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You want to perform a certain action when a DOM element gets modified using jQuery. This could involve changing an attribute such as a CSS property, removing it from the document, etc.
Some browsers already support mutation events,[21] which would serve this need, but they’re not something you can use in a cross-browser fashion yet, and they aren’t integrated with jQuery.
[21] http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-eventgroupings-mutationevents