webpack.config.js

const webpack = require('webpack');
const path = require('path');
// const HtmlWebpackPlugin = require('html-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');

module.exports = {
    mode: 'development',
    entry: path.resolve(__dirname, './src/index.js'),
    module: {
        rules: [
            {
                test: /\.js$/,
                use: [
                    {
                        loader: 'babel-loader',
                        options: {
                            rootMode: 'upward',
                        }
                    }
                ]
            },
            {
                exclude: /node_modules/,
                use: ['babel-loader'],
            },
            {
                test: /\.s[ac]ss$/i,
                use: [
                    // Creates `style` nodes from JS strings
                    "style-loader",
                    // Translates CSS into CommonJS
                    "css-loader",
                    // Compiles Sass to CSS
                    "sass-loader",
                ],
            },
        ],
    },

    output: {
        path: path.resolve(__dirname, './dist'),
        filename: 'bundle.js',
    },
    plugins: [
        new webpack.HotModuleReplacementPlugin(),
        // new HtmlWebpackPlugin({
        //     template: path.resolve(__dirname, './index.html'),
        // })
    ],
    devServer: {
        contentBase: path.join(__dirname, 'dist'),
        compress: true,
        port: 4000,
    },
    optimization: {
        minimize: true,
        usedExports: true,
        minimizer: [
            new TerserPlugin({
                parallel: true,
                terserOptions: {
                    module: true,
                    toplevel: true
                }
            }),
        ],
    }
};