Re: [whatwg/dom] Proposal: a DocumentFragment whose nodes do not get removed once inserted (#736)

robbiespeed left a comment (whatwg/dom#736)

@rniwa Having such limits on parser changes sounds like a major problem for advancing HTML, are there any proposals to relax/generalise the parsing rules such that future features are not such a problem to add?

As far as I can tell the XML parser used for XHTML would have no issues, but I did take a look at the HTML parser spec and it is significantly complex, so I see why changes are avoided. _If there's no path forward for improving the HTML parser situation maybe it makes sense for the web to push for an XHTML future once again._

I do still think a `fragment` element would be worth it considering that HTML includes would need similar spec changes, and there's something to be gained from aligning the features together.

The comment marker based approach for grouping is also not without it's downsides, it's possible for groups to break due to marker pairs being separated in the tree. That's going to impact users, and will also need to be addressed in the DOM spec.

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