JSFiddle - React, Tailwind, and code Playground

HTML

<textarea id="foo"></textarea><br><a id="bar" href="#">A</a><div id="baz">DIV</div>
<h1 id="foooo">My First Heading</h1>

<p id="barbar">My first paragraph.</p>

JavaScript

d3.select("body").on("mouseover", function() {
  var x = d3.event.pageX, y = d3.event.pageY,
    elementMouseIsOver = document.elementFromPoint(x, y);

  console.log(elementMouseIsOver.id);
});