1725177 - ::backdrop with animation does not work

Status: NEW

(Core :: CSS Transitions and Animations, defect)

Description

[Tim Nguyen :ntim]

See http://jsfiddle.net/g6u83rmp

Using animations on backdrops doesn't work

Comment 1

[Emilio Cobos Álvarez (:emilio)]

Why should they work? ::backdrop is a box, not an element / tree-abiding pseudo-element like ::before / ::after / ::marker.

Comment 2

[Emilio Cobos Álvarez (:emilio)]

Err, Brian, do you agree with the above? Or am I missing something?

Comment 3

[Brian Birtles (:birtles, Feb 26~ parental leave)]

(In reply to Emilio Cobos Álvarez (:emilio) from comment #2)

Err, Brian, do you agree with the above? Or am I missing something?

Sorry, I'm completely unfamiliar with ::backdrop but I believe George Steel from Google was working on making all pseudo-elements animatable in Blink over in https://github.com/w3c/csswg-drafts/issues/4502

Comment 5

[Emilio Cobos Álvarez (:emilio)]

Now that animation storage is a bit better defined in bug 1807003, this might be more easily fixable? https://searchfox.org/mozilla-central/rev/e9b8c73771d0038214c69f17c5934ba8ae049799/dom/animation/ElementAnimationData.h#101-105