Re: [WICG/webcomponents] Reference Target: How to handle events fired on the reference target by related elements? (Issue #1098)

alice left a comment (WICG/webcomponents#1098)

#### Submit button with `form` attribute pointing to `<form>` in same shadow root

From https://github.com/WICG/webcomponents/issues/1098#issuecomment-2800523352

```html
<x-form id="x-form">
  <template shadowRootMode="open" referenceTarget="form">
    <form id="form">
        <slot></slot>
        <input type="submit">
    </form>
  </template>
  <label>Name: <input form="x-form"></label>
</x-form>
```

(Steps 1-8 are the same as above.)
9. 🆕 When [a shadow root's get the parent](https://dom.spec.whatwg.org/#ref-for-get-the-parent%E2%91%A6) is invoked on the shadow root, we go to the new logic:
   > 1. let _target_ be event’s path’s first struct’s invocation target;
   > 2. if _event_’s composed flag is set, or shadow root is not the root of _target_, return return shadow root’s host;
   > 3. otherwise, if _event_ has an invoker, and _event_'s invoker's root is a shadow-including ancestor of shadow root, return the result of retargeting _target_ against event's triggering element;
   > 4. otherwise, return null.
   
   _target_ is `form`; the composed flag is _not_ set, shadow root _is_ the root of _target_; event has an invoker, `submitButton`; `submitButton`'s root (shadow root) is _not_ a shadow-including (exclusive) ancestor of shadow root; so, we return null as the parent element.
10. Back in event dispatch the path is again [`form`, shadow root] as it would be normally.
11. Event dispatch continues as normal with the given event path; `composedPath()` works as normal.

-- 
Reply to this email directly or view it on GitHub:
https://github.com/WICG/webcomponents/issues/1098#issuecomment-2803733327
You are receiving this because you are subscribed to this thread.

Message ID: <WICG/webcomponents/issues/1098/2803733327@github.com>