text: const webpack = require('webpack');
  const merge = require('webpack-merge');
  const common = require('./webpack.common.js');
  const CleanWebpackPlugin = require('clean-webpack-plugin');
  const UglifyJSPlugin = require('uglifyjs-webpack-plugin');
  
  // This is the configuration used when building for the prod environment
  module.exports = merge(common, {
  	devtool: 'source-map',
  	plugins: [
  		new CleanWebpackPlugin(['dist/*']),
  		new UglifyJSPlugin({
  			sourceMap: true
  		}),
  		new webpack.DefinePlugin({
  			'process.env':{
  				'NODE_ENV': JSON.stringify('production'),
  			}
  		}),
  	],
  });
  