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Bug 30199 - What should happen if filter and background-attachment fixed; applied to the same element?
Summary: What should happen if filter and background-attachment fixed; applied to the ...
Alias: None
Product: CSS
Classification: Unclassified
Component: Filter Effects (show other bugs)
Version: unspecified
Hardware: PC All
: P2 normal
Target Milestone: ---
Assignee: Dean Jackson
QA Contact: public-css-bugzilla
Depends on:
Reported: 2017-11-20 11:44 UTC by Roland Soos
Modified: 2017-12-28 11:43 UTC (History)
4 users (show)

See Also:


Description Roland Soos 2017-11-20 11:44:21 UTC
I have an example where I use background-attachement:fixed; and filter:blur(15px); on the same element. Currently all browser I tested does the same. Applies blur only to the visible area of the fixed image, which I think is bad as filter should apply to the whole element. You can see the result on this example:

When you scroll down, you should see that a "box-shadow" like effect follows the visible rectangle of the image. I think that effect should stay on the whole div and when you scroll down, it should be visible at the top and at the bottom of the real image only.
Comment 1 Dirk Schulze 2017-12-24 06:45:31 UTC
Hi Roland, could you please open an issue here: ? Thanks a lot.
Comment 2 Dirk Schulze 2017-12-28 11:22:14 UTC
Moved issue to
Comment 3 Roland Soos 2017-12-28 11:43:09 UTC
I'm sorry I was on Holiday. Thanks for opening the ticket on Github, I'm following that thread :)