Additionally, @font-face's font-family cannot be used across shadow boundaries either: https://robdodson.me/posts/at-font-face-doesnt-work-in-shadow-dom/ (Ahis post discusses the fact that it doesn't even work within the same shadow root, but that's a browser bug. In any case, it can't be referenced across shadow roots.)
I think it's worth calling out any cross-root use cases we can think of, just to consider if we can solve those at the same time.
I recently realized that SVG
<use>hrefreferences cannot cross shadow boundaries: https://github.com/WICG/webcomponents/issues/772Additionally,
@font-face'sfont-familycannot be used across shadow boundaries either: https://robdodson.me/posts/at-font-face-doesnt-work-in-shadow-dom/ (Ahis post discusses the fact that it doesn't even work within the same shadow root, but that's a browser bug. In any case, it can't be referenced across shadow roots.)I think it's worth calling out any cross-root use cases we can think of, just to consider if we can solve those at the same time.