On Wednesday, June 25, 2025 at 11:28:33 AM UTC-4 Alex Russell wrote:

LGTM2. Is there good documentation (e.g. in MDN) about which properties are 
inherited and from where? And how do CSS custom properties inherit in this 
parallel tree?


Custom properties don't have any special treatment in this tree, so :root, 
which is the originating element can specify the custom props for this 
tree. I don't think there's currently good documentation. CSSWG is still 
working to resolve on further properties to be inherited through this (like 
timing function). When all of the obvious items are resolved on, I can take 
on an action item to ensure documentation is updated.

Thanks!
Vlad
 


On Wednesday, June 25, 2025 at 8:22:11 AM UTC-7 Chris Harrelson wrote:

LGTM1

On Tue, Jun 24, 2025 at 6:23 PM Chromestatus <admin@cr-status.appspotmail.c
om> wrote:

Contact emails vmp...@chromium.org 

Explainer None 

Specification https://www.w3.org/TR/css-view-transitions-2 

Summary 

View Transitions project adds a tree of pseudo elements that have various 
animations applied to them. For ease of development and customization some 
niceties are provided, such as inheriting animation-duration. This feature 
adds another nicety: inherit animation-delay.


Blink component Blink>ViewTransitions 
<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EViewTransitions%22>
 

TAG review None 

TAG review status Not applicable 

Risks 


Interoperability and Compatibility 

There's a small risk that developers rely on this properly not being 
inherited into the new/old pseudo elements from the group. However, it's 
unlikely since the animations are designed to work in unison. This is the 
reason for inheriting animation-duration, for example. This, and the fact 
that both Safari and Firefox are shipping this behavior makes me confident 
that the risk is minimal.


*Gecko*: Shipped/Shipping (https://github.com/w3c/csswg-
drafts/issues/9817#issuecomment-2994352828) 

*WebKit*: Shipped/Shipping (https://github.com/w3c/csswg-
drafts/issues/9817#issuecomment-2994352828) 

*Web developers*: No signals 

*Other signals*: 

WebView application risks 

Does this intent deprecate or change behavior of existing APIs, such that 
it has potentially high risk for Android WebView-based applications?

None


Debuggability 

None


Will this feature be supported on all six Blink platforms (Windows, Mac, 
Linux, ChromeOS, Android, and Android WebView)? Yes 

Is this feature fully tested by web-platform-tests 
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
? Yes 

https://wpt.fyi/results/css/css-view-transitions/style-inher
itance.html?label=master&label=experimental&aligned (WebKit recently added 
animation-delay subtest which may not have been included in the results yet)


Flag name on about://flags None 

Finch feature name ViewTransitionAnimationDelayInherit 

Rollout plan Will ship enabled for all users 

Requires code in //chrome? False 

Estimated milestones Shipping on desktop 140 Shipping on Android 140 Shipping 
on WebView 140 

Anticipated spec changes 

Open questions about a feature may be a source of future web compat or 
interop issues. Please list open issues (e.g. links to known github issues 
in the project for the feature specification) whose resolution may 
introduce web compat/interop risk (e.g., changing to naming or structure of 
the API in a non-backward-compatible way).
None 

Link to entry on the Chrome Platform Status https://chromestatus.com/featu
re/5424291457531904?gate=5271493935890432 

This intent message was generated by Chrome Platform Status 
<https://chromestatus.com>. 

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