Registry / serialization / babel-plugin-transform-modern-regexp

babel-plugin-transform-modern-regexp

library0.0.6jsnpmunverified

Babel plugin that transpiles modern RegExp features (dotAll s-flag, named capturing groups, extended x-flag) down to ES5-compatible JavaScript. Current stable version is 0.0.6, last updated in 2019. This plugin has low maintenance cadence and is based on the regexp-tree library. It is a non-standard package, not affiliated with Babel core, and mostly useful for projects that need to support older JavaScript engines without native support for these features.

serialization

npm install babel-plugin-transform-modern-regexp

github ↗package ↗

INSTALL

IMPORT

SIG · BABEL-PLUGIN-TRANS

babel-plugin-transform-modern-regexp

serializationjavascriptv0.0.6

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

default

✓ module.exports = require('babel-plugin-transform-modern-regexp'); // or in .babelrc plugins array

✗ import plugin from 'babel-plugin-transform-modern-regexp'; // Not a typical ES module

This is a CommonJS module typically used as a Babel plugin string, not imported directly.

N/A

✓

No direct named exports. Used via Babel configuration as 'transform-modern-regexp'.

Shows Babel configuration enabling dotAll and named groups features, and a sample transformation.

// .babelrc { "plugins": [ ["transform-modern-regexp", { "features": ["dotAll", "namedCapturingGroups", "xFlag"] }] ] } // Input const regex = /(?<name>\w+)\k<name>/s; // Output const regex = /([\0-\uFFFF])\1/;

Debug

Known issues

deprecatedPackage is unmaintained since 2019 and does not support modern Babel versions (7.x+).

fix

Use native RegExp features or a more actively maintained plugin like @babel/plugin-proposal-unicode-property-regex.

affects: >0.0.6

gotchaRequires regexp-tree package as a direct dependency but is not included in the plugin's package.json dependencies list (it's a peer dependency).

fix

Manually install regexp-tree: npm install regexp-tree --save-dev.

affects: 0.0.6

gotchaThe xFlag feature transforms extended regexes but only works with new RegExp() calls, not regex literals.

fix

Use new RegExp(pattern, 'x') syntax for extended flag.

affects: >=0

gotchaPlugin options are passed as an array item, not as a separate object in .babelrc plugins array.

fix

Use ["transform-modern-regexp", { ... }] structure.

affects: >=0

Errors

Common errors & fixes

Error: Plugin transform-modern-regexp: Unknown plugin "transform-modern-regexp"

Babel >=7 does not find the plugin in node_modules or it's not installed.

fix

Install the plugin: npm install babel-plugin-transform-modern-regexp --save-dev

TypeError: Cannot read property 'features' of undefined

Plugin options are malformed; missing plugin object.

fix

Use correct format in .babelrc: ["transform-modern-regexp", { "features": [...] }]

Error: Cannot find module 'regexp-tree'

regexp-tree is a peer dependency of the plugin but not automatically installed.

fix

Run: npm install regexp-tree --save-dev

Upgrade

Version history

0.0.6latest on npm

Audit

Dependencies

regexp-treerequiredCore library for regex parsing and transformation

Agent activity

17 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/DmitrySoshnikov/babel-plugin-transform-modern-regexp ↗

packagehttps://www.npmjs.com/package/babel-plugin-transform-modern-regexp ↗