At the moment it appears the spec is not complete, as a possibly-large
chunk of behavior (regarding request/response reuse that modifies the
behavior of fetch() inside service worker fetch handlers) needs to have its
spec written:
https://github.com/yoshisatoyanagisawa/ServiceWorker/pull/10/files#r1483835014

On Wed, Feb 14, 2024 at 10:39 AM Yoshisato Yanagisawa <
yyanagis...@chromium.org> wrote:

> Do you have any other questions? concerns? comments?
> There were many Intent to Ship/Experiment emails at the same time, and I
> am afraid this mail thread was overlooked.
>
>
> 2024年2月9日(金) 14:20 Yoshisato Yanagisawa <yyanagis...@chromium.org>:
>
>>
>>
>> 2024年2月9日(金) 13:20 Vladimir Levin <vmp...@chromium.org>:
>>
>>>
>>>
>>> On Thu, Feb 8, 2024, 22:56 Yoshisato Yanagisawa <
>>> yyanagis...@chromium.org> wrote:
>>>
>>>> Contact emails
>>>>
>>>> yyanagis...@chromium.org, sisidov...@chromium.org
>>>>
>>>> Explainer
>>>>
>>>> https://github.com/WICG/service-worker-static-routing-api
>>>>
>>>> Specification
>>>>
>>>> https://github.com/w3c/ServiceWorker/pull/1701
>>>>
>>>> Summary
>>>>
>>>> This API allows developers to configure the routing, and allows them to
>>>> offload simple things ServiceWorkers do.  If the condition matches, the
>>>> navigation happens without starting ServiceWorkers or executing JavaScript,
>>>> which allows web pages to avoid performance penalties due to ServiceWorker
>>>> interceptions.
>>>>
>>>>
>>>> Blink component
>>>>
>>>> Blink>ServiceWorker
>>>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EServiceWorker>
>>>>
>>>> TAG review
>>>>
>>>> https://github.com/w3ctag/design-reviews/issues/863
>>>>
>>>> TAG review status
>>>>
>>>> Issues addressed
>>>>
>>>> Chromium Trial Name
>>>>
>>>> ServiceWorkerStaticRouter
>>>>
>>>> Link to origin trial feedback summary
>>>>
>>>>
>>>> https://docs.google.com/document/d/1mE3tngHQdz0s66Z_iIGksFxQui3taogP8pDafLUHMEg/edit#heading=h.ia9i7k1ocjnq
>>>>
>>>
>>> I just want to say that it's heartening to see OT feedback being taken
>>> seriously and addressed in rigorous manner.
>>>
>>
>> Thank you.
>>
>>
>>>
>>>>
>>>> Origin Trial documentation link
>>>>
>>>>
>>>> https://github.com/WICG/service-worker-static-routing-api?tab=readme-ov-file#origin-trial
>>>>
>>>> Risks
>>>>
>>>> Interoperability and Compatibility
>>>>
>>>> Gecko: Positive (
>>>> https://github.com/mozilla/standards-positions/issues/828)
>>>>
>>>> WebKit: No signal (
>>>> https://github.com/WebKit/standards-positions/issues/206) Informal
>>>> positive signals at TPAC, but no official standards position.
>>>>
>>>
>>> It seems like the only concerns with this proposal (in TAG and
>>> elsewhere) was the status of URLPattern in the spec, but that has been
>>> since resolved. Is this your understanding as well?
>>>
>>>
>> Yes.  I think we are on the same page.
>> As I have left a comment in the WebKit link, URLPattern has already
>> become the standard, and is actively maintained.
>>
>>
>>>
>>>> Web developers: Positive (
>>>> https://github.com/w3c/ServiceWorker/issues/1373) We see many positive
>>>> signals and feedback from developers on the Github issue and other places
>>>> (e.g.
>>>> https://jakearchibald.com/2019/service-worker-declarative-router/#disqus_thread).
>>>> Also, we have partners who participated in the OT (feedback
>>>> <https://docs.google.com/document/d/1mE3tngHQdz0s66Z_iIGksFxQui3taogP8pDafLUHMEg/edit#heading=h.ia9i7k1ocjnq>
>>>> ).
>>>>
>>>> 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?
>>>>
>>>> Authors don’t foresee any obvious issue with WebView. WebView supports
>>>> ServiceWorkers, and any existing applications would not be affected unless
>>>> they opt-in to the static routing API explicitly.
>>>>
>>>>
>>>> Debuggability
>>>>
>>>> The registered router rules are visible via
>>>> chrome://serviceworker-internals and the DevTools application panel.  The
>>>> matched rule can be seen in the size field of the DevTools network panel.
>>>>
>>>>
>>>> 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/service-workers/service-worker/tentative/static-router?label=master&label=experimental&aligned
>>>>
>>>>
>>>> https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/web_tests/external/wpt/service-workers/service-worker/tentative/static-router/?q=service-workers%2Fservice-worker%2Ftentative%2Fstatic-router
>>>>
>>>>
>>>> Flag name on chrome://flags
>>>>
>>>> #service-worker-static-router
>>>>
>>>> Finch feature name
>>>>
>>>> ServiceWorkerStaticRouter
>>>>
>>>> Requires code in //chrome?
>>>>
>>>> False
>>>>
>>>> Tracking bug
>>>>
>>>> https://bugs.chromium.org/p/chromium/issues/detail?id=1371756
>>>>
>>>> Launch bug
>>>>
>>>> https://launch.corp.google.com/launch/4261120
>>>>
>>>> Measurement
>>>>
>>>> The number of partners who started to use the API in their production.
>>>> UKM's LCP and the partner's business metrics. UseCounter:
>>>> ServiceWorkerStaticRouter_AddRoutes and ServiceWorkerStaticRouter_Evaluate
>>>>
>>>> Availability expectation
>>>>
>>>> Feature will eventually be available on Web Platform mainline. The
>>>> URLPattern became the standard, and currently no concerns exist.
>>>>
>>>> Adoption expectation
>>>>
>>>> Feature is considered as a best practice to mitigate the ServiceWorker
>>>> performance issue on its cold start. Several internal/external partners
>>>> have already started trying the feature during the OT, and some of them see
>>>> performance improvement. They are expected to use the feature within 12
>>>> months of launch in Chrome.
>>>>
>>>> Adoption plan
>>>>
>>>> We have already started the incubation process with several partners.
>>>> We intend to move them forward to help them launch. By using the results as
>>>> case studies, we intend to expand usage by helping libraries support the
>>>> API.
>>>>
>>>> Non-OSS dependencies
>>>>
>>>> Does the feature depend on any code or APIs outside the Chromium open
>>>> source repository and its open-source dependencies to function?
>>>>
>>>> n/a
>>>>
>>>> Estimated milestones
>>>>
>>>> Shipping on desktop
>>>>
>>>> 123
>>>>
>>>> OriginTrial desktop last
>>>>
>>>> 121
>>>>
>>>> OriginTrial desktop first
>>>>
>>>> 116
>>>>
>>>> Shipping on Android
>>>>
>>>> 123
>>>>
>>>> OriginTrial Android last
>>>>
>>>> 121
>>>>
>>>> OriginTrial Android first
>>>>
>>>> 116
>>>>
>>>> OriginTrial webView last
>>>>
>>>> 121
>>>>
>>>> OriginTrial webView first
>>>>
>>>> 116
>>>>
>>>>
>>>>
>>>> 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).
>>>>
>>>> Limit the size of rules.
>>>>
>>>> https://github.com/WICG/service-worker-static-routing-api/issues/5
>>>>
>>>> https://github.com/WICG/service-worker-static-routing-api/issues/6
>>>>
>>>> If the limit is large enough to cover the relevant usages, it should
>>>> not be a source of issues.
>>>>
>>>> Timing Info
>>>>
>>>> https://github.com/WICG/service-worker-static-routing-api/issues/19
>>>>
>>>> The timing info for the API will be decided in a backward-compatible
>>>> way.  It should not be a source of issues.
>>>>
>>>> Making subsequent subresource request uses the navigation request’s
>>>> source
>>>>
>>>> https://github.com/WICG/service-worker-static-routing-api/issues/7
>>>>
>>>> This can be implemented as another condition, and should not break
>>>> backward compatibility.
>>>>
>>>>
>>>> https://github.com/WICG/service-worker-static-routing-api/blob/main/final-form.md
>>>>
>>>> tells conditions and sources that can be added in the future.  The time
>>>> condition and conditional syntaxes are not implemented yet.  Also, some
>>>> sources are considered to have fields.  However, they should come as new
>>>> conditions / sources, it should not break backward compatibility.
>>>>
>>>>
>>>> Link to entry on the Chrome Platform Status
>>>>
>>>> https://chromestatus.com/feature/5185352976826368
>>>>
>>>> Links to previous Intent discussions
>>>>
>>>> Intent to prototype:
>>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/fyvsde2ay2A/m/RH9E8hB0AgAJ
>>>> Intent to Experiment:
>>>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAGMyg-abNsH2mfBw3%2BiaJgMn3SKCEzBzw0FuMudbmQ9XhkjEVg%40mail.gmail.com
>>>>
>>>> Intent to Extend Experiment:
>>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/gTy-fpBOXDM
>>>>
>>>> Intent to Ship:
>>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/gTy-fpBOXDM
>>>>
>>>>
>>>> This intent message was generated by Chrome Platform Status
>>>> <https://chromestatus.com/>.
>>>>
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>>>> .
>>>>
>>> --
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