Drop calculation callback if no calculated field exists

Author: Dominic Tubach

src/Form/Control/Callbacks/RecalculateCallback.php

@@ -39,6 +39,21 @@ public static function addAjaxCommands(AjaxResponse $response, FormStateInterfac
     RecalculateCallbackUtil::addAjaxCommands($response, $formState, $oldData, $newData);
   }
 
+  /**
+   * @param array<int|string, mixed> $element
+   *
+   * @return array<int|string, mixed>
+   */
+  public static function processElement(array $element, FormStateInterface $formState): array {
+    if (TRUE !== $formState->get('$calculateUsed')) {
+      if (is_array($element['#ajax'] ?? NULL) && [static::class, 'onChange'] === $element['#ajax']['callback']) {
+        unset($element['#ajax']);
+      }
+    }
+
+    return $element;
+  }
+
   /**
    * @phpstan-param array<int|string, mixed> $form $form
    */

src/Form/Control/Util/BasicFormPropertiesFactory.php

@@ -138,6 +138,9 @@ public static function createFieldProperties(ControlDefinition $definition, Form
         'progress' => [],
         'disable-refocus' => TRUE,
       ];
+      $form['#process'] = [
+        [RecalculateCallback::class, 'processElement'],
+      ];
     }
 
     $form += static::createBasicProperties($definition);