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

DOM Standard ― Mutation methods

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

Changeset 129400 – WebKit ― DOM4 remove method

What about others? Not yet.

Bug 74648 – DOM4: prepend, append, before, after & replace
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