Last change
on this file since 6fe77af was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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100644
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File size:
1.1 KB
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[6a3a178] | 1 | /*
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| 2 | MIT License http://www.opensource.org/licenses/mit-license.php
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| 3 | */
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| 4 |
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| 5 | "use strict";
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| 6 |
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| 7 | const RuntimeGlobals = require("../RuntimeGlobals");
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| 8 | const RuntimeModule = require("../RuntimeModule");
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| 9 | const Template = require("../Template");
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| 10 |
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| 11 | class GlobalRuntimeModule extends RuntimeModule {
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| 12 | constructor() {
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| 13 | super("global");
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| 14 | }
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| 15 |
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| 16 | /**
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| 17 | * @returns {string} runtime code
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| 18 | */
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| 19 | generate() {
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| 20 | return Template.asString([
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| 21 | `${RuntimeGlobals.global} = (function() {`,
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| 22 | Template.indent([
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| 23 | "if (typeof globalThis === 'object') return globalThis;",
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| 24 | "try {",
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| 25 | Template.indent(
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| 26 | // This works in non-strict mode
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| 27 | // or
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| 28 | // This works if eval is allowed (see CSP)
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| 29 | "return this || new Function('return this')();"
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| 30 | ),
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| 31 | "} catch (e) {",
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| 32 | Template.indent(
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| 33 | // This works if the window reference is available
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| 34 | "if (typeof window === 'object') return window;"
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| 35 | ),
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| 36 | "}"
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| 37 | // It can still be `undefined`, but nothing to do about it...
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| 38 | // We return `undefined`, instead of nothing here, so it's
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| 39 | // easier to handle this case:
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| 40 | // if (!global) { … }
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| 41 | ]),
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| 42 | "})();"
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| 43 | ]);
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| 44 | }
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| 45 | }
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| 46 |
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| 47 | module.exports = GlobalRuntimeModule;
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