Please file an issue with the TAG as an FYI and let us know when they respond. Their job is to help us drive coherence across the platform and spot architectural patterns. There might be other occurances of similar oversights that they can help us spot and fix.
Best, Alex On Tuesday, March 28, 2023 at 11:15:31 AM UTC-7 Ari Chivukula wrote: > Contact emails > > aric...@chromium.org, miketa...@chromium.org, yoavwe...@chromium.org > > Specification > > https://github.com/w3c/navigation-timing/pull/188 > > Summary > > Websites can indicate that a particular Client Hint > <https://wicg.github.io/client-hints-infrastructure/> is critical to the > page by including it in a `Critical-CH` HTTP response header. Doing so will > trigger a connection restart if the hint listed in the `Critical-CH` HTTP > response header could be (but wasn’t) included in the HTTP request > initially sent. This intent proposes adding `readonly attribute > DOMHighResTimeStamp criticalCHRestart;` to the > `PerformanceNavigationTiming` interface. > > > Blink component > > Blink>PerformanceAPIs>NavigationTiming > <https://bugs.chromium.org/p/chromium/issues/list?q=component%3ABlink%3EPerformanceAPIs%3ENavigationTiming> > > Motivation > > It’s possible for websites to observe a change in the Navigation Timing > <https://github.com/w3c/navigation-timing> related to `responseStart` and > `requestStart`, but there is no explicit timestamp that indicates when this > occurred. Without that it’s harder for sites to detect the impact that the > `Critical-CH` > HTTP response header has on connections. Developers (including Akamai) are > interested in using this to better understand the impact of User Agent > Client Hints / User Agent Reduction. > > `criticalCHRestart` can only be set for top-level frames, as subresources > and iframes ignore `Critical-CH` HTTP response headers. > > TAG review > > N/A, this is a small, incremental addition to an existing feature for > convenience and the loaded website has other (less convenient) ways to > detect a Critical-CH restart. > > > Compatibility & Interoperability > > We would be the first to implement if approved. > > > Gecko: https://github.com/mozilla/standards-positions/issues/767 > > > WebKit: https://github.com/WebKit/standards-positions/issues/156 > > > Web Developers: Requested by Akamai > <https://github.com/w3c/navigation-timing/issues/177> > > Is this feature fully tested by web-platform-tests? > > No, but it will be. > > Tracking bug > > https://crbug.com/1425910 > > Link to entry on the Chrome Platform Status > > https://chromestatus.com/feature/5140317616996352 > > -- 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/a6c272ec-57b0-4f2e-8cd6-e353edc546efn%40chromium.org.
