php 推迟解析JS以加速WordPress网站。

Posted 2021-05-05

<?php 
//Defer parsing of JS to speed up loading pages
if (!(is_admin() )) {
	function defer_parsing_of_js ( $url ) {
		if ( FALSE === strpos( $url, '.js' ) ) return $url;
		if ( strpos( $url, 'jquery.js' ) ) return $url; //excluding js file
		return "$url' defer='defer";
	}
	add_filter( 'clean_url', 'defer_parsing_of_js', 11, 1 );
}
?>