FormTestDescriptionForm.php in Zircon Profile 8.0        
                          
                  
                        
  
  
  
File
  core/modules/system/tests/modules/form_test/src/Form/FormTestDescriptionForm.php
  
    View source  
  <?php
namespace Drupal\form_test\Form;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
class FormTestDescriptionForm extends FormBase {
  
  public function getFormId() {
    return 'form_test_description_display';
  }
  
  public function buildForm(array $form, FormStateInterface $form_state) {
    $form['form_textfield_test_description_before'] = array(
      '#type' => 'textfield',
      '#title' => 'Textfield test for description before element',
      '#description' => 'Textfield test for description before element',
      '#description_display' => 'before',
    );
    $form['form_textfield_test_description_after'] = array(
      '#type' => 'textfield',
      '#title' => 'Textfield test for description after element',
      '#description' => 'Textfield test for description after element',
      '#description_display' => 'after',
    );
    $form['form_textfield_test_description_invisible'] = array(
      '#type' => 'textfield',
      '#title' => 'Textfield test for visually-hidden description',
      '#description' => 'Textfield test for visually-hidden description',
      '#description_display' => 'invisible',
    );
    return $form;
  }
  
  public function submitForm(array &$form, FormStateInterface $form_state) {
    
  }
}