JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <div id="1">1</div>
    <div id="2">2</div>
    <div id="3">3</div>
    <div id="4">4</div>
</div>

JavaScript

var _4th = document.getElementById('4');
var parent = _4th.parentNode;
var _1st = parent.firstChild;
parent.insertBefore(_4th, _1st);