JSFiddle - React, Tailwind, and code Playground
HTML
<div id="wrapper">
<a href="#" class="anchorClass">A</a><div class="divClass">DIV</div>
</div>JavaScript
$('#wrapper').mouseover(function(e) {
var x = e.clientX, y = e.clientY,
elementOnMouseOver = document.elementFromPoint(x, y);
elementClass=$(elementOnMouseOver).attr('class');
alert(elementClass);
});