JSFiddle - React, Tailwind, and code Playground

by joopmicroop

HTML

<div id="first"></div>
<div id="second"></div>

CSS

#first{
    box-sizing: content-box;
    -webkit-box-sizing: content-box;
    -moz-box-sizing: content-box;
    background: red;
}
#second{
    box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    background: yellow;
}
div{
    width:50px;
    height:50px;
    border: 20px solid black;
    margin:20px;
    padding:20px;
}