JSFiddle - React, Tailwind, and code Playground

HTML

<h1>Waiting for firebase.js to load</h1>

JavaScript

$.ajax({
 url: 'https://cdn.firebase.com/v0/firebase.js',
 dataType: 'script',
 cache: true, 
 success: function() {
  // callback on success
  document.getElementsByTagName('h1')[0].innerText = 'firebase.js loaded';
 }
});