I agree this should be fixed. Thanks.

I';m wondering if there is any situation in which developers might be
relying on the existing behavior? That is, using this "bug" to render
content not-selectable.

Stephen.

On Mon, Nov 25, 2024 at 2:01 PM Di Zhang <dizha...@chromium.org> wrote:

> Contact emailsdizha...@chromium.org
>
> Specificationhttps://dom.spec.whatwg.org/#shadowroot-delegates-focus
>
> Summary
>
> A shadow host with delegatesFocus set to true will delegate its focus to
> its first focusable child. On a mouse click event, the child will receive
> focus and the event will be marked as handled. This is a problem because
> the steps to handle text selection afterward are not run and the selection
> does not recognize the focused element as part of the selection. We fix
> this by continuing event handling even after an element was delegate
> focused and update how selection recognizes having focus in a shadow tree.
>
>
> Blink componentBlink>DOM>ShadowDOM
> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EDOM%3EShadowDOM>
>
> TAG reviewNone
>
> TAG review statusNot applicable
>
> Risks
>
>
> Interoperability and Compatibility
>
> None
>
>
> *Gecko*: Shipped/Shipping Can select text in shadow host with
> delegatesFocus = true.
>
> *WebKit*: Shipped/Shipping Can select text in shadow host with
> delegatesFocus = true.
>
> *Web developers*: Positive [1] https://stackoverflow.com/q/60260078/864715
>  [2] https://stackoverflow.com/q/62766250/864715
>
> *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/shadow-dom/focus/text-selection-with-delegatesFocus.html?label=experimental&label=master&aligned
>
>
> Flag name on about://flagsSelectionOnShadowDOMWithDelegatesFocus
>
> Finch feature nameNone
>
> Non-finch justificationNone
>
> Requires code in //chrome?False
>
> Tracking bughttps://issues.chromium.org/issues/40622041
>
> Sample links
> http://lopsided-motion.glitch.me/text-select-bug.html
> https://codepen.io/JRJurman/pen/gOqvxXz
>
> Estimated milestones
> Shipping on desktop 133
> Shipping on Android 133
> Shipping on WebView 133
>
> 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/5134341540413440?gate=5134678561128448
>
> This intent message was generated by Chrome Platform Status
> <https://chromestatus.com/>.
>
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> .
>

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