public function DynamicFormSections::promptCallback in Examples for Developers 3.x

Same name and namespace in other branches

1. 8 ajax_example/src/Form/DynamicFormSections.php \Drupal\ajax_example\Form\DynamicFormSections::promptCallback()

Callback for the select element.

Since the questions_fieldset part of the form has already been built during the AJAX request, we can return only that part of the form to the AJAX request, and it will insert that part into questions-fieldset-wrapper.

Parameters

array $form: An associative array containing the structure of the form.

\Drupal\Core\Form\FormStateInterface $form_state: The current state of the form.

Return value

array The form structure.

File

modules/ajax_example/src/Form/DynamicFormSections.php, line 219

Class

DynamicFormSections

Dynamically-enabled form with graceful no-JS degradation.

Namespace

Drupal\ajax_example\Form

Code

public function promptCallback(array $form, FormStateInterface $form_state) {
  return $form['questions_fieldset'];
}