webpack.config.production.js

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

const config = Object.create(baseConfig);
config.plugins = [
  new webpack.optimize.OccurenceOrderPlugin(),
  new webpack.DefinePlugin({
    "process.env.NODE_ENV": JSON.stringify("production"),
  }),
  new webpack.optimize.UglifyJsPlugin({
    compressor: {
      screw_ie8: true,
      warnings: false,
    },
  }),
];

module.exports = config;