webpack.prod.js

const HtmlWebpack    = require('html-webpack-plugin');
const MiniCssExtract = require("mini-css-extract-plugin");
const CopyPlugin     = require("copy-webpack-plugin");


const CssMinimizer   = require('css-minimizer-webpack-plugin');
const Terser         = require('terser-webpack-plugin');


module.exports = {
    mode: 'production',

    output: {
        clean: true,
        filename: 'main.[contenthash].js'
    },
    
    module: {
        rules: [
            {
               test: /\.html$/,
               loader: 'html-loader',
               options: {
                    sources: false,
               }
            },

            {
                test: /\.css$/,
                exclude: /styles.css$/,
                use: ['style-loader', 'css-loader']
            },
            {
                test: /styles.css$/,
                use: [MiniCssExtract.loader, 'css-loader']

            },

            {
                test: /\.(png|jpe?g|gif)$/,
                loader: 'file-loader'

            },

            {
                test: /\.m?js$/,
                exclude: /node_modules/,
                use: {
                  loader: "babel-loader",
                  options: {
                    presets: ['@babel/preset-env']
                  }
                }
            }
            
               
        ]
    },

    optimization: {
        minimize: true,
        minimizer: [
            new CssMinimizer(),
            new Terser()
        ]
    },
    

    plugins: [
        new HtmlWebpack({
            title: 'Mi Webpack App',
            // filename: 'index.html'
            template: './src/index.html'
        }),

        new MiniCssExtract({
            filename: '[name].[fullhash].css',
            ignoreOrder: false
        }),

        new CopyPlugin({
            patterns: [
               { from: 'src/assets/', to: 'assets/'}
            ]
            
        })

    ]
};