webpack 4.x chunks config

webpack-config.js

const path = require('path');
const lodash   = require('lodash');
const webpack = require('webpack');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const pkg = require(path.join(process.cwd(), 'package.json'));

const ENV = process.env.NODE_ENV || 'development';
const isProd = (ENV === 'production');

module.exports = {
    devtool: 'cheap-module-source-map',
    mode: ENV,
    entry: {
        [`${pkg.name}`]: 'src/index.js'
    },
    optimization: {
        minimize: true,
        runtimeChunk: {
            name: '01-runtime-chunk'
        },
        splitChunks: {
            cacheGroups: {
                common: {
                    test: /(node_modules)\//,
                    chunks: 'initial',
                    name: "02-common-chunk",
                    enforce: true
                }
            },
        }
    },
    output: {
        filename: '[name].js',
        library: lodash.camelCase(pkg.name),
        libraryTarget: 'umd',
        umdNamedDefine: true
    },
    devServer: {
        host: '0.0.0.0',
        port: 1818,
        hot: true,
        quiet: true,
        historyApiFallback: true,
        contentBase: './'
    },
    module: {
        rules: [{
            test: /\.(js|jsx)$/,
            use: [{
                loader: 'babel-loader'
            }]
        },
        {
            test: /\.css$/,
            use: [
                MiniCssExtractPlugin.loader,
                'css-loader',
                {
                    loader: 'postcss-loader',
                    options: {
                        config: {
                            path: './postcss.config.js'
                        },
                        sourceMap: true
                    }
                }
            ]
        }]
    },
    plugins: [
        new MiniCssExtractPlugin({
            filename: '[name].css',
            chunkFilename: '[id].css'
        }),

        new webpack.DefinePlugin({
            'process.env.NODE_ENV': JSON.stringify(ENV)
        })
    ]
};