JSFiddle - React, Tailwind, and code Playground
HTML
<div id="d1">
<p id="p1">This is a paragraph.</p>
<p id="p2">This is another paragraph.</p>
</div>JavaScript
var para=document.createElement("p");
var node=document.createTextNode("This is new.");
para.appendChild(node);
var element=document.getElementById("d1");
element.appendChild(para);