Index: frontend/node_modules/regjsparser/parser.d.ts
===================================================================
--- frontend/node_modules/regjsparser/parser.d.ts	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/regjsparser/parser.d.ts	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,182 @@
+type _If<Test, Then, Else> = Test extends true ? Then : Else;
+
+export type Features = {
+  lookbehind?: boolean;
+  namedGroups?: boolean;
+  unicodePropertyEscape?: boolean;
+  unicodeSet?: boolean;
+  modifiers?: boolean;
+};
+
+export type AstNodeType =
+  | "alternative"
+  | "anchor"
+  | "characterClass"
+  | "characterClassEscape"
+  | "characterClassRange"
+  | "disjunction"
+  | "dot"
+  | "group"
+  | "quantifier"
+  | "reference"
+  | "unicodePropertyEscape"
+  | "value";
+
+export type Base<T extends AstNodeType> = {
+  range: [number, number];
+  raw: string;
+  type: T;
+};
+
+export type AstNode<F extends Features = {}> =
+  | Alternative<F>
+  | Anchor
+  | CharacterClass<F>
+  | CharacterClassEscape
+  | CharacterClassRange
+  | Disjunction<F>
+  | Dot
+  | Group<F>
+  | Quantifier<F>
+  | Reference<F>
+  | _If<F["unicodePropertyEscape"], UnicodePropertyEscape, never>
+  | Value;
+
+export type RootNode<F extends Features = {}> = Exclude<
+  AstNode<F>,
+  CharacterClassRange
+>;
+
+export type Anchor = Base<"anchor"> & {
+  kind: "boundary" | "end" | "not-boundary" | "start";
+};
+
+export type CharacterClassEscape = Base<"characterClassEscape"> & {
+  value: 'd' | 'D' | 'w' | 'W' | 's' | 'S';
+};
+
+export type Value = Base<"value"> & {
+  codePoint: number;
+  kind:
+    | "controlLetter"
+    | "hexadecimalEscape"
+    | "identifier"
+    | "null"
+    | "octal"
+    | "singleEscape"
+    | "symbol"
+    | "unicodeCodePointEscape"
+    | "unicodeEscape";
+};
+
+export type Identifier = Base<"value"> & {
+  value: string;
+};
+
+export type Alternative<F extends Features = {}> = Base<"alternative"> & {
+  body: RootNode<F>[];
+};
+
+export type CharacterClassRange = Base<"characterClassRange"> & {
+  max: Value;
+  min: Value;
+};
+
+export type UnicodePropertyEscape = Base<"unicodePropertyEscape"> & {
+  negative: boolean;
+  value: string;
+};
+
+export type CharacterClassBody =
+  | CharacterClassEscape
+  | CharacterClassRange
+  | UnicodePropertyEscape
+  | Value;
+
+export type CharacterClass<F extends Features = {}> = Base<"characterClass"> & {
+  body: CharacterClassBody[];
+  negative: boolean;
+  kind: "union" | _If<F["unicodeSet"], "intersection" | "subtraction", never>;
+};
+
+export type ModifierFlags = {
+  enabling: string;
+  disabling: string;
+};
+
+export type NonCapturingGroup<F extends Features = {}> = Base<"group"> &
+  (
+    | {
+        behavior:
+          | "lookahead"
+          | "lookbehind"
+          | "negativeLookahead"
+          | "negativeLookbehind";
+        body: RootNode<F>[];
+      }
+    | ({
+        behavior: "ignore";
+        body: RootNode<F>[];
+      } & _If<
+        F["modifiers"],
+        {
+          modifierFlags?: ModifierFlags;
+        },
+        {
+          modifierFlags: undefined;
+        }
+      >)
+  );
+
+export type CapturingGroup<F extends Features = {}> = Base<"group"> & {
+  behavior: "normal";
+  body: RootNode<F>[];
+} & _If<
+    F["namedGroups"],
+    {
+      name?: Identifier;
+    },
+    {
+      name: undefined;
+    }
+  >;
+
+export type Group<F extends Features = {}> =
+  | CapturingGroup<F>
+  | NonCapturingGroup<F>;
+
+export type Quantifier<F extends Features = {}> = Base<"quantifier"> & {
+  body: [RootNode<F>];
+  greedy: boolean;
+  max?: number;
+  min: number;
+  symbol?: "?" | "*" | "+";
+};
+
+export type Disjunction<F extends Features = {}> = Base<"disjunction"> & {
+  body: [RootNode<F>, RootNode<F>, ...RootNode<F>[]];
+};
+
+export type Dot = Base<"dot">;
+
+export type NamedReference = Base<"reference"> & {
+  matchIndex: undefined;
+  name: Identifier;
+};
+
+export type IndexReference = Base<"reference"> & {
+  matchIndex: number;
+  name: undefined;
+};
+
+export type Reference<F extends Features = {}> = _If<
+  F["namedGroups"],
+  IndexReference | NamedReference,
+  IndexReference
+>;
+
+export function parse<F extends Features = {}>(
+  str: string,
+  flags: string,
+  features?: F
+): RootNode<F>;