schilke/functions.php

## functions.php
<?php
// This is the cleaner code per request of a thread in the LinkedIn group "WordPress"

// ...

// register and enqueue loadCSS
function load_scripts_and_styles() {

    // register loadCSS
    wp_register_script( 'load-css-async', get_stylesheet_directory_uri() . '/path/to/js/loadCSS.js', array(), '', false );

    // enqueue loadCSS
    wp_enqueue_script( 'load-css-async' );

}

add_action('wp_enqueue_scripts', 'load_scripts_and_styles', 999);

// ...
?>

## loadCSS.js
// This is the cleaner code per request of a thread in the LinkedIn group "WordPress"

// this is a modified file for demonstration purposes
// original repository https://github.com/filamentgroup/loadCSS/


/*!
loadCSS: load a CSS file asynchronously.
[c]2014 @scottjehl, Filament Group, Inc.
Licensed MIT
*/

function loadCSS( href, before, media ){
"use strict";
var ss = window.document.createElement( "link" );
var ref = before || window.document.getElementsByTagName( "script" )[ 0 ];
ss.rel = "stylesheet";
ss.href = href;
ss.media = "only x";
ref.parentNode.insertBefore( ss, ref );
setTimeout( function(){
ss.media = media || "all";
} );
return ss;
}

// here's where you specify the CSS files to be loaded asynchronously

// load Google Web Font
loadCSS( "http://fonts.googleapis.com/css?family=Lato|Open+Sans" );

// load Font Awesome from CDN
loadCSS( "//maxcdn.bootstrapcdn.com/font-awesome/4.1.0/css/font-awesome.min.css" );

// load a local CSS file
loadCSS( "http://yourserver.tld/path/to/your/css/file.css" );
	<?php
	// This is the cleaner code per request of a thread in the LinkedIn group "WordPress"

	// ...

	// register and enqueue loadCSS
	function load_scripts_and_styles() {

	// register loadCSS
	wp_register_script( 'load-css-async', get_stylesheet_directory_uri() . '/path/to/js/loadCSS.js', array(), '', false );

	// enqueue loadCSS
	wp_enqueue_script( 'load-css-async' );

	}

	add_action('wp_enqueue_scripts', 'load_scripts_and_styles', 999);

	// ...
	?>
	// This is the cleaner code per request of a thread in the LinkedIn group "WordPress"

	// this is a modified file for demonstration purposes
	// original repository https://github.com/filamentgroup/loadCSS/


	/*!
	loadCSS: load a CSS file asynchronously.
	[c]2014 @scottjehl, Filament Group, Inc.
	Licensed MIT
	*/

	function loadCSS( href, before, media ){
	"use strict";
	var ss = window.document.createElement( "link" );
	var ref = before \|\| window.document.getElementsByTagName( "script" )[ 0 ];
	ss.rel = "stylesheet";
	ss.href = href;
	ss.media = "only x";
	ref.parentNode.insertBefore( ss, ref );
	setTimeout( function(){
	ss.media = media \|\| "all";
	} );
	return ss;
	}

	// here's where you specify the CSS files to be loaded asynchronously

	// load Google Web Font
	loadCSS( "http://fonts.googleapis.com/css?family=Lato\|Open+Sans" );

	// load Font Awesome from CDN
	loadCSS( "//maxcdn.bootstrapcdn.com/font-awesome/4.1.0/css/font-awesome.min.css" );

	// load a local CSS file
	loadCSS( "http://yourserver.tld/path/to/your/css/file.css" );