hi to all greenSock users! i'm working on a project and i'm trying to figure out how to add a class to the activeItem(which for me is the item in foreground, with: z-index:100). the reason i need it is to apply a click listener to this item in order to flip the card and at the same time the other cards shouldn't flip. i was reading here around but unfortunately couldn't find anything.   thanks for your help!! See the Pen rNqLEgE by JulianCastravet (@JulianC