webpack.config.prod.js

const webpack = require('webpack');
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const autoprefixer = require('autoprefixer');

const config = require('./config');

module.exports = {
  devtool: 'source-map',
  entry: ['babel-polyfill', './src/index'],
  output: {
    path: path.resolve(__dirname, './dist'),
    filename: 'bundle.js',
    publicPath: config.production.basename,
  },
  resolve: {
    extensions: ['.js', '.jsx'],
  },
  module: {
    rules: [
      { test: /\.jsx?$/, exclude: /node_modules/, loader: 'babel-loader' },
      {
        test: /\.scss$/,
        exclude: /node_modules/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: [{
            loader: 'css-loader',
            options: {
              modules: true,
              localIdentName: '[name]__[local]--[hash:base64:5]',
              importLoaders: 2,
            },
          }, {
            loader: 'postcss-loader',
            options: {
              plugins: [autoprefixer({
                browsers: [
                  '>1%',
                  'last 4 versions',
                  'Firefox ESR',
                  'not ie < 9', // React doesn't support IE8 anyway
                ],
              })],
            },
          }, 'sass-loader'],
        }),
      }, {
        test: /\.s?css$/,
        include: /node_modules/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: [{
            loader: 'css-loader',
            options: {
              importLoaders: 1,
            },
          }, 'sass-loader'],
        }),
      }, {
        test: /\.(jpe?g|gif|png|svg|eot|woff|ttf)$/i,
        loader: 'url-loader',
        options: {
          limit: 10000,
          name: 'assets/[name].[hash:8].[ext]',
        },
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      inject: true,
      template: path.resolve(__dirname, 'index.html'),
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeRedundantAttributes: true,
        useShortDoctype: true,
        removeEmptyAttributes: true,
        removeStyleLinkTypeAttributes: true,
        keepClosingSlash: true,
        minifyJS: true,
        minifyCSS: true,
        minifyURLs: true,
      },
    }),
    new webpack.DefinePlugin({
      'process.env': {
        // To get React production build
        NODE_ENV: JSON.stringify('production'),
      },
    }),
    new webpack.optimize.OccurrenceOrderPlugin(),
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        screw_ie8: true, // React doesn't support IE8
        warnings: false,
      },
      mangle: {
        screw_ie8: true,
      },
      output: {
        comments: false,
        screw_ie8: true,
      },
      sourceMap: true,
    }),
    new ExtractTextPlugin('styles.css'),
  ],
};