SwitchTransition to Support "default" mode (similar to vue Transition modes)

[Nativ-Sibony]

When I use default mode on a simple fade-slide transition with Vue & Vue router on pages, I can see the transition happening simultaneously (so page leave to the left and a new page enter from the right in the same time).
Here I have to choose whether its "out-in" or "in-out" but the default mode is not supported.