tools/webpack.config.dev.js
var webpack = require('webpack');
var baseConfig = require('./webpack.config.base.js');
var config = Object.create(baseConfig);
config.devtool = 'eval-source-map';
config.plugins = [
new webpack.optimize.OccurenceOrderPlugin(),
new webpack.DefinePlugin({
'process.env.NODE_ENV': JSON.stringify('development'),
}),
];
module.exports = config;