Note that the spec has been discussed in the WHATUP at TPAC 2025, and got positive feedback. Please see: https://www.w3.org/2025/11/11-whatwg-minutes.html
2026年1月21日(水) 12:22 Chromestatus <[email protected]>: > *Contact emails* > [email protected], [email protected] > > *Explainer* > > https://gist.github.com/domenic/c5bd38339f33b49120ae11b3b4af5b9b#file-1-explainer-md > > *Specification* > *No information provided* > > *Summary* > This adds a new option, `extendedLifetime: true`, to the `SharedWorker` > constructor. This requests that the shared worker be kept alive even after > all current clients have unloaded. The primary use case is to allow pages > to perform asynchronous work that requires JavaScript after a page unloads, > without needing to rely on a service worker. > > *Blink component* > Blink>Workers > <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EWorkers%22> > > *Web Feature ID* > shared-workers <https://webstatus.dev/features/shared-workers> > > *TAG review* > https://github.com/w3ctag/design-reviews/issues/1089 > > *TAG review status* > Pending > > *Origin Trial Name* > Extended lifetime shared workers > > *Chromium Trial Name* > SharedWorkerExtendedLifetime > > *Origin Trial documentation link* > > https://gist.github.com/domenic/c5bd38339f33b49120ae11b3b4af5b9b#file-1-explainer-md > > *WebFeature UseCounter name* > kSharedWorkerExtendedLifetimeFeatureEnabled > > *Risks* > > > *Interoperability and Compatibility* > We intend to specify that the lifetime timeout for these shared workers be > extended in the same way as service workers. Because the exact timeout of > service workers is left implementation-defined, it's possible that code > using this new feature could be non-interoperable. However, this has so far > not proved to be a major problem in practice for service workers. > > *Gecko*: Positive ( > https://github.com/mozilla/standards-positions/issues/1227) Some > unofficial tentative positive signals and engagement in the proposal issue. > > *WebKit*: No signal ( > https://github.com/WebKit/standards-positions/issues/492) Some unofficial > tentative negative signals in the proposal issue. > > *Web developers*: Positive The problem of wanting to perform asynchronous > work during unload is well-known, with the service worker workaround > currently deployed, including by Google properties. > > *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* > > > *Goals for experimentation* > *No information provided* > > *Reason this experiment is being extended* > Developer participation in the Origin Trial has increased significantly, > with most of the growth occurring since mid-September. As this momentum is > recent, an extension is needed to allow developers sufficient time to > conduct thorough experiments and to provide us with more comprehensive > usage data and insights. To aid developers in their experimentation, we > have also improved debuggability. The chrome://inspect/#workers page now > indicates when a SharedWorker is using the extendedLifetime option. > Separately, the standardization process is progressing well. The > corresponding pull request to the WHATWG HTML specification ( > https://github.com/whatwg/html/pull/11600) is under review and has > received positive signals, including an LGTM from Mozilla. Extending the > trial will allow this real-world testing to continue while the > specification solidifies. > > *Reason this experiment is being extended* > A major partner is about to start a large-scale experiment. We believe > that extending the trial to cover their experiment window is crucial, as it > will provide us with essential performance metrics and stability data at > scale. This extension will prevent any service disruption for the partner > and ensure we have sufficient evidence to support the final launch. > > *Ongoing technical constraints* > *No information provided* > > *Debuggability* > The chrome://inspect/#workers page indicates when a SharedWorker is using > the extendedLifetime option. > > *Will this feature be supported on all six Blink platforms (Windows, Mac, > Linux, ChromeOS, Android, and Android WebView)?* > No > Shared workers are not yet supported on Android and Android WebView. > However, we are concurrently working on enabling them there, and when we > do, this feature will also be supported. > > *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/workers/tentative/SharedWorker-extendedLifetime.html > > *Flag name on about://flags* > *No information provided* > > *Finch feature name* > SharedWorkerExtendedLifetime > > *Requires code in //chrome?* > False > > *Tracking bug* > https://issues.chromium.org/issues/400473072 > > *Estimated milestones* > Origin trial desktop first 139 > Origin trial desktop last 142 > Origin trial extension 1 end milestone 145 > Origin trial extension 2 end milestone 148 > > *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). > We are currently discussing some details in preparation for specification. > The exact nature of how the lifetime extension works with regard to > non-window clients, particularly, has only recently reached a tentative > conclusion. > > *Link to entry on the Chrome Platform Status* > https://chromestatus.com/feature/5138641357373440?gate=6195414653075456 > > *Links to previous Intent discussions* > Intent to Experiment: > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/6862683f.170a0220.16d1bf.0122.GAE%40google.com > Intent to Extend Experiment 1: > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/68de2b1f.050a0220.58465.05c2.GAE%40google.com > > > This intent message was generated by Chrome Platform Status > <https://chromestatus.com>. > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. 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