webpack.dev.config.js

const webpack = require('webpack');
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const { spawn } = require('child_process');

// Config directories
const SRC_DIR = path.resolve(__dirname, 'src');
const OUTPUT_DIR = path.resolve(__dirname, 'dist');

// Any directories you will be adding code/files into, need to be added to this array so webpack will pick them up
const defaultInclude = [SRC_DIR];

module.exports = {
  entry: SRC_DIR + '/index.js',
  output: {
    path: OUTPUT_DIR,
    publicPath: '/',
    filename: 'bundle.js'
  },
  module: {
    loaders: [
      { test: /\.js$/, loader: 'babel-loader', exclude: /node_modules/ },
      { test: /\.jsx$/, loader: 'babel-loader', exclude: /node_modules/ },
      { test: /\.css$/, loader: 'style-loader!css-loader?modules=true&localIdentName=[name]__[local]___[hash:base64:5]', include: /flexboxgrid/ },
      { test: /\.scss/, loader: 'style-loader!css-loader!sass-loader' },
      {
          test: /\.jpe?g$|\.ico$|\.gif$|\.png$|\.svg$|\.woff$|\.ttf$|\.wav$|\.mp3$/,
          loader: 'file-loader?name=[name].[ext]'  // <-- retain original file name
      }
    ]
  },
  target: 'electron-renderer',
  plugins: [
    new HtmlWebpackPlugin({      
      template: './src/index.html',      
      filename: 'index.html',
      inject: 'body'
    }),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('development')
    })
  ],
  devtool: 'cheap-source-map',
  devServer: {
    contentBase: OUTPUT_DIR,
    stats: {
      colors: true,
      chunks: false,
      children: false
    },
    setup() {
      spawn(
        'electron',
        ['.'],
        { shell: true, env: process.env, stdio: 'inherit' }
      )
      .on('close', code => process.exit(0))
      .on('error', spawnError => console.error(spawnError));
    }
  }
};