JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

div {
    width: 100px;
    height: 100px;
    background: red;
    -webkit-transition: all 0.25s ease 0s;
    -moz-transition: all 0.25s ease 0s;
    transition: all 0.25s ease 0s;
}


div:hover {
    width: 300px;
}