webpack.config.js

var webpack = require('webpack');
var path = require('path');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
var CompressionPlugin = require('compression-webpack-plugin');

var BUILD_DIR = path.resolve(__dirname, 'client/dist');
var APP_DIR = path.resolve(__dirname, 'client/src');

var config = {
  devtool: 'source-map',
  entry: APP_DIR + '/index.js',
  output: {
    path: BUILD_DIR,
    filename: 'bundle.js'
  },
  module : {
    loaders : [
      {
        test : /\.jsx?/,
        include : APP_DIR,
        loader : 'babel-loader'
      },
      {
        test: /\.(png|jpg)$/,
        loader: 'url-loader?limit=8192'
      }
    ]
  },

  plugins: [
     new UglifyJsPlugin({
      sourceMap: false
    }),
     new webpack.DefinePlugin({
      'process.env': {
        'NODE_ENV': JSON.stringify('production')
      }
    }),
    new webpack.optimize.DedupePlugin(),
    new CompressionPlugin({ 
          asset: "[path].gz[query]",
          algorithm: "gzip",
          test: /\.js$|\.css$|\.html$/,
          threshold: 10240,
          minRatio: 0.8
        })
  ]

};

// plugins: [
//     new UglifyJsPlugin({
//       sourceMap: true
//     })
//   ]

module.exports = config;

/*,
  plugins: [
    new UglifyJsPlugin({
      sourceMap: false
    })
  ]*/