JSFiddle - React, Tailwind, and code Playground

JavaScript

var tmpImg = new Image();
tmpImg.src="https://assets.servedby-buysellads.com/p/manage/asset/id/32054"; //or  document.images[i].src;
$(tmpImg).on('load',function(){
  var orgWidth = tmpImg.width;
  var orgHeight = tmpImg.height;
  alert(orgWidth+"x"+orgHeight);
});