webpack.prod.js

const common = require('./webpack.common.js');
const merge = require('webpack-merge');
const UglifyJSPlugin = require('uglifyjs-webpack-plugin');
const webpack = require('webpack');
const ManifestPlugin = require('webpack-manifest-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');

module.exports = merge(common, {
    // devtool: 'source-map',
    plugins: [
        new ManifestPlugin(),
        new CleanWebpackPlugin(['static/build']),
        new UglifyJSPlugin({ /* sourceMap: true */ }),
        new webpack.DefinePlugin({
            'process.env': {
                BROWSER: JSON.stringify(true),
                NODE_ENV: JSON.stringify(process.env.NODE_ENV || 'development')
            }
        })
    ],
    module: {
        rules: [
            {
                test: /\.jsx?$/,
                loader: 'babel-loader',
                exclude: [/node_modules/, /public/]
            }
        ]
    }
});