JSFiddle - React, Tailwind, and code Playground

by Hugo Carneiro

HTML

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<div class="col-sm-4">
  <div class="hidden">
    <img id="hidden-image" src="http://www.clker.com/cliparts/F/Y/1/r/H/H/butterfly-large-hi.png">
  </div>
</div>

JavaScript

setTimeout(function() {
	var img = document.getElementById('hidden-image');
  var width = img.clientWidth;
  var height = img.clientHeight;

  console.log(width);
}, 3000);