Re: [fxtf-drafts] filter should be defined to establish a containing block for fixed and absolutely positioned elements (#11)

[The spec says]( that a filter on the HTML element does not break fixed position elements. In particular:

```A value other than none for the filter property results in the creation of a containing block for absolute and fixed positioned descendants unless the element it applies to is a document root element in the current browsing context.```

This behavior is implemented in at least Chromium and works correctly on this page (just tried it). This exception for the root element was made for the use case you described about fixed-position elements.

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Received on Sunday, 5 July 2020 05:09:43 UTC