webpack.prod.js

const path = require('path');
const merge = require('webpack-merge');
const common = require('./webpack.common.js');
const webpack = require('webpack');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = merge(common, {
  output: {
    filename: '[chunkhash].bundle.js',
    path: path.resolve(__dirname, 'dist')
  },
  module: {
    rules: [{
      test: /\.css$/,
      loader: ExtractTextPlugin.extract({fallback: 'style-loader', use : 'css-loader?sourceMap&localIdentName=[local]___[hash:base64:5]'}),
      exclude: ['node_modules']
    }]
  },
  plugins: [
    new webpack.optimize.UglifyJsPlugin({
      sourceMap: true,
      compress: {
        warnings: false,
        screw_ie8: true,
        drop_console: true,
        drop_debugger: true
      }
    }),
    new ExtractTextPlugin({
      filename: 'style.css',
      allChunks: true
    }),
    new HtmlWebpackPlugin({
      template: './src/template.html',
      files: {
        css: ['style.css'],
        js: ['bundle.js'],
      }
    }),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('production')
    })
  ]
});