API owners,

I think this intent is ready for API owner approvals.

* Domenic's concern was resolved by dropping '<rb>' from the scope of the
intent.
* We found we didn't need to update the HTML specification.
  ** It already asks "display:ruby" and "display:ruby-text" for <ruby> and
<rt>
  ** I wrote "what we should do is to remove algorithms at
https://html.spec.whatwg.org/C/#the-ruby-element:the-ruby-element-19";. But
we don't need to remove them because they are not for rendering purposes.
* WebKit is developing this feature. Firefox already shipped.

On Thu, Oct 19, 2023 at 4:41 PM TAMURA, Kent <tk...@chromium.org> wrote:

> Contact emailstk...@chromium.org
>
> ExplainerNone
>
> Specificationhttps://drafts.csswg.org/css-ruby-1/#ruby-display
>
> Summary
>
> New CSS display property values, "ruby", "ruby-base", and "ruby-text",
> are added. The default display values of <ruby>, <rb> and <rt> are changed
> to them, and ruby layout respects these display values. Web authors can use
> any elements such as <div> to render ruby by setting the new display
> values.
>
>
> Blink componentBlink>Layout>Ruby
> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ELayout%3ERuby>
>
> Search tagscss <https://chromestatus.com/features#tags:css>, ruby
> <https://chromestatus.com/features#tags:ruby>
>
> TAG reviewNone; Firefox already shipped this.
>
> TAG review statusNot applicable
>
> Risks
>
>
> Interoperability and Compatibility
>
> This feature does not affect most <ruby> usages on existing pages.
> However, the rendering results may change if the `display` property value
> of <ruby> or <rt> is set to a non-default value because ruby rendering is
> triggered by the new `display` value, not the tag name.
> https://chromestatus.com/metrics/feature/timeline/popularity/3282 At most
> 0.07% page views might be affected. However, <ruby>s in 9 of the top 10
> sites have no <rt>, and their rendering won't be changed. The remaining 1
> site will be broken, and it's same as Firefox's rendering result. We have a
> plan to show a console message about this incompatibility before enabling
> the feature.
>
>
> *Gecko*: Shipped/Shipping
>
> *WebKit*: Positive (
> https://github.com/WebKit/standards-positions/issues/232)
>
> *Web developers*: No signals
>
> *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?
>
> None
>
>
> Debuggability
>
> Rolling css_properties.json5 into devtools-frontend should be enough.
>
>
> Will this feature be supported on all six Blink platforms (Windows, Mac,
> Linux, Chrome OS, Android, and Android WebView)?Yes
>
> Is this feature fully tested by web-platform-tests
> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
> ?Yes
>
> Some of https://wpt.fyi/results/css/css-ruby and
> https://wpt.fyi/results/css/css-display/parsing
>
>
> Flag name on chrome://flagsNone
>
> Finch feature nameCssDisplayRuby
>
> Requires code in //chrome?False
>
> Tracking bughttps://bugs.chromium.org/p/chromium/issues/detail?id=880802
>
> Estimated milestones
> Shipping on desktop 121
> Shipping on Android 121
> Shipping on WebView 121
>
> 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/6416726833233920
>
> This intent message was generated by Chrome Platform Status
> <https://chromestatus.com/>.
>
> --
> TAMURA Kent
> Software Engineer, Google
>
>
>

-- 
TAMURA Kent
Software Engineer, Google

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