JSFiddle - React, Tailwind, and code Playground

HTML

<div id="parent">
  <p>
    Static Element
  </p>
</div>

JavaScript

HTMLElement.prototype.appendFirst=function(childNode){
    if(this.firstChild)this.insertBefore(childNode,this.firstChild);
    else this.appendChild(childNode);
};

var divParent = document.getElementById('parent');

var pFirst = document.createElement('p');
pFirst.innerHTML = 'First Element insert by appendFirst';
divParent.appendFirst(pFirst);