Rick Byers

# Custom scroll limit - Limit scrolling to a sub-region of the scrollable area - IE/Edge has [-ms-scroll-limit](https://msdn.microsoft.com/en-us/library/jj127336%28v=vs.85%29.aspx) - I'm actually not sure of the real-world use case for this,...

# Custom overscroll effect - When reaching the scroll limit, draw a custom effect indicating how far beyond the limit scrolling is being attempted - Takes scroll fling behavior into...

Dean - some notes to add to **pull to refresh** (capturing some of the trickier details for a really great effect) - Can transition into and out-of the overscroll effect...

Some additional notes for _hidey bars_ - When a scroll operation ends (eg. fingers lifted from touchpad), may animate to either fully shown or fully hidden

# Scroll header - A header that is shown only when scrolling down (like hidey bars) - When approaching scrollTop=0 header smoothly animates into a more substantial one. Eg. images,...

By the way, there are a number of interesting non-scrolling compositor working uses cases too. We'll add those to the repo elsewhere (perhaps we should split the issue label to...

As Rossen suggests on public-houdini, I'm moving these to the wiki [here](https://wiki.css-houdini.org/extensible-scrolling-use-cases).

Ugh, apparently there are still permissions problems with the Houdini wiki (eg. @tdresser joined CSSWG just so he'd have the ability to edit the wiki, but still has been unable...

Ok, everything is now copied [here](https://github.com/w3c/css-houdini-drafts/blob/master/scroll-customization-api/UseCases.md) and [here](https://github.com/w3c/css-houdini-drafts/blob/master/composited-scrolling-and-animation/UseCases.md), though it probably needs some more cleanup / organization. Should we close this issue, or keep it open for discussion of further...

I filed a [chromium bug](https://bugs.chromium.org/p/chromium/issues/detail?id=768917) to discuss what should be done there, but I think that's probably orthogonal (best case, it'll be awhile before Chrome and Safari ship with these...