Re: [csswg-drafts] [css-transforms-2] Do 3D transforms contribute to scrollable overflow? (#8851)

Here's another test case: https://jsfiddle.net/6ha0u2rv/

Looking at that I think the current behaviour is:

WebKit uses the transform to compute overflow area, but just the local transform, not the 'accumulated 3d transform matrix'. As such, the scrollbars are correct for the first example, and wrong the other two.

Blink is similar, except also is trying to account for any perspective (but not preserve-3d). It seems like that's buggy though, since the scrollbars let you scroll further than expected.

Gecko is using the full 'accumulated 3d transform matrix', and all 3 tests case let you scroll to see the full transformed object (and nothing more).

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Received on Friday, 19 May 2023 00:59:38 UTC