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Extending as a Library

One of the great benefits of using electron-webpack is that the entirity of webpack‘s documentation still applies. You can easily skip using the provided CLI and modify the configurations to meet your needs. Since electron uses a multi-process architecture, there are also multiple webpack configurations. Let’s cover what’s provided.

Configuration Files

  • electron-webpack/webpack.main.config.js (main process)
  • electron-webpack/webpack.renderer.config.js (renderer process)
  • electron-webpack/webpack.renderer.dll.config.js (Dll bundle spliting)

If you are wanting to look at these configurations internally, you can easily do the following to print them into your console. Notice that each configuration returns a Promise.

const webpackMain = require('electron-webpack/webpack.main.config.js')
const { inspect } = require('util')

webpackMain().then(config => {
  console.log(inspect(config, {
    showHidden: false,
    depth: null,
    colors: true

Adding a Custom Loader/Plugin

Let’s say we need to support *.txt files in our renderer process and want to use the raw-loader to do so, here’s how we can get that setup.

Install raw-loader
yarn add -D raw-loader
const webpackRenderer = require('electron-webpack/webpack.renderer.config.js')

module.exports = env => {
  return new Promise((resolve, reject) => {

    /* get provided config */
    webpackRenderer(env).then(rendererConfig => {

      /* add `raw-loader` */
        test: /\.txt$/,
        use: 'raw-loader'

      /* return modified config to webpack */

Now with your new custom webpack configuration file, you can use the native webpack CLI.

webpack --config myCustomWebpack.renderer.config.js