How to check if the image returned with 404 error via javascript.
Below a sample code, I want to check if the get of this image is 404. If I want to put a certain image, if it does not return the image.
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<img src="http://pbs.twimg.com/profile_images/438827041199099904/ZLjBL8Tg_normal.jpeg"alt=""/ id="teste">
</body>
</html>
Another solution coming from SOen based on an article that no longer exists today ( link of the Files).
// First a couple helper functions
function $(id) {
return !id || id.nodeType === 1 ? id : document.getElementById(id);
}
function isType(o,t) { return (typeof o).indexOf(t.charAt(0).toLowerCase()) === 0;}
// Here's the meat and potatoes
function image(src,cfg) { var img, prop, target;
cfg = cfg || (isType(src,'o') ? src : {});
img = $(src);
if (img) {
src = cfg.src || img.src;
} else {
img = document.createElement('img');
src = src || cfg.src;
}
if (!src) {
return null;
}
prop = isType(img.naturalWidth,'u') ? 'width' : 'naturalWidth';
img.alt = cfg.alt || img.alt;
// Add the image and insert if requested (must be on DOM to load or
// pull from cache)
img.src = src;
target = $(cfg.target);
if (target) {
target.insertBefore(img, $(cfg.insertBefore) || null);
}
// Loaded?
if (img.complete) {
if (img[prop]) {
if (isType(cfg.success,'f')) {
cfg.success.call(img);
}
} else {
if (isType(cfg.failure,'f')) {
cfg.failure.call(img);
}
}
} else {
if (isType(cfg.success,'f')) {
img.onload = cfg.success;
}
if (isType(cfg.failure,'f')) {
img.onerror = cfg.failure;
}
}
return img;
}
Usage:
image('http://somedomain.com/image/typooed_url.jpg', {
success : function () {alert(this.width)},
failure : function () {alert('Oops!')}
});
image('https://www.gravatar.com/avatar/bac48b9b301f4b2aea7ec399a14b8bc9?s=128&d=identicon&r=PG', {
success : function () {/** ... */},
failure : function () {alert('Oops!')},
target : 'successImageContainer'
});
Demo no Fiddle .
At first glance it seems to be over-resource, but if it were to be seen, if it resulted in a 404 you would have to make some conditions and then some callbacks come in handy.
You can use a listener for the onerror event:
<img src="http://pbs.twimg.com/profile_images/438827041199099904/ZLjBL8Tg_normal.jpeg"alt=""/ id="teste">
<script>
document.getElementById('teste').onerror = function() {
alert('Xi, deu erro!');
}
</script>
You can make a request HEAD and check the return status of url .
function checkStatus(imageUrl)
{
var http = jQuery.ajax(
{
type:"HEAD",
url: imageUrl,
async: false
})
return http.status;
}
And use it this way:
var imageUrl = 'http://pbs.twimg.com/profile_images/438827041199099904/ZLjBL8Tg_normal.jpeg';
var statuscode = checkStatus(imageUrl);
if (statuscode == 200)
{
// Existe!
} else if (statuscode == 404)
{
// Não existe!
}
// else if....
You can make a load in the url of the image to check if it exists:
function checkImagem(url) {
var img = '<img src="'+ url +'" />';
$(img).load(function() {
$('body').append(url+img);
}).bind('error', function() {
alert('imagem: '+url+' não existe');
});
}
Example: JSFiddle