JSFiddle - React, Tailwind, and code Playground

CSS

div {
    border: 1px solid black;
    width: 100px;
    height: 100px;
    background: #CCC;
}

JavaScript

// create the div elements
var newDiv = document.createElement("div");
newDiv.innerHTML ="INSPECT ELEMENTS in here to see the hidden input";

var count = document.createElement("INPUT");

// setup the hidden input
count.setAttribute("type", "hidden");
count.setAttribute("name", "count");
count.setAttribute("value", 5)

// does your code append the newDiv to the DOM?
newDiv.appendChild(count);
document.getElementsByTagName("body")[0].appendChild(newDiv);