example.php

<?php
/* Async CSS */
add_filter( 'style_loader_tag', 'async_css_change_attribute', 10, 2 );
function async_css_change_attribute($link, $handle) {
	
	$marks = array(
		'hide-admin-bar-based-on-user-roles',
		'post-views-counter-frontend',
		'wsl-widget',
		'slick-theme',
		'slickstyle',
		'rgg-style',
		'rgg-simplelightbox',
		'mihdan-lite-youtube-embed',		
		);	
    if(in_array($handle, $marks)) {
        $link = str_replace( '\'all\'', '\'print\'', $link );
		$link = str_replace( '/>', 'onload="this.media=\'all\'" />', $link );
    }
    return $link;
}