> Any plans to add a built-in search/type-to-filter field into the rendered
widget (either popup or in-page) when there are more than one "page"/scroll
of options?

I've been discussing this capability here:
https://github.com/openui/open-ui/issues/847

On Thu, Sep 4, 2025 at 1:13 PM PhistucK <[email protected]> wrote:

> Sounds nice. Any plans to add a built-in search/type-to-filter field into
> the rendered widget (either popup or in-page) when there are more than one
> "page"/scroll of options?
>
>
> ☆*PhistucK*
>
>
> On Thu, Sep 4, 2025 at 6:42 PM 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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>>
>

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