fix: update page store when URL hash is changed from the address bar

[plbstl]

Fixes #9374.

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[benmccann]

https://github.com/sveltejs/kit/pull/9548 looks to be addressing the same issue

[plbstl]

The draft went stale. I figured out how to resolve the issue and implement the necessary tests

[dummdidumm]

Reading this section on MDN it says: "Browsers tend to handle the popstate event differently on page load. Chrome (prior to v34) and Safari always emit a popstate event on page load, but Firefox doesn't."

--> Could someone who has access to Safari check whether or not this change results in an unwanted update of the page store on initial page load? Because that shouldn't happen, and if it does, we need some additional boolean I guess to not fire on first page load.

As for the TODO in the code: I think doing it in the else block is correct, you can remove that comment.

[teemingc]

Safari always emit a popstate event on page load

This doesn't happen for me on MacOS Safari 17.

[plbstl]

Could someone who has access to Safari check whether or not this change results in an unwanted update of the page store on initial page load?

I just checked with Safari on iOS and MacOS, there is no unwanted update of the page store on initial page load.

Safari always emit a popstate event on page load

This doesn't happen to me on Safari 16.5.1 (iOS and MacOS).

As for the TODO in the code: I think doing it in the else block is correct, you can remove that comment.

Okay, thank you for the feedback.