2 * Implements hook_form_BASE_FORM_ID_alter().
4 function {{ machine_name }}_form_BASE_FORM_ID_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) {
5 // Modification for the form with the given BASE_FORM_ID goes here. For
6 // example, if BASE_FORM_ID is "node_form", this code would run on every
7 // node form, regardless of node type.
9 // Add a checkbox to the node form about agreeing to terms of use.
10 $form['terms_of_use'] = [
11 '#type' => 'checkbox',
12 '#title' => t("I agree with the website's terms and conditions."),