Re: [w3c/ServiceWorker] consider Client behavior for windows where initial about:blank is replaced with a loaded document (#1091)

@annevk, I'm trying to find a way during the [Handle Fetch](https://w3c.github.io/ServiceWorker/#handle-fetch) to see whether the navigate request is from the initial about:blank client. We want to set .resultingClientId to the initial client's id in this case. (Please read from https://github.com/w3c/ServiceWorker/issues/1091#issuecomment-311013742 for background.)

I couldn't come up with any good way other than thinking about something similar to https://html.spec.whatwg.org/#initialise-the-document-object step 1:

> If browsingContext's only entry in its session history is the about:blank Document that was added when browsingContext was created

But I don't think that's a proper way as it'd reference the request's client's browsing context from a task in the SW's event loop. Would that be okay?

Adding a state to an environment settings object to tell it's tied to the initial about:blank Document seems to be an option. But I know we don't want to add one if that's avoidable. Do you have any idea?

-- 
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/ServiceWorker/issues/1091#issuecomment-311895380