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">
<div id='topbar'>toggle me</div>

CSS

#topbar {
    background: orange;
    color: white;
    height: 10px;
    text-align:center;
}

JavaScript

$("#topbar").toggle(function(){
        $(this).animate({height:40},200);
    },function(){
        $(this).animate({height:10},200);
    });