webpack.config.production.js

const webpack = require('webpack');
const baseConfig = require('./webpack.config.base');

const config = Object.create(baseConfig);

config.plugins = [
  new webpack.optimize.OccurrenceOrderPlugin(),
  new webpack.DefinePlugin({
    'process.env.NODE_ENV': JSON.stringify('production')
  }),
  new webpack.optimize.UglifyJsPlugin({
    compressor: {
      screw_ie8: true,
      warnings: false,
    },
  })
];

module.exports = config;