webpack.config.prod.js

var webpack = require('webpack');
var path = require('path');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var cssnano = require('cssnano');

var rewriteUrl = function (replacePath) {
  return function (req, opt) {  // gets called with request and proxy object
    var queryIndex = req.url.indexOf('?');
    var query = queryIndex >= 0 ? req.url.substr(queryIndex) : '';
    req.url = req.path.replace(opt.path, replacePath) + query;
  };
};

var config = {
  devtool: 'cheap-module-source-map',
  entry: {
    app: './src/index'
  },
  output: {
    filename: '[name].[hash].js',
    path: path.resolve('build'),
    publicPath: '/'
  },
  resolve: {
    root: path.resolve('./src'),
    extensions: ['', '.js', '.jsx']
  },
  plugins: [
    new HtmlWebpackPlugin({
      inject: true,
      template: './templates/index.html'
    }),
    new webpack.DefinePlugin({__IS_BROWSER__ : true }),
    new webpack.DefinePlugin({
      'process.env': {
        'NODE_ENV': JSON.stringify('production')
      }
    }),
    new webpack.optimize.UglifyJsPlugin({
	  beautify: false,
	  comments: false,
	  compress: {
		warnings: false,
		drop_console: true
	  },
	  mangle: {
		except: ['$', 'webpackJsonp'],
		screw_ie8 : true,
		keep_fnames: false
	  }
	}),
    new webpack.optimize.DedupePlugin(),
	new webpack.optimize.OccurrenceOrderPlugin()
  ],
  module: {
    loaders: [
      { test: /\.jsx?$/, exclude: /node_modules/, loader: 'babel',
        query: {
          presets: ['es2015', 'stage-2', 'react']
        }
      },
      {
        test: /\.scss$/,
        loaders: [
          'style',
          'css?modules&importLoaders=1&localIdentName=[path]___[name]__[local]___[hash:base64:5]',
          'postcss',
          'sass'
        ]
      },
      { test: /\.css$/, loader: 'style!css' },
      { test: /\.(png|svg)$/, loader: 'url-loader?limit=100000' },
      { test: /\.jpg$/, loader: 'file-loader' }
    ]
  },
  devServer: {
    proxy: [{
      path: new RegExp('/api/(.*)'),
      rewrite: rewriteUrl('/$1'),
      target: 'http://homestead.app/'
    }]
  },
  postcss: [
    cssnano({
      autoprefixer: {
        add: true,
        remove: true,
        browsers: ['last 2 versions']
      },
      safe: true,
      discardComments: {
        removeAll: true
      }
    })
  ]
};

module.exports = config;