New thread, because question is new: I asked earlier how to uniquely identify a Wix User (to store repeater scrolling state in DB, not in session, because this might have been turned off by user), wrongly assuming that user.id was only issued for a logged on user. Turns out that also visitors are issued an (extremely long) user.id . And it turns out that Wix tracks this in session storage. If this is turned off, state is (obviously) lost and every new page inside the repeater would receive a NEW user.id, thus scrolling would not work.
So the DB solution is no solution against turned off storage. So back to session storage (is a lot easier too). Now the question: is there any way I can check if user has turned off session storage and put a warning on screen?