public function viewElements(FieldItemListInterface $items, $langcode) { $entity = $items->getEntity(); $elements = array(); foreach ($items as $delta => $item) { $value = $item->getValue(); // Replace the tokens with their respective values. $data = array(); foreach(unserialize($value['value']) as $key => $key_value) { $data[$key] = \Drupal::token()->replace($key_value, [$entity->getEntityTypeId() => $entity]); $data[$key] = preg_replace ('/<[^>]*>/', '', $data[$key]); } $elements[$delta] = [ '#theme' => 'raw_formatter', '#raw_value' => json_encode($data), ]; } return $elements; }