JSFiddle - React, Tailwind, and code Playground

by IllusionMH

HTML

<div id="border">Border</div>
<div id="outline">outline</div>
<div id="hover"></div>

CSS

#border {
    width: 100px;
    height: 100px;
    border: 5px solid black;
    margin: 5px;
}
#outline {
    width: 100px;
    height: 100px;
    margin: 10px; 
    outline: 5px solid black;
}
#hover {
    position: absolute;
    width: 100px;
    height: 100px;
    top: 70px;
    left: 70px;
    background-color: gray;
}