JSFiddle - React, Tailwind, and code Playground

HTML

<div id="div" class="qwerty"></div>

CSS

#div {
  width: 200px;
  height: 200px;
  background-color: #a35b35;
}

JavaScript

var abc;
    div = document.getElementById("div");
    div.addEventListener("click", function(){abc=this.className;alert(abc);}, false);
    alert(abc);