function THEME_preprocess_entity(&$variables) {
  if (isset($variables['paragraphs_item']->bundle) && variables['paragraphs_item']->bundle == "XXXXX") {
   $variables["elements"]["#attached"]['js'][] = array(
                'type' => 'file',
                'data' => 'myfile.js',
              );
      }
    }

$variables['#attached']['js'][] = 'myfile.js';

$variables['#attached']['library'][] = 'myfile.js';