Skip to main content

Bug Tracker

Side navigation

#534 closed bug (fixed)

Opened December 17, 2006 10:08AM UTC

Closed December 29, 2006 01:51PM UTC

Last modified October 14, 2008 10:29AM UTC

success-event not fired on synchronous AJAX events on FF (with fix)

Reported by: void Owned by:
Priority: major Milestone: 1.1a
Component: ajax Version:
Keywords: onreadystatechange, firefox Cc:
Blocked by: Blocking:

If you do an non-asynchronous AJAX request, like so:


then the 'success' function is not called on FireFox ( on WinXP).

This is because Firefox does not fire the 'onreadystatechange' event on

synchronous ajax calls. The fix is easy, just change 2 lines of code:

Line 1975 in jquery-1.0.4.js:

if(s.async) xml.onreadystatechange = onreadystatechange;

Line 1994 in jquery-1.0.4.js:

if (!s.async) onreadystatechange();
Attachments (0)
Change History (6)

Changed December 21, 2006 12:54PM UTC by joern comment:1

resolution: → worksforme
status: newclosed

I can't confirm this (with FF This is the test code:

test("synchronous request with callbacks", function() {
	var result;
	$.ajax({url: "data/json.php", async: false, success: function(data) { result = data; }});
	ok( /^{ "data"/.test( result ), "check returned text" );

Please reopen if the problem persists.

Changed December 25, 2006 01:57PM UTC by void comment:2

resolution: worksforme
status: closedreopened

The problem does persist... If you search Google Groups, you will find many reports

about this issue: Firefox does not fire the onreadyStateChange on syncrhonous AJAX






Once again, my example is this:


Tested on FF on WinXP and on

FF on Linux: both do not call the 'success' function.

Please test it as in this example, I'm sure you will find the same results.


Changed December 28, 2006 12:39PM UTC by joern comment:3

resolution: → worksforme
status: reopenedclosed

Your example works just fine. Did you try if it works with "async: true"? Maybe the problem is elsewhere. Otherwise: Please setup a test page that clearly shows the problem.

Changed December 28, 2006 02:31PM UTC by void comment:4

resolution: worksforme
status: closedreopened

Alright, here's the online example for ya:

Need more info? I am more than willing to answer your questions.

Contact me at arjan -the well known separator- avoid dot org

Changed December 29, 2006 12:02PM UTC by joern comment:5

Interesting. My guess: This was fixed in FF 2, therefore it works for me. Got to install FF 1.5 again.

Changed December 29, 2006 01:51PM UTC by joern comment:6

resolution: → fixed
status: reopenedclosed

Fixed in SVN. It is a FF1.5 only-problem, but now handled by jQuery.