webpack.config.js

const path = require('path');
const TerserPlugin = require('terser-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
// named export
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
    entry: './src/index.js',
    output: {
        filename: 'bundle[contenthash].js',
        path: path.resolve(__dirname, './dist'),
        publicPath: '' // for a website: 'http://my-domain.com/'
    },
    mode: 'none',
    module: {
        rules: [
            {
                test: /\.(png|jpg)$/,
                use: [
                    'file-loader'
                ]
            },
            {
                test: /\.(css)$/,
                use: [
                    MiniCssExtractPlugin.loader, 'css-loader'
                ]
            },
            {
                test: /\.(scss)$/,
                use: [
                    MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader'
                ]
            },
            {
                test : /\.js$/,
                exclude: /node_modules/,
                use: {
                    loader: 'babel-loader',
                    options: {
                        presets: [ '@babel/env' ],
                        plugins: [ 'transform-class-properties']
                    }
                }
            },
            {
                test: /\.hbs$/,
                use: [
                    'handlebars-loader'
                ]
            }
        ]
    },
    plugins: [
        new TerserPlugin(),
        new MiniCssExtractPlugin({
            filename: 'style[contenthash].css'
        }),
        new CleanWebpackPlugin({
            cleanOnceBeforeBuildPatterns: [
                '**/*',
                path.join(process.cwd(), 'build/**/*')
            ]
        }),
        new HtmlWebpackPlugin({
            title: 'Hello World',
            template: 'src/index.hbs',
            description: 'Some description'
        })
    ]
}