+            });
+        } else if (node instanceof AST_ObjectProperty) {
+            node.value = to_destructuring(node.value);
+        } else if (node instanceof AST_Assign) {
+            node = new AST_DefaultAssign({
+                start: node.start,
+                left: node.left,
+                operator: "=",
+                right: node.right,
+                end: node.end
+            });
+        }
+        return node;
+    }
+
+    // In ES6, AssignmentExpression can also be an ArrowFunction
+    var maybe_assign = function(no_in) {
+        handle_regexp();
+        var start = S.token;
+
+        if (start.type == "name" && start.value == "yield") {
+            if (is_in_generator()) {
+                next();
+                return _yield_expression();
+            } else if (S.input.has_directive("use strict")) {
+                token_error(S.token, "Unexpected yield identifier inside strict mode");
+            }
+        }
+
+        var left = maybe_conditional(no_in);
+        var val = S.token.value;
+
+        if (is("operator") && ASSIGNMENT.has(val)) {
+            if (is_assignable(left) || (left = to_destructuring(left)) instanceof AST_Destructuring) {
+                next();
+
+                return new AST_Assign({
+                    start    : start,
+                    left     : left,
+                    operator : val,
+                    right    : maybe_assign(no_in),
+                    logical  : LOGICAL_ASSIGNMENT.has(val),
+                    end      : prev()
+                });
+            }
+            croak("Invalid assignment");
+        }
+        return left;
+    };
+
+    var to_expr_or_sequence = function(start, exprs) {
+        if (exprs.length === 1) {
+            return exprs[0];
+        } else if (exprs.length > 1) {
+            return new AST_Sequence({ start, expressions: exprs, end: peek() });
+        } else {
+            croak("Invalid parenthesized expression");
+        }
+    };
+
+    var expression = function(commas, no_in) {
+        var start = S.token;
+        var exprs = [];
+        while (true) {
+            exprs.push(maybe_assign(no_in));
+            if (!commas || !is("punc", ",")) break;
+            next();
+            commas = true;
+        }
+        return to_expr_or_sequence(start, exprs);
+    };
+
+    function in_loop(cont) {
+        ++S.in_loop;
+        var ret = cont();
+        --S.in_loop;
+        return ret;
+    }
+
+    if (options.expression) {
+        return expression(true);
+    }
+
+    return (function parse_toplevel() {
+        var start = S.token;
+        var body = [];
+        S.input.push_directives_stack();
+        if (options.module) S.input.add_directive("use strict");
+        while (!is("eof")) {
+            body.push(statement());
+        }
+        S.input.pop_directives_stack();
+        var end = prev();
+        var toplevel = options.toplevel;
+        if (toplevel) {
+            toplevel.body = toplevel.body.concat(body);
+            toplevel.end = end;
+        } else {
+            toplevel = new AST_Toplevel({ start: start, body: body, end: end });
+        }
+        TEMPLATE_RAWS = new Map();
+        return toplevel;
+    })();
+
+}
+
+export {
+    get_full_char_code,
+    get_full_char,
+    is_identifier_char,
+    is_basic_identifier_string,
+    is_identifier_string,
+    is_surrogate_pair_head,
+    is_surrogate_pair_tail,
+    js_error,
+    JS_Parse_Error,
+    parse,
+    PRECEDENCE,
+    ALL_RESERVED_WORDS,
+    tokenizer,
+};
Index: frontend/node_modules/terser/lib/propmangle.js
===================================================================
--- frontend/node_modules/terser/lib/propmangle.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/propmangle.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,434 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+"use strict";
+/* global global, self */
+
+import {
+    defaults,
+    push_uniq,
+    has_annotation,
+    clear_annotation,
+} from "./utils/index.js";
+import { base54 } from "./scope.js";
+import {
+    AST_Binary,
+    AST_Call,
+    AST_ClassPrivateProperty,
+    AST_Conditional,
+    AST_Dot,
+    AST_DotHash,
+    AST_ObjectKeyVal,
+    AST_ObjectProperty,
+    AST_PrivateMethod,
+    AST_PrivateGetter,
+    AST_PrivateSetter,
+    AST_PrivateIn,
+    AST_Sequence,
+    AST_String,
+    AST_Sub,
+    TreeTransformer,
+    TreeWalker,
+    _KEY,
+    _MANGLEPROP,
+
+    walk,
+} from "./ast.js";
+import { domprops } from "../tools/domprops.js";
+
+function find_builtins(reserved) {
+    domprops.forEach(add);
+
+    // Compatibility fix for some standard defined globals not defined on every js environment
+    var new_globals = ["Symbol", "Map", "Promise", "Proxy", "Reflect", "Set", "WeakMap", "WeakSet"];
+    var objects = {};
+    var global_ref = typeof global === "object" ? global : self;
+
+    new_globals.forEach(function (new_global) {
+        objects[new_global] = global_ref[new_global] || function() {};
+    });
+
+    [
+        "null",
+        "true",
+        "false",
+        "NaN",
+        "Infinity",
+        "-Infinity",
+        "undefined",
+    ].forEach(add);
+    [ Object, Array, Function, Number,
+      String, Boolean, Error, Math,
+      Date, RegExp, objects.Symbol, ArrayBuffer,
+      DataView, decodeURI, decodeURIComponent,
+      encodeURI, encodeURIComponent, eval, EvalError,
+      Float32Array, Float64Array, Int8Array, Int16Array,
+      Int32Array, isFinite, isNaN, JSON, objects.Map, parseFloat,
+      parseInt, objects.Promise, objects.Proxy, RangeError, ReferenceError,
+      objects.Reflect, objects.Set, SyntaxError, TypeError, Uint8Array,
+      Uint8ClampedArray, Uint16Array, Uint32Array, URIError,
+      objects.WeakMap, objects.WeakSet
+    ].forEach(function(ctor) {
+        Object.getOwnPropertyNames(ctor).map(add);
+        if (ctor.prototype) {
+            Object.getOwnPropertyNames(ctor.prototype).map(add);
+        }
+    });
+    function add(name) {
+        reserved.add(name);
+    }
+}
+
+function reserve_quoted_keys(ast, reserved) {
+    function add(name) {
+        push_uniq(reserved, name);
+    }
+
+    ast.walk(new TreeWalker(function(node) {
+        if (node instanceof AST_ObjectKeyVal && node.quote) {
+            add(node.key);
+        } else if (node instanceof AST_ObjectProperty && node.quote) {
+            add(node.key.name);
+        } else if (node instanceof AST_Sub) {
+            addStrings(node.property, add);
+        }
+    }));
+}
+
+function addStrings(node, add) {
+    node.walk(new TreeWalker(function(node) {
+        if (node instanceof AST_Sequence) {
+            addStrings(node.tail_node(), add);
+        } else if (node instanceof AST_String) {
+            add(node.value);
+        } else if (node instanceof AST_Conditional) {
+            addStrings(node.consequent, add);
+            addStrings(node.alternative, add);
+        }
+        return true;
+    }));
+}
+
+function mangle_private_properties(ast, options) {
+    var cprivate = -1;
+    var private_cache = new Map();
+    var nth_identifier = options.nth_identifier || base54;
+
+    ast =  ast.transform(new TreeTransformer(function(node) {
+        if (
+            node instanceof AST_ClassPrivateProperty
+            || node instanceof AST_PrivateMethod
+            || node instanceof AST_PrivateGetter
+            || node instanceof AST_PrivateSetter
+            || node instanceof AST_PrivateIn
+        ) {
+            node.key.name = mangle_private(node.key.name);
+        } else if (node instanceof AST_DotHash) {
+            node.property = mangle_private(node.property);
+        }
+    }));
+    return ast;
+
+    function mangle_private(name) {
+        let mangled = private_cache.get(name);
+        if (!mangled) {
+            mangled = nth_identifier.get(++cprivate);
+            private_cache.set(name, mangled);
+        }
+
+        return mangled;
+    }
+}
+
+function find_annotated_props(ast) {
+    var annotated_props = new Set();
+    walk(ast, node => {
+        if (
+            node instanceof AST_ClassPrivateProperty
+            || node instanceof AST_PrivateMethod
+            || node instanceof AST_PrivateGetter
+            || node instanceof AST_PrivateSetter
+            || node instanceof AST_DotHash
+        ) {
+            // handled by mangle_private_properties
+        } else if (node instanceof AST_ObjectKeyVal) {
+            if (typeof node.key == "string" && has_annotation(node, _MANGLEPROP)) {
+                annotated_props.add(node.key);
+            }
+        } else if (node instanceof AST_ObjectProperty) {
+            // setter or getter, since KeyVal is handled above
+            if (has_annotation(node, _MANGLEPROP)) {
+                annotated_props.add(node.key.name);
+            }
+        } else if (node instanceof AST_Dot) {
+            if (has_annotation(node, _MANGLEPROP)) {
+                annotated_props.add(node.property);
+            }
+        } else if (node instanceof AST_Sub) {
+            if (node.property instanceof AST_String && has_annotation(node, _MANGLEPROP)) {
+                annotated_props.add(node.property.value);
+            }
+        }
+    });
+    return annotated_props;
+}
+
+function mangle_properties(ast, options, annotated_props = find_annotated_props(ast)) {
+    options = defaults(options, {
+        builtins: false,
+        cache: null,
+        debug: false,
+        keep_quoted: false,
+        nth_identifier: base54,
+        only_cache: false,
+        regex: null,
+        reserved: null,
+        undeclared: false,
+        only_annotated: false,
+    }, true);
+
+    var nth_identifier = options.nth_identifier;
+
+    var reserved_option = options.reserved;
+    if (!Array.isArray(reserved_option)) reserved_option = [reserved_option];
+    var reserved = new Set(reserved_option);
+    if (!options.builtins) find_builtins(reserved);
+
+    var cname = -1;
+
+    var cache;
+    if (options.cache) {
+        cache = options.cache.props;
+    } else {
+        cache = new Map();
+    }
+
+    var only_annotated = options.only_annotated;
+    var regex = options.regex && new RegExp(options.regex);
+
+    // note debug is either false (disabled), or a string of the debug suffix to use (enabled).
+    // note debug may be enabled as an empty string, which is falsey. Also treat passing 'true'
+    // the same as passing an empty string.
+    var debug = options.debug !== false;
+    var debug_name_suffix;
+    if (debug) {
+        debug_name_suffix = (options.debug === true ? "" : options.debug);
+    }
+
+    var names_to_mangle = new Set();
+    var unmangleable = new Set();
+    // Track each already-mangled name to prevent nth_identifier from generating
+    // the same name.
+    cache.forEach((mangled_name) => unmangleable.add(mangled_name));
+
+    var keep_quoted = !!options.keep_quoted;
+
+    // step 1: find candidates to mangle
+    ast.walk(new TreeWalker(function(node) {
+        if (
+            node instanceof AST_ClassPrivateProperty
+            || node instanceof AST_PrivateMethod
+            || node instanceof AST_PrivateGetter
+            || node instanceof AST_PrivateSetter
+            || node instanceof AST_DotHash
+        ) {
+            // handled by mangle_private_properties
+        } else if (node instanceof AST_ObjectKeyVal) {
+            if (typeof node.key == "string" && (!keep_quoted || !node.quote)) {
+                add(node.key);
+            }
+        } else if (node instanceof AST_ObjectProperty) {
+            // setter or getter, since KeyVal is handled above
+            if (!keep_quoted || !node.quote) {
+                add(node.key.name);
+            }
+        } else if (node instanceof AST_Dot) {
+            var declared = !!options.undeclared;
+            if (!declared) {
+                var root = node;
+                while (root.expression) {
+                    root = root.expression;
+                }
+                declared = !(root.thedef && root.thedef.undeclared);
+            }
+            if (declared &&
+                (!keep_quoted || !node.quote)) {
+                add(node.property);
+            }
+        } else if (node instanceof AST_Sub) {
+            if (!keep_quoted) {
+                addStrings(node.property, add);
+            }
+        } else if (node instanceof AST_Call
+            && node.expression.print_to_string() == "Object.defineProperty") {
+            addStrings(node.args[1], add);
+        } else if (node instanceof AST_Binary && node.operator === "in") {
+            addStrings(node.left, add);
+        } else if (node instanceof AST_String && has_annotation(node, _KEY)) {
+            add(node.value);
+        }
+    }));
+
+    // step 2: transform the tree, renaming properties
+    return ast.transform(new TreeTransformer(function(node) {
+        if (
+            node instanceof AST_ClassPrivateProperty
+            || node instanceof AST_PrivateMethod
+            || node instanceof AST_PrivateGetter
+            || node instanceof AST_PrivateSetter
+            || node instanceof AST_DotHash
+        ) {
+            // handled by mangle_private_properties
+        } else if (node instanceof AST_ObjectKeyVal) {
+            if (typeof node.key == "string" && (!keep_quoted || !node.quote)) {
+                node.key = mangle(node.key);
+            }
+        } else if (node instanceof AST_ObjectProperty) {
+            // setter, getter, method or class field
+            if (!keep_quoted || !node.quote) {
+                if (!node.computed_key()) {
+                    node.key.name = mangle(node.key.name);
+                }
+            }
+        } else if (node instanceof AST_Dot) {
+            if (!keep_quoted || !node.quote) {
+                node.property = mangle(node.property);
+            }
+        } else if (!keep_quoted && node instanceof AST_Sub) {
+            node.property = mangleStrings(node.property);
+        } else if (node instanceof AST_Call
+            && node.expression.print_to_string() == "Object.defineProperty") {
+            node.args[1] = mangleStrings(node.args[1]);
+        } else if (node instanceof AST_Binary && node.operator === "in") {
+            node.left = mangleStrings(node.left);
+        } else if (node instanceof AST_String && has_annotation(node, _KEY)) {
+            // Clear _KEY annotation to prevent double mangling
+            clear_annotation(node, _KEY);
+            node.value = mangle(node.value);
+        }
+    }));
+
+    // only function declarations after this line
+
+    function can_mangle(name) {
+        if (unmangleable.has(name)) return false;
+        if (reserved.has(name)) return false;
+        if (options.only_cache) {
+            return cache.has(name);
+        }
+        if (/^-?[0-9]+(\.[0-9]+)?(e[+-][0-9]+)?$/.test(name)) return false;
+        return true;
+    }
+
+    function should_mangle(name) {
+        if (only_annotated && !annotated_props.has(name)) return false;
+        if (regex && !regex.test(name)) {
+            return annotated_props.has(name);
+        }
+        if (reserved.has(name)) return false;
+        return cache.has(name)
+            || names_to_mangle.has(name);
+    }
+
+    function add(name) {
+        if (can_mangle(name)) {
+            names_to_mangle.add(name);
+        }
+
+        if (!should_mangle(name)) {
+            unmangleable.add(name);
+        }
+    }
+
+    function mangle(name) {
+        if (!should_mangle(name)) {
+            return name;
+        }
+
+        var mangled = cache.get(name);
+        if (!mangled) {
+            if (debug) {
+                // debug mode: use a prefix and suffix to preserve readability, e.g. o.foo -> o._$foo$NNN_.
+                var debug_mangled = "_$" + name + "$" + debug_name_suffix + "_";
+
+                if (can_mangle(debug_mangled)) {
+                    mangled = debug_mangled;
+                }
+            }
+
+            // either debug mode is off, or it is on and we could not use the mangled name
+            if (!mangled) {
+                do {
+                    mangled = nth_identifier.get(++cname);
+                } while (!can_mangle(mangled));
+            }
+
+            cache.set(name, mangled);
+        }
+        return mangled;
+    }
+
+    function mangleStrings(node) {
+        return node.transform(new TreeTransformer(function(node) {
+            if (node instanceof AST_Sequence) {
+                var last = node.expressions.length - 1;
+                node.expressions[last] = mangleStrings(node.expressions[last]);
+            } else if (node instanceof AST_String) {
+                // Clear _KEY annotation to prevent double mangling
+                clear_annotation(node, _KEY);
+                node.value = mangle(node.value);
+            } else if (node instanceof AST_Conditional) {
+                node.consequent = mangleStrings(node.consequent);
+                node.alternative = mangleStrings(node.alternative);
+            }
+            return node;
+        }));
+    }
+}
+
+export {
+    reserve_quoted_keys,
+    mangle_properties,
+    mangle_private_properties,
+    find_annotated_props,
+};
Index: frontend/node_modules/terser/lib/scope.js
===================================================================
--- frontend/node_modules/terser/lib/scope.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/scope.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,1069 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+"use strict";
+
+import {
+    defaults,
+    keep_name,
+    mergeSort,
+    push_uniq,
+    make_node,
+    return_false,
+    return_this,
+    return_true,
+    string_template,
+} from "./utils/index.js";
+import {
+    AST_Arrow,
+    AST_Block,
+    AST_Call,
+    AST_Class,
+    AST_Conditional,
+    AST_DefClass,
+    AST_Defun,
+    AST_Destructuring,
+    AST_Dot,
+    AST_DotHash,
+    AST_Export,
+    AST_For,
+    AST_ForIn,
+    AST_ForOf,
+    AST_Function,
+    AST_Import,
+    AST_IterationStatement,
+    AST_Label,
+    AST_LabeledStatement,
+    AST_LabelRef,
+    AST_Lambda,
+    AST_LoopControl,
+    AST_NameMapping,
+    AST_Node,
+    AST_Scope,
+    AST_Sequence,
+    AST_String,
+    AST_Sub,
+    AST_Switch,
+    AST_SwitchBranch,
+    AST_Symbol,
+    AST_SymbolBlockDeclaration,
+    AST_SymbolCatch,
+    AST_SymbolClass,
+    AST_SymbolConst,
+    AST_SymbolDefClass,
+    AST_SymbolDefun,
+    AST_SymbolExport,
+    AST_SymbolFunarg,
+    AST_SymbolImport,
+    AST_SymbolLambda,
+    AST_SymbolLet,
+    AST_SymbolMethod,
+    AST_SymbolRef,
+    AST_SymbolUsing,
+    AST_SymbolVar,
+    AST_Toplevel,
+    AST_VarDef,
+    AST_With,
+    TreeWalker,
+    walk,
+    walk_abort
+} from "./ast.js";
+import {
+    ALL_RESERVED_WORDS,
+    js_error,
+} from "./parse.js";
+
+const MASK_EXPORT_DONT_MANGLE = 1 << 0;
+const MASK_EXPORT_WANT_MANGLE = 1 << 1;
+
+let function_defs = null;
+let unmangleable_names = null;
+/**
+ * When defined, there is a function declaration somewhere that's inside of a block.
+ * See https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-block-level-function-declarations-web-legacy-compatibility-semantics
+*/
+let scopes_with_block_defuns = null;
+
+class SymbolDef {
+    constructor(scope, orig, init) {
+        this.name = orig.name;
+        this.orig = [ orig ];
+        this.init = init;
+        this.eliminated = 0;
+        this.assignments = 0;
+        this.scope = scope;
+        this.replaced = 0;
+        this.global = false;
+        this.export = 0;
+        this.mangled_name = null;
+        this.undeclared = false;
+        this.id = SymbolDef.next_id++;
+        this.chained = false;
+        this.direct_access = false;
+        this.escaped = 0;
+        this.recursive_refs = 0;
+        this.references = [];
+        this.should_replace = undefined;
+        this.single_use = false;
+        this.fixed = false;
+        Object.seal(this);
+    }
+    fixed_value() {
+        if (!this.fixed || this.fixed instanceof AST_Node) return this.fixed;
+        return this.fixed();
+    }
+    unmangleable(options) {
+        if (!options) options = {};
+
+        if (
+            function_defs &&
+            function_defs.has(this.id) &&
+            keep_name(options.keep_fnames, this.orig[0].name)
+        ) return true;
+
+        return this.global && !options.toplevel
+            || (this.export & MASK_EXPORT_DONT_MANGLE)
+            || this.undeclared
+            || !options.eval && this.scope.pinned()
+            || (this.orig[0] instanceof AST_SymbolLambda
+                  || this.orig[0] instanceof AST_SymbolDefun) && keep_name(options.keep_fnames, this.orig[0].name)
+            || this.orig[0] instanceof AST_SymbolMethod
+            || (this.orig[0] instanceof AST_SymbolClass
+                  || this.orig[0] instanceof AST_SymbolDefClass) && keep_name(options.keep_classnames, this.orig[0].name);
+    }
+    mangle(options) {
+        const cache = options.cache && options.cache.props;
+        if (this.global && cache && cache.has(this.name)) {
+            this.mangled_name = cache.get(this.name);
+        } else if (!this.mangled_name && !this.unmangleable(options)) {
+            var s = this.scope;
+            var sym = this.orig[0];
+            if (options.ie8 && sym instanceof AST_SymbolLambda)
+                s = s.parent_scope;
+            const redefinition = redefined_catch_def(this);
+            this.mangled_name = redefinition
+                ? redefinition.mangled_name || redefinition.name
+                : s.next_mangled(options, this);
+            if (this.global && cache) {
+                cache.set(this.name, this.mangled_name);
+            }
+        }
+    }
+}
+
+SymbolDef.next_id = 1;
+
+function redefined_catch_def(def) {
+    if (def.orig[0] instanceof AST_SymbolCatch
+        && def.scope.is_block_scope()
+    ) {
+        return def.scope.get_defun_scope().variables.get(def.name);
+    }
+}
+
+AST_Scope.DEFMETHOD("figure_out_scope", function(options, { parent_scope = undefined, toplevel = this } = {}) {
+    options = defaults(options, {
+        cache: null,
+        ie8: false,
+        safari10: false,
+        module: false,
+    });
+
+    if (!(toplevel instanceof AST_Toplevel)) {
+        throw new Error("Invalid toplevel scope");
+    }
+
+    // pass 1: setup scope chaining and handle definitions
+    var scope = this.parent_scope = parent_scope;
+    var labels = new Map();
+    var defun = null;
+    var in_destructuring = null;
+    var for_scopes = [];
+    var tw = new TreeWalker((node, descend) => {
+        if (node.is_block_scope()) {
+            const save_scope = scope;
+            node.block_scope = scope = new AST_Scope(node);
+            scope._block_scope = true;
+            scope.init_scope_vars(save_scope);
+            scope.uses_with = save_scope.uses_with;
+            scope.uses_eval = save_scope.uses_eval;
+
+            if (options.safari10) {
+                if (node instanceof AST_For || node instanceof AST_ForIn || node instanceof AST_ForOf) {
+                    for_scopes.push(scope);
+                }
+            }
+
+            if (node instanceof AST_Switch) {
+                // XXX: HACK! Ensure the switch expression gets the correct scope (the parent scope) and the body gets the contained scope
+                // AST_Switch has a scope within the body, but it itself "is a block scope"
+                // This means the switched expression has to belong to the outer scope
+                // while the body inside belongs to the switch itself.
+                // This is pretty nasty and warrants an AST change
+                const the_block_scope = scope;
+                scope = save_scope;
+                node.expression.walk(tw);
+                scope = the_block_scope;
+                for (let i = 0; i < node.body.length; i++) {
+                    node.body[i].walk(tw);
+                }
+            } else {
+                descend();
+            }
+            scope = save_scope;
+            return true;
+        }
+        if (node instanceof AST_Destructuring) {
+            const save_destructuring = in_destructuring;
+            in_destructuring = node;
+            descend();
+            in_destructuring = save_destructuring;
+            return true;
+        }
+        if (node instanceof AST_Scope) {
+            node.init_scope_vars(scope);
+            var save_scope = scope;
+            var save_defun = defun;
+            var save_labels = labels;
+            defun = scope = node;
+            labels = new Map();
+            descend();
+            scope = save_scope;
+            defun = save_defun;
+            labels = save_labels;
+            return true;        // don't descend again in TreeWalker
+        }
+        if (node instanceof AST_LabeledStatement) {
+            var l = node.label;
+            if (labels.has(l.name)) {
+                throw new Error(string_template("Label {name} defined twice", l));
+            }
+            labels.set(l.name, l);
+            descend();
+            labels.delete(l.name);
+            return true;        // no descend again
+        }
+        if (node instanceof AST_With) {
+            for (var s = scope; s; s = s.parent_scope)
+                s.uses_with = true;
+            return;
+        }
+        if (node instanceof AST_Symbol) {
+            node.scope = scope;
+        }
+        if (node instanceof AST_Label) {
+            node.thedef = node;
+            node.references = [];
+        }
+        if (node instanceof AST_SymbolLambda) {
+            defun.def_function(node, node.name == "arguments" ? undefined : defun);
+        } else if (node instanceof AST_SymbolDefun) {
+            // Careful here, the scope where this should be defined is
+            // the parent scope.  The reason is that we enter a new
+            // scope when we encounter the AST_Defun node (which is
+            // instanceof AST_Scope) but we get to the symbol a bit
+            // later.
+            const closest_scope = defun.parent_scope;
+
+            // In strict mode, function definitions are block-scoped
+            node.scope = tw.directives["use strict"]
+                ? closest_scope
+                : closest_scope.get_defun_scope();
+
+            mark_export(node.scope.def_function(node, defun), 1);
+        } else if (node instanceof AST_SymbolClass) {
+            mark_export(defun.def_variable(node, defun), 1);
+        } else if (node instanceof AST_SymbolImport) {
+            scope.def_variable(node);
+        } else if (node instanceof AST_SymbolDefClass) {
+            // This deals with the name of the class being available
+            // inside the class.
+            mark_export((node.scope = defun.parent_scope).def_function(node, defun), 1);
+        } else if (
+            node instanceof AST_SymbolVar
+            || node instanceof AST_SymbolLet
+            || node instanceof AST_SymbolConst
+            || node instanceof AST_SymbolUsing
+            || node instanceof AST_SymbolCatch
+        ) {
+            var def;
+            if (node instanceof AST_SymbolBlockDeclaration) {
+                def = scope.def_variable(node, null);
+            } else {
+                def = defun.def_variable(node, node.TYPE == "SymbolVar" ? null : undefined);
+            }
+            if (!def.orig.every((sym) => {
+                if (sym === node) return true;
+                if (node instanceof AST_SymbolBlockDeclaration) {
+                    return sym instanceof AST_SymbolLambda;
+                }
+                return !(sym instanceof AST_SymbolLet || sym instanceof AST_SymbolConst || sym instanceof AST_SymbolUsing);
+            })) {
+                js_error(
+                    `"${node.name}" is redeclared`,
+                    node.start.file,
+                    node.start.line,
+                    node.start.col,
+                    node.start.pos
+                );
+            }
+            if (!(node instanceof AST_SymbolFunarg)) mark_export(def, 2);
+            if (defun !== scope) {
+                node.mark_enclosed();
+                var def = scope.find_variable(node);
+                if (node.thedef !== def) {
+                    node.thedef = def;
+                    node.reference();
+                }
+            }
+        } else if (node instanceof AST_LabelRef) {
+            var sym = labels.get(node.name);
+            if (!sym) throw new Error(string_template("Undefined label {name} [{line},{col}]", {
+                name: node.name,
+                line: node.start.line,
+                col: node.start.col
+            }));
+            node.thedef = sym;
+        }
+        if (!(scope instanceof AST_Toplevel) && (node instanceof AST_Export || node instanceof AST_Import)) {
+            js_error(
+                `"${node.TYPE}" statement may only appear at the top level`,
+                node.start.file,
+                node.start.line,
+                node.start.col,
+                node.start.pos
+            );
+        }
+    });
+
+    if (options.module) {
+        tw.directives["use strict"] = true;
+    }
+
+    this.walk(tw);
+
+    function mark_export(def, level) {
+        if (in_destructuring) {
+            var i = 0;
+            do {
+                level++;
+            } while (tw.parent(i++) !== in_destructuring);
+        }
+        var node = tw.parent(level);
+        if (def.export = node instanceof AST_Export ? MASK_EXPORT_DONT_MANGLE : 0) {
+            var exported = node.exported_definition;
+            if ((exported instanceof AST_Defun || exported instanceof AST_DefClass) && node.is_default) {
+                def.export = MASK_EXPORT_WANT_MANGLE;
+            }
+        }
+    }
+
+    // pass 2: find back references and eval
+    const is_toplevel = this instanceof AST_Toplevel;
+    if (is_toplevel) {
+        this.globals = new Map();
+    }
+
+    var tw = new TreeWalker(node => {
+        if (node instanceof AST_LoopControl && node.label) {
+            node.label.thedef.references.push(node);
+            return true;
+        }
+        if (node instanceof AST_SymbolRef) {
+            var name = node.name;
+            if (name == "eval" && tw.parent() instanceof AST_Call) {
+                for (var s = node.scope; s && !s.uses_eval; s = s.parent_scope) {
+                    s.uses_eval = true;
+                }
+            }
+            var sym;
+            if (tw.parent() instanceof AST_NameMapping && tw.parent(1).module_name
+                || !(sym = node.scope.find_variable(name))) {
+
+                sym = toplevel.def_global(node);
+                if (node instanceof AST_SymbolExport) sym.export = MASK_EXPORT_DONT_MANGLE;
+            } else if (sym.scope instanceof AST_Lambda && name == "arguments") {
+                sym.scope.get_defun_scope().uses_arguments = true;
+            }
+            node.thedef = sym;
+            node.reference();
+            if (node.scope.is_block_scope()
+                && !(sym.orig[0] instanceof AST_SymbolBlockDeclaration)) {
+                node.scope = node.scope.get_defun_scope();
+            }
+            return true;
+        }
+        // ensure mangling works if catch reuses a scope variable
+        var def;
+        if (node instanceof AST_SymbolCatch && (def = redefined_catch_def(node.definition()))) {
+            var s = node.scope;
+            while (s) {
+                push_uniq(s.enclosed, def);
+                if (s === def.scope) break;
+                s = s.parent_scope;
+            }
+        }
+    });
+    this.walk(tw);
+
+    // pass 3: work around IE8 and Safari catch scope bugs
+    if (options.ie8 || options.safari10) {
+        walk(this, node => {
+            if (node instanceof AST_SymbolCatch) {
+                var name = node.name;
+                var refs = node.thedef.references;
+                var scope = node.scope.get_defun_scope();
+                var def = scope.find_variable(name)
+                    || toplevel.globals.get(name)
+                    || scope.def_variable(node);
+                refs.forEach(function(ref) {
+                    ref.thedef = def;
+                    ref.reference();
+                });
+                node.thedef = def;
+                node.reference();
+                return true;
+            }
+        });
+    }
+
+    // pass 4: add symbol definitions to loop scopes
+    // Safari/Webkit bug workaround - loop init let variable shadowing argument.
+    // https://github.com/mishoo/UglifyJS2/issues/1753
+    // https://bugs.webkit.org/show_bug.cgi?id=171041
+    if (options.safari10) {
+        for (const scope of for_scopes) {
+            scope.parent_scope.variables.forEach(function(def) {
+                push_uniq(scope.enclosed, def);
+            });
+        }
+    }
+});
+
+AST_Toplevel.DEFMETHOD("def_global", function(node) {
+    var globals = this.globals, name = node.name;
+    if (globals.has(name)) {
+        return globals.get(name);
+    } else {
+        var g = new SymbolDef(this, node);
+        g.undeclared = true;
+        g.global = true;
+        globals.set(name, g);
+        return g;
+    }
+});
+
+AST_Scope.DEFMETHOD("init_scope_vars", function(parent_scope) {
+    this.variables = new Map();         // map name to AST_SymbolVar (variables defined in this scope; includes functions)
+    this.uses_with = false;             // will be set to true if this or some nested scope uses the `with` statement
+    this.uses_eval = false;             // will be set to true if this or nested scope uses the global `eval`
+    this.parent_scope = parent_scope;   // the parent scope
+    this.enclosed = [];                 // a list of variables from this or outer scope(s) that are referenced from this or inner scopes
+    this.cname = -1;                    // the current index for mangling functions/variables
+});
+
+AST_Scope.DEFMETHOD("conflicting_def", function (name) {
+    return (
+        this.enclosed.find(def => def.name === name)
+        || this.variables.has(name)
+        || (this.parent_scope && this.parent_scope.conflicting_def(name))
+    );
+});
+
+AST_Scope.DEFMETHOD("conflicting_def_shallow", function (name) {
+    return (
+        this.enclosed.find(def => def.name === name)
+        || this.variables.has(name)
+    );
+});
+
+AST_Scope.DEFMETHOD("add_child_scope", function (scope) {
+    // `scope` is going to be moved into `this` right now.
+    // Update the required scopes' information
+
+    if (scope.parent_scope === this) return;
+
+    scope.parent_scope = this;
+
+    // Propagate to this.uses_arguments from arrow functions
+    if ((scope instanceof AST_Arrow) && (this instanceof AST_Lambda && !this.uses_arguments)) {
+        this.uses_arguments = walk(scope, node => {
+            if (
+                node instanceof AST_SymbolRef
+                && node.scope instanceof AST_Lambda
+                && node.name === "arguments"
+            ) {
+                return walk_abort;
+            }
+
+            if (node instanceof AST_Lambda && !(node instanceof AST_Arrow)) {
+                return true;
+            }
+        });
+    }
+
+    this.uses_with = this.uses_with || scope.uses_with;
+    this.uses_eval = this.uses_eval || scope.uses_eval;
+
+    const scope_ancestry = (() => {
+        const ancestry = [];
+        let cur = this;
+        do {
+            ancestry.push(cur);
+        } while ((cur = cur.parent_scope));
+        ancestry.reverse();
+        return ancestry;
+    })();
+
+    const new_scope_enclosed_set = new Set(scope.enclosed);
+    const to_enclose = [];
+    for (const scope_topdown of scope_ancestry) {
+        to_enclose.forEach(e => push_uniq(scope_topdown.enclosed, e));
+        for (const def of scope_topdown.variables.values()) {
+            if (new_scope_enclosed_set.has(def)) {
+                push_uniq(to_enclose, def);
+                push_uniq(scope_topdown.enclosed, def);
+            }
+        }
+    }
+});
+
+function find_scopes_visible_from(scopes) {
+    const found_scopes = new Set();
+
+    for (const scope of new Set(scopes)) {
+        (function bubble_up(scope) {
+            if (scope == null || found_scopes.has(scope)) return;
+
+            found_scopes.add(scope);
+
+            bubble_up(scope.parent_scope);
+        })(scope);
+    }
+
+    return [...found_scopes];
+}
+
+// Creates a symbol during compression
+AST_Scope.DEFMETHOD("create_symbol", function(SymClass, {
+    source,
+    tentative_name,
+    scope,
+    conflict_scopes = [scope],
+    init = null
+} = {}) {
+    let symbol_name;
+
+    conflict_scopes = find_scopes_visible_from(conflict_scopes);
+
+    if (tentative_name) {
+        // Implement hygiene (no new names are conflicting with existing names)
+        tentative_name =
+            symbol_name =
+            tentative_name.replace(/(?:^[^a-z_$]|[^a-z0-9_$])/ig, "_");
+
+        let i = 0;
+        while (conflict_scopes.find(s => s.conflicting_def_shallow(symbol_name))) {
+            symbol_name = tentative_name + "$" + i++;
+        }
+    }
+
+    if (!symbol_name) {
+        throw new Error("No symbol name could be generated in create_symbol()");
+    }
+
+    const symbol = make_node(SymClass, source, {
+        name: symbol_name,
+        scope
+    });
+
+    this.def_variable(symbol, init || null);
+
+    symbol.mark_enclosed();
+
+    return symbol;
+});
+
+
+AST_Node.DEFMETHOD("is_block_scope", return_false);
+AST_Class.DEFMETHOD("is_block_scope", return_false);
+AST_Lambda.DEFMETHOD("is_block_scope", return_false);
+AST_Toplevel.DEFMETHOD("is_block_scope", return_false);
+AST_SwitchBranch.DEFMETHOD("is_block_scope", return_false);
+AST_Block.DEFMETHOD("is_block_scope", return_true);
+AST_Scope.DEFMETHOD("is_block_scope", function () {
+    return this._block_scope || false;
+});
+AST_IterationStatement.DEFMETHOD("is_block_scope", return_true);
+
+AST_Lambda.DEFMETHOD("init_scope_vars", function() {
+    AST_Scope.prototype.init_scope_vars.apply(this, arguments);
+    this.uses_arguments = false;
+    this.def_variable(new AST_SymbolFunarg({
+        name: "arguments",
+        start: this.start,
+        end: this.end
+    }));
+});
+
+AST_Arrow.DEFMETHOD("init_scope_vars", function() {
+    AST_Scope.prototype.init_scope_vars.apply(this, arguments);
+    this.uses_arguments = false;
+});
+
+AST_Symbol.DEFMETHOD("mark_enclosed", function() {
+    var def = this.definition();
+    var s = this.scope;
+    while (s) {
+        push_uniq(s.enclosed, def);
+        if (s === def.scope) break;
+        s = s.parent_scope;
+    }
+});
+
+AST_Symbol.DEFMETHOD("reference", function() {
+    this.definition().references.push(this);
+    this.mark_enclosed();
+});
+
+AST_Scope.DEFMETHOD("find_variable", function(name) {
+    if (name instanceof AST_Symbol) name = name.name;
+    return this.variables.get(name)
+        || (this.parent_scope && this.parent_scope.find_variable(name));
+});
+
+AST_Scope.DEFMETHOD("def_function", function(symbol, init) {
+    var def = this.def_variable(symbol, init);
+    if (!def.init || def.init instanceof AST_Defun) def.init = init;
+    return def;
+});
+
+AST_Scope.DEFMETHOD("def_variable", function(symbol, init) {
+    var def = this.variables.get(symbol.name);
+    if (def) {
+        def.orig.push(symbol);
+        if (def.init && (def.scope !== symbol.scope || def.init instanceof AST_Function)) {
+            def.init = init;
+        }
+    } else {
+        def = new SymbolDef(this, symbol, init);
+        this.variables.set(symbol.name, def);
+        def.global = !this.parent_scope;
+    }
+    return symbol.thedef = def;
+});
+
+function next_mangled(scope, options) {
+    let defun_scope;
+    if (
+        scopes_with_block_defuns
+        && (defun_scope = scope.get_defun_scope())
+        && scopes_with_block_defuns.has(defun_scope)
+    ) {
+        scope = defun_scope;
+    }
+
+    var ext = scope.enclosed;
+    var nth_identifier = options.nth_identifier;
+    out: while (true) {
+        var m = nth_identifier.get(++scope.cname);
+        if (ALL_RESERVED_WORDS.has(m)) continue; // skip over "do"
+
+        // https://github.com/mishoo/UglifyJS2/issues/242 -- do not
+        // shadow a name reserved from mangling.
+        if (options.reserved.has(m)) continue;
+
+        // Functions with short names might collide with base54 output
+        // and therefore cause collisions when keep_fnames is true.
+        if (unmangleable_names && unmangleable_names.has(m)) continue out;
+
+        // we must ensure that the mangled name does not shadow a name
+        // from some parent scope that is referenced in this or in
+        // inner scopes.
+        for (let i = ext.length; --i >= 0;) {
+            const def = ext[i];
+            const name = def.mangled_name || (def.unmangleable(options) && def.name);
+            if (m == name) continue out;
+        }
+        return m;
+    }
+}
+
+AST_Scope.DEFMETHOD("next_mangled", function(options) {
+    return next_mangled(this, options);
+});
+
+AST_Toplevel.DEFMETHOD("next_mangled", function(options) {
+    let name;
+    const mangled_names = this.mangled_names;
+    do {
+        name = next_mangled(this, options);
+    } while (mangled_names.has(name));
+    return name;
+});
+
+AST_Function.DEFMETHOD("next_mangled", function(options, def) {
+    // #179, #326
+    // in Safari strict mode, something like (function x(x){...}) is a syntax error;
+    // a function expression's argument cannot shadow the function expression's name
+
+    var tricky_def = def.orig[0] instanceof AST_SymbolFunarg && this.name && this.name.definition();
+
+    // the function's mangled_name is null when keep_fnames is true
+    var tricky_name = tricky_def ? tricky_def.mangled_name || tricky_def.name : null;
+
+    while (true) {
+        var name = next_mangled(this, options);
+        if (!tricky_name || tricky_name != name)
+            return name;
+    }
+});
+
+AST_Symbol.DEFMETHOD("unmangleable", function(options) {
+    var def = this.definition();
+    return !def || def.unmangleable(options);
+});
+
+// labels are always mangleable
+AST_Label.DEFMETHOD("unmangleable", return_false);
+
+AST_Symbol.DEFMETHOD("unreferenced", function() {
+    return !this.definition().references.length && !this.scope.pinned();
+});
+
+AST_Symbol.DEFMETHOD("definition", function() {
+    return this.thedef;
+});
+
+AST_Symbol.DEFMETHOD("global", function() {
+    return this.thedef.global;
+});
+
+/**
+ * Format the mangler options (if any) into their appropriate types
+ */
+export function format_mangler_options(options) {
+    options = defaults(options, {
+        eval        : false,
+        nth_identifier : base54,
+        ie8         : false,
+        keep_classnames: false,
+        keep_fnames : false,
+        module      : false,
+        reserved    : [],
+        toplevel    : false,
+    });
+    if (options.module) options.toplevel = true;
+    if (!Array.isArray(options.reserved)
+        && !(options.reserved instanceof Set)
+    ) {
+        options.reserved = [];
+    }
+    options.reserved = new Set(options.reserved);
+    // Never mangle arguments
+    options.reserved.add("arguments");
+    return options;
+}
+
+AST_Toplevel.DEFMETHOD("mangle_names", function(options) {
+    options = format_mangler_options(options);
+    var nth_identifier = options.nth_identifier;
+
+    // We only need to mangle declaration nodes.  Special logic wired
+    // into the code generator will display the mangled name if it's
+    // present (and for AST_SymbolRef-s it'll use the mangled name of
+    // the AST_SymbolDeclaration that it points to).
+    var lname = -1;
+    var to_mangle = [];
+
+    if (options.keep_fnames) {
+        function_defs = new Set();
+    }
+
+    const mangled_names = this.mangled_names = new Set();
+    unmangleable_names = new Set();
+
+    if (options.cache) {
+        this.globals.forEach(collect);
+        if (options.cache.props) {
+            options.cache.props.forEach(function(mangled_name) {
+                mangled_names.add(mangled_name);
+            });
+        }
+    }
+
+    var tw = new TreeWalker(function(node, descend) {
+        if (node instanceof AST_LabeledStatement) {
+            // lname is incremented when we get to the AST_Label
+            var save_nesting = lname;
+            descend();
+            lname = save_nesting;
+            return true;        // don't descend again in TreeWalker
+        }
+        if (
+            node instanceof AST_Defun
+            && !(tw.parent() instanceof AST_Scope)
+        ) {
+            scopes_with_block_defuns = scopes_with_block_defuns || new Set();
+            scopes_with_block_defuns.add(node.parent_scope.get_defun_scope());
+        }
+        if (node instanceof AST_Scope) {
+            node.variables.forEach(collect);
+            return;
+        }
+        if (node.is_block_scope()) {
+            node.block_scope.variables.forEach(collect);
+            return;
+        }
+        if (
+            function_defs
+            && node instanceof AST_VarDef
+            && node.name instanceof AST_Symbol
+            && node.value instanceof AST_Lambda
+            && !node.value.name
+            && keep_name(options.keep_fnames, node.name.name)
+        ) {
+            function_defs.add(node.name.definition().id);
+            return;
+        }
+        if (node instanceof AST_Label) {
+            let name;
+            do {
+                name = nth_identifier.get(++lname);
+            } while (ALL_RESERVED_WORDS.has(name));
+            node.mangled_name = name;
+            return true;
+        }
+        if (!(options.ie8 || options.safari10) && node instanceof AST_SymbolCatch) {
+            to_mangle.push(node.definition());
+            return;
+        }
+    });
+
+    this.walk(tw);
+
+    if (options.keep_fnames || options.keep_classnames) {
+        // Collect a set of short names which are unmangleable,
+        // for use in avoiding collisions in next_mangled.
+        to_mangle.forEach(def => {
+            if (def.name.length < 6 && def.unmangleable(options)) {
+                unmangleable_names.add(def.name);
+            }
+        });
+    }
+
+    to_mangle.forEach(def => { def.mangle(options); });
+
+    function_defs = null;
+    unmangleable_names = null;
+    scopes_with_block_defuns = null;
+
+    function collect(symbol) {
+        if (symbol.export & MASK_EXPORT_DONT_MANGLE) {
+            unmangleable_names.add(symbol.name);
+        } else if (!options.reserved.has(symbol.name)) {
+            to_mangle.push(symbol);
+        }
+    }
+});
+
+AST_Toplevel.DEFMETHOD("find_colliding_names", function(options) {
+    const cache = options.cache && options.cache.props;
+    const avoid = new Set();
+    options.reserved.forEach(to_avoid);
+    this.globals.forEach(add_def);
+    this.walk(new TreeWalker(function(node) {
+        if (node instanceof AST_Scope) node.variables.forEach(add_def);
+        if (node instanceof AST_SymbolCatch) add_def(node.definition());
+    }));
+    return avoid;
+
+    function to_avoid(name) {
+        avoid.add(name);
+    }
+
+    function add_def(def) {
+        var name = def.name;
+        if (def.global && cache && cache.has(name)) name = cache.get(name);
+        else if (!def.unmangleable(options)) return;
+        to_avoid(name);
+    }
+});
+
+AST_Toplevel.DEFMETHOD("expand_names", function(options) {
+    options = format_mangler_options(options);
+    var nth_identifier = options.nth_identifier;
+    if (nth_identifier.reset && nth_identifier.sort) {
+        nth_identifier.reset();
+        nth_identifier.sort();
+    }
+    var avoid = this.find_colliding_names(options);
+    var cname = 0;
+    this.globals.forEach(rename);
+    this.walk(new TreeWalker(function(node) {
+        if (node instanceof AST_Scope) node.variables.forEach(rename);
+        if (node instanceof AST_SymbolCatch) rename(node.definition());
+    }));
+
+    function next_name() {
+        var name;
+        do {
+            name = nth_identifier.get(cname++);
+        } while (avoid.has(name) || ALL_RESERVED_WORDS.has(name));
+        return name;
+    }
+
+    function rename(def) {
+        if (def.global && options.cache) return;
+        if (def.unmangleable(options)) return;
+        if (options.reserved.has(def.name)) return;
+        const redefinition = redefined_catch_def(def);
+        const name = def.name = redefinition ? redefinition.name : next_name();
+        def.orig.forEach(function(sym) {
+            sym.name = name;
+        });
+        def.references.forEach(function(sym) {
+            sym.name = name;
+        });
+    }
+});
+
+AST_Node.DEFMETHOD("tail_node", return_this);
+AST_Sequence.DEFMETHOD("tail_node", function() {
+    return this.expressions[this.expressions.length - 1];
+});
+
+AST_Toplevel.DEFMETHOD("compute_char_frequency", function(options) {
+    options = format_mangler_options(options);
+    var nth_identifier = options.nth_identifier;
+    if (!nth_identifier.reset || !nth_identifier.consider || !nth_identifier.sort) {
+        // If the identifier mangler is invariant, skip computing character frequency.
+        return;
+    }
+    nth_identifier.reset();
+
+    try {
+        AST_Node.prototype.print = function(stream, force_parens) {
+            this._print(stream, force_parens);
+            if (this instanceof AST_Symbol && !this.unmangleable(options)) {
+                nth_identifier.consider(this.name, -1);
+            } else if (options.properties) {
+                if (this instanceof AST_DotHash) {
+                    nth_identifier.consider("#" + this.property, -1);
+                } else if (this instanceof AST_Dot) {
+                    nth_identifier.consider(this.property, -1);
+                } else if (this instanceof AST_Sub) {
+                    skip_string(this.property);
+                }
+            }
+        };
+        nth_identifier.consider(this.print_to_string(), 1);
+    } finally {
+        AST_Node.prototype.print = AST_Node.prototype._print;
+    }
+    nth_identifier.sort();
+
+    function skip_string(node) {
+        if (node instanceof AST_String) {
+            nth_identifier.consider(node.value, -1);
+        } else if (node instanceof AST_Conditional) {
+            skip_string(node.consequent);
+            skip_string(node.alternative);
+        } else if (node instanceof AST_Sequence) {
+            skip_string(node.tail_node());
+        }
+    }
+});
+
+const base54 = (() => {
+    const leading = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$_".split("");
+    const digits = "0123456789".split("");
+    let chars;
+    let frequency;
+    function reset() {
+        frequency = new Map();
+        leading.forEach(function(ch) {
+            frequency.set(ch, 0);
+        });
+        digits.forEach(function(ch) {
+            frequency.set(ch, 0);
+        });
+    }
+    function consider(str, delta) {
+        for (var i = str.length; --i >= 0;) {
+            frequency.set(str[i], frequency.get(str[i]) + delta);
+        }
+    }
+    function compare(a, b) {
+        return frequency.get(b) - frequency.get(a);
+    }
+    function sort() {
+        chars = mergeSort(leading, compare).concat(mergeSort(digits, compare));
+    }
+    // Ensure this is in a usable initial state.
+    reset();
+    sort();
+    function base54(num) {
+        var ret = "", base = 54;
+        num++;
+        do {
+            num--;
+            ret += chars[num % base];
+            num = Math.floor(num / base);
+            base = 64;
+        } while (num > 0);
+        return ret;
+    }
+
+    return {
+        get: base54,
+        consider,
+        reset,
+        sort
+    };
+})();
+
+export {
+    base54,
+    SymbolDef,
+};
Index: frontend/node_modules/terser/lib/size.js
===================================================================
--- frontend/node_modules/terser/lib/size.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/size.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,511 @@
+import {
+    AST_Accessor,
+    AST_Array,
+    AST_Arrow,
+    AST_Await,
+    AST_BigInt,
+    AST_Binary,
+    AST_Block,
+    AST_Break,
+    AST_Call,
+    AST_Case,
+    AST_Class,
+    AST_ClassStaticBlock,
+    AST_ClassPrivateProperty,
+    AST_ClassProperty,
+    AST_ConciseMethod,
+    AST_Conditional,
+    AST_Const,
+    AST_Continue,
+    AST_Debugger,
+    AST_Default,
+    AST_Defun,
+    AST_Destructuring,
+    AST_Directive,
+    AST_Do,
+    AST_Dot,
+    AST_DotHash,
+    AST_EmptyStatement,
+    AST_Expansion,
+    AST_Export,
+    AST_False,
+    AST_For,
+    AST_ForIn,
+    AST_Function,
+    AST_Hole,
+    AST_If,
+    AST_Import,
+    AST_DynamicImport,
+    AST_ImportMeta,
+    AST_Infinity,
+    AST_LabeledStatement,
+    AST_Let,
+    AST_NameMapping,
+    AST_NaN,
+    AST_New,
+    AST_NewTarget,
+    AST_Node,
+    AST_Null,
+    AST_Number,
+    AST_Object,
+    AST_ObjectKeyVal,
+    AST_ObjectGetter,
+    AST_ObjectSetter,
+    AST_PrivateGetter,
+    AST_PrivateMethod,
+    AST_PrivateSetter,
+    AST_PrivateIn,
+    AST_RegExp,
+    AST_Return,
+    AST_Sequence,
+    AST_String,
+    AST_Sub,
+    AST_Super,
+    AST_Switch,
+    AST_Symbol,
+    AST_SymbolClassProperty,
+    AST_SymbolExportForeign,
+    AST_SymbolImportForeign,
+    AST_SymbolRef,
+    AST_SymbolDeclaration,
+    AST_TemplateSegment,
+    AST_TemplateString,
+    AST_This,
+    AST_Throw,
+    AST_Toplevel,
+    AST_True,
+    AST_Try,
+    AST_Catch,
+    AST_Finally,
+    AST_Unary,
+    AST_Undefined,
+    AST_Using,
+    AST_Var,
+    AST_VarDefLike,
+    AST_While,
+    AST_With,
+    AST_Yield,
+    walk_parent
+} from "./ast.js";
+import { first_in_statement } from "./utils/first_in_statement.js";
+
+let mangle_options = undefined;
+AST_Node.prototype.size = function (compressor, stack) {
+    mangle_options = compressor && compressor._mangle_options;
+
+    let size = 0;
+    walk_parent(this, (node, info) => {
+        size += node._size(info);
+
+        // Braceless arrow functions have fake "return" statements
+        if (node instanceof AST_Arrow && node.is_braceless()) {
+            size += node.body[0].value._size(info);
+            return true;
+        }
+    }, stack || (compressor && compressor.stack));
+
+    // just to save a bit of memory
+    mangle_options = undefined;
+
+    return size;
+};
+
+AST_Node.prototype._size = () => 0;
+
+AST_Debugger.prototype._size = () => 8;
+
+AST_Directive.prototype._size = function () {
+    // TODO string encoding stuff
+    return 2 + this.value.length;
+};
+
+/** Count commas/semicolons necessary to show a list of expressions/statements */
+const list_overhead = (array) => array.length && array.length - 1;
+
+AST_Block.prototype._size = function () {
+    return 2 + list_overhead(this.body);
+};
+
+AST_Toplevel.prototype._size = function() {
+    return list_overhead(this.body);
+};
+
+AST_EmptyStatement.prototype._size = () => 1;
+
+AST_LabeledStatement.prototype._size = () => 2;  // x:
+
+AST_Do.prototype._size = () => 9;
+
+AST_While.prototype._size = () => 7;
+
+AST_For.prototype._size = () => 8;
+
+AST_ForIn.prototype._size = () => 8;
+// AST_ForOf inherits ^
+
+AST_With.prototype._size = () => 6;
+
+AST_Expansion.prototype._size = () => 3;
+
+const lambda_modifiers = func =>
+    (func.is_generator ? 1 : 0) + (func.async ? 6 : 0);
+
+AST_Accessor.prototype._size = function () {
+    return lambda_modifiers(this) + 4 + list_overhead(this.argnames) + list_overhead(this.body);
+};
+
+AST_Function.prototype._size = function (info) {
+    const first = !!first_in_statement(info);
+    return (first * 2) + lambda_modifiers(this) + 12 + list_overhead(this.argnames) + list_overhead(this.body);
+};
+
+AST_Defun.prototype._size = function () {
+    return lambda_modifiers(this) + 13 + list_overhead(this.argnames) + list_overhead(this.body);
+};
+
+AST_Arrow.prototype._size = function () {
+    let args_and_arrow = 2 + list_overhead(this.argnames);
+
+    if (
+        !(
+            this.argnames.length === 1
+            && this.argnames[0] instanceof AST_Symbol
+        )
+    ) {
+        args_and_arrow += 2; // parens around the args
+    }
+
+    const body_overhead = this.is_braceless() ? 0 : list_overhead(this.body) + 2;
+
+    return lambda_modifiers(this) + args_and_arrow + body_overhead;
+};
+
+AST_Destructuring.prototype._size = () => 2;
+
+AST_TemplateString.prototype._size = function () {
+    return 2 + (Math.floor(this.segments.length / 2) * 3);  /* "${}" */
+};
+
+AST_TemplateSegment.prototype._size = function () {
+    return this.value.length;
+};
+
+AST_Return.prototype._size = function () {
+    return this.value ? 7 : 6;
+};
+
+AST_Throw.prototype._size = () => 6;
+
+AST_Break.prototype._size = function () {
+    return this.label ? 6 : 5;
+};
+
+AST_Continue.prototype._size = function () {
+    return this.label ? 9 : 8;
+};
+
+AST_If.prototype._size = () => 4;
+
+AST_Switch.prototype._size = function () {
+    return 8 + list_overhead(this.body);
+};
+
+AST_Case.prototype._size = function () {
+    return 5 + list_overhead(this.body);
+};
+
+AST_Default.prototype._size = function () {
+    return 8 + list_overhead(this.body);
+};
+
+AST_Try.prototype._size = () => 3;
+
+AST_Catch.prototype._size = function () {
+    let size = 7 + list_overhead(this.body);
+    if (this.argname) {
+        size += 2;
+    }
+    return size;
+};
+
+AST_Finally.prototype._size = function () {
+    return 7 + list_overhead(this.body);
+};
+
+AST_Var.prototype._size = function () {
+    return 4 + list_overhead(this.definitions);
+};
+
+AST_Let.prototype._size = function () {
+    return 4 + list_overhead(this.definitions);
+};
+
+AST_Const.prototype._size = function () {
+    return 6 + list_overhead(this.definitions);
+};
+
+AST_Using.prototype._size = function () {
+    const await_size = this.await ? 6 : 0;
+    return await_size + 6 + list_overhead(this.definitions);
+};
+
+AST_VarDefLike.prototype._size = function () {
+    return this.value ? 1 : 0;
+};
+
+AST_NameMapping.prototype._size = function () {
+    // foreign name isn't mangled
+    return this.name ? 4 : 0;
+};
+
+AST_Import.prototype._size = function () {
+    // import
+    let size = 6;
+
+    if (this.imported_name) size += 1;
+
+    // from
+    if (this.imported_name || this.imported_names) size += 5;
+
+    // braces, and the commas
+    if (this.imported_names) {
+        size += 2 + list_overhead(this.imported_names);
+    }
+
+    return size;
+};
+
+AST_ImportMeta.prototype._size = () => 11;
+
+AST_DynamicImport.prototype._size = function () {
+    // `import.` + phase + `()` + arg overhead
+    return 9 + this.phase.length + list_overhead(this.args);
+};
+
+AST_Export.prototype._size = function () {
+    let size = 7 + (this.is_default ? 8 : 0);
+
+    if (this.exported_value) {
+        size += this.exported_value._size();
+    }
+
+    if (this.exported_names) {
+        // Braces and commas
+        size += 2 + list_overhead(this.exported_names);
+    }
+
+    if (this.module_name) {
+        // "from "
+        size += 5;
+    }
+
+    return size;
+};
+
+AST_Call.prototype._size = function () {
+    if (this.optional) {
+        return 4 + list_overhead(this.args);
+    }
+    return 2 + list_overhead(this.args);
+};
+
+AST_New.prototype._size = function () {
+    return 6 + list_overhead(this.args);
+};
+
+AST_Sequence.prototype._size = function () {
+    return list_overhead(this.expressions);
+};
+
+AST_Dot.prototype._size = function () {
+    if (this.optional) {
+        return this.property.length + 2;
+    }
+    return this.property.length + 1;
+};
+
+AST_DotHash.prototype._size = function () {
+    if (this.optional) {
+        return this.property.length + 3;
+    }
+    return this.property.length + 2;
+};
+
+AST_Sub.prototype._size = function () {
+    return this.optional ? 4 : 2;
+};
+
+AST_Unary.prototype._size = function () {
+    if (this.operator === "typeof") return 7;
+    if (this.operator === "void") return 5;
+    return this.operator.length;
+};
+
+AST_Binary.prototype._size = function (info) {
+    if (this.operator === "in") return 4;
+
+    let size = this.operator.length;
+
+    if (
+        (this.operator === "+" || this.operator === "-")
+        && this.right instanceof AST_Unary && this.right.operator === this.operator
+    ) {
+        // 1+ +a > needs space between the +
+        size += 1;
+    }
+
+    if (this.needs_parens(info)) {
+        size += 2;
+    }
+
+    return size;
+};
+
+AST_Conditional.prototype._size = () => 3;
+
+AST_Array.prototype._size = function () {
+    return 2 + list_overhead(this.elements);
+};
+
+AST_Object.prototype._size = function (info) {
+    let base = 2;
+    if (first_in_statement(info)) {
+        base += 2; // parens
+    }
+    return base + list_overhead(this.properties);
+};
+
+/*#__INLINE__*/
+const key_size = key =>
+    typeof key === "string" ? key.length : 0;
+
+AST_ObjectKeyVal.prototype._size = function () {
+    return key_size(this.key) + 1;
+};
+
+/*#__INLINE__*/
+const static_size = is_static => is_static ? 7 : 0;
+
+AST_ObjectGetter.prototype._size = function () {
+    return 5 + static_size(this.static) + key_size(this.key);
+};
+
+AST_ObjectSetter.prototype._size = function () {
+    return 5 + static_size(this.static) + key_size(this.key);
+};
+
+AST_ConciseMethod.prototype._size = function () {
+    return static_size(this.static) + key_size(this.key);
+};
+
+AST_PrivateMethod.prototype._size = function () {
+    return AST_ConciseMethod.prototype._size.call(this) + 1;
+};
+
+AST_PrivateGetter.prototype._size = function () {
+    return AST_ConciseMethod.prototype._size.call(this) + 4;
+};
+
+AST_PrivateSetter.prototype._size = function () {
+    return AST_ConciseMethod.prototype._size.call(this) + 4;
+};
+
+AST_PrivateIn.prototype._size = function () {
+    return 5; // "#", and " in "
+};
+
+AST_Class.prototype._size = function () {
+    return (
+        (this.name ? 8 : 7)
+        + (this.extends ? 8 : 0)
+    );
+};
+
+AST_ClassStaticBlock.prototype._size = function () {
+    // "static{}" + semicolons
+    return 8 + list_overhead(this.body);
+};
+
+AST_ClassProperty.prototype._size = function () {
+    return (
+        static_size(this.static)
+        + (typeof this.key === "string" ? this.key.length + 2 : 0)
+        + (this.value ? 1 : 0)
+    );
+};
+
+AST_ClassPrivateProperty.prototype._size = function () {
+    return AST_ClassProperty.prototype._size.call(this) + 1;
+};
+
+AST_Symbol.prototype._size = function () {
+    if (!(mangle_options && this.thedef && !this.thedef.unmangleable(mangle_options))) {
+        return this.name.length;
+    } else {
+        return 1;
+    }
+};
+
+// TODO take propmangle into account
+AST_SymbolClassProperty.prototype._size = function () {
+    return this.name.length;
+};
+
+AST_SymbolRef.prototype._size = AST_SymbolDeclaration.prototype._size = function () {
+    if (this.name === "arguments") return 9;
+
+    return AST_Symbol.prototype._size.call(this);
+};
+
+AST_NewTarget.prototype._size = () => 10;
+
+AST_SymbolImportForeign.prototype._size = function () {
+    return this.name.length;
+};
+
+AST_SymbolExportForeign.prototype._size = function () {
+    return this.name.length;
+};
+
+AST_This.prototype._size = () => 4;
+
+AST_Super.prototype._size = () => 5;
+
+AST_String.prototype._size = function () {
+    return this.value.length + 2;
+};
+
+AST_Number.prototype._size = function () {
+    const { value } = this;
+    if (value === 0) return 1;
+    if (value > 0 && Math.floor(value) === value) {
+        return Math.floor(Math.log10(value) + 1);
+    }
+    return value.toString().length;
+};
+
+AST_BigInt.prototype._size = function () {
+    return this.value.length;
+};
+
+AST_RegExp.prototype._size = function () {
+    return this.value.toString().length;
+};
+
+AST_Null.prototype._size = () => 4;
+
+AST_NaN.prototype._size = () => 3;
+
+AST_Undefined.prototype._size = () => 6; // "void 0"
+
+AST_Hole.prototype._size = () => 0;  // comma is taken into account by list_overhead()
+
+AST_Infinity.prototype._size = () => 8;
+
+AST_True.prototype._size = () => 4;
+
+AST_False.prototype._size = () => 5;
+
+AST_Await.prototype._size = () => 6;
+
+AST_Yield.prototype._size = () => 6;
Index: frontend/node_modules/terser/lib/sourcemap.js
===================================================================
--- frontend/node_modules/terser/lib/sourcemap.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/sourcemap.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,148 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+"use strict";
+
+import {SourceMapConsumer, SourceMapGenerator} from "@jridgewell/source-map";
+import {defaults, HOP} from "./utils/index.js";
+
+// a small wrapper around source-map and @jridgewell/source-map
+function* SourceMap(options) {
+    options = defaults(options, {
+        file : null,
+        root : null,
+        orig : null,
+        files: {},
+    });
+
+    var orig_map;
+    var generator = new SourceMapGenerator({
+        file       : options.file,
+        sourceRoot : options.root
+    });
+
+    let sourcesContent = {__proto__: null};
+    let files = options.files;
+    for (var name in files) if (HOP(files, name)) {
+        sourcesContent[name] = files[name];
+    }
+    if (options.orig) {
+        // We support both @jridgewell/source-map (which has a sync
+        // SourceMapConsumer) and source-map (which has an async
+        // SourceMapConsumer).
+        orig_map = yield new SourceMapConsumer(options.orig);
+        if (orig_map.sourcesContent) {
+            orig_map.sources.forEach(function(source, i) {
+                var content = orig_map.sourcesContent[i];
+                if (content) {
+                    sourcesContent[source] = content;
+                }
+            });
+        }
+    }
+
+    function add(source, gen_line, gen_col, orig_line, orig_col, name) {
+        let generatedPos = { line: gen_line, column: gen_col };
+
+        if (orig_map) {
+            var info = orig_map.originalPositionFor({
+                line: orig_line,
+                column: orig_col
+            });
+            if (info.source === null) {
+                generator.addMapping({
+                    generated: generatedPos,
+                    original: null,
+                    source: null,
+                    name: null
+                });
+                return;
+            }
+            source = info.source;
+            orig_line = info.line;
+            orig_col = info.column;
+            name = info.name || name;
+        }
+        generator.addMapping({
+            generated : generatedPos,
+            original  : { line: orig_line, column: orig_col },
+            source    : source,
+            name      : name
+        });
+        generator.setSourceContent(source, sourcesContent[source]);
+    }
+
+    function clean(map) {
+        const allNull = map.sourcesContent && map.sourcesContent.every(c => c == null);
+        if (allNull) delete map.sourcesContent;
+        if (map.file === undefined) delete map.file;
+        if (map.sourceRoot === undefined) delete map.sourceRoot;
+        return map;
+    }
+
+    function getDecoded() {
+        if (!generator.toDecodedMap) return null;
+        return clean(generator.toDecodedMap());
+    }
+
+    function getEncoded() {
+        return clean(generator.toJSON());
+    }
+
+    function destroy() {
+        // @jridgewell/source-map's SourceMapConsumer does not need to be
+        // manually freed.
+        if (orig_map && orig_map.destroy) orig_map.destroy();
+    }
+
+    return {
+        add,
+        getDecoded,
+        getEncoded,
+        destroy,
+    };
+}
+
+export {
+    SourceMap,
+};
Index: frontend/node_modules/terser/lib/transform.js
===================================================================
--- frontend/node_modules/terser/lib/transform.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/transform.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,323 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+"use strict";
+
+import {
+    AST_Array,
+    AST_Await,
+    AST_Binary,
+    AST_PrivateIn,
+    AST_Block,
+    AST_Call,
+    AST_Case,
+    AST_Catch,
+    AST_Chain,
+    AST_Class,
+    AST_ClassStaticBlock,
+    AST_Conditional,
+    AST_DefinitionsLike,
+    AST_Destructuring,
+    AST_Do,
+    AST_Exit,
+    AST_Expansion,
+    AST_Export,
+    AST_For,
+    AST_ForIn,
+    AST_If,
+    AST_Import,
+    AST_LabeledStatement,
+    AST_Lambda,
+    AST_LoopControl,
+    AST_NameMapping,
+    AST_Node,
+    AST_Number,
+    AST_Object,
+    AST_ObjectProperty,
+    AST_PrefixedTemplateString,
+    AST_PropAccess,
+    AST_Sequence,
+    AST_SimpleStatement,
+    AST_Sub,
+    AST_Switch,
+    AST_TemplateString,
+    AST_Try,
+    AST_Unary,
+    AST_VarDefLike,
+    AST_While,
+    AST_With,
+    AST_Yield,
+} from "./ast.js";
+import {
+    MAP as do_list,
+    noop,
+} from "./utils/index.js";
+
+function def_transform(node, descend) {
+    node.DEFMETHOD("transform", function(tw, in_list) {
+        let transformed = undefined;
+        tw.push(this);
+        if (tw.before) transformed = tw.before(this, descend, in_list);
+        if (transformed === undefined) {
+            transformed = this;
+            descend(transformed, tw);
+            if (tw.after) {
+                const after_ret = tw.after(transformed, in_list);
+                if (after_ret !== undefined) transformed = after_ret;
+            }
+        }
+        tw.pop();
+        return transformed;
+    });
+}
+
+def_transform(AST_Node, noop);
+
+def_transform(AST_LabeledStatement, function(self, tw) {
+    self.label = self.label.transform(tw);
+    self.body = self.body.transform(tw);
+});
+
+def_transform(AST_SimpleStatement, function(self, tw) {
+    self.body = self.body.transform(tw);
+});
+
+def_transform(AST_Block, function(self, tw) {
+    self.body = do_list(self.body, tw);
+});
+
+def_transform(AST_Do, function(self, tw) {
+    self.body = self.body.transform(tw);
+    self.condition = self.condition.transform(tw);
+});
+
+def_transform(AST_While, function(self, tw) {
+    self.condition = self.condition.transform(tw);
+    self.body = self.body.transform(tw);
+});
+
+def_transform(AST_For, function(self, tw) {
+    if (self.init) self.init = self.init.transform(tw);
+    if (self.condition) self.condition = self.condition.transform(tw);
+    if (self.step) self.step = self.step.transform(tw);
+    self.body = self.body.transform(tw);
+});
+
+def_transform(AST_ForIn, function(self, tw) {
+    self.init = self.init.transform(tw);
+    self.object = self.object.transform(tw);
+    self.body = self.body.transform(tw);
+});
+
+def_transform(AST_With, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+    self.body = self.body.transform(tw);
+});
+
+def_transform(AST_Exit, function(self, tw) {
+    if (self.value) self.value = self.value.transform(tw);
+});
+
+def_transform(AST_LoopControl, function(self, tw) {
+    if (self.label) self.label = self.label.transform(tw);
+});
+
+def_transform(AST_If, function(self, tw) {
+    self.condition = self.condition.transform(tw);
+    self.body = self.body.transform(tw);
+    if (self.alternative) self.alternative = self.alternative.transform(tw);
+});
+
+def_transform(AST_Switch, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+    self.body = do_list(self.body, tw);
+});
+
+def_transform(AST_Case, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+    self.body = do_list(self.body, tw);
+});
+
+def_transform(AST_Try, function(self, tw) {
+    self.body = self.body.transform(tw);
+    if (self.bcatch) self.bcatch = self.bcatch.transform(tw);
+    if (self.bfinally) self.bfinally = self.bfinally.transform(tw);
+});
+
+def_transform(AST_Catch, function(self, tw) {
+    if (self.argname) self.argname = self.argname.transform(tw);
+    self.body = do_list(self.body, tw);
+});
+
+def_transform(AST_DefinitionsLike, function(self, tw) {
+    self.definitions = do_list(self.definitions, tw);
+});
+
+def_transform(AST_VarDefLike, function(self, tw) {
+    self.name = self.name.transform(tw);
+    if (self.value) self.value = self.value.transform(tw);
+});
+
+def_transform(AST_Destructuring, function(self, tw) {
+    self.names = do_list(self.names, tw);
+});
+
+def_transform(AST_Lambda, function(self, tw) {
+    if (self.name) self.name = self.name.transform(tw);
+    self.argnames = do_list(self.argnames, tw, /* allow_splicing */ false);
+    if (self.body instanceof AST_Node) {
+        self.body = self.body.transform(tw);
+    } else {
+        self.body = do_list(self.body, tw);
+    }
+});
+
+def_transform(AST_Call, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+    self.args = do_list(self.args, tw, /* allow_splicing */ false);
+});
+
+def_transform(AST_Sequence, function(self, tw) {
+    const result = do_list(self.expressions, tw);
+    self.expressions = result.length
+        ? result
+        : [new AST_Number({ value: 0 })];
+});
+
+def_transform(AST_PropAccess, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+});
+
+def_transform(AST_Sub, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+    self.property = self.property.transform(tw);
+});
+
+def_transform(AST_Chain, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+});
+
+def_transform(AST_Yield, function(self, tw) {
+    if (self.expression) self.expression = self.expression.transform(tw);
+});
+
+def_transform(AST_Await, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+});
+
+def_transform(AST_Unary, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+});
+
+def_transform(AST_Binary, function(self, tw) {
+    self.left = self.left.transform(tw);
+    self.right = self.right.transform(tw);
+});
+
+def_transform(AST_PrivateIn, function(self, tw) {
+    self.key = self.key.transform(tw);
+    self.value = self.value.transform(tw);
+});
+
+def_transform(AST_Conditional, function(self, tw) {
+    self.condition = self.condition.transform(tw);
+    self.consequent = self.consequent.transform(tw);
+    self.alternative = self.alternative.transform(tw);
+});
+
+def_transform(AST_Array, function(self, tw) {
+    self.elements = do_list(self.elements, tw);
+});
+
+def_transform(AST_Object, function(self, tw) {
+    self.properties = do_list(self.properties, tw);
+});
+
+def_transform(AST_ObjectProperty, function(self, tw) {
+    if (self.key instanceof AST_Node) {
+        self.key = self.key.transform(tw);
+    }
+    if (self.value) self.value = self.value.transform(tw);
+});
+
+def_transform(AST_Class, function(self, tw) {
+    if (self.name) self.name = self.name.transform(tw);
+    if (self.extends) self.extends = self.extends.transform(tw);
+    self.properties = do_list(self.properties, tw);
+});
+
+def_transform(AST_ClassStaticBlock, function(self, tw) {
+    self.body = do_list(self.body, tw);
+});
+
+def_transform(AST_Expansion, function(self, tw) {
+    self.expression = self.expression.transform(tw);
+});
+
+def_transform(AST_NameMapping, function(self, tw) {
+    self.foreign_name = self.foreign_name.transform(tw);
+    self.name = self.name.transform(tw);
+});
+
+def_transform(AST_Import, function(self, tw) {
+    if (self.imported_name) self.imported_name = self.imported_name.transform(tw);
+    if (self.imported_names) do_list(self.imported_names, tw);
+    self.module_name = self.module_name.transform(tw);
+});
+
+def_transform(AST_Export, function(self, tw) {
+    if (self.exported_definition) self.exported_definition = self.exported_definition.transform(tw);
+    if (self.exported_value) self.exported_value = self.exported_value.transform(tw);
+    if (self.exported_names) do_list(self.exported_names, tw);
+    if (self.module_name) self.module_name = self.module_name.transform(tw);
+});
+
+def_transform(AST_TemplateString, function(self, tw) {
+    self.segments = do_list(self.segments, tw);
+});
+
+def_transform(AST_PrefixedTemplateString, function(self, tw) {
+    self.prefix = self.prefix.transform(tw);
+    self.template_string = self.template_string.transform(tw);
+});
+
Index: frontend/node_modules/terser/lib/utils/first_in_statement.js
===================================================================
--- frontend/node_modules/terser/lib/utils/first_in_statement.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/utils/first_in_statement.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,53 @@
+import {
+    AST_Binary,
+    AST_Conditional,
+    AST_Chain,
+    AST_Dot,
+    AST_Object,
+    AST_Sequence,
+    AST_Statement,
+    AST_Sub,
+    AST_UnaryPostfix,
+    AST_PrefixedTemplateString
+} from "../ast.js";
+
+// return true if the node at the top of the stack (that means the
+// innermost node in the current output) is lexically the first in
+// a statement.
+function first_in_statement(stack) {
+    let node = stack.parent(-1);
+    for (let i = 0, p; p = stack.parent(i); i++) {
+        if (p instanceof AST_Statement && p.body === node)
+            return true;
+        if ((p instanceof AST_Sequence && p.expressions[0] === node) ||
+            (p.TYPE === "Call" && p.expression === node) ||
+            (p instanceof AST_PrefixedTemplateString && p.prefix === node) ||
+            (p instanceof AST_Dot && p.expression === node) ||
+            (p instanceof AST_Sub && p.expression === node) ||
+            (p instanceof AST_Chain && p.expression === node) ||
+            (p instanceof AST_Conditional && p.condition === node) ||
+            (p instanceof AST_Binary && p.left === node) ||
+            (p instanceof AST_UnaryPostfix && p.expression === node)
+        ) {
+            node = p;
+        } else {
+            return false;
+        }
+    }
+}
+
+// Returns whether the leftmost item in the expression is an object
+function left_is_object(node) {
+    if (node instanceof AST_Object) return true;
+    if (node instanceof AST_Sequence) return left_is_object(node.expressions[0]);
+    if (node.TYPE === "Call") return left_is_object(node.expression);
+    if (node instanceof AST_PrefixedTemplateString) return left_is_object(node.prefix);
+    if (node instanceof AST_Dot || node instanceof AST_Sub) return left_is_object(node.expression);
+    if (node instanceof AST_Chain) return left_is_object(node.expression);
+    if (node instanceof AST_Conditional) return left_is_object(node.condition);
+    if (node instanceof AST_Binary) return left_is_object(node.left);
+    if (node instanceof AST_UnaryPostfix) return left_is_object(node.expression);
+    return false;
+}
+
+export { first_in_statement, left_is_object };
Index: frontend/node_modules/terser/lib/utils/index.js
===================================================================
--- frontend/node_modules/terser/lib/utils/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/lib/utils/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,305 @@
+/***********************************************************************
+
+  A JavaScript tokenizer / parser / beautifier / compressor.
+  https://github.com/mishoo/UglifyJS2
+
+  -------------------------------- (C) ---------------------------------
+
+                           Author: Mihai Bazon
+                         <mihai.bazon@gmail.com>
+                       http://mihai.bazon.net/blog
+
+  Distributed under the BSD license:
+
+    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+        * Redistributions of source code must retain the above
+          copyright notice, this list of conditions and the following
+          disclaimer.
+
+        * Redistributions in binary form must reproduce the above
+          copyright notice, this list of conditions and the following
+          disclaimer in the documentation and/or other materials
+          provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+ ***********************************************************************/
+
+"use strict";
+
+import { AST_Node, AST_Number, AST_UnaryPrefix } from "../ast.js";
+
+function characters(str) {
+    return str.split("");
+}
+
+function member(name, array) {
+    return array.includes(name);
+}
+
+class DefaultsError extends Error {
+    constructor(msg, defs) {
+        super();
+
+        this.name = "DefaultsError";
+        this.message = msg;
+        this.defs = defs;
+    }
+}
+
+function defaults(args, defs, croak) {
+    if (args === true) {
+        args = {};
+    } else if (args != null && typeof args === "object") {
+        args = {...args};
+    }
+
+    const ret = args || {};
+
+    if (croak) for (const i in ret) if (HOP(ret, i) && !HOP(defs, i)) {
+        throw new DefaultsError("`" + i + "` is not a supported option", defs);
+    }
+
+    for (const i in defs) if (HOP(defs, i)) {
+        if (!args || !HOP(args, i)) {
+            ret[i] = defs[i];
+        } else if (i === "ecma" || i === "builtins_ecma") {
+            let ecma = args[i] | 0;
+            if (ecma > 5 && ecma < 2015) ecma += 2009;
+            ret[i] = ecma;
+        } else {
+            ret[i] = (args && HOP(args, i)) ? args[i] : defs[i];
+        }
+    }
+
+    return ret;
+}
+
+function noop() {}
+function return_false() { return false; }
+function return_true() { return true; }
+function return_this() { return this; }
+function return_null() { return null; }
+
+var MAP = (function() {
+    function MAP(a, tw, allow_splicing = true) {
+        const new_a = [];
+
+        for (let i = 0; i < a.length; ++i) {
+            let item = a[i];
+            let ret = item.transform(tw, allow_splicing);
+
+            if (ret instanceof AST_Node) {
+                new_a.push(ret);
+            } else if (ret instanceof Splice) {
+                new_a.push(...ret.v);
+            }
+        }
+
+        return new_a;
+    }
+
+    MAP.splice = function(val) { return new Splice(val); };
+    MAP.skip = {};
+    function Splice(val) { this.v = val; }
+    return MAP;
+})();
+
+function make_node(ctor, orig, props) {
+    if (!props) props = {};
+    if (orig) {
+        if (!props.start) props.start = orig.start;
+        if (!props.end) props.end = orig.end;
+    }
+    return new ctor(props);
+}
+
+/** Makes a `void 0` expression. Use instead of AST_Undefined which may conflict
+ * with an existing variable called `undefined` */
+function make_void_0(orig) {
+    return make_node(AST_UnaryPrefix, orig, {
+        operator: "void",
+        expression: make_node(AST_Number, orig, { value: 0 })
+    });
+}
+
+function push_uniq(array, el) {
+    if (!array.includes(el))
+        array.push(el);
+}
+
+function string_template(text, props) {
+    return text.replace(/{(.+?)}/g, function(str, p) {
+        return props && props[p];
+    });
+}
+
+function remove(array, el) {
+    for (var i = array.length; --i >= 0;) {
+        if (array[i] === el) array.splice(i, 1);
+    }
+}
+
+function mergeSort(array, cmp) {
+    if (array.length < 2) return array.slice();
+    function merge(a, b) {
+        var r = [], ai = 0, bi = 0, i = 0;
+        while (ai < a.length && bi < b.length) {
+            cmp(a[ai], b[bi]) <= 0
+                ? r[i++] = a[ai++]
+                : r[i++] = b[bi++];
+        }
+        if (ai < a.length) r.push.apply(r, a.slice(ai));
+        if (bi < b.length) r.push.apply(r, b.slice(bi));
+        return r;
+    }
+    function _ms(a) {
+        if (a.length <= 1)
+            return a;
+        var m = Math.floor(a.length / 2), left = a.slice(0, m), right = a.slice(m);
+        left = _ms(left);
+        right = _ms(right);
+        return merge(left, right);
+    }
+    return _ms(array);
+}
+
+function makePredicate(words) {
+    if (!Array.isArray(words)) words = words.split(" ");
+
+    return new Set(words.sort());
+}
+
+function map_add(map, key, value) {
+    if (map.has(key)) {
+        map.get(key).push(value);
+    } else {
+        map.set(key, [ value ]);
+    }
+}
+
+function map_from_object(obj) {
+    var map = new Map();
+    for (var key in obj) {
+        if (HOP(obj, key) && key.charAt(0) === "$") {
+            map.set(key.substr(1), obj[key]);
+        }
+    }
+    return map;
+}
+
+function map_to_object(map) {
+    var obj = Object.create(null);
+    map.forEach(function (value, key) {
+        obj["$" + key] = value;
+    });
+    return obj;
+}
+
+function HOP(obj, prop) {
+    return Object.prototype.hasOwnProperty.call(obj, prop);
+}
+
+function keep_name(keep_setting, name) {
+    return keep_setting === true
+        || (keep_setting instanceof RegExp && keep_setting.test(name));
+}
+
+var lineTerminatorEscape = {
+    "\0": "0",
+    "\n": "n",
+    "\r": "r",
+    "\u2028": "u2028",
+    "\u2029": "u2029",
+};
+function regexp_source_fix(source) {
+    // V8 does not escape line terminators in regexp patterns in node 12
+    // We'll also remove literal \0
+    return source.replace(/[\0\n\r\u2028\u2029]/g, function (match, offset) {
+        var escaped = source[offset - 1] == "\\"
+            && (source[offset - 2] != "\\"
+            || /(?:^|[^\\])(?:\\{2})*$/.test(source.slice(0, offset - 1)));
+        return (escaped ? "" : "\\") + lineTerminatorEscape[match];
+    });
+}
+
+// Subset of regexps that is not going to cause regexp based DDOS
+// https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS
+const re_safe_regexp = /^[\\/|\0\s\w^$.[\]()]*$/;
+
+/** Check if the regexp is safe for Terser to create without risking a RegExp DOS */
+export const regexp_is_safe = (source) => re_safe_regexp.test(source);
+
+const all_flags = "dgimsuyv";
+function sort_regexp_flags(flags) {
+    const existing_flags = new Set(flags.split(""));
+    let out = "";
+    for (const flag of all_flags) {
+        if (existing_flags.has(flag)) {
+            out += flag;
+            existing_flags.delete(flag);
+        }
+    }
+    if (existing_flags.size) {
+        // Flags Terser doesn't know about
+        existing_flags.forEach(flag => { out += flag; });
+    }
+    return out;
+}
+
+function has_annotation(node, annotation) {
+    return node._annotations & annotation;
+}
+
+function set_annotation(node, annotation) {
+    node._annotations |= annotation;
+}
+
+function clear_annotation(node, annotation) {
+    node._annotations &= ~annotation;
+}
+
+export {
+    characters,
+    defaults,
+    HOP,
+    keep_name,
+    make_node,
+    make_void_0,
+    makePredicate,
+    map_add,
+    map_from_object,
+    map_to_object,
+    MAP,
+    member,
+    mergeSort,
+    noop,
+    push_uniq,
+    regexp_source_fix,
+    remove,
+    return_false,
+    return_null,
+    return_this,
+    return_true,
+    sort_regexp_flags,
+    string_template,
+    has_annotation,
+    set_annotation,
+    clear_annotation,
+};
Index: frontend/node_modules/terser/main.js
===================================================================
--- frontend/node_modules/terser/main.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/main.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,27 @@
+import "./lib/transform.js";
+import "./lib/mozilla-ast.js";
+import { minify } from "./lib/minify.js";
+
+export { minify, minify_sync } from "./lib/minify.js";
+export { run_cli as _run_cli } from "./lib/cli.js";
+
+export async function _default_options() {
+    const defs = {};
+
+    Object.keys(infer_options({ 0: 0 })).forEach((component) => {
+        const options = infer_options({
+            [component]: {0: 0}
+        });
+
+        if (options) defs[component] = options;
+    });
+    return defs;
+}
+
+async function infer_options(options) {
+    try {
+        await minify("", options);
+    } catch (error) {
+        return error.defs;
+    }
+}
Index: frontend/node_modules/terser/node_modules/commander/CHANGELOG.md
===================================================================
--- frontend/node_modules/terser/node_modules/commander/CHANGELOG.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/node_modules/commander/CHANGELOG.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,419 @@
+2.20.3 / 2019-10-11
+==================
+
+  * Support Node.js 0.10 (Revert #1059)
+  * Ran "npm unpublish commander@2.20.2". There is no 2.20.2.
+
+2.20.1 / 2019-09-29
+==================
+
+  * Improve executable subcommand tracking
+  * Update dev dependencies
+
+2.20.0 / 2019-04-02
+==================
+
+  * fix: resolve symbolic links completely when hunting for subcommands (#935)
+  * Update index.d.ts (#930)
+  * Update Readme.md (#924)
+  * Remove --save option as it isn't required anymore (#918)
+  * Add link to the license file (#900)
+  * Added example of receiving args from options (#858)
+  * Added missing semicolon (#882)
+  * Add extension to .eslintrc (#876)
+
+2.19.0 / 2018-10-02
+==================
+
+  * Removed newline after Options and Commands headers (#864)
+  * Bugfix - Error output (#862)
+  * Fix to change default value to string (#856)
+
+2.18.0 / 2018-09-07
+==================
+
+  * Standardize help output (#853)
+  * chmod 644 travis.yml (#851)
+  * add support for execute typescript subcommand via ts-node (#849)
+
+2.17.1 / 2018-08-07
+==================
+
+  * Fix bug in command emit (#844)
+
+2.17.0 / 2018-08-03
+==================
+
+  * fixed newline output after help information (#833)
+  * Fix to emit the action even without command (#778)
+  * npm update (#823)
+
+2.16.0 / 2018-06-29
+==================
+
+  * Remove Makefile and `test/run` (#821)
+  * Make 'npm test' run on Windows (#820)
+  * Add badge to display install size (#807)
+  * chore: cache node_modules (#814)
+  * chore: remove Node.js 4 (EOL), add Node.js 10 (#813)
+  * fixed typo in readme (#812)
+  * Fix types (#804)
+  * Update eslint to resolve vulnerabilities in lodash (#799)
+  * updated readme with custom event listeners. (#791)
+  * fix tests (#794)
+
+2.15.0 / 2018-03-07
+==================
+
+  * Update downloads badge to point to graph of downloads over time instead of duplicating link to npm
+  * Arguments description
+
+2.14.1 / 2018-02-07
+==================
+
+  * Fix typing of help function
+
+2.14.0 / 2018-02-05
+==================
+
+  * only register the option:version event once
+  * Fixes issue #727: Passing empty string for option on command is set to undefined
+  * enable eqeqeq rule
+  * resolves #754 add linter configuration to project
+  * resolves #560 respect custom name for version option
+  * document how to override the version flag
+  * document using options per command
+
+2.13.0 / 2018-01-09
+==================
+
+  * Do not print default for --no-
+  * remove trailing spaces in command help
+  * Update CI's Node.js to LTS and latest version
+  * typedefs: Command and Option types added to commander namespace
+
+2.12.2 / 2017-11-28
+==================
+
+  * fix: typings are not shipped
+
+2.12.1 / 2017-11-23
+==================
+
+  * Move @types/node to dev dependency
+
+2.12.0 / 2017-11-22
+==================
+
+  * add attributeName() method to Option objects
+  * Documentation updated for options with --no prefix
+  * typings: `outputHelp` takes a string as the first parameter
+  * typings: use overloads
+  * feat(typings): update to match js api
+  * Print default value in option help
+  * Fix translation error
+  * Fail when using same command and alias (#491)
+  * feat(typings): add help callback
+  * fix bug when description is add after command with options (#662)
+  * Format js code
+  * Rename History.md to CHANGELOG.md (#668)
+  * feat(typings): add typings to support TypeScript (#646)
+  * use current node
+
+2.11.0 / 2017-07-03
+==================
+
+  * Fix help section order and padding (#652)
+  * feature: support for signals to subcommands (#632)
+  * Fixed #37, --help should not display first (#447)
+  * Fix translation errors. (#570)
+  * Add package-lock.json
+  * Remove engines
+  * Upgrade package version
+  * Prefix events to prevent conflicts between commands and options (#494)
+  * Removing dependency on graceful-readlink
+  * Support setting name in #name function and make it chainable
+  * Add .vscode directory to .gitignore (Visual Studio Code metadata)
+  * Updated link to ruby commander in readme files
+
+2.10.0 / 2017-06-19
+==================
+
+  * Update .travis.yml. drop support for older node.js versions.
+  * Fix require arguments in README.md
+  * On SemVer you do not start from 0.0.1
+  * Add missing semi colon in readme
+  * Add save param to npm install
+  * node v6 travis test
+  * Update Readme_zh-CN.md
+  * Allow literal '--' to be passed-through as an argument
+  * Test subcommand alias help
+  * link build badge to master branch
+  * Support the alias of Git style sub-command
+  * added keyword commander for better search result on npm
+  * Fix Sub-Subcommands
+  * test node.js stable
+  * Fixes TypeError when a command has an option called `--description`
+  * Update README.md to make it beginner friendly and elaborate on the difference between angled and square brackets.
+  * Add chinese Readme file
+
+2.9.0 / 2015-10-13
+==================
+
+  * Add option `isDefault` to set default subcommand #415 @Qix-
+  * Add callback to allow filtering or post-processing of help text #434 @djulien
+  * Fix `undefined` text in help information close #414 #416 @zhiyelee
+
+2.8.1 / 2015-04-22
+==================
+
+ * Back out `support multiline description` Close #396 #397
+
+2.8.0 / 2015-04-07
+==================
+
+  * Add `process.execArg` support, execution args like `--harmony` will be passed to sub-commands #387 @DigitalIO @zhiyelee
+  * Fix bug in Git-style sub-commands #372 @zhiyelee
+  * Allow commands to be hidden from help #383 @tonylukasavage
+  * When git-style sub-commands are in use, yet none are called, display help #382 @claylo
+  * Add ability to specify arguments syntax for top-level command #258 @rrthomas
+  * Support multiline descriptions #208 @zxqfox
+
+2.7.1 / 2015-03-11
+==================
+
+ * Revert #347 (fix collisions when option and first arg have same name) which causes a bug in #367.
+
+2.7.0 / 2015-03-09
+==================
+
+ * Fix git-style bug when installed globally. Close #335 #349 @zhiyelee
+ * Fix collisions when option and first arg have same name. Close #346 #347 @tonylukasavage
+ * Add support for camelCase on `opts()`. Close #353  @nkzawa
+ * Add node.js 0.12 and io.js to travis.yml
+ * Allow RegEx options. #337 @palanik
+ * Fixes exit code when sub-command failing.  Close #260 #332 @pirelenito
+ * git-style `bin` files in $PATH make sense. Close #196 #327  @zhiyelee
+
+2.6.0 / 2014-12-30
+==================
+
+  * added `Command#allowUnknownOption` method. Close #138 #318 @doozr @zhiyelee
+  * Add application description to the help msg. Close #112 @dalssoft
+
+2.5.1 / 2014-12-15
+==================
+
+  * fixed two bugs incurred by variadic arguments. Close #291 @Quentin01 #302 @zhiyelee
+
+2.5.0 / 2014-10-24
+==================
+
+ * add support for variadic arguments. Closes #277 @whitlockjc
+
+2.4.0 / 2014-10-17
+==================
+
+ * fixed a bug on executing the coercion function of subcommands option. Closes #270
+ * added `Command.prototype.name` to retrieve command name. Closes #264 #266 @tonylukasavage
+ * added `Command.prototype.opts` to retrieve all the options as a simple object of key-value pairs. Closes #262 @tonylukasavage
+ * fixed a bug on subcommand name. Closes #248 @jonathandelgado
+ * fixed function normalize doesn’t honor option terminator. Closes #216 @abbr
+
+2.3.0 / 2014-07-16
+==================
+
+ * add command alias'. Closes PR #210
+ * fix: Typos. Closes #99
+ * fix: Unused fs module. Closes #217
+
+2.2.0 / 2014-03-29
+==================
+
+ * add passing of previous option value
+ * fix: support subcommands on windows. Closes #142
+ * Now the defaultValue passed as the second argument of the coercion function.
+
+2.1.0 / 2013-11-21
+==================
+
+ * add: allow cflag style option params, unit test, fixes #174
+
+2.0.0 / 2013-07-18
+==================
+
+ * remove input methods (.prompt, .confirm, etc)
+
+1.3.2 / 2013-07-18
+==================
+
+ * add support for sub-commands to co-exist with the original command
+
+1.3.1 / 2013-07-18
+==================
+
+ * add quick .runningCommand hack so you can opt-out of other logic when running a sub command
+
+1.3.0 / 2013-07-09
+==================
+
+ * add EACCES error handling
+ * fix sub-command --help
+
+1.2.0 / 2013-06-13
+==================
+
+ * allow "-" hyphen as an option argument
+ * support for RegExp coercion
+
+1.1.1 / 2012-11-20
+==================
+
+  * add more sub-command padding
+  * fix .usage() when args are present. Closes #106
+
+1.1.0 / 2012-11-16
+==================
+
+  * add git-style executable subcommand support. Closes #94
+
+1.0.5 / 2012-10-09
+==================
+
+  * fix `--name` clobbering. Closes #92
+  * fix examples/help. Closes #89
+
+1.0.4 / 2012-09-03
+==================
+
+  * add `outputHelp()` method.
+
+1.0.3 / 2012-08-30
+==================
+
+  * remove invalid .version() defaulting
+
+1.0.2 / 2012-08-24
+==================
+
+  * add `--foo=bar` support [arv]
+  * fix password on node 0.8.8. Make backward compatible with 0.6 [focusaurus]
+
+1.0.1 / 2012-08-03
+==================
+
+  * fix issue #56
+  * fix tty.setRawMode(mode) was moved to tty.ReadStream#setRawMode() (i.e. process.stdin.setRawMode())
+
+1.0.0 / 2012-07-05
+==================
+
+  * add support for optional option descriptions
+  * add defaulting of `.version()` to package.json's version
+
+0.6.1 / 2012-06-01
+==================
+
+  * Added: append (yes or no) on confirmation
+  * Added: allow node.js v0.7.x
+
+0.6.0 / 2012-04-10
+==================
+
+  * Added `.prompt(obj, callback)` support. Closes #49
+  * Added default support to .choose(). Closes #41
+  * Fixed the choice example
+
+0.5.1 / 2011-12-20
+==================
+
+  * Fixed `password()` for recent nodes. Closes #36
+
+0.5.0 / 2011-12-04
+==================
+
+  * Added sub-command option support [itay]
+
+0.4.3 / 2011-12-04
+==================
+
+  * Fixed custom help ordering. Closes #32
+
+0.4.2 / 2011-11-24
+==================
+
+  * Added travis support
+  * Fixed: line-buffered input automatically trimmed. Closes #31
+
+0.4.1 / 2011-11-18
+==================
+
+  * Removed listening for "close" on --help
+
+0.4.0 / 2011-11-15
+==================
+
+  * Added support for `--`. Closes #24
+
+0.3.3 / 2011-11-14
+==================
+
+  * Fixed: wait for close event when writing help info [Jerry Hamlet]
+
+0.3.2 / 2011-11-01
+==================
+
+  * Fixed long flag definitions with values [felixge]
+
+0.3.1 / 2011-10-31
+==================
+
+  * Changed `--version` short flag to `-V` from `-v`
+  * Changed `.version()` so it's configurable [felixge]
+
+0.3.0 / 2011-10-31
+==================
+
+  * Added support for long flags only. Closes #18
+
+0.2.1 / 2011-10-24
+==================
+
+  * "node": ">= 0.4.x < 0.7.0". Closes #20
+
+0.2.0 / 2011-09-26
+==================
+
+  * Allow for defaults that are not just boolean. Default peassignment only occurs for --no-*, optional, and required arguments. [Jim Isaacs]
+
+0.1.0 / 2011-08-24
+==================
+
+  * Added support for custom `--help` output
+
+0.0.5 / 2011-08-18
+==================
+
+  * Changed: when the user enters nothing prompt for password again
+  * Fixed issue with passwords beginning with numbers [NuckChorris]
+
+0.0.4 / 2011-08-15
+==================
+
+  * Fixed `Commander#args`
+
+0.0.3 / 2011-08-15
+==================
+
+  * Added default option value support
+
+0.0.2 / 2011-08-15
+==================
+
+  * Added mask support to `Command#password(str[, mask], fn)`
+  * Added `Command#password(str, fn)`
+
+0.0.1 / 2010-01-03
+==================
+
+  * Initial release
Index: frontend/node_modules/terser/node_modules/commander/LICENSE
===================================================================
--- frontend/node_modules/terser/node_modules/commander/LICENSE	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/node_modules/commander/LICENSE	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,22 @@
+(The MIT License)
+
+Copyright (c) 2011 TJ Holowaychuk <tj@vision-media.ca>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Index: frontend/node_modules/terser/node_modules/commander/Readme.md
===================================================================
--- frontend/node_modules/terser/node_modules/commander/Readme.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/node_modules/commander/Readme.md	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,428 @@
+# Commander.js
+
+
+[![Build Status](https://api.travis-ci.org/tj/commander.js.svg?branch=master)](http://travis-ci.org/tj/commander.js)
+[![NPM Version](http://img.shields.io/npm/v/commander.svg?style=flat)](https://www.npmjs.org/package/commander)
+[![NPM Downloads](https://img.shields.io/npm/dm/commander.svg?style=flat)](https://npmcharts.com/compare/commander?minimal=true)
+[![Install Size](https://packagephobia.now.sh/badge?p=commander)](https://packagephobia.now.sh/result?p=commander)
+[![Join the chat at https://gitter.im/tj/commander.js](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/tj/commander.js?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
+  The complete solution for [node.js](http://nodejs.org) command-line interfaces, inspired by Ruby's [commander](https://github.com/commander-rb/commander).  
+  [API documentation](http://tj.github.com/commander.js/)
+
+
+## Installation
+
+    $ npm install commander
+
+## Option parsing
+
+Options with commander are defined with the `.option()` method, also serving as documentation for the options. The example below parses args and options from `process.argv`, leaving remaining args as the `program.args` array which were not consumed by options.
+
+```js
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var program = require('commander');
+
+program
+  .version('0.1.0')
+  .option('-p, --peppers', 'Add peppers')
+  .option('-P, --pineapple', 'Add pineapple')
+  .option('-b, --bbq-sauce', 'Add bbq sauce')
+  .option('-c, --cheese [type]', 'Add the specified type of cheese [marble]', 'marble')
+  .parse(process.argv);
+
+console.log('you ordered a pizza with:');
+if (program.peppers) console.log('  - peppers');
+if (program.pineapple) console.log('  - pineapple');
+if (program.bbqSauce) console.log('  - bbq');
+console.log('  - %s cheese', program.cheese);
+```
+
+Short flags may be passed as a single arg, for example `-abc` is equivalent to `-a -b -c`. Multi-word options such as "--template-engine" are camel-cased, becoming `program.templateEngine` etc.
+
+Note that multi-word options starting with `--no` prefix negate the boolean value of the following word. For example, `--no-sauce` sets the value of `program.sauce` to false.
+
+```js
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var program = require('commander');
+
+program
+  .option('--no-sauce', 'Remove sauce')
+  .parse(process.argv);
+
+console.log('you ordered a pizza');
+if (program.sauce) console.log('  with sauce');
+else console.log(' without sauce');
+```
+
+To get string arguments from options you will need to use angle brackets <> for required inputs or square brackets [] for optional inputs. 
+
+e.g. ```.option('-m --myarg [myVar]', 'my super cool description')```
+
+Then to access the input if it was passed in.
+
+e.g. ```var myInput = program.myarg```
+
+**NOTE**: If you pass a argument without using brackets the example above will return true and not the value passed in.
+
+
+## Version option
+
+Calling the `version` implicitly adds the `-V` and `--version` options to the command.
+When either of these options is present, the command prints the version number and exits.
+
+    $ ./examples/pizza -V
+    0.0.1
+
+If you want your program to respond to the `-v` option instead of the `-V` option, simply pass custom flags to the `version` method using the same syntax as the `option` method.
+
+```js
+program
+  .version('0.0.1', '-v, --version')
+```
+
+The version flags can be named anything, but the long option is required.
+
+## Command-specific options
+
+You can attach options to a command.
+
+```js
+#!/usr/bin/env node
+
+var program = require('commander');
+
+program
+  .command('rm <dir>')
+  .option('-r, --recursive', 'Remove recursively')
+  .action(function (dir, cmd) {
+    console.log('remove ' + dir + (cmd.recursive ? ' recursively' : ''))
+  })
+
+program.parse(process.argv)
+```
+
+A command's options are validated when the command is used. Any unknown options will be reported as an error. However, if an action-based command does not define an action, then the options are not validated.
+
+## Coercion
+
+```js
+function range(val) {
+  return val.split('..').map(Number);
+}
+
+function list(val) {
+  return val.split(',');
+}
+
+function collect(val, memo) {
+  memo.push(val);
+  return memo;
+}
+
+function increaseVerbosity(v, total) {
+  return total + 1;
+}
+
+program
+  .version('0.1.0')
+  .usage('[options] <file ...>')
+  .option('-i, --integer <n>', 'An integer argument', parseInt)
+  .option('-f, --float <n>', 'A float argument', parseFloat)
+  .option('-r, --range <a>..<b>', 'A range', range)
+  .option('-l, --list <items>', 'A list', list)
+  .option('-o, --optional [value]', 'An optional value')
+  .option('-c, --collect [value]', 'A repeatable value', collect, [])
+  .option('-v, --verbose', 'A value that can be increased', increaseVerbosity, 0)
+  .parse(process.argv);
+
+console.log(' int: %j', program.integer);
+console.log(' float: %j', program.float);
+console.log(' optional: %j', program.optional);
+program.range = program.range || [];
+console.log(' range: %j..%j', program.range[0], program.range[1]);
+console.log(' list: %j', program.list);
+console.log(' collect: %j', program.collect);
+console.log(' verbosity: %j', program.verbose);
+console.log(' args: %j', program.args);
+```
+
+## Regular Expression
+```js
+program
+  .version('0.1.0')
+  .option('-s --size <size>', 'Pizza size', /^(large|medium|small)$/i, 'medium')
+  .option('-d --drink [drink]', 'Drink', /^(coke|pepsi|izze)$/i)
+  .parse(process.argv);
+
+console.log(' size: %j', program.size);
+console.log(' drink: %j', program.drink);
+```
+
+## Variadic arguments
+
+ The last argument of a command can be variadic, and only the last argument.  To make an argument variadic you have to
+ append `...` to the argument name.  Here is an example:
+
+```js
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var program = require('commander');
+
+program
+  .version('0.1.0')
+  .command('rmdir <dir> [otherDirs...]')
+  .action(function (dir, otherDirs) {
+    console.log('rmdir %s', dir);
+    if (otherDirs) {
+      otherDirs.forEach(function (oDir) {
+        console.log('rmdir %s', oDir);
+      });
+    }
+  });
+
+program.parse(process.argv);
+```
+
+ An `Array` is used for the value of a variadic argument.  This applies to `program.args` as well as the argument passed
+ to your action as demonstrated above.
+
+## Specify the argument syntax
+
+```js
+#!/usr/bin/env node
+
+var program = require('commander');
+
+program
+  .version('0.1.0')
+  .arguments('<cmd> [env]')
+  .action(function (cmd, env) {
+     cmdValue = cmd;
+     envValue = env;
+  });
+
+program.parse(process.argv);
+
+if (typeof cmdValue === 'undefined') {
+   console.error('no command given!');
+   process.exit(1);
+}
+console.log('command:', cmdValue);
+console.log('environment:', envValue || "no environment given");
+```
+Angled brackets (e.g. `<cmd>`) indicate required input. Square brackets (e.g. `[env]`) indicate optional input.
+
+## Git-style sub-commands
+
+```js
+// file: ./examples/pm
+var program = require('commander');
+
+program
+  .version('0.1.0')
+  .command('install [name]', 'install one or more packages')
+  .command('search [query]', 'search with optional query')
+  .command('list', 'list packages installed', {isDefault: true})
+  .parse(process.argv);
+```
+
+When `.command()` is invoked with a description argument, no `.action(callback)` should be called to handle sub-commands, otherwise there will be an error. This tells commander that you're going to use separate executables for sub-commands, much like `git(1)` and other popular tools.  
+The commander will try to search the executables in the directory of the entry script (like `./examples/pm`) with the name `program-command`, like `pm-install`, `pm-search`.
+
+Options can be passed with the call to `.command()`. Specifying `true` for `opts.noHelp` will remove the subcommand from the generated help output. Specifying `true` for `opts.isDefault` will run the subcommand if no other subcommand is specified.
+
+If the program is designed to be installed globally, make sure the executables have proper modes, like `755`.
+
+### `--harmony`
+
+You can enable `--harmony` option in two ways:
+* Use `#! /usr/bin/env node --harmony` in the sub-commands scripts. Note some os version don’t support this pattern.
+* Use the `--harmony` option when call the command, like `node --harmony examples/pm publish`. The `--harmony` option will be preserved when spawning sub-command process.
+
+## Automated --help
+
+ The help information is auto-generated based on the information commander already knows about your program, so the following `--help` info is for free:
+
+```  
+$ ./examples/pizza --help
+Usage: pizza [options]
+
+An application for pizzas ordering
+
+Options:
+  -h, --help           output usage information
+  -V, --version        output the version number
+  -p, --peppers        Add peppers
+  -P, --pineapple      Add pineapple
+  -b, --bbq            Add bbq sauce
+  -c, --cheese <type>  Add the specified type of cheese [marble]
+  -C, --no-cheese      You do not want any cheese
+```
+
+## Custom help
+
+ You can display arbitrary `-h, --help` information
+ by listening for "--help". Commander will automatically
+ exit once you are done so that the remainder of your program
+ does not execute causing undesired behaviors, for example
+ in the following executable "stuff" will not output when
+ `--help` is used.
+
+```js
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var program = require('commander');
+
+program
+  .version('0.1.0')
+  .option('-f, --foo', 'enable some foo')
+  .option('-b, --bar', 'enable some bar')
+  .option('-B, --baz', 'enable some baz');
+
+// must be before .parse() since
+// node's emit() is immediate
+
+program.on('--help', function(){
+  console.log('')
+  console.log('Examples:');
+  console.log('  $ custom-help --help');
+  console.log('  $ custom-help -h');
+});
+
+program.parse(process.argv);
+
+console.log('stuff');
+```
+
+Yields the following help output when `node script-name.js -h` or `node script-name.js --help` are run:
+
+```
+Usage: custom-help [options]
+
+Options:
+  -h, --help     output usage information
+  -V, --version  output the version number
+  -f, --foo      enable some foo
+  -b, --bar      enable some bar
+  -B, --baz      enable some baz
+
+Examples:
+  $ custom-help --help
+  $ custom-help -h
+```
+
+## .outputHelp(cb)
+
+Output help information without exiting.
+Optional callback cb allows post-processing of help text before it is displayed.
+
+If you want to display help by default (e.g. if no command was provided), you can use something like:
+
+```js
+var program = require('commander');
+var colors = require('colors');
+
+program
+  .version('0.1.0')
+  .command('getstream [url]', 'get stream URL')
+  .parse(process.argv);
+
+if (!process.argv.slice(2).length) {
+  program.outputHelp(make_red);
+}
+
+function make_red(txt) {
+  return colors.red(txt); //display the help text in red on the console
+}
+```
+
+## .help(cb)
+
+  Output help information and exit immediately.
+  Optional callback cb allows post-processing of help text before it is displayed.
+
+
+## Custom event listeners
+ You can execute custom actions by listening to command and option events.
+
+```js
+program.on('option:verbose', function () {
+  process.env.VERBOSE = this.verbose;
+});
+
+// error on unknown commands
+program.on('command:*', function () {
+  console.error('Invalid command: %s\nSee --help for a list of available commands.', program.args.join(' '));
+  process.exit(1);
+});
+```
+
+## Examples
+
+```js
+var program = require('commander');
+
+program
+  .version('0.1.0')
+  .option('-C, --chdir <path>', 'change the working directory')
+  .option('-c, --config <path>', 'set config path. defaults to ./deploy.conf')
+  .option('-T, --no-tests', 'ignore test hook');
+
+program
+  .command('setup [env]')
+  .description('run setup commands for all envs')
+  .option("-s, --setup_mode [mode]", "Which setup mode to use")
+  .action(function(env, options){
+    var mode = options.setup_mode || "normal";
+    env = env || 'all';
+    console.log('setup for %s env(s) with %s mode', env, mode);
+  });
+
+program
+  .command('exec <cmd>')
+  .alias('ex')
+  .description('execute the given remote cmd')
+  .option("-e, --exec_mode <mode>", "Which exec mode to use")
+  .action(function(cmd, options){
+    console.log('exec "%s" using %s mode', cmd, options.exec_mode);
+  }).on('--help', function() {
+    console.log('');
+    console.log('Examples:');
+    console.log('');
+    console.log('  $ deploy exec sequential');
+    console.log('  $ deploy exec async');
+  });
+
+program
+  .command('*')
+  .action(function(env){
+    console.log('deploying "%s"', env);
+  });
+
+program.parse(process.argv);
+```
+
+More Demos can be found in the [examples](https://github.com/tj/commander.js/tree/master/examples) directory.
+
+## License
+
+[MIT](https://github.com/tj/commander.js/blob/master/LICENSE)
Index: frontend/node_modules/terser/node_modules/commander/index.js
===================================================================
--- frontend/node_modules/terser/node_modules/commander/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/node_modules/commander/index.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,1224 @@
+/**
+ * Module dependencies.
+ */
+
+var EventEmitter = require('events').EventEmitter;
+var spawn = require('child_process').spawn;
+var path = require('path');
+var dirname = path.dirname;
+var basename = path.basename;
+var fs = require('fs');
+
+/**
+ * Inherit `Command` from `EventEmitter.prototype`.
+ */
+
+require('util').inherits(Command, EventEmitter);
+
+/**
+ * Expose the root command.
+ */
+
+exports = module.exports = new Command();
+
+/**
+ * Expose `Command`.
+ */
+
+exports.Command = Command;
+
+/**
+ * Expose `Option`.
+ */
+
+exports.Option = Option;
+
+/**
+ * Initialize a new `Option` with the given `flags` and `description`.
+ *
+ * @param {String} flags
+ * @param {String} description
+ * @api public
+ */
+
+function Option(flags, description) {
+  this.flags = flags;
+  this.required = flags.indexOf('<') >= 0;
+  this.optional = flags.indexOf('[') >= 0;
+  this.bool = flags.indexOf('-no-') === -1;
+  flags = flags.split(/[ ,|]+/);
+  if (flags.length > 1 && !/^[[<]/.test(flags[1])) this.short = flags.shift();
+  this.long = flags.shift();
+  this.description = description || '';
+}
+
+/**
+ * Return option name.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Option.prototype.name = function() {
+  return this.long
+    .replace('--', '')
+    .replace('no-', '');
+};
+
+/**
+ * Return option name, in a camelcase format that can be used
+ * as a object attribute key.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Option.prototype.attributeName = function() {
+  return camelcase(this.name());
+};
+
+/**
+ * Check if `arg` matches the short or long flag.
+ *
+ * @param {String} arg
+ * @return {Boolean}
+ * @api private
+ */
+
+Option.prototype.is = function(arg) {
+  return this.short === arg || this.long === arg;
+};
+
+/**
+ * Initialize a new `Command`.
+ *
+ * @param {String} name
+ * @api public
+ */
+
+function Command(name) {
+  this.commands = [];
+  this.options = [];
+  this._execs = {};
+  this._allowUnknownOption = false;
+  this._args = [];
+  this._name = name || '';
+}
+
+/**
+ * Add command `name`.
+ *
+ * The `.action()` callback is invoked when the
+ * command `name` is specified via __ARGV__,
+ * and the remaining arguments are applied to the
+ * function for access.
+ *
+ * When the `name` is "*" an un-matched command
+ * will be passed as the first arg, followed by
+ * the rest of __ARGV__ remaining.
+ *
+ * Examples:
+ *
+ *      program
+ *        .version('0.0.1')
+ *        .option('-C, --chdir <path>', 'change the working directory')
+ *        .option('-c, --config <path>', 'set config path. defaults to ./deploy.conf')
+ *        .option('-T, --no-tests', 'ignore test hook')
+ *
+ *      program
+ *        .command('setup')
+ *        .description('run remote setup commands')
+ *        .action(function() {
+ *          console.log('setup');
+ *        });
+ *
+ *      program
+ *        .command('exec <cmd>')
+ *        .description('run the given remote command')
+ *        .action(function(cmd) {
+ *          console.log('exec "%s"', cmd);
+ *        });
+ *
+ *      program
+ *        .command('teardown <dir> [otherDirs...]')
+ *        .description('run teardown commands')
+ *        .action(function(dir, otherDirs) {
+ *          console.log('dir "%s"', dir);
+ *          if (otherDirs) {
+ *            otherDirs.forEach(function (oDir) {
+ *              console.log('dir "%s"', oDir);
+ *            });
+ *          }
+ *        });
+ *
+ *      program
+ *        .command('*')
+ *        .description('deploy the given env')
+ *        .action(function(env) {
+ *          console.log('deploying "%s"', env);
+ *        });
+ *
+ *      program.parse(process.argv);
+  *
+ * @param {String} name
+ * @param {String} [desc] for git-style sub-commands
+ * @return {Command} the new command
+ * @api public
+ */
+
+Command.prototype.command = function(name, desc, opts) {
+  if (typeof desc === 'object' && desc !== null) {
+    opts = desc;
+    desc = null;
+  }
+  opts = opts || {};
+  var args = name.split(/ +/);
+  var cmd = new Command(args.shift());
+
+  if (desc) {
+    cmd.description(desc);
+    this.executables = true;
+    this._execs[cmd._name] = true;
+    if (opts.isDefault) this.defaultExecutable = cmd._name;
+  }
+  cmd._noHelp = !!opts.noHelp;
+  this.commands.push(cmd);
+  cmd.parseExpectedArgs(args);
+  cmd.parent = this;
+
+  if (desc) return this;
+  return cmd;
+};
+
+/**
+ * Define argument syntax for the top-level command.
+ *
+ * @api public
+ */
+
+Command.prototype.arguments = function(desc) {
+  return this.parseExpectedArgs(desc.split(/ +/));
+};
+
+/**
+ * Add an implicit `help [cmd]` subcommand
+ * which invokes `--help` for the given command.
+ *
+ * @api private
+ */
+
+Command.prototype.addImplicitHelpCommand = function() {
+  this.command('help [cmd]', 'display help for [cmd]');
+};
+
+/**
+ * Parse expected `args`.
+ *
+ * For example `["[type]"]` becomes `[{ required: false, name: 'type' }]`.
+ *
+ * @param {Array} args
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.parseExpectedArgs = function(args) {
+  if (!args.length) return;
+  var self = this;
+  args.forEach(function(arg) {
+    var argDetails = {
+      required: false,
+      name: '',
+      variadic: false
+    };
+
+    switch (arg[0]) {
+      case '<':
+        argDetails.required = true;
+        argDetails.name = arg.slice(1, -1);
+        break;
+      case '[':
+        argDetails.name = arg.slice(1, -1);
+        break;
+    }
+
+    if (argDetails.name.length > 3 && argDetails.name.slice(-3) === '...') {
+      argDetails.variadic = true;
+      argDetails.name = argDetails.name.slice(0, -3);
+    }
+    if (argDetails.name) {
+      self._args.push(argDetails);
+    }
+  });
+  return this;
+};
+
+/**
+ * Register callback `fn` for the command.
+ *
+ * Examples:
+ *
+ *      program
+ *        .command('help')
+ *        .description('display verbose help')
+ *        .action(function() {
+ *           // output help here
+ *        });
+ *
+ * @param {Function} fn
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.action = function(fn) {
+  var self = this;
+  var listener = function(args, unknown) {
+    // Parse any so-far unknown options
+    args = args || [];
+    unknown = unknown || [];
+
+    var parsed = self.parseOptions(unknown);
+
+    // Output help if necessary
+    outputHelpIfNecessary(self, parsed.unknown);
+
+    // If there are still any unknown options, then we simply
+    // die, unless someone asked for help, in which case we give it
+    // to them, and then we die.
+    if (parsed.unknown.length > 0) {
+      self.unknownOption(parsed.unknown[0]);
+    }
+
+    // Leftover arguments need to be pushed back. Fixes issue #56
+    if (parsed.args.length) args = parsed.args.concat(args);
+
+    self._args.forEach(function(arg, i) {
+      if (arg.required && args[i] == null) {
+        self.missingArgument(arg.name);
+      } else if (arg.variadic) {
+        if (i !== self._args.length - 1) {
+          self.variadicArgNotLast(arg.name);
+        }
+
+        args[i] = args.splice(i);
+      }
+    });
+
+    // Always append ourselves to the end of the arguments,
+    // to make sure we match the number of arguments the user
+    // expects
+    if (self._args.length) {
+      args[self._args.length] = self;
+    } else {
+      args.push(self);
+    }
+
+    fn.apply(self, args);
+  };
+  var parent = this.parent || this;
+  var name = parent === this ? '*' : this._name;
+  parent.on('command:' + name, listener);
+  if (this._alias) parent.on('command:' + this._alias, listener);
+  return this;
+};
+
+/**
+ * Define option with `flags`, `description` and optional
+ * coercion `fn`.
+ *
+ * The `flags` string should contain both the short and long flags,
+ * separated by comma, a pipe or space. The following are all valid
+ * all will output this way when `--help` is used.
+ *
+ *    "-p, --pepper"
+ *    "-p|--pepper"
+ *    "-p --pepper"
+ *
+ * Examples:
+ *
+ *     // simple boolean defaulting to false
+ *     program.option('-p, --pepper', 'add pepper');
+ *
+ *     --pepper
+ *     program.pepper
+ *     // => Boolean
+ *
+ *     // simple boolean defaulting to true
+ *     program.option('-C, --no-cheese', 'remove cheese');
+ *
+ *     program.cheese
+ *     // => true
+ *
+ *     --no-cheese
+ *     program.cheese
+ *     // => false
+ *
+ *     // required argument
+ *     program.option('-C, --chdir <path>', 'change the working directory');
+ *
+ *     --chdir /tmp
+ *     program.chdir
+ *     // => "/tmp"
+ *
+ *     // optional argument
+ *     program.option('-c, --cheese [type]', 'add cheese [marble]');
+ *
+ * @param {String} flags
+ * @param {String} description
+ * @param {Function|*} [fn] or default
+ * @param {*} [defaultValue]
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.option = function(flags, description, fn, defaultValue) {
+  var self = this,
+    option = new Option(flags, description),
+    oname = option.name(),
+    name = option.attributeName();
+
+  // default as 3rd arg
+  if (typeof fn !== 'function') {
+    if (fn instanceof RegExp) {
+      var regex = fn;
+      fn = function(val, def) {
+        var m = regex.exec(val);
+        return m ? m[0] : def;
+      };
+    } else {
+      defaultValue = fn;
+      fn = null;
+    }
+  }
+
+  // preassign default value only for --no-*, [optional], or <required>
+  if (!option.bool || option.optional || option.required) {
+    // when --no-* we make sure default is true
+    if (!option.bool) defaultValue = true;
+    // preassign only if we have a default
+    if (defaultValue !== undefined) {
+      self[name] = defaultValue;
+      option.defaultValue = defaultValue;
+    }
+  }
+
+  // register the option
+  this.options.push(option);
+
+  // when it's passed assign the value
+  // and conditionally invoke the callback
+  this.on('option:' + oname, function(val) {
+    // coercion
+    if (val !== null && fn) {
+      val = fn(val, self[name] === undefined ? defaultValue : self[name]);
+    }
+
+    // unassigned or bool
+    if (typeof self[name] === 'boolean' || typeof self[name] === 'undefined') {
+      // if no value, bool true, and we have a default, then use it!
+      if (val == null) {
+        self[name] = option.bool
+          ? defaultValue || true
+          : false;
+      } else {
+        self[name] = val;
+      }
+    } else if (val !== null) {
+      // reassign
+      self[name] = val;
+    }
+  });
+
+  return this;
+};
+
+/**
+ * Allow unknown options on the command line.
+ *
+ * @param {Boolean} arg if `true` or omitted, no error will be thrown
+ * for unknown options.
+ * @api public
+ */
+Command.prototype.allowUnknownOption = function(arg) {
+  this._allowUnknownOption = arguments.length === 0 || arg;
+  return this;
+};
+
+/**
+ * Parse `argv`, settings options and invoking commands when defined.
+ *
+ * @param {Array} argv
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.parse = function(argv) {
+  // implicit help
+  if (this.executables) this.addImplicitHelpCommand();
+
+  // store raw args
+  this.rawArgs = argv;
+
+  // guess name
+  this._name = this._name || basename(argv[1], '.js');
+
+  // github-style sub-commands with no sub-command
+  if (this.executables && argv.length < 3 && !this.defaultExecutable) {
+    // this user needs help
+    argv.push('--help');
+  }
+
+  // process argv
+  var parsed = this.parseOptions(this.normalize(argv.slice(2)));
+  var args = this.args = parsed.args;
+
+  var result = this.parseArgs(this.args, parsed.unknown);
+
+  // executable sub-commands
+  var name = result.args[0];
+
+  var aliasCommand = null;
+  // check alias of sub commands
+  if (name) {
+    aliasCommand = this.commands.filter(function(command) {
+      return command.alias() === name;
+    })[0];
+  }
+
+  if (this._execs[name] === true) {
+    return this.executeSubCommand(argv, args, parsed.unknown);
+  } else if (aliasCommand) {
+    // is alias of a subCommand
+    args[0] = aliasCommand._name;
+    return this.executeSubCommand(argv, args, parsed.unknown);
+  } else if (this.defaultExecutable) {
+    // use the default subcommand
+    args.unshift(this.defaultExecutable);
+    return this.executeSubCommand(argv, args, parsed.unknown);
+  }
+
+  return result;
+};
+
+/**
+ * Execute a sub-command executable.
+ *
+ * @param {Array} argv
+ * @param {Array} args
+ * @param {Array} unknown
+ * @api private
+ */
+
+Command.prototype.executeSubCommand = function(argv, args, unknown) {
+  args = args.concat(unknown);
+
+  if (!args.length) this.help();
+  if (args[0] === 'help' && args.length === 1) this.help();
+
+  // <cmd> --help
+  if (args[0] === 'help') {
+    args[0] = args[1];
+    args[1] = '--help';
+  }
+
+  // executable
+  var f = argv[1];
+  // name of the subcommand, link `pm-install`
+  var bin = basename(f, path.extname(f)) + '-' + args[0];
+
+  // In case of globally installed, get the base dir where executable
+  //  subcommand file should be located at
+  var baseDir;
+
+  var resolvedLink = fs.realpathSync(f);
+
+  baseDir = dirname(resolvedLink);
+
+  // prefer local `./<bin>` to bin in the $PATH
+  var localBin = path.join(baseDir, bin);
+
+  // whether bin file is a js script with explicit `.js` or `.ts` extension
+  var isExplicitJS = false;
+  if (exists(localBin + '.js')) {
+    bin = localBin + '.js';
+    isExplicitJS = true;
+  } else if (exists(localBin + '.ts')) {
+    bin = localBin + '.ts';
+    isExplicitJS = true;
+  } else if (exists(localBin)) {
+    bin = localBin;
+  }
+
+  args = args.slice(1);
+
+  var proc;
+  if (process.platform !== 'win32') {
+    if (isExplicitJS) {
+      args.unshift(bin);
+      // add executable arguments to spawn
+      args = (process.execArgv || []).concat(args);
+
+      proc = spawn(process.argv[0], args, { stdio: 'inherit', customFds: [0, 1, 2] });
+    } else {
+      proc = spawn(bin, args, { stdio: 'inherit', customFds: [0, 1, 2] });
+    }
+  } else {
+    args.unshift(bin);
+    proc = spawn(process.execPath, args, { stdio: 'inherit' });
+  }
+
+  var signals = ['SIGUSR1', 'SIGUSR2', 'SIGTERM', 'SIGINT', 'SIGHUP'];
+  signals.forEach(function(signal) {
+    process.on(signal, function() {
+      if (proc.killed === false && proc.exitCode === null) {
+        proc.kill(signal);
+      }
+    });
+  });
+  proc.on('close', process.exit.bind(process));
+  proc.on('error', function(err) {
+    if (err.code === 'ENOENT') {
+      console.error('error: %s(1) does not exist, try --help', bin);
+    } else if (err.code === 'EACCES') {
+      console.error('error: %s(1) not executable. try chmod or run with root', bin);
+    }
+    process.exit(1);
+  });
+
+  // Store the reference to the child process
+  this.runningCommand = proc;
+};
+
+/**
+ * Normalize `args`, splitting joined short flags. For example
+ * the arg "-abc" is equivalent to "-a -b -c".
+ * This also normalizes equal sign and splits "--abc=def" into "--abc def".
+ *
+ * @param {Array} args
+ * @return {Array}
+ * @api private
+ */
+
+Command.prototype.normalize = function(args) {
+  var ret = [],
+    arg,
+    lastOpt,
+    index;
+
+  for (var i = 0, len = args.length; i < len; ++i) {
+    arg = args[i];
+    if (i > 0) {
+      lastOpt = this.optionFor(args[i - 1]);
+    }
+
+    if (arg === '--') {
+      // Honor option terminator
+      ret = ret.concat(args.slice(i));
+      break;
+    } else if (lastOpt && lastOpt.required) {
+      ret.push(arg);
+    } else if (arg.length > 1 && arg[0] === '-' && arg[1] !== '-') {
+      arg.slice(1).split('').forEach(function(c) {
+        ret.push('-' + c);
+      });
+    } else if (/^--/.test(arg) && ~(index = arg.indexOf('='))) {
+      ret.push(arg.slice(0, index), arg.slice(index + 1));
+    } else {
+      ret.push(arg);
+    }
+  }
+
+  return ret;
+};
+
+/**
+ * Parse command `args`.
+ *
+ * When listener(s) are available those
+ * callbacks are invoked, otherwise the "*"
+ * event is emitted and those actions are invoked.
+ *
+ * @param {Array} args
+ * @return {Command} for chaining
+ * @api private
+ */
+
+Command.prototype.parseArgs = function(args, unknown) {
+  var name;
+
+  if (args.length) {
+    name = args[0];
+    if (this.listeners('command:' + name).length) {
+      this.emit('command:' + args.shift(), args, unknown);
+    } else {
+      this.emit('command:*', args);
+    }
+  } else {
+    outputHelpIfNecessary(this, unknown);
+
+    // If there were no args and we have unknown options,
+    // then they are extraneous and we need to error.
+    if (unknown.length > 0) {
+      this.unknownOption(unknown[0]);
+    }
+    if (this.commands.length === 0 &&
+        this._args.filter(function(a) { return a.required; }).length === 0) {
+      this.emit('command:*');
+    }
+  }
+
+  return this;
+};
+
+/**
+ * Return an option matching `arg` if any.
+ *
+ * @param {String} arg
+ * @return {Option}
+ * @api private
+ */
+
+Command.prototype.optionFor = function(arg) {
+  for (var i = 0, len = this.options.length; i < len; ++i) {
+    if (this.options[i].is(arg)) {
+      return this.options[i];
+    }
+  }
+};
+
+/**
+ * Parse options from `argv` returning `argv`
+ * void of these options.
+ *
+ * @param {Array} argv
+ * @return {Array}
+ * @api public
+ */
+
+Command.prototype.parseOptions = function(argv) {
+  var args = [],
+    len = argv.length,
+    literal,
+    option,
+    arg;
+
+  var unknownOptions = [];
+
+  // parse options
+  for (var i = 0; i < len; ++i) {
+    arg = argv[i];
+
+    // literal args after --
+    if (literal) {
+      args.push(arg);
+      continue;
+    }
+
+    if (arg === '--') {
+      literal = true;
+      continue;
+    }
+
+    // find matching Option
+    option = this.optionFor(arg);
+
+    // option is defined
+    if (option) {
+      // requires arg
+      if (option.required) {
+        arg = argv[++i];
+        if (arg == null) return this.optionMissingArgument(option);
+        this.emit('option:' + option.name(), arg);
+      // optional arg
+      } else if (option.optional) {
+        arg = argv[i + 1];
+        if (arg == null || (arg[0] === '-' && arg !== '-')) {
+          arg = null;
+        } else {
+          ++i;
+        }
+        this.emit('option:' + option.name(), arg);
+      // bool
+      } else {
+        this.emit('option:' + option.name());
+      }
+      continue;
+    }
+
+    // looks like an option
+    if (arg.length > 1 && arg[0] === '-') {
+      unknownOptions.push(arg);
+
+      // If the next argument looks like it might be
+      // an argument for this option, we pass it on.
+      // If it isn't, then it'll simply be ignored
+      if ((i + 1) < argv.length && argv[i + 1][0] !== '-') {
+        unknownOptions.push(argv[++i]);
+      }
+      continue;
+    }
+
+    // arg
+    args.push(arg);
+  }
+
+  return { args: args, unknown: unknownOptions };
+};
+
+/**
+ * Return an object containing options as key-value pairs
+ *
+ * @return {Object}
+ * @api public
+ */
+Command.prototype.opts = function() {
+  var result = {},
+    len = this.options.length;
+
+  for (var i = 0; i < len; i++) {
+    var key = this.options[i].attributeName();
+    result[key] = key === this._versionOptionName ? this._version : this[key];
+  }
+  return result;
+};
+
+/**
+ * Argument `name` is missing.
+ *
+ * @param {String} name
+ * @api private
+ */
+
+Command.prototype.missingArgument = function(name) {
+  console.error("error: missing required argument `%s'", name);
+  process.exit(1);
+};
+
+/**
+ * `Option` is missing an argument, but received `flag` or nothing.
+ *
+ * @param {String} option
+ * @param {String} flag
+ * @api private
+ */
+
+Command.prototype.optionMissingArgument = function(option, flag) {
+  if (flag) {
+    console.error("error: option `%s' argument missing, got `%s'", option.flags, flag);
+  } else {
+    console.error("error: option `%s' argument missing", option.flags);
+  }
+  process.exit(1);
+};
+
+/**
+ * Unknown option `flag`.
+ *
+ * @param {String} flag
+ * @api private
+ */
+
+Command.prototype.unknownOption = function(flag) {
+  if (this._allowUnknownOption) return;
+  console.error("error: unknown option `%s'", flag);
+  process.exit(1);
+};
+
+/**
+ * Variadic argument with `name` is not the last argument as required.
+ *
+ * @param {String} name
+ * @api private
+ */
+
+Command.prototype.variadicArgNotLast = function(name) {
+  console.error("error: variadic arguments must be last `%s'", name);
+  process.exit(1);
+};
+
+/**
+ * Set the program version to `str`.
+ *
+ * This method auto-registers the "-V, --version" flag
+ * which will print the version number when passed.
+ *
+ * @param {String} str
+ * @param {String} [flags]
+ * @return {Command} for chaining
+ * @api public
+ */
+
+Command.prototype.version = function(str, flags) {
+  if (arguments.length === 0) return this._version;
+  this._version = str;
+  flags = flags || '-V, --version';
+  var versionOption = new Option(flags, 'output the version number');
+  this._versionOptionName = versionOption.long.substr(2) || 'version';
+  this.options.push(versionOption);
+  this.on('option:' + this._versionOptionName, function() {
+    process.stdout.write(str + '\n');
+    process.exit(0);
+  });
+  return this;
+};
+
+/**
+ * Set the description to `str`.
+ *
+ * @param {String} str
+ * @param {Object} argsDescription
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.description = function(str, argsDescription) {
+  if (arguments.length === 0) return this._description;
+  this._description = str;
+  this._argsDescription = argsDescription;
+  return this;
+};
+
+/**
+ * Set an alias for the command
+ *
+ * @param {String} alias
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.alias = function(alias) {
+  var command = this;
+  if (this.commands.length !== 0) {
+    command = this.commands[this.commands.length - 1];
+  }
+
+  if (arguments.length === 0) return command._alias;
+
+  if (alias === command._name) throw new Error('Command alias can\'t be the same as its name');
+
+  command._alias = alias;
+  return this;
+};
+
+/**
+ * Set / get the command usage `str`.
+ *
+ * @param {String} str
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.usage = function(str) {
+  var args = this._args.map(function(arg) {
+    return humanReadableArgName(arg);
+  });
+
+  var usage = '[options]' +
+    (this.commands.length ? ' [command]' : '') +
+    (this._args.length ? ' ' + args.join(' ') : '');
+
+  if (arguments.length === 0) return this._usage || usage;
+  this._usage = str;
+
+  return this;
+};
+
+/**
+ * Get or set the name of the command
+ *
+ * @param {String} str
+ * @return {String|Command}
+ * @api public
+ */
+
+Command.prototype.name = function(str) {
+  if (arguments.length === 0) return this._name;
+  this._name = str;
+  return this;
+};
+
+/**
+ * Return prepared commands.
+ *
+ * @return {Array}
+ * @api private
+ */
+
+Command.prototype.prepareCommands = function() {
+  return this.commands.filter(function(cmd) {
+    return !cmd._noHelp;
+  }).map(function(cmd) {
+    var args = cmd._args.map(function(arg) {
+      return humanReadableArgName(arg);
+    }).join(' ');
+
+    return [
+      cmd._name +
+        (cmd._alias ? '|' + cmd._alias : '') +
+        (cmd.options.length ? ' [options]' : '') +
+        (args ? ' ' + args : ''),
+      cmd._description
+    ];
+  });
+};
+
+/**
+ * Return the largest command length.
+ *
+ * @return {Number}
+ * @api private
+ */
+
+Command.prototype.largestCommandLength = function() {
+  var commands = this.prepareCommands();
+  return commands.reduce(function(max, command) {
+    return Math.max(max, command[0].length);
+  }, 0);
+};
+
+/**
+ * Return the largest option length.
+ *
+ * @return {Number}
+ * @api private
+ */
+
+Command.prototype.largestOptionLength = function() {
+  var options = [].slice.call(this.options);
+  options.push({
+    flags: '-h, --help'
+  });
+  return options.reduce(function(max, option) {
+    return Math.max(max, option.flags.length);
+  }, 0);
+};
+
+/**
+ * Return the largest arg length.
+ *
+ * @return {Number}
+ * @api private
+ */
+
+Command.prototype.largestArgLength = function() {
+  return this._args.reduce(function(max, arg) {
+    return Math.max(max, arg.name.length);
+  }, 0);
+};
+
+/**
+ * Return the pad width.
+ *
+ * @return {Number}
+ * @api private
+ */
+
+Command.prototype.padWidth = function() {
+  var width = this.largestOptionLength();
+  if (this._argsDescription && this._args.length) {
+    if (this.largestArgLength() > width) {
+      width = this.largestArgLength();
+    }
+  }
+
+  if (this.commands && this.commands.length) {
+    if (this.largestCommandLength() > width) {
+      width = this.largestCommandLength();
+    }
+  }
+
+  return width;
+};
+
+/**
+ * Return help for options.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Command.prototype.optionHelp = function() {
+  var width = this.padWidth();
+
+  // Append the help information
+  return this.options.map(function(option) {
+    return pad(option.flags, width) + '  ' + option.description +
+      ((option.bool && option.defaultValue !== undefined) ? ' (default: ' + JSON.stringify(option.defaultValue) + ')' : '');
+  }).concat([pad('-h, --help', width) + '  ' + 'output usage information'])
+    .join('\n');
+};
+
+/**
+ * Return command help documentation.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Command.prototype.commandHelp = function() {
+  if (!this.commands.length) return '';
+
+  var commands = this.prepareCommands();
+  var width = this.padWidth();
+
+  return [
+    'Commands:',
+    commands.map(function(cmd) {
+      var desc = cmd[1] ? '  ' + cmd[1] : '';
+      return (desc ? pad(cmd[0], width) : cmd[0]) + desc;
+    }).join('\n').replace(/^/gm, '  '),
+    ''
+  ].join('\n');
+};
+
+/**
+ * Return program help documentation.
+ *
+ * @return {String}
+ * @api private
+ */
+
+Command.prototype.helpInformation = function() {
+  var desc = [];
+  if (this._description) {
+    desc = [
+      this._description,
+      ''
+    ];
+
+    var argsDescription = this._argsDescription;
+    if (argsDescription && this._args.length) {
+      var width = this.padWidth();
+      desc.push('Arguments:');
+      desc.push('');
+      this._args.forEach(function(arg) {
+        desc.push('  ' + pad(arg.name, width) + '  ' + argsDescription[arg.name]);
+      });
+      desc.push('');
+    }
+  }
+
+  var cmdName = this._name;
+  if (this._alias) {
+    cmdName = cmdName + '|' + this._alias;
+  }
+  var usage = [
+    'Usage: ' + cmdName + ' ' + this.usage(),
+    ''
+  ];
+
+  var cmds = [];
+  var commandHelp = this.commandHelp();
+  if (commandHelp) cmds = [commandHelp];
+
+  var options = [
+    'Options:',
+    '' + this.optionHelp().replace(/^/gm, '  '),
+    ''
+  ];
+
+  return usage
+    .concat(desc)
+    .concat(options)
+    .concat(cmds)
+    .join('\n');
+};
+
+/**
+ * Output help information for this command
+ *
+ * @api public
+ */
+
+Command.prototype.outputHelp = function(cb) {
+  if (!cb) {
+    cb = function(passthru) {
+      return passthru;
+    };
+  }
+  process.stdout.write(cb(this.helpInformation()));
+  this.emit('--help');
+};
+
+/**
+ * Output help information and exit.
+ *
+ * @api public
+ */
+
+Command.prototype.help = function(cb) {
+  this.outputHelp(cb);
+  process.exit();
+};
+
+/**
+ * Camel-case the given `flag`
+ *
+ * @param {String} flag
+ * @return {String}
+ * @api private
+ */
+
+function camelcase(flag) {
+  return flag.split('-').reduce(function(str, word) {
+    return str + word[0].toUpperCase() + word.slice(1);
+  });
+}
+
+/**
+ * Pad `str` to `width`.
+ *
+ * @param {String} str
+ * @param {Number} width
+ * @return {String}
+ * @api private
+ */
+
+function pad(str, width) {
+  var len = Math.max(0, width - str.length);
+  return str + Array(len + 1).join(' ');
+}
+
+/**
+ * Output help information if necessary
+ *
+ * @param {Command} command to output help for
+ * @param {Array} array of options to search for -h or --help
+ * @api private
+ */
+
+function outputHelpIfNecessary(cmd, options) {
+  options = options || [];
+  for (var i = 0; i < options.length; i++) {
+    if (options[i] === '--help' || options[i] === '-h') {
+      cmd.outputHelp();
+      process.exit(0);
+    }
+  }
+}
+
+/**
+ * Takes an argument an returns its human readable equivalent for help usage.
+ *
+ * @param {Object} arg
+ * @return {String}
+ * @api private
+ */
+
+function humanReadableArgName(arg) {
+  var nameOutput = arg.name + (arg.variadic === true ? '...' : '');
+
+  return arg.required
+    ? '<' + nameOutput + '>'
+    : '[' + nameOutput + ']';
+}
+
+// for versions before node v0.8 when there weren't `fs.existsSync`
+function exists(file) {
+  try {
+    if (fs.statSync(file).isFile()) {
+      return true;
+    }
+  } catch (e) {
+    return false;
+  }
+}
Index: frontend/node_modules/terser/node_modules/commander/package.json
===================================================================
--- frontend/node_modules/terser/node_modules/commander/package.json	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/node_modules/commander/package.json	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,38 @@
+{
+  "name": "commander",
+  "version": "2.20.3",
+  "description": "the complete solution for node.js command-line programs",
+  "keywords": [
+    "commander",
+    "command",
+    "option",
+    "parser"
+  ],
+  "author": "TJ Holowaychuk <tj@vision-media.ca>",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/tj/commander.js.git"
+  },
+  "scripts": {
+    "lint": "eslint index.js",
+    "test": "node test/run.js && npm run test-typings",
+    "test-typings": "tsc -p tsconfig.json"
+  },
+  "main": "index",
+  "files": [
+    "index.js",
+    "typings/index.d.ts"
+  ],
+  "dependencies": {},
+  "devDependencies": {
+    "@types/node": "^12.7.8",
+    "eslint": "^6.4.0",
+    "should": "^13.2.3",
+    "sinon": "^7.5.0",
+    "standard": "^14.3.1",
+    "ts-node": "^8.4.1",
+    "typescript": "^3.6.3"
+  },
+  "typings": "typings/index.d.ts"
+}
Index: frontend/node_modules/terser/node_modules/commander/typings/index.d.ts
===================================================================
--- frontend/node_modules/terser/node_modules/commander/typings/index.d.ts	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/node_modules/commander/typings/index.d.ts	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,310 @@
+// Type definitions for commander 2.11
+// Project: https://github.com/visionmedia/commander.js
+// Definitions by: Alan Agius <https://github.com/alan-agius4>, Marcelo Dezem <https://github.com/mdezem>, vvakame <https://github.com/vvakame>, Jules Randolph <https://github.com/sveinburne>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare namespace local {
+
+  class Option {
+    flags: string;
+    required: boolean;
+    optional: boolean;
+    bool: boolean;
+    short?: string;
+    long: string;
+    description: string;
+
+    /**
+     * Initialize a new `Option` with the given `flags` and `description`.
+     *
+     * @param {string} flags
+     * @param {string} [description]
+     */
+    constructor(flags: string, description?: string);
+  }
+
+  class Command extends NodeJS.EventEmitter {
+    [key: string]: any;
+
+    args: string[];
+
+    /**
+     * Initialize a new `Command`.
+     *
+     * @param {string} [name]
+     */
+    constructor(name?: string);
+
+    /**
+     * Set the program version to `str`.
+     *
+     * This method auto-registers the "-V, --version" flag
+     * which will print the version number when passed.
+     *
+     * @param {string} str
+     * @param {string} [flags]
+     * @returns {Command} for chaining
+     */
+    version(str: string, flags?: string): Command;
+
+    /**
+     * Add command `name`.
+     *
+     * The `.action()` callback is invoked when the
+     * command `name` is specified via __ARGV__,
+     * and the remaining arguments are applied to the
+     * function for access.
+     *
+     * When the `name` is "*" an un-matched command
+     * will be passed as the first arg, followed by
+     * the rest of __ARGV__ remaining.
+     *
+     * @example
+     *      program
+     *        .version('0.0.1')
+     *        .option('-C, --chdir <path>', 'change the working directory')
+     *        .option('-c, --config <path>', 'set config path. defaults to ./deploy.conf')
+     *        .option('-T, --no-tests', 'ignore test hook')
+     *
+     *      program
+     *        .command('setup')
+     *        .description('run remote setup commands')
+     *        .action(function() {
+     *          console.log('setup');
+     *        });
+     *
+     *      program
+     *        .command('exec <cmd>')
+     *        .description('run the given remote command')
+     *        .action(function(cmd) {
+     *          console.log('exec "%s"', cmd);
+     *        });
+     *
+     *      program
+     *        .command('teardown <dir> [otherDirs...]')
+     *        .description('run teardown commands')
+     *        .action(function(dir, otherDirs) {
+     *          console.log('dir "%s"', dir);
+     *          if (otherDirs) {
+     *            otherDirs.forEach(function (oDir) {
+     *              console.log('dir "%s"', oDir);
+     *            });
+     *          }
+     *        });
+     *
+     *      program
+     *        .command('*')
+     *        .description('deploy the given env')
+     *        .action(function(env) {
+     *          console.log('deploying "%s"', env);
+     *        });
+     *
+     *      program.parse(process.argv);
+     *
+     * @param {string} name
+     * @param {string} [desc] for git-style sub-commands
+     * @param {CommandOptions} [opts] command options
+     * @returns {Command} the new command
+     */
+    command(name: string, desc?: string, opts?: commander.CommandOptions): Command;
+
+    /**
+     * Define argument syntax for the top-level command.
+     *
+     * @param {string} desc
+     * @returns {Command} for chaining
+     */
+    arguments(desc: string): Command;
+
+    /**
+     * Parse expected `args`.
+     *
+     * For example `["[type]"]` becomes `[{ required: false, name: 'type' }]`.
+     *
+     * @param {string[]} args
+     * @returns {Command} for chaining
+     */
+    parseExpectedArgs(args: string[]): Command;
+
+    /**
+     * Register callback `fn` for the command.
+     *
+     * @example
+     *      program
+     *        .command('help')
+     *        .description('display verbose help')
+     *        .action(function() {
+     *           // output help here
+     *        });
+     *
+     * @param {(...args: any[]) => void} fn
+     * @returns {Command} for chaining
+     */
+    action(fn: (...args: any[]) => void): Command;
+
+    /**
+     * Define option with `flags`, `description` and optional
+     * coercion `fn`.
+     *
+     * The `flags` string should contain both the short and long flags,
+     * separated by comma, a pipe or space. The following are all valid
+     * all will output this way when `--help` is used.
+     *
+     *    "-p, --pepper"
+     *    "-p|--pepper"
+     *    "-p --pepper"
+     *
+     * @example
+     *     // simple boolean defaulting to false
+     *     program.option('-p, --pepper', 'add pepper');
+     *
+     *     --pepper
+     *     program.pepper
+     *     // => Boolean
+     *
+     *     // simple boolean defaulting to true
+     *     program.option('-C, --no-cheese', 'remove cheese');
+     *
+     *     program.cheese
+     *     // => true
+     *
+     *     --no-cheese
+     *     program.cheese
+     *     // => false
+     *
+     *     // required argument
+     *     program.option('-C, --chdir <path>', 'change the working directory');
+     *
+     *     --chdir /tmp
+     *     program.chdir
+     *     // => "/tmp"
+     *
+     *     // optional argument
+     *     program.option('-c, --cheese [type]', 'add cheese [marble]');
+     *
+     * @param {string} flags
+     * @param {string} [description]
+     * @param {((arg1: any, arg2: any) => void) | RegExp} [fn] function or default
+     * @param {*} [defaultValue]
+     * @returns {Command} for chaining
+     */
+    option(flags: string, description?: string, fn?: ((arg1: any, arg2: any) => void) | RegExp, defaultValue?: any): Command;
+    option(flags: string, description?: string, defaultValue?: any): Command;
+
+    /**
+     * Allow unknown options on the command line.
+     *
+     * @param {boolean} [arg] if `true` or omitted, no error will be thrown for unknown options.
+     * @returns {Command} for chaining
+     */
+    allowUnknownOption(arg?: boolean): Command;
+
+    /**
+     * Parse `argv`, settings options and invoking commands when defined.
+     *
+     * @param {string[]} argv
+     * @returns {Command} for chaining
+     */
+    parse(argv: string[]): Command;
+
+    /**
+     * Parse options from `argv` returning `argv` void of these options.
+     *
+     * @param {string[]} argv
+     * @returns {ParseOptionsResult}
+     */
+    parseOptions(argv: string[]): commander.ParseOptionsResult;
+
+    /**
+     * Return an object containing options as key-value pairs
+     *
+     * @returns {{[key: string]: any}}
+     */
+    opts(): { [key: string]: any };
+
+    /**
+     * Set the description to `str`.
+     *
+     * @param {string} str
+     * @param {{[argName: string]: string}} argsDescription
+     * @return {(Command | string)}
+     */
+    description(str: string, argsDescription?: {[argName: string]: string}): Command;
+    description(): string;
+
+    /**
+     * Set an alias for the command.
+     *
+     * @param {string} alias
+     * @return {(Command | string)}
+     */
+    alias(alias: string): Command;
+    alias(): string;
+
+    /**
+     * Set or get the command usage.
+     *
+     * @param {string} str
+     * @return {(Command | string)}
+     */
+    usage(str: string): Command;
+    usage(): string;
+
+    /**
+     * Set the name of the command.
+     *
+     * @param {string} str
+     * @return {Command}
+     */
+    name(str: string): Command;
+
+    /**
+     * Get the name of the command.
+     *
+     * @return {string}
+     */
+    name(): string;
+
+    /**
+     * Output help information for this command.
+     *
+     * @param {(str: string) => string} [cb]
+     */
+    outputHelp(cb?: (str: string) => string): void;
+
+    /** Output help information and exit.
+     *
+     * @param {(str: string) => string} [cb]
+     */
+    help(cb?: (str: string) => string): never;
+  }
+
+}
+
+declare namespace commander {
+
+    type Command = local.Command
+
+    type Option = local.Option
+
+    interface CommandOptions {
+        noHelp?: boolean;
+        isDefault?: boolean;
+    }
+
+    interface ParseOptionsResult {
+        args: string[];
+        unknown: string[];
+    }
+
+    interface CommanderStatic extends Command {
+        Command: typeof local.Command;
+        Option: typeof local.Option;
+        CommandOptions: CommandOptions;
+        ParseOptionsResult: ParseOptionsResult;
+    }
+
+}
+
+declare const commander: commander.CommanderStatic;
+export = commander;
Index: frontend/node_modules/terser/package.json
===================================================================
--- frontend/node_modules/terser/package.json	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/package.json	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,158 @@
+{
+  "name": "terser",
+  "description": "JavaScript parser, mangler/compressor and beautifier toolkit for ES6+",
+  "homepage": "https://terser.org",
+  "author": "Mihai Bazon <mihai.bazon@gmail.com> (http://lisperator.net/)",
+  "license": "BSD-2-Clause",
+  "version": "5.48.0",
+  "engines": {
+    "node": ">=10"
+  },
+  "maintainers": [
+    "Fábio Santos <fabiosantosart@gmail.com>"
+  ],
+  "repository": "https://github.com/terser/terser",
+  "main": "dist/bundle.min.js",
+  "type": "module",
+  "module": "./main.js",
+  "exports": {
+    ".": [
+      {
+        "types": "./tools/terser.d.ts",
+        "import": "./main.js",
+        "require": "./dist/bundle.min.js"
+      },
+      "./dist/bundle.min.js"
+    ],
+    "./package": "./package.json",
+    "./package.json": "./package.json",
+    "./bin/terser": "./bin/terser"
+  },
+  "types": "tools/terser.d.ts",
+  "bin": {
+    "terser": "bin/terser"
+  },
+  "files": [
+    "bin",
+    "dist",
+    "lib",
+    "tools",
+    "LICENSE",
+    "README.md",
+    "CHANGELOG.md",
+    "PATRONS.md",
+    "main.js"
+  ],
+  "dependencies": {
+    "@jridgewell/source-map": "^0.3.3",
+    "acorn": "^8.15.0",
+    "commander": "^2.20.0",
+    "source-map-support": "~0.5.20"
+  },
+  "devDependencies": {
+    "@ls-lint/ls-lint": "^1.11.2",
+    "astring": "^1.8.5",
+    "eslint": "^7.32.0",
+    "eslump": "^3.0.0",
+    "esm": "^3.2.25",
+    "mocha": "^9.2.0",
+    "pre-commit": "^1.2.2",
+    "rollup": "^2.79.2",
+    "semver": "^7.5.1",
+    "source-map": "~0.8.0-beta.0"
+  },
+  "overrides": {
+    "serialize-javascript": "6.0.2",
+    "js-yaml": "4.1.1"
+  },
+  "scripts": {
+    "test": "node test/compress.js && mocha test/mocha",
+    "test:compress": "node test/compress.js",
+    "test:mocha": "mocha test/mocha",
+    "lint": "eslint lib",
+    "lint-fix": "eslint --fix lib",
+    "ls-lint": "ls-lint",
+    "build": "rollup --config --silent",
+    "prepare": "npm run build",
+    "postversion": "echo 'Remember to update the changelog!'"
+  },
+  "keywords": [
+    "uglify",
+    "terser",
+    "uglify-es",
+    "uglify-js",
+    "minify",
+    "minifier",
+    "javascript",
+    "ecmascript",
+    "es5",
+    "es6",
+    "es7",
+    "es8",
+    "es2015",
+    "es2016",
+    "es2017",
+    "async",
+    "await"
+  ],
+  "eslintConfig": {
+    "parserOptions": {
+      "sourceType": "module",
+      "ecmaVersion": 2020
+    },
+    "env": {
+      "node": true,
+      "browser": true,
+      "es2020": true
+    },
+    "globals": {
+      "describe": false,
+      "it": false,
+      "require": false,
+      "before": false,
+      "after": false,
+      "global": false,
+      "process": false
+    },
+    "rules": {
+      "brace-style": [
+        "error",
+        "1tbs",
+        {
+          "allowSingleLine": true
+        }
+      ],
+      "quotes": [
+        "error",
+        "double",
+        "avoid-escape"
+      ],
+      "no-debugger": "error",
+      "no-undef": "error",
+      "no-unused-vars": [
+        "error",
+        {
+          "varsIgnorePattern": "^_",
+          "argsIgnorePattern": "^_"
+        }
+      ],
+      "no-tabs": "error",
+      "semi": [
+        "error",
+        "always"
+      ],
+      "no-extra-semi": "error",
+      "no-irregular-whitespace": "error",
+      "space-before-blocks": [
+        "error",
+        "always"
+      ]
+    }
+  },
+  "pre-commit": [
+    "build",
+    "lint-fix",
+    "ls-lint",
+    "test"
+  ]
+}
Index: frontend/node_modules/terser/tools/domprops.js
===================================================================
--- frontend/node_modules/terser/tools/domprops.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/tools/domprops.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,9225 @@
+export var domprops = [
+    "$&",
+    "$'",
+    "$*",
+    "$+",
+    "$1",
+    "$2",
+    "$3",
+    "$4",
+    "$5",
+    "$6",
+    "$7",
+    "$8",
+    "$9",
+    "$_",
+    "$`",
+    "$input",
+    "-moz-animation",
+    "-moz-animation-delay",
+    "-moz-animation-direction",
+    "-moz-animation-duration",
+    "-moz-animation-fill-mode",
+    "-moz-animation-iteration-count",
+    "-moz-animation-name",
+    "-moz-animation-play-state",
+    "-moz-animation-timing-function",
+    "-moz-appearance",
+    "-moz-backface-visibility",
+    "-moz-border-end",
+    "-moz-border-end-color",
+    "-moz-border-end-style",
+    "-moz-border-end-width",
+    "-moz-border-image",
+    "-moz-border-start",
+    "-moz-border-start-color",
+    "-moz-border-start-style",
+    "-moz-border-start-width",
+    "-moz-box-align",
+    "-moz-box-direction",
+    "-moz-box-flex",
+    "-moz-box-ordinal-group",
+    "-moz-box-orient",
+    "-moz-box-pack",
+    "-moz-box-sizing",
+    "-moz-float-edge",
+    "-moz-font-feature-settings",
+    "-moz-font-language-override",
+    "-moz-force-broken-image-icon",
+    "-moz-hyphens",
+    "-moz-image-region",
+    "-moz-margin-end",
+    "-moz-margin-start",
+    "-moz-orient",
+    "-moz-osx-font-smoothing",
+    "-moz-outline-radius",
+    "-moz-outline-radius-bottomleft",
+    "-moz-outline-radius-bottomright",
+    "-moz-outline-radius-topleft",
+    "-moz-outline-radius-topright",
+    "-moz-padding-end",
+    "-moz-padding-start",
+    "-moz-perspective",
+    "-moz-perspective-origin",
+    "-moz-tab-size",
+    "-moz-text-size-adjust",
+    "-moz-transform",
+    "-moz-transform-origin",
+    "-moz-transform-style",
+    "-moz-transition",
+    "-moz-transition-delay",
+    "-moz-transition-duration",
+    "-moz-transition-property",
+    "-moz-transition-timing-function",
+    "-moz-user-focus",
+    "-moz-user-input",
+    "-moz-user-modify",
+    "-moz-user-select",
+    "-moz-window-dragging",
+    "-webkit-align-content",
+    "-webkit-align-items",
+    "-webkit-align-self",
+    "-webkit-animation",
+    "-webkit-animation-delay",
+    "-webkit-animation-direction",
+    "-webkit-animation-duration",
+    "-webkit-animation-fill-mode",
+    "-webkit-animation-iteration-count",
+    "-webkit-animation-name",
+    "-webkit-animation-play-state",
+    "-webkit-animation-timing-function",
+    "-webkit-appearance",
+    "-webkit-backface-visibility",
+    "-webkit-background-clip",
+    "-webkit-background-origin",
+    "-webkit-background-size",
+    "-webkit-border-bottom-left-radius",
+    "-webkit-border-bottom-right-radius",
+    "-webkit-border-image",
+    "-webkit-border-radius",
+    "-webkit-border-top-left-radius",
+    "-webkit-border-top-right-radius",
+    "-webkit-box-align",
+    "-webkit-box-direction",
+    "-webkit-box-flex",
+    "-webkit-box-ordinal-group",
+    "-webkit-box-orient",
+    "-webkit-box-pack",
+    "-webkit-box-shadow",
+    "-webkit-box-sizing",
+    "-webkit-clip-path",
+    "-webkit-filter",
+    "-webkit-flex",
+    "-webkit-flex-basis",
+    "-webkit-flex-direction",
+    "-webkit-flex-flow",
+    "-webkit-flex-grow",
+    "-webkit-flex-shrink",
+    "-webkit-flex-wrap",
+    "-webkit-font-feature-settings",
+    "-webkit-justify-content",
+    "-webkit-line-clamp",
+    "-webkit-mask",
+    "-webkit-mask-clip",
+    "-webkit-mask-composite",
+    "-webkit-mask-image",
+    "-webkit-mask-origin",
+    "-webkit-mask-position",
+    "-webkit-mask-position-x",
+    "-webkit-mask-position-y",
+    "-webkit-mask-repeat",
+    "-webkit-mask-size",
+    "-webkit-order",
+    "-webkit-perspective",
+    "-webkit-perspective-origin",
+    "-webkit-text-fill-color",
+    "-webkit-text-security",
+    "-webkit-text-size-adjust",
+    "-webkit-text-stroke",
+    "-webkit-text-stroke-color",
+    "-webkit-text-stroke-width",
+    "-webkit-transform",
+    "-webkit-transform-origin",
+    "-webkit-transform-style",
+    "-webkit-transition",
+    "-webkit-transition-delay",
+    "-webkit-transition-duration",
+    "-webkit-transition-property",
+    "-webkit-transition-timing-function",
+    "-webkit-user-select",
+    "@@iterator",
+    "ABORT_ERR",
+    "ACTIVE",
+    "ACTIVE_ATTRIBUTES",
+    "ACTIVE_TEXTURE",
+    "ACTIVE_UNIFORMS",
+    "ACTIVE_UNIFORM_BLOCKS",
+    "ADDITION",
+    "ALIASED_LINE_WIDTH_RANGE",
+    "ALIASED_POINT_SIZE_RANGE",
+    "ALL",
+    "ALLOW_KEYBOARD_INPUT",
+    "ALLPASS",
+    "ALPHA",
+    "ALPHA_BITS",
+    "ALREADY_SIGNALED",
+    "ALT_MASK",
+    "ALWAYS",
+    "ANY_SAMPLES_PASSED",
+    "ANY_SAMPLES_PASSED_CONSERVATIVE",
+    "ANY_TYPE",
+    "ANY_UNORDERED_NODE_TYPE",
+    "ARRAY_BUFFER",
+    "ARRAY_BUFFER_BINDING",
+    "ATTACHED_SHADERS",
+    "ATTRIBUTE_NODE",
+    "AT_TARGET",
+    "AbortController",
+    "AbortSignal",
+    "AbsoluteOrientationSensor",
+    "AbstractRange",
+    "Accelerometer",
+    "AddSearchProvider",
+    "AggregateError",
+    "AnalyserNode",
+    "Animation",
+    "AnimationEffect",
+    "AnimationEvent",
+    "AnimationPlaybackEvent",
+    "AnimationTimeline",
+    "AnonXMLHttpRequest",
+    "Any",
+    "AnyPermissions",
+    "ApplicationCache",
+    "ApplicationCacheErrorEvent",
+    "Array",
+    "ArrayBuffer",
+    "ArrayType",
+    "AsyncDisposableStack",
+    "Atomics",
+    "Attr",
+    "Audio",
+    "AudioBuffer",
+    "AudioBufferSourceNode",
+    "AudioContext",
+    "AudioData",
+    "AudioDecoder",
+    "AudioDestinationNode",
+    "AudioEncoder",
+    "AudioListener",
+    "AudioNode",
+    "AudioParam",
+    "AudioParamMap",
+    "AudioProcessingEvent",
+    "AudioScheduledSourceNode",
+    "AudioSinkInfo",
+    "AudioStreamTrack",
+    "AudioWorklet",
+    "AudioWorkletNode",
+    "AuthenticatorAssertionResponse",
+    "AuthenticatorAttestationResponse",
+    "AuthenticatorResponse",
+    "AutocompleteErrorEvent",
+    "BACK",
+    "BAD_BOUNDARYPOINTS_ERR",
+    "BAD_REQUEST",
+    "BANDPASS",
+    "BLEND",
+    "BLEND_COLOR",
+    "BLEND_DST_ALPHA",
+    "BLEND_DST_RGB",
+    "BLEND_EQUATION",
+    "BLEND_EQUATION_ALPHA",
+    "BLEND_EQUATION_RGB",
+    "BLEND_SRC_ALPHA",
+    "BLEND_SRC_RGB",
+    "BLUE",
+    "BLUE_BITS",
+    "BLUR",
+    "BOOL",
+    "BOOLEAN_TYPE",
+    "BOOL_VEC2",
+    "BOOL_VEC3",
+    "BOOL_VEC4",
+    "BOTH",
+    "BROWSER_DEFAULT_WEBGL",
+    "BUBBLING_PHASE",
+    "BUFFER_SIZE",
+    "BUFFER_USAGE",
+    "BYTE",
+    "BYTES_PER_ELEMENT",
+    "BackgroundFetchManager",
+    "BackgroundFetchRecord",
+    "BackgroundFetchRegistration",
+    "BarProp",
+    "BarcodeDetector",
+    "BaseAudioContext",
+    "BaseHref",
+    "BatteryManager",
+    "BeforeInstallPromptEvent",
+    "BeforeLoadEvent",
+    "BeforeUnloadEvent",
+    "BigInt",
+    "BigInt64Array",
+    "BigUint64Array",
+    "BiquadFilterNode",
+    "Blob",
+    "BlobEvent",
+    "Bluetooth",
+    "BluetoothCharacteristicProperties",
+    "BluetoothDevice",
+    "BluetoothRemoteGATTCharacteristic",
+    "BluetoothRemoteGATTDescriptor",
+    "BluetoothRemoteGATTServer",
+    "BluetoothRemoteGATTService",
+    "BluetoothUUID",
+    "Boolean",
+    "BroadcastChannel",
+    "BrowserCaptureMediaStreamTrack",
+    "BrowserInfo",
+    "ByteLengthQueuingStrategy",
+    "CAPTURING_PHASE",
+    "CCW",
+    "CDATASection",
+    "CDATA_SECTION_NODE",
+    "CHANGE",
+    "CHARSET_RULE",
+    "CHECKING",
+    "CLAMP_TO_EDGE",
+    "CLICK",
+    "CLOSED",
+    "CLOSING",
+    "COLOR",
+    "COLOR_ATTACHMENT0",
+    "COLOR_ATTACHMENT1",
+    "COLOR_ATTACHMENT10",
+    "COLOR_ATTACHMENT11",
+    "COLOR_ATTACHMENT12",
+    "COLOR_ATTACHMENT13",
+    "COLOR_ATTACHMENT14",
+    "COLOR_ATTACHMENT15",
+    "COLOR_ATTACHMENT2",
+    "COLOR_ATTACHMENT3",
+    "COLOR_ATTACHMENT4",
+    "COLOR_ATTACHMENT5",
+    "COLOR_ATTACHMENT6",
+    "COLOR_ATTACHMENT7",
+    "COLOR_ATTACHMENT8",
+    "COLOR_ATTACHMENT9",
+    "COLOR_BUFFER_BIT",
+    "COLOR_CLEAR_VALUE",
+    "COLOR_WRITEMASK",
+    "COMMENT_NODE",
+    "COMPARE_REF_TO_TEXTURE",
+    "COMPILE_STATUS",
+    "COMPLETION_STATUS_KHR",
+    "COMPRESSED_RGBA_S3TC_DXT1_EXT",
+    "COMPRESSED_RGBA_S3TC_DXT3_EXT",
+    "COMPRESSED_RGBA_S3TC_DXT5_EXT",
+    "COMPRESSED_RGB_S3TC_DXT1_EXT",
+    "COMPRESSED_TEXTURE_FORMATS",
+    "COMPUTE",
+    "CONDITION_SATISFIED",
+    "CONFIGURATION_UNSUPPORTED",
+    "CONNECTING",
+    "CONSTANT_ALPHA",
+    "CONSTANT_COLOR",
+    "CONSTRAINT_ERR",
+    "CONTEXT_LOST_WEBGL",
+    "CONTROL_MASK",
+    "COPY_DST",
+    "COPY_READ_BUFFER",
+    "COPY_READ_BUFFER_BINDING",
+    "COPY_SRC",
+    "COPY_WRITE_BUFFER",
+    "COPY_WRITE_BUFFER_BINDING",
+    "COUNTER_STYLE_RULE",
+    "CSPViolationReportBody",
+    "CSS",
+    "CSS2Properties",
+    "CSSAnimation",
+    "CSSCharsetRule",
+    "CSSConditionRule",
+    "CSSContainerRule",
+    "CSSCounterStyleRule",
+    "CSSFontFaceRule",
+    "CSSFontFeatureValuesRule",
+    "CSSFontPaletteValuesRule",
+    "CSSFunctionDeclarations",
+    "CSSFunctionDescriptors",
+    "CSSFunctionRule",
+    "CSSGroupingRule",
+    "CSSImageValue",
+    "CSSImportRule",
+    "CSSKeyframeRule",
+    "CSSKeyframesRule",
+    "CSSKeywordValue",
+    "CSSLayerBlockRule",
+    "CSSLayerStatementRule",
+    "CSSMarginRule",
+    "CSSMathClamp",
+    "CSSMathInvert",
+    "CSSMathMax",
+    "CSSMathMin",
+    "CSSMathNegate",
+    "CSSMathProduct",
+    "CSSMathSum",
+    "CSSMathValue",
+    "CSSMatrixComponent",
+    "CSSMediaRule",
+    "CSSMozDocumentRule",
+    "CSSNameSpaceRule",
+    "CSSNamespaceRule",
+    "CSSNestedDeclarations",
+    "CSSNumericArray",
+    "CSSNumericValue",
+    "CSSPageDescriptors",
+    "CSSPageRule",
+    "CSSPerspective",
+    "CSSPositionTryDescriptors",
+    "CSSPositionTryRule",
+    "CSSPositionValue",
+    "CSSPrimitiveValue",
+    "CSSPropertyRule",
+    "CSSRotate",
+    "CSSRule",
+    "CSSRuleList",
+    "CSSScale",
+    "CSSScopeRule",
+    "CSSSkew",
+    "CSSSkewX",
+    "CSSSkewY",
+    "CSSStartingStyleRule",
+    "CSSStyleDeclaration",
+    "CSSStyleProperties",
+    "CSSStyleRule",
+    "CSSStyleSheet",
+    "CSSStyleValue",
+    "CSSSupportsRule",
+    "CSSTransformComponent",
+    "CSSTransformValue",
+    "CSSTransition",
+    "CSSTranslate",
+    "CSSUnitValue",
+    "CSSUnknownRule",
+    "CSSUnparsedValue",
+    "CSSValue",
+    "CSSValueList",
+    "CSSVariableReferenceValue",
+    "CSSVariablesDeclaration",
+    "CSSVariablesRule",
+    "CSSViewTransitionRule",
+    "CSSViewportRule",
+    "CSS_ATTR",
+    "CSS_CM",
+    "CSS_COUNTER",
+    "CSS_CUSTOM",
+    "CSS_DEG",
+    "CSS_DIMENSION",
+    "CSS_EMS",
+    "CSS_EXS",
+    "CSS_FILTER_BLUR",
+    "CSS_FILTER_BRIGHTNESS",
+    "CSS_FILTER_CONTRAST",
+    "CSS_FILTER_CUSTOM",
+    "CSS_FILTER_DROP_SHADOW",
+    "CSS_FILTER_GRAYSCALE",
+    "CSS_FILTER_HUE_ROTATE",
+    "CSS_FILTER_INVERT",
+    "CSS_FILTER_OPACITY",
+    "CSS_FILTER_REFERENCE",
+    "CSS_FILTER_SATURATE",
+    "CSS_FILTER_SEPIA",
+    "CSS_GRAD",
+    "CSS_HZ",
+    "CSS_IDENT",
+    "CSS_IN",
+    "CSS_INHERIT",
+    "CSS_KHZ",
+    "CSS_MATRIX",
+    "CSS_MATRIX3D",
+    "CSS_MM",
+    "CSS_MS",
+    "CSS_NUMBER",
+    "CSS_PC",
+    "CSS_PERCENTAGE",
+    "CSS_PERSPECTIVE",
+    "CSS_PRIMITIVE_VALUE",
+    "CSS_PT",
+    "CSS_PX",
+    "CSS_RAD",
+    "CSS_RECT",
+    "CSS_RGBCOLOR",
+    "CSS_ROTATE",
+    "CSS_ROTATE3D",
+    "CSS_ROTATEX",
+    "CSS_ROTATEY",
+    "CSS_ROTATEZ",
+    "CSS_S",
+    "CSS_SCALE",
+    "CSS_SCALE3D",
+    "CSS_SCALEX",
+    "CSS_SCALEY",
+    "CSS_SCALEZ",
+    "CSS_SKEW",
+    "CSS_SKEWX",
+    "CSS_SKEWY",
+    "CSS_STRING",
+    "CSS_TRANSLATE",
+    "CSS_TRANSLATE3D",
+    "CSS_TRANSLATEX",
+    "CSS_TRANSLATEY",
+    "CSS_TRANSLATEZ",
+    "CSS_UNKNOWN",
+    "CSS_URI",
+    "CSS_VALUE_LIST",
+    "CSS_VH",
+    "CSS_VMAX",
+    "CSS_VMIN",
+    "CSS_VW",
+    "CULL_FACE",
+    "CULL_FACE_MODE",
+    "CURRENT_PROGRAM",
+    "CURRENT_QUERY",
+    "CURRENT_VERTEX_ATTRIB",
+    "CUSTOM",
+    "CW",
+    "Cache",
+    "CacheStorage",
+    "CanvasCaptureMediaStream",
+    "CanvasCaptureMediaStreamTrack",
+    "CanvasGradient",
+    "CanvasPattern",
+    "CanvasRenderingContext2D",
+    "CaptureController",
+    "CaretPosition",
+    "ChannelMergerNode",
+    "ChannelSplitterNode",
+    "ChapterInformation",
+    "CharacterBoundsUpdateEvent",
+    "CharacterData",
+    "ClientRect",
+    "ClientRectList",
+    "Clipboard",
+    "ClipboardEvent",
+    "ClipboardItem",
+    "CloseEvent",
+    "CloseWatcher",
+    "Collator",
+    "ColorArray",
+    "ColorValue",
+    "CommandEvent",
+    "Comment",
+    "CompileError",
+    "CompositionEvent",
+    "CompressionStream",
+    "Console",
+    "ConstantSourceNode",
+    "ContentVisibilityAutoStateChangeEvent",
+    "ContextFilter",
+    "ContextType",
+    "Controllers",
+    "ConvolverNode",
+    "CookieChangeEvent",
+    "CookieStore",
+    "CookieStoreManager",
+    "CountQueuingStrategy",
+    "Counter",
+    "CreateMonitor",
+    "CreateType",
+    "Credential",
+    "CredentialsContainer",
+    "CropTarget",
+    "Crypto",
+    "CryptoKey",
+    "CustomElementRegistry",
+    "CustomEvent",
+    "CustomStateSet",
+    "DATABASE_ERR",
+    "DATA_CLONE_ERR",
+    "DATA_ERR",
+    "DBLCLICK",
+    "DECR",
+    "DECR_WRAP",
+    "DELETE_STATUS",
+    "DEPTH",
+    "DEPTH24_STENCIL8",
+    "DEPTH32F_STENCIL8",
+    "DEPTH_ATTACHMENT",
+    "DEPTH_BITS",
+    "DEPTH_BUFFER_BIT",
+    "DEPTH_CLEAR_VALUE",
+    "DEPTH_COMPONENT",
+    "DEPTH_COMPONENT16",
+    "DEPTH_COMPONENT24",
+    "DEPTH_COMPONENT32F",
+    "DEPTH_FUNC",
+    "DEPTH_RANGE",
+    "DEPTH_STENCIL",
+    "DEPTH_STENCIL_ATTACHMENT",
+    "DEPTH_TEST",
+    "DEPTH_WRITEMASK",
+    "DEVICE_INELIGIBLE",
+    "DIRECTION_DOWN",
+    "DIRECTION_LEFT",
+    "DIRECTION_RIGHT",
+    "DIRECTION_UP",
+    "DISABLED",
+    "DISPATCH_REQUEST_ERR",
+    "DITHER",
+    "DOCUMENT_FRAGMENT_NODE",
+    "DOCUMENT_NODE",
+    "DOCUMENT_POSITION_CONTAINED_BY",
+    "DOCUMENT_POSITION_CONTAINS",
+    "DOCUMENT_POSITION_DISCONNECTED",
+    "DOCUMENT_POSITION_FOLLOWING",
+    "DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC",
+    "DOCUMENT_POSITION_PRECEDING",
+    "DOCUMENT_TYPE_NODE",
+    "DOMCursor",
+    "DOMError",
+    "DOMException",
+    "DOMImplementation",
+    "DOMImplementationLS",
+    "DOMMatrix",
+    "DOMMatrixReadOnly",
+    "DOMParser",
+    "DOMPoint",
+    "DOMPointReadOnly",
+    "DOMQuad",
+    "DOMRect",
+    "DOMRectList",
+    "DOMRectReadOnly",
+    "DOMRequest",
+    "DOMSTRING_SIZE_ERR",
+    "DOMSettableTokenList",
+    "DOMStringList",
+    "DOMStringMap",
+    "DOMTokenList",
+    "DOMTransactionEvent",
+    "DOM_DELTA_LINE",
+    "DOM_DELTA_PAGE",
+    "DOM_DELTA_PIXEL",
+    "DOM_INPUT_METHOD_DROP",
+    "DOM_INPUT_METHOD_HANDWRITING",
+    "DOM_INPUT_METHOD_IME",
+    "DOM_INPUT_METHOD_KEYBOARD",
+    "DOM_INPUT_METHOD_MULTIMODAL",
+    "DOM_INPUT_METHOD_OPTION",
+    "DOM_INPUT_METHOD_PASTE",
+    "DOM_INPUT_METHOD_SCRIPT",
+    "DOM_INPUT_METHOD_UNKNOWN",
+    "DOM_INPUT_METHOD_VOICE",
+    "DOM_KEY_LOCATION_JOYSTICK",
+    "DOM_KEY_LOCATION_LEFT",
+    "DOM_KEY_LOCATION_MOBILE",
+    "DOM_KEY_LOCATION_NUMPAD",
+    "DOM_KEY_LOCATION_RIGHT",
+    "DOM_KEY_LOCATION_STANDARD",
+    "DOM_VK_0",
+    "DOM_VK_1",
+    "DOM_VK_2",
+    "DOM_VK_3",
+    "DOM_VK_4",
+    "DOM_VK_5",
+    "DOM_VK_6",
+    "DOM_VK_7",
+    "DOM_VK_8",
+    "DOM_VK_9",
+    "DOM_VK_A",
+    "DOM_VK_ACCEPT",
+    "DOM_VK_ADD",
+    "DOM_VK_ALT",
+    "DOM_VK_ALTGR",
+    "DOM_VK_AMPERSAND",
+    "DOM_VK_ASTERISK",
+    "DOM_VK_AT",
+    "DOM_VK_ATTN",
+    "DOM_VK_B",
+    "DOM_VK_BACKSPACE",
+    "DOM_VK_BACK_QUOTE",
+    "DOM_VK_BACK_SLASH",
+    "DOM_VK_BACK_SPACE",
+    "DOM_VK_C",
+    "DOM_VK_CANCEL",
+    "DOM_VK_CAPS_LOCK",
+    "DOM_VK_CIRCUMFLEX",
+    "DOM_VK_CLEAR",
+    "DOM_VK_CLOSE_BRACKET",
+    "DOM_VK_CLOSE_CURLY_BRACKET",
+    "DOM_VK_CLOSE_PAREN",
+    "DOM_VK_COLON",
+    "DOM_VK_COMMA",
+    "DOM_VK_CONTEXT_MENU",
+    "DOM_VK_CONTROL",
+    "DOM_VK_CONVERT",
+    "DOM_VK_CRSEL",
+    "DOM_VK_CTRL",
+    "DOM_VK_D",
+    "DOM_VK_DECIMAL",
+    "DOM_VK_DELETE",
+    "DOM_VK_DIVIDE",
+    "DOM_VK_DOLLAR",
+    "DOM_VK_DOUBLE_QUOTE",
+    "DOM_VK_DOWN",
+    "DOM_VK_E",
+    "DOM_VK_EISU",
+    "DOM_VK_END",
+    "DOM_VK_ENTER",
+    "DOM_VK_EQUALS",
+    "DOM_VK_EREOF",
+    "DOM_VK_ESCAPE",
+    "DOM_VK_EXCLAMATION",
+    "DOM_VK_EXECUTE",
+    "DOM_VK_EXSEL",
+    "DOM_VK_F",
+    "DOM_VK_F1",
+    "DOM_VK_F10",
+    "DOM_VK_F11",
+    "DOM_VK_F12",
+    "DOM_VK_F13",
+    "DOM_VK_F14",
+    "DOM_VK_F15",
+    "DOM_VK_F16",
+    "DOM_VK_F17",
+    "DOM_VK_F18",
+    "DOM_VK_F19",
+    "DOM_VK_F2",
+    "DOM_VK_F20",
+    "DOM_VK_F21",
+    "DOM_VK_F22",
+    "DOM_VK_F23",
+    "DOM_VK_F24",
+    "DOM_VK_F25",
+    "DOM_VK_F26",
+    "DOM_VK_F27",
+    "DOM_VK_F28",
+    "DOM_VK_F29",
+    "DOM_VK_F3",
+    "DOM_VK_F30",
+    "DOM_VK_F31",
+    "DOM_VK_F32",
+    "DOM_VK_F33",
+    "DOM_VK_F34",
+    "DOM_VK_F35",
+    "DOM_VK_F36",
+    "DOM_VK_F4",
+    "DOM_VK_F5",
+    "DOM_VK_F6",
+    "DOM_VK_F7",
+    "DOM_VK_F8",
+    "DOM_VK_F9",
+    "DOM_VK_FINAL",
+    "DOM_VK_FRONT",
+    "DOM_VK_G",
+    "DOM_VK_GREATER_THAN",
+    "DOM_VK_H",
+    "DOM_VK_HANGUL",
+    "DOM_VK_HANJA",
+    "DOM_VK_HASH",
+    "DOM_VK_HELP",
+    "DOM_VK_HK_TOGGLE",
+    "DOM_VK_HOME",
+    "DOM_VK_HYPHEN_MINUS",
+    "DOM_VK_I",
+    "DOM_VK_INSERT",
+    "DOM_VK_J",
+    "DOM_VK_JUNJA",
+    "DOM_VK_K",
+    "DOM_VK_KANA",
+    "DOM_VK_KANJI",
+    "DOM_VK_L",
+    "DOM_VK_LEFT",
+    "DOM_VK_LEFT_TAB",
+    "DOM_VK_LESS_THAN",
+    "DOM_VK_M",
+    "DOM_VK_META",
+    "DOM_VK_MODECHANGE",
+    "DOM_VK_MULTIPLY",
+    "DOM_VK_N",
+    "DOM_VK_NONCONVERT",
+    "DOM_VK_NUMPAD0",
+    "DOM_VK_NUMPAD1",
+    "DOM_VK_NUMPAD2",
+    "DOM_VK_NUMPAD3",
+    "DOM_VK_NUMPAD4",
+    "DOM_VK_NUMPAD5",
+    "DOM_VK_NUMPAD6",
+    "DOM_VK_NUMPAD7",
+    "DOM_VK_NUMPAD8",
+    "DOM_VK_NUMPAD9",
+    "DOM_VK_NUM_LOCK",
+    "DOM_VK_O",
+    "DOM_VK_OEM_1",
+    "DOM_VK_OEM_102",
+    "DOM_VK_OEM_2",
+    "DOM_VK_OEM_3",
+    "DOM_VK_OEM_4",
+    "DOM_VK_OEM_5",
+    "DOM_VK_OEM_6",
+    "DOM_VK_OEM_7",
+    "DOM_VK_OEM_8",
+    "DOM_VK_OEM_COMMA",
+    "DOM_VK_OEM_MINUS",
+    "DOM_VK_OEM_PERIOD",
+    "DOM_VK_OEM_PLUS",
+    "DOM_VK_OPEN_BRACKET",
+    "DOM_VK_OPEN_CURLY_BRACKET",
+    "DOM_VK_OPEN_PAREN",
+    "DOM_VK_P",
+    "DOM_VK_PA1",
+    "DOM_VK_PAGEDOWN",
+    "DOM_VK_PAGEUP",
+    "DOM_VK_PAGE_DOWN",
+    "DOM_VK_PAGE_UP",
+    "DOM_VK_PAUSE",
+    "DOM_VK_PERCENT",
+    "DOM_VK_PERIOD",
+    "DOM_VK_PIPE",
+    "DOM_VK_PLAY",
+    "DOM_VK_PLUS",
+    "DOM_VK_PRINT",
+    "DOM_VK_PRINTSCREEN",
+    "DOM_VK_PROCESSKEY",
+    "DOM_VK_PROPERITES",
+    "DOM_VK_Q",
+    "DOM_VK_QUESTION_MARK",
+    "DOM_VK_QUOTE",
+    "DOM_VK_R",
+    "DOM_VK_REDO",
+    "DOM_VK_RETURN",
+    "DOM_VK_RIGHT",
+    "DOM_VK_S",
+    "DOM_VK_SCROLL_LOCK",
+    "DOM_VK_SELECT",
+    "DOM_VK_SEMICOLON",
+    "DOM_VK_SEPARATOR",
+    "DOM_VK_SHIFT",
+    "DOM_VK_SLASH",
+    "DOM_VK_SLEEP",
+    "DOM_VK_SPACE",
+    "DOM_VK_SUBTRACT",
+    "DOM_VK_T",
+    "DOM_VK_TAB",
+    "DOM_VK_TILDE",
+    "DOM_VK_U",
+    "DOM_VK_UNDERSCORE",
+    "DOM_VK_UNDO",
+    "DOM_VK_UNICODE",
+    "DOM_VK_UP",
+    "DOM_VK_V",
+    "DOM_VK_VOLUME_DOWN",
+    "DOM_VK_VOLUME_MUTE",
+    "DOM_VK_VOLUME_UP",
+    "DOM_VK_W",
+    "DOM_VK_WIN",
+    "DOM_VK_WINDOW",
+    "DOM_VK_WIN_ICO_00",
+    "DOM_VK_WIN_ICO_CLEAR",
+    "DOM_VK_WIN_ICO_HELP",
+    "DOM_VK_WIN_OEM_ATTN",
+    "DOM_VK_WIN_OEM_AUTO",
+    "DOM_VK_WIN_OEM_BACKTAB",
+    "DOM_VK_WIN_OEM_CLEAR",
+    "DOM_VK_WIN_OEM_COPY",
+    "DOM_VK_WIN_OEM_CUSEL",
+    "DOM_VK_WIN_OEM_ENLW",
+    "DOM_VK_WIN_OEM_FINISH",
+    "DOM_VK_WIN_OEM_FJ_JISHO",
+    "DOM_VK_WIN_OEM_FJ_LOYA",
+    "DOM_VK_WIN_OEM_FJ_MASSHOU",
+    "DOM_VK_WIN_OEM_FJ_ROYA",
+    "DOM_VK_WIN_OEM_FJ_TOUROKU",
+    "DOM_VK_WIN_OEM_JUMP",
+    "DOM_VK_WIN_OEM_PA1",
+    "DOM_VK_WIN_OEM_PA2",
+    "DOM_VK_WIN_OEM_PA3",
+    "DOM_VK_WIN_OEM_RESET",
+    "DOM_VK_WIN_OEM_WSCTRL",
+    "DOM_VK_X",
+    "DOM_VK_XF86XK_ADD_FAVORITE",
+    "DOM_VK_XF86XK_APPLICATION_LEFT",
+    "DOM_VK_XF86XK_APPLICATION_RIGHT",
+    "DOM_VK_XF86XK_AUDIO_CYCLE_TRACK",
+    "DOM_VK_XF86XK_AUDIO_FORWARD",
+    "DOM_VK_XF86XK_AUDIO_LOWER_VOLUME",
+    "DOM_VK_XF86XK_AUDIO_MEDIA",
+    "DOM_VK_XF86XK_AUDIO_MUTE",
+    "DOM_VK_XF86XK_AUDIO_NEXT",
+    "DOM_VK_XF86XK_AUDIO_PAUSE",
+    "DOM_VK_XF86XK_AUDIO_PLAY",
+    "DOM_VK_XF86XK_AUDIO_PREV",
+    "DOM_VK_XF86XK_AUDIO_RAISE_VOLUME",
+    "DOM_VK_XF86XK_AUDIO_RANDOM_PLAY",
+    "DOM_VK_XF86XK_AUDIO_RECORD",
+    "DOM_VK_XF86XK_AUDIO_REPEAT",
+    "DOM_VK_XF86XK_AUDIO_REWIND",
+    "DOM_VK_XF86XK_AUDIO_STOP",
+    "DOM_VK_XF86XK_AWAY",
+    "DOM_VK_XF86XK_BACK",
+    "DOM_VK_XF86XK_BACK_FORWARD",
+    "DOM_VK_XF86XK_BATTERY",
+    "DOM_VK_XF86XK_BLUE",
+    "DOM_VK_XF86XK_BLUETOOTH",
+    "DOM_VK_XF86XK_BOOK",
+    "DOM_VK_XF86XK_BRIGHTNESS_ADJUST",
+    "DOM_VK_XF86XK_CALCULATOR",
+    "DOM_VK_XF86XK_CALENDAR",
+    "DOM_VK_XF86XK_CD",
+    "DOM_VK_XF86XK_CLOSE",
+    "DOM_VK_XF86XK_COMMUNITY",
+    "DOM_VK_XF86XK_CONTRAST_ADJUST",
+    "DOM_VK_XF86XK_COPY",
+    "DOM_VK_XF86XK_CUT",
+    "DOM_VK_XF86XK_CYCLE_ANGLE",
+    "DOM_VK_XF86XK_DISPLAY",
+    "DOM_VK_XF86XK_DOCUMENTS",
+    "DOM_VK_XF86XK_DOS",
+    "DOM_VK_XF86XK_EJECT",
+    "DOM_VK_XF86XK_EXCEL",
+    "DOM_VK_XF86XK_EXPLORER",
+    "DOM_VK_XF86XK_FAVORITES",
+    "DOM_VK_XF86XK_FINANCE",
+    "DOM_VK_XF86XK_FORWARD",
+    "DOM_VK_XF86XK_FRAME_BACK",
+    "DOM_VK_XF86XK_FRAME_FORWARD",
+    "DOM_VK_XF86XK_GAME",
+    "DOM_VK_XF86XK_GO",
+    "DOM_VK_XF86XK_GREEN",
+    "DOM_VK_XF86XK_HIBERNATE",
+    "DOM_VK_XF86XK_HISTORY",
+    "DOM_VK_XF86XK_HOME_PAGE",
+    "DOM_VK_XF86XK_HOT_LINKS",
+    "DOM_VK_XF86XK_I_TOUCH",
+    "DOM_VK_XF86XK_KBD_BRIGHTNESS_DOWN",
+    "DOM_VK_XF86XK_KBD_BRIGHTNESS_UP",
+    "DOM_VK_XF86XK_KBD_LIGHT_ON_OFF",
+    "DOM_VK_XF86XK_LAUNCH0",
+    "DOM_VK_XF86XK_LAUNCH1",
+    "DOM_VK_XF86XK_LAUNCH2",
+    "DOM_VK_XF86XK_LAUNCH3",
+    "DOM_VK_XF86XK_LAUNCH4",
+    "DOM_VK_XF86XK_LAUNCH5",
+    "DOM_VK_XF86XK_LAUNCH6",
+    "DOM_VK_XF86XK_LAUNCH7",
+    "DOM_VK_XF86XK_LAUNCH8",
+    "DOM_VK_XF86XK_LAUNCH9",
+    "DOM_VK_XF86XK_LAUNCH_A",
+    "DOM_VK_XF86XK_LAUNCH_B",
+    "DOM_VK_XF86XK_LAUNCH_C",
+    "DOM_VK_XF86XK_LAUNCH_D",
+    "DOM_VK_XF86XK_LAUNCH_E",
+    "DOM_VK_XF86XK_LAUNCH_F",
+    "DOM_VK_XF86XK_LIGHT_BULB",
+    "DOM_VK_XF86XK_LOG_OFF",
+    "DOM_VK_XF86XK_MAIL",
+    "DOM_VK_XF86XK_MAIL_FORWARD",
+    "DOM_VK_XF86XK_MARKET",
+    "DOM_VK_XF86XK_MEETING",
+    "DOM_VK_XF86XK_MEMO",
+    "DOM_VK_XF86XK_MENU_KB",
+    "DOM_VK_XF86XK_MENU_PB",
+    "DOM_VK_XF86XK_MESSENGER",
+    "DOM_VK_XF86XK_MON_BRIGHTNESS_DOWN",
+    "DOM_VK_XF86XK_MON_BRIGHTNESS_UP",
+    "DOM_VK_XF86XK_MUSIC",
+    "DOM_VK_XF86XK_MY_COMPUTER",
+    "DOM_VK_XF86XK_MY_SITES",
+    "DOM_VK_XF86XK_NEW",
+    "DOM_VK_XF86XK_NEWS",
+    "DOM_VK_XF86XK_OFFICE_HOME",
+    "DOM_VK_XF86XK_OPEN",
+    "DOM_VK_XF86XK_OPEN_URL",
+    "DOM_VK_XF86XK_OPTION",
+    "DOM_VK_XF86XK_PASTE",
+    "DOM_VK_XF86XK_PHONE",
+    "DOM_VK_XF86XK_PICTURES",
+    "DOM_VK_XF86XK_POWER_DOWN",
+    "DOM_VK_XF86XK_POWER_OFF",
+    "DOM_VK_XF86XK_RED",
+    "DOM_VK_XF86XK_REFRESH",
+    "DOM_VK_XF86XK_RELOAD",
+    "DOM_VK_XF86XK_REPLY",
+    "DOM_VK_XF86XK_ROCKER_DOWN",
+    "DOM_VK_XF86XK_ROCKER_ENTER",
+    "DOM_VK_XF86XK_ROCKER_UP",
+    "DOM_VK_XF86XK_ROTATE_WINDOWS",
+    "DOM_VK_XF86XK_ROTATION_KB",
+    "DOM_VK_XF86XK_ROTATION_PB",
+    "DOM_VK_XF86XK_SAVE",
+    "DOM_VK_XF86XK_SCREEN_SAVER",
+    "DOM_VK_XF86XK_SCROLL_CLICK",
+    "DOM_VK_XF86XK_SCROLL_DOWN",
+    "DOM_VK_XF86XK_SCROLL_UP",
+    "DOM_VK_XF86XK_SEARCH",
+    "DOM_VK_XF86XK_SEND",
+    "DOM_VK_XF86XK_SHOP",
+    "DOM_VK_XF86XK_SPELL",
+    "DOM_VK_XF86XK_SPLIT_SCREEN",
+    "DOM_VK_XF86XK_STANDBY",
+    "DOM_VK_XF86XK_START",
+    "DOM_VK_XF86XK_STOP",
+    "DOM_VK_XF86XK_SUBTITLE",
+    "DOM_VK_XF86XK_SUPPORT",
+    "DOM_VK_XF86XK_SUSPEND",
+    "DOM_VK_XF86XK_TASK_PANE",
+    "DOM_VK_XF86XK_TERMINAL",
+    "DOM_VK_XF86XK_TIME",
+    "DOM_VK_XF86XK_TOOLS",
+    "DOM_VK_XF86XK_TOP_MENU",
+    "DOM_VK_XF86XK_TO_DO_LIST",
+    "DOM_VK_XF86XK_TRAVEL",
+    "DOM_VK_XF86XK_USER1KB",
+    "DOM_VK_XF86XK_USER2KB",
+    "DOM_VK_XF86XK_USER_PB",
+    "DOM_VK_XF86XK_UWB",
+    "DOM_VK_XF86XK_VENDOR_HOME",
+    "DOM_VK_XF86XK_VIDEO",
+    "DOM_VK_XF86XK_VIEW",
+    "DOM_VK_XF86XK_WAKE_UP",
+    "DOM_VK_XF86XK_WEB_CAM",
+    "DOM_VK_XF86XK_WHEEL_BUTTON",
+    "DOM_VK_XF86XK_WLAN",
+    "DOM_VK_XF86XK_WORD",
+    "DOM_VK_XF86XK_WWW",
+    "DOM_VK_XF86XK_XFER",
+    "DOM_VK_XF86XK_YELLOW",
+    "DOM_VK_XF86XK_ZOOM_IN",
+    "DOM_VK_XF86XK_ZOOM_OUT",
+    "DOM_VK_Y",
+    "DOM_VK_Z",
+    "DOM_VK_ZOOM",
+    "DONE",
+    "DONT_CARE",
+    "DOWNLOADING",
+    "DRAGDROP",
+    "DRAW_BUFFER0",
+    "DRAW_BUFFER1",
+    "DRAW_BUFFER10",
+    "DRAW_BUFFER11",
+    "DRAW_BUFFER12",
+    "DRAW_BUFFER13",
+    "DRAW_BUFFER14",
+    "DRAW_BUFFER15",
+    "DRAW_BUFFER2",
+    "DRAW_BUFFER3",
+    "DRAW_BUFFER4",
+    "DRAW_BUFFER5",
+    "DRAW_BUFFER6",
+    "DRAW_BUFFER7",
+    "DRAW_BUFFER8",
+    "DRAW_BUFFER9",
+    "DRAW_FRAMEBUFFER",
+    "DRAW_FRAMEBUFFER_BINDING",
+    "DST_ALPHA",
+    "DST_COLOR",
+    "DYNAMIC_COPY",
+    "DYNAMIC_DRAW",
+    "DYNAMIC_READ",
+    "DataChannel",
+    "DataTransfer",
+    "DataTransferItem",
+    "DataTransferItemList",
+    "DataView",
+    "Date",
+    "DateTimeFormat",
+    "DecompressionStream",
+    "DelayNode",
+    "DelegatedInkTrailPresenter",
+    "DeprecationReportBody",
+    "DesktopNotification",
+    "DesktopNotificationCenter",
+    "Details",
+    "DeviceLightEvent",
+    "DeviceMotionEvent",
+    "DeviceMotionEventAcceleration",
+    "DeviceMotionEventRotationRate",
+    "DeviceOrientationEvent",
+    "DevicePosture",
+    "DeviceProximityEvent",
+    "DeviceStorage",
+    "DeviceStorageChangeEvent",
+    "DigitalCredential",
+    "Directory",
+    "DisplayNames",
+    "DisposableStack",
+    "Document",
+    "DocumentFragment",
+    "DocumentPictureInPicture",
+    "DocumentPictureInPictureEvent",
+    "DocumentTimeline",
+    "DocumentType",
+    "DragEvent",
+    "Duration",
+    "DurationFormat",
+    "DynamicsCompressorNode",
+    "E",
+    "ELEMENT_ARRAY_BUFFER",
+    "ELEMENT_ARRAY_BUFFER_BINDING",
+    "ELEMENT_NODE",
+    "EMPTY",
+    "ENCODING_ERR",
+    "ENDED",
+    "END_TO_END",
+    "END_TO_START",
+    "ENTITY_NODE",
+    "ENTITY_REFERENCE_NODE",
+    "EPSILON",
+    "EQUAL",
+    "EQUALPOWER",
+    "ERROR",
+    "EXPONENTIAL_DISTANCE",
+    "EditContext",
+    "Element",
+    "ElementInternals",
+    "ElementQuery",
+    "EncodedAudioChunk",
+    "EncodedVideoChunk",
+    "EnterPictureInPictureEvent",
+    "Entity",
+    "EntityReference",
+    "Error",
+    "ErrorEvent",
+    "EvalError",
+    "Event",
+    "EventCounts",
+    "EventException",
+    "EventSource",
+    "EventTarget",
+    "Exception",
+    "ExtensionContext",
+    "ExtensionDisabledReason",
+    "ExtensionInfo",
+    "ExtensionInstallType",
+    "ExtensionType",
+    "External",
+    "EyeDropper",
+    "FASTEST",
+    "FIDOSDK",
+    "FILTER_ACCEPT",
+    "FILTER_INTERRUPT",
+    "FILTER_REJECT",
+    "FILTER_SKIP",
+    "FINISHED_STATE",
+    "FIRST_ORDERED_NODE_TYPE",
+    "FLOAT",
+    "FLOAT_32_UNSIGNED_INT_24_8_REV",
+    "FLOAT_MAT2",
+    "FLOAT_MAT2x3",
+    "FLOAT_MAT2x4",
+    "FLOAT_MAT3",
+    "FLOAT_MAT3x2",
+    "FLOAT_MAT3x4",
+    "FLOAT_MAT4",
+    "FLOAT_MAT4x2",
+    "FLOAT_MAT4x3",
+    "FLOAT_VEC2",
+    "FLOAT_VEC3",
+    "FLOAT_VEC4",
+    "FOCUS",
+    "FONT_FACE_RULE",
+    "FONT_FEATURE_VALUES_RULE",
+    "FRAGMENT",
+    "FRAGMENT_SHADER",
+    "FRAGMENT_SHADER_DERIVATIVE_HINT",
+    "FRAGMENT_SHADER_DERIVATIVE_HINT_OES",
+    "FRAMEBUFFER",
+    "FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE",
+    "FRAMEBUFFER_ATTACHMENT_BLUE_SIZE",
+    "FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING",
+    "FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE",
+    "FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE",
+    "FRAMEBUFFER_ATTACHMENT_GREEN_SIZE",
+    "FRAMEBUFFER_ATTACHMENT_OBJECT_NAME",
+    "FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE",
+    "FRAMEBUFFER_ATTACHMENT_RED_SIZE",
+    "FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE",
+    "FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE",
+    "FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER",
+    "FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL",
+    "FRAMEBUFFER_BINDING",
+    "FRAMEBUFFER_COMPLETE",
+    "FRAMEBUFFER_DEFAULT",
+    "FRAMEBUFFER_INCOMPLETE_ATTACHMENT",
+    "FRAMEBUFFER_INCOMPLETE_DIMENSIONS",
+    "FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT",
+    "FRAMEBUFFER_INCOMPLETE_MULTISAMPLE",
+    "FRAMEBUFFER_UNSUPPORTED",
+    "FRONT",
+    "FRONT_AND_BACK",
+    "FRONT_FACE",
+    "FUNC_ADD",
+    "FUNC_REVERSE_SUBTRACT",
+    "FUNC_SUBTRACT",
+    "FeaturePolicy",
+    "FeaturePolicyViolationReportBody",
+    "FederatedCredential",
+    "Feed",
+    "FeedEntry",
+    "Fence",
+    "FencedFrameConfig",
+    "FetchLaterResult",
+    "File",
+    "FileError",
+    "FileList",
+    "FileReader",
+    "FileSystem",
+    "FileSystemDirectoryEntry",
+    "FileSystemDirectoryHandle",
+    "FileSystemDirectoryReader",
+    "FileSystemEntry",
+    "FileSystemFileEntry",
+    "FileSystemFileHandle",
+    "FileSystemHandle",
+    "FileSystemObserver",
+    "FileSystemWritableFileStream",
+    "FinalizationRegistry",
+    "FindInPage",
+    "Float16Array",
+    "Float32Array",
+    "Float64Array",
+    "FocusEvent",
+    "FontData",
+    "FontFace",
+    "FontFaceSet",
+    "FontFaceSetLoadEvent",
+    "FormData",
+    "FormDataEvent",
+    "FragmentDirective",
+    "Function",
+    "GENERATE_MIPMAP_HINT",
+    "GEQUAL",
+    "GPU",
+    "GPUAdapter",
+    "GPUAdapterInfo",
+    "GPUBindGroup",
+    "GPUBindGroupLayout",
+    "GPUBuffer",
+    "GPUBufferUsage",
+    "GPUCanvasContext",
+    "GPUColorWrite",
+    "GPUCommandBuffer",
+    "GPUCommandEncoder",
+    "GPUCompilationInfo",
+    "GPUCompilationMessage",
+    "GPUComputePassEncoder",
+    "GPUComputePipeline",
+    "GPUDevice",
+    "GPUDeviceLostInfo",
+    "GPUError",
+    "GPUExternalTexture",
+    "GPUInternalError",
+    "GPUMapMode",
+    "GPUOutOfMemoryError",
+    "GPUPipelineError",
+    "GPUPipelineLayout",
+    "GPUQuerySet",
+    "GPUQueue",
+    "GPURenderBundle",
+    "GPURenderBundleEncoder",
+    "GPURenderPassEncoder",
+    "GPURenderPipeline",
+    "GPUSampler",
+    "GPUShaderModule",
+    "GPUShaderStage",
+    "GPUSupportedFeatures",
+    "GPUSupportedLimits",
+    "GPUTexture",
+    "GPUTextureUsage",
+    "GPUTextureView",
+    "GPUUncapturedErrorEvent",
+    "GPUValidationError",
+    "GREATER",
+    "GREEN",
+    "GREEN_BITS",
+    "GainNode",
+    "Gamepad",
+    "GamepadAxisMoveEvent",
+    "GamepadButton",
+    "GamepadButtonEvent",
+    "GamepadEvent",
+    "GamepadHapticActuator",
+    "GamepadPose",
+    "Geolocation",
+    "GeolocationCoordinates",
+    "GeolocationPosition",
+    "GeolocationPositionError",
+    "GestureEvent",
+    "GetInfo",
+    "Global",
+    "GravitySensor",
+    "Gyroscope",
+    "HALF_FLOAT",
+    "HAVE_CURRENT_DATA",
+    "HAVE_ENOUGH_DATA",
+    "HAVE_FUTURE_DATA",
+    "HAVE_METADATA",
+    "HAVE_NOTHING",
+    "HEADERS_RECEIVED",
+    "HID",
+    "HIDConnectionEvent",
+    "HIDDEN",
+    "HIDDevice",
+    "HIDInputReportEvent",
+    "HIERARCHY_REQUEST_ERR",
+    "HIGHPASS",
+    "HIGHSHELF",
+    "HIGH_FLOAT",
+    "HIGH_INT",
+    "HORIZONTAL",
+    "HORIZONTAL_AXIS",
+    "HRTF",
+    "HTMLAllCollection",
+    "HTMLAnchorElement",
+    "HTMLAppletElement",
+    "HTMLAreaElement",
+    "HTMLAudioElement",
+    "HTMLBRElement",
+    "HTMLBaseElement",
+    "HTMLBaseFontElement",
+    "HTMLBlockquoteElement",
+    "HTMLBodyElement",
+    "HTMLButtonElement",
+    "HTMLCanvasElement",
+    "HTMLCollection",
+    "HTMLCommandElement",
+    "HTMLContentElement",
+    "HTMLDListElement",
+    "HTMLDataElement",
+    "HTMLDataListElement",
+    "HTMLDetailsElement",
+    "HTMLDialogElement",
+    "HTMLDirectoryElement",
+    "HTMLDivElement",
+    "HTMLDocument",
+    "HTMLElement",
+    "HTMLEmbedElement",
+    "HTMLFencedFrameElement",
+    "HTMLFieldSetElement",
+    "HTMLFontElement",
+    "HTMLFormControlsCollection",
+    "HTMLFormElement",
+    "HTMLFrameElement",
+    "HTMLFrameSetElement",
+    "HTMLHRElement",
+    "HTMLHeadElement",
+    "HTMLHeadingElement",
+    "HTMLHtmlElement",
+    "HTMLIFrameElement",
+    "HTMLImageElement",
+    "HTMLInputElement",
+    "HTMLIsIndexElement",
+    "HTMLKeygenElement",
+    "HTMLLIElement",
+    "HTMLLabelElement",
+    "HTMLLegendElement",
+    "HTMLLinkElement",
+    "HTMLMapElement",
+    "HTMLMarqueeElement",
+    "HTMLMediaElement",
+    "HTMLMenuElement",
+    "HTMLMenuItemElement",
+    "HTMLMetaElement",
+    "HTMLMeterElement",
+    "HTMLModElement",
+    "HTMLOListElement",
+    "HTMLObjectElement",
+    "HTMLOptGroupElement",
+    "HTMLOptionElement",
+    "HTMLOptionsCollection",
+    "HTMLOutputElement",
+    "HTMLParagraphElement",
+    "HTMLParamElement",
+    "HTMLPictureElement",
+    "HTMLPreElement",
+    "HTMLProgressElement",
+    "HTMLPropertiesCollection",
+    "HTMLQuoteElement",
+    "HTMLScriptElement",
+    "HTMLSelectElement",
+    "HTMLSelectedContentElement",
+    "HTMLShadowElement",
+    "HTMLSlotElement",
+    "HTMLSourceElement",
+    "HTMLSpanElement",
+    "HTMLStyleElement",
+    "HTMLTableCaptionElement",
+    "HTMLTableCellElement",
+    "HTMLTableColElement",
+    "HTMLTableElement",
+    "HTMLTableRowElement",
+    "HTMLTableSectionElement",
+    "HTMLTemplateElement",
+    "HTMLTextAreaElement",
+    "HTMLTimeElement",
+    "HTMLTitleElement",
+    "HTMLTrackElement",
+    "HTMLUListElement",
+    "HTMLUnknownElement",
+    "HTMLVideoElement",
+    "HashChangeEvent",
+    "Headers",
+    "Highlight",
+    "HighlightRegistry",
+    "History",
+    "Hz",
+    "ICE_CHECKING",
+    "ICE_CLOSED",
+    "ICE_COMPLETED",
+    "ICE_CONNECTED",
+    "ICE_FAILED",
+    "ICE_GATHERING",
+    "ICE_WAITING",
+    "IDBCursor",
+    "IDBCursorWithValue",
+    "IDBDatabase",
+    "IDBDatabaseException",
+    "IDBFactory",
+    "IDBFileHandle",
+    "IDBFileRequest",
+    "IDBIndex",
+    "IDBKeyRange",
+    "IDBMutableFile",
+    "IDBObjectStore",
+    "IDBOpenDBRequest",
+    "IDBRecord",
+    "IDBRequest",
+    "IDBTransaction",
+    "IDBVersionChangeEvent",
+    "IDLE",
+    "IIRFilterNode",
+    "IMPLEMENTATION_COLOR_READ_FORMAT",
+    "IMPLEMENTATION_COLOR_READ_TYPE",
+    "IMPORT_RULE",
+    "INCR",
+    "INCR_WRAP",
+    "INDEX",
+    "INDEX_SIZE_ERR",
+    "INDIRECT",
+    "INT",
+    "INTERLEAVED_ATTRIBS",
+    "INT_2_10_10_10_REV",
+    "INT_SAMPLER_2D",
+    "INT_SAMPLER_2D_ARRAY",
+    "INT_SAMPLER_3D",
+    "INT_SAMPLER_CUBE",
+    "INT_VEC2",
+    "INT_VEC3",
+    "INT_VEC4",
+    "INUSE_ATTRIBUTE_ERR",
+    "INVALID_ACCESS_ERR",
+    "INVALID_CHARACTER_ERR",
+    "INVALID_ENUM",
+    "INVALID_EXPRESSION_ERR",
+    "INVALID_FRAMEBUFFER_OPERATION",
+    "INVALID_INDEX",
+    "INVALID_MODIFICATION_ERR",
+    "INVALID_NODE_TYPE_ERR",
+    "INVALID_OPERATION",
+    "INVALID_STATE_ERR",
+    "INVALID_VALUE",
+    "INVERSE_DISTANCE",
+    "INVERT",
+    "IceCandidate",
+    "IconInfo",
+    "IdentityCredential",
+    "IdentityCredentialError",
+    "IdentityProvider",
+    "IdleDeadline",
+    "IdleDetector",
+    "Image",
+    "ImageBitmap",
+    "ImageBitmapRenderingContext",
+    "ImageCapture",
+    "ImageData",
+    "ImageDataType",
+    "ImageDecoder",
+    "ImageTrack",
+    "ImageTrackList",
+    "Infinity",
+    "Ink",
+    "InputDeviceCapabilities",
+    "InputDeviceInfo",
+    "InputEvent",
+    "InputMethodContext",
+    "InstallTrigger",
+    "InstallTriggerImpl",
+    "Instance",
+    "Instant",
+    "Int16Array",
+    "Int32Array",
+    "Int8Array",
+    "IntegrityViolationReportBody",
+    "Intent",
+    "InterestEvent",
+    "InternalError",
+    "IntersectionObserver",
+    "IntersectionObserverEntry",
+    "Intl",
+    "IsSearchProviderInstalled",
+    "Iterator",
+    "JSON",
+    "JSTag",
+    "KEEP",
+    "KEYDOWN",
+    "KEYFRAMES_RULE",
+    "KEYFRAME_RULE",
+    "KEYPRESS",
+    "KEYUP",
+    "KeyEvent",
+    "Keyboard",
+    "KeyboardEvent",
+    "KeyboardLayoutMap",
+    "KeyframeEffect",
+    "LENGTHADJUST_SPACING",
+    "LENGTHADJUST_SPACINGANDGLYPHS",
+    "LENGTHADJUST_UNKNOWN",
+    "LEQUAL",
+    "LESS",
+    "LINEAR",
+    "LINEAR_DISTANCE",
+    "LINEAR_MIPMAP_LINEAR",
+    "LINEAR_MIPMAP_NEAREST",
+    "LINES",
+    "LINE_LOOP",
+    "LINE_STRIP",
+    "LINE_WIDTH",
+    "LINK_STATUS",
+    "LIVE",
+    "LN10",
+    "LN2",
+    "LOADED",
+    "LOADING",
+    "LOG10E",
+    "LOG2E",
+    "LOWPASS",
+    "LOWSHELF",
+    "LOW_FLOAT",
+    "LOW_INT",
+    "LSException",
+    "LSParserFilter",
+    "LUMINANCE",
+    "LUMINANCE_ALPHA",
+    "LanguageCode",
+    "LanguageDetector",
+    "LargestContentfulPaint",
+    "LaunchParams",
+    "LaunchQueue",
+    "LaunchType",
+    "LayoutShift",
+    "LayoutShiftAttribution",
+    "LinearAccelerationSensor",
+    "LinkError",
+    "ListFormat",
+    "LocalMediaStream",
+    "Locale",
+    "Location",
+    "Lock",
+    "LockManager",
+    "MAP_READ",
+    "MAP_WRITE",
+    "MARGIN_RULE",
+    "MAX",
+    "MAX_3D_TEXTURE_SIZE",
+    "MAX_ARRAY_TEXTURE_LAYERS",
+    "MAX_CAPTURE_VISIBLE_TAB_CALLS_PER_SECOND",
+    "MAX_CLIENT_WAIT_TIMEOUT_WEBGL",
+    "MAX_COLOR_ATTACHMENTS",
+    "MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS",
+    "MAX_COMBINED_TEXTURE_IMAGE_UNITS",
+    "MAX_COMBINED_UNIFORM_BLOCKS",
+    "MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS",
+    "MAX_CUBE_MAP_TEXTURE_SIZE",
+    "MAX_DRAW_BUFFERS",
+    "MAX_ELEMENTS_INDICES",
+    "MAX_ELEMENTS_VERTICES",
+    "MAX_ELEMENT_INDEX",
+    "MAX_FRAGMENT_INPUT_COMPONENTS",
+    "MAX_FRAGMENT_UNIFORM_BLOCKS",
+    "MAX_FRAGMENT_UNIFORM_COMPONENTS",
+    "MAX_FRAGMENT_UNIFORM_VECTORS",
+    "MAX_PROGRAM_TEXEL_OFFSET",
+    "MAX_RENDERBUFFER_SIZE",
+    "MAX_SAFE_INTEGER",
+    "MAX_SAMPLES",
+    "MAX_SERVER_WAIT_TIMEOUT",
+    "MAX_TEXTURE_IMAGE_UNITS",
+    "MAX_TEXTURE_LOD_BIAS",
+    "MAX_TEXTURE_MAX_ANISOTROPY_EXT",
+    "MAX_TEXTURE_SIZE",
+    "MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS",
+    "MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS",
+    "MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS",
+    "MAX_UNIFORM_BLOCK_SIZE",
+    "MAX_UNIFORM_BUFFER_BINDINGS",
+    "MAX_VALUE",
+    "MAX_VARYING_COMPONENTS",
+    "MAX_VARYING_VECTORS",
+    "MAX_VERTEX_ATTRIBS",
+    "MAX_VERTEX_OUTPUT_COMPONENTS",
+    "MAX_VERTEX_TEXTURE_IMAGE_UNITS",
+    "MAX_VERTEX_UNIFORM_BLOCKS",
+    "MAX_VERTEX_UNIFORM_COMPONENTS",
+    "MAX_VERTEX_UNIFORM_VECTORS",
+    "MAX_VIEWPORT_DIMS",
+    "MEDIA_ERR_ABORTED",
+    "MEDIA_ERR_DECODE",
+    "MEDIA_ERR_ENCRYPTED",
+    "MEDIA_ERR_NETWORK",
+    "MEDIA_ERR_SRC_NOT_SUPPORTED",
+    "MEDIA_KEYERR_CLIENT",
+    "MEDIA_KEYERR_DOMAIN",
+    "MEDIA_KEYERR_HARDWARECHANGE",
+    "MEDIA_KEYERR_OUTPUT",
+    "MEDIA_KEYERR_SERVICE",
+    "MEDIA_KEYERR_UNKNOWN",
+    "MEDIA_RULE",
+    "MEDIUM_FLOAT",
+    "MEDIUM_INT",
+    "META_MASK",
+    "MIDIAccess",
+    "MIDIConnectionEvent",
+    "MIDIInput",
+    "MIDIInputMap",
+    "MIDIMessageEvent",
+    "MIDIOutput",
+    "MIDIOutputMap",
+    "MIDIPort",
+    "MIN",
+    "MIN_PROGRAM_TEXEL_OFFSET",
+    "MIN_SAFE_INTEGER",
+    "MIN_VALUE",
+    "MIRRORED_REPEAT",
+    "MODE_ASYNCHRONOUS",
+    "MODE_SYNCHRONOUS",
+    "MODIFICATION",
+    "MOUSEDOWN",
+    "MOUSEDRAG",
+    "MOUSEMOVE",
+    "MOUSEOUT",
+    "MOUSEOVER",
+    "MOUSEUP",
+    "MOZ_KEYFRAMES_RULE",
+    "MOZ_KEYFRAME_RULE",
+    "MOZ_SOURCE_CURSOR",
+    "MOZ_SOURCE_ERASER",
+    "MOZ_SOURCE_KEYBOARD",
+    "MOZ_SOURCE_MOUSE",
+    "MOZ_SOURCE_PEN",
+    "MOZ_SOURCE_TOUCH",
+    "MOZ_SOURCE_UNKNOWN",
+    "MSGESTURE_FLAG_BEGIN",
+    "MSGESTURE_FLAG_CANCEL",
+    "MSGESTURE_FLAG_END",
+    "MSGESTURE_FLAG_INERTIA",
+    "MSGESTURE_FLAG_NONE",
+    "MSPOINTER_TYPE_MOUSE",
+    "MSPOINTER_TYPE_PEN",
+    "MSPOINTER_TYPE_TOUCH",
+    "MS_ASYNC_CALLBACK_STATUS_ASSIGN_DELEGATE",
+    "MS_ASYNC_CALLBACK_STATUS_CANCEL",
+    "MS_ASYNC_CALLBACK_STATUS_CHOOSEANY",
+    "MS_ASYNC_CALLBACK_STATUS_ERROR",
+    "MS_ASYNC_CALLBACK_STATUS_JOIN",
+    "MS_ASYNC_OP_STATUS_CANCELED",
+    "MS_ASYNC_OP_STATUS_ERROR",
+    "MS_ASYNC_OP_STATUS_SUCCESS",
+    "MS_MANIPULATION_STATE_ACTIVE",
+    "MS_MANIPULATION_STATE_CANCELLED",
+    "MS_MANIPULATION_STATE_COMMITTED",
+    "MS_MANIPULATION_STATE_DRAGGING",
+    "MS_MANIPULATION_STATE_INERTIA",
+    "MS_MANIPULATION_STATE_PRESELECT",
+    "MS_MANIPULATION_STATE_SELECTING",
+    "MS_MANIPULATION_STATE_STOPPED",
+    "MS_MEDIA_ERR_ENCRYPTED",
+    "MS_MEDIA_KEYERR_CLIENT",
+    "MS_MEDIA_KEYERR_DOMAIN",
+    "MS_MEDIA_KEYERR_HARDWARECHANGE",
+    "MS_MEDIA_KEYERR_OUTPUT",
+    "MS_MEDIA_KEYERR_SERVICE",
+    "MS_MEDIA_KEYERR_UNKNOWN",
+    "Map",
+    "Math",
+    "MathMLElement",
+    "MediaCapabilities",
+    "MediaCapabilitiesInfo",
+    "MediaController",
+    "MediaDeviceInfo",
+    "MediaDevices",
+    "MediaElementAudioSourceNode",
+    "MediaEncryptedEvent",
+    "MediaError",
+    "MediaKeyError",
+    "MediaKeyEvent",
+    "MediaKeyMessageEvent",
+    "MediaKeyNeededEvent",
+    "MediaKeySession",
+    "MediaKeyStatusMap",
+    "MediaKeySystemAccess",
+    "MediaKeys",
+    "MediaList",
+    "MediaMetadata",
+    "MediaQueryList",
+    "MediaQueryListEvent",
+    "MediaRecorder",
+    "MediaRecorderErrorEvent",
+    "MediaSession",
+    "MediaSettingsRange",
+    "MediaSource",
+    "MediaSourceHandle",
+    "MediaStream",
+    "MediaStreamAudioDestinationNode",
+    "MediaStreamAudioSourceNode",
+    "MediaStreamEvent",
+    "MediaStreamTrack",
+    "MediaStreamTrackAudioSourceNode",
+    "MediaStreamTrackAudioStats",
+    "MediaStreamTrackEvent",
+    "MediaStreamTrackGenerator",
+    "MediaStreamTrackProcessor",
+    "MediaStreamTrackVideoStats",
+    "Memory",
+    "MessageChannel",
+    "MessageEvent",
+    "MessagePort",
+    "MessageSender",
+    "Methods",
+    "MimeType",
+    "MimeTypeArray",
+    "Module",
+    "MouseEvent",
+    "MouseScrollEvent",
+    "MozAnimation",
+    "MozAnimationDelay",
+    "MozAnimationDirection",
+    "MozAnimationDuration",
+    "MozAnimationFillMode",
+    "MozAnimationIterationCount",
+    "MozAnimationName",
+    "MozAnimationPlayState",
+    "MozAnimationTimingFunction",
+    "MozAppearance",
+    "MozBackfaceVisibility",
+    "MozBinding",
+    "MozBorderBottomColors",
+    "MozBorderEnd",
+    "MozBorderEndColor",
+    "MozBorderEndStyle",
+    "MozBorderEndWidth",
+    "MozBorderImage",
+    "MozBorderLeftColors",
+    "MozBorderRightColors",
+    "MozBorderStart",
+    "MozBorderStartColor",
+    "MozBorderStartStyle",
+    "MozBorderStartWidth",
+    "MozBorderTopColors",
+    "MozBoxAlign",
+    "MozBoxDirection",
+    "MozBoxFlex",
+    "MozBoxOrdinalGroup",
+    "MozBoxOrient",
+    "MozBoxPack",
+    "MozBoxSizing",
+    "MozCSSKeyframeRule",
+    "MozCSSKeyframesRule",
+    "MozColumnCount",
+    "MozColumnFill",
+    "MozColumnGap",
+    "MozColumnRule",
+    "MozColumnRuleColor",
+    "MozColumnRuleStyle",
+    "MozColumnRuleWidth",
+    "MozColumnWidth",
+    "MozColumns",
+    "MozContactChangeEvent",
+    "MozFloatEdge",
+    "MozFontFeatureSettings",
+    "MozFontLanguageOverride",
+    "MozForceBrokenImageIcon",
+    "MozHyphens",
+    "MozImageRegion",
+    "MozMarginEnd",
+    "MozMarginStart",
+    "MozMmsEvent",
+    "MozMmsMessage",
+    "MozMobileMessageThread",
+    "MozOSXFontSmoothing",
+    "MozOrient",
+    "MozOsxFontSmoothing",
+    "MozOutlineRadius",
+    "MozOutlineRadiusBottomleft",
+    "MozOutlineRadiusBottomright",
+    "MozOutlineRadiusTopleft",
+    "MozOutlineRadiusTopright",
+    "MozPaddingEnd",
+    "MozPaddingStart",
+    "MozPerspective",
+    "MozPerspectiveOrigin",
+    "MozPowerManager",
+    "MozSettingsEvent",
+    "MozSmsEvent",
+    "MozSmsMessage",
+    "MozStackSizing",
+    "MozTabSize",
+    "MozTextAlignLast",
+    "MozTextDecorationColor",
+    "MozTextDecorationLine",
+    "MozTextDecorationStyle",
+    "MozTextSizeAdjust",
+    "MozTransform",
+    "MozTransformOrigin",
+    "MozTransformStyle",
+    "MozTransition",
+    "MozTransitionDelay",
+    "MozTransitionDuration",
+    "MozTransitionProperty",
+    "MozTransitionTimingFunction",
+    "MozUserFocus",
+    "MozUserInput",
+    "MozUserModify",
+    "MozUserSelect",
+    "MozWindowDragging",
+    "MozWindowShadow",
+    "MutationEvent",
+    "MutationObserver",
+    "MutationRecord",
+    "MutedInfo",
+    "MutedInfoReason",
+    "NAMESPACE_ERR",
+    "NAMESPACE_RULE",
+    "NEAREST",
+    "NEAREST_MIPMAP_LINEAR",
+    "NEAREST_MIPMAP_NEAREST",
+    "NEGATIVE_INFINITY",
+    "NETWORK_EMPTY",
+    "NETWORK_ERR",
+    "NETWORK_IDLE",
+    "NETWORK_LOADED",
+    "NETWORK_LOADING",
+    "NETWORK_NO_SOURCE",
+    "NEVER",
+    "NEW",
+    "NEXT",
+    "NEXT_NO_DUPLICATE",
+    "NICEST",
+    "NODE_AFTER",
+    "NODE_BEFORE",
+    "NODE_BEFORE_AND_AFTER",
+    "NODE_INSIDE",
+    "NONE",
+    "NON_TRANSIENT_ERR",
+    "NOTATION_NODE",
+    "NOTCH",
+    "NOTEQUAL",
+    "NOT_ALLOWED_ERR",
+    "NOT_FOUND_ERR",
+    "NOT_READABLE_ERR",
+    "NOT_SUPPORTED_ERR",
+    "NO_DATA_ALLOWED_ERR",
+    "NO_ERR",
+    "NO_ERROR",
+    "NO_MODIFICATION_ALLOWED_ERR",
+    "NUMBER_TYPE",
+    "NUM_COMPRESSED_TEXTURE_FORMATS",
+    "NaN",
+    "NamedNodeMap",
+    "NavigateEvent",
+    "Navigation",
+    "NavigationActivation",
+    "NavigationCurrentEntryChangeEvent",
+    "NavigationDestination",
+    "NavigationHistoryEntry",
+    "NavigationPrecommitController",
+    "NavigationPreloadManager",
+    "NavigationTransition",
+    "Navigator",
+    "NavigatorLogin",
+    "NavigatorManagedData",
+    "NavigatorUAData",
+    "NearbyLinks",
+    "NetworkInformation",
+    "Node",
+    "NodeFilter",
+    "NodeIterator",
+    "NodeList",
+    "NotRestoredReasonDetails",
+    "NotRestoredReasons",
+    "Notation",
+    "Notification",
+    "NotifyPaintEvent",
+    "Now",
+    "Number",
+    "NumberFormat",
+    "OBJECT_TYPE",
+    "OBSOLETE",
+    "OK",
+    "ONE",
+    "ONE_MINUS_CONSTANT_ALPHA",
+    "ONE_MINUS_CONSTANT_COLOR",
+    "ONE_MINUS_DST_ALPHA",
+    "ONE_MINUS_DST_COLOR",
+    "ONE_MINUS_SRC_ALPHA",
+    "ONE_MINUS_SRC_COLOR",
+    "OPEN",
+    "OPENED",
+    "OPENING",
+    "ORDERED_NODE_ITERATOR_TYPE",
+    "ORDERED_NODE_SNAPSHOT_TYPE",
+    "OTHER_ERROR",
+    "OTPCredential",
+    "OUT_OF_MEMORY",
+    "Object",
+    "Observable",
+    "OfflineAudioCompletionEvent",
+    "OfflineAudioContext",
+    "OfflineResourceList",
+    "OffscreenCanvas",
+    "OffscreenCanvasRenderingContext2D",
+    "OnClickData",
+    "OnInstalledReason",
+    "OnPerformanceWarningCategory",
+    "OnPerformanceWarningSeverity",
+    "OnRestartRequiredReason",
+    "Option",
+    "OrientationSensor",
+    "OscillatorNode",
+    "OverconstrainedError",
+    "OverflowEvent",
+    "PACK_ALIGNMENT",
+    "PACK_ROW_LENGTH",
+    "PACK_SKIP_PIXELS",
+    "PACK_SKIP_ROWS",
+    "PAGE_RULE",
+    "PARSE_ERR",
+    "PATHSEG_ARC_ABS",
+    "PATHSEG_ARC_REL",
+    "PATHSEG_CLOSEPATH",
+    "PATHSEG_CURVETO_CUBIC_ABS",
+    "PATHSEG_CURVETO_CUBIC_REL",
+    "PATHSEG_CURVETO_CUBIC_SMOOTH_ABS",
+    "PATHSEG_CURVETO_CUBIC_SMOOTH_REL",
+    "PATHSEG_CURVETO_QUADRATIC_ABS",
+    "PATHSEG_CURVETO_QUADRATIC_REL",
+    "PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS",
+    "PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL",
+    "PATHSEG_LINETO_ABS",
+    "PATHSEG_LINETO_HORIZONTAL_ABS",
+    "PATHSEG_LINETO_HORIZONTAL_REL",
+    "PATHSEG_LINETO_REL",
+    "PATHSEG_LINETO_VERTICAL_ABS",
+    "PATHSEG_LINETO_VERTICAL_REL",
+    "PATHSEG_MOVETO_ABS",
+    "PATHSEG_MOVETO_REL",
+    "PATHSEG_UNKNOWN",
+    "PATH_EXISTS_ERR",
+    "PEAKING",
+    "PERMISSION_DENIED",
+    "PERSISTENT",
+    "PI",
+    "PIXEL_PACK_BUFFER",
+    "PIXEL_PACK_BUFFER_BINDING",
+    "PIXEL_UNPACK_BUFFER",
+    "PIXEL_UNPACK_BUFFER_BINDING",
+    "PLAYING_STATE",
+    "POINTS",
+    "POLYGON_OFFSET_FACTOR",
+    "POLYGON_OFFSET_FILL",
+    "POLYGON_OFFSET_UNITS",
+    "POSITION_UNAVAILABLE",
+    "POSITIVE_INFINITY",
+    "PREV",
+    "PREV_NO_DUPLICATE",
+    "PROCESSING_INSTRUCTION_NODE",
+    "PageChangeEvent",
+    "PageRevealEvent",
+    "PageSettings",
+    "PageSwapEvent",
+    "PageTransitionEvent",
+    "PaintRequest",
+    "PaintRequestList",
+    "PannerNode",
+    "PasswordCredential",
+    "Path2D",
+    "PaymentAddress",
+    "PaymentInstruments",
+    "PaymentManager",
+    "PaymentMethodChangeEvent",
+    "PaymentRequest",
+    "PaymentRequestUpdateEvent",
+    "PaymentResponse",
+    "Performance",
+    "PerformanceElementTiming",
+    "PerformanceEntry",
+    "PerformanceEventTiming",
+    "PerformanceLongAnimationFrameTiming",
+    "PerformanceLongTaskTiming",
+    "PerformanceMark",
+    "PerformanceMeasure",
+    "PerformanceNavigation",
+    "PerformanceNavigationTiming",
+    "PerformanceObserver",
+    "PerformanceObserverEntryList",
+    "PerformancePaintTiming",
+    "PerformanceResourceTiming",
+    "PerformanceScriptTiming",
+    "PerformanceServerTiming",
+    "PerformanceTiming",
+    "PeriodicSyncManager",
+    "PeriodicWave",
+    "PermissionStatus",
+    "Permissions",
+    "PhotoCapabilities",
+    "PictureInPictureEvent",
+    "PictureInPictureWindow",
+    "PlainDate",
+    "PlainDateTime",
+    "PlainMonthDay",
+    "PlainTime",
+    "PlainYearMonth",
+    "PlatformArch",
+    "PlatformInfo",
+    "PlatformNaclArch",
+    "PlatformOs",
+    "Plugin",
+    "PluginArray",
+    "PluralRules",
+    "PointerEvent",
+    "PopStateEvent",
+    "PopupBlockedEvent",
+    "Port",
+    "Presentation",
+    "PresentationAvailability",
+    "PresentationConnection",
+    "PresentationConnectionAvailableEvent",
+    "PresentationConnectionCloseEvent",
+    "PresentationConnectionList",
+    "PresentationReceiver",
+    "PresentationRequest",
+    "PressureObserver",
+    "PressureRecord",
+    "ProcessingInstruction",
+    "Profiler",
+    "ProgressEvent",
+    "Promise",
+    "PromiseRejectionEvent",
+    "PropertyNodeList",
+    "ProtectedAudience",
+    "Proxy",
+    "PublicKeyCredential",
+    "PushManager",
+    "PushSubscription",
+    "PushSubscriptionOptions",
+    "Q",
+    "QUERY_RESOLVE",
+    "QUERY_RESULT",
+    "QUERY_RESULT_AVAILABLE",
+    "QUOTA_ERR",
+    "QUOTA_EXCEEDED_ERR",
+    "QueryInterface",
+    "QuotaExceededError",
+    "R11F_G11F_B10F",
+    "R16F",
+    "R16I",
+    "R16UI",
+    "R32F",
+    "R32I",
+    "R32UI",
+    "R8",
+    "R8I",
+    "R8UI",
+    "R8_SNORM",
+    "RASTERIZER_DISCARD",
+    "READ",
+    "READ_BUFFER",
+    "READ_FRAMEBUFFER",
+    "READ_FRAMEBUFFER_BINDING",
+    "READ_ONLY",
+    "READ_ONLY_ERR",
+    "READ_WRITE",
+    "RED",
+    "RED_BITS",
+    "RED_INTEGER",
+    "REMOVAL",
+    "RENDERBUFFER",
+    "RENDERBUFFER_ALPHA_SIZE",
+    "RENDERBUFFER_BINDING",
+    "RENDERBUFFER_BLUE_SIZE",
+    "RENDERBUFFER_DEPTH_SIZE",
+    "RENDERBUFFER_GREEN_SIZE",
+    "RENDERBUFFER_HEIGHT",
+    "RENDERBUFFER_INTERNAL_FORMAT",
+    "RENDERBUFFER_RED_SIZE",
+    "RENDERBUFFER_SAMPLES",
+    "RENDERBUFFER_STENCIL_SIZE",
+    "RENDERBUFFER_WIDTH",
+    "RENDERER",
+    "RENDERING_INTENT_ABSOLUTE_COLORIMETRIC",
+    "RENDERING_INTENT_AUTO",
+    "RENDERING_INTENT_PERCEPTUAL",
+    "RENDERING_INTENT_RELATIVE_COLORIMETRIC",
+    "RENDERING_INTENT_SATURATION",
+    "RENDERING_INTENT_UNKNOWN",
+    "RENDER_ATTACHMENT",
+    "REPEAT",
+    "REPLACE",
+    "RG",
+    "RG16F",
+    "RG16I",
+    "RG16UI",
+    "RG32F",
+    "RG32I",
+    "RG32UI",
+    "RG8",
+    "RG8I",
+    "RG8UI",
+    "RG8_SNORM",
+    "RGB",
+    "RGB10_A2",
+    "RGB10_A2UI",
+    "RGB16F",
+    "RGB16I",
+    "RGB16UI",
+    "RGB32F",
+    "RGB32I",
+    "RGB32UI",
+    "RGB565",
+    "RGB5_A1",
+    "RGB8",
+    "RGB8I",
+    "RGB8UI",
+    "RGB8_SNORM",
+    "RGB9_E5",
+    "RGBA",
+    "RGBA16F",
+    "RGBA16I",
+    "RGBA16UI",
+    "RGBA32F",
+    "RGBA32I",
+    "RGBA32UI",
+    "RGBA4",
+    "RGBA8",
+    "RGBA8I",
+    "RGBA8UI",
+    "RGBA8_SNORM",
+    "RGBA_INTEGER",
+    "RGBColor",
+    "RGB_INTEGER",
+    "RG_INTEGER",
+    "ROTATION_CLOCKWISE",
+    "ROTATION_COUNTERCLOCKWISE",
+    "RTCCertificate",
+    "RTCDTMFSender",
+    "RTCDTMFToneChangeEvent",
+    "RTCDataChannel",
+    "RTCDataChannelEvent",
+    "RTCDtlsTransport",
+    "RTCEncodedAudioFrame",
+    "RTCEncodedVideoFrame",
+    "RTCError",
+    "RTCErrorEvent",
+    "RTCIceCandidate",
+    "RTCIceTransport",
+    "RTCPeerConnection",
+    "RTCPeerConnectionIceErrorEvent",
+    "RTCPeerConnectionIceEvent",
+    "RTCRtpReceiver",
+    "RTCRtpScriptTransform",
+    "RTCRtpSender",
+    "RTCRtpTransceiver",
+    "RTCSctpTransport",
+    "RTCSessionDescription",
+    "RTCStatsReport",
+    "RTCTrackEvent",
+    "RadioNodeList",
+    "Range",
+    "RangeError",
+    "RangeException",
+    "ReadableByteStreamController",
+    "ReadableStream",
+    "ReadableStreamBYOBReader",
+    "ReadableStreamBYOBRequest",
+    "ReadableStreamDefaultController",
+    "ReadableStreamDefaultReader",
+    "RecordErrorEvent",
+    "Rect",
+    "ReferenceError",
+    "Reflect",
+    "RegExp",
+    "RelativeOrientationSensor",
+    "RelativeTimeFormat",
+    "RemotePlayback",
+    "Report",
+    "ReportBody",
+    "ReportingObserver",
+    "Request",
+    "RequestUpdateCheckStatus",
+    "ResizeObserver",
+    "ResizeObserverEntry",
+    "ResizeObserverSize",
+    "Response",
+    "RestrictionTarget",
+    "RuntimeError",
+    "SAMPLER_2D",
+    "SAMPLER_2D_ARRAY",
+    "SAMPLER_2D_ARRAY_SHADOW",
+    "SAMPLER_2D_SHADOW",
+    "SAMPLER_3D",
+    "SAMPLER_BINDING",
+    "SAMPLER_CUBE",
+    "SAMPLER_CUBE_SHADOW",
+    "SAMPLES",
+    "SAMPLE_ALPHA_TO_COVERAGE",
+    "SAMPLE_BUFFERS",
+    "SAMPLE_COVERAGE",
+    "SAMPLE_COVERAGE_INVERT",
+    "SAMPLE_COVERAGE_VALUE",
+    "SAWTOOTH",
+    "SCHEDULED_STATE",
+    "SCISSOR_BOX",
+    "SCISSOR_TEST",
+    "SCROLL_PAGE_DOWN",
+    "SCROLL_PAGE_UP",
+    "SDP_ANSWER",
+    "SDP_OFFER",
+    "SDP_PRANSWER",
+    "SECURITY_ERR",
+    "SELECT",
+    "SEPARATE_ATTRIBS",
+    "SERIALIZE_ERR",
+    "SEVERITY_ERROR",
+    "SEVERITY_FATAL_ERROR",
+    "SEVERITY_WARNING",
+    "SHADER_COMPILER",
+    "SHADER_TYPE",
+    "SHADING_LANGUAGE_VERSION",
+    "SHIFT_MASK",
+    "SHORT",
+    "SHOWING",
+    "SHOW_ALL",
+    "SHOW_ATTRIBUTE",
+    "SHOW_CDATA_SECTION",
+    "SHOW_COMMENT",
+    "SHOW_DOCUMENT",
+    "SHOW_DOCUMENT_FRAGMENT",
+    "SHOW_DOCUMENT_TYPE",
+    "SHOW_ELEMENT",
+    "SHOW_ENTITY",
+    "SHOW_ENTITY_REFERENCE",
+    "SHOW_NOTATION",
+    "SHOW_PROCESSING_INSTRUCTION",
+    "SHOW_TEXT",
+    "SIGNALED",
+    "SIGNED_NORMALIZED",
+    "SINE",
+    "SOUNDFIELD",
+    "SQLException",
+    "SQRT1_2",
+    "SQRT2",
+    "SQUARE",
+    "SRC_ALPHA",
+    "SRC_ALPHA_SATURATE",
+    "SRC_COLOR",
+    "SRGB",
+    "SRGB8",
+    "SRGB8_ALPHA8",
+    "START_TO_END",
+    "START_TO_START",
+    "STATIC_COPY",
+    "STATIC_DRAW",
+    "STATIC_READ",
+    "STENCIL",
+    "STENCIL_ATTACHMENT",
+    "STENCIL_BACK_FAIL",
+    "STENCIL_BACK_FUNC",
+    "STENCIL_BACK_PASS_DEPTH_FAIL",
+    "STENCIL_BACK_PASS_DEPTH_PASS",
+    "STENCIL_BACK_REF",
+    "STENCIL_BACK_VALUE_MASK",
+    "STENCIL_BACK_WRITEMASK",
+    "STENCIL_BITS",
+    "STENCIL_BUFFER_BIT",
+    "STENCIL_CLEAR_VALUE",
+    "STENCIL_FAIL",
+    "STENCIL_FUNC",
+    "STENCIL_INDEX",
+    "STENCIL_INDEX8",
+    "STENCIL_PASS_DEPTH_FAIL",
+    "STENCIL_PASS_DEPTH_PASS",
+    "STENCIL_REF",
+    "STENCIL_TEST",
+    "STENCIL_VALUE_MASK",
+    "STENCIL_WRITEMASK",
+    "STORAGE",
+    "STORAGE_BINDING",
+    "STREAM_COPY",
+    "STREAM_DRAW",
+    "STREAM_READ",
+    "STRING_TYPE",
+    "STYLE_RULE",
+    "SUBPIXEL_BITS",
+    "SUPPORTS_RULE",
+    "SVGAElement",
+    "SVGAltGlyphDefElement",
+    "SVGAltGlyphElement",
+    "SVGAltGlyphItemElement",
+    "SVGAngle",
+    "SVGAnimateColorElement",
+    "SVGAnimateElement",
+    "SVGAnimateMotionElement",
+    "SVGAnimateTransformElement",
+    "SVGAnimatedAngle",
+    "SVGAnimatedBoolean",
+    "SVGAnimatedEnumeration",
+    "SVGAnimatedInteger",
+    "SVGAnimatedLength",
+    "SVGAnimatedLengthList",
+    "SVGAnimatedNumber",
+    "SVGAnimatedNumberList",
+    "SVGAnimatedPreserveAspectRatio",
+    "SVGAnimatedRect",
+    "SVGAnimatedString",
+    "SVGAnimatedTransformList",
+    "SVGAnimationElement",
+    "SVGCircleElement",
+    "SVGClipPathElement",
+    "SVGColor",
+    "SVGComponentTransferFunctionElement",
+    "SVGCursorElement",
+    "SVGDefsElement",
+    "SVGDescElement",
+    "SVGDiscardElement",
+    "SVGDocument",
+    "SVGElement",
+    "SVGElementInstance",
+    "SVGElementInstanceList",
+    "SVGEllipseElement",
+    "SVGException",
+    "SVGFEBlendElement",
+    "SVGFEColorMatrixElement",
+    "SVGFEComponentTransferElement",
+    "SVGFECompositeElement",
+    "SVGFEConvolveMatrixElement",
+    "SVGFEDiffuseLightingElement",
+    "SVGFEDisplacementMapElement",
+    "SVGFEDistantLightElement",
+    "SVGFEDropShadowElement",
+    "SVGFEFloodElement",
+    "SVGFEFuncAElement",
+    "SVGFEFuncBElement",
+    "SVGFEFuncGElement",
+    "SVGFEFuncRElement",
+    "SVGFEGaussianBlurElement",
+    "SVGFEImageElement",
+    "SVGFEMergeElement",
+    "SVGFEMergeNodeElement",
+    "SVGFEMorphologyElement",
+    "SVGFEOffsetElement",
+    "SVGFEPointLightElement",
+    "SVGFESpecularLightingElement",
+    "SVGFESpotLightElement",
+    "SVGFETileElement",
+    "SVGFETurbulenceElement",
+    "SVGFilterElement",
+    "SVGFontElement",
+    "SVGFontFaceElement",
+    "SVGFontFaceFormatElement",
+    "SVGFontFaceNameElement",
+    "SVGFontFaceSrcElement",
+    "SVGFontFaceUriElement",
+    "SVGForeignObjectElement",
+    "SVGGElement",
+    "SVGGeometryElement",
+    "SVGGlyphElement",
+    "SVGGlyphRefElement",
+    "SVGGradientElement",
+    "SVGGraphicsElement",
+    "SVGHKernElement",
+    "SVGImageElement",
+    "SVGLength",
+    "SVGLengthList",
+    "SVGLineElement",
+    "SVGLinearGradientElement",
+    "SVGMPathElement",
+    "SVGMarkerElement",
+    "SVGMaskElement",
+    "SVGMatrix",
+    "SVGMetadataElement",
+    "SVGMissingGlyphElement",
+    "SVGNumber",
+    "SVGNumberList",
+    "SVGPaint",
+    "SVGPathElement",
+    "SVGPathSeg",
+    "SVGPathSegArcAbs",
+    "SVGPathSegArcRel",
+    "SVGPathSegClosePath",
+    "SVGPathSegCurvetoCubicAbs",
+    "SVGPathSegCurvetoCubicRel",
+    "SVGPathSegCurvetoCubicSmoothAbs",
+    "SVGPathSegCurvetoCubicSmoothRel",
+    "SVGPathSegCurvetoQuadraticAbs",
+    "SVGPathSegCurvetoQuadraticRel",
+    "SVGPathSegCurvetoQuadraticSmoothAbs",
+    "SVGPathSegCurvetoQuadraticSmoothRel",
+    "SVGPathSegLinetoAbs",
+    "SVGPathSegLinetoHorizontalAbs",
+    "SVGPathSegLinetoHorizontalRel",
+    "SVGPathSegLinetoRel",
+    "SVGPathSegLinetoVerticalAbs",
+    "SVGPathSegLinetoVerticalRel",
+    "SVGPathSegList",
+    "SVGPathSegMovetoAbs",
+    "SVGPathSegMovetoRel",
+    "SVGPatternElement",
+    "SVGPoint",
+    "SVGPointList",
+    "SVGPolygonElement",
+    "SVGPolylineElement",
+    "SVGPreserveAspectRatio",
+    "SVGRadialGradientElement",
+    "SVGRect",
+    "SVGRectElement",
+    "SVGRenderingIntent",
+    "SVGSVGElement",
+    "SVGScriptElement",
+    "SVGSetElement",
+    "SVGStopElement",
+    "SVGStringList",
+    "SVGStyleElement",
+    "SVGSwitchElement",
+    "SVGSymbolElement",
+    "SVGTRefElement",
+    "SVGTSpanElement",
+    "SVGTextContentElement",
+    "SVGTextElement",
+    "SVGTextPathElement",
+    "SVGTextPositioningElement",
+    "SVGTitleElement",
+    "SVGTransform",
+    "SVGTransformList",
+    "SVGUnitTypes",
+    "SVGUseElement",
+    "SVGVKernElement",
+    "SVGViewElement",
+    "SVGViewSpec",
+    "SVGZoomAndPan",
+    "SVGZoomEvent",
+    "SVG_ANGLETYPE_DEG",
+    "SVG_ANGLETYPE_GRAD",
+    "SVG_ANGLETYPE_RAD",
+    "SVG_ANGLETYPE_UNKNOWN",
+    "SVG_ANGLETYPE_UNSPECIFIED",
+    "SVG_CHANNEL_A",
+    "SVG_CHANNEL_B",
+    "SVG_CHANNEL_G",
+    "SVG_CHANNEL_R",
+    "SVG_CHANNEL_UNKNOWN",
+    "SVG_COLORTYPE_CURRENTCOLOR",
+    "SVG_COLORTYPE_RGBCOLOR",
+    "SVG_COLORTYPE_RGBCOLOR_ICCCOLOR",
+    "SVG_COLORTYPE_UNKNOWN",
+    "SVG_EDGEMODE_DUPLICATE",
+    "SVG_EDGEMODE_NONE",
+    "SVG_EDGEMODE_UNKNOWN",
+    "SVG_EDGEMODE_WRAP",
+    "SVG_FEBLEND_MODE_COLOR",
+    "SVG_FEBLEND_MODE_COLOR_BURN",
+    "SVG_FEBLEND_MODE_COLOR_DODGE",
+    "SVG_FEBLEND_MODE_DARKEN",
+    "SVG_FEBLEND_MODE_DIFFERENCE",
+    "SVG_FEBLEND_MODE_EXCLUSION",
+    "SVG_FEBLEND_MODE_HARD_LIGHT",
+    "SVG_FEBLEND_MODE_HUE",
+    "SVG_FEBLEND_MODE_LIGHTEN",
+    "SVG_FEBLEND_MODE_LUMINOSITY",
+    "SVG_FEBLEND_MODE_MULTIPLY",
+    "SVG_FEBLEND_MODE_NORMAL",
+    "SVG_FEBLEND_MODE_OVERLAY",
+    "SVG_FEBLEND_MODE_SATURATION",
+    "SVG_FEBLEND_MODE_SCREEN",
+    "SVG_FEBLEND_MODE_SOFT_LIGHT",
+    "SVG_FEBLEND_MODE_UNKNOWN",
+    "SVG_FECOLORMATRIX_TYPE_HUEROTATE",
+    "SVG_FECOLORMATRIX_TYPE_LUMINANCETOALPHA",
+    "SVG_FECOLORMATRIX_TYPE_MATRIX",
+    "SVG_FECOLORMATRIX_TYPE_SATURATE",
+    "SVG_FECOLORMATRIX_TYPE_UNKNOWN",
+    "SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE",
+    "SVG_FECOMPONENTTRANSFER_TYPE_GAMMA",
+    "SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY",
+    "SVG_FECOMPONENTTRANSFER_TYPE_LINEAR",
+    "SVG_FECOMPONENTTRANSFER_TYPE_TABLE",
+    "SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN",
+    "SVG_FECOMPOSITE_OPERATOR_ARITHMETIC",
+    "SVG_FECOMPOSITE_OPERATOR_ATOP",
+    "SVG_FECOMPOSITE_OPERATOR_IN",
+    "SVG_FECOMPOSITE_OPERATOR_LIGHTER",
+    "SVG_FECOMPOSITE_OPERATOR_OUT",
+    "SVG_FECOMPOSITE_OPERATOR_OVER",
+    "SVG_FECOMPOSITE_OPERATOR_UNKNOWN",
+    "SVG_FECOMPOSITE_OPERATOR_XOR",
+    "SVG_INVALID_VALUE_ERR",
+    "SVG_LENGTHTYPE_CM",
+    "SVG_LENGTHTYPE_EMS",
+    "SVG_LENGTHTYPE_EXS",
+    "SVG_LENGTHTYPE_IN",
+    "SVG_LENGTHTYPE_MM",
+    "SVG_LENGTHTYPE_NUMBER",
+    "SVG_LENGTHTYPE_PC",
+    "SVG_LENGTHTYPE_PERCENTAGE",
+    "SVG_LENGTHTYPE_PT",
+    "SVG_LENGTHTYPE_PX",
+    "SVG_LENGTHTYPE_UNKNOWN",
+    "SVG_MARKERUNITS_STROKEWIDTH",
+    "SVG_MARKERUNITS_UNKNOWN",
+    "SVG_MARKERUNITS_USERSPACEONUSE",
+    "SVG_MARKER_ORIENT_ANGLE",
+    "SVG_MARKER_ORIENT_AUTO",
+    "SVG_MARKER_ORIENT_AUTO_START_REVERSE",
+    "SVG_MARKER_ORIENT_UNKNOWN",
+    "SVG_MASKTYPE_ALPHA",
+    "SVG_MASKTYPE_LUMINANCE",
+    "SVG_MATRIX_NOT_INVERTABLE",
+    "SVG_MEETORSLICE_MEET",
+    "SVG_MEETORSLICE_SLICE",
+    "SVG_MEETORSLICE_UNKNOWN",
+    "SVG_MORPHOLOGY_OPERATOR_DILATE",
+    "SVG_MORPHOLOGY_OPERATOR_ERODE",
+    "SVG_MORPHOLOGY_OPERATOR_UNKNOWN",
+    "SVG_PAINTTYPE_CURRENTCOLOR",
+    "SVG_PAINTTYPE_NONE",
+    "SVG_PAINTTYPE_RGBCOLOR",
+    "SVG_PAINTTYPE_RGBCOLOR_ICCCOLOR",
+    "SVG_PAINTTYPE_UNKNOWN",
+    "SVG_PAINTTYPE_URI",
+    "SVG_PAINTTYPE_URI_CURRENTCOLOR",
+    "SVG_PAINTTYPE_URI_NONE",
+    "SVG_PAINTTYPE_URI_RGBCOLOR",
+    "SVG_PAINTTYPE_URI_RGBCOLOR_ICCCOLOR",
+    "SVG_PRESERVEASPECTRATIO_NONE",
+    "SVG_PRESERVEASPECTRATIO_UNKNOWN",
+    "SVG_PRESERVEASPECTRATIO_XMAXYMAX",
+    "SVG_PRESERVEASPECTRATIO_XMAXYMID",
+    "SVG_PRESERVEASPECTRATIO_XMAXYMIN",
+    "SVG_PRESERVEASPECTRATIO_XMIDYMAX",
+    "SVG_PRESERVEASPECTRATIO_XMIDYMID",
+    "SVG_PRESERVEASPECTRATIO_XMIDYMIN",
+    "SVG_PRESERVEASPECTRATIO_XMINYMAX",
+    "SVG_PRESERVEASPECTRATIO_XMINYMID",
+    "SVG_PRESERVEASPECTRATIO_XMINYMIN",
+    "SVG_SPREADMETHOD_PAD",
+    "SVG_SPREADMETHOD_REFLECT",
+    "SVG_SPREADMETHOD_REPEAT",
+    "SVG_SPREADMETHOD_UNKNOWN",
+    "SVG_STITCHTYPE_NOSTITCH",
+    "SVG_STITCHTYPE_STITCH",
+    "SVG_STITCHTYPE_UNKNOWN",
+    "SVG_TRANSFORM_MATRIX",
+    "SVG_TRANSFORM_ROTATE",
+    "SVG_TRANSFORM_SCALE",
+    "SVG_TRANSFORM_SKEWX",
+    "SVG_TRANSFORM_SKEWY",
+    "SVG_TRANSFORM_TRANSLATE",
+    "SVG_TRANSFORM_UNKNOWN",
+    "SVG_TURBULENCE_TYPE_FRACTALNOISE",
+    "SVG_TURBULENCE_TYPE_TURBULENCE",
+    "SVG_TURBULENCE_TYPE_UNKNOWN",
+    "SVG_UNIT_TYPE_OBJECTBOUNDINGBOX",
+    "SVG_UNIT_TYPE_UNKNOWN",
+    "SVG_UNIT_TYPE_USERSPACEONUSE",
+    "SVG_WRONG_TYPE_ERR",
+    "SVG_ZOOMANDPAN_DISABLE",
+    "SVG_ZOOMANDPAN_MAGNIFY",
+    "SVG_ZOOMANDPAN_UNKNOWN",
+    "SYNC_CONDITION",
+    "SYNC_FENCE",
+    "SYNC_FLAGS",
+    "SYNC_FLUSH_COMMANDS_BIT",
+    "SYNC_GPU_COMMANDS_COMPLETE",
+    "SYNC_STATUS",
+    "SYNTAX_ERR",
+    "SavedPages",
+    "Scheduler",
+    "Scheduling",
+    "Screen",
+    "ScreenDetailed",
+    "ScreenDetails",
+    "ScreenOrientation",
+    "Script",
+    "ScriptProcessorNode",
+    "ScrollAreaEvent",
+    "ScrollTimeline",
+    "SecurityPolicyViolationEvent",
+    "Segmenter",
+    "Selection",
+    "Sensor",
+    "SensorErrorEvent",
+    "Serial",
+    "SerialPort",
+    "ServiceWorker",
+    "ServiceWorkerContainer",
+    "ServiceWorkerRegistration",
+    "SessionDescription",
+    "Set",
+    "ShadowRoot",
+    "SharedArrayBuffer",
+    "SharedStorage",
+    "SharedStorageAppendMethod",
+    "SharedStorageClearMethod",
+    "SharedStorageDeleteMethod",
+    "SharedStorageModifierMethod",
+    "SharedStorageSetMethod",
+    "SharedStorageWorklet",
+    "SharedWorker",
+    "SharingState",
+    "SimpleGestureEvent",
+    "SnapEvent",
+    "SourceBuffer",
+    "SourceBufferList",
+    "SpeechGrammar",
+    "SpeechGrammarList",
+    "SpeechRecognition",
+    "SpeechRecognitionErrorEvent",
+    "SpeechRecognitionEvent",
+    "SpeechRecognitionPhrase",
+    "SpeechSynthesis",
+    "SpeechSynthesisErrorEvent",
+    "SpeechSynthesisEvent",
+    "SpeechSynthesisUtterance",
+    "SpeechSynthesisVoice",
+    "StaticRange",
+    "StereoPannerNode",
+    "StopIteration",
+    "Storage",
+    "StorageBucket",
+    "StorageBucketManager",
+    "StorageEvent",
+    "StorageManager",
+    "String",
+    "StructType",
+    "StylePropertyMap",
+    "StylePropertyMapReadOnly",
+    "StyleSheet",
+    "StyleSheetList",
+    "SubmitEvent",
+    "Subscriber",
+    "SubtleCrypto",
+    "Summarizer",
+    "SuppressedError",
+    "SuspendError",
+    "Suspending",
+    "Symbol",
+    "SyncManager",
+    "SyntaxError",
+    "TAB_ID_NONE",
+    "TAB_INDEX_NONE",
+    "TEMPORARY",
+    "TEXTPATH_METHODTYPE_ALIGN",
+    "TEXTPATH_METHODTYPE_STRETCH",
+    "TEXTPATH_METHODTYPE_UNKNOWN",
+    "TEXTPATH_SPACINGTYPE_AUTO",
+    "TEXTPATH_SPACINGTYPE_EXACT",
+    "TEXTPATH_SPACINGTYPE_UNKNOWN",
+    "TEXTURE",
+    "TEXTURE0",
+    "TEXTURE1",
+    "TEXTURE10",
+    "TEXTURE11",
+    "TEXTURE12",
+    "TEXTURE13",
+    "TEXTURE14",
+    "TEXTURE15",
+    "TEXTURE16",
+    "TEXTURE17",
+    "TEXTURE18",
+    "TEXTURE19",
+    "TEXTURE2",
+    "TEXTURE20",
+    "TEXTURE21",
+    "TEXTURE22",
+    "TEXTURE23",
+    "TEXTURE24",
+    "TEXTURE25",
+    "TEXTURE26",
+    "TEXTURE27",
+    "TEXTURE28",
+    "TEXTURE29",
+    "TEXTURE3",
+    "TEXTURE30",
+    "TEXTURE31",
+    "TEXTURE4",
+    "TEXTURE5",
+    "TEXTURE6",
+    "TEXTURE7",
+    "TEXTURE8",
+    "TEXTURE9",
+    "TEXTURE_2D",
+    "TEXTURE_2D_ARRAY",
+    "TEXTURE_3D",
+    "TEXTURE_BASE_LEVEL",
+    "TEXTURE_BINDING",
+    "TEXTURE_BINDING_2D",
+    "TEXTURE_BINDING_2D_ARRAY",
+    "TEXTURE_BINDING_3D",
+    "TEXTURE_BINDING_CUBE_MAP",
+    "TEXTURE_COMPARE_FUNC",
+    "TEXTURE_COMPARE_MODE",
+    "TEXTURE_CUBE_MAP",
+    "TEXTURE_CUBE_MAP_NEGATIVE_X",
+    "TEXTURE_CUBE_MAP_NEGATIVE_Y",
+    "TEXTURE_CUBE_MAP_NEGATIVE_Z",
+    "TEXTURE_CUBE_MAP_POSITIVE_X",
+    "TEXTURE_CUBE_MAP_POSITIVE_Y",
+    "TEXTURE_CUBE_MAP_POSITIVE_Z",
+    "TEXTURE_IMMUTABLE_FORMAT",
+    "TEXTURE_IMMUTABLE_LEVELS",
+    "TEXTURE_MAG_FILTER",
+    "TEXTURE_MAX_ANISOTROPY_EXT",
+    "TEXTURE_MAX_LEVEL",
+    "TEXTURE_MAX_LOD",
+    "TEXTURE_MIN_FILTER",
+    "TEXTURE_MIN_LOD",
+    "TEXTURE_WRAP_R",
+    "TEXTURE_WRAP_S",
+    "TEXTURE_WRAP_T",
+    "TEXT_NODE",
+    "TIMEOUT",
+    "TIMEOUT_ERR",
+    "TIMEOUT_EXPIRED",
+    "TIMEOUT_IGNORED",
+    "TOO_LARGE_ERR",
+    "TRANSACTION_INACTIVE_ERR",
+    "TRANSFORM_FEEDBACK",
+    "TRANSFORM_FEEDBACK_ACTIVE",
+    "TRANSFORM_FEEDBACK_BINDING",
+    "TRANSFORM_FEEDBACK_BUFFER",
+    "TRANSFORM_FEEDBACK_BUFFER_BINDING",
+    "TRANSFORM_FEEDBACK_BUFFER_MODE",
+    "TRANSFORM_FEEDBACK_BUFFER_SIZE",
+    "TRANSFORM_FEEDBACK_BUFFER_START",
+    "TRANSFORM_FEEDBACK_PAUSED",
+    "TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN",
+    "TRANSFORM_FEEDBACK_VARYINGS",
+    "TRIANGLE",
+    "TRIANGLES",
+    "TRIANGLE_FAN",
+    "TRIANGLE_STRIP",
+    "TYPE_BACK_FORWARD",
+    "TYPE_ERR",
+    "TYPE_MISMATCH_ERR",
+    "TYPE_NAVIGATE",
+    "TYPE_RELOAD",
+    "TYPE_RESERVED",
+    "Tab",
+    "TabStatus",
+    "Table",
+    "Tag",
+    "TaskAttributionTiming",
+    "TaskController",
+    "TaskPriorityChangeEvent",
+    "TaskSignal",
+    "Temporal",
+    "Text",
+    "TextDecoder",
+    "TextDecoderStream",
+    "TextEncoder",
+    "TextEncoderStream",
+    "TextEvent",
+    "TextFormat",
+    "TextFormatUpdateEvent",
+    "TextMetrics",
+    "TextTrack",
+    "TextTrackCue",
+    "TextTrackCueList",
+    "TextTrackList",
+    "TextUpdateEvent",
+    "TimeEvent",
+    "TimeRanges",
+    "ToggleEvent",
+    "Touch",
+    "TouchEvent",
+    "TouchList",
+    "TrackEvent",
+    "TransformStream",
+    "TransformStreamDefaultController",
+    "TransitionEvent",
+    "Translator",
+    "TreeWalker",
+    "TrustedHTML",
+    "TrustedScript",
+    "TrustedScriptURL",
+    "TrustedTypePolicy",
+    "TrustedTypePolicyFactory",
+    "TypeError",
+    "TypedObject",
+    "U2F",
+    "UIEvent",
+    "UNCACHED",
+    "UNIFORM",
+    "UNIFORM_ARRAY_STRIDE",
+    "UNIFORM_BLOCK_ACTIVE_UNIFORMS",
+    "UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES",
+    "UNIFORM_BLOCK_BINDING",
+    "UNIFORM_BLOCK_DATA_SIZE",
+    "UNIFORM_BLOCK_INDEX",
+    "UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER",
+    "UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER",
+    "UNIFORM_BUFFER",
+    "UNIFORM_BUFFER_BINDING",
+    "UNIFORM_BUFFER_OFFSET_ALIGNMENT",
+    "UNIFORM_BUFFER_SIZE",
+    "UNIFORM_BUFFER_START",
+    "UNIFORM_IS_ROW_MAJOR",
+    "UNIFORM_MATRIX_STRIDE",
+    "UNIFORM_OFFSET",
+    "UNIFORM_SIZE",
+    "UNIFORM_TYPE",
+    "UNKNOWN_ERR",
+    "UNKNOWN_RULE",
+    "UNMASKED_RENDERER_WEBGL",
+    "UNMASKED_VENDOR_WEBGL",
+    "UNORDERED_NODE_ITERATOR_TYPE",
+    "UNORDERED_NODE_SNAPSHOT_TYPE",
+    "UNPACK_ALIGNMENT",
+    "UNPACK_COLORSPACE_CONVERSION_WEBGL",
+    "UNPACK_FLIP_Y_WEBGL",
+    "UNPACK_IMAGE_HEIGHT",
+    "UNPACK_PREMULTIPLY_ALPHA_WEBGL",
+    "UNPACK_ROW_LENGTH",
+    "UNPACK_SKIP_IMAGES",
+    "UNPACK_SKIP_PIXELS",
+    "UNPACK_SKIP_ROWS",
+    "UNSCHEDULED_STATE",
+    "UNSENT",
+    "UNSIGNALED",
+    "UNSIGNED_BYTE",
+    "UNSIGNED_INT",
+    "UNSIGNED_INT_10F_11F_11F_REV",
+    "UNSIGNED_INT_24_8",
+    "UNSIGNED_INT_2_10_10_10_REV",
+    "UNSIGNED_INT_5_9_9_9_REV",
+    "UNSIGNED_INT_SAMPLER_2D",
+    "UNSIGNED_INT_SAMPLER_2D_ARRAY",
+    "UNSIGNED_INT_SAMPLER_3D",
+    "UNSIGNED_INT_SAMPLER_CUBE",
+    "UNSIGNED_INT_VEC2",
+    "UNSIGNED_INT_VEC3",
+    "UNSIGNED_INT_VEC4",
+    "UNSIGNED_NORMALIZED",
+    "UNSIGNED_SHORT",
+    "UNSIGNED_SHORT_4_4_4_4",
+    "UNSIGNED_SHORT_5_5_5_1",
+    "UNSIGNED_SHORT_5_6_5",
+    "UNSPECIFIED_EVENT_TYPE_ERR",
+    "UPDATEREADY",
+    "URIError",
+    "URL",
+    "URLPattern",
+    "URLSearchParams",
+    "URLUnencoded",
+    "URL_MISMATCH_ERR",
+    "USB",
+    "USBAlternateInterface",
+    "USBConfiguration",
+    "USBConnectionEvent",
+    "USBDevice",
+    "USBEndpoint",
+    "USBInTransferResult",
+    "USBInterface",
+    "USBIsochronousInTransferPacket",
+    "USBIsochronousInTransferResult",
+    "USBIsochronousOutTransferPacket",
+    "USBIsochronousOutTransferResult",
+    "USBOutTransferResult",
+    "UTC",
+    "Uint16Array",
+    "Uint32Array",
+    "Uint8Array",
+    "Uint8ClampedArray",
+    "UpdateFilter",
+    "UpdatePropertyName",
+    "UserActivation",
+    "UserMessageHandler",
+    "UserMessageHandlersNamespace",
+    "UserProximityEvent",
+    "VALIDATE_STATUS",
+    "VALIDATION_ERR",
+    "VARIABLES_RULE",
+    "VENDOR",
+    "VERSION",
+    "VERSION_CHANGE",
+    "VERSION_ERR",
+    "VERTEX",
+    "VERTEX_ARRAY_BINDING",
+    "VERTEX_ATTRIB_ARRAY_BUFFER_BINDING",
+    "VERTEX_ATTRIB_ARRAY_DIVISOR",
+    "VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE",
+    "VERTEX_ATTRIB_ARRAY_ENABLED",
+    "VERTEX_ATTRIB_ARRAY_INTEGER",
+    "VERTEX_ATTRIB_ARRAY_NORMALIZED",
+    "VERTEX_ATTRIB_ARRAY_POINTER",
+    "VERTEX_ATTRIB_ARRAY_SIZE",
+    "VERTEX_ATTRIB_ARRAY_STRIDE",
+    "VERTEX_ATTRIB_ARRAY_TYPE",
+    "VERTEX_SHADER",
+    "VERTICAL",
+    "VERTICAL_AXIS",
+    "VER_ERR",
+    "VIEWPORT",
+    "VIEWPORT_RULE",
+    "VRDisplay",
+    "VRDisplayCapabilities",
+    "VRDisplayEvent",
+    "VREyeParameters",
+    "VRFieldOfView",
+    "VRFrameData",
+    "VRPose",
+    "VRStageParameters",
+    "VTTCue",
+    "VTTRegion",
+    "ValidityState",
+    "VideoColorSpace",
+    "VideoDecoder",
+    "VideoEncoder",
+    "VideoFrame",
+    "VideoPlaybackQuality",
+    "VideoStreamTrack",
+    "ViewTimeline",
+    "ViewTransition",
+    "ViewTransitionTypeSet",
+    "ViewType",
+    "Viewport",
+    "VirtualKeyboard",
+    "VirtualKeyboardGeometryChangeEvent",
+    "VisibilityStateEntry",
+    "VisualViewport",
+    "WAIT_FAILED",
+    "WEBKIT_FILTER_RULE",
+    "WEBKIT_KEYFRAMES_RULE",
+    "WEBKIT_KEYFRAME_RULE",
+    "WEBKIT_REGION_RULE",
+    "WGSLLanguageFeatures",
+    "WINDOW_ID_CURRENT",
+    "WINDOW_ID_NONE",
+    "WRITE",
+    "WRONG_DOCUMENT_ERR",
+    "WakeLock",
+    "WakeLockSentinel",
+    "WasmAnyRef",
+    "WaveShaperNode",
+    "WeakMap",
+    "WeakRef",
+    "WeakSet",
+    "WebAssembly",
+    "WebGL2RenderingContext",
+    "WebGLActiveInfo",
+    "WebGLBuffer",
+    "WebGLContextEvent",
+    "WebGLFramebuffer",
+    "WebGLObject",
+    "WebGLProgram",
+    "WebGLQuery",
+    "WebGLRenderbuffer",
+    "WebGLRenderingContext",
+    "WebGLSampler",
+    "WebGLShader",
+    "WebGLShaderPrecisionFormat",
+    "WebGLSync",
+    "WebGLTexture",
+    "WebGLTransformFeedback",
+    "WebGLUniformLocation",
+    "WebGLVertexArray",
+    "WebGLVertexArrayObject",
+    "WebKitAnimationEvent",
+    "WebKitBlobBuilder",
+    "WebKitCSSFilterRule",
+    "WebKitCSSFilterValue",
+    "WebKitCSSKeyframeRule",
+    "WebKitCSSKeyframesRule",
+    "WebKitCSSMatrix",
+    "WebKitCSSRegionRule",
+    "WebKitCSSTransformValue",
+    "WebKitDataCue",
+    "WebKitGamepad",
+    "WebKitMediaKeyError",
+    "WebKitMediaKeyMessageEvent",
+    "WebKitMediaKeySession",
+    "WebKitMediaKeys",
+    "WebKitMediaSource",
+    "WebKitMutationObserver",
+    "WebKitNamespace",
+    "WebKitPlaybackTargetAvailabilityEvent",
+    "WebKitPoint",
+    "WebKitShadowRoot",
+    "WebKitSourceBuffer",
+    "WebKitSourceBufferList",
+    "WebKitTransitionEvent",
+    "WebSocket",
+    "WebSocketError",
+    "WebSocketStream",
+    "WebTransport",
+    "WebTransportBidirectionalStream",
+    "WebTransportDatagramDuplexStream",
+    "WebTransportError",
+    "WebTransportReceiveStream",
+    "WebTransportSendStream",
+    "WebkitAlignContent",
+    "WebkitAlignItems",
+    "WebkitAlignSelf",
+    "WebkitAnimation",
+    "WebkitAnimationDelay",
+    "WebkitAnimationDirection",
+    "WebkitAnimationDuration",
+    "WebkitAnimationFillMode",
+    "WebkitAnimationIterationCount",
+    "WebkitAnimationName",
+    "WebkitAnimationPlayState",
+    "WebkitAnimationTimingFunction",
+    "WebkitAppearance",
+    "WebkitBackfaceVisibility",
+    "WebkitBackgroundClip",
+    "WebkitBackgroundOrigin",
+    "WebkitBackgroundSize",
+    "WebkitBorderBottomLeftRadius",
+    "WebkitBorderBottomRightRadius",
+    "WebkitBorderImage",
+    "WebkitBorderRadius",
+    "WebkitBorderTopLeftRadius",
+    "WebkitBorderTopRightRadius",
+    "WebkitBoxAlign",
+    "WebkitBoxDirection",
+    "WebkitBoxFlex",
+    "WebkitBoxOrdinalGroup",
+    "WebkitBoxOrient",
+    "WebkitBoxPack",
+    "WebkitBoxShadow",
+    "WebkitBoxSizing",
+    "WebkitClipPath",
+    "WebkitFilter",
+    "WebkitFlex",
+    "WebkitFlexBasis",
+    "WebkitFlexDirection",
+    "WebkitFlexFlow",
+    "WebkitFlexGrow",
+    "WebkitFlexShrink",
+    "WebkitFlexWrap",
+    "WebkitFontFeatureSettings",
+    "WebkitJustifyContent",
+    "WebkitLineClamp",
+    "WebkitMask",
+    "WebkitMaskClip",
+    "WebkitMaskComposite",
+    "WebkitMaskImage",
+    "WebkitMaskOrigin",
+    "WebkitMaskPosition",
+    "WebkitMaskPositionX",
+    "WebkitMaskPositionY",
+    "WebkitMaskRepeat",
+    "WebkitMaskSize",
+    "WebkitOrder",
+    "WebkitPerspective",
+    "WebkitPerspectiveOrigin",
+    "WebkitTextFillColor",
+    "WebkitTextSecurity",
+    "WebkitTextSizeAdjust",
+    "WebkitTextStroke",
+    "WebkitTextStrokeColor",
+    "WebkitTextStrokeWidth",
+    "WebkitTransform",
+    "WebkitTransformOrigin",
+    "WebkitTransformStyle",
+    "WebkitTransition",
+    "WebkitTransitionDelay",
+    "WebkitTransitionDuration",
+    "WebkitTransitionProperty",
+    "WebkitTransitionTimingFunction",
+    "WebkitUserSelect",
+    "WheelEvent",
+    "Window",
+    "WindowControlsOverlay",
+    "WindowControlsOverlayGeometryChangeEvent",
+    "WindowState",
+    "WindowType",
+    "Worker",
+    "Worklet",
+    "WritableStream",
+    "WritableStreamDefaultController",
+    "WritableStreamDefaultWriter",
+    "XMLDocument",
+    "XMLHttpRequest",
+    "XMLHttpRequestEventTarget",
+    "XMLHttpRequestException",
+    "XMLHttpRequestProgressEvent",
+    "XMLHttpRequestUpload",
+    "XMLSerializer",
+    "XMLStylesheetProcessingInstruction",
+    "XPathEvaluator",
+    "XPathException",
+    "XPathExpression",
+    "XPathNSResolver",
+    "XPathResult",
+    "XRAnchor",
+    "XRAnchorSet",
+    "XRBoundedReferenceSpace",
+    "XRCPUDepthInformation",
+    "XRCamera",
+    "XRDOMOverlayState",
+    "XRDepthInformation",
+    "XRFrame",
+    "XRHand",
+    "XRHitTestResult",
+    "XRHitTestSource",
+    "XRInputSource",
+    "XRInputSourceArray",
+    "XRInputSourceEvent",
+    "XRInputSourcesChangeEvent",
+    "XRJointPose",
+    "XRJointSpace",
+    "XRLayer",
+    "XRLightEstimate",
+    "XRLightProbe",
+    "XRPose",
+    "XRRay",
+    "XRReferenceSpace",
+    "XRReferenceSpaceEvent",
+    "XRRenderState",
+    "XRRigidTransform",
+    "XRSession",
+    "XRSessionEvent",
+    "XRSpace",
+    "XRSystem",
+    "XRTransientInputHitTestResult",
+    "XRTransientInputHitTestSource",
+    "XRView",
+    "XRViewerPose",
+    "XRViewport",
+    "XRWebGLBinding",
+    "XRWebGLDepthInformation",
+    "XRWebGLLayer",
+    "XSLTProcessor",
+    "ZERO",
+    "ZonedDateTime",
+    "ZoomSettings",
+    "ZoomSettingsMode",
+    "ZoomSettingsScope",
+    "_XD0M_",
+    "_YD0M_",
+    "__REACT_DEVTOOLS_GLOBAL_HOOK__",
+    "__brand",
+    "__defineGetter__",
+    "__defineSetter__",
+    "__lookupGetter__",
+    "__lookupSetter__",
+    "__opera",
+    "__proto__",
+    "_browserjsran",
+    "a",
+    "aLink",
+    "abbr",
+    "abort",
+    "aborted",
+    "aboutConfigPrefs",
+    "abs",
+    "absolute",
+    "acceleration",
+    "accelerationIncludingGravity",
+    "accelerator",
+    "accent-color",
+    "accentColor",
+    "accept",
+    "acceptCharset",
+    "acceptNode",
+    "access",
+    "accessKey",
+    "accessKeyLabel",
+    "accuracy",
+    "acos",
+    "acosh",
+    "action",
+    "actionURL",
+    "actions",
+    "activated",
+    "activation",
+    "activationStart",
+    "active",
+    "activeCues",
+    "activeElement",
+    "activeSourceBuffers",
+    "activeSourceCount",
+    "activeTexture",
+    "activeVRDisplays",
+    "activeViewTransition",
+    "activityLog",
+    "actualBoundingBoxAscent",
+    "actualBoundingBoxDescent",
+    "actualBoundingBoxLeft",
+    "actualBoundingBoxRight",
+    "adAuctionComponents",
+    "adAuctionHeaders",
+    "adapterInfo",
+    "add",
+    "addAll",
+    "addBehavior",
+    "addCandidate",
+    "addColorStop",
+    "addCue",
+    "addElement",
+    "addEventListener",
+    "addFilter",
+    "addFromString",
+    "addFromUri",
+    "addIceCandidate",
+    "addImport",
+    "addListener",
+    "addModule",
+    "addNamed",
+    "addPageRule",
+    "addPath",
+    "addPointer",
+    "addRange",
+    "addRegion",
+    "addRule",
+    "addSearchEngine",
+    "addSourceBuffer",
+    "addStream",
+    "addTeardown",
+    "addTextTrack",
+    "addTrack",
+    "addTransceiver",
+    "addWakeLockListener",
+    "added",
+    "addedNodes",
+    "additionalName",
+    "additiveSymbols",
+    "addons",
+    "address",
+    "addressLine",
+    "addressModeU",
+    "addressModeV",
+    "addressModeW",
+    "adopt",
+    "adoptNode",
+    "adoptedCallback",
+    "adoptedStyleSheets",
+    "adr",
+    "advance",
+    "after",
+    "alarms",
+    "album",
+    "alert",
+    "algorithm",
+    "align",
+    "align-content",
+    "align-items",
+    "align-self",
+    "alignContent",
+    "alignItems",
+    "alignSelf",
+    "alignmentBaseline",
+    "alinkColor",
+    "all",
+    "allSettled",
+    "allocationSize",
+    "allow",
+    "allowFullscreen",
+    "allowPaymentRequest",
+    "allowedDirections",
+    "allowedFeatures",
+    "allowedToPlay",
+    "allowsFeature",
+    "alpha",
+    "alphaMode",
+    "alphaToCoverageEnabled",
+    "alphabeticBaseline",
+    "alt",
+    "altGraphKey",
+    "altHtml",
+    "altKey",
+    "altLeft",
+    "alternate",
+    "alternateSetting",
+    "alternates",
+    "altitude",
+    "altitudeAccuracy",
+    "altitudeAngle",
+    "amplitude",
+    "ancestorOrigins",
+    "anchor",
+    "anchorName",
+    "anchorNode",
+    "anchorOffset",
+    "anchorScope",
+    "anchorSpace",
+    "anchors",
+    "and",
+    "angle",
+    "angularAcceleration",
+    "angularVelocity",
+    "animVal",
+    "animate",
+    "animated",
+    "animatedInstanceRoot",
+    "animatedNormalizedPathSegList",
+    "animatedPathSegList",
+    "animatedPoints",
+    "animation",
+    "animation-composition",
+    "animation-delay",
+    "animation-direction",
+    "animation-duration",
+    "animation-fill-mode",
+    "animation-iteration-count",
+    "animation-name",
+    "animation-play-state",
+    "animation-timing-function",
+    "animationComposition",
+    "animationDelay",
+    "animationDirection",
+    "animationDuration",
+    "animationFillMode",
+    "animationIterationCount",
+    "animationName",
+    "animationPlayState",
+    "animationStartTime",
+    "animationTimingFunction",
+    "animationsPaused",
+    "anniversary",
+    "annotation",
+    "antialias",
+    "anticipatedRemoval",
+    "any",
+    "app",
+    "appCodeName",
+    "appMinorVersion",
+    "appName",
+    "appNotifications",
+    "appVersion",
+    "appearance",
+    "append",
+    "appendBuffer",
+    "appendChild",
+    "appendData",
+    "appendItem",
+    "appendMedium",
+    "appendNamed",
+    "appendRule",
+    "appendStream",
+    "appendWindowEnd",
+    "appendWindowStart",
+    "applets",
+    "applicationCache",
+    "applicationServerKey",
+    "apply",
+    "applyConstraints",
+    "applyElement",
+    "arc",
+    "arcTo",
+    "arch",
+    "architecture",
+    "archive",
+    "areas",
+    "arguments",
+    "ariaActiveDescendantElement",
+    "ariaAtomic",
+    "ariaAutoComplete",
+    "ariaBrailleLabel",
+    "ariaBrailleRoleDescription",
+    "ariaBusy",
+    "ariaChecked",
+    "ariaColCount",
+    "ariaColIndex",
+    "ariaColIndexText",
+    "ariaColSpan",
+    "ariaControlsElements",
+    "ariaCurrent",
+    "ariaDescribedByElements",
+    "ariaDescription",
+    "ariaDetailsElements",
+    "ariaDisabled",
+    "ariaErrorMessageElements",
+    "ariaExpanded",
+    "ariaFlowToElements",
+    "ariaHasPopup",
+    "ariaHidden",
+    "ariaInvalid",
+    "ariaKeyShortcuts",
+    "ariaLabel",
+    "ariaLabelledByElements",
+    "ariaLevel",
+    "ariaLive",
+    "ariaModal",
+    "ariaMultiLine",
+    "ariaMultiSelectable",
+    "ariaNotify",
+    "ariaOrientation",
+    "ariaOwnsElements",
+    "ariaPlaceholder",
+    "ariaPosInSet",
+    "ariaPressed",
+    "ariaReadOnly",
+    "ariaRelevant",
+    "ariaRequired",
+    "ariaRoleDescription",
+    "ariaRowCount",
+    "ariaRowIndex",
+    "ariaRowIndexText",
+    "ariaRowSpan",
+    "ariaSelected",
+    "ariaSetSize",
+    "ariaSort",
+    "ariaValueMax",
+    "ariaValueMin",
+    "ariaValueNow",
+    "ariaValueText",
+    "arrayBuffer",
+    "arrayLayerCount",
+    "arrayStride",
+    "artist",
+    "artwork",
+    "as",
+    "asIntN",
+    "asUintN",
+    "ascentOverride",
+    "asin",
+    "asinh",
+    "aspect",
+    "aspect-ratio",
+    "aspectRatio",
+    "assert",
+    "assign",
+    "assignedElements",
+    "assignedNodes",
+    "assignedSlot",
+    "async",
+    "asyncDispose",
+    "asyncIterator",
+    "at",
+    "atEnd",
+    "atan",
+    "atan2",
+    "atanh",
+    "atob",
+    "attachEvent",
+    "attachInternals",
+    "attachShader",
+    "attachShadow",
+    "attachedElements",
+    "attachments",
+    "attack",
+    "attestationObject",
+    "attrChange",
+    "attrName",
+    "attributeChangedCallback",
+    "attributeFilter",
+    "attributeName",
+    "attributeNamespace",
+    "attributeOldValue",
+    "attributeStyleMap",
+    "attributes",
+    "attribution",
+    "attributionSrc",
+    "audioBitrateMode",
+    "audioBitsPerSecond",
+    "audioTracks",
+    "audioWorklet",
+    "authenticatedSignedWrites",
+    "authenticatorAttachment",
+    "authenticatorData",
+    "autoIncrement",
+    "autobuffer",
+    "autocapitalize",
+    "autocomplete",
+    "autocorrect",
+    "autofocus",
+    "automationRate",
+    "autoplay",
+    "availHeight",
+    "availLeft",
+    "availTop",
+    "availWidth",
+    "availability",
+    "available",
+    "averageLatency",
+    "aversion",
+    "ax",
+    "axes",
+    "axis",
+    "ay",
+    "azimuth",
+    "azimuthAngle",
+    "b",
+    "back",
+    "backdrop-filter",
+    "backdropFilter",
+    "backends",
+    "backface-visibility",
+    "backfaceVisibility",
+    "background",
+    "background-attachment",
+    "background-blend-mode",
+    "background-clip",
+    "background-color",
+    "background-image",
+    "background-origin",
+    "background-position",
+    "background-position-x",
+    "background-position-y",
+    "background-repeat",
+    "background-size",
+    "backgroundAttachment",
+    "backgroundBlendMode",
+    "backgroundClip",
+    "backgroundColor",
+    "backgroundFetch",
+    "backgroundImage",
+    "backgroundOrigin",
+    "backgroundPosition",
+    "backgroundPositionX",
+    "backgroundPositionY",
+    "backgroundRepeat",
+    "backgroundSize",
+    "badInput",
+    "badge",
+    "balance",
+    "baseArrayLayer",
+    "baseFrequencyX",
+    "baseFrequencyY",
+    "baseLatency",
+    "baseLayer",
+    "baseMipLevel",
+    "baseNode",
+    "baseOffset",
+    "basePalette",
+    "baseURI",
+    "baseVal",
+    "baseline-source",
+    "baselineShift",
+    "baselineSource",
+    "batchUpdate",
+    "battery",
+    "bday",
+    "before",
+    "beginComputePass",
+    "beginElement",
+    "beginElementAt",
+    "beginOcclusionQuery",
+    "beginPath",
+    "beginQuery",
+    "beginRenderPass",
+    "beginTransformFeedback",
+    "beginningOfPassWriteIndex",
+    "behavior",
+    "behaviorCookie",
+    "behaviorPart",
+    "behaviorUrns",
+    "beta",
+    "bezierCurveTo",
+    "bgColor",
+    "bgProperties",
+    "bias",
+    "big",
+    "bigint64",
+    "biguint64",
+    "binaryType",
+    "bind",
+    "bindAttribLocation",
+    "bindBuffer",
+    "bindBufferBase",
+    "bindBufferRange",
+    "bindFramebuffer",
+    "bindGroupLayouts",
+    "bindRenderbuffer",
+    "bindSampler",
+    "bindTexture",
+    "bindTransformFeedback",
+    "bindVertexArray",
+    "binding",
+    "bitness",
+    "blend",
+    "blendColor",
+    "blendEquation",
+    "blendEquationSeparate",
+    "blendFunc",
+    "blendFuncSeparate",
+    "blink",
+    "blitFramebuffer",
+    "blob",
+    "block-size",
+    "blockDirection",
+    "blockSize",
+    "blockedURI",
+    "blockedURL",
+    "blocking",
+    "blockingDuration",
+    "blue",
+    "bluetooth",
+    "blur",
+    "body",
+    "bodyUsed",
+    "bold",
+    "bookmarks",
+    "booleanValue",
+    "boost",
+    "border",
+    "border-block",
+    "border-block-color",
+    "border-block-end",
+    "border-block-end-color",
+    "border-block-end-style",
+    "border-block-end-width",
+    "border-block-start",
+    "border-block-start-color",
+    "border-block-start-style",
+    "border-block-start-width",
+    "border-block-style",
+    "border-block-width",
+    "border-bottom",
+    "border-bottom-color",
+    "border-bottom-left-radius",
+    "border-bottom-right-radius",
+    "border-bottom-style",
+    "border-bottom-width",
+    "border-collapse",
+    "border-color",
+    "border-end-end-radius",
+    "border-end-start-radius",
+    "border-image",
+    "border-image-outset",
+    "border-image-repeat",
+    "border-image-slice",
+    "border-image-source",
+    "border-image-width",
+    "border-inline",
+    "border-inline-color",
+    "border-inline-end",
+    "border-inline-end-color",
+    "border-inline-end-style",
+    "border-inline-end-width",
+    "border-inline-start",
+    "border-inline-start-color",
+    "border-inline-start-style",
+    "border-inline-start-width",
+    "border-inline-style",
+    "border-inline-width",
+    "border-left",
+    "border-left-color",
+    "border-left-style",
+    "border-left-width",
+    "border-radius",
+    "border-right",
+    "border-right-color",
+    "border-right-style",
+    "border-right-width",
+    "border-spacing",
+    "border-start-end-radius",
+    "border-start-start-radius",
+    "border-style",
+    "border-top",
+    "border-top-color",
+    "border-top-left-radius",
+    "border-top-right-radius",
+    "border-top-style",
+    "border-top-width",
+    "border-width",
+    "borderBlock",
+    "borderBlockColor",
+    "borderBlockEnd",
+    "borderBlockEndColor",
+    "borderBlockEndStyle",
+    "borderBlockEndWidth",
+    "borderBlockStart",
+    "borderBlockStartColor",
+    "borderBlockStartStyle",
+    "borderBlockStartWidth",
+    "borderBlockStyle",
+    "borderBlockWidth",
+    "borderBottom",
+    "borderBottomColor",
+    "borderBottomLeftRadius",
+    "borderBottomRightRadius",
+    "borderBottomStyle",
+    "borderBottomWidth",
+    "borderBoxSize",
+    "borderCollapse",
+    "borderColor",
+    "borderColorDark",
+    "borderColorLight",
+    "borderEndEndRadius",
+    "borderEndStartRadius",
+    "borderImage",
+    "borderImageOutset",
+    "borderImageRepeat",
+    "borderImageSlice",
+    "borderImageSource",
+    "borderImageWidth",
+    "borderInline",
+    "borderInlineColor",
+    "borderInlineEnd",
+    "borderInlineEndColor",
+    "borderInlineEndStyle",
+    "borderInlineEndWidth",
+    "borderInlineStart",
+    "borderInlineStartColor",
+    "borderInlineStartStyle",
+    "borderInlineStartWidth",
+    "borderInlineStyle",
+    "borderInlineWidth",
+    "borderLeft",
+    "borderLeftColor",
+    "borderLeftStyle",
+    "borderLeftWidth",
+    "borderRadius",
+    "borderRight",
+    "borderRightColor",
+    "borderRightStyle",
+    "borderRightWidth",
+    "borderSpacing",
+    "borderStartEndRadius",
+    "borderStartStartRadius",
+    "borderStyle",
+    "borderTop",
+    "borderTopColor",
+    "borderTopLeftRadius",
+    "borderTopRightRadius",
+    "borderTopStyle",
+    "borderTopWidth",
+    "borderWidth",
+    "bottom",
+    "bottomMargin",
+    "bound",
+    "boundElements",
+    "boundingClientRect",
+    "boundingHeight",
+    "boundingLeft",
+    "boundingRect",
+    "boundingTop",
+    "boundingWidth",
+    "bounds",
+    "boundsGeometry",
+    "box-decoration-break",
+    "box-shadow",
+    "box-sizing",
+    "boxDecorationBreak",
+    "boxShadow",
+    "boxSizing",
+    "brand",
+    "brands",
+    "break-after",
+    "break-before",
+    "break-inside",
+    "breakAfter",
+    "breakBefore",
+    "breakInside",
+    "broadcast",
+    "browser",
+    "browserLanguage",
+    "browserSettings",
+    "browsingData",
+    "browsingTopics",
+    "btoa",
+    "bubbles",
+    "buffer",
+    "bufferData",
+    "bufferDepth",
+    "bufferSize",
+    "bufferSubData",
+    "buffered",
+    "bufferedAmount",
+    "bufferedAmountLowThreshold",
+    "buffers",
+    "buildID",
+    "buildNumber",
+    "button",
+    "buttonID",
+    "buttons",
+    "byobRequest",
+    "byteLength",
+    "byteOffset",
+    "bytes",
+    "bytesPerRow",
+    "bytesWritten",
+    "c",
+    "cache",
+    "caches",
+    "calendar",
+    "call",
+    "caller",
+    "camera",
+    "canBeFormatted",
+    "canBeMounted",
+    "canBeShared",
+    "canConstructInDedicatedWorker",
+    "canGoBack",
+    "canGoForward",
+    "canHaveChildren",
+    "canHaveHTML",
+    "canInsertDTMF",
+    "canIntercept",
+    "canLoadAdAuctionFencedFrame",
+    "canLoadOpaqueURL",
+    "canMakePayment",
+    "canParse",
+    "canPlayType",
+    "canPresent",
+    "canShare",
+    "canTransition",
+    "canTrickleIceCandidates",
+    "cancel",
+    "cancelAndHoldAtTime",
+    "cancelAnimationFrame",
+    "cancelBubble",
+    "cancelIdleCallback",
+    "cancelScheduledValues",
+    "cancelVideoFrameCallback",
+    "cancelWatchAvailability",
+    "cancelable",
+    "candidate",
+    "canonicalUUID",
+    "canvas",
+    "cap",
+    "capabilities",
+    "caption",
+    "caption-side",
+    "captionSide",
+    "captivePortal",
+    "capture",
+    "captureEvents",
+    "captureStackTrace",
+    "captureStream",
+    "captureTab",
+    "captureVisibleTab",
+    "caret-color",
+    "caretBidiLevel",
+    "caretColor",
+    "caretPositionFromPoint",
+    "caretRangeFromPoint",
+    "cast",
+    "catch",
+    "category",
+    "cause",
+    "cbrt",
+    "cd",
+    "ceil",
+    "cellIndex",
+    "cellPadding",
+    "cellSpacing",
+    "cells",
+    "ch",
+    "chOff",
+    "chain",
+    "challenge",
+    "changeType",
+    "changed",
+    "changedTouches",
+    "channel",
+    "channelCount",
+    "channelCountMode",
+    "channelInterpretation",
+    "chapterInfo",
+    "char",
+    "charAt",
+    "charCode",
+    "charCodeAt",
+    "charIndex",
+    "charLength",
+    "characterBounds",
+    "characterBoundsRangeStart",
+    "characterData",
+    "characterDataOldValue",
+    "characterSet",
+    "characterVariant",
+    "characteristic",
+    "charging",
+    "chargingTime",
+    "charset",
+    "check",
+    "checkDCE",
+    "checkEnclosure",
+    "checkFramebufferStatus",
+    "checkIntersection",
+    "checkValidity",
+    "checkVisibility",
+    "checked",
+    "childElementCount",
+    "childList",
+    "childNodes",
+    "children",
+    "chrome",
+    "ciphertext",
+    "cite",
+    "city",
+    "claimInterface",
+    "claimed",
+    "classList",
+    "className",
+    "classid",
+    "clear",
+    "clearAppBadge",
+    "clearAttributes",
+    "clearBuffer",
+    "clearBufferfi",
+    "clearBufferfv",
+    "clearBufferiv",
+    "clearBufferuiv",
+    "clearColor",
+    "clearData",
+    "clearDepth",
+    "clearHalt",
+    "clearImmediate",
+    "clearInterval",
+    "clearLiveSeekableRange",
+    "clearMarks",
+    "clearMaxGCPauseAccumulator",
+    "clearMeasures",
+    "clearOriginJoinedAdInterestGroups",
+    "clearParameters",
+    "clearRect",
+    "clearResourceTimings",
+    "clearShadow",
+    "clearStencil",
+    "clearTimeout",
+    "clearValue",
+    "clearWatch",
+    "click",
+    "clickCount",
+    "clientDataJSON",
+    "clientHeight",
+    "clientInformation",
+    "clientLeft",
+    "clientRect",
+    "clientRects",
+    "clientTop",
+    "clientWaitSync",
+    "clientWidth",
+    "clientX",
+    "clientY",
+    "clip",
+    "clip-path",
+    "clip-rule",
+    "clipBottom",
+    "clipLeft",
+    "clipPath",
+    "clipPathUnits",
+    "clipRight",
+    "clipRule",
+    "clipTop",
+    "clipboard",
+    "clipboardData",
+    "clonable",
+    "clone",
+    "cloneContents",
+    "cloneNode",
+    "cloneRange",
+    "close",
+    "closeCode",
+    "closePath",
+    "closed",
+    "closedBy",
+    "closest",
+    "clz",
+    "clz32",
+    "cm",
+    "cmp",
+    "code",
+    "codeBase",
+    "codePointAt",
+    "codeType",
+    "codedHeight",
+    "codedRect",
+    "codedWidth",
+    "colSpan",
+    "collapse",
+    "collapseToEnd",
+    "collapseToStart",
+    "collapsed",
+    "collect",
+    "collections",
+    "colno",
+    "color",
+    "color-adjust",
+    "color-interpolation",
+    "color-interpolation-filters",
+    "color-scheme",
+    "colorAdjust",
+    "colorAttachments",
+    "colorDepth",
+    "colorFormats",
+    "colorInterpolation",
+    "colorInterpolationFilters",
+    "colorMask",
+    "colorScheme",
+    "colorSpace",
+    "colorType",
+    "cols",
+    "column-count",
+    "column-fill",
+    "column-gap",
+    "column-rule",
+    "column-rule-color",
+    "column-rule-style",
+    "column-rule-width",
+    "column-span",
+    "column-width",
+    "columnCount",
+    "columnFill",
+    "columnGap",
+    "columnNumber",
+    "columnRule",
+    "columnRuleColor",
+    "columnRuleStyle",
+    "columnRuleWidth",
+    "columnSpan",
+    "columnWidth",
+    "columns",
+    "command",
+    "commandForElement",
+    "commands",
+    "commit",
+    "commitLoadTime",
+    "commitPreferences",
+    "commitStyles",
+    "committed",
+    "commonAncestorContainer",
+    "compact",
+    "compare",
+    "compareBoundaryPoints",
+    "compareDocumentPosition",
+    "compareEndPoints",
+    "compareExchange",
+    "compareNode",
+    "comparePoint",
+    "compatMode",
+    "compatible",
+    "compile",
+    "compileShader",
+    "compileStreaming",
+    "complete",
+    "completed",
+    "component",
+    "componentFromPoint",
+    "composed",
+    "composedPath",
+    "composite",
+    "compositionEndOffset",
+    "compositionStartOffset",
+    "compressedTexImage2D",
+    "compressedTexImage3D",
+    "compressedTexSubImage2D",
+    "compressedTexSubImage3D",
+    "compute",
+    "computedStyleMap",
+    "concat",
+    "conditionText",
+    "coneInnerAngle",
+    "coneOuterAngle",
+    "coneOuterGain",
+    "config",
+    "configURL",
+    "configurable",
+    "configuration",
+    "configurationName",
+    "configurationValue",
+    "configurations",
+    "configure",
+    "confirm",
+    "confirmComposition",
+    "confirmSiteSpecificTrackingException",
+    "confirmWebWideTrackingException",
+    "congestionControl",
+    "connect",
+    "connectEnd",
+    "connectNative",
+    "connectShark",
+    "connectStart",
+    "connected",
+    "connectedCallback",
+    "connectedMoveCallback",
+    "connection",
+    "connectionInfo",
+    "connectionList",
+    "connectionSpeed",
+    "connectionState",
+    "connections",
+    "console",
+    "consolidate",
+    "constants",
+    "constraint",
+    "constrictionActive",
+    "construct",
+    "constructor",
+    "contactID",
+    "contain",
+    "contain-intrinsic-block-size",
+    "contain-intrinsic-height",
+    "contain-intrinsic-inline-size",
+    "contain-intrinsic-size",
+    "contain-intrinsic-width",
+    "containIntrinsicBlockSize",
+    "containIntrinsicHeight",
+    "containIntrinsicInlineSize",
+    "containIntrinsicSize",
+    "containIntrinsicWidth",
+    "container",
+    "container-name",
+    "container-type",
+    "containerId",
+    "containerName",
+    "containerQuery",
+    "containerSrc",
+    "containerType",
+    "contains",
+    "containsNode",
+    "content",
+    "content-visibility",
+    "contentBoxSize",
+    "contentDocument",
+    "contentEditable",
+    "contentEncoding",
+    "contentHint",
+    "contentOverflow",
+    "contentRect",
+    "contentScriptType",
+    "contentStyleType",
+    "contentType",
+    "contentVisibility",
+    "contentWindow",
+    "context",
+    "contextId",
+    "contextIds",
+    "contextMenu",
+    "contextMenus",
+    "contextType",
+    "contextTypes",
+    "contextmenu",
+    "contextualIdentities",
+    "continue",
+    "continuePrimaryKey",
+    "continuous",
+    "control",
+    "controlTransferIn",
+    "controlTransferOut",
+    "controller",
+    "controls",
+    "controlsList",
+    "convertPointFromNode",
+    "convertQuadFromNode",
+    "convertRectFromNode",
+    "convertToBlob",
+    "convertToSpecifiedUnits",
+    "cookie",
+    "cookieEnabled",
+    "cookieStore",
+    "cookies",
+    "coords",
+    "copyBufferSubData",
+    "copyBufferToBuffer",
+    "copyBufferToTexture",
+    "copyExternalImageToTexture",
+    "copyFromChannel",
+    "copyTexImage2D",
+    "copyTexSubImage2D",
+    "copyTexSubImage3D",
+    "copyTextureToBuffer",
+    "copyTextureToTexture",
+    "copyTo",
+    "copyToChannel",
+    "copyWithin",
+    "correspondingElement",
+    "correspondingUseElement",
+    "corruptedVideoFrames",
+    "cos",
+    "cosh",
+    "count",
+    "countReset",
+    "counter-increment",
+    "counter-reset",
+    "counter-set",
+    "counterIncrement",
+    "counterReset",
+    "counterSet",
+    "country",
+    "cpuClass",
+    "cpuSleepAllowed",
+    "cqb",
+    "cqh",
+    "cqi",
+    "cqmax",
+    "cqmin",
+    "cqw",
+    "create",
+    "createAnalyser",
+    "createAnchor",
+    "createAnswer",
+    "createAttribute",
+    "createAttributeNS",
+    "createAuctionNonce",
+    "createBidirectionalStream",
+    "createBindGroup",
+    "createBindGroupLayout",
+    "createBiquadFilter",
+    "createBuffer",
+    "createBufferSource",
+    "createCDATASection",
+    "createCSSStyleSheet",
+    "createCaption",
+    "createChannelMerger",
+    "createChannelSplitter",
+    "createCommandEncoder",
+    "createComment",
+    "createComputePipeline",
+    "createComputePipelineAsync",
+    "createConicGradient",
+    "createConstantSource",
+    "createContextualFragment",
+    "createControlRange",
+    "createConvolver",
+    "createDTMFSender",
+    "createDataChannel",
+    "createDelay",
+    "createDelayNode",
+    "createDocument",
+    "createDocumentFragment",
+    "createDocumentType",
+    "createDynamicsCompressor",
+    "createElement",
+    "createElementNS",
+    "createEncodedStreams",
+    "createEntityReference",
+    "createEvent",
+    "createEventObject",
+    "createExpression",
+    "createFramebuffer",
+    "createFunction",
+    "createGain",
+    "createGainNode",
+    "createHTML",
+    "createHTMLDocument",
+    "createIIRFilter",
+    "createImageBitmap",
+    "createImageData",
+    "createIndex",
+    "createJavaScriptNode",
+    "createLinearGradient",
+    "createMediaElementSource",
+    "createMediaKeys",
+    "createMediaStreamDestination",
+    "createMediaStreamSource",
+    "createMediaStreamTrackSource",
+    "createMutableFile",
+    "createNSResolver",
+    "createNodeIterator",
+    "createNotification",
+    "createObjectStore",
+    "createObjectURL",
+    "createOffer",
+    "createOscillator",
+    "createPanner",
+    "createPattern",
+    "createPeriodicWave",
+    "createPipelineLayout",
+    "createPolicy",
+    "createPopup",
+    "createProcessingInstruction",
+    "createProgram",
+    "createQuery",
+    "createQuerySet",
+    "createRadialGradient",
+    "createRange",
+    "createRangeCollection",
+    "createReader",
+    "createRenderBundleEncoder",
+    "createRenderPipeline",
+    "createRenderPipelineAsync",
+    "createRenderbuffer",
+    "createSVGAngle",
+    "createSVGLength",
+    "createSVGMatrix",
+    "createSVGNumber",
+    "createSVGPathSegArcAbs",
+    "createSVGPathSegArcRel",
+    "createSVGPathSegClosePath",
+    "createSVGPathSegCurvetoCubicAbs",
+    "createSVGPathSegCurvetoCubicRel",
+    "createSVGPathSegCurvetoCubicSmoothAbs",
+    "createSVGPathSegCurvetoCubicSmoothRel",
+    "createSVGPathSegCurvetoQuadraticAbs",
+    "createSVGPathSegCurvetoQuadraticRel",
+    "createSVGPathSegCurvetoQuadraticSmoothAbs",
+    "createSVGPathSegCurvetoQuadraticSmoothRel",
+    "createSVGPathSegLinetoAbs",
+    "createSVGPathSegLinetoHorizontalAbs",
+    "createSVGPathSegLinetoHorizontalRel",
+    "createSVGPathSegLinetoRel",
+    "createSVGPathSegLinetoVerticalAbs",
+    "createSVGPathSegLinetoVerticalRel",
+    "createSVGPathSegMovetoAbs",
+    "createSVGPathSegMovetoRel",
+    "createSVGPoint",
+    "createSVGRect",
+    "createSVGTransform",
+    "createSVGTransformFromMatrix",
+    "createSampler",
+    "createScript",
+    "createScriptProcessor",
+    "createScriptURL",
+    "createSession",
+    "createShader",
+    "createShaderModule",
+    "createShadowRoot",
+    "createStereoPanner",
+    "createStyleSheet",
+    "createTBody",
+    "createTFoot",
+    "createTHead",
+    "createTask",
+    "createTextNode",
+    "createTextRange",
+    "createTexture",
+    "createTouch",
+    "createTouchList",
+    "createTransformFeedback",
+    "createTreeWalker",
+    "createUnidirectionalStream",
+    "createVertexArray",
+    "createView",
+    "createWaveShaper",
+    "createWorklet",
+    "createWritable",
+    "creationTime",
+    "credentialless",
+    "credentials",
+    "criticalCHRestart",
+    "cropTo",
+    "crossOrigin",
+    "crossOriginIsolated",
+    "crypto",
+    "csi",
+    "csp",
+    "cssFloat",
+    "cssRules",
+    "cssText",
+    "cssValueType",
+    "ctrlKey",
+    "ctrlLeft",
+    "cues",
+    "cullFace",
+    "cullMode",
+    "currentCSSZoom",
+    "currentDirection",
+    "currentEntry",
+    "currentLocalDescription",
+    "currentNode",
+    "currentPage",
+    "currentRect",
+    "currentRemoteDescription",
+    "currentScale",
+    "currentScreen",
+    "currentScript",
+    "currentSrc",
+    "currentState",
+    "currentStyle",
+    "currentTarget",
+    "currentTime",
+    "currentTranslate",
+    "currentView",
+    "cursor",
+    "curve",
+    "customElements",
+    "customError",
+    "cx",
+    "cy",
+    "d",
+    "data",
+    "dataFld",
+    "dataFormatAs",
+    "dataLoss",
+    "dataLossMessage",
+    "dataPageSize",
+    "dataSrc",
+    "dataTransfer",
+    "database",
+    "databases",
+    "datagrams",
+    "dataset",
+    "dateStyle",
+    "dateTime",
+    "day",
+    "dayPeriod",
+    "days",
+    "db",
+    "debug",
+    "debuggerEnabled",
+    "declarativeNetRequest",
+    "declare",
+    "decode",
+    "decodeAudioData",
+    "decodeQueueSize",
+    "decodeURI",
+    "decodeURIComponent",
+    "decodedBodySize",
+    "decoding",
+    "decodingInfo",
+    "decreaseZoomLevel",
+    "decrypt",
+    "default",
+    "defaultCharset",
+    "defaultChecked",
+    "defaultMuted",
+    "defaultPlaybackRate",
+    "defaultPolicy",
+    "defaultPrevented",
+    "defaultQueue",
+    "defaultRequest",
+    "defaultSelected",
+    "defaultStatus",
+    "defaultURL",
+    "defaultValue",
+    "defaultView",
+    "defaultstatus",
+    "defer",
+    "define",
+    "defineMagicFunction",
+    "defineMagicVariable",
+    "defineProperties",
+    "defineProperty",
+    "deg",
+    "delay",
+    "delayTime",
+    "delegatesFocus",
+    "delete",
+    "deleteBuffer",
+    "deleteCaption",
+    "deleteCell",
+    "deleteContents",
+    "deleteData",
+    "deleteDatabase",
+    "deleteFramebuffer",
+    "deleteFromDocument",
+    "deleteIndex",
+    "deleteMedium",
+    "deleteObjectStore",
+    "deleteProgram",
+    "deleteProperty",
+    "deleteQuery",
+    "deleteRenderbuffer",
+    "deleteRow",
+    "deleteRule",
+    "deleteSampler",
+    "deleteShader",
+    "deleteSync",
+    "deleteTFoot",
+    "deleteTHead",
+    "deleteTexture",
+    "deleteTransformFeedback",
+    "deleteVertexArray",
+    "deleted",
+    "deliverChangeRecords",
+    "deliveredFrames",
+    "deliveredFramesDuration",
+    "delivery",
+    "deliveryInfo",
+    "deliveryStatus",
+    "deliveryTimestamp",
+    "deliveryType",
+    "delta",
+    "deltaMode",
+    "deltaX",
+    "deltaY",
+    "deltaZ",
+    "dependentLocality",
+    "deprecatedReplaceInURN",
+    "deprecatedRunAdAuctionEnforcesKAnonymity",
+    "deprecatedURNToURL",
+    "depthActive",
+    "depthBias",
+    "depthBiasClamp",
+    "depthBiasSlopeScale",
+    "depthClearValue",
+    "depthCompare",
+    "depthDataFormat",
+    "depthFailOp",
+    "depthFar",
+    "depthFunc",
+    "depthLoadOp",
+    "depthMask",
+    "depthNear",
+    "depthOrArrayLayers",
+    "depthRange",
+    "depthReadOnly",
+    "depthStencil",
+    "depthStencilAttachment",
+    "depthStencilFormat",
+    "depthStoreOp",
+    "depthType",
+    "depthUsage",
+    "depthWriteEnabled",
+    "deref",
+    "deriveBits",
+    "deriveKey",
+    "descentOverride",
+    "description",
+    "deselectAll",
+    "designMode",
+    "desiredSize",
+    "destination",
+    "destinationURL",
+    "destroy",
+    "detach",
+    "detachEvent",
+    "detachShader",
+    "detached",
+    "detail",
+    "details",
+    "detect",
+    "detectLanguage",
+    "detune",
+    "device",
+    "deviceClass",
+    "deviceId",
+    "deviceMemory",
+    "devicePixelContentBoxSize",
+    "devicePixelRatio",
+    "devicePosture",
+    "deviceProtocol",
+    "deviceSubclass",
+    "deviceVersionMajor",
+    "deviceVersionMinor",
+    "deviceVersionSubminor",
+    "deviceXDPI",
+    "deviceYDPI",
+    "devtools",
+    "devtools_panels",
+    "didTimeout",
+    "difference",
+    "diffuseConstant",
+    "digest",
+    "dimension",
+    "dimensions",
+    "dir",
+    "dirName",
+    "direction",
+    "dirxml",
+    "disable",
+    "disablePictureInPicture",
+    "disableRemotePlayback",
+    "disableVertexAttribArray",
+    "disabled",
+    "discard",
+    "discardedFrames",
+    "dischargingTime",
+    "disconnect",
+    "disconnectShark",
+    "disconnectedCallback",
+    "dispatchEvent",
+    "dispatchWorkgroups",
+    "dispatchWorkgroupsIndirect",
+    "display",
+    "displayHeight",
+    "displayId",
+    "displayName",
+    "displayWidth",
+    "dispose",
+    "disposeAsync",
+    "disposed",
+    "disposition",
+    "distanceModel",
+    "div",
+    "divisor",
+    "djsapi",
+    "djsproxy",
+    "dns",
+    "doImport",
+    "doNotTrack",
+    "doScroll",
+    "doctype",
+    "document",
+    "documentElement",
+    "documentId",
+    "documentIds",
+    "documentLifecycle",
+    "documentMode",
+    "documentOrigin",
+    "documentOrigins",
+    "documentPictureInPicture",
+    "documentURI",
+    "documentURL",
+    "documentUrl",
+    "documentUrls",
+    "dolphin",
+    "dolphinGameCenter",
+    "dolphininfo",
+    "dolphinmeta",
+    "dom",
+    "domComplete",
+    "domContentLoadedEventEnd",
+    "domContentLoadedEventStart",
+    "domInteractive",
+    "domLoading",
+    "domOverlayState",
+    "domain",
+    "domainLookupEnd",
+    "domainLookupStart",
+    "dominant-baseline",
+    "dominantBaseline",
+    "done",
+    "dopplerFactor",
+    "dotAll",
+    "downDegrees",
+    "downlink",
+    "download",
+    "downloadRequest",
+    "downloadTotal",
+    "downloaded",
+    "downloads",
+    "dpcm",
+    "dpi",
+    "dppx",
+    "dragDrop",
+    "draggable",
+    "draw",
+    "drawArrays",
+    "drawArraysInstanced",
+    "drawArraysInstancedANGLE",
+    "drawBuffers",
+    "drawCustomFocusRing",
+    "drawElements",
+    "drawElementsInstanced",
+    "drawElementsInstancedANGLE",
+    "drawFocusIfNeeded",
+    "drawImage",
+    "drawImageFromRect",
+    "drawIndexed",
+    "drawIndexedIndirect",
+    "drawIndirect",
+    "drawRangeElements",
+    "drawSystemFocusRing",
+    "drawingBufferColorSpace",
+    "drawingBufferFormat",
+    "drawingBufferHeight",
+    "drawingBufferStorage",
+    "drawingBufferWidth",
+    "drop",
+    "dropEffect",
+    "droppedVideoFrames",
+    "dropzone",
+    "dstFactor",
+    "dtmf",
+    "dump",
+    "dumpProfile",
+    "duplex",
+    "duplicate",
+    "durability",
+    "duration",
+    "dvb",
+    "dvh",
+    "dvi",
+    "dvmax",
+    "dvmin",
+    "dvname",
+    "dvnum",
+    "dvw",
+    "dx",
+    "dy",
+    "dynamicId",
+    "dynsrc",
+    "e",
+    "edgeMode",
+    "editContext",
+    "effect",
+    "effectAllowed",
+    "effectiveDirective",
+    "effectiveType",
+    "effects",
+    "elapsedTime",
+    "element",
+    "elementFromPoint",
+    "elementTiming",
+    "elements",
+    "elementsFromPoint",
+    "elevation",
+    "ellipse",
+    "em",
+    "emHeightAscent",
+    "emHeightDescent",
+    "email",
+    "embeds",
+    "emit",
+    "emma",
+    "empty",
+    "empty-cells",
+    "emptyCells",
+    "emptyHTML",
+    "emptyScript",
+    "emulatedPosition",
+    "enable",
+    "enableBackground",
+    "enableDelegations",
+    "enableStyleSheetsForSet",
+    "enableVertexAttribArray",
+    "enabled",
+    "enabledFeatures",
+    "enabledPlugin",
+    "encode",
+    "encodeInto",
+    "encodeQueueSize",
+    "encodeURI",
+    "encodeURIComponent",
+    "encodedBodySize",
+    "encoding",
+    "encodingInfo",
+    "encrypt",
+    "enctype",
+    "end",
+    "endContainer",
+    "endElement",
+    "endElementAt",
+    "endOcclusionQuery",
+    "endOfPassWriteIndex",
+    "endOfStream",
+    "endOffset",
+    "endQuery",
+    "endTime",
+    "endTransformFeedback",
+    "ended",
+    "endpoint",
+    "endpointNumber",
+    "endpoints",
+    "endsWith",
+    "enqueue",
+    "enterKeyHint",
+    "entities",
+    "entries",
+    "entry",
+    "entryPoint",
+    "entryType",
+    "enumerable",
+    "enumerate",
+    "enumerateDevices",
+    "enumerateEditable",
+    "environmentBlendMode",
+    "equals",
+    "era",
+    "error",
+    "errorCode",
+    "errorDetail",
+    "errorText",
+    "escape",
+    "estimate",
+    "eval",
+    "evaluate",
+    "event",
+    "eventCounts",
+    "eventPhase",
+    "events",
+    "every",
+    "ex",
+    "exception",
+    "exchange",
+    "exec",
+    "execCommand",
+    "execCommandShowHelp",
+    "execScript",
+    "executeBundles",
+    "executionStart",
+    "exitFullscreen",
+    "exitPictureInPicture",
+    "exitPointerLock",
+    "exitPresent",
+    "exp",
+    "expand",
+    "expandEntityReferences",
+    "expando",
+    "expansion",
+    "expectedContextLanguages",
+    "expectedImprovement",
+    "expectedInputLanguages",
+    "experiments",
+    "expiration",
+    "expirationTime",
+    "expires",
+    "expiryDate",
+    "explicitOriginalTarget",
+    "expm1",
+    "exponent",
+    "exponentialRampToValueAtTime",
+    "exportKey",
+    "exports",
+    "extend",
+    "extension",
+    "extensionTypes",
+    "extensions",
+    "extentNode",
+    "extentOffset",
+    "external",
+    "externalResourcesRequired",
+    "externalTexture",
+    "extractContents",
+    "extractable",
+    "eye",
+    "f",
+    "f16round",
+    "face",
+    "factoryReset",
+    "failOp",
+    "failureReason",
+    "fallback",
+    "family",
+    "familyName",
+    "farthestViewportElement",
+    "fastSeek",
+    "fatal",
+    "featureId",
+    "featurePolicy",
+    "featureSettings",
+    "features",
+    "fence",
+    "fenceSync",
+    "fetch",
+    "fetchLater",
+    "fetchPriority",
+    "fetchStart",
+    "fftSize",
+    "fgColor",
+    "fieldOfView",
+    "file",
+    "fileCreatedDate",
+    "fileHandle",
+    "fileModifiedDate",
+    "fileName",
+    "fileSize",
+    "fileUpdatedDate",
+    "filename",
+    "files",
+    "filesystem",
+    "fill",
+    "fill-opacity",
+    "fill-rule",
+    "fillJointRadii",
+    "fillLightMode",
+    "fillOpacity",
+    "fillPoses",
+    "fillRect",
+    "fillRule",
+    "fillStyle",
+    "fillText",
+    "filter",
+    "filterResX",
+    "filterResY",
+    "filterUnits",
+    "filters",
+    "finalResponseHeadersStart",
+    "finally",
+    "find",
+    "findIndex",
+    "findLast",
+    "findLastIndex",
+    "findRule",
+    "findText",
+    "finish",
+    "finishDocumentLoadTime",
+    "finishLoadTime",
+    "finished",
+    "fireEvent",
+    "firesTouchEvents",
+    "first",
+    "firstChild",
+    "firstElementChild",
+    "firstInterimResponseStart",
+    "firstPage",
+    "firstPaintAfterLoadTime",
+    "firstPaintTime",
+    "firstUIEventTimestamp",
+    "fixed",
+    "flags",
+    "flat",
+    "flatMap",
+    "flex",
+    "flex-basis",
+    "flex-direction",
+    "flex-flow",
+    "flex-grow",
+    "flex-shrink",
+    "flex-wrap",
+    "flexBasis",
+    "flexDirection",
+    "flexFlow",
+    "flexGrow",
+    "flexShrink",
+    "flexWrap",
+    "flip",
+    "flipX",
+    "flipY",
+    "float",
+    "float32",
+    "float64",
+    "flood-color",
+    "flood-opacity",
+    "floodColor",
+    "floodOpacity",
+    "floor",
+    "flush",
+    "focus",
+    "focusNode",
+    "focusOffset",
+    "font",
+    "font-family",
+    "font-feature-settings",
+    "font-kerning",
+    "font-language-override",
+    "font-optical-sizing",
+    "font-palette",
+    "font-size",
+    "font-size-adjust",
+    "font-stretch",
+    "font-style",
+    "font-synthesis",
+    "font-synthesis-position",
+    "font-synthesis-small-caps",
+    "font-synthesis-style",
+    "font-synthesis-weight",
+    "font-variant",
+    "font-variant-alternates",
+    "font-variant-caps",
+    "font-variant-east-asian",
+    "font-variant-ligatures",
+    "font-variant-numeric",
+    "font-variant-position",
+    "font-variation-settings",
+    "font-weight",
+    "fontBoundingBoxAscent",
+    "fontBoundingBoxDescent",
+    "fontFamily",
+    "fontFeatureSettings",
+    "fontKerning",
+    "fontLanguageOverride",
+    "fontOpticalSizing",
+    "fontPalette",
+    "fontSize",
+    "fontSizeAdjust",
+    "fontSmoothingEnabled",
+    "fontStretch",
+    "fontStyle",
+    "fontSynthesis",
+    "fontSynthesisPosition",
+    "fontSynthesisSmallCaps",
+    "fontSynthesisStyle",
+    "fontSynthesisWeight",
+    "fontVariant",
+    "fontVariantAlternates",
+    "fontVariantCaps",
+    "fontVariantEastAsian",
+    "fontVariantEmoji",
+    "fontVariantLigatures",
+    "fontVariantNumeric",
+    "fontVariantPosition",
+    "fontVariationSettings",
+    "fontWeight",
+    "fontcolor",
+    "fontfaces",
+    "fonts",
+    "fontsize",
+    "for",
+    "forEach",
+    "force",
+    "forceFallbackAdapter",
+    "forceRedraw",
+    "forced-color-adjust",
+    "forcedColorAdjust",
+    "forcedStyleAndLayoutDuration",
+    "forget",
+    "form",
+    "formAction",
+    "formData",
+    "formEnctype",
+    "formMethod",
+    "formNoValidate",
+    "formTarget",
+    "format",
+    "formatToParts",
+    "forms",
+    "forward",
+    "forwardWheel",
+    "forwardX",
+    "forwardY",
+    "forwardZ",
+    "foundation",
+    "fr",
+    "fractionalSecondDigits",
+    "fragment",
+    "fragmentDirective",
+    "frame",
+    "frameBorder",
+    "frameCount",
+    "frameElement",
+    "frameId",
+    "frameIds",
+    "frameSpacing",
+    "framebuffer",
+    "framebufferHeight",
+    "framebufferRenderbuffer",
+    "framebufferTexture2D",
+    "framebufferTextureLayer",
+    "framebufferWidth",
+    "frames",
+    "freeSpace",
+    "freeze",
+    "frequency",
+    "frequencyBinCount",
+    "from",
+    "fromAsync",
+    "fromBase64",
+    "fromCharCode",
+    "fromCodePoint",
+    "fromElement",
+    "fromEntries",
+    "fromFloat32Array",
+    "fromFloat64Array",
+    "fromHex",
+    "fromMatrix",
+    "fromPoint",
+    "fromQuad",
+    "fromRect",
+    "frontFace",
+    "fround",
+    "fullName",
+    "fullPath",
+    "fullRange",
+    "fullScreen",
+    "fullVersionList",
+    "fullscreen",
+    "fullscreenElement",
+    "fullscreenEnabled",
+    "fx",
+    "fy",
+    "g",
+    "gain",
+    "gamepad",
+    "gamma",
+    "gap",
+    "gatheringState",
+    "gatt",
+    "geckoProfiler",
+    "genderIdentity",
+    "generateCertificate",
+    "generateKey",
+    "generateMipmap",
+    "generateRequest",
+    "geolocation",
+    "gestureObject",
+    "get",
+    "getAcceptLanguages",
+    "getActiveAttrib",
+    "getActiveUniform",
+    "getActiveUniformBlockName",
+    "getActiveUniformBlockParameter",
+    "getActiveUniforms",
+    "getAdjacentText",
+    "getAll",
+    "getAllKeys",
+    "getAllRecords",
+    "getAllResponseHeaders",
+    "getAllowlistForFeature",
+    "getAnimations",
+    "getAsFile",
+    "getAsFileSystemHandle",
+    "getAsString",
+    "getAttachedShaders",
+    "getAttribLocation",
+    "getAttribute",
+    "getAttributeNS",
+    "getAttributeNames",
+    "getAttributeNode",
+    "getAttributeNodeNS",
+    "getAttributeType",
+    "getAudioTracks",
+    "getAuthenticatorData",
+    "getAutoplayPolicy",
+    "getAvailability",
+    "getBBox",
+    "getBackgroundPage",
+    "getBadgeBackgroundColor",
+    "getBadgeText",
+    "getBadgeTextColor",
+    "getBattery",
+    "getBigInt64",
+    "getBigUint64",
+    "getBindGroupLayout",
+    "getBlob",
+    "getBookmark",
+    "getBoundingClientRect",
+    "getBounds",
+    "getBoxQuads",
+    "getBrowserInfo",
+    "getBufferParameter",
+    "getBufferSubData",
+    "getByteFrequencyData",
+    "getByteTimeDomainData",
+    "getCSSCanvasContext",
+    "getCTM",
+    "getCameraImage",
+    "getCandidateWindowClientRect",
+    "getCanonicalLocales",
+    "getCapabilities",
+    "getCaptureHandle",
+    "getChannelData",
+    "getCharNumAtPosition",
+    "getCharacteristic",
+    "getCharacteristics",
+    "getClientCapabilities",
+    "getClientExtensionResults",
+    "getClientRect",
+    "getClientRects",
+    "getCoalescedEvents",
+    "getCompilationInfo",
+    "getComposedRanges",
+    "getCompositionAlternatives",
+    "getComputedStyle",
+    "getComputedTextLength",
+    "getComputedTiming",
+    "getConfiguration",
+    "getConstraints",
+    "getContext",
+    "getContextAttributes",
+    "getContexts",
+    "getContributingSources",
+    "getCounterValue",
+    "getCueAsHTML",
+    "getCueById",
+    "getCurrent",
+    "getCurrentPosition",
+    "getCurrentTexture",
+    "getCurrentTime",
+    "getData",
+    "getDatabaseNames",
+    "getDate",
+    "getDay",
+    "getDefaultComputedStyle",
+    "getDepthInMeters",
+    "getDepthInformation",
+    "getDescriptor",
+    "getDescriptors",
+    "getDestinationInsertionPoints",
+    "getDevices",
+    "getDirectory",
+    "getDirectoryHandle",
+    "getDisplayMedia",
+    "getDistributedNodes",
+    "getEditable",
+    "getElementById",
+    "getElementsByClassName",
+    "getElementsByName",
+    "getElementsByTagName",
+    "getElementsByTagNameNS",
+    "getEnclosureList",
+    "getEndPositionOfChar",
+    "getEntries",
+    "getEntriesByName",
+    "getEntriesByType",
+    "getError",
+    "getExtension",
+    "getExtentOfChar",
+    "getEyeParameters",
+    "getFeature",
+    "getFiberRoots",
+    "getFile",
+    "getFileHandle",
+    "getFiles",
+    "getFilesAndDirectories",
+    "getFingerprints",
+    "getFloat16",
+    "getFloat32",
+    "getFloat64",
+    "getFloatFrequencyData",
+    "getFloatTimeDomainData",
+    "getFloatValue",
+    "getFragDataLocation",
+    "getFrameData",
+    "getFrameId",
+    "getFramebufferAttachmentParameter",
+    "getFrequencyResponse",
+    "getFullYear",
+    "getGamepads",
+    "getHTML",
+    "getHeaderExtensionsToNegotiate",
+    "getHighEntropyValues",
+    "getHitTestResults",
+    "getHitTestResultsForTransientInput",
+    "getHours",
+    "getIdentityAssertion",
+    "getIds",
+    "getImageData",
+    "getIndexedParameter",
+    "getInfo",
+    "getInnerHTML",
+    "getInstalledRelatedApps",
+    "getInt16",
+    "getInt32",
+    "getInt8",
+    "getInterestGroupAdAuctionData",
+    "getInternalModuleRanges",
+    "getInternalformatParameter",
+    "getIntersectionList",
+    "getItem",
+    "getItems",
+    "getJointPose",
+    "getKey",
+    "getKeyframes",
+    "getLastFocused",
+    "getLayers",
+    "getLayoutMap",
+    "getLightEstimate",
+    "getLineDash",
+    "getLocalCandidates",
+    "getLocalParameters",
+    "getLocalStreams",
+    "getManagedConfiguration",
+    "getManifest",
+    "getMappedRange",
+    "getMarks",
+    "getMatchedCSSRules",
+    "getMaxGCPauseSinceClear",
+    "getMeasures",
+    "getMessage",
+    "getMetadata",
+    "getMilliseconds",
+    "getMinutes",
+    "getModifierState",
+    "getMonth",
+    "getName",
+    "getNamedItem",
+    "getNamedItemNS",
+    "getNativeFramebufferScaleFactor",
+    "getNegotiatedHeaderExtensions",
+    "getNestedConfigs",
+    "getNotifications",
+    "getNotifier",
+    "getNumberOfChars",
+    "getOffsetReferenceSpace",
+    "getOrInsert",
+    "getOrInsertComputed",
+    "getOutputTimestamp",
+    "getOverrideHistoryNavigationMode",
+    "getOverrideStyle",
+    "getOwnPropertyDescriptor",
+    "getOwnPropertyDescriptors",
+    "getOwnPropertyNames",
+    "getOwnPropertySymbols",
+    "getPackageDirectoryEntry",
+    "getParameter",
+    "getParameters",
+    "getParent",
+    "getPathData",
+    "getPathSegAtLength",
+    "getPathSegmentAtLength",
+    "getPermissionWarningsByManifest",
+    "getPhotoCapabilities",
+    "getPhotoSettings",
+    "getPlatformInfo",
+    "getPointAtLength",
+    "getPopup",
+    "getPorts",
+    "getPose",
+    "getPredictedEvents",
+    "getPreference",
+    "getPreferenceDefault",
+    "getPreferredCanvasFormat",
+    "getPresentationAttribute",
+    "getPreventDefault",
+    "getPrimaryService",
+    "getPrimaryServices",
+    "getProgramInfoLog",
+    "getProgramParameter",
+    "getPropertyCSSValue",
+    "getPropertyPriority",
+    "getPropertyShorthand",
+    "getPropertyType",
+    "getPropertyValue",
+    "getPrototypeOf",
+    "getPublicKey",
+    "getPublicKeyAlgorithm",
+    "getQuery",
+    "getQueryParameter",
+    "getRGBColorValue",
+    "getRandomValues",
+    "getRangeAt",
+    "getReader",
+    "getReceivers",
+    "getRectValue",
+    "getReflectionCubeMap",
+    "getRegistration",
+    "getRegistrations",
+    "getRemoteCandidates",
+    "getRemoteCertificates",
+    "getRemoteParameters",
+    "getRemoteStreams",
+    "getRenderbufferParameter",
+    "getResponseHeader",
+    "getRoot",
+    "getRootNode",
+    "getRotationOfChar",
+    "getSVGDocument",
+    "getSamplerParameter",
+    "getScreenCTM",
+    "getScreenDetails",
+    "getSeconds",
+    "getSelectedCandidatePair",
+    "getSelection",
+    "getSelf",
+    "getSenders",
+    "getService",
+    "getSetCookie",
+    "getSettings",
+    "getShaderInfoLog",
+    "getShaderParameter",
+    "getShaderPrecisionFormat",
+    "getShaderSource",
+    "getSignals",
+    "getSimpleDuration",
+    "getSiteIcons",
+    "getSources",
+    "getSpeculativeParserUrls",
+    "getStartPositionOfChar",
+    "getStartTime",
+    "getState",
+    "getStats",
+    "getStatusForPolicy",
+    "getStorageUpdates",
+    "getStreamById",
+    "getStringValue",
+    "getSubStringLength",
+    "getSubscription",
+    "getSubscriptions",
+    "getSupportedConstraints",
+    "getSupportedExtensions",
+    "getSupportedFormats",
+    "getSupportedZoomLevels",
+    "getSyncParameter",
+    "getSynchronizationSources",
+    "getTags",
+    "getTargetRanges",
+    "getTexParameter",
+    "getTextFormats",
+    "getTime",
+    "getTimezoneOffset",
+    "getTiming",
+    "getTitle",
+    "getTitlebarAreaRect",
+    "getTotalLength",
+    "getTrackById",
+    "getTracks",
+    "getTransceivers",
+    "getTransform",
+    "getTransformFeedbackVarying",
+    "getTransformToElement",
+    "getTransports",
+    "getType",
+    "getTypeMapping",
+    "getUILanguage",
+    "getURL",
+    "getUTCDate",
+    "getUTCDay",
+    "getUTCFullYear",
+    "getUTCHours",
+    "getUTCMilliseconds",
+    "getUTCMinutes",
+    "getUTCMonth",
+    "getUTCSeconds",
+    "getUint16",
+    "getUint32",
+    "getUint8",
+    "getUniform",
+    "getUniformBlockIndex",
+    "getUniformIndices",
+    "getUniformLocation",
+    "getUserInfo",
+    "getUserMedia",
+    "getUserSettings",
+    "getVRDisplays",
+    "getValues",
+    "getVarDate",
+    "getVariableValue",
+    "getVertexAttrib",
+    "getVertexAttribOffset",
+    "getVideoPlaybackQuality",
+    "getVideoTracks",
+    "getViewerPose",
+    "getViewport",
+    "getViews",
+    "getVoices",
+    "getWakeLockState",
+    "getWriter",
+    "getYear",
+    "getZoom",
+    "getZoomSettings",
+    "givenName",
+    "global",
+    "globalAlpha",
+    "globalCompositeOperation",
+    "globalPrivacyControl",
+    "globalThis",
+    "glyphOrientationHorizontal",
+    "glyphOrientationVertical",
+    "glyphRef",
+    "go",
+    "goBack",
+    "goForward",
+    "gpu",
+    "grabFrame",
+    "grad",
+    "gradientTransform",
+    "gradientUnits",
+    "grammars",
+    "green",
+    "grid",
+    "grid-area",
+    "grid-auto-columns",
+    "grid-auto-flow",
+    "grid-auto-rows",
+    "grid-column",
+    "grid-column-end",
+    "grid-column-gap",
+    "grid-column-start",
+    "grid-gap",
+    "grid-row",
+    "grid-row-end",
+    "grid-row-gap",
+    "grid-row-start",
+    "grid-template",
+    "grid-template-areas",
+    "grid-template-columns",
+    "grid-template-rows",
+    "gridArea",
+    "gridAutoColumns",
+    "gridAutoFlow",
+    "gridAutoRows",
+    "gridColumn",
+    "gridColumnEnd",
+    "gridColumnGap",
+    "gridColumnStart",
+    "gridGap",
+    "gridRow",
+    "gridRowEnd",
+    "gridRowGap",
+    "gridRowStart",
+    "gridTemplate",
+    "gridTemplateAreas",
+    "gridTemplateColumns",
+    "gridTemplateRows",
+    "gripSpace",
+    "group",
+    "groupBy",
+    "groupCollapsed",
+    "groupEnd",
+    "groupId",
+    "groups",
+    "grow",
+    "growable",
+    "guestProcessId",
+    "guestRenderFrameRoutingId",
+    "hadRecentInput",
+    "hand",
+    "handedness",
+    "hangingBaseline",
+    "hapticActuators",
+    "hardwareConcurrency",
+    "has",
+    "hasAttribute",
+    "hasAttributeNS",
+    "hasAttributes",
+    "hasBeenActive",
+    "hasChildNodes",
+    "hasComposition",
+    "hasDynamicOffset",
+    "hasEnrolledInstrument",
+    "hasExtension",
+    "hasExternalDisplay",
+    "hasFeature",
+    "hasFocus",
+    "hasIndices",
+    "hasInstance",
+    "hasLayout",
+    "hasOrientation",
+    "hasOwn",
+    "hasOwnProperty",
+    "hasPointerCapture",
+    "hasPosition",
+    "hasPrivateToken",
+    "hasReading",
+    "hasRedemptionRecord",
+    "hasRegExpGroups",
+    "hasStorageAccess",
+    "hasUAVisualTransition",
+    "hasUnpartitionedCookieAccess",
+    "hash",
+    "hashChange",
+    "head",
+    "headers",
+    "heading",
+    "height",
+    "hid",
+    "hidden",
+    "hide",
+    "hideFocus",
+    "hidePopover",
+    "high",
+    "highWaterMark",
+    "highlight",
+    "highlights",
+    "highlightsFromPoint",
+    "hint",
+    "hints",
+    "history",
+    "honorificPrefix",
+    "honorificSuffix",
+    "horizontalOverflow",
+    "host",
+    "hostCandidate",
+    "hostname",
+    "hour",
+    "hour12",
+    "hourCycle",
+    "hours",
+    "href",
+    "hrefTranslate",
+    "hreflang",
+    "hspace",
+    "html5TagCheckInerface",
+    "htmlFor",
+    "htmlText",
+    "httpEquiv",
+    "httpRequestStatusCode",
+    "hwTimestamp",
+    "hyphenate-character",
+    "hyphenateCharacter",
+    "hyphenateLimitChars",
+    "hyphens",
+    "hypot",
+    "i18n",
+    "ic",
+    "iccId",
+    "iceConnectionState",
+    "iceGatheringState",
+    "iceTransport",
+    "icon",
+    "iconURL",
+    "id",
+    "identifier",
+    "identity",
+    "ideographicBaseline",
+    "idle",
+    "idpLoginUrl",
+    "ignoreBOM",
+    "ignoreCase",
+    "ignoreDepthValues",
+    "image",
+    "image-orientation",
+    "image-rendering",
+    "imageHeight",
+    "imageOrientation",
+    "imageRendering",
+    "imageSizes",
+    "imageSmoothingEnabled",
+    "imageSmoothingQuality",
+    "imageSrcset",
+    "imageWidth",
+    "images",
+    "ime-mode",
+    "imeMode",
+    "implementation",
+    "importExternalTexture",
+    "importKey",
+    "importNode",
+    "importStylesheet",
+    "imports",
+    "impp",
+    "imul",
+    "in",
+    "in1",
+    "in2",
+    "inBandMetadataTrackDispatchType",
+    "inIncognitoContext",
+    "inRange",
+    "includes",
+    "incognito",
+    "incomingBidirectionalStreams",
+    "incomingHighWaterMark",
+    "incomingMaxAge",
+    "incomingUnidirectionalStreams",
+    "increaseZoomLevel",
+    "incremental",
+    "indeterminate",
+    "index",
+    "indexNames",
+    "indexOf",
+    "indexedDB",
+    "indicate",
+    "indices",
+    "inert",
+    "inertiaDestinationX",
+    "inertiaDestinationY",
+    "info",
+    "inherits",
+    "init",
+    "initAnimationEvent",
+    "initBeforeLoadEvent",
+    "initClipboardEvent",
+    "initCloseEvent",
+    "initCommandEvent",
+    "initCompositionEvent",
+    "initCustomEvent",
+    "initData",
+    "initDataType",
+    "initDeviceMotionEvent",
+    "initDeviceOrientationEvent",
+    "initDragEvent",
+    "initErrorEvent",
+    "initEvent",
+    "initFocusEvent",
+    "initGestureEvent",
+    "initHashChangeEvent",
+    "initKeyEvent",
+    "initKeyboardEvent",
+    "initMSManipulationEvent",
+    "initMessageEvent",
+    "initMouseEvent",
+    "initMouseScrollEvent",
+    "initMouseWheelEvent",
+    "initMutationEvent",
+    "initNSMouseEvent",
+    "initOverflowEvent",
+    "initPageEvent",
+    "initPageTransitionEvent",
+    "initPointerEvent",
+    "initPopStateEvent",
+    "initProgressEvent",
+    "initScrollAreaEvent",
+    "initSimpleGestureEvent",
+    "initStorageEvent",
+    "initTextEvent",
+    "initTimeEvent",
+    "initTouchEvent",
+    "initTransitionEvent",
+    "initUIEvent",
+    "initWebKitAnimationEvent",
+    "initWebKitTransitionEvent",
+    "initWebKitWheelEvent",
+    "initWheelEvent",
+    "initialTime",
+    "initialValue",
+    "initialize",
+    "initiatorType",
+    "inject",
+    "ink",
+    "inline-size",
+    "inlineSize",
+    "inlineVerticalFieldOfView",
+    "inner",
+    "innerHTML",
+    "innerHeight",
+    "innerText",
+    "innerWidth",
+    "input",
+    "inputBuffer",
+    "inputEncoding",
+    "inputMethod",
+    "inputMode",
+    "inputQuota",
+    "inputSource",
+    "inputSources",
+    "inputType",
+    "inputs",
+    "insertAdjacentElement",
+    "insertAdjacentHTML",
+    "insertAdjacentText",
+    "insertBefore",
+    "insertCell",
+    "insertDTMF",
+    "insertData",
+    "insertDebugMarker",
+    "insertItemBefore",
+    "insertNode",
+    "insertRow",
+    "insertRule",
+    "inset",
+    "inset-block",
+    "inset-block-end",
+    "inset-block-start",
+    "inset-inline",
+    "inset-inline-end",
+    "inset-inline-start",
+    "insetBlock",
+    "insetBlockEnd",
+    "insetBlockStart",
+    "insetInline",
+    "insetInlineEnd",
+    "insetInlineStart",
+    "inspect",
+    "install",
+    "installing",
+    "instanceRoot",
+    "instantiate",
+    "instantiateStreaming",
+    "instruments",
+    "int16",
+    "int32",
+    "int8",
+    "integrity",
+    "interactionCount",
+    "interactionId",
+    "interactionMode",
+    "intercept",
+    "interestForElement",
+    "interfaceClass",
+    "interfaceName",
+    "interfaceNumber",
+    "interfaceProtocol",
+    "interfaceSubclass",
+    "interfaces",
+    "interimResults",
+    "internalSubset",
+    "interpretation",
+    "intersection",
+    "intersectionRatio",
+    "intersectionRect",
+    "intersectsNode",
+    "interval",
+    "invalidIteratorState",
+    "invalidateFramebuffer",
+    "invalidateSubFramebuffer",
+    "inverse",
+    "invertSelf",
+    "invoker",
+    "invokerType",
+    "is",
+    "is2D",
+    "isActive",
+    "isAllowedFileSchemeAccess",
+    "isAllowedIncognitoAccess",
+    "isAlternate",
+    "isArray",
+    "isAutoSelected",
+    "isBingCurrentSearchDefault",
+    "isBuffer",
+    "isCandidateWindowVisible",
+    "isChar",
+    "isCollapsed",
+    "isComposing",
+    "isConcatSpreadable",
+    "isConditionalMediationAvailable",
+    "isConfigSupported",
+    "isConnected",
+    "isContentEditable",
+    "isContentHandlerRegistered",
+    "isContextLost",
+    "isDefaultNamespace",
+    "isDirectory",
+    "isDisabled",
+    "isDisjointFrom",
+    "isEnabled",
+    "isEqual",
+    "isEqualNode",
+    "isError",
+    "isExtended",
+    "isExtensible",
+    "isExternalCTAP2SecurityKeySupported",
+    "isFallbackAdapter",
+    "isFile",
+    "isFinite",
+    "isFirstPersonObserver",
+    "isFramebuffer",
+    "isFrozen",
+    "isGenerator",
+    "isHTML",
+    "isHistoryNavigation",
+    "isId",
+    "isIdentity",
+    "isInjected",
+    "isInputPending",
+    "isInteger",
+    "isInternal",
+    "isIntersecting",
+    "isLockFree",
+    "isMap",
+    "isMultiLine",
+    "isNaN",
+    "isOpen",
+    "isPointInFill",
+    "isPointInPath",
+    "isPointInRange",
+    "isPointInStroke",
+    "isPrefAlternate",
+    "isPresenting",
+    "isPrimary",
+    "isProgram",
+    "isPropertyImplicit",
+    "isProtocolHandlerRegistered",
+    "isPrototypeOf",
+    "isQuery",
+    "isRawJSON",
+    "isRenderbuffer",
+    "isSafeInteger",
+    "isSameEntry",
+    "isSameNode",
+    "isSampler",
+    "isScript",
+    "isScriptURL",
+    "isSealed",
+    "isSecureContext",
+    "isSessionSupported",
+    "isShader",
+    "isSubsetOf",
+    "isSupersetOf",
+    "isSupported",
+    "isSync",
+    "isTextEdit",
+    "isTexture",
+    "isTransformFeedback",
+    "isTrusted",
+    "isTypeSupported",
+    "isUserVerifyingPlatformAuthenticatorAvailable",
+    "isVertexArray",
+    "isView",
+    "isVisible",
+    "isWellFormed",
+    "isochronousTransferIn",
+    "isochronousTransferOut",
+    "isolation",
+    "italics",
+    "item",
+    "itemId",
+    "itemProp",
+    "itemRef",
+    "itemScope",
+    "itemType",
+    "itemValue",
+    "items",
+    "iterateNext",
+    "iterationComposite",
+    "iterator",
+    "javaEnabled",
+    "jitterBufferTarget",
+    "jobTitle",
+    "join",
+    "joinAdInterestGroup",
+    "jointName",
+    "json",
+    "justify-content",
+    "justify-items",
+    "justify-self",
+    "justifyContent",
+    "justifyItems",
+    "justifySelf",
+    "k1",
+    "k2",
+    "k3",
+    "k4",
+    "kHz",
+    "keepalive",
+    "kernelMatrix",
+    "kernelUnitLengthX",
+    "kernelUnitLengthY",
+    "kerning",
+    "key",
+    "keyCode",
+    "keyFor",
+    "keyIdentifier",
+    "keyLightEnabled",
+    "keyLocation",
+    "keyPath",
+    "keyStatuses",
+    "keySystem",
+    "keyText",
+    "keyUsage",
+    "keyboard",
+    "keys",
+    "keytype",
+    "kind",
+    "knee",
+    "knownSources",
+    "label",
+    "labels",
+    "lang",
+    "language",
+    "languages",
+    "largeArcFlag",
+    "last",
+    "lastChild",
+    "lastElementChild",
+    "lastError",
+    "lastEventId",
+    "lastIndex",
+    "lastIndexOf",
+    "lastInputTime",
+    "lastMatch",
+    "lastMessageSubject",
+    "lastMessageType",
+    "lastModified",
+    "lastModifiedDate",
+    "lastPage",
+    "lastParen",
+    "lastState",
+    "lastStyleSheetSet",
+    "latency",
+    "latitude",
+    "launchQueue",
+    "layerName",
+    "layerX",
+    "layerY",
+    "layout",
+    "layoutFlow",
+    "layoutGrid",
+    "layoutGridChar",
+    "layoutGridLine",
+    "layoutGridMode",
+    "layoutGridType",
+    "lbound",
+    "leaveAdInterestGroup",
+    "left",
+    "leftContext",
+    "leftDegrees",
+    "leftMargin",
+    "leftProjectionMatrix",
+    "leftViewMatrix",
+    "length",
+    "lengthAdjust",
+    "lengthComputable",
+    "letter-spacing",
+    "letterSpacing",
+    "level",
+    "lh",
+    "lighting-color",
+    "lightingColor",
+    "limitingConeAngle",
+    "limits",
+    "line",
+    "line-break",
+    "line-height",
+    "lineAlign",
+    "lineBreak",
+    "lineCap",
+    "lineDashOffset",
+    "lineGapOverride",
+    "lineHeight",
+    "lineJoin",
+    "lineNum",
+    "lineNumber",
+    "linePos",
+    "lineTo",
+    "lineWidth",
+    "linearAcceleration",
+    "linearRampToValueAtTime",
+    "linearVelocity",
+    "lineno",
+    "lines",
+    "link",
+    "linkColor",
+    "linkProgram",
+    "links",
+    "list",
+    "list-style",
+    "list-style-image",
+    "list-style-position",
+    "list-style-type",
+    "listStyle",
+    "listStyleImage",
+    "listStylePosition",
+    "listStyleType",
+    "listener",
+    "listeners",
+    "load",
+    "loadEventEnd",
+    "loadEventStart",
+    "loadOp",
+    "loadTime",
+    "loadTimes",
+    "loaded",
+    "loading",
+    "localDescription",
+    "localName",
+    "localService",
+    "localStorage",
+    "locale",
+    "localeCompare",
+    "location",
+    "locationbar",
+    "lock",
+    "locked",
+    "lockedFile",
+    "locks",
+    "lodMaxClamp",
+    "lodMinClamp",
+    "log",
+    "log10",
+    "log1p",
+    "log2",
+    "logicalXDPI",
+    "logicalYDPI",
+    "login",
+    "loglevel",
+    "longDesc",
+    "longitude",
+    "lookupNamespaceURI",
+    "lookupPrefix",
+    "loop",
+    "loopEnd",
+    "loopStart",
+    "looping",
+    "lost",
+    "low",
+    "lower",
+    "lowerBound",
+    "lowerOpen",
+    "lowsrc",
+    "lvb",
+    "lvh",
+    "lvi",
+    "lvmax",
+    "lvmin",
+    "lvw",
+    "m11",
+    "m12",
+    "m13",
+    "m14",
+    "m21",
+    "m22",
+    "m23",
+    "m24",
+    "m31",
+    "m32",
+    "m33",
+    "m34",
+    "m41",
+    "m42",
+    "m43",
+    "m44",
+    "magFilter",
+    "makeXRCompatible",
+    "managed",
+    "management",
+    "manifest",
+    "manufacturer",
+    "manufacturerName",
+    "map",
+    "mapAsync",
+    "mapState",
+    "mappedAtCreation",
+    "mapping",
+    "margin",
+    "margin-block",
+    "margin-block-end",
+    "margin-block-start",
+    "margin-bottom",
+    "margin-inline",
+    "margin-inline-end",
+    "margin-inline-start",
+    "margin-left",
+    "margin-right",
+    "margin-top",
+    "marginBlock",
+    "marginBlockEnd",
+    "marginBlockStart",
+    "marginBottom",
+    "marginHeight",
+    "marginInline",
+    "marginInlineEnd",
+    "marginInlineStart",
+    "marginLeft",
+    "marginRight",
+    "marginTop",
+    "marginWidth",
+    "mark",
+    "marker",
+    "marker-end",
+    "marker-mid",
+    "marker-offset",
+    "marker-start",
+    "markerEnd",
+    "markerHeight",
+    "markerMid",
+    "markerOffset",
+    "markerStart",
+    "markerUnits",
+    "markerWidth",
+    "marks",
+    "mask",
+    "mask-clip",
+    "mask-composite",
+    "mask-image",
+    "mask-mode",
+    "mask-origin",
+    "mask-position",
+    "mask-position-x",
+    "mask-position-y",
+    "mask-repeat",
+    "mask-size",
+    "mask-type",
+    "maskClip",
+    "maskComposite",
+    "maskContentUnits",
+    "maskImage",
+    "maskMode",
+    "maskOrigin",
+    "maskPosition",
+    "maskPositionX",
+    "maskPositionY",
+    "maskRepeat",
+    "maskSize",
+    "maskType",
+    "maskUnits",
+    "match",
+    "matchAll",
+    "matchMedia",
+    "matchMedium",
+    "matchPatterns",
+    "matches",
+    "math-depth",
+    "math-style",
+    "mathDepth",
+    "mathShift",
+    "mathStyle",
+    "matrix",
+    "matrixTransform",
+    "max",
+    "max-block-size",
+    "max-height",
+    "max-inline-size",
+    "max-width",
+    "maxActions",
+    "maxAlternatives",
+    "maxAnisotropy",
+    "maxBindGroups",
+    "maxBindGroupsPlusVertexBuffers",
+    "maxBindingsPerBindGroup",
+    "maxBlockSize",
+    "maxBufferSize",
+    "maxByteLength",
+    "maxChannelCount",
+    "maxChannels",
+    "maxColorAttachmentBytesPerSample",
+    "maxColorAttachments",
+    "maxComputeInvocationsPerWorkgroup",
+    "maxComputeWorkgroupSizeX",
+    "maxComputeWorkgroupSizeY",
+    "maxComputeWorkgroupSizeZ",
+    "maxComputeWorkgroupStorageSize",
+    "maxComputeWorkgroupsPerDimension",
+    "maxConnectionsPerServer",
+    "maxDatagramSize",
+    "maxDecibels",
+    "maxDistance",
+    "maxDrawCount",
+    "maxDynamicStorageBuffersPerPipelineLayout",
+    "maxDynamicUniformBuffersPerPipelineLayout",
+    "maxHeight",
+    "maxInlineSize",
+    "maxInterStageShaderComponents",
+    "maxInterStageShaderVariables",
+    "maxLayers",
+    "maxLength",
+    "maxMessageSize",
+    "maxPacketLifeTime",
+    "maxRetransmits",
+    "maxSampledTexturesPerShaderStage",
+    "maxSamplersPerShaderStage",
+    "maxStorageBufferBindingSize",
+    "maxStorageBuffersPerShaderStage",
+    "maxStorageTexturesPerShaderStage",
+    "maxTextureArrayLayers",
+    "maxTextureDimension1D",
+    "maxTextureDimension2D",
+    "maxTextureDimension3D",
+    "maxTouchPoints",
+    "maxUniformBufferBindingSize",
+    "maxUniformBuffersPerShaderStage",
+    "maxValue",
+    "maxVertexAttributes",
+    "maxVertexBufferArrayStride",
+    "maxVertexBuffers",
+    "maxWidth",
+    "maximumLatency",
+    "measure",
+    "measureInputUsage",
+    "measureText",
+    "media",
+    "mediaCapabilities",
+    "mediaDevices",
+    "mediaElement",
+    "mediaGroup",
+    "mediaKeys",
+    "mediaSession",
+    "mediaStream",
+    "mediaText",
+    "meetOrSlice",
+    "memory",
+    "menubar",
+    "menus",
+    "menusChild",
+    "menusInternal",
+    "mergeAttributes",
+    "message",
+    "messageClass",
+    "messageHandlers",
+    "messageType",
+    "messages",
+    "metaKey",
+    "metadata",
+    "method",
+    "methodDetails",
+    "methodName",
+    "microseconds",
+    "mid",
+    "milliseconds",
+    "mimeType",
+    "mimeTypes",
+    "min",
+    "min-block-size",
+    "min-height",
+    "min-inline-size",
+    "min-width",
+    "minBindingSize",
+    "minBlockSize",
+    "minDecibels",
+    "minFilter",
+    "minHeight",
+    "minInlineSize",
+    "minLength",
+    "minStorageBufferOffsetAlignment",
+    "minUniformBufferOffsetAlignment",
+    "minValue",
+    "minWidth",
+    "minimumLatency",
+    "minute",
+    "minutes",
+    "mipLevel",
+    "mipLevelCount",
+    "mipmapFilter",
+    "miterLimit",
+    "mix-blend-mode",
+    "mixBlendMode",
+    "mm",
+    "mobile",
+    "mode",
+    "model",
+    "modify",
+    "module",
+    "month",
+    "months",
+    "mount",
+    "move",
+    "moveBefore",
+    "moveBy",
+    "moveEnd",
+    "moveFirst",
+    "moveFocusDown",
+    "moveFocusLeft",
+    "moveFocusRight",
+    "moveFocusUp",
+    "moveInSuccession",
+    "moveNext",
+    "moveRow",
+    "moveStart",
+    "moveTo",
+    "moveToBookmark",
+    "moveToElementText",
+    "moveToPoint",
+    "movementX",
+    "movementY",
+    "mozAdd",
+    "mozAnimationStartTime",
+    "mozAnon",
+    "mozApps",
+    "mozAudioCaptured",
+    "mozAudioChannelType",
+    "mozAutoplayEnabled",
+    "mozCancelAnimationFrame",
+    "mozCancelFullScreen",
+    "mozCancelRequestAnimationFrame",
+    "mozCaptureStream",
+    "mozCaptureStreamUntilEnded",
+    "mozClearDataAt",
+    "mozContact",
+    "mozContacts",
+    "mozCreateFileHandle",
+    "mozCurrentTransform",
+    "mozCurrentTransformInverse",
+    "mozCursor",
+    "mozDash",
+    "mozDashOffset",
+    "mozDecodedFrames",
+    "mozExitPointerLock",
+    "mozFillRule",
+    "mozFragmentEnd",
+    "mozFrameDelay",
+    "mozFullScreen",
+    "mozFullScreenElement",
+    "mozFullScreenEnabled",
+    "mozGetAll",
+    "mozGetAllKeys",
+    "mozGetAsFile",
+    "mozGetDataAt",
+    "mozGetMetadata",
+    "mozGetUserMedia",
+    "mozHasAudio",
+    "mozHasItem",
+    "mozHidden",
+    "mozImageSmoothingEnabled",
+    "mozIndexedDB",
+    "mozInnerScreenX",
+    "mozInnerScreenY",
+    "mozInputSource",
+    "mozIsTextField",
+    "mozItem",
+    "mozItemCount",
+    "mozItems",
+    "mozLength",
+    "mozLockOrientation",
+    "mozMatchesSelector",
+    "mozMovementX",
+    "mozMovementY",
+    "mozOpaque",
+    "mozOrientation",
+    "mozPaintCount",
+    "mozPaintedFrames",
+    "mozParsedFrames",
+    "mozPay",
+    "mozPointerLockElement",
+    "mozPresentedFrames",
+    "mozPreservesPitch",
+    "mozPressure",
+    "mozPrintCallback",
+    "mozRTCIceCandidate",
+    "mozRTCPeerConnection",
+    "mozRTCSessionDescription",
+    "mozRemove",
+    "mozRequestAnimationFrame",
+    "mozRequestFullScreen",
+    "mozRequestPointerLock",
+    "mozSetDataAt",
+    "mozSetImageElement",
+    "mozSourceNode",
+    "mozSrcObject",
+    "mozSystem",
+    "mozTCPSocket",
+    "mozTextStyle",
+    "mozTypesAt",
+    "mozUnlockOrientation",
+    "mozUserCancelled",
+    "mozVisibilityState",
+    "ms",
+    "msAnimation",
+    "msAnimationDelay",
+    "msAnimationDirection",
+    "msAnimationDuration",
+    "msAnimationFillMode",
+    "msAnimationIterationCount",
+    "msAnimationName",
+    "msAnimationPlayState",
+    "msAnimationStartTime",
+    "msAnimationTimingFunction",
+    "msBackfaceVisibility",
+    "msBlockProgression",
+    "msCSSOMElementFloatMetrics",
+    "msCaching",
+    "msCachingEnabled",
+    "msCancelRequestAnimationFrame",
+    "msCapsLockWarningOff",
+    "msClearImmediate",
+    "msClose",
+    "msContentZoomChaining",
+    "msContentZoomFactor",
+    "msContentZoomLimit",
+    "msContentZoomLimitMax",
+    "msContentZoomLimitMin",
+    "msContentZoomSnap",
+    "msContentZoomSnapPoints",
+    "msContentZoomSnapType",
+    "msContentZooming",
+    "msConvertURL",
+    "msCrypto",
+    "msDoNotTrack",
+    "msElementsFromPoint",
+    "msElementsFromRect",
+    "msExitFullscreen",
+    "msExtendedCode",
+    "msFillRule",
+    "msFirstPaint",
+    "msFlex",
+    "msFlexAlign",
+    "msFlexDirection",
+    "msFlexFlow",
+    "msFlexItemAlign",
+    "msFlexLinePack",
+    "msFlexNegative",
+    "msFlexOrder",
+    "msFlexPack",
+    "msFlexPositive",
+    "msFlexPreferredSize",
+    "msFlexWrap",
+    "msFlowFrom",
+    "msFlowInto",
+    "msFontFeatureSettings",
+    "msFullscreenElement",
+    "msFullscreenEnabled",
+    "msGetInputContext",
+    "msGetRegionContent",
+    "msGetUntransformedBounds",
+    "msGraphicsTrustStatus",
+    "msGridColumn",
+    "msGridColumnAlign",
+    "msGridColumnSpan",
+    "msGridColumns",
+    "msGridRow",
+    "msGridRowAlign",
+    "msGridRowSpan",
+    "msGridRows",
+    "msHidden",
+    "msHighContrastAdjust",
+    "msHyphenateLimitChars",
+    "msHyphenateLimitLines",
+    "msHyphenateLimitZone",
+    "msHyphens",
+    "msImageSmoothingEnabled",
+    "msImeAlign",
+    "msIndexedDB",
+    "msInterpolationMode",
+    "msIsStaticHTML",
+    "msKeySystem",
+    "msKeys",
+    "msLaunchUri",
+    "msLockOrientation",
+    "msManipulationViewsEnabled",
+    "msMatchMedia",
+    "msMatchesSelector",
+    "msMaxTouchPoints",
+    "msOrientation",
+    "msOverflowStyle",
+    "msPerspective",
+    "msPerspectiveOrigin",
+    "msPlayToDisabled",
+    "msPlayToPreferredSourceUri",
+    "msPlayToPrimary",
+    "msPointerEnabled",
+    "msRegionOverflow",
+    "msReleasePointerCapture",
+    "msRequestAnimationFrame",
+    "msRequestFullscreen",
+    "msSaveBlob",
+    "msSaveOrOpenBlob",
+    "msScrollChaining",
+    "msScrollLimit",
+    "msScrollLimitXMax",
+    "msScrollLimitXMin",
+    "msScrollLimitYMax",
+    "msScrollLimitYMin",
+    "msScrollRails",
+    "msScrollSnapPointsX",
+    "msScrollSnapPointsY",
+    "msScrollSnapType",
+    "msScrollSnapX",
+    "msScrollSnapY",
+    "msScrollTranslation",
+    "msSetImmediate",
+    "msSetMediaKeys",
+    "msSetPointerCapture",
+    "msTextCombineHorizontal",
+    "msTextSizeAdjust",
+    "msToBlob",
+    "msTouchAction",
+    "msTouchSelect",
+    "msTraceAsyncCallbackCompleted",
+    "msTraceAsyncCallbackStarting",
+    "msTraceAsyncOperationCompleted",
+    "msTraceAsyncOperationStarting",
+    "msTransform",
+    "msTransformOrigin",
+    "msTransformStyle",
+    "msTransition",
+    "msTransitionDelay",
+    "msTransitionDuration",
+    "msTransitionProperty",
+    "msTransitionTimingFunction",
+    "msUnlockOrientation",
+    "msUpdateAsyncCallbackRelation",
+    "msUserSelect",
+    "msVisibilityState",
+    "msWrapFlow",
+    "msWrapMargin",
+    "msWrapThrough",
+    "msWriteProfilerMark",
+    "msZoom",
+    "msZoomTo",
+    "mt",
+    "mul",
+    "multiEntry",
+    "multiSelectionObj",
+    "multiline",
+    "multiple",
+    "multiply",
+    "multiplySelf",
+    "multisample",
+    "multisampled",
+    "mutableFile",
+    "muted",
+    "n",
+    "nacl_arch",
+    "name",
+    "nameList",
+    "nameProp",
+    "namedItem",
+    "namedRecordset",
+    "names",
+    "namespaceURI",
+    "namespaces",
+    "nanoseconds",
+    "nativeApplication",
+    "nativeMap",
+    "nativeObjectCreate",
+    "nativeSet",
+    "nativeWeakMap",
+    "naturalHeight",
+    "naturalWidth",
+    "navigate",
+    "navigation",
+    "navigationMode",
+    "navigationPreload",
+    "navigationStart",
+    "navigationType",
+    "navigator",
+    "near",
+    "nearestViewportElement",
+    "negative",
+    "negotiated",
+    "netscape",
+    "networkState",
+    "networkStatus",
+    "newScale",
+    "newState",
+    "newTranslate",
+    "newURL",
+    "newValue",
+    "newValueSpecifiedUnits",
+    "newVersion",
+    "newhome",
+    "next",
+    "nextElementSibling",
+    "nextHopProtocol",
+    "nextNode",
+    "nextPage",
+    "nextSibling",
+    "nickname",
+    "noHref",
+    "noModule",
+    "noResize",
+    "noShade",
+    "noValidate",
+    "noWrap",
+    "node",
+    "nodeName",
+    "nodeType",
+    "nodeValue",
+    "nonce",
+    "normDepthBufferFromNormView",
+    "normalize",
+    "normalizedPathSegList",
+    "normandyAddonStudy",
+    "notRestoredReasons",
+    "notationName",
+    "notations",
+    "note",
+    "noteGrainOn",
+    "noteOff",
+    "noteOn",
+    "notifications",
+    "notify",
+    "now",
+    "npnNegotiatedProtocol",
+    "numOctaves",
+    "number",
+    "numberOfChannels",
+    "numberOfFrames",
+    "numberOfInputs",
+    "numberOfItems",
+    "numberOfOutputs",
+    "numberValue",
+    "numberingSystem",
+    "numeric",
+    "oMatchesSelector",
+    "object",
+    "object-fit",
+    "object-position",
+    "objectFit",
+    "objectPosition",
+    "objectStore",
+    "objectStoreNames",
+    "objectType",
+    "observe",
+    "observedAttributes",
+    "occlusionQuerySet",
+    "of",
+    "off",
+    "offscreenBuffering",
+    "offset",
+    "offset-anchor",
+    "offset-distance",
+    "offset-path",
+    "offset-position",
+    "offset-rotate",
+    "offsetAnchor",
+    "offsetDistance",
+    "offsetHeight",
+    "offsetLeft",
+    "offsetNode",
+    "offsetParent",
+    "offsetPath",
+    "offsetPosition",
+    "offsetRotate",
+    "offsetTop",
+    "offsetWidth",
+    "offsetX",
+    "offsetY",
+    "ok",
+    "oldState",
+    "oldURL",
+    "oldValue",
+    "oldVersion",
+    "olderShadowRoot",
+    "omnibox",
+    "on",
+    "onActivated",
+    "onAdded",
+    "onAttached",
+    "onBoundsChanged",
+    "onBrowserUpdateAvailable",
+    "onClicked",
+    "onCommitFiberRoot",
+    "onCommitFiberUnmount",
+    "onConnect",
+    "onConnectExternal",
+    "onConnectNative",
+    "onCreated",
+    "onDetached",
+    "onDisabled",
+    "onEnabled",
+    "onFocusChanged",
+    "onHighlighted",
+    "onInstalled",
+    "onLine",
+    "onMessage",
+    "onMessageExternal",
+    "onMoved",
+    "onPerformanceWarning",
+    "onPostCommitFiberRoot",
+    "onRemoved",
+    "onReplaced",
+    "onRestartRequired",
+    "onStartup",
+    "onSubmittedWorkDone",
+    "onSuspend",
+    "onSuspendCanceled",
+    "onUninstalled",
+    "onUpdateAvailable",
+    "onUpdated",
+    "onUserScriptConnect",
+    "onUserScriptMessage",
+    "onUserSettingsChanged",
+    "onZoomChange",
+    "onabort",
+    "onabsolutedeviceorientation",
+    "onactivate",
+    "onactive",
+    "onaddsourcebuffer",
+    "onaddstream",
+    "onaddtrack",
+    "onafterprint",
+    "onafterscriptexecute",
+    "onafterupdate",
+    "onanimationcancel",
+    "onanimationend",
+    "onanimationiteration",
+    "onanimationstart",
+    "onappinstalled",
+    "onaudioend",
+    "onaudioprocess",
+    "onaudiostart",
+    "onautocomplete",
+    "onautocompleteerror",
+    "onauxclick",
+    "onbeforeactivate",
+    "onbeforecopy",
+    "onbeforecut",
+    "onbeforedeactivate",
+    "onbeforeeditfocus",
+    "onbeforeinput",
+    "onbeforeinstallprompt",
+    "onbeforematch",
+    "onbeforepaste",
+    "onbeforeprint",
+    "onbeforescriptexecute",
+    "onbeforetoggle",
+    "onbeforeunload",
+    "onbeforeupdate",
+    "onbeforexrselect",
+    "onbegin",
+    "onblocked",
+    "onblur",
+    "onbounce",
+    "onboundary",
+    "onbufferedamountlow",
+    "oncached",
+    "oncancel",
+    "oncandidatewindowhide",
+    "oncandidatewindowshow",
+    "oncandidatewindowupdate",
+    "oncanplay",
+    "oncanplaythrough",
+    "oncapturehandlechange",
+    "once",
+    "oncellchange",
+    "onchange",
+    "oncharacterboundsupdate",
+    "oncharacteristicvaluechanged",
+    "onchargingchange",
+    "onchargingtimechange",
+    "onchecking",
+    "onclick",
+    "onclose",
+    "onclosing",
+    "oncommand",
+    "oncompassneedscalibration",
+    "oncomplete",
+    "oncompositionend",
+    "oncompositionstart",
+    "onconnect",
+    "onconnecting",
+    "onconnectionavailable",
+    "onconnectionstatechange",
+    "oncontentvisibilityautostatechange",
+    "oncontextlost",
+    "oncontextmenu",
+    "oncontextrestored",
+    "oncontrollerchange",
+    "oncontrolselect",
+    "oncopy",
+    "oncuechange",
+    "oncurrententrychange",
+    "oncurrentscreenchange",
+    "oncut",
+    "ondataavailable",
+    "ondatachannel",
+    "ondatasetchanged",
+    "ondatasetcomplete",
+    "ondblclick",
+    "ondeactivate",
+    "ondequeue",
+    "ondevicechange",
+    "ondevicelight",
+    "ondevicemotion",
+    "ondeviceorientation",
+    "ondeviceorientationabsolute",
+    "ondeviceproximity",
+    "ondischargingtimechange",
+    "ondisconnect",
+    "ondisplay",
+    "ondispose",
+    "ondownloading",
+    "ondownloadprogress",
+    "ondrag",
+    "ondragend",
+    "ondragenter",
+    "ondragexit",
+    "ondragleave",
+    "ondragover",
+    "ondragstart",
+    "ondrop",
+    "ondurationchange",
+    "onemptied",
+    "onencrypted",
+    "onend",
+    "onended",
+    "onenter",
+    "onenterpictureinpicture",
+    "onerror",
+    "onerrorupdate",
+    "onexit",
+    "onfencedtreeclick",
+    "onfilterchange",
+    "onfinish",
+    "onfocus",
+    "onfocusin",
+    "onfocusout",
+    "onformdata",
+    "onfreeze",
+    "onfullscreenchange",
+    "onfullscreenerror",
+    "ongamepadconnected",
+    "ongamepaddisconnected",
+    "ongatheringstatechange",
+    "ongattserverdisconnected",
+    "ongeometrychange",
+    "ongesturechange",
+    "ongestureend",
+    "ongesturestart",
+    "ongotpointercapture",
+    "onhashchange",
+    "onhelp",
+    "onicecandidate",
+    "onicecandidateerror",
+    "oniceconnectionstatechange",
+    "onicegatheringstatechange",
+    "oninactive",
+    "oninput",
+    "oninputreport",
+    "oninputsourceschange",
+    "oninvalid",
+    "onkeydown",
+    "onkeypress",
+    "onkeystatuseschange",
+    "onkeyup",
+    "onlanguagechange",
+    "onlayoutcomplete",
+    "onleavepictureinpicture",
+    "onlevelchange",
+    "onload",
+    "onloadT",
+    "onloadeddata",
+    "onloadedmetadata",
+    "onloadend",
+    "onloading",
+    "onloadingdone",
+    "onloadingerror",
+    "onloadstart",
+    "onlosecapture",
+    "onlostpointercapture",
+    "only",
+    "onmanagedconfigurationchange",
+    "onmark",
+    "onmessage",
+    "onmessageerror",
+    "onmidimessage",
+    "onmousedown",
+    "onmouseenter",
+    "onmouseleave",
+    "onmousemove",
+    "onmouseout",
+    "onmouseover",
+    "onmouseup",
+    "onmousewheel",
+    "onmove",
+    "onmoveend",
+    "onmovestart",
+    "onmozfullscreenchange",
+    "onmozfullscreenerror",
+    "onmozorientationchange",
+    "onmozpointerlockchange",
+    "onmozpointerlockerror",
+    "onmscontentzoom",
+    "onmsfullscreenchange",
+    "onmsfullscreenerror",
+    "onmsgesturechange",
+    "onmsgesturedoubletap",
+    "onmsgestureend",
+    "onmsgesturehold",
+    "onmsgesturestart",
+    "onmsgesturetap",
+    "onmsgotpointercapture",
+    "onmsinertiastart",
+    "onmslostpointercapture",
+    "onmsmanipulationstatechanged",
+    "onmsneedkey",
+    "onmsorientationchange",
+    "onmspointercancel",
+    "onmspointerdown",
+    "onmspointerenter",
+    "onmspointerhover",
+    "onmspointerleave",
+    "onmspointermove",
+    "onmspointerout",
+    "onmspointerover",
+    "onmspointerup",
+    "onmssitemodejumplistitemremoved",
+    "onmsthumbnailclick",
+    "onmute",
+    "onnavigate",
+    "onnavigateerror",
+    "onnavigatesuccess",
+    "onnegotiationneeded",
+    "onnomatch",
+    "onnoupdate",
+    "onobsolete",
+    "onoffline",
+    "ononline",
+    "onopen",
+    "onorientationchange",
+    "onpagechange",
+    "onpagehide",
+    "onpagereveal",
+    "onpageshow",
+    "onpageswap",
+    "onpaste",
+    "onpause",
+    "onpayerdetailchange",
+    "onpaymentmethodchange",
+    "onplay",
+    "onplaying",
+    "onpluginstreamstart",
+    "onpointercancel",
+    "onpointerdown",
+    "onpointerenter",
+    "onpointerleave",
+    "onpointerlockchange",
+    "onpointerlockerror",
+    "onpointermove",
+    "onpointerout",
+    "onpointerover",
+    "onpointerrawupdate",
+    "onpointerup",
+    "onpopstate",
+    "onprerenderingchange",
+    "onprioritychange",
+    "onprocessorerror",
+    "onprogress",
+    "onpropertychange",
+    "onratechange",
+    "onreading",
+    "onreadystatechange",
+    "onreflectionchange",
+    "onrejectionhandled",
+    "onrelease",
+    "onremove",
+    "onremovesourcebuffer",
+    "onremovestream",
+    "onremovetrack",
+    "onrepeat",
+    "onreset",
+    "onresize",
+    "onresizeend",
+    "onresizestart",
+    "onresourcetimingbufferfull",
+    "onresult",
+    "onresume",
+    "onrowenter",
+    "onrowexit",
+    "onrowsdelete",
+    "onrowsinserted",
+    "onscreenschange",
+    "onscroll",
+    "onscrollend",
+    "onscrollsnapchange",
+    "onscrollsnapchanging",
+    "onsearch",
+    "onsecuritypolicyviolation",
+    "onseeked",
+    "onseeking",
+    "onselect",
+    "onselectedcandidatepairchange",
+    "onselectend",
+    "onselectionchange",
+    "onselectstart",
+    "onshippingaddresschange",
+    "onshippingoptionchange",
+    "onshow",
+    "onsignalingstatechange",
+    "onsinkchange",
+    "onslotchange",
+    "onsoundend",
+    "onsoundstart",
+    "onsourceclose",
+    "onsourceclosed",
+    "onsourceended",
+    "onsourceopen",
+    "onspeechend",
+    "onspeechstart",
+    "onsqueeze",
+    "onsqueezeend",
+    "onsqueezestart",
+    "onstalled",
+    "onstart",
+    "onstatechange",
+    "onstop",
+    "onstorage",
+    "onstoragecommit",
+    "onsubmit",
+    "onsuccess",
+    "onsuspend",
+    "onterminate",
+    "ontextformatupdate",
+    "ontextinput",
+    "ontextupdate",
+    "ontimeout",
+    "ontimeupdate",
+    "ontoggle",
+    "ontonechange",
+    "ontouchcancel",
+    "ontouchend",
+    "ontouchmove",
+    "ontouchstart",
+    "ontrack",
+    "ontransitioncancel",
+    "ontransitionend",
+    "ontransitionrun",
+    "ontransitionstart",
+    "onuncapturederror",
+    "onunhandledrejection",
+    "onunload",
+    "onunmute",
+    "onupdate",
+    "onupdateend",
+    "onupdatefound",
+    "onupdateready",
+    "onupdatestart",
+    "onupgradeneeded",
+    "onuserproximity",
+    "onversionchange",
+    "onvisibilitychange",
+    "onvoiceschanged",
+    "onvolumechange",
+    "onvrdisplayactivate",
+    "onvrdisplayconnect",
+    "onvrdisplaydeactivate",
+    "onvrdisplaydisconnect",
+    "onvrdisplaypresentchange",
+    "onwaiting",
+    "onwaitingforkey",
+    "onwarning",
+    "onwebkitanimationend",
+    "onwebkitanimationiteration",
+    "onwebkitanimationstart",
+    "onwebkitcurrentplaybacktargetiswirelesschanged",
+    "onwebkitfullscreenchange",
+    "onwebkitfullscreenerror",
+    "onwebkitkeyadded",
+    "onwebkitkeyerror",
+    "onwebkitkeymessage",
+    "onwebkitneedkey",
+    "onwebkitorientationchange",
+    "onwebkitplaybacktargetavailabilitychanged",
+    "onwebkitpointerlockchange",
+    "onwebkitpointerlockerror",
+    "onwebkitresourcetimingbufferfull",
+    "onwebkittransitionend",
+    "onwheel",
+    "onzoom",
+    "onzoomlevelchange",
+    "opacity",
+    "open",
+    "openCursor",
+    "openDatabase",
+    "openKeyCursor",
+    "openOptionsPage",
+    "openOrClosedShadowRoot",
+    "openPopup",
+    "opened",
+    "opener",
+    "opera",
+    "operation",
+    "operationType",
+    "operator",
+    "opr",
+    "optimum",
+    "options",
+    "or",
+    "order",
+    "orderX",
+    "orderY",
+    "ordered",
+    "org",
+    "organization",
+    "orient",
+    "orientAngle",
+    "orientType",
+    "orientation",
+    "orientationX",
+    "orientationY",
+    "orientationZ",
+    "origin",
+    "originAgentCluster",
+    "originalPolicy",
+    "originalTarget",
+    "ornaments",
+    "orphans",
+    "os",
+    "oscpu",
+    "outerHTML",
+    "outerHeight",
+    "outerText",
+    "outerWidth",
+    "outgoingHighWaterMark",
+    "outgoingMaxAge",
+    "outline",
+    "outline-color",
+    "outline-offset",
+    "outline-style",
+    "outline-width",
+    "outlineColor",
+    "outlineOffset",
+    "outlineStyle",
+    "outlineWidth",
+    "outputBuffer",
+    "outputChannelCount",
+    "outputLanguage",
+    "outputLatency",
+    "outputs",
+    "overallProgress",
+    "overflow",
+    "overflow-anchor",
+    "overflow-block",
+    "overflow-clip-margin",
+    "overflow-inline",
+    "overflow-wrap",
+    "overflow-x",
+    "overflow-y",
+    "overflowAnchor",
+    "overflowBlock",
+    "overflowClipMargin",
+    "overflowInline",
+    "overflowWrap",
+    "overflowX",
+    "overflowY",
+    "overlaysContent",
+    "overrideColors",
+    "overrideMimeType",
+    "oversample",
+    "overscroll-behavior",
+    "overscroll-behavior-block",
+    "overscroll-behavior-inline",
+    "overscroll-behavior-x",
+    "overscroll-behavior-y",
+    "overscrollBehavior",
+    "overscrollBehaviorBlock",
+    "overscrollBehaviorInline",
+    "overscrollBehaviorX",
+    "overscrollBehaviorY",
+    "ownKeys",
+    "ownerDocument",
+    "ownerElement",
+    "ownerNode",
+    "ownerRule",
+    "ownerSVGElement",
+    "owningElement",
+    "p1",
+    "p2",
+    "p3",
+    "p4",
+    "packetSize",
+    "packets",
+    "pad",
+    "padEnd",
+    "padStart",
+    "padding",
+    "padding-block",
+    "padding-block-end",
+    "padding-block-start",
+    "padding-bottom",
+    "padding-inline",
+    "padding-inline-end",
+    "padding-inline-start",
+    "padding-left",
+    "padding-right",
+    "padding-top",
+    "paddingBlock",
+    "paddingBlockEnd",
+    "paddingBlockStart",
+    "paddingBottom",
+    "paddingInline",
+    "paddingInlineEnd",
+    "paddingInlineStart",
+    "paddingLeft",
+    "paddingRight",
+    "paddingTop",
+    "page",
+    "page-break-after",
+    "page-break-before",
+    "page-break-inside",
+    "page-orientation",
+    "pageAction",
+    "pageBreakAfter",
+    "pageBreakBefore",
+    "pageBreakInside",
+    "pageCount",
+    "pageLeft",
+    "pageOrientation",
+    "pageT",
+    "pageTop",
+    "pageX",
+    "pageXOffset",
+    "pageY",
+    "pageYOffset",
+    "pages",
+    "paint-order",
+    "paintOrder",
+    "paintRequests",
+    "paintTime",
+    "paintType",
+    "paintWorklet",
+    "palette",
+    "pan",
+    "panningModel",
+    "parameterData",
+    "parameters",
+    "parent",
+    "parentElement",
+    "parentNode",
+    "parentRule",
+    "parentStyleSheet",
+    "parentTextEdit",
+    "parentWindow",
+    "parse",
+    "parseAll",
+    "parseCreationOptionsFromJSON",
+    "parseFloat",
+    "parseFromString",
+    "parseHTMLUnsafe",
+    "parseInt",
+    "parseRequestOptionsFromJSON",
+    "part",
+    "participants",
+    "passOp",
+    "passive",
+    "password",
+    "pasteHTML",
+    "path",
+    "pathLength",
+    "pathSegList",
+    "pathSegType",
+    "pathSegTypeAsLetter",
+    "pathname",
+    "pattern",
+    "patternContentUnits",
+    "patternMismatch",
+    "patternTransform",
+    "patternUnits",
+    "pause",
+    "pauseAnimations",
+    "pauseDepthSensing",
+    "pauseDuration",
+    "pauseOnExit",
+    "pauseProfilers",
+    "pauseTransformFeedback",
+    "paused",
+    "payerEmail",
+    "payerName",
+    "payerPhone",
+    "paymentManager",
+    "pc",
+    "pdfViewerEnabled",
+    "peerIdentity",
+    "pending",
+    "pendingLocalDescription",
+    "pendingRemoteDescription",
+    "percent",
+    "performance",
+    "periodicSync",
+    "permission",
+    "permissionState",
+    "permissions",
+    "persist",
+    "persisted",
+    "persistentDeviceId",
+    "personalbar",
+    "perspective",
+    "perspective-origin",
+    "perspectiveOrigin",
+    "phone",
+    "phoneticFamilyName",
+    "phoneticGivenName",
+    "photo",
+    "phrase",
+    "phrases",
+    "pictureInPictureChild",
+    "pictureInPictureElement",
+    "pictureInPictureEnabled",
+    "pictureInPictureWindow",
+    "ping",
+    "pipeThrough",
+    "pipeTo",
+    "pitch",
+    "pixelBottom",
+    "pixelDepth",
+    "pixelFormat",
+    "pixelHeight",
+    "pixelLeft",
+    "pixelRight",
+    "pixelStorei",
+    "pixelTop",
+    "pixelUnitToMillimeterX",
+    "pixelUnitToMillimeterY",
+    "pixelWidth",
+    "pkcs11",
+    "place-content",
+    "place-items",
+    "place-self",
+    "placeContent",
+    "placeItems",
+    "placeSelf",
+    "placeholder",
+    "platform",
+    "platformVersion",
+    "platforms",
+    "play",
+    "playEffect",
+    "playState",
+    "playbackRate",
+    "playbackState",
+    "playbackTime",
+    "played",
+    "playoutDelayHint",
+    "playsInline",
+    "plugins",
+    "pluginspage",
+    "pname",
+    "pointer-events",
+    "pointerBeforeReferenceNode",
+    "pointerEnabled",
+    "pointerEvents",
+    "pointerId",
+    "pointerLockElement",
+    "pointerType",
+    "points",
+    "pointsAtX",
+    "pointsAtY",
+    "pointsAtZ",
+    "polygonOffset",
+    "pop",
+    "popDebugGroup",
+    "popErrorScope",
+    "popover",
+    "popoverTargetAction",
+    "popoverTargetElement",
+    "populateMatrix",
+    "popupWindowFeatures",
+    "popupWindowName",
+    "popupWindowURI",
+    "port",
+    "port1",
+    "port2",
+    "ports",
+    "posBottom",
+    "posHeight",
+    "posLeft",
+    "posRight",
+    "posTop",
+    "posWidth",
+    "pose",
+    "position",
+    "position-anchor",
+    "position-area",
+    "positionAlign",
+    "positionAnchor",
+    "positionArea",
+    "positionTry",
+    "positionTryFallbacks",
+    "positionVisibility",
+    "positionX",
+    "positionY",
+    "positionZ",
+    "postError",
+    "postMessage",
+    "postTask",
+    "postalCode",
+    "poster",
+    "postscriptName",
+    "pow",
+    "powerEfficient",
+    "powerOff",
+    "powerPreference",
+    "preMultiplySelf",
+    "precision",
+    "preferredReflectionFormat",
+    "preferredStyleSheetSet",
+    "preferredStylesheetSet",
+    "prefix",
+    "preload",
+    "premultipliedAlpha",
+    "prepend",
+    "prerendering",
+    "presentation",
+    "presentationArea",
+    "presentationStyle",
+    "presentationTime",
+    "preserveAlpha",
+    "preserveAspectRatio",
+    "preserveAspectRatioString",
+    "preservesPitch",
+    "pressed",
+    "pressure",
+    "prevValue",
+    "preventDefault",
+    "preventExtensions",
+    "preventSilentAccess",
+    "previousElementSibling",
+    "previousNode",
+    "previousPage",
+    "previousPriority",
+    "previousRect",
+    "previousScale",
+    "previousSibling",
+    "previousTranslate",
+    "primaries",
+    "primaryKey",
+    "primaryLightDirection",
+    "primaryLightIntensity",
+    "primitive",
+    "primitiveType",
+    "primitiveUnits",
+    "principals",
+    "print",
+    "print-color-adjust",
+    "printColorAdjust",
+    "printPreview",
+    "priority",
+    "privacy",
+    "privateKey",
+    "privateToken",
+    "probablySupportsContext",
+    "probeSpace",
+    "process",
+    "processIceMessage",
+    "processLocally",
+    "processingEnd",
+    "processingStart",
+    "processorOptions",
+    "product",
+    "productId",
+    "productName",
+    "productSub",
+    "profile",
+    "profileEnd",
+    "profiles",
+    "projectionMatrix",
+    "promise",
+    "promising",
+    "prompt",
+    "properties",
+    "propertyIsEnumerable",
+    "propertyName",
+    "protectedAudience",
+    "protocol",
+    "protocolLong",
+    "prototype",
+    "provider",
+    "proxy",
+    "pseudoClass",
+    "pseudoElement",
+    "pt",
+    "publicId",
+    "publicKey",
+    "published",
+    "pulse",
+    "push",
+    "pushDebugGroup",
+    "pushErrorScope",
+    "pushManager",
+    "pushNotification",
+    "pushState",
+    "put",
+    "putImageData",
+    "px",
+    "quadraticCurveTo",
+    "qualifier",
+    "quaternion",
+    "query",
+    "queryCommandEnabled",
+    "queryCommandIndeterm",
+    "queryCommandState",
+    "queryCommandSupported",
+    "queryCommandText",
+    "queryCommandValue",
+    "queryFeatureSupport",
+    "queryLocalFonts",
+    "queryPermission",
+    "querySelector",
+    "querySelectorAll",
+    "querySet",
+    "queue",
+    "queueMicrotask",
+    "quota",
+    "quote",
+    "quotes",
+    "r",
+    "r1",
+    "r2",
+    "race",
+    "rad",
+    "radiogroup",
+    "radius",
+    "radiusX",
+    "radiusY",
+    "random",
+    "randomUUID",
+    "range",
+    "rangeCount",
+    "rangeEnd",
+    "rangeMax",
+    "rangeMin",
+    "rangeOffset",
+    "rangeOverflow",
+    "rangeParent",
+    "rangeStart",
+    "rangeUnderflow",
+    "rate",
+    "ratio",
+    "raw",
+    "rawId",
+    "rawJSON",
+    "rawValueToMeters",
+    "rcap",
+    "rch",
+    "read",
+    "readAsArrayBuffer",
+    "readAsBinaryString",
+    "readAsBlob",
+    "readAsDataURL",
+    "readAsText",
+    "readBuffer",
+    "readEntries",
+    "readOnly",
+    "readPixels",
+    "readReportRequested",
+    "readText",
+    "readValue",
+    "readable",
+    "ready",
+    "readyState",
+    "reason",
+    "reasons",
+    "reboot",
+    "receiveFeatureReport",
+    "receivedAlert",
+    "receiver",
+    "receivers",
+    "recipient",
+    "recommendedViewportScale",
+    "reconnect",
+    "recordNumber",
+    "recordsAvailable",
+    "recordset",
+    "rect",
+    "red",
+    "redEyeReduction",
+    "redirect",
+    "redirectCount",
+    "redirectEnd",
+    "redirectStart",
+    "redirected",
+    "reduce",
+    "reduceRight",
+    "reduction",
+    "refDistance",
+    "refX",
+    "refY",
+    "referenceNode",
+    "referenceSpace",
+    "referrer",
+    "referrerPolicy",
+    "refresh",
+    "region",
+    "regionAnchorX",
+    "regionAnchorY",
+    "regionId",
+    "regions",
+    "register",
+    "registerContentHandler",
+    "registerElement",
+    "registerInternalModuleStart",
+    "registerInternalModuleStop",
+    "registerProperty",
+    "registerProtocolHandler",
+    "reject",
+    "rel",
+    "relList",
+    "relatedAddress",
+    "relatedNode",
+    "relatedPort",
+    "relatedTarget",
+    "relayProtocol",
+    "release",
+    "releaseCapture",
+    "releaseEvents",
+    "releaseInterface",
+    "releaseLock",
+    "releasePointerCapture",
+    "releaseShaderCompiler",
+    "released",
+    "reliability",
+    "reliable",
+    "reliableWrite",
+    "reload",
+    "rem",
+    "remainingSpace",
+    "remote",
+    "remoteDescription",
+    "remove",
+    "removeAllRanges",
+    "removeAttribute",
+    "removeAttributeNS",
+    "removeAttributeNode",
+    "removeBehavior",
+    "removeChild",
+    "removeCue",
+    "removeEntry",
+    "removeEventListener",
+    "removeFilter",
+    "removeImport",
+    "removeItem",
+    "removeListener",
+    "removeNamedItem",
+    "removeNamedItemNS",
+    "removeNode",
+    "removeParameter",
+    "removeProperty",
+    "removeRange",
+    "removeRegion",
+    "removeRule",
+    "removeSiteSpecificTrackingException",
+    "removeSourceBuffer",
+    "removeStream",
+    "removeTrack",
+    "removeVariable",
+    "removeWakeLockListener",
+    "removeWebWideTrackingException",
+    "removed",
+    "removedNodes",
+    "renderBlockingStatus",
+    "renderHeight",
+    "renderStart",
+    "renderState",
+    "renderTime",
+    "renderWidth",
+    "renderbufferStorage",
+    "renderbufferStorageMultisample",
+    "renderedBuffer",
+    "rendererInterfaces",
+    "renderers",
+    "renderingMode",
+    "renotify",
+    "repeat",
+    "repetitionCount",
+    "replace",
+    "replaceAdjacentText",
+    "replaceAll",
+    "replaceChild",
+    "replaceChildren",
+    "replaceData",
+    "replaceId",
+    "replaceItem",
+    "replaceNode",
+    "replaceState",
+    "replaceSync",
+    "replaceTrack",
+    "replaceWholeText",
+    "replaceWith",
+    "reportError",
+    "reportEvent",
+    "reportId",
+    "reportOnly",
+    "reportValidity",
+    "request",
+    "requestAdapter",
+    "requestAdapterInfo",
+    "requestAnimationFrame",
+    "requestAutocomplete",
+    "requestClose",
+    "requestData",
+    "requestDevice",
+    "requestFrame",
+    "requestFullscreen",
+    "requestHitTestSource",
+    "requestHitTestSourceForTransientInput",
+    "requestId",
+    "requestIdleCallback",
+    "requestLightProbe",
+    "requestMIDIAccess",
+    "requestMediaKeySystemAccess",
+    "requestPermission",
+    "requestPictureInPicture",
+    "requestPointerLock",
+    "requestPort",
+    "requestPresent",
+    "requestPresenter",
+    "requestReferenceSpace",
+    "requestSession",
+    "requestStart",
+    "requestStorageAccess",
+    "requestStorageAccessFor",
+    "requestSubmit",
+    "requestTime",
+    "requestUpdateCheck",
+    "requestVideoFrameCallback",
+    "requestViewportScale",
+    "requestWindow",
+    "requested",
+    "requestingWindow",
+    "requireInteraction",
+    "required",
+    "requiredExtensions",
+    "requiredFeatures",
+    "requiredLimits",
+    "reset",
+    "resetLatency",
+    "resetPose",
+    "resetTransform",
+    "resetZoomLevel",
+    "resizable",
+    "resize",
+    "resizeBy",
+    "resizeTo",
+    "resolve",
+    "resolveQuerySet",
+    "resolveTarget",
+    "resource",
+    "respond",
+    "respondWithNewView",
+    "response",
+    "responseBody",
+    "responseEnd",
+    "responseReady",
+    "responseStart",
+    "responseStatus",
+    "responseText",
+    "responseType",
+    "responseURL",
+    "responseXML",
+    "restart",
+    "restartAfterDelay",
+    "restartIce",
+    "restore",
+    "restrictTo",
+    "result",
+    "resultIndex",
+    "resultType",
+    "results",
+    "resume",
+    "resumeDepthSensing",
+    "resumeProfilers",
+    "resumeTransformFeedback",
+    "retry",
+    "returnType",
+    "returnValue",
+    "rev",
+    "reverse",
+    "reversed",
+    "revocable",
+    "revokeObjectURL",
+    "rex",
+    "rgbColor",
+    "ric",
+    "right",
+    "rightContext",
+    "rightDegrees",
+    "rightMargin",
+    "rightProjectionMatrix",
+    "rightViewMatrix",
+    "rlh",
+    "role",
+    "rolloffFactor",
+    "root",
+    "rootBounds",
+    "rootElement",
+    "rootMargin",
+    "rotate",
+    "rotateAxisAngle",
+    "rotateAxisAngleSelf",
+    "rotateFromVector",
+    "rotateFromVectorSelf",
+    "rotateSelf",
+    "rotation",
+    "rotationAngle",
+    "rotationRate",
+    "round",
+    "roundRect",
+    "row-gap",
+    "rowGap",
+    "rowIndex",
+    "rowSpan",
+    "rows",
+    "rowsPerImage",
+    "rtcpTransport",
+    "rtt",
+    "ruby-align",
+    "ruby-position",
+    "rubyAlign",
+    "rubyOverhang",
+    "rubyPosition",
+    "rules",
+    "run",
+    "runAdAuction",
+    "runtime",
+    "runtimeStyle",
+    "rx",
+    "ry",
+    "s",
+    "safari",
+    "sameDocument",
+    "sample",
+    "sampleCount",
+    "sampleCoverage",
+    "sampleInterval",
+    "sampleRate",
+    "sampleType",
+    "sampler",
+    "samplerParameterf",
+    "samplerParameteri",
+    "sandbox",
+    "save",
+    "saveAsPDF",
+    "saveData",
+    "scale",
+    "scale3d",
+    "scale3dSelf",
+    "scaleNonUniform",
+    "scaleNonUniformSelf",
+    "scaleSelf",
+    "scheduler",
+    "scheduling",
+    "scheme",
+    "scissor",
+    "scope",
+    "scopeName",
+    "scoped",
+    "screen",
+    "screenBrightness",
+    "screenEnabled",
+    "screenLeft",
+    "screenPixelToMillimeterX",
+    "screenPixelToMillimeterY",
+    "screenState",
+    "screenTop",
+    "screenX",
+    "screenY",
+    "screens",
+    "scriptURL",
+    "scripting",
+    "scripts",
+    "scroll",
+    "scroll-behavior",
+    "scroll-margin",
+    "scroll-margin-block",
+    "scroll-margin-block-end",
+    "scroll-margin-block-start",
+    "scroll-margin-bottom",
+    "scroll-margin-inline",
+    "scroll-margin-inline-end",
+    "scroll-margin-inline-start",
+    "scroll-margin-left",
+    "scroll-margin-right",
+    "scroll-margin-top",
+    "scroll-padding",
+    "scroll-padding-block",
+    "scroll-padding-block-end",
+    "scroll-padding-block-start",
+    "scroll-padding-bottom",
+    "scroll-padding-inline",
+    "scroll-padding-inline-end",
+    "scroll-padding-inline-start",
+    "scroll-padding-left",
+    "scroll-padding-right",
+    "scroll-padding-top",
+    "scroll-snap-align",
+    "scroll-snap-stop",
+    "scroll-snap-type",
+    "scrollAmount",
+    "scrollBehavior",
+    "scrollBy",
+    "scrollByLines",
+    "scrollByPages",
+    "scrollDelay",
+    "scrollHeight",
+    "scrollIntoView",
+    "scrollIntoViewIfNeeded",
+    "scrollLeft",
+    "scrollLeftMax",
+    "scrollMargin",
+    "scrollMarginBlock",
+    "scrollMarginBlockEnd",
+    "scrollMarginBlockStart",
+    "scrollMarginBottom",
+    "scrollMarginInline",
+    "scrollMarginInlineEnd",
+    "scrollMarginInlineStart",
+    "scrollMarginLeft",
+    "scrollMarginRight",
+    "scrollMarginTop",
+    "scrollMaxX",
+    "scrollMaxY",
+    "scrollPadding",
+    "scrollPaddingBlock",
+    "scrollPaddingBlockEnd",
+    "scrollPaddingBlockStart",
+    "scrollPaddingBottom",
+    "scrollPaddingInline",
+    "scrollPaddingInlineEnd",
+    "scrollPaddingInlineStart",
+    "scrollPaddingLeft",
+    "scrollPaddingRight",
+    "scrollPaddingTop",
+    "scrollRestoration",
+    "scrollSnapAlign",
+    "scrollSnapStop",
+    "scrollSnapType",
+    "scrollTo",
+    "scrollTop",
+    "scrollTopMax",
+    "scrollWidth",
+    "scrollX",
+    "scrollY",
+    "scrollbar-color",
+    "scrollbar-gutter",
+    "scrollbar-width",
+    "scrollbar3dLightColor",
+    "scrollbarArrowColor",
+    "scrollbarBaseColor",
+    "scrollbarColor",
+    "scrollbarDarkShadowColor",
+    "scrollbarFaceColor",
+    "scrollbarGutter",
+    "scrollbarHighlightColor",
+    "scrollbarShadowColor",
+    "scrollbarTrackColor",
+    "scrollbarWidth",
+    "scrollbars",
+    "scrolling",
+    "scrollingElement",
+    "sctp",
+    "sctpCauseCode",
+    "sdp",
+    "sdpLineNumber",
+    "sdpMLineIndex",
+    "sdpMid",
+    "seal",
+    "search",
+    "searchBox",
+    "searchBoxJavaBridge_",
+    "searchParams",
+    "second",
+    "seconds",
+    "sectionRowIndex",
+    "secureConnectionStart",
+    "securePaymentConfirmationAvailability",
+    "security",
+    "seed",
+    "seek",
+    "seekToNextFrame",
+    "seekable",
+    "seeking",
+    "segments",
+    "select",
+    "selectAllChildren",
+    "selectAlternateInterface",
+    "selectAudioOutput",
+    "selectConfiguration",
+    "selectNode",
+    "selectNodeContents",
+    "selectNodes",
+    "selectSingleNode",
+    "selectSubString",
+    "selectURL",
+    "selected",
+    "selectedIndex",
+    "selectedOptions",
+    "selectedStyleSheetSet",
+    "selectedStylesheetSet",
+    "selectedTrack",
+    "selection",
+    "selectionDirection",
+    "selectionEnd",
+    "selectionStart",
+    "selector",
+    "selectorText",
+    "self",
+    "send",
+    "sendAsBinary",
+    "sendBeacon",
+    "sendFeatureReport",
+    "sendMessage",
+    "sendNativeMessage",
+    "sendOrder",
+    "sendReport",
+    "sender",
+    "sentAlert",
+    "sentTimestamp",
+    "separator",
+    "serial",
+    "serialNumber",
+    "serializable",
+    "serializeToString",
+    "serverTiming",
+    "service",
+    "serviceWorker",
+    "session",
+    "sessionId",
+    "sessionStorage",
+    "sessions",
+    "set",
+    "setActionHandler",
+    "setActive",
+    "setAlpha",
+    "setAppBadge",
+    "setAttribute",
+    "setAttributeNS",
+    "setAttributeNode",
+    "setAttributeNodeNS",
+    "setAttributionReporting",
+    "setBadgeBackgroundColor",
+    "setBadgeText",
+    "setBadgeTextColor",
+    "setBaseAndExtent",
+    "setBigInt64",
+    "setBigUint64",
+    "setBindGroup",
+    "setBingCurrentSearchDefault",
+    "setBlendConstant",
+    "setCameraActive",
+    "setCapture",
+    "setCaptureHandleConfig",
+    "setCodecPreferences",
+    "setColor",
+    "setCompositeOperation",
+    "setConfiguration",
+    "setConsumer",
+    "setCurrentTime",
+    "setCustomValidity",
+    "setData",
+    "setDate",
+    "setDragImage",
+    "setEnabled",
+    "setEnd",
+    "setEndAfter",
+    "setEndBefore",
+    "setEndPoint",
+    "setExpires",
+    "setFillColor",
+    "setFilterRes",
+    "setFloat16",
+    "setFloat32",
+    "setFloat64",
+    "setFloatValue",
+    "setFocusBehavior",
+    "setFormValue",
+    "setFromBase64",
+    "setFromHex",
+    "setFullYear",
+    "setHTMLUnsafe",
+    "setHeaderExtensionsToNegotiate",
+    "setHeaderValue",
+    "setHours",
+    "setIcon",
+    "setIdentityProvider",
+    "setImmediate",
+    "setIndexBuffer",
+    "setInt16",
+    "setInt32",
+    "setInt8",
+    "setInterval",
+    "setItem",
+    "setKeyframes",
+    "setLineCap",
+    "setLineDash",
+    "setLineJoin",
+    "setLineWidth",
+    "setLiveSeekableRange",
+    "setLocalDescription",
+    "setMatrix",
+    "setMatrixValue",
+    "setMediaKeys",
+    "setMicrophoneActive",
+    "setMilliseconds",
+    "setMinutes",
+    "setMiterLimit",
+    "setMonth",
+    "setNamedItem",
+    "setNamedItemNS",
+    "setNonUserCodeExceptions",
+    "setOrientToAngle",
+    "setOrientToAuto",
+    "setOrientation",
+    "setOverrideHistoryNavigationMode",
+    "setPaint",
+    "setParameter",
+    "setParameters",
+    "setPathData",
+    "setPeriodicWave",
+    "setPipeline",
+    "setPointerCapture",
+    "setPopup",
+    "setPosition",
+    "setPositionState",
+    "setPreference",
+    "setPriority",
+    "setPrivateToken",
+    "setProperty",
+    "setPrototypeOf",
+    "setRGBColor",
+    "setRGBColorICCColor",
+    "setRadius",
+    "setRangeText",
+    "setRemoteDescription",
+    "setReportEventDataForAutomaticBeacons",
+    "setRequestHeader",
+    "setResizable",
+    "setResourceTimingBufferSize",
+    "setRotate",
+    "setScale",
+    "setScissorRect",
+    "setSeconds",
+    "setSelectionRange",
+    "setServerCertificate",
+    "setShadow",
+    "setSharedStorageContext",
+    "setSignals",
+    "setSinkId",
+    "setSkewX",
+    "setSkewY",
+    "setStart",
+    "setStartAfter",
+    "setStartBefore",
+    "setStatus",
+    "setStdDeviation",
+    "setStencilReference",
+    "setStreams",
+    "setStrictMode",
+    "setStringValue",
+    "setStrokeColor",
+    "setSuggestResult",
+    "setTargetAtTime",
+    "setTargetValueAtTime",
+    "setTime",
+    "setTimeout",
+    "setTitle",
+    "setTransform",
+    "setTranslate",
+    "setUTCDate",
+    "setUTCFullYear",
+    "setUTCHours",
+    "setUTCMilliseconds",
+    "setUTCMinutes",
+    "setUTCMonth",
+    "setUTCSeconds",
+    "setUint16",
+    "setUint32",
+    "setUint8",
+    "setUninstallURL",
+    "setUpdateUrlData",
+    "setUri",
+    "setValidity",
+    "setValueAtTime",
+    "setValueCurveAtTime",
+    "setVariable",
+    "setVelocity",
+    "setVersion",
+    "setVertexBuffer",
+    "setViewport",
+    "setYear",
+    "setZoom",
+    "setZoomSettings",
+    "settingName",
+    "settingValue",
+    "sex",
+    "shaderLocation",
+    "shaderSource",
+    "shadowBlur",
+    "shadowColor",
+    "shadowOffsetX",
+    "shadowOffsetY",
+    "shadowRoot",
+    "shadowRootClonable",
+    "shadowRootDelegatesFocus",
+    "shadowRootMode",
+    "shadowRootSerializable",
+    "shape",
+    "shape-image-threshold",
+    "shape-margin",
+    "shape-outside",
+    "shape-rendering",
+    "shapeImageThreshold",
+    "shapeMargin",
+    "shapeOutside",
+    "shapeRendering",
+    "share",
+    "sharedContext",
+    "sharedStorage",
+    "sharedStorageWritable",
+    "sheet",
+    "shift",
+    "shiftKey",
+    "shiftLeft",
+    "shippingAddress",
+    "shippingOption",
+    "shippingType",
+    "show",
+    "showDirectoryPicker",
+    "showHelp",
+    "showModal",
+    "showModalDialog",
+    "showModelessDialog",
+    "showNotification",
+    "showOpenFilePicker",
+    "showPicker",
+    "showPopover",
+    "showSaveFilePicker",
+    "sidebar",
+    "sidebarAction",
+    "sign",
+    "signal",
+    "signalAllAcceptedCredentials",
+    "signalCurrentUserDetails",
+    "signalUnknownCredential",
+    "signalingState",
+    "signature",
+    "silent",
+    "sin",
+    "singleNodeValue",
+    "sinh",
+    "sinkId",
+    "sittingToStandingTransform",
+    "size",
+    "sizeAdjust",
+    "sizeToContent",
+    "sizeX",
+    "sizeZ",
+    "sizes",
+    "skewX",
+    "skewXSelf",
+    "skewY",
+    "skewYSelf",
+    "skipTransition",
+    "skipped",
+    "slice",
+    "slope",
+    "slot",
+    "slotAssignment",
+    "small",
+    "smil",
+    "smooth",
+    "smoothingTimeConstant",
+    "snapTargetBlock",
+    "snapTargetInline",
+    "snapToLines",
+    "snapshotItem",
+    "snapshotLength",
+    "some",
+    "sort",
+    "sortingCode",
+    "source",
+    "sourceBuffer",
+    "sourceBuffers",
+    "sourceCapabilities",
+    "sourceCharPosition",
+    "sourceElement",
+    "sourceFile",
+    "sourceFunctionName",
+    "sourceIndex",
+    "sourceLanguage",
+    "sourceMap",
+    "sourceURL",
+    "sources",
+    "spacing",
+    "span",
+    "speak",
+    "speakAs",
+    "speaking",
+    "species",
+    "specified",
+    "specularConstant",
+    "specularExponent",
+    "speechSynthesis",
+    "speed",
+    "speedOfSound",
+    "spellcheck",
+    "sphericalHarmonicsCoefficients",
+    "splice",
+    "split",
+    "splitText",
+    "spreadMethod",
+    "sqrt",
+    "src",
+    "srcElement",
+    "srcFactor",
+    "srcFilter",
+    "srcObject",
+    "srcUrn",
+    "srcdoc",
+    "srclang",
+    "srcset",
+    "stack",
+    "stackTraceLimit",
+    "stacktrace",
+    "stageParameters",
+    "standalone",
+    "standby",
+    "start",
+    "startContainer",
+    "startE",
+    "startIce",
+    "startLoadTime",
+    "startMessages",
+    "startNotifications",
+    "startOffset",
+    "startProfiling",
+    "startRendering",
+    "startShark",
+    "startTime",
+    "startViewTransition",
+    "startsWith",
+    "state",
+    "states",
+    "stats",
+    "status",
+    "statusCode",
+    "statusMessage",
+    "statusText",
+    "statusbar",
+    "stdDeviationX",
+    "stdDeviationY",
+    "stencilBack",
+    "stencilClearValue",
+    "stencilFront",
+    "stencilFunc",
+    "stencilFuncSeparate",
+    "stencilLoadOp",
+    "stencilMask",
+    "stencilMaskSeparate",
+    "stencilOp",
+    "stencilOpSeparate",
+    "stencilReadMask",
+    "stencilReadOnly",
+    "stencilStoreOp",
+    "stencilWriteMask",
+    "step",
+    "stepDown",
+    "stepMismatch",
+    "stepMode",
+    "stepUp",
+    "sticky",
+    "stitchTiles",
+    "stop",
+    "stop-color",
+    "stop-opacity",
+    "stopColor",
+    "stopImmediatePropagation",
+    "stopNotifications",
+    "stopOpacity",
+    "stopProfiling",
+    "stopPropagation",
+    "stopShark",
+    "stopped",
+    "storage",
+    "storageArea",
+    "storageBuckets",
+    "storageName",
+    "storageStatus",
+    "storageTexture",
+    "store",
+    "storeOp",
+    "storeSiteSpecificTrackingException",
+    "storeWebWideTrackingException",
+    "stpVersion",
+    "stream",
+    "streamErrorCode",
+    "streams",
+    "stretch",
+    "strike",
+    "string",
+    "stringValue",
+    "stringify",
+    "stripIndexFormat",
+    "stroke",
+    "stroke-dasharray",
+    "stroke-dashoffset",
+    "stroke-linecap",
+    "stroke-linejoin",
+    "stroke-miterlimit",
+    "stroke-opacity",
+    "stroke-width",
+    "strokeDasharray",
+    "strokeDashoffset",
+    "strokeLinecap",
+    "strokeLinejoin",
+    "strokeMiterlimit",
+    "strokeOpacity",
+    "strokeRect",
+    "strokeStyle",
+    "strokeText",
+    "strokeWidth",
+    "structuredClone",
+    "style",
+    "styleAndLayoutStart",
+    "styleFloat",
+    "styleMap",
+    "styleMedia",
+    "styleSheet",
+    "styleSheetSets",
+    "styleSheets",
+    "styleset",
+    "stylistic",
+    "sub",
+    "subarray",
+    "subgroupMaxSize",
+    "subgroupMinSize",
+    "subject",
+    "submit",
+    "submitFrame",
+    "submitter",
+    "subscribe",
+    "substr",
+    "substring",
+    "substringData",
+    "subtle",
+    "subtree",
+    "suffix",
+    "suffixes",
+    "sumPrecise",
+    "summarize",
+    "summarizeStreaming",
+    "summary",
+    "sup",
+    "supported",
+    "supportedContentEncodings",
+    "supportedEntryTypes",
+    "supportedValuesOf",
+    "supports",
+    "supportsFiber",
+    "supportsSession",
+    "supportsText",
+    "suppressed",
+    "surfaceScale",
+    "surroundContents",
+    "suspend",
+    "suspendRedraw",
+    "svb",
+    "svh",
+    "svi",
+    "svmax",
+    "svmin",
+    "svw",
+    "swapCache",
+    "swapNode",
+    "swash",
+    "sweepFlag",
+    "switchMap",
+    "symbols",
+    "symmetricDifference",
+    "sync",
+    "syntax",
+    "sysexEnabled",
+    "system",
+    "systemCode",
+    "systemId",
+    "systemLanguage",
+    "systemXDPI",
+    "systemYDPI",
+    "tBodies",
+    "tFoot",
+    "tHead",
+    "tab",
+    "tab-size",
+    "tabId",
+    "tabIds",
+    "tabIndex",
+    "tabSize",
+    "table",
+    "table-layout",
+    "tableLayout",
+    "tableValues",
+    "tabs",
+    "tag",
+    "tagName",
+    "tagUrn",
+    "tags",
+    "taintEnabled",
+    "take",
+    "takePhoto",
+    "takeRecords",
+    "takeUntil",
+    "tan",
+    "tangentialPressure",
+    "tanh",
+    "target",
+    "targetAddressSpace",
+    "targetElement",
+    "targetLanguage",
+    "targetRayMode",
+    "targetRaySpace",
+    "targetTouches",
+    "targetURL",
+    "targetX",
+    "targetY",
+    "targets",
+    "tcpType",
+    "tee",
+    "tel",
+    "telemetry",
+    "terminate",
+    "test",
+    "texImage2D",
+    "texImage3D",
+    "texParameterf",
+    "texParameteri",
+    "texStorage2D",
+    "texStorage3D",
+    "texSubImage2D",
+    "texSubImage3D",
+    "text",
+    "text-align",
+    "text-align-last",
+    "text-anchor",
+    "text-combine-upright",
+    "text-decoration",
+    "text-decoration-color",
+    "text-decoration-line",
+    "text-decoration-skip-ink",
+    "text-decoration-style",
+    "text-decoration-thickness",
+    "text-emphasis",
+    "text-emphasis-color",
+    "text-emphasis-position",
+    "text-emphasis-style",
+    "text-indent",
+    "text-justify",
+    "text-orientation",
+    "text-overflow",
+    "text-rendering",
+    "text-shadow",
+    "text-transform",
+    "text-underline-offset",
+    "text-underline-position",
+    "text-wrap",
+    "text-wrap-mode",
+    "text-wrap-style",
+    "textAlign",
+    "textAlignLast",
+    "textAnchor",
+    "textAutospace",
+    "textBaseline",
+    "textCombineUpright",
+    "textContent",
+    "textDecoration",
+    "textDecorationBlink",
+    "textDecorationColor",
+    "textDecorationInset",
+    "textDecorationLine",
+    "textDecorationLineThrough",
+    "textDecorationNone",
+    "textDecorationOverline",
+    "textDecorationSkipInk",
+    "textDecorationStyle",
+    "textDecorationThickness",
+    "textDecorationUnderline",
+    "textEmphasis",
+    "textEmphasisColor",
+    "textEmphasisPosition",
+    "textEmphasisStyle",
+    "textIndent",
+    "textJustify",
+    "textJustifyTrim",
+    "textKashida",
+    "textKashidaSpace",
+    "textLength",
+    "textOrientation",
+    "textOverflow",
+    "textRendering",
+    "textShadow",
+    "textTracks",
+    "textTransform",
+    "textUnderlineOffset",
+    "textUnderlinePosition",
+    "textWrap",
+    "textWrapMode",
+    "textWrapStyle",
+    "texture",
+    "theme",
+    "then",
+    "threadId",
+    "threshold",
+    "thresholds",
+    "throwIfAborted",
+    "tiltX",
+    "tiltY",
+    "time",
+    "timeEnd",
+    "timeLog",
+    "timeOrigin",
+    "timeRemaining",
+    "timeStamp",
+    "timeStyle",
+    "timeZone",
+    "timeZoneName",
+    "timecode",
+    "timeline",
+    "timelineTime",
+    "timeout",
+    "timestamp",
+    "timestampOffset",
+    "timestampWrites",
+    "timing",
+    "title",
+    "titlebarAreaRect",
+    "tlsChannelId",
+    "to",
+    "toArray",
+    "toBase64",
+    "toBlob",
+    "toDataURL",
+    "toDateString",
+    "toElement",
+    "toExponential",
+    "toFixed",
+    "toFloat32Array",
+    "toFloat64Array",
+    "toGMTString",
+    "toHex",
+    "toISOString",
+    "toJSON",
+    "toLocaleDateString",
+    "toLocaleFormat",
+    "toLocaleLowerCase",
+    "toLocaleString",
+    "toLocaleTimeString",
+    "toLocaleUpperCase",
+    "toLowerCase",
+    "toMatrix",
+    "toMethod",
+    "toPrecision",
+    "toPrimitive",
+    "toReversed",
+    "toSdp",
+    "toSorted",
+    "toSource",
+    "toSpliced",
+    "toStaticHTML",
+    "toString",
+    "toStringTag",
+    "toSum",
+    "toTemporalInstant",
+    "toTimeString",
+    "toUTCString",
+    "toUpperCase",
+    "toWellFormed",
+    "toggle",
+    "toggleAttribute",
+    "toggleLongPressEnabled",
+    "togglePopover",
+    "toggleReaderMode",
+    "token",
+    "tone",
+    "toneBuffer",
+    "tooLong",
+    "tooShort",
+    "toolbar",
+    "top",
+    "topMargin",
+    "topSites",
+    "topology",
+    "total",
+    "totalFrameDelay",
+    "totalFrames",
+    "totalFramesDuration",
+    "totalVideoFrames",
+    "touch-action",
+    "touchAction",
+    "touched",
+    "touches",
+    "trace",
+    "track",
+    "trackVisibility",
+    "trackedAnchors",
+    "tracks",
+    "tran",
+    "transaction",
+    "transactions",
+    "transceiver",
+    "transfer",
+    "transferControlToOffscreen",
+    "transferFromImageBitmap",
+    "transferImageBitmap",
+    "transferIn",
+    "transferOut",
+    "transferSize",
+    "transferToFixedLength",
+    "transferToImageBitmap",
+    "transform",
+    "transform-box",
+    "transform-origin",
+    "transform-style",
+    "transformBox",
+    "transformFeedbackVaryings",
+    "transformOrigin",
+    "transformPoint",
+    "transformString",
+    "transformStyle",
+    "transformToDocument",
+    "transformToFragment",
+    "transition",
+    "transition-behavior",
+    "transition-delay",
+    "transition-duration",
+    "transition-property",
+    "transition-timing-function",
+    "transitionBehavior",
+    "transitionDelay",
+    "transitionDuration",
+    "transitionProperty",
+    "transitionTimingFunction",
+    "translate",
+    "translateSelf",
+    "translateStreaming",
+    "translationX",
+    "translationY",
+    "transport",
+    "traverseTo",
+    "trim",
+    "trimEnd",
+    "trimLeft",
+    "trimRight",
+    "trimStart",
+    "trueSpeed",
+    "trunc",
+    "truncate",
+    "trustedTypes",
+    "try",
+    "turn",
+    "twist",
+    "type",
+    "typeDetail",
+    "typeMismatch",
+    "typeMustMatch",
+    "types",
+    "u2f",
+    "ubound",
+    "uint16",
+    "uint32",
+    "uint8",
+    "uint8Clamped",
+    "unadjustedMovement",
+    "unclippedDepth",
+    "unconfigure",
+    "undefined",
+    "underlineStyle",
+    "underlineThickness",
+    "unescape",
+    "uneval",
+    "ungroup",
+    "unicode",
+    "unicode-bidi",
+    "unicodeBidi",
+    "unicodeRange",
+    "unicodeSets",
+    "uniform1f",
+    "uniform1fv",
+    "uniform1i",
+    "uniform1iv",
+    "uniform1ui",
+    "uniform1uiv",
+    "uniform2f",
+    "uniform2fv",
+    "uniform2i",
+    "uniform2iv",
+    "uniform2ui",
+    "uniform2uiv",
+    "uniform3f",
+    "uniform3fv",
+    "uniform3i",
+    "uniform3iv",
+    "uniform3ui",
+    "uniform3uiv",
+    "uniform4f",
+    "uniform4fv",
+    "uniform4i",
+    "uniform4iv",
+    "uniform4ui",
+    "uniform4uiv",
+    "uniformBlockBinding",
+    "uniformMatrix2fv",
+    "uniformMatrix2x3fv",
+    "uniformMatrix2x4fv",
+    "uniformMatrix3fv",
+    "uniformMatrix3x2fv",
+    "uniformMatrix3x4fv",
+    "uniformMatrix4fv",
+    "uniformMatrix4x2fv",
+    "uniformMatrix4x3fv",
+    "uninstallSelf",
+    "union",
+    "unique",
+    "uniqueID",
+    "uniqueNumber",
+    "unit",
+    "unitType",
+    "units",
+    "unloadEventEnd",
+    "unloadEventStart",
+    "unlock",
+    "unmap",
+    "unmount",
+    "unobserve",
+    "unpackColorSpace",
+    "unpause",
+    "unpauseAnimations",
+    "unreadCount",
+    "unregister",
+    "unregisterContentHandler",
+    "unregisterProtocolHandler",
+    "unscopables",
+    "unselectable",
+    "unshift",
+    "unsubscribe",
+    "unsuspendRedraw",
+    "unsuspendRedrawAll",
+    "unwatch",
+    "unwrapKey",
+    "upDegrees",
+    "upX",
+    "upY",
+    "upZ",
+    "update",
+    "updateAdInterestGroups",
+    "updateCallbackDone",
+    "updateCharacterBounds",
+    "updateCommands",
+    "updateControlBounds",
+    "updateCurrentEntry",
+    "updateIce",
+    "updateInkTrailStartPoint",
+    "updateInterval",
+    "updatePlaybackRate",
+    "updateRangeEnd",
+    "updateRangeStart",
+    "updateRenderState",
+    "updateSelection",
+    "updateSelectionBounds",
+    "updateSettings",
+    "updateText",
+    "updateTiming",
+    "updateViaCache",
+    "updateWith",
+    "updated",
+    "updating",
+    "upgrade",
+    "upload",
+    "uploadTotal",
+    "uploaded",
+    "upper",
+    "upperBound",
+    "upperOpen",
+    "uri",
+    "url",
+    "urn",
+    "urns",
+    "usage",
+    "usages",
+    "usb",
+    "usbVersionMajor",
+    "usbVersionMinor",
+    "usbVersionSubminor",
+    "use",
+    "useCurrentView",
+    "useMap",
+    "useProgram",
+    "usedSpace",
+    "user-select",
+    "userActivation",
+    "userAgent",
+    "userAgentAllowsProtocol",
+    "userAgentData",
+    "userChoice",
+    "userHandle",
+    "userHint",
+    "userInitiated",
+    "userLanguage",
+    "userSelect",
+    "userState",
+    "userVisibleOnly",
+    "username",
+    "usernameFragment",
+    "utterance",
+    "uuid",
+    "v8BreakIterator",
+    "vAlign",
+    "vLink",
+    "valid",
+    "validate",
+    "validateProgram",
+    "validationMessage",
+    "validity",
+    "value",
+    "valueAsDate",
+    "valueAsNumber",
+    "valueAsString",
+    "valueInSpecifiedUnits",
+    "valueMissing",
+    "valueOf",
+    "valueText",
+    "valueType",
+    "values",
+    "variable",
+    "variant",
+    "variationSettings",
+    "vb",
+    "vector-effect",
+    "vectorEffect",
+    "velocityAngular",
+    "velocityExpansion",
+    "velocityX",
+    "velocityY",
+    "vendor",
+    "vendorId",
+    "vendorSub",
+    "verify",
+    "version",
+    "vertex",
+    "vertexAttrib1f",
+    "vertexAttrib1fv",
+    "vertexAttrib2f",
+    "vertexAttrib2fv",
+    "vertexAttrib3f",
+    "vertexAttrib3fv",
+    "vertexAttrib4f",
+    "vertexAttrib4fv",
+    "vertexAttribDivisor",
+    "vertexAttribDivisorANGLE",
+    "vertexAttribI4i",
+    "vertexAttribI4iv",
+    "vertexAttribI4ui",
+    "vertexAttribI4uiv",
+    "vertexAttribIPointer",
+    "vertexAttribPointer",
+    "vertical",
+    "vertical-align",
+    "verticalAlign",
+    "verticalOverflow",
+    "vh",
+    "vi",
+    "vibrate",
+    "vibrationActuator",
+    "videoBitsPerSecond",
+    "videoHeight",
+    "videoTracks",
+    "videoWidth",
+    "view",
+    "viewBox",
+    "viewBoxString",
+    "viewDimension",
+    "viewFormats",
+    "viewTarget",
+    "viewTargetString",
+    "viewTransition",
+    "viewTransitionClass",
+    "viewTransitionName",
+    "viewport",
+    "viewportAnchorX",
+    "viewportAnchorY",
+    "viewportElement",
+    "views",
+    "violatedDirective",
+    "virtualKeyboard",
+    "virtualKeyboardPolicy",
+    "visibility",
+    "visibilityState",
+    "visible",
+    "visibleRect",
+    "visualViewport",
+    "vlinkColor",
+    "vmax",
+    "vmin",
+    "voice",
+    "voiceURI",
+    "volume",
+    "vrml",
+    "vspace",
+    "vw",
+    "w",
+    "wait",
+    "waitAsync",
+    "waitSync",
+    "waiting",
+    "wake",
+    "wakeLock",
+    "wand",
+    "warmup",
+    "warn",
+    "wasAlternateProtocolAvailable",
+    "wasClean",
+    "wasDiscarded",
+    "wasFetchedViaSpdy",
+    "wasNpnNegotiated",
+    "watch",
+    "watchAvailability",
+    "watchPosition",
+    "webNavigation",
+    "webRequest",
+    "webdriver",
+    "webkitAddKey",
+    "webkitAlignContent",
+    "webkitAlignItems",
+    "webkitAlignSelf",
+    "webkitAnimation",
+    "webkitAnimationDelay",
+    "webkitAnimationDirection",
+    "webkitAnimationDuration",
+    "webkitAnimationFillMode",
+    "webkitAnimationIterationCount",
+    "webkitAnimationName",
+    "webkitAnimationPlayState",
+    "webkitAnimationTimingFunction",
+    "webkitAppearance",
+    "webkitAudioContext",
+    "webkitAudioDecodedByteCount",
+    "webkitAudioPannerNode",
+    "webkitBackfaceVisibility",
+    "webkitBackground",
+    "webkitBackgroundAttachment",
+    "webkitBackgroundClip",
+    "webkitBackgroundColor",
+    "webkitBackgroundImage",
+    "webkitBackgroundOrigin",
+    "webkitBackgroundPosition",
+    "webkitBackgroundPositionX",
+    "webkitBackgroundPositionY",
+    "webkitBackgroundRepeat",
+    "webkitBackgroundSize",
+    "webkitBackingStorePixelRatio",
+    "webkitBorderBottomLeftRadius",
+    "webkitBorderBottomRightRadius",
+    "webkitBorderImage",
+    "webkitBorderImageOutset",
+    "webkitBorderImageRepeat",
+    "webkitBorderImageSlice",
+    "webkitBorderImageSource",
+    "webkitBorderImageWidth",
+    "webkitBorderRadius",
+    "webkitBorderTopLeftRadius",
+    "webkitBorderTopRightRadius",
+    "webkitBoxAlign",
+    "webkitBoxDirection",
+    "webkitBoxFlex",
+    "webkitBoxOrdinalGroup",
+    "webkitBoxOrient",
+    "webkitBoxPack",
+    "webkitBoxShadow",
+    "webkitBoxSizing",
+    "webkitCancelAnimationFrame",
+    "webkitCancelFullScreen",
+    "webkitCancelKeyRequest",
+    "webkitCancelRequestAnimationFrame",
+    "webkitClearResourceTimings",
+    "webkitClipPath",
+    "webkitClosedCaptionsVisible",
+    "webkitConvertPointFromNodeToPage",
+    "webkitConvertPointFromPageToNode",
+    "webkitCreateShadowRoot",
+    "webkitCurrentFullScreenElement",
+    "webkitCurrentPlaybackTargetIsWireless",
+    "webkitDecodedFrameCount",
+    "webkitDirectionInvertedFromDevice",
+    "webkitDisplayingFullscreen",
+    "webkitDroppedFrameCount",
+    "webkitEnterFullScreen",
+    "webkitEnterFullscreen",
+    "webkitEntries",
+    "webkitExitFullScreen",
+    "webkitExitFullscreen",
+    "webkitExitPointerLock",
+    "webkitFilter",
+    "webkitFlex",
+    "webkitFlexBasis",
+    "webkitFlexDirection",
+    "webkitFlexFlow",
+    "webkitFlexGrow",
+    "webkitFlexShrink",
+    "webkitFlexWrap",
+    "webkitFontFeatureSettings",
+    "webkitFullScreenKeyboardInputAllowed",
+    "webkitFullscreenElement",
+    "webkitFullscreenEnabled",
+    "webkitGenerateKeyRequest",
+    "webkitGetAsEntry",
+    "webkitGetDatabaseNames",
+    "webkitGetEntries",
+    "webkitGetEntriesByName",
+    "webkitGetEntriesByType",
+    "webkitGetFlowByName",
+    "webkitGetGamepads",
+    "webkitGetImageDataHD",
+    "webkitGetNamedFlows",
+    "webkitGetRegionFlowRanges",
+    "webkitGetUserMedia",
+    "webkitHasClosedCaptions",
+    "webkitHidden",
+    "webkitIDBCursor",
+    "webkitIDBDatabase",
+    "webkitIDBDatabaseError",
+    "webkitIDBDatabaseException",
+    "webkitIDBFactory",
+    "webkitIDBIndex",
+    "webkitIDBKeyRange",
+    "webkitIDBObjectStore",
+    "webkitIDBRequest",
+    "webkitIDBTransaction",
+    "webkitImageSmoothingEnabled",
+    "webkitIndexedDB",
+    "webkitInitMessageEvent",
+    "webkitIsFullScreen",
+    "webkitJustifyContent",
+    "webkitKeys",
+    "webkitLineClamp",
+    "webkitLineDashOffset",
+    "webkitLockOrientation",
+    "webkitMask",
+    "webkitMaskClip",
+    "webkitMaskComposite",
+    "webkitMaskImage",
+    "webkitMaskOrigin",
+    "webkitMaskPosition",
+    "webkitMaskPositionX",
+    "webkitMaskPositionY",
+    "webkitMaskRepeat",
+    "webkitMaskSize",
+    "webkitMatchesSelector",
+    "webkitMediaStream",
+    "webkitNotifications",
+    "webkitOfflineAudioContext",
+    "webkitOrder",
+    "webkitOrientation",
+    "webkitPeerConnection00",
+    "webkitPersistentStorage",
+    "webkitPerspective",
+    "webkitPerspectiveOrigin",
+    "webkitPointerLockElement",
+    "webkitPostMessage",
+    "webkitPreservesPitch",
+    "webkitPutImageDataHD",
+    "webkitRTCPeerConnection",
+    "webkitRegionOverset",
+    "webkitRelativePath",
+    "webkitRequestAnimationFrame",
+    "webkitRequestFileSystem",
+    "webkitRequestFullScreen",
+    "webkitRequestFullscreen",
+    "webkitRequestPointerLock",
+    "webkitResolveLocalFileSystemURL",
+    "webkitSetMediaKeys",
+    "webkitSetResourceTimingBufferSize",
+    "webkitShadowRoot",
+    "webkitShowPlaybackTargetPicker",
+    "webkitSlice",
+    "webkitSpeechGrammar",
+    "webkitSpeechGrammarList",
+    "webkitSpeechRecognition",
+    "webkitSpeechRecognitionError",
+    "webkitSpeechRecognitionEvent",
+    "webkitStorageInfo",
+    "webkitSupportsFullscreen",
+    "webkitTemporaryStorage",
+    "webkitTextFillColor",
+    "webkitTextSecurity",
+    "webkitTextSizeAdjust",
+    "webkitTextStroke",
+    "webkitTextStrokeColor",
+    "webkitTextStrokeWidth",
+    "webkitTransform",
+    "webkitTransformOrigin",
+    "webkitTransformStyle",
+    "webkitTransition",
+    "webkitTransitionDelay",
+    "webkitTransitionDuration",
+    "webkitTransitionProperty",
+    "webkitTransitionTimingFunction",
+    "webkitURL",
+    "webkitUnlockOrientation",
+    "webkitUserSelect",
+    "webkitVideoDecodedByteCount",
+    "webkitVisibilityState",
+    "webkitWirelessVideoPlaybackDisabled",
+    "webkitdirectory",
+    "webkitdropzone",
+    "webstore",
+    "weekday",
+    "weeks",
+    "weight",
+    "wgslLanguageFeatures",
+    "whatToShow",
+    "wheelDelta",
+    "wheelDeltaX",
+    "wheelDeltaY",
+    "when",
+    "whenDefined",
+    "which",
+    "white-space",
+    "white-space-collapse",
+    "whiteSpace",
+    "whiteSpaceCollapse",
+    "wholeText",
+    "widows",
+    "width",
+    "will-change",
+    "willChange",
+    "willValidate",
+    "window",
+    "windowAttribution",
+    "windowControlsOverlay",
+    "windowId",
+    "windowIds",
+    "windows",
+    "with",
+    "withCredentials",
+    "withResolvers",
+    "word-break",
+    "word-spacing",
+    "word-wrap",
+    "wordBreak",
+    "wordSpacing",
+    "wordWrap",
+    "workerCacheLookupStart",
+    "workerFinalSourceType",
+    "workerMatchedSourceType",
+    "workerRouterEvaluationStart",
+    "workerStart",
+    "worklet",
+    "wow64",
+    "wrap",
+    "wrapKey",
+    "writable",
+    "writableAuxiliaries",
+    "write",
+    "writeBuffer",
+    "writeMask",
+    "writeText",
+    "writeTexture",
+    "writeTimestamp",
+    "writeValue",
+    "writeValueWithResponse",
+    "writeValueWithoutResponse",
+    "writeWithoutResponse",
+    "writeln",
+    "writing-mode",
+    "writingMode",
+    "writingSuggestions",
+    "x",
+    "x1",
+    "x2",
+    "xChannelSelector",
+    "xmlEncoding",
+    "xmlStandalone",
+    "xmlVersion",
+    "xmlbase",
+    "xmllang",
+    "xmlspace",
+    "xor",
+    "xr",
+    "y",
+    "y1",
+    "y2",
+    "yChannelSelector",
+    "yandex",
+    "year",
+    "years",
+    "yield",
+    "z",
+    "z-index",
+    "zIndex",
+    "zoom",
+    "zoomAndPan",
+    "zoomLevel",
+    "zoomRectScreen",
+];
Index: frontend/node_modules/terser/tools/exit.cjs
===================================================================
--- frontend/node_modules/terser/tools/exit.cjs	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/tools/exit.cjs	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,7 @@
+// workaround for tty output truncation upon process.exit()
+// https://github.com/nodejs/node/issues/6456
+
+[process.stdout, process.stderr].forEach((s) => {
+  s && s.isTTY && s._handle && s._handle.setBlocking &&
+    s._handle.setBlocking(true)
+});
Index: frontend/node_modules/terser/tools/props.html
===================================================================
--- frontend/node_modules/terser/tools/props.html	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/tools/props.html	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,80 @@
+<html>
+  <head>
+  </head>
+  <body>
+    <script>(function(){
+      var props = {};
+
+      function addObject(obj) {
+        if (obj == null) return;
+        try {
+          Object.getOwnPropertyNames(obj).forEach(add);
+        } catch(ex) {}
+        if (obj.prototype) {
+          Object.getOwnPropertyNames(obj.prototype).forEach(add);
+        }
+        if (typeof obj == "function") {
+          try {
+            Object.getOwnPropertyNames(new obj).forEach(add);
+          } catch(ex) {}
+        }
+      }
+
+      function add(name) {
+        if (/^[a-z_$][a-z0-9_$]*$/i.test(name)) {
+            props[name] = true;
+        }
+      }
+
+      Object.getOwnPropertyNames(window).forEach(function(thing){
+        addObject(window[thing]);
+      });
+
+      try {
+        addObject(new Event("click"));
+        addObject(new Event("contextmenu"));
+        addObject(new Event("mouseup"));
+        addObject(new Event("mousedown"));
+        addObject(new Event("keydown"));
+        addObject(new Event("keypress"));
+        addObject(new Event("keyup"));
+        addObject(new Event("input"));
+        addObject(new Event("touchstart"));
+        addObject(new Event("touchmove"));
+        addObject(new Event("touchend"));
+        addObject(new Event("touchcancel"));
+        addObject(new Event("pointerdown"));
+        addObject(new Event("pointermove"));
+        addObject(new Event("pointerup"));
+        addObject(new Event("pointercancel"));
+        addObject(new Event("pointerenter"));
+        addObject(new Event("pointerleave"));
+      } catch(ex) {console.error(ex)}
+
+      try {
+        addObject(Temporal.Duration.from({ years: 1 }));
+        addObject(new Temporal.Instant());
+        addObject(Temporal.Now);
+        addObject(new Temporal.PlainDate(2021, 7, 1));
+        addObject(new Temporal.ZonedDateTime(0n, "America/New_York"));
+        addObject(new Temporal.PlainYearMonth(2021, 7));
+        addObject(new Temporal.PlainTime());
+        addObject(new Temporal.PlainMonthDay(7, 1));
+        addObject(new Temporal.PlainDateTime(2021, 7, 1));
+      } catch(ex) {console.error(ex)}
+
+      var ta = document.createElement("textarea");
+      ta.style.width = "100%";
+      ta.style.height = "20em";
+      ta.style.boxSizing = "border-box";
+      ta.value = 'export var domprops = ' + JSON.stringify(Object.keys(props).sort(cmp), null, 4);
+      document.body.appendChild(ta);
+
+      function cmp(a, b) {
+        a = a.toLowerCase();
+        b = b.toLowerCase();
+        return a < b ? -1 : a > b ? 1 : 0;
+      }
+    })();</script>
+  </body>
+</html>
Index: frontend/node_modules/terser/tools/terser.d.ts
===================================================================
--- frontend/node_modules/terser/tools/terser.d.ts	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/terser/tools/terser.d.ts	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,219 @@
+/// <reference lib="es2015" />
+
+import { SectionedSourceMapInput, EncodedSourceMap, DecodedSourceMap } from '@jridgewell/source-map';
+
+export type ECMA = 5 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025;
+
+export type ConsoleProperty = keyof typeof console;
+type DropConsoleOption = boolean | ConsoleProperty[];
+
+export interface ParseOptions {
+    bare_returns?: boolean;
+    /** @deprecated legacy option. Currently, all supported EcmaScript is valid to parse. */
+    ecma?: ECMA;
+    html5_comments?: boolean;
+    shebang?: boolean;
+}
+
+export interface CompressOptions {
+    arguments?: boolean;
+    arrows?: boolean;
+    booleans_as_integers?: boolean;
+    booleans?: boolean;
+    collapse_vars?: boolean;
+    comparisons?: boolean;
+    computed_props?: boolean;
+    conditionals?: boolean;
+    dead_code?: boolean;
+    defaults?: boolean;
+    directives?: boolean;
+    drop_console?: DropConsoleOption;
+    drop_debugger?: boolean;
+    ecma?: ECMA;
+    builtins_ecma?: ECMA;
+    builtins_pure?: boolean;
+    evaluate?: boolean;
+    expression?: boolean;
+    global_defs?: object;
+    hoist_funs?: boolean;
+    hoist_props?: boolean;
+    hoist_vars?: boolean;
+    ie8?: boolean;
+    if_return?: boolean;
+    inline?: boolean | InlineFunctions;
+    join_vars?: boolean;
+    keep_classnames?: boolean | RegExp;
+    keep_fargs?: boolean;
+    keep_fnames?: boolean | RegExp;
+    keep_infinity?: boolean;
+    lhs_constants?: boolean;
+    loops?: boolean;
+    module?: boolean;
+    negate_iife?: boolean;
+    passes?: number;
+    properties?: boolean;
+    pure_funcs?: string[];
+    pure_new?: boolean;
+    pure_getters?: boolean | 'strict';
+    reduce_funcs?: boolean;
+    reduce_vars?: boolean;
+    sequences?: boolean | number;
+    side_effects?: boolean;
+    switches?: boolean;
+    toplevel?: boolean;
+    top_retain?: null | string | string[] | RegExp;
+    typeofs?: boolean;
+    unsafe_arrows?: boolean;
+    unsafe?: boolean;
+    unsafe_comps?: boolean;
+    unsafe_Function?: boolean;
+    unsafe_math?: boolean;
+    unsafe_symbols?: boolean;
+    unsafe_methods?: boolean;
+    unsafe_proto?: boolean;
+    unsafe_regexp?: boolean;
+    unsafe_undefined?: boolean;
+    unused?: boolean;
+}
+
+export enum InlineFunctions {
+    Disabled = 0,
+    SimpleFunctions = 1,
+    WithArguments = 2,
+    WithArgumentsAndVariables = 3
+}
+
+export interface MangleOptions {
+    eval?: boolean;
+    keep_classnames?: boolean | RegExp;
+    keep_fnames?: boolean | RegExp;
+    module?: boolean;
+    nth_identifier?: SimpleIdentifierMangler | WeightedIdentifierMangler;
+    properties?: boolean | ManglePropertiesOptions;
+    reserved?: string[];
+    safari10?: boolean;
+    toplevel?: boolean;
+}
+
+/**
+ * An identifier mangler for which the output is invariant with respect to the source code.
+ */
+export interface SimpleIdentifierMangler {
+    /**
+     * Obtains the nth most favored (usually shortest) identifier to rename a variable to.
+     * The mangler will increment n and retry until the return value is not in use in scope, and is not a reserved word.
+     * This function is expected to be stable; Evaluating get(n) === get(n) should always return true.
+     * @param n The ordinal of the identifier.
+     */
+    get(n: number): string;
+}
+
+/**
+ * An identifier mangler that leverages character frequency analysis to determine identifier precedence.
+ */
+export interface WeightedIdentifierMangler extends SimpleIdentifierMangler {
+    /**
+     * Modifies the internal weighting of the input characters by the specified delta.
+     * Will be invoked on the entire printed AST, and then deduct mangleable identifiers.
+     * @param chars The characters to modify the weighting of.
+     * @param delta The numeric weight to add to the characters.
+     */
+    consider(chars: string, delta: number): number;
+    /**
+     * Resets character weights.
+     */
+    reset(): void;
+    /**
+     * Sorts identifiers by character frequency, in preparation for calls to get(n).
+     */
+    sort(): void;
+}
+
+export interface ManglePropertiesOptions {
+    builtins?: boolean;
+    debug?: boolean;
+    keep_quoted?: boolean | 'strict';
+    nth_identifier?: SimpleIdentifierMangler | WeightedIdentifierMangler;
+    regex?: RegExp | string;
+    reserved?: string[];
+}
+
+export interface FormatOptions {
+    ascii_only?: boolean;
+    /** @deprecated Not implemented anymore */
+    beautify?: boolean;
+    braces?: boolean;
+    comments?: boolean | 'all' | 'some' | RegExp | ( (node: any, comment: {
+        value: string,
+        type: 'comment1' | 'comment2' | 'comment3' | 'comment4',
+        pos: number,
+        line: number,
+        col: number,
+    }) => boolean );
+    ecma?: ECMA;
+    ie8?: boolean;
+    keep_numbers?: boolean;
+    indent_level?: number;
+    indent_start?: number;
+    inline_script?: boolean;
+    keep_quoted_props?: boolean;
+    max_line_len?: number | false;
+    preamble?: string;
+    preserve_annotations?: boolean;
+    quote_keys?: boolean;
+    quote_style?: OutputQuoteStyle;
+    safari10?: boolean;
+    semicolons?: boolean;
+    shebang?: boolean;
+    shorthand?: boolean;
+    source_map?: SourceMapOptions;
+    webkit?: boolean;
+    width?: number;
+    wrap_iife?: boolean;
+    wrap_func_args?: boolean;
+}
+
+export enum OutputQuoteStyle {
+    PreferDouble = 0,
+    AlwaysSingle = 1,
+    AlwaysDouble = 2,
+    AlwaysOriginal = 3
+}
+
+export interface MinifyOptions {
+    compress?: boolean | CompressOptions;
+    ecma?: ECMA;
+    enclose?: boolean | string;
+    ie8?: boolean;
+    keep_classnames?: boolean | RegExp;
+    keep_fnames?: boolean | RegExp;
+    mangle?: boolean | MangleOptions;
+    module?: boolean;
+    nameCache?: object;
+    format?: FormatOptions;
+    /** @deprecated */
+    output?: FormatOptions;
+    parse?: ParseOptions;
+    safari10?: boolean;
+    sourceMap?: boolean | SourceMapOptions;
+    toplevel?: boolean;
+}
+
+export interface MinifyOutput {
+    code?: string;
+    map?: EncodedSourceMap | string;
+    decoded_map?: DecodedSourceMap | null;
+}
+
+export interface SourceMapOptions {
+    /** Source map object, 'inline' or source map file content */
+    content?: SectionedSourceMapInput | string;
+    includeSources?: boolean;
+    filename?: string;
+    root?: string;
+    asObject?: boolean;
+    url?: string | 'inline';
+}
+
+export function minify(files: string | string[] | { [file: string]: string }, options?: MinifyOptions): Promise<MinifyOutput>;
+export function minify_sync(files: string | string[] | { [file: string]: string }, options?: MinifyOptions): MinifyOutput;