webpack.config.js

const path = require('path');

module.exports = {
  entry: './src/index.js',
  // devtool: 'cheap-module-eval-source-map',
  devtool: 'inline-source-map',
  devServer: {
    contentBase: './dist',
    headers: {
        'Access-Control-Allow-Origin': '*'
    },
  },
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist'),
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          'style-loader',
          'css-loader',
        ],
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: [
          'file-loader',
        ],
      },
      { // see https://github.com/coryhouse/react-slingshot/issues/128#issuecomment-216363426
          test: /\.ico$|\.woff$|\.ttf$|\.wav$|\.mp3$/,
          loader: 'file-loader?name=[name].[ext]'  // <-- retain original file name
      },
      {
        test: /\.js$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env'],
            plugins: ['@babel/plugin-proposal-object-rest-spread']
          },
        },
      },
    ],
  },
  node: {
    fs: 'empty',
    net: 'empty',
    tls: 'empty',
  },
};