JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

div {
    width:100px;
    height:100px;
    background-color:#ccc;
    margin:50px;
}

div:hover {
    -webkit-box-shadow:inset 0px 0px 0px 10px #f00;
    -moz-box-shadow:inset 0px 0px 0px 10px #f00;
    box-shadow:inset 0px 0px 0px 10px #f00;
}