Contact emails
[email protected]

Specification
https://github.com/w3c/csswg-drafts/issues/12116


Summary
View Transition feature uses a pseudo sub-tree of the element, with 
::view-transition being the root of that transition. Previously 
::view-transition element was specified to have a position: fixed. CSSWG made a 
decision to make this instead position: absolute. In effect, this should not be 
noticeable since this element's containing block remains the snapshot 
containing block in either absolute or fixed case. The only noticeable change 
is a change in getComputedStyle.


Blink component
Blink>ViewTransitions


Web Feature ID
view-transitions


TAG review
None


TAG review status
Not applicable


Risks




Interoperability and Compatibility
None

Gecko: Shipped/Shipping 
(https://wpt.fyi/results/css/css-view-transitions/pseudo-get-computed-style.html)

WebKit: No signal

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?
Yeshttps://wpt.fyi/results/css/css-view-transitions/pseudo-get-computed-style.html


Flag name on about://flags
None


Finch feature name
None


Non-finch justification
This is changing a value that has no behavior effect other than 
getComputedStyle in the UA style sheet, which is hard to flag guard and may not 
be worth the effort for this change.


Rollout plan
Will ship enabled for all users


Requires code in //chrome?
False


Tracking bug
https://issues.chromium.org/439800102


Estimated milestones


Shipping on desktop 142

Shipping on Android 142

Shipping on WebView 142




Anticipated spec changes

Open questions about a feature may be a source of future web compat or interop 
issues. Please list open issues (eg links to known github issues in the project 
for the feature specification) whose resolution may introduce web 
compat/interop risk (eg, 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/feature/6155213736116224?gate=5383321127354368


This intent message was generated by Chrome Platform Status.

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