webpack-prod-min.js

const path = require('path');
const {
    CleanWebpackPlugin
} = require('clean-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const TerserPlugin = require("terser-webpack-plugin");
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');

/* This generates the minified CSS production code.
 * It compresses both CSS and JavaScript
 * terser compresses javascript, 'optimize-css-assets-webpack-plugin'  compresses css
 * This works with the CSS-non-minify.js script, but this must run first
*/

module.exports = {
    entry: {
        main: './src/stooge.js',
        responsive: './src/stooge-responsive.js',
        colors: './src/stooge-colors.js',
    },
    output: {
        path: path.resolve(__dirname, 'dist'),
        // since there is no JS, just css, ignore the output
        filename: '../rubbish/[name]-ignore.js',
    },
    plugins: [
        new MiniCssExtractPlugin({
            filename: (pathData) => {
                return pathData.chunk.name === 'main' ? 'stooge.min.css' : 'stooge-[name].min.css'
            },
        }),
        new CleanWebpackPlugin({})
    ],

    module: {
        rules: [{
            test: /\.css$/i,
            use: [{
                    loader: MiniCssExtractPlugin.loader
                },
                "css-loader",
            ]
        }],

    },

    optimization: {
        minimize: true,
        minimizer: [new TerserPlugin({
                terserOptions: {
                    format: {
                        comments: /^\@/
                    }
                },
                extractComments: false,
            }),
            new OptimizeCssAssetsPlugin({})
        ],
    },

    mode: 'production',
    // devtool: "source-map",
}