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@eslint-community/regexpp (4.12.1)

Published 2026-02-24 13:49:20 +00:00 by atheaadmin

Installation

Setup this registry in your project .npmrc file:

@eslint-community:registry=

To install the package using npm, run the following command:

npm install @eslint-community/regexpp@4.12.1

or add it to the package.json file:

"@eslint-community/regexpp": "4.12.1"

For more information on the npm registry, see the documentation.

About this package

@eslint-community/regexpp

A regular expression parser for ECMAScript.

💿 Installation

$ npm install @eslint-community/regexpp

• require Node@^12.0.0 || ^14.0.0 || >=16.0.0.

📖 Usage

import {
    AST,
    RegExpParser,
    RegExpValidator,
    RegExpVisitor,
    parseRegExpLiteral,
    validateRegExpLiteral,
    visitRegExpAST
} from "@eslint-community/regexpp"

parseRegExpLiteral(source, options?)

Parse a given regular expression literal then make AST object.

This is equivalent to new RegExpParser(options).parseLiteral(source).

• Parameters:
  • source (string | RegExp) The source code to parse.
  • options? (RegExpParser.Options) The options to parse.
• Return:
  • The AST of the regular expression.

validateRegExpLiteral(source, options?)

Validate a given regular expression literal.

This is equivalent to new RegExpValidator(options).validateLiteral(source).

• Parameters:
  • source (string) The source code to validate.
  • options? (RegExpValidator.Options) The options to validate.

visitRegExpAST(ast, handlers)

Visit each node of a given AST.

This is equivalent to new RegExpVisitor(handlers).visit(ast).

• Parameters:
  • ast (AST.Node) The AST to visit.
  • handlers (RegExpVisitor.Handlers) The callbacks.

RegExpParser

new RegExpParser(options?)

• Parameters:
  • options? (RegExpParser.Options) The options to parse.

parser.parseLiteral(source, start?, end?)

Parse a regular expression literal.

• Parameters:
  • source (string) The source code to parse. E.g. "/abc/g".
  • start? (number) The start index in the source code. Default is 0.
  • end? (number) The end index in the source code. Default is source.length.
• Return:
  • The AST of the regular expression.

parser.parsePattern(source, start?, end?, flags?)

Parse a regular expression pattern.

• Parameters:
  • source (string) The source code to parse. E.g. "abc".
  • start? (number) The start index in the source code. Default is 0.
  • end? (number) The end index in the source code. Default is source.length.
  • flags? ({ unicode?: boolean, unicodeSets?: boolean }) The flags to enable Unicode mode, and Unicode Set mode.
• Return:
  • The AST of the regular expression pattern.

parser.parseFlags(source, start?, end?)

Parse a regular expression flags.

• Parameters:
  • source (string) The source code to parse. E.g. "gim".
  • start? (number) The start index in the source code. Default is 0.
  • end? (number) The end index in the source code. Default is source.length.
• Return:
  • The AST of the regular expression flags.

RegExpValidator

new RegExpValidator(options)

• Parameters:
  • options (RegExpValidator.Options) The options to validate.

validator.validateLiteral(source, start, end)

Validate a regular expression literal.

• Parameters:
  • source (string) The source code to validate.
  • start? (number) The start index in the source code. Default is 0.
  • end? (number) The end index in the source code. Default is source.length.

validator.validatePattern(source, start, end, flags)

Validate a regular expression pattern.

• Parameters:
  • source (string) The source code to validate.
  • start? (number) The start index in the source code. Default is 0.
  • end? (number) The end index in the source code. Default is source.length.
  • flags? ({ unicode?: boolean, unicodeSets?: boolean }) The flags to enable Unicode mode, and Unicode Set mode.

validator.validateFlags(source, start, end)

Validate a regular expression flags.

• Parameters:
  • source (string) The source code to validate.
  • start? (number) The start index in the source code. Default is 0.
  • end? (number) The end index in the source code. Default is source.length.

RegExpVisitor

new RegExpVisitor(handlers)

• Parameters:
  • handlers (RegExpVisitor.Handlers) The callbacks.

visitor.visit(ast)

Validate a regular expression literal.

• Parameters:
  • ast (AST.Node) The AST to visit.

📰 Changelog

• GitHub Releases

🍻 Contributing

Welcome contributing!

Please use GitHub's Issues/PRs.

Development Tools

• npm test runs tests and measures coverage.
• npm run build compiles TypeScript source code to index.js, index.js.map, and index.d.ts.
• npm run clean removes the temporary files which are created by npm test and npm run build.
• npm run lint runs ESLint.
• npm run update:test updates test fixtures.
• npm run update:ids updates src/unicode/ids.ts.
• npm run watch runs tests with --watch option.

Dependencies

Development Dependencies

ID	Version
@eslint-community/eslint-plugin-mysticatea	^15.5.1
@rollup/plugin-node-resolve	^14.1.0
@types/eslint	^8.44.3
@types/jsdom	^16.2.15
@types/mocha	^9.1.1
@types/node	^12.20.55
dts-bundle	^0.7.3
eslint	^8.50.0
js-tokens	^8.0.2
jsdom	^19.0.0
mocha	^9.2.2
npm-run-all2	^6.2.2
nyc	^14.1.1
rimraf	^3.0.2
rollup	^2.79.1
rollup-plugin-sourcemaps	^0.6.3
ts-node	^10.9.1
typescript	~5.0.2

Keywords

regexp regular expression parser validator ast abstract syntax tree ecmascript es2015 es2016 es2017 es2018 es2019 es2020 es2021 annexB

Details

npm

2026-02-24 13:49:20 +00:00

0

Toru Nagashima

Project Site

MIT

latest

72 KiB

Assets (1)

regexpp-4.12.1.tgz 72 KiB

Versions (1) View all

4.12.1 2026-02-24