3 namespace Drupal\form_test\Form;
5 use Drupal\Core\Form\FormBase;
6 use Drupal\Core\Form\FormStateInterface;
9 * Builds a simple form to test the #group property on #type 'vertical_tabs'.
13 class FormTestGroupVerticalTabsForm extends FormBase {
18 public function getFormId() {
19 return 'form_test_group_vertical_tabs';
25 public function buildForm(array $form, FormStateInterface $form_state) {
26 $form['vertical_tabs'] = [
27 '#type' => 'vertical_tabs',
31 '#title' => 'First group element',
32 '#group' => 'vertical_tabs',
34 $form['meta']['element'] = [
35 '#type' => 'textfield',
36 '#title' => 'First nested element in details element',
40 '#title' => 'Second group element',
41 '#group' => 'vertical_tabs',
43 $form['meta_2']['element_2'] = [
44 '#type' => 'textfield',
45 '#title' => 'Second nested element in details element',
53 public function submitForm(array &$form, FormStateInterface $form_state) {