Issue #3473621 by b.khouy, just_like_good_vibes, pdureau: The regexp for attribute props should allow more characters

Closes #3473621

src/Element/ComponentForm.php

@@ -263,11 +263,51 @@ class ComponentForm extends ComponentFormBase {
     return $sub_form;
   }
 
+  /**
+   * Open wrapped elements with errors.
+   *
+   * @param array $element
+   *   The element.
+   * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   The form state.
+   *
+   * @return bool
+   *   return TRUE if errors were found.
+   */
+  protected static function openWrappedElementsWithErrors(array &$element, FormStateInterface $form_state) : bool {
+    $errors = $form_state->getErrors();
+    if (count($errors) === 0) {
+      return FALSE;
+    }
+    $element_name = implode("][", $element["#parents"]);
+    $error_elements_found = FALSE;
+    foreach (array_keys($errors) as $error_name) {
+      if (!str_starts_with($error_name, $element_name)) {
+        continue;
+      }
+      $error_elements_found = TRUE;
+      $parents = array_slice(explode("][", $error_name), count($element["#parents"]));
+      if (count($parents) < 2) {
+        continue;
+      }
+      $parents_of_prop_or_slot = array_slice($parents, 0, 2);
+      $prop_or_slot = NestedArray::getValue($element, $parents_of_prop_or_slot);
+      if (!empty($prop_or_slot) && isset($prop_or_slot["#wrap"]) && $prop_or_slot["#wrap"]) {
+        $parents_of_prop_or_slot[] = $parents_of_prop_or_slot[1];
+        $parents_of_prop_or_slot[] = "#open";
+        NestedArray::setValue($element, $parents_of_prop_or_slot, TRUE);
+      }
+    }
+    return $error_elements_found;
+  }
+
   /**
    * Form element validation handler.
    */
   public static function validateFormElement(array &$element, FormStateInterface $form_state) : void {
-
+    if (static::openWrappedElementsWithErrors($element, $form_state)) {
+      return;
+    }
     try {
       $trigger_element = $form_state->getTriggeringElement();
       if (isset($trigger_element['#ui_patterns']) === FALSE) {