LGTM3

On Wednesday, October 11, 2023 at 4:08:02 PM UTC+2 Mike Taylor wrote:

> LGTM2
> On 10/11/23 7:06 AM, Daniel Bratell wrote:
>
> LGTM1
>
> (Privacy and Security steps in Chromestatus are not completed but they are 
> unlikely to affect anything)
>
> /Daniel
> On 2023-10-04 12:23, Rune Lillesveen wrote:
>
>
>
> On Wed, Oct 4, 2023 at 11:08 AM Rune Lillesveen <[email protected]> 
> wrote:
>
>> Contact emails [email protected], [email protected]
>>
>> Explainer None
>>
>> Specification 
>> https://drafts.css-houdini.org/css-properties-values-api-1/#syntax-strings
>>
>> Summary 
>>
>> Supports using the <image> syntax for custom properties registered with 
>> @property or registerProperty(). The <image> syntax can be used to restrict 
>> values of the custom property to url() values and generated images like 
>> gradients.
>>
>>
>> This syntax was initially excluded from the valid syntaxes mainly because 
>> images were not interpolable and that it would add to the usefulness of the 
>> syntax to be able to interpolate directly on the custom property. The other 
>> engines have shipped the image syntax without supporting interpolation. 
>> There are two interpolation methods in css-image-4, cross-fade() and per 
>> stop interpolation for gradients. The gradient interpolation is not shipped 
>> by any browser (even for standard properties). Safari ships a non-standard 
>> compliant cross-fade() interpolation for standard properties (at least for 
>> background-image), but not for the registered custom properties. 
>>
>>
>> We have an OKR to look into cross-fade() for Q4. If we end up shipping 
>> that, it will work for both registered custom properties and standard 
>> properties.
>>
>>
>> The <image> syntax for registered custom properties is part of Interop 
>> 2023.
>>
>>
>> Blink component Blink>CSS 
>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ECSS>
>>
>> TAG review None
>>
>> TAG review status Not applicable
>>
>> Risks 
>>
>>
>> Interoperability and Compatibility 
>>
>> None
>>
>>
>> *Gecko*: Shipped/Shipping Does not support interpolation
>>
>
> Sorry, this is not correct. It's implemented behind a flag, not shipping 
> yet.
>
> *WebKit*: Shipped/Shipping Does not support interpolation
>>
>> *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 
>>
>> No additional devtools support necessary compared to existing syntaxes. 
>>
>>
>> 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 
>>
>> https://wpt.fyi/css/css-properties-values-api/at-property.html 
>> https://wpt.fyi/css/css-properties-values-api/register-property-syntax-parsing.html
>>  
>> https://wpt.fyi/css/css-properties-values-api/typedom.html 
>>
>>
>> Flag name on chrome://flags #enable-experimental-web-platform-features
>>
>> Finch feature name CSSVariables2ImageValues
>>
>> Requires code in //chrome? False
>>
>> Estimated milestones 
>> Shipping on desktop 120 
>> DevTrial on desktop 115 
>> Shipping on Android 120 
>> DevTrial on Android 115 
>>
>> 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/5142205606133760
>>
>> This intent message was generated by Chrome Platform Status 
>> <https://chromestatus.com/>.
>>
>> -- 
>> Rune Lillesveen
>>
>>
>
> -- 
> Rune Lillesveen
>
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