webpack.prod.js

const path = require('path');
const webpack = require('webpack');
const HtmlWebPackPlugin = require("html-webpack-plugin");
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const TerserPlugin = require('terser-webpack-plugin');

module.exports = {
    entry: './src/client/index.js',
    mode: 'production',
    module: {
        rules: [
            {
                test: '/\.js$/',
                exclude: /node_modules/,
                loader: "babel-loader"
            },
            {
                test: /\.scss$/,
                use: [ 'style-loader', 'css-loader', 'sass-loader' ]
            }
        ]
    },
    plugins: [
        new HtmlWebPackPlugin({
            template: "./src/client/views/index.html",
            filename: "./index.html",
        }),
        new MiniCssExtractPlugin({
            filename: "[name].css",
            chunkFilename: "[id].css"
        })
    ]
};