Hello everyone.

I spotted crrev.com/c/7981260 in my watchlist 
for 
android_webview/test/data/web_tests/virtual/stable/webexposed/global-interface-listing-expected.txt

This I2S and the ChromeStatus entry state that this feature is not 
implemented outside of Desktop platforms. ("Not yet implemented on ChromeOS 
or Android, but nothing stops us from rolling out on those platforms 
later.")

However, the expectation file for android_webview was updated, meaning 
these new APIs were exposed on Android WebView. I suspect that it may also 
be exposed on other platforms (such as Chrome on Android and ChromeOS) as 
there doesn't appear to be a platform filter in 
runtime_enabled_features.json5.

Is exposing the API on unsupported platforms expected here?
On Monday, 22 June 2026 at 20:21:00 UTC+1 Vladimir Levin wrote:

> LGTM3
>
> On Mon, Jun 22, 2026 at 3:00 PM Mike Taylor <[email protected]> wrote:
>
>> LGTM2
>> On 6/22/26 2:36 p.m., Alex Russell wrote:
>>
>> LGTM1
>>
>> On Friday, June 19, 2026 at 2:05:51 PM UTC-7 [email protected] wrote:
>>
>>> *Contact emails*
>>> [email protected], [email protected], [email protected]
>>>
>>> *Specification*
>>> https://github.com/w3c/aria/pull/1805
>>>
>>> *Summary*
>>> Support aria-actions attribute. There is a common UI pattern where 
>>> secondary actions are placed within composite interactive widgets. The 
>>> aria-actions attribute allows us to expose these secondary action buttons 
>>> directly for improved discoverability.
>>>
>>> *Blink component*
>>> Blink>Accessibility 
>>> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EAccessibility%22>
>>>
>>> *Web Feature ID*
>>> Missing feature,  see *aria-actions · Issue #4108 · 
>>> web-platform-dx/web-features* 
>>> <https://github.com/web-platform-dx/web-features/issues/4108>
>>>
>>> *Motivation*
>>> Many common UI patterns today involve the concept of "secondary 
>>> actions", such as the close button on a tab. AT discovery of these related 
>>> actions is a common pain point, for example, when a screen reader user 
>>> focuses on a tab, they should be made aware of any associated controls, 
>>> such as the close button.
>>>
>>> *Initial public proposal*
>>> https://github.com/w3c/aria/issues/1440
>>>
>>> *TAG review*
>>> Explanation for why this meets the exception criteria 
>>> <https://www.chromium.org/blink/launching-features/wide-review/#exceptions>
>>> :
>>> * The specification in ARIA has largely been accepted, with only a 
>>> single issue under discussion, and this issue is not web-facing. All 
>>> parties are in agreement with the web-facing side of the API.
>>> * This has already shipped in Firefox.
>>>
>>> *TAG review status*
>>> Not applicable
>>>
>>> *Risks*
>>>
>>> *Interoperability and Compatibility*
>>> This is already shipped in Firefox, and webkit has a prototype 
>>> implementation.
>>>
>>> *Gecko*: Shipped/Shipping (
>>> https://github.com/mozilla/standards-positions/issues/1422) Firefox has 
>>> already shipped this feature.
>>>
>>> *WebKit*: In development (
>>> https://github.com/WebKit/standards-positions/issues/686) Webkit has a 
>>> prototype implementation of the feature: 
>>> https://bugs.webkit.org/show_bug.cgi?id=306476
>>>
>>> *Web developers*: Positive FluentUI is ready to add usage of the 
>>> feature once it is available.
>>>
>>> *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?*
>>> No
>>>
>>>
>>> *Debuggability*
>>> This feature has the same DevTools debugging support as other aria idref 
>>> properties, with the reflected value shown to point to the target of the 
>>> reference.
>>>
>>> *Will this feature be supported on all six Blink platforms (Windows, 
>>> Mac, Linux, ChromeOS, Android, and Android WebView)?*
>>> Not in 151 when the feature initially ships.
>>> Not yet implemented on ChromeOS or Android, but nothing stops us from 
>>> rolling out on those platforms later.
>>> As this is a discovery mechanism, sites won't have any breaking behavior 
>>> when the feature is unsupported.
>>>
>>> *Is this feature fully tested by **web-platform-tests* 
>>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
>>> *?*
>>> Not Fully tested but is partially tested.
>>> https://wpt.fyi/results/wai-aria/aria-actions WPTs covering the 
>>> validation and user agent MUSTS from the spec are written, but the 
>>> end-to-end flow of the feature is not currently testable via these tests as 
>>> they rely on platform specific APIs. This remaining set of functionality 
>>> will eventually be possible to test via the aamtest framework that is 
>>> under development <https://github.com/web-platform-tests/rfcs/pull/204> 
>>> which 
>>> currently only has limited support on some platforms.
>>>
>>> *Flag name on about://flags*
>>> *No information provided*
>>>
>>> *Finch feature name*
>>> AriaActions
>>>
>>> *Rollout plan*
>>> Will ship enabled for all users
>>>
>>> *Requires code in //chrome?*
>>> False
>>>
>>> *Tracking bug*
>>> https://issues.chromium.org/issues/514751946
>>>
>>> *Availability expectation*
>>> Feature is already available in Firefox, and is available behind a flag 
>>> in Safari.
>>>
>>> *Adoption expectation*
>>> Fluent at Microsoft is ready to begin adopting the 
>>> feature within a month of it being available in chromium.
>>>
>>> *Adoption plan*
>>> Given that this feature is a discovery mechanism for already-accessible 
>>> controls: in most situations, there is no need for developers to use a 
>>> polyfill or other compatibility mechanism. The API is purely additive, 
>>> making it easy for developers to start using it without needing to have a 
>>> behavior change for platforms or browsers that lack support.
>>>
>>> *Non-OSS dependencies*
>>> *Does the feature depend on any code or APIs outside the Chromium open 
>>> source repository and its open-source dependencies to function?*
>>> No
>>>
>>> *Non-OSS dependencies*
>>>
>>> *Does the feature depend on any code or APIs outside the Chromium open 
>>> source repository and its open-source dependencies to function?*
>>> No
>>>
>>> *Estimated milestones*
>>> Shipping on desktop
>>> 151
>>>
>>>
>>> *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).*
>>> https://github.com/w3c/aria/issues/2691 is the only remaining 
>>> aria-action issue that is still under discussion. This issue is tracking 
>>> *if* focus should be made to stay on the element that has the 
>>> aria-actions attribute when an associated action is used, and if it is, 
>>> this issue tracks the mechanism that will ensure focus doesn't move from 
>>> the user's perspective, this will be either a user agent or AT requirement. 
>>> No matter the resolution, we agree that web authors should have no 
>>> expectation or assumption around the specific behavior (by design) and 
>>> therefore this is *not* a compatibility risk.
>>>
>>> *Link to entry on the Chrome Platform Status*
>>> https://chromestatus.com/feature/5161589307867136?gate=5677000080228352
>>>
>>> *Links to previous Intent discussions*
>>> Intent to Prototype: 
>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/cYs7hgcwgcU/m/E_YOm2OjBgAJ
>>>
>>>
>>> This intent message was generated by Chrome Platform Status 
>>> <https://chromestatus.com/>.
>>>
>>>
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