JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <div id="one">1</div>
    <div id="two">2</div>
    <div id="three">3</div>
</div>
<p>Lorem ipsum...</p>

CSS

#container { position: relative; border: 1px solid red; }
#one, #two, #three {
    width: 300px;
    height: 200px;
    border: 1px solid #ccc;    
}

JavaScript

var container = document.getElementById('container');
var one = document.getElementById('one');
container.appendChild(one);