Declaration of Select2::defaultConfiguration() must be compatible with FilterWidgetBase::defaultConfiguration()

As commented in the MR, the fixed code should be still compatible with BEF 6.x.

Added a patch for select2 version 8.x-1.15.

I updated the MR to allow BEF 6.

Thanks for the BEF 6 fix @damienmckenna

Could you also fix the sort widget for BEF 7 compatibility?

Thanks for spotting that. Done.

Working into the test failures.

FWIW I think the test failures are because the tests don't download the select2 library - the tests pass locally when I have the library in my codebase.

Reverting the issue status.

✨ BEF 7.0 compatible RTBC is a duplicate of this issue.

Patch in https://www.drupal.org/project/select2/issues/3482698#comment-15827078 🐛 Select2 Plugin is not compatible with BEF plugin Active fixes this issue for BEF 7.* for me

I can confirm the patch in this issue fixes the issue for me thus far.

Hi, I am facing the same issue with using select2 1.15 with bef 7.0.2 on drupal 10.3.6

However when applying the MR on my drupal site.
I am facing an issue.

[ErrorException]                                               
  foreach() argument must be of type array|object, string given 

Can confirm #6 is working for me.