LGTM2 On Tue, Feb 1, 2022 at 1:27 PM Domenic Denicola <dome...@chromium.org> wrote:
> > > On Tue, Feb 1, 2022 at 11:24 AM Mike Taylor <miketa...@chromium.org> > wrote: > >> *Contact emails* >> >> >> >> * miketa...@chromium.org <miketa...@chromium.org>, abe...@chromium.org >> <abe...@chromium.org>, jadekess...@chromium.org <jadekess...@chromium.org> >> Explainer >> https://github.com/WICG/ua-client-hints#explainer-reducing-user-agent-granularity >> <https://github.com/WICG/ua-client-hints#explainer-reducing-user-agent-granularity> >> Specification https://www.chromium.org/updates/ua-reduction >> <https://www.chromium.org/updates/ua-reduction> is the closest thing that >> specifies Chrome’s UA Reduction plans today. As these changes land in >> Chromium, the Compat Standard <https://compat.spec.whatwg.org/> will be >> updated to reflect them (in the newly landed UA String section >> <https://compat.spec.whatwg.org/#ua-string-section>).* >> > > I want to call out that this is some really great work. For years specs > have basically said "use an implementation-defined value", but we knew that > was not sufficient for web compatibility, and it was not useful to web > developers or implementers. Years ago we started to capture some > interesting constraints in HTML's definition of navigator compatibility > mode <https://html.spec.whatwg.org/#concept-navigator-compatibility-mode>, > but we knew there were many more. > > The work Mike has done has started to address this long-standing issue of > spec tech debt, and it's really great that he's put in the extra work here > instead of just taking advantage of the spec's historical looseness. > > I did a quick review on the spec and found some minor issues and clarity > improvement suggestions > <https://github.com/whatwg/compat/issues/created_by/domenic>, but overall > this is a great foundation and gives me confidence others can both follow > along with our plans, and implement compatible software based on them. > > >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> * Summary As previously detailed on the Chromium Blog >> <https://blog.chromium.org/2021/09/user-agent-reduction-origin-trial-and-dates.html>, >> we intend to proceed with Phase 4 of the User-Agent Reduction plan. In >> Phase 4, the MINOR.BUILD.PATCH version numbers are reduced to "0.0.0". For >> use cases requiring high-entropy full version information, developers are >> encouraged to migrate to the User Agent Client Hints API >> <https://web.dev/migrate-to-ua-ch/>, in particular the >> Sec-CH-UA-Full-Version-List >> <https://wicg.github.io/ua-client-hints/#sec-ch-ua-full-version-list> hint. >> Blink component Blink >> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink> TAG >> review https://github.com/w3ctag/design-reviews/issues/640 >> <https://github.com/w3ctag/design-reviews/issues/640> TAG review status >> Issues addressed Risks Interoperability and Compatibility Any time you >> modify the User-Agent string there is a risk of some content somewhere >> depending on the previous format. There should not be interop risks, as >> each browser sends its own User-Agent string. But there is a risk that >> content somewhere is relying on “non-zero” MINOR, BUILD, or PATCH >> information. My personal view is that the risk is low compared to the rest >> of the changes to come in later phases. But in order to mitigate the risk >> of this change, we intend to slowly roll it out via Finch and observe >> health metrics (i.e., HTTP 4XX and 5XX error codes, etc.) and bug reports >> from the community. We've surveyed dozens of User-Agent parsing libraries, >> and as far as we know "0.0.0" will not create a problem syntactically. But >> the web can get pretty weird in ways we don't anticipate, hence the slow >> roll-out and incremental path towards User-Agent Reduction. Gecko: >> Shipped/Shipping. Firefox has frozen (or capped) much of their UA string >> already. WebKit: Shipped/Shipping. Safari has already frozen everything in >> their UA string except for version number info. Web developers: Mixed >> signals. Reactions have ranged from positive to indifferent to negative, >> from various channels. Debuggability No special DevTools support needed. Is >> this feature fully tested by web-platform-tests >> <https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md>? >> No Flag name reduce-user-agent Requires code in //chrome? False Tracking >> bug https://bugs.chromium.org/p/chromium/issues/detail?id=1282229 >> <https://bugs.chromium.org/p/chromium/issues/detail?id=1282229> Launch bug >> https://bugs.chromium.org/p/chromium/issues/detail?id=1282238 >> <https://bugs.chromium.org/p/chromium/issues/detail?id=1282238> Estimated >> milestones We aim to start rollout in M101. We will update this thread once >> the feature is shipping to 100% of the stable population. Link to entry on >> the Chrome Platform Status >> https://chromestatus.com/feature/6311349754789888 >> <https://chromestatus.com/feature/6311349754789888> * >> >> -- >> 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/05b6cf46-7bce-bd03-8a93-0db496a3a26e%40chromium.org >> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/05b6cf46-7bce-bd03-8a93-0db496a3a26e%40chromium.org?utm_medium=email&utm_source=footer> >> . >> > -- > 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/CAM0wra_K7OF8TLhuWZXq8ROjb%2Bns2hDbPow%2BhFOFKMhc9pvUHQ%40mail.gmail.com > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAM0wra_K7OF8TLhuWZXq8ROjb%2Bns2hDbPow%2BhFOFKMhc9pvUHQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. 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