+1

[jhnns]

Just wanted to leave a comment that this looks good 👍.

I do agree that the seamless spec was probably too complicated. It's mainly about the problem that the iframe's content should be displayed without scrollbars. In contrast to the discussion at whatwg/html#331 and here, I don't think that this issue is resolved by Shadow DOM as the iframe provides other benefits like its own JS context.

[craigfrancis]

Completely agree, for years I've been writing hacky JavaScript to stop scroll bars, while I've been waiting for seamless, and I'm kind of glad that seamless has now been removed so we can focus on the main problem :-)

I'm going to close this issue, as I don't think I need to make any other changes at the moment, but thanks for the comment.