webpack.config.js

const webpack = require('webpack');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');

module.exports = {
    output: {
        path: __dirname + '/dist',
    },

    // Enable sourcemaps for debugging webpack's output.
    devtool: 'source-map',

    resolve: {
        // Add '.ts' and '.tsx' as resolvable extensions.
        extensions: ['.ts', '.tsx', '.js', '.json'],
    },

    module: {
        rules: [
            // All files with a '.ts' or '.tsx' extension will be handled by 'ts-loader'.
            {
                test: /\.tsx?$/,
                loader: 'ts-loader',
                type: 'javascript/esm',
            },

            // All output '.js' files will have any sourcemaps re-processed by 'source-map-loader'.
            {
                enforce: 'pre',
                test: /\.js$/,
                loader: 'source-map-loader'
            },
            {
                test: /\.css$/,
                use: [
                    MiniCssExtractPlugin.loader,
                    'css-loader',
                    {
                        loader: 'postcss-loader',
                        options: {
                            postcssOptions: {
                                plugins: [require.resolve('autoprefixer')],
                            },
                            sourceMap: true,
                        },
                    },
                ],
            },
        ]
    },
    plugins: [
        new CleanWebpackPlugin(),
        new MiniCssExtractPlugin({
            filename: "[name].css",
            chunkFilename: "[name].css"
        }),
    ],
    optimization: {
        minimizer: [
            new TerserPlugin({
                parallel: true,
                terserOptions: {
                    sourceMap: true,
                },
            }),
            new CssMinimizerPlugin(),
        ]
    },
};