JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css">
<button class="btn">click</button>

CSS

div {
  width: 100px;
  height: 100px;
  border: 1px solid blue;
}

JavaScript

const btn = document.querySelector('.btn');
btn.addEventListener('click', function() {
	const div = document.createElement('div');
  const icon = document.createElement('i');
  icon.className = 'fas fa-camera';
  div.prepend(icon);
  document.body.append(div);
});