[scroll-animations-1] Clarify that progress percentages must be between 0% and 100% #8552
Description
While checking #5203 (comment), I noticed the scroll-animations-1 spec doesn’t mention that the percentages for the timeline ranges must be between 0% and 100%.
Furthermore the original <keyframe-selector> definition from css-animations-1 seems to have inadvertently been relaxed as the allowed range for <percentage> is no longer mentioned.
-
css-animations-1:
<keyframe-selector> = from | to | <percentage [0,100]> -
scroll-animations-1:
<keyframe-selector> = from | to | <percentage> | <timeline-range-name> <percentage>
I think we should explicitly mention the allowed range.