JSFiddle - React, Tailwind, and code Playground

HTML

<div class="elem">click</div>
<div class="elem">click2</div>
<div class="elem">click3</div>

CSS

.elem{
  cursor:pointer;
  margin-top:10px;
}

JavaScript

elem = document.querySelectorAll('.elem');

for (var i=0;i<elem.length-1;i++){
	elem[i].onlick = function(){
  	elem[this].innerHTML = 'selected';
  } 
}