webpack.dev.config.js

const webpack = require('webpack');
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const { spawn } = require('child_process');
const MonacoWebpackPlugin = require('monaco-editor-webpack-plugin');
const APP_DIR = path.resolve(__dirname, './src');
const MONACO_DIR = path.resolve(__dirname, './node_modules/monaco-editor');

// Any directories you will be adding code/files into, need to be added to this array so webpack will pick them up
const defaultInclude = path.resolve(__dirname, 'src');

module.exports = {
  module: {
    rules: [
      {
        test: /\.css$/,
        // include: APP_DIR,
        exclude: /node_modules/,
        use: [{ loader: 'style-loader' }, { loader: 'css-loader' }, { loader: 'postcss-loader' }],
        include: defaultInclude,
      },
      {
        test: /\.(jsx|js)$/,
        exclude: /node_modules/,
        use: [{ loader: 'babel-loader', options: { presets: ['@babel/preset-env', '@babel/preset-react'] } }],
        include: defaultInclude,
      },
      {
        test: /\.(jpe?g|png|gif)$/,
        exclude: /node_modules/,
        use: [{ loader: 'file-loader?name=img/[name]__[hash:base64:5].[ext]' }],
        include: defaultInclude,
      },
      {
        test: /\.(eot|svg|ttf|woff|woff2)$/,
        exclude: /node_modules/,
        use: [{ loader: 'file-loader?name=font/[name]__[hash:base64:5].[ext]' }],
        include: defaultInclude,
      },
      {
        test: /\.css$/,
        include: MONACO_DIR,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /\.node$/,
        use: ['node-loader'],
      },
    ],
  },
  target: 'electron-renderer',
  plugins: [
    new HtmlWebpackPlugin({
      title: 'fflow',
      // template: 'public/index.html'
    }),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('development'),
    }),
    new MonacoWebpackPlugin(),
  ],
  resolve: {
    extensions: ['.js', '.jsx'],
  },
  devtool: 'cheap-source-map',
  devServer: {
    contentBase: path.resolve(__dirname, 'dist'),
    stats: {
      colors: true,
      chunks: false,
      children: false,
    },
    before() {
      spawn('electron', ['.'], { shell: true, env: process.env, stdio: 'inherit' })
        .on('close', (code) => process.exit(0))
        .on('error', (spawnError) => console.error(spawnError));
    },
  },
};