LGTM2
On 8/16/23 6:38 PM, Chris Harrelson wrote:
LGTM1 to ship once the spec PR has landed.
On Mon, Aug 14, 2023 at 7:50 AM 'Khushal Sagar' via blink-dev
<blink-dev@chromium.org> wrote:
Contact emails
khushalsa...@google.com, liuwill...@google.com, hvanops...@google.com
Explainer
https://github.com/WICG/view-transitions/blob/main/default-ua-transitions.md
Specification
https://github.com/whatwg/html/pull/9579
Summary
Smooth visual transitions as users navigate on the web can lower
cognitive load by helping users stay in context. However, the user
experience is bad if both the site author and the UA add these
transitions: the transitions may conflict and cause confusion for
the user. This API avoids such cases to ensure only one visual
transition is executed at a time. The API adds a boolean on
`PopStateEvent` and `NavigateEvent` to indicate whether the UA has
executed a visual transition for this navigation. Authors can use
this to skip their custom transition.
Blink component
Blink>DefaultNavigationTransitions
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EDefaultNavigationTransitions>
TAG review
https://github.com/w3ctag/design-reviews/issues/834
TAG review status
Issues addressed
Risks
Interoperability and Compatibility
This feature is a progressive enhancement. In the absence of the
feature, the author has to either conservatively assume there is a
UA transition (and not do a custom transition) or risk visual
glitches from double transition. As such there is no interop risk.
/Gecko/: No signal
(https://github.com/mozilla/standards-positions/issues/783)
/WebKit/: Positive
(https://github.com/WebKit/standards-positions/issues/176)
/Web developers/: Strongly positive Issues like this:
https://stackoverflow.com/questions/66867737/iphone-safari-detect-swipe-navigation.
This is likely to happen more as authors can now use
ViewTransitions to add custom transitions in SPAs.
/Other signals/:
Activation
None
Security
None. The API is limited to same-document navigations.
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
Will this feature be supported on all six Blink platforms
(Windows, Mac, Linux, Chrome OS, 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>?
No. WPTs assert that the attribute is present but not the value.
By design, when this is set is left to the UA.
Flag name on chrome://flags
Finch feature name
None
Non-finch justification
None
Requires code in //chrome?
False
Estimated milestones
Shipping on desktop 118
Shipping on Android 118
Shipping on WebView 118
Anticipated spec changes
None
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5204831477694464
Links to previous Intent discussions
Intent to prototype:
https://groups.google.com/a/chromium.org/g/blink-dev/c/UJMYZXoSQ4A/m/OkIvKVtlAAAJ
This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.
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