2 * Implements hook_field_widget_third_party_settings_form().
4 function {{ machine_name }}_field_widget_third_party_settings_form(\Drupal\Core\Field\WidgetInterface $plugin, \Drupal\Core\Field\FieldDefinitionInterface $field_definition, $form_mode, $form, \Drupal\Core\Form\FormStateInterface $form_state) {
6 // Add a 'my_setting' checkbox to the settings form for 'foo_widget' field
8 if ($plugin->getPluginId() == 'foo_widget') {
9 $element['my_setting'] = [
10 '#type' => 'checkbox',
11 '#title' => t('My setting'),
12 '#default_value' => $plugin->getThirdPartySetting('my_module', 'my_setting'),