Module development and code questions

Hi everyone. I am trying to create dependency fields in paragraphs. In Drupal 9.2 i can use hook_field_widget_WIDGET_TYPE_form_alter() but in Drupal > 9.2 i am having some problems....

When i use this hook: hook_field_widget_single_element_WIDGET_TYPE_form_alter that in theory replace hook_field_widget_WIDGET_TYPE_form_alter() i can't access to fields in $element['subform']....

Someone had the same problem ?

subform key looks like

Hi.
I'd like the child pages of the first page of a book not showing themself under that first page.

For example, on this page, I don't want the child page being under that first page because I already have a block showing them on the left.

I think I've just something to "cut" in some twig templates but I can manage to find where or what.

A little help would be appreciate.

Best regards.

D

When I ran 'tree' command on newly installed drupal 10 code. I see

5426 directories, 19085 files

Are all these folders really required at run time on production site?

Is it possible to omit some folders from production release ... in order to reduce number of files in the hosting account?

Please let me know.

Thanks

Drupal 10.1.6 version, trying to use token's in view custom css, but nothing working.

I added term id field to list, excluded from display, and on Title field: Style settings -> Custom field HTML -> Add HTML class -> added class [Term:id] (tried different variations) and it shows like - <span class="field-content -termid">. I need it to be <span class="field-content 3">.

Or maybe it's other way to do this?

This is again driving me mad half of the day. Since the new once plugin, things got harder.

I have dynamically generated elemsnts in a list i want to delete. Simple add/delete.

Everything works find but i have a problem on deleting the new added. The following code works fine but is fired MULTIPLE times. But as it seems once can not be used with document or window.

I am upgraded my site from 9.5 to 10.1.6.

The problem:

Whenever I do Clear All Cache from Admin Gui, it throws warnings as it cannot remove .../sites/default/files/css and .../sites/default/files/js directories

Status Report says:
The directory sites/default/files is not writable.

When I check file permissions they are as follows

drwxrwxr-x

What else do I need to correct in order to not get the above warning/error?

Thanks