JQuery Animated Selector
Description: Select all elements that are in the progress of an animation at the time the selector is run. Additional Notes: Because :animated is a jQuery extension and not part of the CSS specification, queries using :animated cannot take advantage of the performance boost provided by the native DOM querySelectorAll() method. To achieve the best performance when using :animated to select elements, first select the elements using a pure CSS selector, then use .filter(":animated") . Example: Change the color of any div that is animated. <!DOCTYPE html> <html> <head> <style> div { background : yellow ; border : 1px solid #AAA; width:80px; height:80px; margin:0 5px; float:left; } div . colored { background : green ; } </style> <script src = "http://code.jquery.com/jquery-latest.js" ></script> </head> <body> ...