Re: [dom] Fix #119: Merge DOMSettableTokenList into DOMTokenList (#120)

> Implementation-wise, a potential problem is that DOMTokenList is actually a virtual base class

In Chrome. In Firefox it's not, for what it's worth.  Note that per spec there are currently `DOMTokenList`s that are neither `Element.classes` nor `DOMSettableTokenList`, though it looks like Chrome simply doesn't implement them.

I don't think there are any implementation issues here from Gecko's point of view.

What there _is_ is that the HTML spec needs to be updated in sync with this change, as do web platform tests.

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Received on Wednesday, 2 December 2015 18:41:26 UTC