I don't like some default behavior of the select2 widget/filters and would love to have the possibility to change the default select2 settings for all usages of this module. For example, I think it's unnecessary to show the search box if the select element has less than 10 options.
The default setting for this in select2 is "minimumResultsForSearch" = 0.
As you don't override this option in your Select2 Element, I would love to have a module configuration page where I can set my own defaults that could be merged with your settings array.
I don't want to override the settings for every single field with a library that gets attached to the field as you described in the documentation. That's fine if I need to change the config for a single field but not to set the default config for all fields.
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