JSFiddle - React, Tailwind, and code Playground

HTML

<div>

</div>

CSS

div {
  background: red;
  position: relative;
  top: 5vh;
  margin: 0 auto;
  width: 300px;
  height: 300px;
}

JavaScript

document.querySelector("div").addEventListener('click', function(evt) {
  console.log(evt.offsetX, evt.offsetY, '----')
})