Code

Example with CKEditor WYSIWYG inline images field.

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

Draggable table Form Example

Step 1 : Form build

Example: settings for local environnement.

Create the local settings file : local.services.yml the add to local settings.php file

# Local service config

$settings['container_yamls'][] = DRUPAL_ROOT . '/sites/default/local.services.yml';

Step 1 : Add the package cweagans/composer-patches

composer require cweagans/composer-patches

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

States that can be applied to a form field element:

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

Drupal settings file can contains variable which can use to use for different configuration in different environments.

Example:

env_name

default_info_nid

$settings['env_name'] = 'Local';

$settings['default_info_nid'] = 1';

You can use IMCE to select a file.

Method 1 : Form hook_page_attachments