[WP] Add async, defer and origin attributes to WordPress scripts

wp_scripts.php

<?php

// Place the handles somewhere convenient
global $scripts_to_defer, $scripts_to_async, $scripts_origin;
$scripts_to_defer = array('fancybox_js', 'bootstrap_js');
$scripts_to_async = array('fontawesome_js');
$scripts_origin = array('fontawesome_js');

// Put this in functions.php
function add_defer_attribute($tag, $handle) {
	global $scripts_to_defer;
	//$scripts_to_defer = array('my-js-handle', 'another-handle');
	
	foreach($scripts_to_defer as $defer_script) {
	   if ($defer_script === $handle) {
		  return str_replace(' src', ' defer="defer" src', $tag);
	   }
	}
	return $tag;
 }
 add_filter('script_loader_tag', 'add_defer_attribute', 10, 2);

 function add_async_attribute($tag, $handle) {
	global $scripts_to_async;
	//$scripts_to_async = array('my-js-handle', 'another-handle');
	
	foreach($scripts_to_async as $async_script) {
	   if ($async_script === $handle) {
		  return str_replace(' src', ' async="async" src', $tag);
	   }
	}
	return $tag;
 }
 add_filter('script_loader_tag', 'add_async_attribute', 11, 2);

 function add_origin_attribute($tag, $handle) {
	global $scripts_origin;
	//$scripts_origin = array('my-js-handle', 'another-handle');
	
	foreach($scripts_origin as $origin) {
	   if ($origin === $handle) {
		  return str_replace(' src', ' origin="anonymous" src', $tag);
	   }
	}
	return $tag;
 }
 add_filter('script_loader_tag', 'add_origin_attribute', 12, 2);

?>