Question

Why jQuery does not raise any error event when I execute following script?

thought I have registered the error event, but it is not fired.

chrome shows me following error in Network tab in Console.

GET http://www.google.com/adfdaf?callback=jQuery15204572567550931126_1321347602706&_=1321348668347 404 (Not Found)

javascript:

    $.ajax({
        type: "GET",
        url: 'http://google.com/adfdaf?callback=?',
        dataType: "jsonp",
        success: function (msg) {
            console.log('Custom Domain validated successfully.');
        },
        error: function () {
            console.log('Error occured while validating Custom Domain.');
        }
    });

Answer 1

The jQuery docs for .ajax state the following:

error(jqXHR, textStatus, errorThrown)

A function to be called if the
request fails. The function receives three arguments: The jqXHR (in
jQuery 1.4.x, XMLHttpRequest) object, a string describing the type of
error that occurred and an optional exception object, if one occurred.
Possible values for the second argument (besides null) are “timeout”,
“error”, “abort”, and “parsererror”. When an HTTP error occurs,
errorThrown receives the textual portion of the HTTP status, such as
“Not Found” or “Internal Server Error.” As of jQuery 1.5, the error
setting can accept an array of functions. Each function will be called
in turn. Note: This handler is not called for cross-domain script and
JSONP requests.

You can use .getJSON instead. For example:

$.getJSON("url?callback=?", function() {
    //Success!
}).error(function() {
    //Error!
});

Edit

Looks like that won’t work either. It seems the workaround is to supply a timeout option to .ajax:

$.ajax({
    type: "GET",
    url: 'http://google.com/adfdaf?callback=?',
    dataType: "jsonp",
    timeout: 5000,
    success: function (msg) {
        console.log('Custom Domain validated successfully.');
    },
    error: function () {
        console.log('Error occured while validating Custom Domain.');
    }
});

Obviously, that’s not ideal, but the error handler will run after 5 seconds.