Problem:
I want to have a fixed bar hide when you scroll down, and reappear when you scroll up (common pattern in mobile and web).
You can currently only do this with a hover hack when viewing the prototype on web. I’d love to have this work on mobile so we can use this in UX research when the participant uses the prototype on their phone, as well as be able to play with it.
Doing this in a way that could be within a component so it can be on a long flow would be even better! But I just want the basics 
Thank you,
Yoni