navigation.expand animates expansion on first load

[eleanor-arc-boats]

Context

No response

Bug description

I noticed that the left-side navigation will animate the expansion on first load - is this the intended behavior? Screen cap showing what I see. This is on Firefox v119 on Ubuntu. Using the latest mkdocs-material 9.4.7, disabled all customization.

Screencast.from.10-30-2023.01.12.06.PM.webm

Related links

• Reporting a bug
• Navigation Expansion Flag

Reproduction

9.4.7-nav-expansion-animates-on-load.zip

Steps to reproduce

1. Notice that on first load the table of contents / navigation animates the nested sections from collapsed to expanded

Browser

Firefox

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.

[squidfunk]

Thanks for reporting. Indeed, this is a change in behavior that was introduced because we added animations in 9.4.2. It should definitely not animate on the first load. To temporary mitigate, downgrade to 9.4.1, or disable navigation.expand.

[eleanor-arc-boats]

Thanks for investigating. As it turns out downgrading to 9.4.1 seems to break the pydownx emoji extension, so I'll wait until there's a fix.

[squidfunk]

Fixed in dcc296e.

[squidfunk]

Released as part of 9.4.10.