Retrieve HTTP Status Code from error() Event in JQuery image.

Question

I need to load an image by Javascript, but know the difference between a 404 and 500 error if it fails.

I have code to load an image into an 'img' tag like the below:

var img = $('<img />').attr('src', url)
    .load(function() {
        // Do something.
    })
    .error(function(ev) {
        // What sort of error?
    });

In the error() function, I don't seem able to tell whether the error was a 500 or a 404. Is there any way of doing this?

I'm surprised that .error works at all! It shouldn't. Why does jQuery care that you setting the src attribute vs. any other attribute? How/why would it even be able to hook into the HTTP request for an element on the page? — Brad
– Brad, Commented Mar 24, 2013 at 17:00

sdespont · Accepted Answer · 2013-03-26 06:35:04Z

1

Handle and test http status page like this

DEMO

var img = $('<img />')
    .load(function() {
        // Do something.
    })
    .error(function(jqXHR, error, errorThrown) {  
       if(jqXHR.status&&jqXHR.status==404)
       {
            alert(jqXHR.responseText); 
       }
       else
       {
           alert("Something went wrong");
       }
    })
    .attr('src', url);

edited Mar 26, 2013 at 6:35

answered Mar 24, 2013 at 18:08

sdespont

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4 Comments

Paul Over a year ago

In Chrome, jqXHR.status seems always to be null. Therefore I seem always to get the 'Something went wrong' alert.

sdespont Over a year ago

I don't experiment your problem. Here is an example : jsfiddle.net/UQTY2/38

Paul Over a year ago

Hmm...how odd. The fiddle doesn’t work for me on Chrome on Mac OS X. Whatever I change the URL to, it shows 'Something went wrong'.

Jacques Over a year ago

jQuery only passes an event object to the error handler. See jQuery documentation

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