If you go to https://webkit.org/demos/scroll-snap/index.html and edit the html attribute to have dir="rtl", then you can never scroll past the first item in any of the demos with css scroll snapping using scroll-snap-type. I'm using specifically scroll-snap-type: x mandatory to build a photo carousel and it means we can't scroll past the first photo ever.
*** This bug has been marked as a duplicate of bug 193671 ***