JSFiddle - React, Tailwind, and code Playground

HTML

<img src="http://www.w3schools.com/images/w3schoolslogoNEW310113.gif" alt="Smiley face">

JavaScript

$(document).ready(function() {
    $("img").load(function() {
        alert($(this).height());
        alert($(this).width());
    });
});