Define the origin of the documents returned from DOMParser

[Ms2ger]

No description provided.

[annevk]

If we don't define it then it would just be the default, an opaque origin. Seems okayish? Did you test implementations?

[Ms2ger]

Does that mean you can't access the DOM of it at all?

[annevk]

I don't think so. We use the origin of the global for that, no?

[domenic]

@annevk @Ms2ger what does this affect, in documents without a browsing context? What tests could we write for this?

[annevk]

document.origin, I guess, but see whatwg/dom#410. I'm actually not sure how this could be tested. (See whatwg/html#2697 (comment) for why we have it nonetheless, but testing that does require a browsing context as far as I can tell.)

[domenic]

Given that we're removing document.origin, it seems this is unobservable and so leaving it at its default value is fine. I'll close this, but if you think we should add a note explaining that we're leaving it at its default value to whatwg/html#5190, please comment over there.