Bug 34552 – jQuery UI customized addClass with duration and callback does nothing in Webkit

• Status: UNCONFIRMED
• Component: JavaScriptCore

[Joel]

Steps to reproduce:
1. Go to http://jqueryui.com/demos/addClass/
2. Once the page has finished loading, click "Run Effect" in the center box

Expected outcome:
The gray box gradually expands and its text becomes larger (view the page in Firefox 3.6 to see the intended behavior) and, after a few seconds, it returns to normal size.

Actual outcome:
Nothing happens. Same outcome in Chrome and Safari 4.0.x and 3.0.x (except possibly 3.0.10), as well as Firefox 3.5. Opera 10 performs the animation but messes it up pretty badly.