webpack.config.production.js

/* eslint-disable no-var */
var path = require('path');
var webpack = require('webpack');
var ExtractTextPlugin = require('extract-text-webpack-plugin');

module.exports = {
  devtool: 'source-map',
  entry: './src/client',
  output: {
    path: path.join(__dirname, 'assets'),
    filename: 'client.js',
    publicPath: '/assets'
  },
  resolve: {
    extensions: [ '', '.js', '.jsx' ]
  },
  plugins: [
    new ExtractTextPlugin('style.css'),
    new webpack.optimize.OccurenceOrderPlugin(),
    new webpack.DefinePlugin({
      'process.env': {
        'NODE_ENV': JSON.stringify('production')
      }
    }),
    new webpack.optimize.UglifyJsPlugin({
      compressor: {
        warnings: false
      }
    })
  ],
  module: {
    loaders: [{
      test: /\.(js|jsx)$/,
      loaders: ['babel?stage=0'],
      exclude: /node_modules\/(?!react-router)/
    },
    {
      test: /\.scss$/,
      loader: ExtractTextPlugin.extract(
        // activate source maps via loader query
        'css?sourceMap!' +
        'sass?sourceMap'
      )
    }]
  }
};