A ESLint plugin for webpack

Usage no npm install needed!

<script type="module">
  import eslintWebpackPlugin from '';


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This plugin uses eslint to find and fix problems in your JavaScript code

Getting Started

To begin, you'll need to install eslint-webpack-plugin:

npm install eslint-webpack-plugin --save-dev

Note: You also need to install eslint >= 7 from npm, if you haven't already:

npm install eslint --save-dev

Then add the plugin to your webpack config. For example:

const ESLintPlugin = require('eslint-webpack-plugin');

module.exports = {
  // ...
  plugins: [new ESLintPlugin(options)],
  // ...


You can pass eslint options.

Note that the config option you provide will be passed to the ESLint class. This is a different set of options than what you'd specify in package.json or .eslintrc. See the eslint docs for more details.

Warning: In eslint-webpack-plugin version 1 the options were passed to the now deprecated CLIEngine.


  • Type: String
  • Default: compiler.context

A string indicating the root of your files.


  • Type: String
  • Default: eslint

Path to eslint instance that will be used for linting. If the eslintPath is a folder like a official eslint, or specify a formatter option. now you dont have to install eslint.


  • Type: String|Array[String]
  • Default: 'js'

Specify extensions that should be checked.


  • Type: String|Array[String]
  • Default: 'node_modules'

Specify the files and/or directories to exclude. Must be relative to options.context.


  • Type: String|Array[String]
  • Default: null

Specify directories, files, or globs. Must be relative to options.context. Directories are traveresed recursively looking for files matching options.extensions. File and glob patterns ignore options.extensions.


  • Type: Boolean
  • Default: false

Will enable ESLint autofix feature.

Be careful: this option will change source files.


  • Type: String|Function
  • Default: 'stylish'

Accepts a function that will have one argument: an array of eslint messages (object). The function must return the output as a string. You can use official eslint formatters.


  • Type: Boolean
  • Default: false

Lint only changed files, skip lint on start.


  • Type: Boolean | Number
  • Default: false

Will run lint tasks across a thread pool. The pool size is automatic unless you specify a number.

Errors and Warning

By default the plugin will auto adjust error reporting depending on eslint errors/warnings counts. You can still force this behavior by using emitError or emitWarning options:


  • Type: Boolean
  • Default: true

The errors found will always be emitted, to disable set to false.


  • Type: Boolean
  • Default: true

The warnings found will always be emitted, to disable set to false.


  • Type: Boolean
  • Default: true

Will cause the module build to fail if there are any errors, to disable set to false.


  • Type: Boolean
  • Default: false

Will cause the module build to fail if there are any warnings, if set to true.


  • Type: Boolean
  • Default: false

Will process and report errors only and ignore warnings, if set to true.


  • Type: Boolean|Object
  • Default: false

Write the output of the errors to a file, for example a checkstyle xml file for use for reporting on Jenkins CI.

The filePath is an absolute path or relative to the webpack config: output.path. You can pass in a different formatter for the output file, if none is passed in the default/configured formatter will be used.