LGTM to extend to Jan 4.

On Mon, Oct 25, 2021 at 9:11 AM Khushal Sagar <[email protected]>
wrote:

> Hello API-OWNERS,
>
> We want to request an extension to the end date of this OT from December
> 14 (current
> <https://developer.chrome.com/origintrials/#/view_trial/451485862643892225>)
> to Jan 4. An engaged partner is running field experiments and they can use
> the extension to collect more data. The end milestone is still the same
> (M96), the new date aligns with the stable release of the next milestone.
>
> Please let me know if this requires a new Intent or if we could get a
> quick LGTM here.
>
> Thanks.
> Khushal
>
> On Tue, Sep 7, 2021 at 11:20 AM Vladimir Levin <[email protected]>
> wrote:
>
>>
>>
>> On Tue, Sep 7, 2021 at 10:33 AM Arthur Sonzogni <
>> [email protected]> wrote:
>>
>>> Hi Vladimir,
>>> Could you confirm this is a continuation of the OriginTrial supporting
>>> only Single-Page transitions? We weren't sure by reading this intent.
>>> Arthur @arthursonzogni
>>>
>>
>> Yes, I can confirm that this is a request for continuation of OT for
>> Single-Page App transition API only.  We intend to file a separate origin
>> trial request, if needed, for any version of the API that includes the
>> Multi-Page transitions.
>>
>> Thanks!
>> Vlad
>>
>>
>>>
>>> Le mer. 1 sept. 2021 à 16:33, Yoav Weiss <[email protected]> a
>>> écrit :
>>>
>>>> *LGTM* to extend the experiment till M96 (inclusive)
>>>>
>>>> On Mon, Aug 30, 2021 at 7:09 PM Vladimir Levin <[email protected]>
>>>> wrote:
>>>>
>>>>> Contact [email protected], [email protected],
>>>>> [email protected], [email protected]
>>>>>
>>>>> Explainer
>>>>> https://github.com/vmpstr/shared-element-transitions/blob/main/README.md
>>>>>
>>>>> Summary
>>>>>
>>>>> Shared Element Transitions is a proposal for a new script API that
>>>>> allows a simple set of transitions in both Single-Page Applications (SPAs)
>>>>> and Multi-Page Applications (MPAs). This feature enhances the visual 
>>>>> polish
>>>>> of pages without requiring a large development effort from developers to
>>>>> make transitions look nice. By selecting from a set of user-agent
>>>>> implemented transition effects, the developers can achieve a polished
>>>>> transition look with minimal effort.
>>>>>
>>>>>
>>>>> Blink componentBlink>Animation
>>>>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EAnimation>
>>>>>
>>>>> TAG reviewhttps://github.com/w3ctag/design-reviews/issues/631
>>>>>
>>>>> TAG review statusPending
>>>>>
>>>>> Risks
>>>>>
>>>>>
>>>>> Interoperability and Compatibility
>>>>>
>>>>> Low. As a new feature, the risk here is that other browsers do not
>>>>> implement it, but since this is a progressive enhancement, sites should be
>>>>> able to drop usage of the feature easily in browsers where it is not
>>>>> supported.
>>>>>
>>>>>
>>>>> Gecko: No signal
>>>>>
>>>>> WebKit: No signal
>>>>>
>>>>> Web developers: Positive Interest in the feature:
>>>>> https://twitter.com/jaffathecake/status/1386673316354797570 Main
>>>>> feedback is requests to provide more customizability and power:
>>>>> https://github.com/WICG/shared-element-transitions/issues/28
>>>>> https://github.com/WICG/shared-element-transitions/issues/9
>>>>>
>>>>> Ergonomics
>>>>>
>>>>> None.
>>>>>
>>>>>
>>>>> Activation
>>>>>
>>>>> Low. As with interop/compat risks, the difficulty stems from this
>>>>> being a new feature without support in other browsers. A polyfill for the
>>>>> SPA case would be beneficial, but it will not be possible to polyfill MPA
>>>>> behavior. That said, dropping the customized transition should not impact
>>>>> the usability of a site, fundamentally, so this can easily be dropped on
>>>>> browsers that do not support the feature.
>>>>>
>>>>>
>>>>> Security
>>>>>
>>>>> The current implementation handles transitions in Viz in anticipation
>>>>> of MPA scenarios. More details on this are outlined in the design doc. See
>>>>> also the security and privacy self-review questionnaire that was completed
>>>>> as part of the TAG review process:
>>>>> https://github.com/WICG/shared-element-transitions/blob/main/security-privacy-questionnaire.md
>>>>>
>>>>>
>>>>> Goals for experimentation
>>>>>
>>>>> The API shape is currently limited, providing only a stock set of
>>>>> transition types. We've already seen engagement on the WICG and a desire
>>>>> for more customization (see web developer response). We hope to learn more
>>>>> about the utility of the default transition types and experiences partners
>>>>> would like to create, but are unable to achieve with the limited API (we
>>>>> have two external partners who have indicated interest). Based on that
>>>>> feedback, we may make changes to the API to add more customization. We 
>>>>> also
>>>>> want to know how easy it is to adopt this API on an existing site.
>>>>>
>>>>>
>>>>> Reason this experiment is being extended
>>>>>
>>>>> We have gathered feedback from partners, but some amendments to the
>>>>> feature are needed in order for them to utilize the feature. Specifically,
>>>>> easing function, duration, and delay controls for shared elements is 
>>>>> needed
>>>>> to better animation control. We are working on adding the controls and
>>>>> would like to extend the experiment. Original experiment start date: M92
>>>>> Original experiment end date: M94 Proposed new end date: M96
>>>>>
>>>>>
>>>>> Ongoing technical constraints
>>>>>
>>>>> None.
>>>>>
>>>>>
>>>>> Debuggability
>>>>>
>>>>> It is possible to set breakpoints inside post-preparation and
>>>>> post-transition handlers, but beyond this there is no way, presently, to
>>>>> debug an unexpected transition. Specifically, there currently is no way to
>>>>> scrub through a transition, or to inspect the shared/transitioned 
>>>>> elements.
>>>>> These are potential areas for improvement if we get developer feedback 
>>>>> that
>>>>> these would be helpful.
>>>>>
>>>>>
>>>>> Will this feature be supported on all six Blink platforms (Windows,
>>>>> Mac, Linux, Chrome OS, Android, and Android WebView)?No
>>>>>
>>>>> Currently no support for Android WebView. WebView presents challenges
>>>>> due to its rendering architecture.
>>>>>
>>>>>
>>>>> Is this feature fully tested by web-platform-tests
>>>>> <https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md>
>>>>> ?No
>>>>>
>>>>> Flag nameDocumentTransition
>>>>>
>>>>> Requires code in //chrome?False
>>>>>
>>>>> Tracking bug
>>>>> https://bugs.chromium.org/p/chromium/issues/detail?id=1150461
>>>>>
>>>>> Estimated milestones
>>>>> OriginTrial desktop first 92
>>>>> OriginTrial desktop last 96
>>>>> OriginTrial android first 92
>>>>> OriginTrial android last 96
>>>>>
>>>>> Link to entry on the Chrome Platform Status
>>>>> https://chromestatus.com/feature/5193009714954240
>>>>>
>>>>> Links to previous Intent discussionsIntent to prototype:
>>>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/7SMI3IklO4g/m/JS-JojxNAwAJ
>>>>> Intent to Experiment:
>>>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/UgZAAElUWzU
>>>>>
>>>>>
>>>>> This intent message was generated by Chrome Platform Status
>>>>> <https://www.chromestatus.com/>.
>>>>>
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