[css-animations-1] Interaction of display:none parent with svg:use.

[george-steel]

Should CSS animations be canceled/not started on an element with a display:none ancestor which is made visible through a svg:use element. Currently Chrome will cancel animations if in this case while Firefox will continue/start animations as long as the element is visible.

Test case

[emilio]

This is a bigger issue than that, AIUI.

Chrome doesn't implement the SVG 2 styling rules at all, so what gets styled is the element in the display: none subtree, not the element in the <svg:use> shadow tree (which is the most reasonable thing in this case, I think).

cc @dirkschulze @AmeliaBR

[george-steel]

You're right. This goes a lot deeper than I thought at first. The spec seems much more sensible then blink's current implementation.

[emilio]

You should "just" fix issue 785246 then :)

I even had a WIP at some point for that...

[george-steel]

Looking through the relevant code, that is probably a good idea.