JSFiddle - React, Tailwind, and code Playground

HTML

<div id="box">
    <div id="label">Click here</div>
    <div id="contents">Contents of box</div>
</div>

CSS

#box {
    position: fixed;
    z-index: 999;
    bottom: -180px;
    left: 0;
    width: 300px;
    height: 200px;
    background-color: #000;
    color: #fff;
    text-align: center;
}

#label {
    height: 20px;
    cursor: pointer;
}

JavaScript

$('#box').bind('click', function() {
    $(this).stop().animate({ bottom: 0 }, 350);
}).bind('mouseleave', function() {
    $(this).stop().animate({ bottom: -180 }, 350);
});