Validates the behavior fields form.
This method is responsible for validating the data in the behavior fields form and displaying validation messages.
\Drupal\paragraphs\ParagraphInterface $paragraph: The paragraph.
array $form: An associative array containing the initial structure of the plugin form.
\Drupal\Core\Form\FormStateInterface $form_state: The current state of the form.
Overrides ParagraphsBehaviorBase::validateBehaviorForm
public function validateBehaviorForm(ParagraphInterface $paragraph, array &$form, FormStateInterface $form_state) {
if ($form_state
->getValue('text_color') != 'blue' && $form_state
->getValue('text_color') != 'red') {
$form_state
->setError($form, 'The only allowed values are blue and red.');
}
}