webpack.prod.js

const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');

module.exports = {
    entry: {
        'app': './src/js/app'
    },
    output: {
        path: path.resolve(__dirname, 'dist'),
        filename: 'js/[name].js'
    },
    module: {
        rules: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                use: {
                    loader: 'babel-loader',
                    options: {
                        presets: ['@babel/preset-env']
                    }
                }
            },
        ]
    },
    optimization: {
        minimizer: [new UglifyJsPlugin()],
    },
    plugins: [
        new CleanWebpackPlugin('dist'),
        new HtmlWebpackPlugin({
            filename: 'html/index.html',
            template: 'src/html/index.html',
            chunks: ['index']
        })
    ]
}