I linked to https://hg.mozilla.org/mozilla-central/file/012853bd80b7/dom/webidl/XSLTProcessor.webidl in Blink's IDL files as the closest thing to a spec I could find. Neither of these are really good references though.

Is it better than nothing? I dunno, I kind of think not. @annevk?

Create a wiki page for it, like we did for DOM XPath?

Wow, all browsers support this. Yeah, a wiki page similar to https://wiki.whatwg.org/wiki/DOM_XPath and a bug against the DOM Standard. We should just define this.

@cvrebert is that something you would be interested in working on? Trying to figure out how to move forward here.

@annevk Nope. Sprucing up the MDN article was enough work already, and I'm not an XSLTProcessor user.

Created https://wiki.whatwg.org/wiki/DOM_XSLTProcessor.

is the action item to update this PR to point to https://wiki.whatwg.org/wiki/DOM_XSLTProcessor now?

I'm not sure, I was hoping someone else would make a call as to what is best here.

Hmm. I guess https://wiki.whatwg.org/wiki/DOM_XSLTProcessor is pretty good as it collates all known info in one place. Alternately maybe we should leave it with no reference.

Pointing to https://wiki.whatwg.org/wiki/DOM_XSLTProcessor sounds good, at the very least it's a block of IDL that can be compared against the implementation.

Okay, @cvrebert can you update the PR to point to that? Ta.

@annevk Done.

Excellent, thank you. Landed as f5540d3. Love all these little fixes.