Drupal 9

Example with CKEditor WYSIWYG inline images field.

Also see : Create a Form with Drupal 8 using Form API

1. Update drupal core and contrib odules to the last version
Example with composer if you use core-recommended:
composer update  drupal/core-recommended:9.3.14 -W

2. Perform Regular Backups of the files and database.
You can use Backup and Migrate module

Draggable table Form Example

Step 1 : Form build

Doc : https://www.drupal.org/docs/drupal-apis/form-api/conditional-form-fields

States that can be applied to a form field element:

Add following packages to composer.json file next to drupal repository

PHP Class using StringTranslationTrait

StringTranslationTrait allow to get t() and formatPlural() methods
Example:
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\Core\StringTranslation\TranslationInterface;
class MyClass {


Import configuration file programmatically on Drupal 9 using config_update contrib module and service

//Update Module settings
\Drupal::service('config_update.config_update')->revert('system.simple', 'mymodule.settings');

State servic eallow to store variables such as state of the server temporarily or permanently

Examples:

Symptoms

You may have error messages like:

You can use IMCE to select a file.