JSFiddle - React, Tailwind, and code Playground

by lmk123

CSS

div {
  background: red;
  width: 100px;
  height: 100px;
  transition: width 2s;
}

div.run {
  width: 300px;
}

JavaScript

const div = document.createElement('div')
document.body.appendChild(div)
setTimeout(() => {
  div.classList.add('run')
})