Загрузка скриптов для wordpress

/*function to add async and defer attributes*/
function defer_js_async($tag){

## 1: list of scripts to defer.
$scripts_to_defer = array('script-name1.js', 'script-name2.js', 'script-name3.js');
## 2: list of scripts to async.
$scripts_to_async = array('script-name1.js', 'script-name2.js', 'script-name3.js');
 
#defer scripts
foreach($scripts_to_defer as $defer_script){
	if(true == strpos($tag, $defer_script ) )
	return str_replace( ' src', ' defer="defer" src', $tag );	
}
#async scripts
foreach($scripts_to_async as $async_script){
	if(true == strpos($tag, $async_script ) )
	return str_replace( ' src', ' async="async" src', $tag );	
}
return $tag;
}
add_filter( 'script_loader_tag', 'defer_js_async', 10 );