[webcomponents] Open/closed is associated with ShadowRoot, not shadow tree (#440)

That's how I ended up specifying it in the DOM Standard: https://dom.spec.whatwg.org/#shadowroot-encapsulation-mode. Trees are just a concept used to define traversing, they don't really carry state. The nodes carry the state.

---
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/w3c/webcomponents/issues/440