delay() and clearQueue() combination is problematic and incorrect

[JurekRaben]

Try this code:

$("element").delay(800).fadeOut(400);

$("element").clearQueue();

$("element").delay(8000).fadeTo(0,1).fadeTo(400,0.5);

The first queue with delay(800) will be cleared by clearQueue(). The new queue with delay(8000) will be executed with the delay value 800 of the first queue and not with 8000!

I think this bug can cause a lot of confusion and should be fixed.

In my opinion this happens because the return value of setTimeout in queue.js is not saved and won't be cleared with clearTimeout() in clearQueue().

If the second queue wasn't there, delay() would be still executed, but result in no operation, because the queue of the element would be empty. But the second delay-queue now again fills the queue of the element. So the first delay, not properly killed, will execute the next queue element of the second queue by execute jQuery.dequeue()...

Of course the second delay will execute too, no matter of clearQueue()-calls. This furthermore will cause lots of confusion.

[JurekRaben]

Tests for new queue.js

[JurekRaben]

.delay() bugfix and extension

Needs more testing...

Updated description .delay()

.delay( [ delayId ], duration, [ queueName ] )

• delayId = An optional string containing the name of the delay id. The delay can be interrupted by using * .removeDelay( delayId ).
• duration = An integer indicating the number of milliseconds to delay execution of the next item in the queue.
• queueName = A string containing the name of the queue. Defaults to fx, the standard effects queue.

Updated description .clearQueue()

.clearQueue( [ queueName ] )

• queueNameA = string containing the name of the queue. Defaults to fx, the standard effects queue.

Also clears all delays of the element.

New description .removeDelay( [ delayId ], [ queueName ] )

.delay( [ delayId ], duration, [ queueName ] )

• delayId = An optional string containing the name of the delay id. If no delayId is given, the last delay of the element will be canceled.
• queueName = A string containing the name of the queue. Defaults to fx, the standard effects queue.

Currently you need to clear all delays of an element, before you can append new operations the the element or you call .clearQueue() first.

[JurekRaben]

Link to the git fork: ​git://github.com/JurekRaben/jquery.git

[JurekRaben]

fixed

[JurekRaben]

added new tests

[mot]

This bug is really annoying. It will be fixed in 1.4.3?

[snover]

Resetting milestone to future.

[marcel@…]

Stumbled over that bug too. Here's a minimal jsFiddle ​http://jsfiddle.net/gpxG5/1/ for that issue.

[john]

Yeah, this is a duplicate of #6150.

[john]

Duplicate of #6150.