webpack.config.js

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

const isProduction = process.env.NODE_ENV == 'production';


const stylesHandler = isProduction ? MiniCssExtractPlugin.loader : 'style-loader';

const config = {
    entry: './src/index.ts',
    output: {
        path: path.resolve(__dirname, 'dist'),
    },
    devServer: {
        open: true,
        host: 'localhost',
    },
    plugins: [
        new HtmlWebpackPlugin({
            template: 'index.html',
            favicon: 'src/favicons/favicon.ico',
        }),
        new CopyPlugin({
            patterns: [
                {
                    from: "src/js-dos",
                    to: "js-dos",
                },
                {
                    from: "src/favicons",
                    to: "",
                }
            ],
            options: {
                concurrency: 100,
            }
        }),
    ],
    module: {
        rules: [
            {
                test: /\.(ts|tsx)$/i,
                loader: 'ts-loader',
                exclude: ['/node_modules/'],
            },
            {
                test: /\.css$/i,
                use: [stylesHandler, 'css-loader'],
            },
            {
                test: /\.s[ac]ss$/i,
                use: [stylesHandler, 'css-loader', 'sass-loader'],
            },
            {
                test: /\.(eot|svg|ttf|woff|woff2|png|jpg|gif)$/i,
                type: 'asset',
            },
            {
                test: /\.jsdos$/i,
                type: 'asset',
                generator: {
                    filename: '[name][ext]',
                },
            },
        ],
    },
    resolve: {
        extensions: ['.tsx', '.ts', '.jsx', '.js', '...'],
    },
};

module.exports = () => {
    if (isProduction) {
        config.mode = 'production';
        config.plugins.push(new MiniCssExtractPlugin());
        config.plugins.push(new WorkboxPlugin.GenerateSW({
            clientsClaim: true,
            skipWaiting: true,
            maximumFileSizeToCacheInBytes: 12000000
        }));
    } else {
        config.mode = 'development';
    }
    return config;
};