LGTM1

On Monday, October 7, 2024 at 3:47:43 PM UTC+2 f...@opera.com wrote:

> On Mon, Oct 7, 2024 at 6:15 AM Domenic Denicola <dome...@chromium.org> 
> wrote:
>
>> This looks like a great straightforward way of making the platform more 
>> consistent. Just a few minor questions for the intent before approving...
>>
>> On Fri, Oct 4, 2024 at 5:18 PM Chromestatus <
>> ad...@cr-status.appspotmail.com> wrote:
>>
>>> Contact emails f...@opera.com 
>>>
>>> Explainer None
>>
>>
>> Can you write up a quick paragraph or two explaining this feature, and 
>> why web developers are excited about it?
>>
>
> This is what I wrote in the "Motivation" field:
>
> "This feature allows easily sharing SVG paint servers, clip paths and 
> markers between different documents, and, for example, having a library of 
> such resources."
>
> This allows creating reusable "components" in the form of clip paths, 
> gradients, patterns and markers. This is in a way similar to how you, 
> today, can have an external SVG with "symbols" that can be reused via <use>.
>
>  
>>
>>>
>>>
>>> Specification https://svgwg.org/svg2-draft/linking.html#URLReference 
>>>
>>> Summary 
>>>
>>> Allow external references for clip paths, markers, and paint servers 
>>> (for the 'fill' and 'stroke' properties). For example, clip-path: 
>>> url("resources.svg#myPath").
>>>
>>>
>>> Blink component Blink>SVG 
>>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ESVG> 
>>>
>>> Search tags svg <http:///features#tags:svg> 
>>>
>>> TAG review None 
>>>
>>> TAG review status Not applicable 
>>>
>>> Risks 
>>>
>>>
>>> Interoperability and Compatibility 
>>>
>>> The main interoperability risk is that these properties still do not 
>>> support referencing external resource document in all browsers (not 
>>> supported in WebKit yet). No compatibility issues are known from similar 
>>> cases (for example 'mask-image'), and it's assumed that the support in 
>>> these additional set of properties will be similar.
>>>
>>>
>>> *Gecko*: Shipped/Shipping Has been shipping for a long time. No attempt 
>>> was made to dig up the ancient scrolls containing the relevant release 
>>> notes. 
>>>
>>> *WebKit*: No signal
>>>
>>
>> Can you file for signals?
>>
>
>  https://github.com/WebKit/standards-positions/issues/411
>
>  
>>
>>>
>>>
>>> *Web developers*: Strongly positive Has 123 stars/+1s when this is 
>>> being written. 
>>>
>>> *Other signals*: 
>>>
>>> Security 
>>>
>>> Requests the resources in the same way as similar properties - for 
>>> example 'mask-image' (same-origin credentials mode).
>>>
>>>
>>> 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 
>>>
>>> Supported the same way as any other resource referenced via CSS.
>>>
>>>
>>> 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 
>>>
>>>
>>> https://wpt.fyi/results/css/css-masking/clip-path/clip-path-url-reference-external.html
>>>  
>>> https://wpt.fyi/results/svg/linking/reftests/url-processing-fetch-properties-001.sub.svg
>>>  
>>> https://wpt.fyi/results/svg/linking/reftests/url-processing-fetch-properties-002.sub.svg
>>>  
>>> https://wpt.fyi/results/svg/painting/reftests/gradient-external-reference.svg
>>>  
>>> https://wpt.fyi/results/svg/painting/reftests/marker-external-reference.svg 
>>> https://wpt.fyi/results/svg/painting/reftests/pattern-external-reference.svg
>>>
>>
>> A few of these fail in Gecko, and one of them passes in WebKit, which 
>> doesn't quite match the claimed interop status. (Also, the first one shows 
>> as failing even in Chrome.) Can you help reassure us that the test coverage 
>> here is solid?
>>
>
>
> https://wpt.fyi/results/css/css-masking/clip-path/clip-path-url-reference-external.html
>
> This test seems to have minor rendering differences between the two 
> different test runners (for Chrome), and also Gecko. I guess we'll need to 
> add some fuzziness parameters.
>
>
> https://wpt.fyi/results/svg/linking/reftests/url-processing-fetch-properties-001.sub.svg
>
> This is testing "anonymous" state for CORS. Looks like there could be 
> disagreement there. I filed 
> https://bugzilla.mozilla.org/show_bug.cgi?id=1923109 for discussion.
>
>
> https://wpt.fyi/results/svg/linking/reftests/url-processing-fetch-properties-002.sub.svg
>
> This passes everywhere because it tests that a resource is not allowed to 
> load (and thus the fallback color is used instead).
>
>
> /fs
>  
>
>>  
>>
>>>
>>>
>>> Flag name on chrome://flags 
>>>
>>> Finch feature name SvgExternalResources 
>>>
>>> Requires code in //chrome? False 
>>>
>>> Tracking bug https://issues.chromium.org/40134477 
>>>
>>> Estimated milestones 
>>> Shipping on desktop 131 
>>> Shipping on Android 131 
>>> Shipping on WebView 131 
>>>
>>> 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/5198862739046400?gate=5157993826746368 
>>>
>>> This intent message was generated by Chrome Platform Status 
>>> <https://chromestatus.com>. 
>>>
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>>> .
>>>
>>

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