webpack/examples/extra-async-chunk/webpack.config.js

var CommonsChunkPlugin = require("../../lib/optimize/CommonsChunkPlugin");

module.exports = {
	mode: "production",
	plugins: [
		new CommonsChunkPlugin({
			// process all children of the main chunk
			// if omitted it would process all chunks
			name: "main",
			// create a additional async chunk for the common modules
			// which is loaded in parallel to the requested chunks
			async: true
		})
	]
};