This is an archived snapshot of W3C's public bugzilla bug tracker, decommissioned in April 2019. Please see the home page for more details.
Bunch of *NS method need the same validation and prefix/local name extraction. Should make an abstract method to localize mistakes.
https://github.com/whatwg/dom/commit/7333798b4bb4a0c08beb44a1ca677618f771f53e