webpack.config.js

const webpack = require('webpack')
const path = require('path')
const paths = require('./gulpfile.js/paths')

const isProd = process.env.NODE_ENV === 'production'
const plugins = []
const entry = ['babel-polyfill', paths.js.entry] // babel-polyfill for async/await

if (isProd) {
  plugins.push(
    new webpack.DefinePlugin({
      'process.env': { NODE_ENV: JSON.stringify('production') }
    }),
    new webpack.optimize.UglifyJsPlugin({
      compress: { warnings: false }
    })
  )
} else {
  entry.push('webpack-hot-middleware/client?reload=true')
  plugins.push(new webpack.HotModuleReplacementPlugin())
}

module.exports = {
  devtool: isProd ? false : '#eval-source-map',
  quiet: false,
  stats: {
    assets: true,
    colors: true,
    version: false,
    hash: false,
    timings: false,
    chunks: false,
    chunkModules: false
  },
  entry,
  output: {
    path: path.join(__dirname, paths.js.output),
    publicPath: '/js/',
    filename: 'bundle.js'
  },
  plugins,
  modules: [
    path.join(__dirname, 'app'),
    'node_modules'
  ],

  extensions: ['.js'],

  module: {
    rules: [{
      test: /\.js$/,
      use: [{
        loader: 'babel-loader',
        options: {
          presets: [
            ['es2015', { modules: false }]
          ]
        }
      }]
    }]
  }
}