[scroll-animations-1] animation-range vs animation-duration (original) (raw)

If animation-range-start, animation-range-end, and animation-duration are all set, and duration doesn't exactly match the available range, what do we do?

Options proposed so far:

• Ignore animation-range-end.
• Ignore animation-duration.
• Take the smaller duration.

Related question: if animation-duration and animation-range-end are given but not animation-range-start, do we:

• define the range as the normal timeline start through the specified range end? (pins the duration at the start of the timeline)
• scope the animation to the given duration, pin it to the specified animation-range-end, and calculate the used value of animation-range-start accordingly?

Fwiw, my original interpretation was that the animation-range properties each (independently) cut the timeline down to a particular segment, and then duration and delay play within that segment instead of within the whole timeline.

An alternative view would be that animation-range is similar to inset, delay to padding or margin, and duration to width, and they operate as a set at the same time.

Which worldview do we want to go with? (Or something else?)