Make unmount requirement optional

[jrmyio]

Looking at the docs it appears the original component has to be unmounted in order to create a transition.

Would it make sense to add an option that does not require an element to be unmounted and still perform an "overdrive" transition?

A use case would be a popup / tooltip window that transitions out of the highlighted item but doesn't (always) cover it.

[berzniz]

The basic idea of react-overdrive is to transition from one element to another. If you transition the same element, you can use CSS's transitions to achieve that without the need for react-overdrive.