LGTM to extend the deprecation trial till M138 inclusive.

The process
<https://www.chromium.org/blink/launching-features/#deprecation-trial>
requires "significant progress", and I believe shipping the bug fixes in
M130 qualifies as such.

On Wed, Oct 30, 2024 at 11:29 AM Yoav Weiss (@Shopify) <
yoavwe...@chromium.org> wrote:

> Just to see I understand the situation - while the deprecation trial
> started in M127, issues with the path we want developers to take only
> shipped in 130?
>

Chris answered my questions here, so all good.


>
> On Tue, Oct 29, 2024 at 10:31 PM Di Zhang <dizha...@chromium.org> wrote:
>
>> I noticed the above template drafted email makes it sound like I am
>> talking about the feature and not the opt-out (deprecation) origin trial. I
>> want to clarify this is a request to extend the Deprecation Origin Trial
>> KeyboardFocusableScrollersOptOut only, which is currently expiring in
>> M132. Thank you.
>>
>> On Tuesday, October 29, 2024 at 9:45:45 AM UTC-7 Di Zhang wrote:
>>
>>> Contact emailsdizha...@chromium.org, mas...@chromium.org
>>>
>>> ExplainerNone
>>>
>>> Specification
>>> https://html.spec.whatwg.org/multipage/interaction.html#attr-tabindex
>>>
>>> Design docs
>>> https://drafts.csswg.org/css-overflow-3/#scroll-container
>>> https://html.spec.whatwg.org/multipage/interaction.html#focusable-area
>>> https://html.spec.whatwg.org/multipage/interaction.html#dom-tabindex
>>>
>>> Summary
>>>
>>> Improves accessibility by making scroll containers focusable using
>>> sequential focus navigation. Today, the tab key doesn't focus scrollers
>>> unless tabIndex is explicitly set to 0 or more. By making scrollers
>>> focusable by default, users who can't (or don't want to) use a mouse will
>>> be able to focus clipped content using a keyboard's tab and arrow keys.
>>> This behavior is enabled only if the scroller does not contain any keyboard
>>> focusable children. This logic is necessary so we don't cause regressions
>>> for existing focusable elements that might exist within a scroller like a
>>> <textarea>. Note: The previous rollout of this feature (started in Chrome
>>> 127) was stopped due to web compatibility issues, which should be fixed in
>>> the current implementation shipping in 130.
>>>
>>>
>>> Blink componentBlink>HTML>Focus
>>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EHTML%3EFocus>
>>>
>>> Search tagstab key <https://chromestatus.com/features#tags:tab%20key>, 
>>> keyboard
>>> focus <https://chromestatus.com/features#tags:keyboard%20focus>, sequential
>>> navigation
>>> <https://chromestatus.com/features#tags:sequential%20navigation>
>>>
>>> TAG review
>>>
>>> TAG review statusNot applicable
>>>
>>> Chromium Trial NameKeyboardFocusableScrollersOptOut
>>>
>>> Origin Trial documentation link
>>> https://developer.chrome.com/blog/keyboard-focusable-scrollers
>>>
>>> WebFeature UseCounter namekNotApplicable
>>>
>>> Risks
>>>
>>>
>>> Interoperability and Compatibility
>>>
>>> This is a change in behavior, but already matches what Firefox is doing
>>> (have scroller be focusable by default). Low compatibility risk since this
>>> default behavior is only enabled if the scroller doesn't have any focusable
>>> children.
>>>
>>>
>>> *Gecko*: Shipped/Shipping Chrome behavior is slightly different since
>>> we are checking if any scroller child is focusable. This is to avoid
>>> regression on existing focus sequences.
>>>
>>> *WebKit*: No signal (https://bugs.webkit.org/show_bug.cgi?id=190870)
>>>
>>> *Web developers*: Positive (
>>> https://twitter.com/simevidas/status/1444033718742667270)
>>>
>>> *Other signals*:
>>>
>>> Ergonomics
>>>
>>> There are no other platform APIs this feature will be used in tandem
>>> with. It will not be hard for Chrome to maintain good performance.
>>>
>>>
>>> Activation
>>>
>>> It will not be challenging for developers to take advantage of this
>>> feature immediately.
>>>
>>>
>>> Security
>>>
>>> There are no security risks, this is a change for keyboard focusing
>>> behavior.
>>>
>>>
>>> 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?
>>>
>>> This is not high risk for WebView.
>>>
>>>
>>> Goals for experimentation
>>>
>>>
>>>
>>> Reason this experiment is being extended
>>>
>>> Request to extend by another 6 milestones, from M132 to M138 We had to
>>> push our release plan from 127 to 130 to fix specific cases, per user
>>> requests [1]. As such, users only had 3 milestones to use the Origin Trial
>>> and adjust their sites to the new KeyboardFocusableScrollers behavior.
>>> Since this feature is changing a user noticeable behavior, we believe it
>>> would be safer to extend ahead. We already have a few comments mentioning
>>> depending on the Deprecation Trial:
>>> https://issues.chromium.org/issues/375425838#comment1
>>> https://issues.chromium.org/issues/342705690#comment39 [1]
>>> https://issues.chromium.org/issues/361072782
>>>
>>>
>>> Ongoing technical constraints
>>>
>>> None
>>>
>>>
>>> Debuggability
>>>
>>> This is a change to focus navigation and DevTools does not offer
>>> debugging support for this behavior.
>>>
>>>
>>> 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
>>>
>>> Flag name on chrome://flagsKeyboardFocusableScrollers
>>>
>>> Finch feature nameKeyboardFocusableScrollers
>>>
>>> Requires code in //chrome?False
>>>
>>> Tracking bug
>>> https://bugs.chromium.org/p/chromium/issues/detail?id=1040141
>>>
>>> Availability expectationFirefox already implemented (a variant of
>>> this). If we succeed and don't break websites, Safari is more likely to
>>> follow suit.
>>>
>>> Adoption expectationThis is a default behavior change and websites
>>> don't need to make changes.
>>>
>>> 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?
>>> This feature does not depend on any APIs outside the chromium open
>>> source repository.
>>>
>>> Estimated milestones
>>> Shipping on desktop 130
>>> Origin trial desktop first 127
>>> Origin trial desktop last 132
>>> Origin trial extension 1 end milestone 138
>>> DevTrial on desktop 123
>>> Shipping on Android 130
>>> Origin trial Android first 127
>>> Origin trial Android last 132
>>> DevTrial on Android 123
>>> Shipping on WebView 130
>>> Origin trial WebView first 127
>>> Origin trial WebView last 132
>>>
>>> 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).
>>> This change is not specced yet. If this succeed, we will try to get it
>>> specced.
>>>
>>> Link to entry on the Chrome Platform Status
>>> https://chromestatus.com/feature/5231964663578624?gate=4709973026930688
>>>
>>> Links to previous Intent discussionsIntent to Experiment:
>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/2qwzMaEGWTk/m/X5MILw3BAQAJ
>>> Intent to Ship:
>>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAM0wra8dpmu3Dbykg%2BZ6e-Ka4r0r8kAiHAYmhU0WpGkEE%2B7Wzw%40mail.gmail.com
>>>
>>>
>>> This intent message was generated by Chrome Platform Status
>>> <https://chromestatus.com/>.
>>>
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>>
>

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