webpack-plugin-corejs

A webpack plugin for injecting core-js polyfills based on your browserslist configuration.

This plugin is essentially a wrapper for core-js-builder for webpack.

One usecase is that you are not using babel, but esbuild for transpiling, e.g. using the ESBuildMinifyPlugin with your supported browsers is much faster then using Babel, but it only transpiles the syntax and does not add any polyfills. So you would need to add e.g. core-js polyfills manually... or... use this plugin.

Compatibility

This version should work with webpack 4 as well as with webpack 5.

Getting started

🚀 Installation

npm i -D webpack-plugin-corejs

🔧 Configuration

In your webpack.config.js:

const CoreJSPlugin = require('webpack-plugin-corejs')

module.exports = {
  //...
  plugins: [
    new CoreJSPlugin({
        // Options
    }),
    // ...
  ]
  // ...
}

Or in your webpack.config.mjs:

import { CoreJSPlugin } from 'webpack-plugin-corejs'

export default {
  //...
  plugins: [
    new CoreJSPlugin({
        // Options
    }),
    // ...
  ]
  // ...
}

🛠️ Options

All options are optionally, if no options are given the default is to use { modules: 'core-js/es' }.

You can omit setting targets in this case browserslist is used (package.json or .browserslistrc).

{
  /** CoreJS modules to use, defaults to 'core-js/es' */
  modules?: string | readonly string[] | readonly RegExp[],
  /** CoreJS modules to exclude */
  exclude?: string | readonly string[] | readonly RegExp[],
  /** Overide browserslist targets */
  targets?: string | readonly string[] | Record<string, string | readonly string[]>
  /** Add comment which modules are used within bundle */
  summary?: {
    size: boolean
    modules: boolean
  }
}

Changelog

See CHANGELOG

License

EUPL-1.2