January 26, 2017 at 2:50 am #250538
Yep, it’s definitely the fact that one scrolls beyond the point of switching to fixed position before the transition has ended that’s the cause of the jumpy behaviour. Have a look at the pen though, I seem to have mostly solved it by checking the
translateY value to see it is still in progress or not.
Snippet removed, since it’s a work in progress