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

That is true and a bit unfortunate.

In browsers that support `backdrop-filter`, you can put a fixed 
element on top of everything (with `pointer-events: none`) and apply 
the filter you want as that element's backdrop filter. But that's more
 a workaround than a true solution.

A better solution would be the ability to set the filter directly on 
the containing block for fixe-position elements. I don't know how you 
would expose that.

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Received on Wednesday, 2 November 2016 18:13:12 UTC