JSFiddle - React, Tailwind, and code Playground

HTML

<div id="obj">kylik me</div>

CSS

#obj {width:100px;height:100px;margin:0 auto; border:1px solid red;text-align:center;line-height:100px;cursor:pointer;}

JavaScript

$("#obj").click(function(e){
    var x = e.pageX - this.offsetLeft;
    var y = e.pageY - this.offsetTop;
    alert('x: '+ x +' y: ' + y);
});