JSFiddle - React, Tailwind, and code Playground

HTML

<div id="test2">Test</div>

JavaScript

var $ = function(selectors) {
	return document.querySelectorAll(selectors);
}

NodeList.prototype.append = function (param) {
	var myNodeList = this;
	for (var i = 0; i < myNodeList.length; i++) {
		myNodeList[i].appendChild(param);
	}
	return this;
}

var p = document.createElement('p');
p.appendChild(document.createTextNode('а так работает'));

document.querySelectorAll("#test2").append(p);
console.log($("#test2"));