JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/ui-lightness/jquery-ui.css">

<a href='#'>click me</a>
<div id='container'>
<div id='box'></div>
</div>

CSS

#container {
    width: 300px;
    height: 300px;
    position:relative;
    background: yellow;
}
#box {
    width: 100px;
    height: 100px;
    display: none;
    background: orange;
    position: absolute;
    left: 100px;
    bottom: 0;
}

JavaScript

$('a').click(function() {
    $('#box').slideDown();
});