webpack.config.js

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

module.exports = {
    entry: ["@babel/polyfill", "./src/index"],
    module: {
        rules: [
            {
                test: /\.html$/,
                use: [
                    {
                        loader: 'html-loader',
                        options: { minimize: true },
                    },
                ],
            },
            {
                test: /\.js$/,
                exclude: /node_modules/,
                use: [
                    {
                        loader: 'babel-loader',
                        options: {
                            presets: ['@babel/preset-env']
                        }
                    },
                ],
            },
            {
                test: /\.(png|svg|jpg|gif)$/,
                use: [ 'file-loader' ],
            },
            {
                test: /\.css$/,
                use:  [ 'style-loader', MiniCssExtractPlugin.loader, 'css-loader' ]
            }
        ],
    },
    plugins: [
        new HtmlWebPackPlugin({
            template: './public/index.html',
            filename: './index.html',
        }),
        new MiniCssExtractPlugin({
            filename: 'style.css',
        })
    ],
};