[w3c/DOM-Parsing] Improve definition of URL for Documents created by DOMParser (#46)

The spec currently refers to the "active document", which is a property of a browsing context. However, it doesn't define which browsing context it's getting the "active document" from.

However, this doesn't appear to be the correct concept in the first place. Gecko, Chrome and WebKit all seem to use the URL of the [relevant global](https://html.spec.whatwg.org/multipage/webappapis.html#concept-relevant-global)'s [associated Document](https://html.spec.whatwg.org/multipage/window-object.html#concept-document-window).

In particular, this difference is significant if the browsing context is navigated. In that case, the "active document" would change, and the spec would suggest using the URL the BC was navigated to. All browsers I tested use the pre-navigation URL instead.

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/w3c/DOM-Parsing/issues/46