[REQUEST] Element change event

[gustavoiha]

Currently we can handle the animation events, but there's no way to know which element was changed. It would be great it was passed as an argument via an $emit.

[spsaucier]

Seconded -- this would absolutely be useful. As it is, I have to re-implement the 'is new section visible' logic if I want to trigger something on entry or exit of a section.