JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>
<img src="http://i.imgur.com/1GAjw.jpg" />
<img src="http://i.imgur.com/ABktn.jpg" />
<img src="http://i.imgur.com/Hdr2G.jpg" />
<img src="http://i.imgur.com/J7wne.jpg" />

JavaScript

$(function() {    
    var loaded = 0;
    var numImages = $("img").length;
    $("img").load(function() {
        ++loaded;
        if (loaded === numImages) {
            alert("done loading");   
        }
    });
});