[csswg-drafts] [css-anchor-position-1] Which writing-mode does position-try-tactics operate on? (#12869)

emilio has just created a new issue for https://github.com/w3c/csswg-drafts:

== [css-anchor-position-1] Which writing-mode does position-try-tactics operate on? ==
https://drafts.csswg.org/css-anchor-position-1/#typedef-position-try-fallbacks-try-tactic isn't particularly clear about whether `flip-block` means "block axis in the box's writing mode", or in the containing blocks' writing-mode.

I think WebKit at least uses the box's writing-mode, but given position-area by default operates on the containing-block's WM, that might be more consistent?

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/12869 using your GitHub account


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Received on Sunday, 28 September 2025 19:10:55 UTC