JSFiddle - React, Tailwind, and code Playground

by andredgusmao

CSS

.success {
    color: green;
}
.error, .timeout {
    color: red;
}

JavaScript

function testImage(url, callback, timeout) {
    timeout = timeout || 5000;
    var timedOut = false, timer;
    var img = new Image();
    img.onerror = img.onabort = function() {
        if (!timedOut) {
            clearTimeout(timer);
            callback(url, "error");
        }
    };
    img.onload = function() {
        if (!timedOut) {
            clearTimeout(timer);
            callback(url, "success");
        }
    };
    img.src = url;
    timer = setTimeout(function() {
        timedOut = true;
        callback(url, "timeout");
    }, timeout); 
}
    

function record(url, result) {
    document.body.innerHTML += "<span class='" + result + "'>" + 
        result + ": " + url + "</span><br>";
}   

testImage("http://photos.smugmug.com/photos/344291068_HdnTo-Ti.jpg", record);

testImage("http://photos.smugmug.com/photos/invalid344291068_HdnTo-Ti.jpg", record);

testImage("http://www.cnn.com/foo.jpg", record);

testImage("https://www.google.com/images/srpr/logo3w.png", record);
testImage("http://tclhost.com/fVEno0v.gif", record);