On Thu, Jul 10, 2025 at 3:08 PM Rick Byers <rby...@chromium.org> wrote:
> Interoperability and Compatibility >> >> Use counters are relatively high: >> https://chromestatus.com/metrics/feature/timeline/popularity/4272 >> However, analysis from Mozilla shows that perhaps the impact is not as >> large as the use counters would suggest: >> https://github.com/whatwg/html/issues/7867#issuecomment-2595987424 >> Firefox has now shipped the complete removal of this behavior for two >> milestones with no reported issues. >> > > I tend to agree this should be low risk. In particular I assume the > "severity of breakage" is very low here (worst case some text is just a bit > bigger) and "ease of mitigation" is very high, right? The accessibility and > interoperability gains make this worth trying and accepting a bit of compat > pain for, but I am a little worried we may find eg. some enterprise / LOB > app which has an unacceptable UI regression. So I'm supportive as long as > we've got a plan to flag off if needed. > Thanks. I think that's right - the change is just different margins and font sizes (by a little) and the fix is to add explicit `font-size` and `margin` CSS rules to get the sizes the site wants. The plan is certainly to have a kill switch in case problems are encountered. I'm leaning heavily on Mozilla's work here - they did some http archive research (showing only minor impact) and they've shipped it and heard crickets. > 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/html/rendering/non-replaced-elements/sections-and-headings >> > > Nice. Do we match Firefox at 100% passing when we ship this? > Yep <https://chromium-review.googlesource.com/c/chromium/src/+/6725454/2/third_party/blink/web_tests/external/wpt/html/rendering/non-replaced-elements/sections-and-headings/headings-styles-no-h1-in-section.tentative-expected.txt> ! > Finch feature nameNone >> > > This needs a kill switch flag, right? Just in case of an emergency web > compat issue? > Yeah, I'm still landing the flag, but I'll update the chromestatus when it's ready. Tentative name (not yet landed) is `SpecialRulesForNestedH1Elements`. Thanks, Mason >> >> Non-finch justificationNone >> >> Rollout planWill ship enabled for all users >> >> Requires code in //chrome?False >> >> Tracking bughttps://issues.chromium.org/issues/394111284 >> >> Estimated milestones >> Shipping on desktop 140 >> DevTrial on desktop 136 >> Shipping on Android 140 >> DevTrial on Android 136 >> Shipping on WebView 140 >> >> 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). >> None >> >> Link to entry on the Chrome Platform Status >> https://chromestatus.com/feature/6192419898654720?gate=4740512881573888 >> >> 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 visit >> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAM%3DNeDga_GXVFf6fjoNQ7Y3w5xDDT5U0m75fGYEgnCEV4B2i%3Dg%40mail.gmail.com >> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAM%3DNeDga_GXVFf6fjoNQ7Y3w5xDDT5U0m75fGYEgnCEV4B2i%3Dg%40mail.gmail.com?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 visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAM%3DNeDgTpB9x7eFjm%3D9bd-fnuQx2SHy30yKD0LK428MJnYdtTQ%40mail.gmail.com.
