JSFiddle - React, Tailwind, and code Playground

HTML

<p id="aaa" class="hidden">Some text</p>
<a  onclick=" toggler('qu', 'hidden');">link</a>

CSS

* .hidden {	display: none; }

JavaScript

function test() {
	

		var idContent = document.getElementById('aaa');
		idContent.innerHTML = "nesto";

}
function toggler(div, class_var) {
	  $('#'+div).toggleClass(class_var);
}