Registry / testing / eslint-plugin-regexp

eslint-plugin-regexp

library3.1.0jsnpmunverified

ESLint plugin for finding RegExp mistakes and enforcing style guide violations. Current stable version is v3.1.0 (requires ESLint >=9.38.0 and Node.js >=20.19.0). Released regularly with minor and patch updates. Key differentiators: 80+ rules covering regex syntax, optimization, and style; TypeScript type declarations included; supports ES2025 features like duplicate named capturing groups; provides recommended and all configs; exclusively supports ESLint Flat Config since v3.0.0 (drops Legacy Config).

testing

npm install eslint-plugin-regexp

github ↗package ↗

INSTALL

IMPORT

SIG · ESLINT-PLUGIN-REGE

eslint-plugin-regexp

testingjavascriptv3.1.0

Install

—

Import

—

Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

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

regexpPlugin (default)

✓ import regexpPlugin from 'eslint-plugin-regexp'

✗ const regexpPlugin = require('eslint-plugin-regexp')

ESM-only since v3.0.0; default export named 'regexp' but can be imported with any name.

configs (recommended)

✓ regexpPlugin.configs.recommended

✗ require('eslint-plugin-regexp').configs.recommended

Use within flat config array. Legacy .eslintrc configs dropped in v3.

rules

✓ plugins: { regexp: regexpPlugin }, rules: { 'regexp/no-useless-escape': 'error' }

✗ rules: { 'regexp/no-useless-escape': 'error' } without plugins

Plugin must be registered under 'plugins' key in flat config before using rules.

Setup ESLint flat config with recommended regexp rules and custom overrides.

// eslint.config.js import regexpPlugin from 'eslint-plugin-regexp'; export default [ regexpPlugin.configs.recommended, { rules: { 'regexp/prefer-regexp-exec': 'warn', 'regexp/no-useless-escape': 'error', }, }, ];

Debug

Known issues

breakingv3.0.0: Dropped support for ESLint v8 and Legacy Config (.eslintrc). Only Flat Config (eslint.config.js) is supported.

fix

Migrate to ESLint v9 and use eslint.config.js with import statement.

affects: >=3.0.0

gotchaThe 'all' config changes with every minor/major version. Not suitable for production.

fix

Use 'recommended' config for stable rule set.

affects: >=2.0.0

deprecatedv2.10.0: Deprecated old rule 'regexp/...' without explicit notice.

fix

Update to v3 and follow flat config patterns.

affects: >=2.10.0 <3.0.0

gotchaRule names must be prefixed with 'regexp/' in config, e.g., 'regexp/no-useless-escape'.

fix

Use full rule name including prefix.

affects: >=1.0.0

breakingv3.0.0: Minimum Node.js version bumped to 20.19.0, 22.13.0, or >=24.

fix

Update Node.js to supported version.

affects: >=3.0.0

Errors

Common errors & fixes

Error: Cannot find module 'eslint-plugin-regexp'

Package not installed or incorrect import path.

fix

Run 'npm install --save-dev eslint-plugin-regexp' and ensure import path is correct.

Configuration for rule "regexp/..." is invalid: Value "error" is unexpected.

Rule name missing 'regexp/' prefix.

fix

Use full rule name like 'regexp/no-useless-escape'.

ESLint couldn't find the plugin "eslint-plugin-regexp".

Plugin not registered in flat config 'plugins' array.

fix

Add 'plugins: { regexp: regexpPlugin }' to your config object.

Upgrade

Version history

3.1.0latest on npm

Audit

Dependencies

eslintrequiredpeer dependency required for plugin to function

Agent activity

2 hits · last 30 days

node

Resources

githubhttps://github.com/ota-meshi/eslint-plugin-regexp ↗

packagehttps://www.npmjs.com/package/eslint-plugin-regexp ↗