JSFiddle - React, Tailwind, and code Playground

HTML

<div class="foo"></div>

CSS

.foo{
	width: 100px;
	height: 100px;
	background-color: red;
}

JavaScript

if(document.elementFromPoint(30, 30) == ".foo"){
	alert("The red square  is within the coordinates")
}else{
	alert("The red square is outside the coordinates")
}