The DOM(4) spec offers a few new handy mutation methods: append(), prepend(), before(), after(), replace(), and remove().

DOM Standard ― Mutation methods
http://dom.spec.whatwg.org/#mutation-methods

And support for the remove() method has just been landed in WebKit.

Changeset 129400 – WebKit ― DOM4 remove method
http://trac.webkit.org/changeset/129400

What about others? Not yet.

Bug 74648 – DOM4: prepend, append, before, after & replace
https://bugs.webkit.org/show_bug.cgi?id=74648
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