webpack.prod.config.js

const path = require('path');
const webpack = require('webpack'); // eslint-disable-line
const ExtractTextPlugin = require('extract-text-webpack-plugin'); // eslint-disable-line

module.exports = {
  entry: './src/index.js',
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist'),
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: 'css-loader',
        }),
      },
      {
        test: /\.(gif|png|jpe?g|svg)$/i,
        loaders: [
          'file-loader',
          {
            loader: 'image-webpack-loader',
            query: {
              progressive: true,
              gifsicle: {
                interlaced: false,
              },
              optipng: {
                optimizationLevel: 4,
              },
              pngquant: {
                quality: '65-90',
                speed: 4,
              },
            },
          },
        ],
      },
      {
        test: /\.(eot|svg|ttf|woff|woff2)$/,
        loader: 'file-loader?name=public/fonts/[name].[ext]',
      },
    ],
  },
  plugins: [
    new webpack.LoaderOptionsPlugin({
      minimize: true,
      debug: false,
    }),
    new webpack.optimize.UglifyJsPlugin({
      beautify: false,
      mangle: {
        screw_ie8: true,
        keep_fnames: true,
      },
      compress: {
        screw_ie8: true,
      },
      comments: false,
    }),
    new ExtractTextPlugin('styles.css'),
  ],
};