webpack.prod.js

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

const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');

module.exports = {
    mode: 'production',

    output:{
        clean: true,
        filename: 'main.[contenthash].js'
    },
    module: {
        rules: [
            {
                test: /\.html$/i,
                loader: 'html-loader',
                options: {
                    sources: false,
                    minimize: false,
                },
            },
            {
                test: /\.css$/i,
                exclude: /style.css$/,
                use: ['style-loader', 'css-loader']
            },
            {
                test: /style.css$/,
                use: [MiniCssExtractPlugin.loader, 'css-loader']
            },
            {
                test: /\.(png|jpe?g|gif)$/i,
                use: [
                  {
                    loader: 'file-loader',
                  },
                ],
            },
            {
                test: /\.m?js$/,
                exclude: /node_modules/,
                use: {
                  loader: "babel-loader",
                  options: {
                    presets: ['@babel/preset-env']
                  }
                }
            }
        ]
    },
    optimization:{
        minimize: true,
        minimizer: [
            new CssMinimizerPlugin(),
            new TerserPlugin(),
        ]
    },
    plugins:[
        new HtmlWebpackPlugin({
            title: 'Todo App',
            template: './src/index.html',
            filename: './index.html',
            inject: 'body',
        }),
        new MiniCssExtractPlugin({
            filename: '[name].[fullhash].css',
            ignoreOrder: false
        }),
        new CopyPlugin({
            patterns: [
                { from: "src/assets/", to: "assets/" }
            ],
        }),
    ]
}