Hi, we are going to go ahead and close this review. Please let us know if
and when you come back to it so we can reopen.

On Wed, Mar 6, 2024 at 9:12 AM Daniel Bratell <bratel...@gmail.com> wrote:

> (resending to list since I accidentally dropped it)
>
> Hi,
>
> We discussed this intent in the API Owner meeting, and I ended up with
> some questions.
>
> Question 1: What is the current behaviour in the case where the
> specification wants us to return null?
>
> Question 2: I understand that Gecko currently follows the specification as
> it is written, but if this change has a web compat risk, maybe it is the
> specification that should change. Was that something you considered?
>
> Question 3: What is the web compatibility risk? Do you have any
> information about how many pages that would be affected (possibly
> negatively)? We want to have an idea of how impactful a change will be
> before shipping it, and at least I don't know if this is used by one page
> in a billion or half the web.
>
> /Daniel
>
>
> On 2024-03-06 15:48, eui-sa...@samsung.com wrote:
>
> Sorry for the delay.
>
> I am not sure if there is any interest from developers. The spec was
> updated last April [1]. I started this from the spec change and the related
> crbug.
>
> I filed an issue[2] last week and got a comment[3] in WebKit. The
> reviewer's worry would be that the lifetime of these objects is not
> carefully defined and as such when they return null and non-null can end up
> varying in edge cases.
>
> I thought this was very clear to be changed in spec that CSSOM was not
> matched with at-rule behavior and it has low compat risk.
>
> [1] https://github.com/w3c/csswg-drafts/issues/8608
> [2] https://github.com/WebKit/standards-positions/issues/325
> [3]
> https://github.com/WebKit/standards-positions/issues/325#issuecomment-1966698090
> On Wednesday, March 6, 2024 at 7:28:32 PM UTC+9 yoav...@chromium.org
> wrote:
>
>> Friendly ping on the above questions! :)
>>
>> On Wed, Feb 28, 2024 at 6:18 PM Yoav Weiss (@Shopify) <
>> yoav...@chromium.org> wrote:
>>
>>> Do I understand correctly that this would partially align us with
>>> Firefox (modulo the crash), and take us away from WebKit interoperability?
>>>
>>> If so, it'd be good to understand if:
>>> * There is interest from developers in this
>>> * WebKit is planning to follow
>>> * This has low compat risk (in terms of current sites relying on this
>>> value not being null somehow)
>>>
>>>
>>> On Tue, Feb 27, 2024 at 2:52 AM eui-sa...@samsung.com <
>>> eui-sa...@samsung.com> wrote:
>>>
>>>> >  Would you mind explaining why this is a useful addition for
>>>> developers? Or is the motivation improved spec compliance?
>>>>
>>>> In both perspectives. The CSS OM spec was fixed because it was not
>>>> matched with the spec of @import in css-cascade. The behaviour of
>>>> CSSImportRule is not following @import.
>>>>
>>>>
>>>> > Can you request a signal?
>>>> https://github.com/WebKit/standards-positions
>>>>
>>>> Sure, I filed an issue.
>>>> https://github.com/WebKit/standards-positions/issues/325
>>>>
>>>>
>>>> > All of these tests are passing right now - will you be adding new
>>>> tests?Yes, I will add new tests in
>>>> https://wpt.fyi/results/css/cssom/cssimportrule.html?label=experimental&label=master&aligned
>>>> I am working on it.
>>>>
>>>> https://chromium-review.googlesource.com/c/chromium/src/+/5065830/8/third_party/blink/web_tests/external/wpt/css/cssom/cssimportrule.html
>>>>
>>>> On Sunday, February 25, 2024 at 7:14:59 AM UTC+9 mike...@chromium.org
>>>> wrote:
>>>>
>>>>> On 2/23/24 8:31 AM, Amos Lim wrote:
>>>>>
>>>>> Contact emails eui-sa...@samsung.com
>>>>>
>>>>> Explainer None
>>>>>
>>>>> Would you mind explaining why this is a useful addition for
>>>>> developers? Or is the motivation improved spec compliance?
>>>>>
>>>>>
>>>>> Specification
>>>>> https://drafts.csswg.org/cssom/#the-cssimportrule-interface
>>>>>
>>>>> Summary
>>>>>
>>>>> Allow CSSImportRule.styleSheet to be nullable. The styleSheet
>>>>> attribute in CSSImportRule can be null if there is no associated CSS style
>>>>> sheet.
>>>>>
>>>>>
>>>>> 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
>>>>>
>>>>> *WebKit*: No signal
>>>>>
>>>>> Can you request a signal?
>>>>> https://github.com/WebKit/standards-positions
>>>>>
>>>>>
>>>>> *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
>>>>>
>>>>> None
>>>>>
>>>>>
>>>>> Will this feature be supported on all six Blink platforms (Windows,
>>>>> Mac, Linux, ChromeOS, Android, and Android WebView)? No
>>>>>
>>>>> 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/cssom/cssimportrule.html?label=experimental&label=master&aligned
>>>>>
>>>>> All of these tests are passing right now - will you be adding new
>>>>> tests?
>>>>>
>>>>>
>>>>> Flag name on chrome://flags
>>>>>
>>>>> Finch feature name CSSImportRuleStyleSheetNullable
>>>>>
>>>>> Requires code in //chrome? False
>>>>>
>>>>> Tracking bug https://issues.chromium.org/issues/40266154
>>>>>
>>>>> Estimated milestones
>>>>> Shipping on desktop 124
>>>>> Shipping on Android 124
>>>>> Shipping on WebView 124
>>>>>
>>>>> 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/5123480866783232
>>>>>
>>>>> This intent message was generated by Chrome Platform Status
>>>>> <https://chromestatus.com/>.
>>>>>
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>>>>> .
>>>>>
>>>>> --
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>>>> .
>>>>
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