Re: [whatwg/dom] TreeWalker constructor (#818)

> I expected developers to not use these classes.

Perhaps it’s less common than I thought. I’ve used it fairly often over the years — being able to skip subtrees with the filter can be pretty useful — but it’s true that there are lots of alternatives. Any particular reasons you’d expect it not to be used much anymore?

In general I think it would be less surprising if `foo.createBar` ops that produce instances of `Bar` but don’t actually make use of `foo` all had ordinary constructor ops on Bar, but I’d agree TreeWalker probably isn’t a high priority item.

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