JSFiddle - React, Tailwind, and code Playground

HTML

<div id="bbb">Щёлк</div>

CSS

#bbb {
  border: 1px solid;
  margin-top: 30px;
}

JavaScript

bbb.onclick = function foo(){
	alert("Отступ сверху " + bbb.getBoundingClientRect().top
  + "px "\n
  + "Отступ слева " +
  bbb.getBoundingClientRect().left + "px ")
}