JSFiddle - React, Tailwind, and code Playground

JavaScript

var img = new Image();
img.onload = function(){
    alert( 'img: ' + img.width + 'x' + img.height + '  natural: ' + img.naturalWidth + 'x' + img.naturalHeight );
};
img.src = 'http://upload.wikimedia.org/wikipedia/en/b/b5/Boeing-Logo.svg';