monaco-editor/browser-esm-webpack-monaco-plugin/index.js

import * as monaco from "monaco-editor/esm/vs/editor/editor.api";

(function () {
	// create div to avoid needing a HtmlWebpackPlugin template
	const div = document.createElement('div');
	div.id = 'root';
	div.style = 'width:800px; height:600px; border:1px solid #ccc;';

	document.body.appendChild(div);
})();

monaco.editor.create(
	document.getElementById('root'),
	{
		value: `const foo = () => 0;`,
		language: 'javascript',
		theme: 'vs-dark'
	}
);