webpack.config.js

const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const TerserPlugin = require('terser-webpack-plugin');

module.exports = {
	mode: 'production',

	entry: {
		'cf-images': path.resolve(__dirname, 'assets/_src/app.tsx'),
		'cf-images-media': path.resolve(__dirname, 'assets/_src/js/media.js'),
	},

	output: {
		clean: {
			keep: /images/,
		},
		filename: '[name].min.js',
		path: path.resolve(__dirname, 'assets/js'),
	},

	module: {
		rules: [
			{
				test: /\.(jsx|tsx|ts)$/,
				exclude: /node_modules/,
				use: {
					loader: 'babel-loader',
					options: {
						presets: [
							'@babel/preset-env',
							'@babel/preset-typescript',
						],
					},
				},
			},
			{
				test: /\.s[ac]ss$/i,
				use: [MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader'],
			},
		],
	},

	devtool: 'source-map',

	watchOptions: {
		ignored: /node_modules/,
		poll: 1000,
	},

	externals: {
		'@wordpress/i18n': 'wp.i18n',
	},

	resolve: {
		extensions: ['.js', '.jsx', '.tsx', '.ts'],
	},

	plugins: [
		new MiniCssExtractPlugin({
			// Options similar to the same options in webpackOptions.output
			// both options are optional
			filename: '../css/[name].min.css',
			chunkFilename: '[id].min.css',
		}),
	],

	optimization: {
		minimize: true,
		minimizer: [
			new TerserPlugin({
				extractComments: false,
				terserOptions: {
					output: {
						comments: false,
					},
				},
			}),
		],
		splitChunks: {
			cacheGroups: {
				vendor: {
					test: /[\\/]node_modules[\\/](react|react-dom)[\\/]/,
					name: 'cf-images-react',
					chunks: 'all',
				},
			},
		},
	},
};