JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-1.9.1.js"></script>
<body>
  <h1>
    Page Load Timer
  </h1>
  <p>
    Time to load: <span id="result"></span>
  </p>
  <!-- Page structure/content stuff, etc ... -->
</body>

JavaScript

$(document).ready(function(event) {
  var t1 = performance.now();
  //console.log("PageLoad duration: " + t1 + " milliseconds.")
  document.getElementById('result').innerHTML = t1;
});