Re: backdrop for fullscreened elements and modal dialogs/lightboxes

I have a question about <dialog>. If you show a <dialog> inside an
<iframe>, should the <dialog> fill just the <iframe> or should it cover the
outer page too?

I suspect the latter. If so, then the only difference between the rendering
of <dialog> and the rendering of fullscreen elements is whether the
toplevel browsing context should actually fill the screen or not. Is that
right?

If so, then maybe <dialog> should just use all the fullscreen machinery,
just in a special mode where the browser window doesn't go fullscreen.

Rob
-- 
"If we claim to be without sin, we deceive ourselves and the truth is not
in us. If we confess our sins, he is faithful and just and will forgive us
our sins and purify us from all unrighteousness. If we claim we have not
sinned, we make him out to be a liar and his word is not in us." [1 John
1:8-10]