https://scottjehl.com/posts/html-web-components-shadow-dom/
HTML Web Components Can Have a Little Shadow DOM, As A Treat | Scott Jehl, Web Designer/Developer
Shadow DOM and Slots can be part of a progressive enhancement strategy, actually.
html web componentsshadow dom
https://thathtml.blog/2025/09/reciprocate-reactivity-for-html-web-components/
Announcing Reciprocate, a Sweet Solution for Making Your HTML Web Components Reactive | That HTML...
A new helper utility for adding signal-based reactivity and attribute/property reflection to any vanilla custom element class.
sweet solutionhtml webmaking