webpack.prod.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CompressionPlugin = require('compression-webpack-plugin');
const UglifyJSPlugin = require('uglifyjs-webpack-plugin');

module.exports = {
    entry: {
        app: './app/App.jsx',
        vendor: [
            'babel-polyfill',
            'is_js',
            'react',
            'react-dom',
            'react-redux',
            'react-router',
            'react-router-redux',
            'redux',
            'redux-actions',
            'redux-thunk',
        ],
    },

    output: {
        path: path.resolve(__dirname, 'dist'),
        filename: '[name].bundle.js',
    },

    module: {
        rules: [
            {
                test: /\.(js|jsx)$/,
                exclude: /node_modules/,
                loader: 'babel-loader',
            },
            {
                test: /\.(css|scss)$/,
                use: [
                    {loader: MiniCssExtractPlugin.loader},
                    'css-loader',
                    'sass-loader'
                ],
            },
        ]
    },
    plugins: [
        new HtmlWebpackPlugin({
            title: 'React-demo',
            template: './app/index.html',
            filename: 'index.html',
            minify: {
                collapseWhitespace: true,
                collapseInlineTagWhitespace: true,
                removeComments: true,
                removeRedundantAttributes: true
            }
        }),
        new MiniCssExtractPlugin({
            filename: 'app.bundle.css',
        }),
        new CompressionPlugin()
    ],
    resolve: {
        extensions: ['.js', '.jsx', '.css', 'scss']
    },
    devServer: {
        port: 8080
    },
    optimization: {
        minimizer: [
            new UglifyJSPlugin({
                cache: true,
                parallel: true,
                uglifyOptions: {
                    compress: true,
                    ecma: 8,
                    warnings: false,
                    mangle: true
                },
                sourceMap: false
            })
        ],
        splitChunks: {
            cacheGroups: {
                commons: {
                    chunks: 'all',
                    minChunks: 2,
                    minSize: 0
                },
                vendor: {
                    chunks: 'all',
                    name: 'vendor',
                    test: 'vendor',
                    enforce: true,
                    minChunks: 3
                },
            }
        },
    },
};