Contact emails jbro...@chromium.org, kenjibah...@chromium.org
Explainer https://github.com/WICG/nav-speculation/blob/main/triggers.md Specification https://wicg.github.io/nav-speculation/speculation-rules.html https://wicg.github.io/nav-speculation/prefetch.html Summary Flexible syntax for defining what outgoing links are eligible to be prepared speculatively before navigation. Enables access to additional enhancements, such as use of a private prefetch proxy, where applicable. This is limited to the "prefetch" action, and does not include "prerender". The Chrome setting (extended preloading) which allows any site to request use of the private prefetch proxy and was previously mentioned on intents for this feature, is currently disabled for policy reasons but can be exposed via Finch as part of a launch, if approved. Blink component Internals>Preload <https://bugs.chromium.org/p/chromium/issues/list?q=component:Internals%3EPreload> TAG review https://github.com/w3ctag/design-reviews/issues/611 https://github.com/w3ctag/design-reviews/issues/721 TAG review status First is complete, second is pending. Risks Interoperability and Compatibility Gecko: No signal (https://github.com/mozilla/standards-positions/issues/620) WebKit: No signal ( https://lists.webkit.org/pipermail/webkit-dev/2022-March/032158.html) Web developers: Some positive signal from a developer using the feature, and from a developer operating a site that is prefetched using this feature. 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? Debuggability Limited, though fixing crbug.com/1315706 should provide basic insight and I'm not aware of anything that would preclude us from adding more sophisticated developer tools integration in the future. Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md> ? Tests are being landed at speculation-rules/prefetch/ in the WPT directory. We are continuing to work on adding more, though coverage in some areas will require the completion of some ongoing refactoring and additional test integration. Flag name The origin trial name is SpeculationRulesPrefetch. Some code internally calls this SpeculationRulesPrefetchProxy, but is not limited to proxied prefetches exclusively. Requires code in //chrome? Some code exists in chrome/, but refactoring work is underway to migrate as much of this as reasonable to content/. Some code specific to, e.g., the specific Google proxy service, will remain in chrome/. Tracking bug https://bugs.chromium.org/p/chromium/issues/detail?id=1173646 Estimated milestones M103 (Android) Since the current origin trial ends after M101, we would like to extend the experiment until shipping and request a gapless launch. I believe a gapless launch is justified here. The speculation rules API has been used by developers as part of this launch and the prerendering experiment <https://groups.google.com/a/chromium.org/g/blink-dev/c/Kpp6uJJRrqI/m/GTo_aF0qEQAJ>. There is an ongoing early access program <https://github.com/buettner/private-prefetch-proxy/issues/15> for publishers to opt in to receiving IP-obscured traffic enabled by this feature, and have received positive feedback about this program – which is planned to launch by default in coordination with this web platform side launch. Enforcing a gap here would interrupt this and require the private prefetch proxy team to notify affected partners (who are receiving prefetch traffic, rather than being direct users of this API), for no known benefit in this case. Shipping on desktop is not possible at this point due to extensions. We expect to file a separate Intent to Ship in the future. Link to entry on the Chrome Platform Status https://chromestatus.com/feature/5740655424831488 Links to previous Intent discussions Intent to prototype: https://groups.google.com/a/chromium.org/g/blink-dev/c/1q7Fp3zpjgQ Intent to Experiment: https://groups.google.com/a/chromium.org/g/blink-dev/c/Cw-hOjT47qI/m/EObn9-4MAgAJ Intent to Extend Experiment: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CACuR13cKaJB%3D2GQS4N3om1eSmuCVOY5zXchRCV8oCYkcq8kH0g%40mail.gmail.com <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CACuR13cKaJB=2gqs4n3om1esmucvoy5zxchrcv8ocykcq8k...@mail.gmail.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. To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+unsubscr...@chromium.org. To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CACuR13cbVXw9nEo4zVwhGz_W65kfg0neYDqW3sMQC%2BYNzX6kfg%40mail.gmail.com.
