I did some testing with TalkBack on android, and I am fixing two issues to
make it better:
- https://chromium-review.googlesource.com/c/chromium/src/+/6937127
- https://chromium-review.googlesource.com/c/chromium/src/+/6952242

foolip also reviewed the spec PR

On Wed, Sep 10, 2025 at 3:01 PM Joey Arhar <[email protected]> wrote:

> > What's the status of the spec PR?
>
> I just updated the commit message and pinged a reviewer.
>
> > Do you know if this works as expected with screen readers? I imagine the
> pop up style rendering works since that's currently a common experience,
> but not sure what would happen in an in-page rendering on mobile?
>
> Thanks for bringing this up. I tested out the in-page listbox rendering on
> android voiceover, and I found that the single-select worked fine but there
> is something wrong with the multi-select mode. I am looking into it now.
>
> On Wed, Sep 10, 2025 at 8:15 AM Vladimir Levin <[email protected]>
> wrote:
>
>> Do you know if this works as expected with screen readers? I imagine the
>> pop up style rendering works since that's currently a common experience,
>> but not sure what would happen in an in-page rendering on mobile?
>>
>> Thanks,
>> Vlad
>>
>> On Thursday, September 4, 2025 at 9:55:18 PM UTC-4 Kent Tamura wrote:
>>
>>> LGTM1.  The consistent behavior is reasonable, and the compatibility
>>> risk looks very small.
>>>
>>>
>>> On Fri, Sep 5, 2025 at 2:42 AM Joey Arhar <[email protected]> wrote:
>>>
>>>> Contact [email protected]
>>>>
>>>> Explainer
>>>> https://github.com/whatwg/html/issues/8189#issuecomment-2877242732
>>>>
>>>> Specificationhttps://github.com/whatwg/html/pull/11460
>>>>
>>>> Summary
>>>>
>>>> By using the size and multiple attributes, the select element can be
>>>> rendered as an in-page listbox or a button with a popup. However, these
>>>> modes are not consistently available across mobile and desktop chrome.
>>>> Currently, in-page listbox rendering is not available on mobile, and button
>>>> with popup is not available on desktop when the multiple attribute is
>>>> present. This feature adds the listbox to mobile and adds a multi-select
>>>> popup to desktop, and makes the opt-ins with the size and multiple
>>>> attributes result in the same rendering mode across mobile and desktop.
>>>> Here is a summary of the changes: - When the size attribute has a value
>>>> greater than 1, in-page rendering will always be used. Previously, this was
>>>> ignored on mobile and always resulted in a popup. - When the multiple
>>>> attribute is set with no size attribute, in-page rendering will be used.
>>>> Previously, this was a popup instead of an in-page listbox on mobile. -
>>>> When the multiple attribute is set with size=1, a popup will be used.
>>>> Previously, this was an in-page listbox on desktop. By making this change,
>>>> we are providing a foundation to bring customizable select to in-page
>>>> rendering and multi-select. Customizable select currently only works for
>>>> single-selects with a popup.
>>>>
>>>>
>>>> Here is a screenshot of the new multi-select popup for desktop, which
>>>> you'll get with <select multiple size=1>. This was created to reach parity
>>>> with the previously existing multi-select popup on android.
>>>> [image: 479732188-e42f4512-1059-4bae-85ed-00e2dee2a967.png]
>>>>
>>>> Blink componentBlink>Forms>Select
>>>> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EForms%3ESelect%22>
>>>>
>>>> TAG reviewNone
>>>>
>>>> TAG review statusNot applicable
>>>>
>>>> Risks
>>>>
>>>>
>>>> Interoperability and Compatibility
>>>>
>>>> Interop risk is low because of the positive standards position from
>>>> Mozilla and the lack of blocking feedback from Apple in many standards
>>>> discussions. There is a compat risk of breaking existing usage of select
>>>> multiple on mobile which currently always uses a picker but will be changed
>>>> to use the in-page listbox to match desktop. If there are any mobile sites
>>>> relying on this particular rendering mode, they will have to add the size=1
>>>> attribute to their select element. I added a UseCounter to see how often
>>>> users open a select multiple picker on mobile, and the usage is quite low:
>>>> https://chromestatus.com/metrics/feature/timeline/popularity/5549
>>>>
>>>>
>>>> *Gecko*: Positive (
>>>> https://github.com/mozilla/standards-positions/issues/1274)
>>>>
>>>> *WebKit*: No signal (
>>>> https://github.com/WebKit/standards-positions/issues/532)
>>>>
>>>> *Web developers*: No signals
>>>>
>>>> *Other signals*:
>>>>
>>>> Ergonomics
>>>>
>>>> I expect the in-page rendering mode to be used in tandem with
>>>> customizable select in the future when customizable select is expanded to
>>>> include the in-page listbox rendering mode. The default usage of this API
>>>> will not make it hard for chrome to maintain good performance.
>>>>
>>>>
>>>> Activation
>>>>
>>>> It will not be challenging for developers to take advantage of this
>>>> feature immediately.
>>>>
>>>>
>>>> Security
>>>>
>>>> I don't believe there are any security risks for this feature.
>>>>
>>>>
>>>> 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
>>>>
>>>> DevTools shows the attributes on the select element in the elements
>>>> panel, but doesn't explain the logic for how the size and multiple
>>>> attributes result in the different rendering modes. I expect this to be
>>>> documented on MDN so developers can learn how to control this.
>>>>
>>>>
>>>> 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>
>>>> ?No
>>>>
>>>> There is not a good way to test the native appearance of the select
>>>> element, and there is no way to test whether the select element is in a
>>>> mode which supports a picker or not.
>>>>
>>>>
>>>> Flag name on about://flagsNone
>>>>
>>>> Finch feature nameSelectMobileDesktopParity
>>>>
>>>> Rollout plan(RARE) Experiment users ramp up over time
>>>>
>>>> Requires code in //chrome?False
>>>>
>>>> Tracking bughttps://issues.chromium.org/issues/439964654
>>>>
>>>> Estimated milestones
>>>>
>>>> Finch in 141, enable by default in 142
>>>>
>>>>
>>>> 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/5412736871825408?gate=6327273552740352
>>>>
>>>> This intent message was generated by Chrome Platform Status
>>>> <https://chromestatus.com/>.
>>>>
>>>> --
>>>>
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>>>> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAK6btwLEPi_ObWz9KhGJwsH2088%2BrDVJfUDFSin2SUBwNNkznw%40mail.gmail.com?utm_medium=email&utm_source=footer>
>>>> .
>>>>
>>>
>>>
>>> --
>>> TAMURA Kent
>>> Software Engineer, Google
>>>
>>>
>>>

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