JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

div {
    padding: 20px;
    border: 1px black solid;
}

JavaScript

function minhaFuncao(e){
    e.target.innerHTML = visitas++;
    
}
var visitas = 0;
var elemento = document.querySelector('div');
elemento.addEventListener('mouseover', minhaFuncao);