Currently scroll-buttons scroll the originating element by one "page".

https://www.w3.org/TR/css-overflow-5/#scroll-buttons

The ::scroll-button() pseudo-elements are both focusable and activatable by default, with their activation behavior being to scroll their originating element by one "page" in their associated direction, similar to pressing PgUp/PgDn keys.

It could be useful to allow the scroll-buttons to scroll to the next or the previous snap-point.

This is useful when styles are applied to the snapped element, as in the horizontal cards demo and the 3d-demo, either to highlight the snapped element and its content, or to reduce focus on the items that are not snapped.

(This might require inertness on the elements that are not snapped)

In these examples the galleries are designed to scroll element by element, but currently the scroll-buttons will only allow you to scroll page by page.