Some modules (Block field) can use the category on the plugin blocks to list and expose them as configuation. This is what does the module block_field which provide a new field type which allows to embed plugin block.
This module allows us to defini which block will be exposed, and we can enable block per block or per category.
But as our block plugin doesn't provide a category in their definition, then Core fallback to the human readable module name (See Drupal\Core\Plugin\CategorizingPluginManagerTrait::processDefinitionCategory(&$definition)), and then we get a select list with "TOC.js" as a value, and we can't save anymore the field configuration form, because dot are not allowed :
La tentative de mise à jour du champ Block a échoué : Toc.js key contains a dot which is not supported..
Install block_field module
Add a block_field field type on any entity type
Configure this field, and selec the blocks to expose per category.
You can't save the form.
Add a category on the plugon block provided by Toc.js, category without a dot of course.
No
No
No
Active
3.1
Code
Issue #3507983 by flocondetoile: Provide a category for plugin block
There's no hurry. It can wait if other small bug fixes crop up soon. I'll let you decide.
Automatically closed - issue fixed for 2 weeks with no activity.