JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

div
{
    background: #000;
    height: 200px;
    margin: auto;
    width: 150px;  
}

JavaScript

$(document).ready(function(){
    $('div')
        .hide()
        .slideDown(500, function () {
            $(this).slideUp(500);
        });
});