On Tue, Jun 24, 2025 at 1:21 AM Yoav Weiss (@Shopify) <
yoavwe...@chromium.org> wrote:

> Thanks for working on these!!
>
> +Vladimir Levin <vmp...@chromium.org> +Chris Harrelson
> <chris...@chromium.org> - what would it take to add these to the CSSWG
> agenda? (and maybe get eyes on the WPT review)
>

https://github.com/w3c/csswg-drafts/issues/12376 has the Agenda+ label, so
it'll get discussed soon.



>
> On Tue, Jun 24, 2025 at 8:02 AM 'Divyansh Mangal' via blink-dev <
> blink-dev@chromium.org> wrote:
>
>> Hi Dominic, we have incorporated few of the action items that you
>> suggested. Specially the priority ones:
>>
>> I have created a WPT PR to increase the coverage of different values of
>> width and height CSS properties
>> https://github.com/web-platform-tests/wpt/pull/53186.
>>
>> I have also started a CSS issue
>> https://github.com/w3c/csswg-drafts/issues/12376
>> where we are clarifying and getting opinions on what should happen with
>> the undefined values in the SVG specification.
>>
>>
>> On Friday, June 13, 2025 at 10:18:41 PM UTC+5:30 Divyansh Mangal wrote:
>>
>>> Hi Dominic, thanks for your suggestions in the I2S
>>> As suggested, our current action involves writing WPTs to better
>>> understand the expected behavior of missing CSS values. This will enable us
>>> to present more informed and concrete results to the CSSWG and other
>>> platforms, fostering clearer discussions and more consistent
>>> implementations.
>>>
>>> We will update the I2S once that step that done.
>>>
>>>
>>>
>>> *From:* Domenic Denicola <dom...@chromium.org>
>>> *Sent:* Friday, June 13, 2025 7:33 AM
>>> *To:* blink-dev <blin...@chromium.org>
>>> *Cc:* Divyansh Mangal <dma...@microsoft.com>
>>> *Subject:* [EXTERNAL] Re: Intent to Ship: Support width and height as
>>> presentation attributes on nested <svg> elements
>>>
>>>
>>>
>>> This intent feels a little risky, because, as WebKit points out
>>> <https://github.com/WebKit/standards-positions/issues/509> in their
>>> standards-positions issue, there isn't really an adequate specification for
>>> how SVG layout works in cases like this. For example, how it will behave
>>> with non-px values. (The WPTs you link only include px values.)
>>>
>>>
>>>
>>> Since SVG2 is a mostly-unmaintained specification, and this feature has
>>> at least some web developer demand, I don't want to require that you
>>> specify everything perfectly here. But I'd like to see at least some of:
>>>
>>>    - Discussion with other implementers in the standards positions
>>>    issues. (You've started these discussions, but I'd like to give them more
>>>    time to settle.)
>>>    - More exhaustive web platform test coverage, including values like
>>>    `min-content`, `calc-size()`, `20em`, `50%`, `auto`, `stretch`, `50vh`, 
>>> etc.
>>>    - Some discussion in the CSSWG about how they would like to see this
>>>    specified in the future.
>>>    - A pull request to update the relevant parts of the SVG2 spec with
>>>    some vague language about the expected results; it doesn't have to be
>>>    rigorous, but it should be at least enough for other implementers to
>>>    understand how to follow our behavior.
>>>
>>> Not all of these are required, and if I had to pick a single one that
>>> was most important, it would be expanded web platform test coverage.
>>>
>>>
>>>
>>> On Wednesday, June 11, 2025 at 10:28:17 PM UTC+9 dma...@microsoft.com
>>> wrote:
>>>
>>> *Contact emails*
>>>
>>> dma...@microsoft.com
>>>
>>> *Explainer*
>>>
>>> None
>>>
>>> *Specification*
>>>
>>> https://svgwg.org/svg2-draft/geometry.html#Sizing
>>>
>>> *Summary*
>>>
>>> This feature supports applying width and height as presentation
>>> attributes on nested <svg> elements through both SVG markup and CSS. This
>>> dual approach provides even greater flexibility for developers, allowing
>>> them to manage and style SVG elements more efficiently within complex
>>> designs.
>>>
>>> With this feature the below two html will now have the same output:
>>>
>>> With CSS Properties for nested <svg> element:
>>>
>>> <svg width="100px" height="100px">
>>>
>>>   <svg style="width:50px;height:50px;">
>>>
>>>     <circle cx="50px" cy="50px" r="40px" fill="green" />
>>>
>>>   </svg>
>>>
>>> </svg>
>>>
>>>
>>>
>>> Without CSS Properties for nested <svg> element:
>>>
>>> <svg width="100px" height="100px">
>>>
>>>   <svg width="50px" height="50px">
>>>
>>>     <circle cx="50px" cy="50px" r="40px" fill="green" />
>>>
>>>   </svg>
>>>
>>> </svg>
>>>
>>>
>>>
>>> *Blink component*
>>>
>>> Blink>SVG
>>> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ESVG%22>
>>>
>>> *TAG review*
>>>
>>> None
>>>
>>> *TAG review status*
>>>
>>> Not applicable
>>>
>>> *Risks*
>>>
>>>
>>>
>>> *Interoperability and Compatibility*
>>>
>>> None
>>>
>>>
>>>
>>> *Gecko*: No signal (
>>> https://github.com/mozilla/standards-positions/issues/1243)
>>> In Firefox, the width and height attributes cannot be applied on nested
>>> <svg> elements as styles
>>>
>>> *WebKit*: Neutral  (
>>> https://github.com/WebKit/standards-positions/issues/509)
>>> In Safari, the width and height attributes cannot be applied on nested
>>> <svg> elements as styles
>>>
>>> *Web developers*: Positive 7 people have upvoted this in the chromium
>>> issue.
>>>
>>> *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*
>>>
>>> Existing Devtools capabilities already support this feature.
>>>
>>>
>>>
>>> *Will this feature be supported on all six Blink platforms (Windows,
>>> Mac, Linux, ChromeOS, 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
>>>
>>> WPTs in chromium:
>>>
>>> https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/web_tests/external/wpt/svg/styling/nested-svg-sizing.svg
>>>
>>> https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/web_tests/external/wpt/svg/styling/nested-svg-sizing-with-use.svg
>>>
>>>
>>>
>>> *Flag name on about://flags*
>>>
>>> None
>>>
>>> *Finch feature name*
>>>
>>> WidthAndHeightAsPresentationAttributesOnNestedSvg
>>>
>>> *Rollout plan*
>>>
>>> Will ship enabled for all users
>>>
>>> *Requires code in //chrome?*
>>>
>>> False
>>>
>>> *Tracking bug*
>>>
>>> https://issues.chromium.org/issues/40409865
>>>
>>> *Estimated milestones*
>>>
>>> Shipping on desktop
>>>
>>> 139
>>>
>>> Shipping on Android
>>>
>>> 139
>>>
>>> Shipping on WebView
>>>
>>> 139
>>>
>>> Shipping on iOS
>>>
>>> 139
>>>
>>>
>>>
>>> *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/5178789386256384?gate=5132029741760512
>>>
>>> This intent message was generated by Chrome Platform Status
>>> <https://chromestatus.com/>
>>>
>>> --
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>>
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