https://bennypowers.dev/posts/webc-dsd-slot-workaround/
WebC Declarative Shadow DOM Slot Workarounds
declarative shadow domwebc
https://web.dev/articles/declarative-shadow-dom
Declarative Shadow DOM | web.dev
Aug 13, 2024 - Declarative Shadow DOM is a new way to implement and use Shadow DOM directly in HTML.
declarative shadow domweb dev