JSFiddle - React, Tailwind, and code Playground

CSS

.some-div {
    background-color: red;
    position: relative;
}

JavaScript

var f = document.createDocumentFragment(),
    i = 0,
    max = 10000,
    d;

for (; i < max; i++) {
    d = document.createElement('div');
    d.innerHTML = 'test';
    d.className = 'some-div';
    d.style.top = parseInt(Math.random() * 1000, 10) + 'px';
    d.style.left = parseInt(Math.random() * 1000, 10) + 'px';
    f.appendChild(d);
}

document.body.appendChild(f);