@babel/helper-create-regexp-features-plugin

What is @babel/helper-create-regexp-features-plugin?

The @babel/helper-create-regexp-features-plugin is a helper plugin used internally by Babel's transform plugins to compile regular expressions using the RegExp features provided in ECMAScript 2015+ into equivalent regular expressions that are compatible with older JavaScript engines. This plugin is not typically used directly by developers but is instead used by other Babel plugins to handle regular expression transformations.

What are @babel/helper-create-regexp-features-plugin's main functionalities?

Transform RegExp Literals

This feature allows Babel plugins to transform RegExp literals using new syntax features into a form that can be understood by older JavaScript engines.

This is an internal helper plugin and does not provide a public API for direct usage in code. It is used by other Babel plugins to transform RegExp literals.

Support for RegExp Proposals

This feature enables Babel plugins to add support for proposed RegExp features that are not yet part of the ECMAScript standard.

This is an internal helper plugin and does not provide a public API for direct usage in code. It is used by other Babel plugins to add support for RegExp proposals.

Other packages similar to @babel/helper-create-regexp-features-plugin

regexpu-core

The regexpu-core package is a RegExp utility library that transforms Unicode-aware regular expressions into ES5-compatible versions. This is similar to @babel/helper-create-regexp-features-plugin in that it also deals with transforming regular expressions for compatibility purposes.

README

@babel/helper-create-regexp-features-plugin

Compile ESNext Regular Expressions to ES5

See our website @babel/helper-create-regexp-features-plugin for more information.

Install

Using npm:

npm install --save @babel/helper-create-regexp-features-plugin

or using yarn:

yarn add @babel/helper-create-regexp-features-plugin

Changelog

v7.27.0 (2025-03-24)

:eyeglasses: Spec Compliance

• babel-generator, babel-parser
  • #16977 Default importAttributesKeyword to with (@JLHwung)

:rocket: New Feature

• babel-helper-create-class-features-plugin, babel-traverse, babel-types
  • #17169 Allow traverseFast to exit early (@liuxingbaoyu)
• babel-parser, babel-types
  • #17110 Add ImportAttributes to Standardized and move its parser test fixtures (@JLHwung)
• babel-generator
  • #17100 fix(babel-generator): add named export of generate function (@vovkasm)
• babel-parser, babel-template
  • #17149 Add allowYieldOutsideFunction to parser (@liuxingbaoyu)
• babel-plugin-transform-typescript, babel-traverse
  • #17102 feat: Add upToScope parameter to hasBinding (@liuxingbaoyu)
• babel-parser
  • #17082 Support ESTree AccessorProperty (@JLHwung)
• babel-types
  • #17162 feat(babel-types): Add support for BigInt literal conversion in valueToNode (@ishchhabra)

:bug: Bug Fix

• babel-helper-create-class-features-plugin, babel-plugin-transform-class-properties
  • #16816 fix: Class reference in type throws error (@liuxingbaoyu)
• babel-traverse
  • #17170 fix: Reset child scopes when scope.crawl() (@liuxingbaoyu)
• babel-helpers, babel-preset-typescript, babel-runtime-corejs2, babel-runtime-corejs3, babel-runtime
  • #17118 Fix: align behaviour to tsc rewriteRelativeImportExtensions (@JLHwung)
• babel-cli
  • #17182 fix: @babel/cli generates duplicate inline source maps (@liuxingbaoyu)
• babel-plugin-transform-named-capturing-groups-regex, babel-types
  • #17175 Generate computed proto key (@JLHwung)

:running_woman: Performance

• babel-types
  • #16870 perf: Improve builders of @babel/types (@liuxingbaoyu)
• babel-helper-create-regexp-features-plugin
  • #17176 fix: improve duplicate named groups check (@JLHwung)