File Content: class-wp-script-modules.php <?php /** * Script Modules API: WP_Script_Modules class. * * Native support for ES Modules and Import Maps. * * @package WordPress * @subpackage Script Modules */ /** * Core class used to register script modules. * * @since 6.5.0 */ class WP_Script_Modules { /** * Holds the registered script modules, keyed by script module identifier. * * @since 6.5.0 * @var array[] */ private $registered = array(); /** * Holds the script module identifiers that were enqueued before registered. * * @since 6.5.0 * @var array<string, true> */ private $enqueued_before_registered = array(); /** * Tracks whether the @wordpress/a11y script module is available. * * Some additional HTML is required on the page for the module to work. Track * whether it's available to print at the appropriate time. * * @since 6.7.0 * @var bool */ private $a11y_available = false; /** * Registers the script module if no script module with that script module * identifier has already been registered. * * @since 6.5.0 * * @param string $id The identifier of the script module. Should be unique. It will be used in the * final import map. * @param string $src Optional. Full URL of the script module, or path of the script module relative * to the WordPress root directory. If it is provided and the script module has * not been registered yet, it will be registered. * @param array $deps { * Optional. List of dependencies. * * @type string|array ...$0 { * An array of script module identifiers of the dependencies of this script * module. The dependencies can be strings or arrays. If they are arrays, * they need an `id` key with the script module identifier, and can contain * an `import` key with either `static` or `dynamic`. By default, * dependencies that don't contain an `import` key are considered static. * * @type string $id The script module identifier. * @type string $import Optional. Import type. May be either `static` or * `dynamic`. Defaults to `static`. * } * } * @param string|false|null $version Optional. String specifying the script module version number. Defaults to false. * It is added to the URL as a query string for cache busting purposes. If $version * is set to false, the version number is the currently installed WordPress version. * If $version is set to null, no version is added. */ public function register( string $id, string $src, array $deps = array(), $version = false ) { if ( ! isset( $this->registered[ $id ] ) ) { $dependencies = array(); foreach ( $deps as $dependency ) { if ( is_array( $dependency ) ) { if ( ! isset( $dependency['id'] ) ) { _doing_it_wrong( __METHOD__, __( 'Missing required id key in entry among dependencies array.' ), '6.5.0' ); continue; } $dependencies[] = array( 'id' => $dependency['id'], 'import' => isset( $dependency['import'] ) && 'dynamic' === $dependency['import'] ? 'dynamic' : 'static', ); } elseif ( is_string( $dependency ) ) { $dependencies[] = array( 'id' => $dependency, 'import' => 'static', ); } else { _doing_it_wrong( __METHOD__, __( 'Entries in dependencies array must be either strings or arrays with an id key.' ), '6.5.0' ); } } $this->registered[ $id ] = array( 'src' => $src, 'version' => $version, 'enqueue' => isset( $this->enqueued_before_registered[ $id ] ), 'dependencies' => $dependencies, ); } } /** * Marks the script module to be enqueued in the page. * * If a src is provided and the script module has not been registered yet, it * will be registered. * * @since 6.5.0 * * @param string $id The identifier of the script module. Should be unique. It will be used in the * final import map. * @param string $src Optional. Full URL of the script module, or path of the script module relative * to the WordPress root directory. If it is provided and the script module has * not been registered yet, it will be registered. * @param array $deps { * Optional. List of dependencies. * * @type string|array ...$0 { * An array of script module identifiers of the dependencies of this script * module. The dependencies can be strings or arrays. If they are arrays, * they need an `id` key with the script module identifier, and can contain * an `import` key with either `static` or `dynamic`. By default, * dependencies that don't contain an `import` key are considered static. * * @type string $id The script module identifier. * @type string $import Optional. Import type. May be either `static` or * `dynamic`. Defaults to `static`. * } * } * @param string|false|null $version Optional. String specifying the script module version number. Defaults to false. * It is added to the URL as a query string for cache busting purposes. If $version * is set to false, the version number is the currently installed WordPress version. * If $version is set to null, no version is added. */ public function enqueue( string $id, string $src = '', array $deps = array(), $version = false ) { if ( isset( $this->registered[ $id ] ) ) { $this->registered[ $id ]['enqueue'] = true; } elseif ( $src ) { $this->register( $id, $src, $deps, $version ); $this->registered[ $id ]['enqueue'] = true; } else { $this->enqueued_before_registered[ $id ] = true; } } /** * Unmarks the script module so it will no longer be enqueued in the page. * * @since 6.5.0 * * @param string $id The identifier of the script module. */ public function dequeue( string $id ) { if ( isset( $this->registered[ $id ] ) ) { $this->registered[ $id ]['enqueue'] = false; } unset( $this->enqueued_before_registered[ $id ] ); } /** * Removes a registered script module. * * @since 6.5.0 * * @param string $id The identifier of the script module. */ public function deregister( string $id ) { unset( $this->registered[ $id ] ); unset( $this->enqueued_before_registered[ $id ] ); } /** * Adds the hooks to print the import map, enqueued script modules and script * module preloads. * * In classic themes, the script modules used by the blocks are not yet known * when the `wp_head` actions is fired, so it needs to print everything in the * footer. * * @since 6.5.0 */ public function add_hooks() { $position = wp_is_block_theme() ? 'wp_head' : 'wp_footer'; add_action( $position, array( $this, 'print_import_map' ) ); add_action( $position, array( $this, 'print_enqueued_script_modules' ) ); add_action( $position, array( $this, 'print_script_module_preloads' ) ); add_action( 'admin_print_footer_scripts', array( $this, 'print_import_map' ) ); add_action( 'admin_print_footer_scripts', array( $this, 'print_enqueued_script_modules' ) ); add_action( 'admin_print_footer_scripts', array( $this, 'print_script_module_preloads' ) ); add_action( 'wp_footer', array( $this, 'print_script_module_data' ) ); add_action( 'admin_print_footer_scripts', array( $this, 'print_script_module_data' ) ); add_action( 'wp_footer', array( $this, 'print_a11y_script_module_html' ), 20 ); add_action( 'admin_print_footer_scripts', array( $this, 'print_a11y_script_module_html' ), 20 ); } /** * Prints the enqueued script modules using script tags with type="module" * attributes. * * @since 6.5.0 */ public function print_enqueued_script_modules() { foreach ( $this->get_marked_for_enqueue() as $id => $script_module ) { wp_print_script_tag( array( 'type' => 'module', 'src' => $this->get_src( $id ), 'id' => $id . '-js-module', ) ); } } /** * Prints the the static dependencies of the enqueued script modules using * link tags with rel="modulepreload" attributes. * * If a script module is marked for enqueue, it will not be preloaded. * * @since 6.5.0 */ public function print_script_module_preloads() { foreach ( $this->get_dependencies( array_keys( $this->get_marked_for_enqueue() ), array( 'static' ) ) as $id => $script_module ) { // Don't preload if it's marked for enqueue. if ( true !== $script_module['enqueue'] ) { echo sprintf( '<link rel="modulepreload" href="%s" id="%s">', esc_url( $this->get_src( $id ) ), esc_attr( $id . '-js-modulepreload' ) ); } } } /** * Prints the import map using a script tag with a type="importmap" attribute. * * @since 6.5.0 */ public function print_import_map() { $import_map = $this->get_import_map(); if ( ! empty( $import_map['imports'] ) ) { wp_print_inline_script_tag( wp_json_encode( $import_map, JSON_HEX_TAG | JSON_HEX_AMP ), array( 'type' => 'importmap', 'id' => 'wp-importmap', ) ); } } /** * Returns the import map array. * * @since 6.5.0 * * @return array Array with an `imports` key mapping to an array of script module identifiers and their respective * URLs, including the version query. */ private function get_import_map(): array { $imports = array(); foreach ( $this->get_dependencies( array_keys( $this->get_marked_for_enqueue() ) ) as $id => $script_module ) { $imports[ $id ] = $this->get_src( $id ); } return array( 'imports' => $imports ); } /** * Retrieves the list of script modules marked for enqueue. * * @since 6.5.0 * * @return array[] Script modules marked for enqueue, keyed by script module identifier. */ private function get_marked_for_enqueue(): array { $enqueued = array(); foreach ( $this->registered as $id => $script_module ) { if ( true === $script_module['enqueue'] ) { $enqueued[ $id ] = $script_module; } } return $enqueued; } /** * Retrieves all the dependencies for the given script module identifiers, * filtered by import types. * * It will consolidate an array containing a set of unique dependencies based * on the requested import types: 'static', 'dynamic', or both. This method is * recursive and also retrieves dependencies of the dependencies. * * @since 6.5.0 * * @param string[] $ids The identifiers of the script modules for which to gather dependencies. * @param string[] $import_types Optional. Import types of dependencies to retrieve: 'static', 'dynamic', or both. * Default is both. * @return array[] List of dependencies, keyed by script module identifier. */ private function get_dependencies( array $ids, array $import_types = array( 'static', 'dynamic' ) ) { return array_reduce( $ids, function ( $dependency_script_modules, $id ) use ( $import_types ) { $dependencies = array(); foreach ( $this->registered[ $id ]['dependencies'] as $dependency ) { if ( in_array( $dependency['import'], $import_types, true ) && isset( $this->registered[ $dependency['id'] ] ) && ! isset( $dependency_script_modules[ $dependency['id'] ] ) ) { $dependencies[ $dependency['id'] ] = $this->registered[ $dependency['id'] ]; } } return array_merge( $dependency_script_modules, $dependencies, $this->get_dependencies( array_keys( $dependencies ), $import_types ) ); }, array() ); } /** * Gets the versioned URL for a script module src. * * If $version is set to false, the version number is the currently installed * WordPress version. If $version is set to null, no version is added. * Otherwise, the string passed in $version is used. * * @since 6.5.0 * * @param string $id The script module identifier. * @return string The script module src with a version if relevant. */ private function get_src( string $id ): string { if ( ! isset( $this->registered[ $id ] ) ) { return ''; } $script_module = $this->registered[ $id ]; $src = $script_module['src']; if ( false === $script_module['version'] ) { $src = add_query_arg( 'ver', get_bloginfo( 'version' ), $src ); } elseif ( null !== $script_module['version'] ) { $src = add_query_arg( 'ver', $script_module['version'], $src ); } /** * Filters the script module source. * * @since 6.5.0 * * @param string $src Module source URL. * @param string $id Module identifier. */ $src = apply_filters( 'script_module_loader_src', $src, $id ); return $src; } /** * Print data associated with Script Modules. * * The data will be embedded in the page HTML and can be read by Script Modules on page load. * * @since 6.7.0 * * Data can be associated with a Script Module via the * {@see "script_module_data_{$module_id}"} filter. * * The data for a Script Module will be serialized as JSON in a script tag with an ID of the * form `wp-script-module-data-{$module_id}`. */ public function print_script_module_data(): void { $modules = array(); foreach ( array_keys( $this->get_marked_for_enqueue() ) as $id ) { if ( '@wordpress/a11y' === $id ) { $this->a11y_available = true; } $modules[ $id ] = true; } foreach ( array_keys( $this->get_import_map()['imports'] ) as $id ) { if ( '@wordpress/a11y' === $id ) { $this->a11y_available = true; } $modules[ $id ] = true; } foreach ( array_keys( $modules ) as $module_id ) { /** * Filters data associated with a given Script Module. * * Script Modules may require data that is required for initialization or is essential * to have immediately available on page load. These are suitable use cases for * this data. * * The dynamic portion of the hook name, `$module_id`, refers to the Script Module ID * that the data is associated with. * * This is best suited to pass essential data that must be available to the module for * initialization or immediately on page load. It does not replace the REST API or * fetching data from the client. * * Example: * * add_filter( * 'script_module_data_MyScriptModuleID', * function ( array $data ): array { * $data['dataForClient'] = 'ok'; * return $data; * } * ); * * If the filter returns no data (an empty array), nothing will be embedded in the page. * * The data for a given Script Module, if provided, will be JSON serialized in a script * tag with an ID of the form `wp-script-module-data-{$module_id}`. * * The data can be read on the client with a pattern like this: * * Example: * * const dataContainer = document.getElementById( 'wp-script-module-data-MyScriptModuleID' ); * let data = {}; * if ( dataContainer ) { * try { * data = JSON.parse( dataContainer.textContent ); * } catch {} * } * // data.dataForClient === 'ok'; * initMyScriptModuleWithData( data ); * * @since 6.7.0 * * @param array $data The data associated with the Script Module. */ $data = apply_filters( "script_module_data_{$module_id}", array() ); if ( is_array( $data ) && array() !== $data ) { /* * This data will be printed as JSON inside a script tag like this: * <script type="application/json"></script> * * A script tag must be closed by a sequence beginning with `</`. It's impossible to * close a script tag without using `<`. We ensure that `<` is escaped and `/` can * remain unescaped, so `</script>` will be printed as `\u003C/script\u00E3`. * * - JSON_HEX_TAG: All < and > are converted to \u003C and \u003E. * - JSON_UNESCAPED_SLASHES: Don't escape /. * * If the page will use UTF-8 encoding, it's safe to print unescaped unicode: * * - JSON_UNESCAPED_UNICODE: Encode multibyte Unicode characters literally (instead of as `\uXXXX`). * - JSON_UNESCAPED_LINE_TERMINATORS: The line terminators are kept unescaped when * JSON_UNESCAPED_UNICODE is supplied. It uses the same behaviour as it was * before PHP 7.1 without this constant. Available as of PHP 7.1.0. * * The JSON specification requires encoding in UTF-8, so if the generated HTML page * is not encoded in UTF-8 then it's not safe to include those literals. They must * be escaped to avoid encoding issues. * * @see https://www.rfc-editor.org/rfc/rfc8259.html for details on encoding requirements. * @see https://www.php.net/manual/en/json.constants.php for details on these constants. * @see https://html.spec.whatwg.org/#script-data-state for details on script tag parsing. */ $json_encode_flags = JSON_HEX_TAG | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_LINE_TERMINATORS; if ( ! is_utf8_charset() ) { $json_encode_flags = JSON_HEX_TAG | JSON_UNESCAPED_SLASHES; } wp_print_inline_script_tag( wp_json_encode( $data, $json_encode_flags ), array( 'type' => 'application/json', 'id' => "wp-script-module-data-{$module_id}", ) ); } } } /** * @access private This is only intended to be called by the registered actions. * * @since 6.7.0 */ public function print_a11y_script_module_html() { if ( ! $this->a11y_available ) { return; } echo '<div style="position:absolute;margin:-1px;padding:0;height:1px;width:1px;overflow:hidden;clip-path:inset(50%);border:0;word-wrap:normal !important;">' . '<p id="a11y-speak-intro-text" class="a11y-speak-intro-text" hidden>' . esc_html__( 'Notifications' ) . '</p>' . '<div id="a11y-speak-assertive" class="a11y-speak-region" aria-live="assertive" aria-relevant="additions text" aria-atomic="true"></div>' . '<div id="a11y-speak-polite" class="a11y-speak-region" aria-live="polite" aria-relevant="additions text" aria-atomic="true"></div>' . '</div>'; } } Submit