$this->t('Color'),
'#type' => 'select',
'#options' => [
'red' => 'red',
'green' => 'green',
'blue' => 'blue',
],
'#ajax' => [
'callback' => [$object, 'selectCallback'],
],
'#suffix' => 'No color yet selected
',
];
$form['checkbox'] = [
'#type' => 'checkbox',
'#title' => $this->t('Test checkbox'),
'#ajax' => [
'callback' => [$object, 'checkboxCallback'],
],
'#suffix' => 'No action yet
',
];
$form['submit'] = [
'#type' => 'submit',
'#value' => $this->t('submit'),
];
// This is for testing invalid callbacks that should return a 500 error in
// \Drupal\Core\Form\FormAjaxResponseBuilderInterface::buildResponse().
$invalid_callbacks = [
'null' => NULL,
'empty' => '',
'nonexistent' => 'some_function_that_does_not_exist',
];
foreach ($invalid_callbacks as $key => $value) {
$form['select_' . $key . '_callback'] = [
'#type' => 'select',
'#title' => $this->t('Test %key callbacks', ['%key' => $key]),
'#options' => ['red' => 'red'],
'#ajax' => ['callback' => $value],
];
}
$form['test_group'] = [
'#type' => 'details',
'#title' => $this->t('Test group'),
'#open' => TRUE,
];
// Test ajax element in a #group.
$form['checkbox_in_group_wrapper'] = [
'#type' => 'container',
'#attributes' => ['id' => 'checkbox-wrapper'],
'#group' => 'test_group',
'checkbox_in_group' => [
'#type' => 'checkbox',
'#title' => $this->t('AJAX checkbox in a group'),
'#ajax' => [
'callback' => [$object, 'checkboxGroupCallback'],
'wrapper' => 'checkbox-wrapper',
],
],
'nested_group' => [
'#type' => 'details',
'#title' => $this->t('Nested group'),
'#open' => TRUE,
],
'checkbox_in_nested' => [
'#type' => 'checkbox',
'#group' => 'nested_group',
'#title' => $this->t('AJAX checkbox in a nested group'),
'#ajax' => [
'callback' => [$object, 'checkboxGroupCallback'],
'wrapper' => 'checkbox-wrapper',
],
],
];
$form['another_checkbox_in_nested'] = [
'#type' => 'checkbox',
'#group' => 'nested_group',
'#title' => $this->t('Another AJAX checkbox in a nested group'),
];
return $form;
}
/**
* {@inheritdoc}
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
}
}