Module development and code questions

Hey,

Need some help or guidelines , we have a huge list of drop down and kind of difficult for the users to scroll so wanted to check how we can create a searchable drop down. 

I did search the forums but could not find anything so reaching out to you to help me in this.

for now I tried POC with the form Type "select".

And suggestions are appreciated.

I've been trying to move the moderation_state field into the sidebar below the revision log message. I've successfully managed to move it into the revision_information section so that they are together by doing

I'm studying to develop Drupal 10 modules, I created the classic "Hello world" module implementing it with a custom string to display on a specific page.

The value is stored correctly but in the page that should display it I always see the cached value, if I clear the entire Drupal cache I see the real stored value.

In my DefaultController.php I read the value link this:

I am trying to spinup a new site with Drupal 10 and keep getting the following error:

"The website encountered an unexpected error. Please try again later."

Server side is clean, DNS and such is all correct.

First time the only change to a fresh D10 site was to change the name of the site. Everything worked at the end of the day, then next day I get the above error. I reinstalled a fresh instance of D10 because I hadnt made any real changes.

I have a custom module which implements a form using the Form API buildForm.

The form contains fields for user input and field which contain values calculated from user input fields via Ajax callbacks.

The use can enter values into the fields and the calculated field are correctly calculated and display appropriately in the form.

Hi,

For my current site I need some help in understanding best approach or Drupal standards.