JSFiddle - React, Tailwind, and code Playground

HTML

<div id="div1" class="my-div"></div>

CSS

.my-div {
    margin: 20px;
    height: 20px;
    width: 20px;
    background-color: #ddf;
}

JavaScript

var ids = 0;
var minhaClasse = 'my-div';

function addDiv() {
    var div = document.createElement('div');
    div.classList.add(minhaClasse);
    div.id = ids++;
	div.addEventListener('click', addDiv);
    document.body.appendChild(div);
}
document.querySelector('.my-div').addEventListener('click', addDiv);