webpack.config.js

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

module.exports = {
    entry: './src/js/index.js',
    output: {
        path: path.resolve(__dirname, 'dist'),
        filename: 'bundle.js'
    },
    plugins: [
        new HtmlWebpackPlugin({
            filename: 'index.html',
            template: './src/index.html'
        })
    ],
    devServer: {
        contentBase: path.resolve(__dirname, 'dist')
    },
    module: {
        rules: [
            {
                test: /\.css$/i,
                use: ["style-loader", "css-loader"],
            },
            {
                test: /\.m?js$/,
                exclude: /node_modules/,
                use: {
                    loader: "babel-loader",
                    options: {
                        presets: ['@babel/preset-env']
                    }
                }
            },
        ]
    }
}