> stackBehavior (default: tweenState.stackBehavior.ADDITIVE). Subsequent tweening to the same state value will be stacked (added together). This gives a smooth tweening effect that is iOS 8's new default... The other option is tweenState.stackBehavior.DESTRUCTIVE, which replaces all current animations of that state value by this new one.
This is not much different from WPF's animation support, and I don't think it really helps. The interruptions are still not very natural looking. It was definitely useless for Surface (the table, not the tablet) when I was doing UX prototypes for it.
> stackBehavior (default: tweenState.stackBehavior.ADDITIVE). Subsequent tweening to the same state value will be stacked (added together). This gives a smooth tweening effect that is iOS 8's new default... The other option is tweenState.stackBehavior.DESTRUCTIVE, which replaces all current animations of that state value by this new one.
So DESTRUCTIVE is what allows interruption.