All you have to do is go to the Elements tab in the Webkit Inspector and right-click on the element you want to monitor.
"Break On" presents a list of events to watch for
You can choose any number of three options:
- Subtree Modifications - Watch for anything that changes anywhere in the elements contained by this element
- Attributes Modifications - Watch for any attribute values changing or attributes added/removed on this particular element
- Node Removal - Watch specifically for child elements being removed from this container element