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[css-align] align-content and scroll coordinates #9807
Description
In https://www.w3.org/TR/css-align-3/#overflow-scroll-position we write:
None of this changes how scroll coordinates are assigned: the origin is still where it would be in a start-aligned container, it just might be initially positioned outside the scrollport.
Wrt scroll coordinates, if we are referring to .scrollTop/.scrollLeft, I noticed when testing flex-flow: row-reverse etc that the initial scroll position corresponds to zero, so I think we should adjust the spec for alignment to be consistent with that: the initial scroll position corresponds to zero, even if that position is scrolled to the writing-mode–relative "end" of the scroller.
Activity
frivoal commentedon Jan 17, 2024
Consistency between row-reverse and alignment seems desirable. I think I could go either way about which of the origin and the initial position gets to be the 0 coordinate, but having the same answer in both cases sounds like the right thing to do.
Are we constrained by compat?
Loirooriol commentedon Jan 17, 2024
I think this is what was being discussed in #4957 (comment)
bfgeek commentedon Jan 17, 2024
I agree with @Loirooriol - this is what was being described in that issue.