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<?php
declare(strict_types=1);
namespace WP_Rocket\Engine\Optimization\DeferJS;
use WP_Rocket\Event_Management\Subscriber_Interface;
class Subscriber implements Subscriber_Interface {
/**
* DeferJS instance
*
* @var DeferJS
*/
private $defer_js;
/**
* Instantiate the class
*
* @param DeferJS $defer_js DeferJS instance.
*/
public function __construct( DeferJS $defer_js ) {
$this->defer_js = $defer_js;
}
/**
* Returns array of events this listen to.
*
* @return array
*/
public static function get_subscribed_events(): array {
return [
'rocket_buffer' => [
[ 'defer_js', 24 ],
[ 'defer_inline_js', 25 ],
],
'rocket_exclude_js' => 'exclude_jquery_combine',
'rocket_minify_excluded_external_js' => 'exclude_jquery_combine',
];
}
/**
* Adds the defer attribute to JS files
*
* @since 3.8
*
* @param string $html HTML content.
* @return string
*/
public function defer_js( string $html ): string {
return $this->defer_js->defer_js( $html );
}
/**
* Defers inline JS containing jQuery calls
*
* @since 3.8
*
* @param string $html HTML content.
* @return string
*/
public function defer_inline_js( string $html ): string {
return $this->defer_js->defer_inline_js( $html );
}
/**
* Excludes jQuery from combine JS when defer and combine are enabled
*
* @since 3.8
*
* @param array $excluded_files Array of excluded files from combine JS.
* @return array
*/
public function exclude_jquery_combine( array $excluded_files ): array {
return $this->defer_js->exclude_jquery_combine( $excluded_files );
}
}
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