JSFiddle - React, Tailwind, and code Playground

by igalst

HTML

<div class="a">
    <div class="b"></div>
</div>

CSS

div {
    height: 100px;
}

.a { 
    background: red; 
    border: solid 10px yellow;
    width: 360px;
}

.b { 
    background: blue; 
}