­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ]*\s(rel\s*=\s*[\'"]stylesheet["\']))]*\shref\s*=\s*[\'"]([^\'"]+)[\'"](.*)>/iU' ), $buffer, $tags_match ); if ( ! isset( $tags_match[0] ) ) { return $buffer; } $noscripts = ''; foreach ( $tags_match[0] as $i => $tag ) { // Strip query args. $path = parse_url( $tags_match[2][ $i ] , PHP_URL_PATH ); // Check if this file should be deferred. if ( isset( $excluded_css[ $path ] ) ) { continue; } $preload = str_replace( 'stylesheet', 'preload', $tags_match[1][ $i ] ); $onload = str_replace( $tags_match[3][ $i ], ' as="style" onload=""' . $tags_match[3][ $i ] . '>', $tags_match[3][ $i ] ); $tag = str_replace( $tags_match[3][ $i ] . '>', $onload, $tag ); $tag = str_replace( $tags_match[1][ $i ], $preload, $tag ); $tag = str_replace( 'onload=""', 'onload="this.rel=\'stylesheet\'"', $tag ); $buffer = str_replace( $tags_match[0][ $i ], $tag, $buffer ); $noscripts .= ''; } $buffer = str_replace( '', $noscripts . '', $buffer ); return $buffer; } add_filter( 'rocket_buffer', 'rocket_async_css', 15 ); /** * Insert critical CSS in the * * @since 2.10 * @author Remy Perona */ function rocket_insert_critical_css() { global $pagenow; if ( ! get_rocket_option( 'async_css' ) ) { return; } if ( is_rocket_post_excluded_option( 'async_css' ) ) { return; } // Don't apply on wp-login.php/wp-register.php. if ( in_array( $pagenow, array( 'wp-login.php', 'wp-register.php' ), true ) ) { return; } // Don't apply if DONOTCACHEPAGE is defined. if ( defined( 'DONOTCACHEPAGE' ) && DONOTCACHEPAGE ) { return; } if ( defined( 'DONOTASYNCCSS' ) && DONOTASYNCCSS ) { return; } // Don't apply if user is logged-in and cache for logged-in user is off. if ( is_user_logged_in() && ! get_rocket_option( 'cache_logged_user' ) ) { return; } // This filter is documented in inc/front/process.php. $rocket_cache_search = apply_filters( 'rocket_cache_search', false ); // Don't apply on search page. if ( is_search() && ! $rocket_cache_search ) { return; } // Don't apply on excluded pages. if ( in_array( $_SERVER['REQUEST_URI'] , get_rocket_option( 'cache_reject_uri' , array() ), true ) ) { return; } // Don't apply on 404 page. if ( is_404() ) { return; } $critical_css = wp_kses( get_rocket_option( 'critical_css' ), array( '\'', '\"' ) ); $critical_css = str_replace( '>', '>', $critical_css ); echo ''; } add_action( 'wp_head', 'rocket_insert_critical_css', 1 ); /** * Insert loadCSS script in * * @since 2.10 * @author Remy Perona */ function rocket_insert_load_css() { global $pagenow; if ( ! get_rocket_option( 'async_css' ) ) { return; } if ( is_rocket_post_excluded_option( 'async_css' ) ) { return; } // Don't apply on wp-login.php/wp-register.php. if ( in_array( $pagenow, array( 'wp-login.php', 'wp-register.php' ), true ) ) { return; } // Don't apply if DONOTCACHEPAGE is defined. if ( defined( 'DONOTCACHEPAGE' ) && DONOTCACHEPAGE ) { return; } if ( defined( 'DONOTASYNCCSS' ) && DONOTASYNCCSS ) { return; } // Don't apply if user is logged-in and cache for logged-in user is off. if ( is_user_logged_in() && ! get_rocket_option( 'cache_logged_user' ) ) { return; } // This filter is documented in inc/front/process.php. $rocket_cache_search = apply_filters( 'rocket_cache_search', false ); // Don't apply on search page. if ( is_search() && ! $rocket_cache_search ) { return; } // Don't apply on excluded pages. if ( in_array( $_SERVER['REQUEST_URI'] , get_rocket_option( 'cache_reject_uri' , array() ), true ) ) { return; } // Don't apply on 404 page. if ( is_404() ) { return; } echo << /*! loadCSS. [c]2017 Filament Group, Inc. MIT License */ !function(a){"use strict";var b=function(b,c,d){function e(a){return h.body?a():void setTimeout(function(){e(a)})}function f(){i.addEventListener&&i.removeEventListener("load",f),i.media=d||"all"}var g,h=a.document,i=h.createElement("link");if(c)g=c;else{var j=(h.body||h.getElementsByTagName("head")[0]).childNodes;g=j[j.length-1]}var k=h.styleSheets;i.rel="stylesheet",i.href=b,i.media="only x",e(function(){g.parentNode.insertBefore(i,c?g:g.nextSibling)});var l=function(a){for(var b=i.href,c=k.length;c--;)if(k[c].href===b)return a();setTimeout(function(){l(a)})};return i.addEventListener&&i.addEventListener("load",f),i.onloadcssdefined=l,l(f),i};"undefined"!=typeof exports?exports.loadCSS=b:a.loadCSS=b}("undefined"!=typeof global?global:this); /*! loadCSS rel=preload polyfill. [c]2017 Filament Group, Inc. MIT License */ !function(a){if(a.loadCSS){var b=loadCSS.relpreload={};if(b.support=function(){try{return a.document.createElement("link").relList.supports("preload")}catch(b){return!1}},b.poly=function(){for(var b=a.document.getElementsByTagName("link"),c=0;c JS; } add_action( 'wp_head', 'rocket_insert_load_css', PHP_INT_MAX );