Make libraries with JS internal, at least for beta

Really good idea, thanks Ben!

Agreed on having everything internal. Can we make the css-only libraries internal too? just in case. We can always make not internal for stable realease.

I would define floating ui as internal too, it's in the assets folder but it's not defined in core libraries hence shouldn't be relied upon just yet. I wouldn't want contrib to start depending on navigation/floating-ui. If we don't want to make that internal, that needs to go in core.libraries.yml

Other than that, +1

+1 from me too. One question though - if the CSS libraries are marked internal, will that affect the Gin integration? Beta stability would allow us to make any CSS changes we like IMO whether the CSS libraries are internal or not.

It doesn't look like Gin is integrating with the Navigation through the libraries so it should be fine. I tested Gin manually with the patch and I didn't find any regressions.

Committed/pushed to 11.x and cherry-picked to 10.4.x and 10.3.x, thanks!

Automatically closed - issue fixed for 2 weeks with no activity.