refer/webpack.config.development.js

redux-like library for handling global state on functional style

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

var config = Object.create(baseConfig);
config.plugins = [
  new webpack.optimize.OccurenceOrderPlugin(),
  new webpack.DefinePlugin({
    'process.env.NODE_ENV': JSON.stringify('development')
  })
];

module.exports = config;