Contact emails
[email protected], [email protected]

Explainer
https://github.com/WICG/declarative-partial-updates/blob/main/route-matching-explainer.md#link-matching


Specification
https://drafts.csswg.org/css-navigation-1/#navigation-source-pseudo-class


Summary
Selects the element that initiated the navigation, whether it's a 
link/button/form. The element stays selected throughout the navigation.


Blink component
Blink>CSS


Web Feature ID
Missing feature


Motivation
The main motivation for this comes from view transitions. This gives author a 
way to visually indicate a relationship between the navigation source 
(form/button) and the process of the navigation, eg expanding a thumbnail using 
an animation.


Initial public proposal
https://github.com/w3c/csswg-drafts/issues/11801


TAG review
No information provided


TAG review status
Pending


Goals for experimentation
None


Risks




Interoperability and Compatibility
No information provided

Gecko: No signal (https://github.com/mozilla/standards-positions/issues/1447)

WebKit: No signal (https://github.com/WebKit/standards-positions/issues/715)

Web developers: Strongly positive (https://adactio.com/links/22686) “I really, 
really, really like this proposal! This would absolutely turbo-charge 
cross-document view transitions with nary a line of JavaScript in sight.” (This 
is a view on the entire CSS Navigation Matching spec in total, not 
`:navigation-source` individually)

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?
No information provided



Debuggability
No information provided


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?
Yes
css/css-navigation/tentative/navigation-source-*.html


Flag name on about://flags
No information provided


Finch feature name
NavigationSourcePseudoClass


Rollout plan
Will ship enabled for all users


Requires code in //chrome?
False


Tracking bug
https://issues.chromium.org/issues/530210946


Estimated milestones


Shipping on desktop 156

Shipping on Android 156

Shipping on WebView 156




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/6327898878377984?gate=6247925882683392


This intent message was generated by Chrome Platform Status.

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