Does not work with Bootstrap 4

Hey @dadderley thanks for reporting this, I'll have a look on this today.

Hey @dadderley , could you post some screens? What did you see in the console log?

Thanks for your reply.

This is a fresh install of Drupal 11.2.2 with no custom js or css.

This is the default theme: https://www.drupal.org/project/bootstrap4 → .
This is installed: https://www.drupal.org/project/jquery_deprecated_functions →

With this theme the dropdown menus and hamburger menus do not work.
Also the Slick Carousel, https://www.drupal.org/project/slick → , does not work.

For both the homepage and the views page with the display set to 'Slick Carousel' I get this error in the Console

When I use Bootstrap 5 as the default theme, it all works.

I have several sites where I still use Bootstrap 4 as the base theme. I know I should update them to Bootstrap 5, but I don't have the time right now.

Thanks in advance.

Open your page, open the console, enter jQuery.fn.jquery - what does it say?

Most likely Bootstrap4 is shipped with another jQuery package.

Typed in: jQuery.fn.jquery
Response: '4.0.0-beta.2'

Strange, I was expecting more than one jquery version.
I'll do some checks myself.

Not sure if this helps, but BS v4 is detecting the jQuery version and throwing an error: https://github.com/twbs/bootstrap/blob/v4.6.2/js/src/util.js#L186-L188