JSONP cross domain requests with ajax (info in docs)

[bosak.tomas@…]

This is not a bug, but probable misleading information in documentation: jQuery.ajax() function

• error(jqXHR, textStatus, errorThrown) callback handler

It's stated there that: Note: This handler is not called for cross-domain script and JSONP requests.

However after some testing (with jquery 1.5.1) it looks like error handler is now called when error happens during JSONP cross-domain ajax requests using this function. This behavior (which is stated in documentation) was true for previous versions of jquery (for example error handler isn't called with jqeury 1.4).

[dmethvin]

Can you post some more information about when this occurs?

[yojimbo87]

Sure. Here is code with jQuery 1.5.1 which will alert timeout error because 1 ms timeout is too small to process the request:  http://jsfiddle.net/yojimbo87/5P84g/

And here is the same code with jQuery 1.4.4 which alerts success although it should also do the same thing (alert timeout error) as in first example:  http://jsfiddle.net/yojimbo87/8vbgX/

Again this is not a jQuery bug, but an ajax documentation "issue" (error handler) which should be probably updated to reflect the current state which is: error handler is called also for JSONP requests (I haven't tried it with cross-domain scripts).

[timmywil]

Thank you! The docs will be updated accordingly.

[anonymous]

Cross domain jsonp requests do not seem to be working with $.ajax(). The error handler is not called when I am using dataType: 'jsonp', however this does work with dataType: 'xml'.

[yojimbo87]

Replying to anonymous:

Cross domain jsonp requests do not seem to be working with $.ajax(). The error handler is not called when I am using dataType: 'jsonp', however this does work with dataType: 'xml'.

I just tried the same example with cross-domain JSONP data type request and error handler was fired when using jQuery 1.5.2 and not fired using jQuery 1.4.4.

[addyosmani]

I've re-tested this to establish the version where the change was made and updated the docs to reflect it:  http://api.jquery.com/jQuery.ajax/

[jon_wu]

The docs are still misleading. The jQuery.ajax docs still say: "Note: This handler is not called for cross-domain script and JSONP requests."

The snippet that opened this issue shows that the handler is called actually called. I've noticed that it's called for at least timeout and parsererror.

In addition, the global error handler isn't called. This would be expected if the error callback passed to jQuery.ajax didn't fire but since it does, it's unexpected.

Examples:  http://jsfiddle.net/pte5g/