JSFiddle - React, Tailwind, and code Playground

by SengKook Park

HTML

<div>Very</div>
<div>Secret</div>

JavaScript

var elem = document.createElement('div')
elem.innerHTML = 'Child'

function insertAfter(elem, refElem) {
    var parent = refElem.parentNode;
    var next = refElem.nextSibling;
    if (next) {
        return parent.insertBefore(elem, next);
    } else {
        return parent.appendChild(elem);
    }
}

insertAfter(elem, document.body.firstChild) 
//insertAfter(elem, document.body.lastChild)