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<?php |
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/** |
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* Jetpack Assets package. |
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* |
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* @package automattic/jetpack-assets |
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*/ |
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namespace Automattic\Jetpack; |
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use Automattic\Jetpack\Constants as Jetpack_Constants; |
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/** |
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* Class Assets |
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*/ |
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class Assets { |
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/** |
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* Holds all the scripts handles that should be loaded in an async fashion. |
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* |
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* @var array |
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*/ |
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private $async_script_handles = array(); |
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/** |
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* The singleton instance of this class. |
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* |
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* @var Assets |
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*/ |
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protected static $instance; |
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/** |
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* Constructor. |
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* |
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* Static-only class, so nothing here. |
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*/ |
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private function __construct() {} |
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/** |
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* Get the singleton instance of the class. |
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* |
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* @return Assets |
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*/ |
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public static function instance() { |
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if ( ! isset( self::$instance ) ) { |
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self::$instance = new Assets(); |
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self::$instance->init_hooks(); |
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} |
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return self::$instance; |
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} |
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/** |
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* Initalize the hooks as needed. |
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*/ |
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private function init_hooks() { |
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/* |
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* Load some scripts asynchronously. |
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*/ |
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add_filter( 'script_loader_tag', array( $this, 'script_add_async' ), 10, 2 ); |
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} |
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/** |
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* A public method for adding the async script. |
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* |
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* @param string $script_handle Script handle. |
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*/ |
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public function add_async_script( $script_handle ) { |
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$this->async_script_handles[] = $script_handle; |
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} |
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/** |
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* Add an async attribute to scripts that can be loaded asynchronously. |
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* https://www.w3schools.com/tags/att_script_async.asp |
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* |
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* @param string $tag The <script> tag for the enqueued script. |
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* @param string $handle The script's registered handle. |
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*/ |
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public function script_add_async( $tag, $handle ) { |
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if ( empty( $this->async_script_handles ) ) { |
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return $tag; |
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} |
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if ( in_array( $handle, $this->async_script_handles, true ) ) { |
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return preg_replace( '/^<script /i', '<script async defer ', $tag ); |
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} |
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return $tag; |
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} |
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/** |
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* Given a minified path, and a non-minified path, will return |
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* a minified or non-minified file URL based on whether SCRIPT_DEBUG is set and truthy. |
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* |
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* Both `$min_base` and `$non_min_base` are expected to be relative to the |
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* root Jetpack directory. |
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* |
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* @since 5.6.0 |
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* |
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* @param string $min_path minified path. |
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* @param string $non_min_path non-minified path. |
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* @return string The URL to the file |
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*/ |
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public static function get_file_url_for_environment( $min_path, $non_min_path ) { |
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$path = ( Jetpack_Constants::is_defined( 'SCRIPT_DEBUG' ) && Jetpack_Constants::get_constant( 'SCRIPT_DEBUG' ) ) |
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? $non_min_path |
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: $min_path; |
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$url = plugins_url( $path, Jetpack_Constants::get_constant( 'JETPACK__PLUGIN_FILE' ) ); |
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/** |
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* Filters the URL for a file passed through the get_file_url_for_environment function. |
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* |
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* @since 8.1.0 |
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* |
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* @package assets |
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* |
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* @param string $url The URL to the file. |
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* @param string $min_path The minified path. |
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* @param string $non_min_path The non-minified path. |
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*/ |
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return apply_filters( 'jetpack_get_file_for_environment', $url, $min_path, $non_min_path ); |
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} |
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/** |
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* A helper function that lets you enqueue scripts in an async fashion. |
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* |
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* @param string $handle Name of the script. Should be unique. |
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* @param string $min_path Minimized script path. |
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* @param string $non_min_path Full Script path. |
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* @param array $deps Array of script dependencies. |
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* @param bool $ver The script version. |
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* @param bool $in_footer Should the script be included in the footer. |
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*/ |
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public static function enqueue_async_script( $handle, $min_path, $non_min_path, $deps = array(), $ver = false, $in_footer = true ) { |
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$assets_instance = self::instance(); |
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$assets_instance->add_async_script( $handle ); |
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wp_enqueue_script( $handle, self::get_file_url_for_environment( $min_path, $non_min_path ), $deps, $ver, $in_footer ); |
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} |
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} |
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Automattic /
jetpack
