Re: How can I put a DocumentFragment in a Document?

A DocumentFragment can never be a child of any other node. If you try to
append or insert it, its _children_ are appended/inserted instead.

That convenience feature is the main reason DocumentFragment exists...

(Anticipating the next likely question: Remember that nodes belong to
specific Documents, and may only be appended to that Document. If the
DocumentFragment was created as part of one Document, you can _not_
directly append its contents to another Document; you need to use the
importNode method or some equivalent.)

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Joe Kesselman  / IBM Research