JSFiddle - React, Tailwind, and code Playground

by derekstory

HTML

<div id="box">
    <div id="content"></div>
</div>

CSS

#box {
    height: 100px;
    width: 100px;
    background: red;
    position: aboslute;
    transition: all 0.4s ease-in-out;
}
#content {
    width: 20px;
    background: green;
    height: 0;
    transition: all 0.4s ease-in-out;
    position: margin-top: -100px;
    margin-left: 50px;
    -webkit-transition: all .8s ease;
    -moz-transition: all .8s ease;
    -ms-transition: all .8s ease;
    -o-transition: all .8s ease;
    transition: all .8s ease;
}
#box:hover > #content {
    height: 20px;
}