1,295
edits
Gecko:CSSScrollSnapping: Difference between revisions
→Proposal
| Line 25: | Line 25: | ||
* Zero. | * Zero. | ||
When scrolling an element with 'scroll-snap-vertical:mandatory' using UA scrolling mechanisms, the vertical offset gravitates to one of the snapping positions at the end of the scrolling gesture | When scrolling an element with 'scroll-snap-vertical:mandatory' using selected UA scrolling mechanisms, the vertical offset gravitates to one of the snapping positions at the end of the scrolling gesture. | ||
When scrolling an element with 'scroll-snap-vertical:proximity' using UA scrolling mechanisms, the vertical offset gravitates to one of the snapping positions at the end of the scrolling gesture, if it's "sufficiently close" to | When scrolling an element with 'scroll-snap-vertical:proximity' using selected UA scrolling mechanisms, the vertical offset gravitates to one of the snapping positions at the end of the scrolling gesture, if it's "sufficiently close" to a snapping position. | ||
Similarly for 'scroll-snap-horizontal'. | Similarly for 'scroll-snap-horizontal'. | ||
UAs can decide which scrolling mechanisms are subject to scroll snapping. For example, a UA might apply scroll snapping to touch-based panning and keyboard-driven scrolling but not scrollbar thumb dragging. Script-driven scrolling (e.g. setting <tt>scrollLeft</tt> or <tt>scrollTop</tt>) is never affected by scroll snapping. | |||
The details of snapping behavior are up to the UA. | |||
== Issues == | == Issues == | ||
* How to handle RTL | * How to handle RTL | ||