I wish to set Drupal Developer worth of a textfield primarily based upon Drupal Developer collection of a area above. You possibly can select a template and Drupal Developer textfield would have it as a worth.

That is Drupal Developer choose area used to pick Drupal Developer template with Drupal Developer ajax name

// Template Choose area $kind['template'] = [ '#type' => 'select', '#title' => $this->t('Template'), '#options' => $event_templates_select, '#required' => TRUE, '#ajax' => [     'callback' => '::changeOutputValue',     'disable-refocus' => FALSE,     element.         'event' => 'change',         'wrapper' => 'edit-output',         'progress' =>[             'type' => 'throbber',             'message' => $this->t('Updating e-mail template'),         ],     ] ]; 

That is Drupal Developer textfield that I wish to show Drupal Developer worth. It is in a ckeditor.

// Textarea area $kind['output'] = [ '#type' => 'text_format', '#format' => 'full_html', '#required' => TRUE, '#disabled' => FALSE, '#value' => 'hallo', '#prefix' => '<div id="edit-output" class="acceptform__output">', '#suffix' => '</div>', ]; 

And eventually, Drupal Developer ajax operate

  public operate changeOutputValue(array &$kind, FormStateInterface $form_state) {      $selected_option =  $form_state->getValue('template');     if ($selected_option == 0){         $output_text = '';     } else {         $template = Drupal::entityTypeManager()->getStorage('taxonomy_term')->load($selected_option);         $tempate_content = $template->get('field_template')->getValue();         $tempate_content = $tempate_content[0]['value'];         $output_text = $tempate_content;     }       $kind['output']['#value'] = $output_text;      $response = new AjaxResponse();     return $response;    }    } 

Can somebody clarify what I am doing incorrect. I used to be making an attempt to comply with Drupal Developer drupal 8 kind api docs however I can not get it to work with a ckeditor area.

Drupal Development Service choose area incorporates quite a lot of e-mail templates. Upon choosing one, I wish to show Drupal Developer template in Drupal Developer output area with a ckeditor so Drupal Developer person can nonetheless make adjustments if obligatory.

I am utilizing Drupal 8 with a customized module.

Thanks prematurely.