addClass not animating

[quasipickle]

Calling addClass() with a second parameter does not animate the style change, unless the element has a "class" attribute.

Example: ​http://jsfiddle.net/Z6mJU/108/ (Note: jsFiddle only has v1.8.16, but I'm experiencing the problem with 1.8.17, it's just not demonstrable via jsFiddle)

Affected jQueryUI versions: 1.8.17 (running the above Fiddle with v1.8.9 and v1.8.7 do work, so I'm guessing this is a regression?

Browsers tested: Firefox 9.0.1, Chrome 17

OS tested: OS X

Expected results: all animate-able properties of the class to be added, get animated in over the provided duration.

Encountered results: Without a "class" attribute, the class gets added immediately - just as it would with the default jQuery addClass() function.

[scottgonzalez]

The linked fiddle doesn't exist.

[scottgonzalez]

Confirmed. The test case is as easy as it sounds.

[scottgonzalez]

This works fine in master: ​http://jsfiddle.net/Z6mJU/110/

[jngeist]

Replying to scott.gonzalez:

This works fine in master: ​http://jsfiddle.net/Z6mJU/110/

Unfortunately, that's not accurate. In that fiddle, JQueryUI isn't loaded. Loading JQueryUI reproduces the problem.

This modification of that fiddle better represents the problem, and also includes a workaround which itself demonstrates the problem: ​http://jsfiddle.net/Z6mJU/144/

With JQueryUI enabled, the first div--which has no class attribute in the HTML--doesn't animate, but jumps directly to the applied class.

The second div--which has a class attribute--does animate as intended.

By adding a dummy class to the third (and thus establishing a class attribute) before adding the animated addClass call, the animation applies as intended.

[scottgonzalez]

Actually, jQuery UI is loaded in my fiddle. I have no idea why you think it's not. What do you think is causing the animation if jQuery UI is not loaded? All you've done in your fiddle is go back to using jQuery UI 1.8.16, which I've confirmed is broken.

[jngeist]

Replying to scott.gonzalez:

Actually, jQuery UI is loaded in my fiddle. I have no idea why you think it's not. What do you think is causing the animation if jQuery UI is not loaded? All you've done in your fiddle is go back to using jQuery UI 1.8.16, which I've confirmed is broken.

I was just coming back to say this, because I am obviously an idiot. Sorry about this.

[scottgonzalez]

#8222 is a duplicate of this ticket.

[Corey Frang]

Effects: Backporting e8ba367 to 1-8-stable - Fixes #8113 - addClass not animating

Changeset: e220cf2a7dc709fdbbdfeacbb29378e005a0afd8

[gnarf]

Should be fixed in next 1.8 release (1.8.19)

[scottgonzalez]

#7952 is a duplicate of this ticket.