webpack.config.prod.js

var path = require('path')
var webpack = require('webpack')
var ExtractTextPlugin = require('extract-text-webpack-plugin')

module.exports = {
  devtool: 'source-map',
  entry: './src/index',
  output: {
    path: path.join(__dirname, 'dist'),
    filename: 'app.js',
    publicPath: '/'
  },
  plugins: [
    new webpack.optimize.OccurenceOrderPlugin(),
    new webpack.DefinePlugin({
      'process.env': {
        'NODE_ENV': JSON.stringify('production')
      }
    }),
    new webpack.optimize.UglifyJsPlugin({
      compressor: {
        warnings: false
      }
    }),
    new ExtractTextPlugin('app.css')
  ],
  module: {
    loaders: [{
      test: /\.js$/,
      loader: 'babel',
      include: path.join(__dirname, 'src')
    }, {
      test: /\.scss$/,
      loader: ExtractTextPlugin.extract('style', 'css?modules&sourceMap!sass?sourceMap'),
      include: path.join(__dirname, 'src')
    }, {
      test: /normalize.css$/,
      loader: ExtractTextPlugin.extract('style', 'css'),
      include: path.join(__dirname, 'node_modules', 'normalize.css')
    }]
  }
}