webpack.config.js

const path = require('path');
const TerserPlugin = require('terser-webpack-plugin');
const CopyPlugin = require('copy-webpack-plugin');

module.exports = {
  mode: 'development',
  entry: ['babel-polyfill', './src/app.js'],
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'clempire.bundle.js'
  },
  // devtool: 'source-map',
  devtool: false,
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: [/node_modules/, '/clempire.bundle.*'],
        use: {
          loader: 'babel-loader'
        }
      }
    ]
  },

  devServer: {
    contentBase: path.resolve(__dirname, 'dist'),
    writeToDisk: true,
    open: true
  },

  plugins: [
    new CopyPlugin({
      patterns: [
        {
          from: 'index.html'
        },
        {
          from: 'overlay.js'
        },
        {
          from: 'soundWorker.js'
        },
        {
          from: 'assets/**/*'
        }
      ]
    })
  ],

  optimization: {
    minimize: true,
    minimizer: [
      new TerserPlugin({
        terserOptions: {
          output: {
            comments: false
          }
        },
        extractComments: false
      })
    ]
  }
};