JSFiddle - React, Tailwind, and code Playground

HTML

<div id="my">
 наведи и кликни
</div>

CSS

#my{
  border: 1px solid black;
  width: 250px;
  height: 250px;
}

JavaScript

var block = document.getElementById("my");

block.addEventListener("mouseover", function(e) {
     console.log('мышка наведена');
  });
  
block.addEventListener("click", function(e) {
     console.log('клик');
  });