[Bug 23712] New: DOMTokenList needs a way to conditionally set or remove

https://www.w3.org/Bugs/Public/show_bug.cgi?id=23712

            Bug ID: 23712
           Summary: DOMTokenList needs a way to conditionally set or
                    remove
           Product: WebAppsWG
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DOM
          Assignee: [email protected]
          Reporter: [email protected]
        QA Contact: [email protected]
                CC: [email protected], [email protected]

http://dom.spec.whatwg.org/#interface-domtokenlist

It'd be nice if we could change this:

  if (foo != e.classList.has('foo'))
     e.classList.toggle('foo');

...to:

   e.classList.set('foo', foo);

...or some such.

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