JSFiddle - React, Tailwind, and code Playground

by catfood

HTML

<div id="d1">
    <div id="d2"></div>
</div>

CSS

#d1{
    width:100px;
    background:red;
    padding-top:100px;
    position:relative;
}
#d2{
    background:blue;
    position:absolute;
    width:100px;
    height:100%;
}