[css-align][css-position][css-anchor-position] Introduce "document containing block" for some purposes?
RESOLVED: Adopt the concept of document containing block (better name TBD) into position-4 and have anchor positioning use it by default instead of ICB
Resolutions were made for csswg-drafts/#10861.
[css-align][css-position][css-anchor-position] Introduce "document containing block" for some purposes?
Discussion.
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