Re: [csswg-drafts] [css-values-4] Difference of viewport and initial containing block size (#5218)

It's definitely some form of 2 in practice. (At least) Mobile browsers will create an ICB that is large enough to safely contain the largest visual viewport, which can be larger than the layout viewport.

It would probably be good to get some clarity on this, as it affects at least fixed position elements, as discussed in #8410.

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Received on Tuesday, 20 June 2023 13:40:02 UTC