[regression since 9.1.1] navigation.top doesn't work with navigation.instant

[vedranmiletic]

Context

No response

Bug description

Navigation Back to top button doesn't work with instant loading enabled. The button appears normally, can be pressed normally (hover and pressing is correctly colored), but pressing it doesn't navigate you to the top of the page, the position on the page stays the same. Both Firefox and Chrome-based browsers (I have checked Brave on Linux and Chrome on Android) are affected.

I have additionally confirmed that there is no difference between pressing Back to top button on the initially loaded page and the first page loaded using instant loading (navigated using internal links). The position on the page stays the same in both cases.

This happens since version 9.1.1 and it might possibly be related to fixing #5023 via #5032. Version 9.1.0 works fine.

Related links

• Reporting a bug
• Instant loading
• Back-to-top button

Reproduction

example.zip

Steps to reproduce

1. Run mkdocs serve
2. Open http://127.0.0.1:8000/ in browser
3. Scroll down a bit
4. Scroll up a bit less so Back to top button appears, but you are not at the top
5. Press Back to top button

Browser

No response

Before submitting

• I have read and followed the bug reporting guidelines.
• I have attached links to the documentation, and possibly related issues and discussions.
• I assure that I have removed all customizations before submitting this bug report.
• I have attached a .zip file with a minimal reproduction.

[facelessuser]

I can confirm this behavior and have seen it recently in my documents as well.

[squidfunk]

Thanks for reporting, confirmed, definitely a regression and related to the recent instant loading refactoring.

[squidfunk]

Fixed in 9752ad2. So, the back-to-top button implementation was kind of meh, so I rewrote it to an actual button instead of a link that sets the scroll position imperatively, since it's only shown when JavaScript is available anyway.

[squidfunk]

Released as part of 9.1.3.