webpack.config.prod.js

var webpack = require('webpack');

module.exports = {
  plugins: [
    new webpack.optimize.OccurenceOrderPlugin(),
    new webpack.optimize.UglifyJsPlugin({ compress: { warnings: false } }),
    new webpack.DefinePlugin({ 'process.env.NODE_ENV': '"production"', 'process.env.BROWSER': JSON.stringify(true) })
  ]
};