<?php
declare(strict_types=1);
namespace WP_Rocket\Engine\Optimization\DelayJS;
use WP_Rocket\Admin\Options_Data;
class HTML {
/**
* Plugin options instance.
*
* @since 3.7
*
* @var Options_Data
*/
protected $options;
/**
* Array of excluded patterns from delay JS
*
* @since 3.9
*
* @var array
*/
protected $excluded = [
'nowprocket',
'/wp-includes/js/wp-embed.min.js',
'lazyLoadOptions',
'lazyLoadThumb',
'wp-rocket/assets/js/lazyload/(.*)',
'et_core_page_resource_fallback',
'window.\$us === undefined',
'js-extra',
'fusionNavIsCollapsed',
'/assets/js/smush-lazy-load.min.js',
'eio_lazy_vars',
'/ewww-image-optimizer/includes/lazysizes.min.js',
'/ewww-image-optimizer-cloud/includes/lazysizes.min.js',
'document\.body\.classList\.remove\("no-js"\)',
'document\.documentElement\.className\.replace\( \'no-js\', \'js\' \)',
'et_animation_data',
'wpforms_settings',
'var nfForms',
];
/**
* Creates an instance of HTML.
*
* @since 3.7
*
* @param Options_Data $options Plugin options instance.
*/
public function __construct( Options_Data $options ) {
$this->options = $options;
}
/**
* Adjust HTML to have delay js structure.
*
* @since 3.9 Updated to use exclusions list instead of inclusions list.
* @since 3.7
*
* @param string $html Buffer html for the page.
*
* @return string
*/
public function delay_js( $html ): string {
if ( ! $this->is_allowed() ) {
return $html;
}
$this->excluded = array_merge( $this->excluded, $this->options->get( 'delay_js_exclusions', [] ) );
/**
* Filters the delay JS exclusions array
*
* @since 3.9
*
* @param array $excluded Array of excluded patterns.
*/
$this->excluded = apply_filters( 'rocket_delay_js_exclusions', $this->excluded );
$this->excluded = array_map(
function( $value ) {
return str_replace(
[ '+', '?ver', '#' ],
[ '\+', '\?ver', '\#' ],
$value
);
},
$this->excluded
);
return $this->parse( $html );
}
/**
* Checks if is allowed to Delay JS.
*
* @since 3.7
*
* @return bool
*/
public function is_allowed(): bool {
if ( rocket_bypass() ) {
return false;
}
if ( rocket_get_constant( 'DONOTROCKETOPTIMIZE' ) ) {
return false;
}
if ( is_rocket_post_excluded_option( 'delay_js' ) ) {
return false;
}
return (bool) $this->options->get( 'delay_js', 0 );
}
/**
* Gets Javascript to redirect IE visitors to the uncached page
*
* @since 3.9
*
* @return string
*/
public function get_ie_fallback(): string {
return 'if(navigator.userAgent.match(/MSIE|Internet Explorer/i)||navigator.userAgent.match(/Trident\/7\..*?rv:11/i)){var href=document.location.href;if(!href.match(/[?&]nowprocket/)){if(href.indexOf("?")==-1){if(href.indexOf("#")==-1){document.location.href=href+"?nowprocket=1"}else{document.location.href=href.replace("#","?nowprocket=1#")}}else{if(href.indexOf("#")==-1){document.location.href=href+"&nowprocket=1"}else{document.location.href=href.replace("#","&nowprocket=1#")}}}}';
}
/**
* Parse the html and add/remove attributes from specific scripts.
*
* @since 3.7
*
* @param string $html Buffer html for the page.
*
* @return string
*/
private function parse( $html ): string {
$replaced_html = preg_replace_callback( '/<\s*script\s*(?<attr>[^>]*?)?>(?<content>.*?)?<\s*\/\s*script\s*>/ims', [ $this, 'replace_scripts' ], $html );
if ( empty( $replaced_html ) ) {
return $html;
}
return $replaced_html;
}
/**
* Callback method for preg_replace_callback that is used to adjust attributes for scripts.
*
* @since 3.9 Use exclusions list & fake type attribute.
* @since 3.7
*
* @param array $matches Matches array for scripts regex.
*
* @return string
*/
public function replace_scripts( $matches ): string {
foreach ( $this->excluded as $pattern ) {
if ( preg_match( "#{$pattern}#i", $matches[0] ) ) {
return $matches[0];
}
}
$matches['attr'] = trim( $matches['attr'] );
$delay_js = $matches[0];
if ( ! empty( $matches['attr'] ) ) {
if ( false !== strpos( $matches['attr'], 'application/ld+json' ) ) {
return $matches[0];
}
$delay_attr = preg_replace( '/type=(["\'])(.*?)\1/i', 'data-rocket-$0', $matches['attr'], 1 );
if ( null !== $delay_attr ) {
$delay_js = preg_replace( '#' . preg_quote( $matches['attr'], '#' ) . '#i', $delay_attr, $matches[0], 1 );
}
}
return preg_replace( '/<script/i', '<script type="rocketlazyloadscript"', $delay_js, 1 );
}
}