* Dependencies API: Scripts functions
* @subpackage Dependencies
* Initializes $wp_scripts if it has not been set.
* @global WP_Scripts $wp_scripts
* @return WP_Scripts WP_Scripts instance.
if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
$wp_scripts = new WP_Scripts();
* Helper function to output a _doing_it_wrong message when applicable.
* @since 5.5.0 Added the `$handle` parameter.
* @param string $function_name Function name.
* @param string $handle Optional. Name of the script or stylesheet that was
* registered or enqueued too early. Default empty.
function _wp_scripts_maybe_doing_it_wrong( $function_name, $handle = '' ) {
if ( did_action( 'init' ) || did_action( 'wp_enqueue_scripts' )
|| did_action( 'admin_enqueue_scripts' ) || did_action( 'login_enqueue_scripts' )
/* translators: 1: wp_enqueue_scripts, 2: admin_enqueue_scripts, 3: login_enqueue_scripts */
__( 'Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.' ),
'<code>wp_enqueue_scripts</code>',
'<code>admin_enqueue_scripts</code>',
'<code>login_enqueue_scripts</code>'
$message .= ' ' . sprintf(
/* translators: %s: Name of the script or stylesheet. */
__( 'This notice was triggered by the %s handle.' ),
'<code>' . $handle . '</code>'
* Prints scripts in document head that are in the $handles queue.
* Called by admin-header.php and {@see 'wp_head'} hook. Since it is called by wp_head on every page load,
* the function does not instantiate the WP_Scripts object unless script names are explicitly passed.
* Makes use of already-instantiated `$wp_scripts` global if present. Use provided {@see 'wp_print_scripts'}
* hook to register/enqueue new scripts.
* @see WP_Scripts::do_item()
* @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
* @param string|string[]|false $handles Optional. Scripts to be printed. Default 'false'.
* @return string[] On success, an array of handles of processed WP_Dependencies items; otherwise, an empty array.
function wp_print_scripts( $handles = false ) {
* Fires before scripts in the $handles queue are printed.
do_action( 'wp_print_scripts' );
if ( '' === $handles ) { // For 'wp_head'.
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
return array(); // No need to instantiate if nothing is there.
return wp_scripts()->do_items( $handles );
* Adds extra code to a registered script.
* Code will only be added if the script is already in the queue.
* Accepts a string `$data` containing the code. If two or more code blocks
* are added to the same script `$handle`, they will be printed in the order
* they were added, i.e. the latter added code can redeclare the previous.
* @see WP_Scripts::add_inline_script()
* @param string $handle Name of the script to add the inline script to.
* @param string $data String containing the JavaScript to be added.
* @param string $position Optional. Whether to add the inline script before the handle
* or after. Default 'after'.
* @return bool True on success, false on failure.
function wp_add_inline_script( $handle, $data, $position = 'after' ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );
if ( false !== stripos( $data, '</script>' ) ) {
/* translators: 1: <script>, 2: wp_add_inline_script() */
__( 'Do not pass %1$s tags to %2$s.' ),
'<code><script></code>',
'<code>wp_add_inline_script()</code>'
$data = trim( preg_replace( '#<script[^>]*>(.*)</script>#is', '$1', $data ) );
return wp_scripts()->add_inline_script( $handle, $data, $position );
* Registers a new script.
* Registers a script to be enqueued later using the wp_enqueue_script() function.
* @see WP_Dependencies::add()
* @see WP_Dependencies::add_data()
* @since 4.3.0 A return value was added.
* @since 6.3.0 The $in_footer parameter of type boolean was overloaded to be an $args parameter of type array.
* @param string $handle Name of the script. Should be unique.
* @param string|false $src Full URL of the script, or path of the script relative to the WordPress root directory.
* If source is set to false, script is an alias of other scripts it depends on.
* @param string[] $deps Optional. An array of registered script handles this script depends on. Default empty array.
* @param string|bool|null $ver Optional. String specifying script version number, if it has one, which is added to the URL
* as a query string for cache busting purposes. If version is set to false, a version
* number is automatically added equal to current installed WordPress version.
* If set to null, no version is added.
* @param array|bool $args {
* Optional. An array of additional script loading strategies. Default empty array.
* Otherwise, it may be a boolean in which case it determines whether the script is printed in the footer. Default false.
* @type string $strategy Optional. If provided, may be either 'defer' or 'async'.
* @type bool $in_footer Optional. Whether to print the script in the footer. Default 'false'.
* @return bool Whether the script has been registered. True on success, false on failure.
function wp_register_script( $handle, $src, $deps = array(), $ver = false, $args = array() ) {
if ( ! is_array( $args ) ) {
'in_footer' => (bool) $args,
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );
$wp_scripts = wp_scripts();
$registered = $wp_scripts->add( $handle, $src, $deps, $ver );
if ( ! empty( $args['in_footer'] ) ) {
$wp_scripts->add_data( $handle, 'group', 1 );
if ( ! empty( $args['strategy'] ) ) {
$wp_scripts->add_data( $handle, 'strategy', $args['strategy'] );
* Works only if the script has already been registered.
* Accepts an associative array `$l10n` and creates a JavaScript object:
* @see WP_Scripts::localize()
* @link https://core.trac.wordpress.org/ticket/11520
* @todo Documentation cleanup
* @param string $handle Script handle the data will be attached to.
* @param string $object_name Name for the JavaScript object. Passed directly, so it should be qualified JS variable.
* Example: '/[a-zA-Z0-9_]+/'.
* @param array $l10n The data itself. The data can be either a single or multi-dimensional array.
* @return bool True if the script was successfully localized, false otherwise.
function wp_localize_script( $handle, $object_name, $l10n ) {
$wp_scripts = wp_scripts();
return $wp_scripts->localize( $handle, $object_name, $l10n );
* Sets translated strings for a script.
* Works only if the script has already been registered.
* @see WP_Scripts::set_translations()
* @since 5.1.0 The `$domain` parameter was made optional.
* @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
* @param string $handle Script handle the textdomain will be attached to.
* @param string $domain Optional. Text domain. Default 'default'.
* @param string $path Optional. The full file path to the directory containing translation files.
* @return bool True if the text domain was successfully localized, false otherwise.
function wp_set_script_translations( $handle, $domain = 'default', $path = '' ) {
if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );
return $wp_scripts->set_translations( $handle, $domain, $path );
* Removes a registered script.
* Note: there are intentional safeguards in place to prevent critical admin scripts,
* such as jQuery core, from being unregistered.
* @see WP_Dependencies::remove()
* @global string $pagenow The filename of the current screen.
* @param string $handle Name of the script to be removed.
function wp_deregister_script( $handle ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );
* Do not allow accidental or negligent de-registering of critical scripts in the admin.
* Show minimal remorse if the correct hook is used.
$current_filter = current_filter();
if ( ( is_admin() && 'admin_enqueue_scripts' !== $current_filter ) ||
( 'wp-login.php' === $pagenow && 'login_enqueue_scripts' !== $current_filter )
'jquery-ui-autocomplete',
if ( in_array( $handle, $not_allowed, true ) ) {
/* translators: 1: Script name, 2: wp_enqueue_scripts */
__( 'Do not deregister the %1$s script in the administration area. To target the front-end theme, use the %2$s hook.' ),
'<code>wp_enqueue_scripts</code>'
wp_scripts()->remove( $handle );
* Registers the script if `$src` provided (does NOT overwrite), and enqueues it.
* @see WP_Dependencies::add()
* @see WP_Dependencies::add_data()
* @see WP_Dependencies::enqueue()
* @since 6.3.0 The $in_footer parameter of type boolean was overloaded to be an $args parameter of type array.
* @param string $handle Name of the script. Should be unique.
* @param string $src Full URL of the script, or path of the script relative to the WordPress root directory.
* @param string[] $deps Optional. An array of registered script handles this script depends on. Default empty array.
* @param string|bool|null $ver Optional. String specifying script version number, if it has one, which is added to the URL
* as a query string for cache busting purposes. If version is set to false, a version
* number is automatically added equal to current installed WordPress version.
* If set to null, no version is added.
* @param array|bool $args {
* Optional. An array of additional script loading strategies. Default empty array.
* Otherwise, it may be a boolean in which case it determines whether the script is printed in the footer. Default false.
* @type string $strategy Optional. If provided, may be either 'defer' or 'async'.
* @type bool $in_footer Optional. Whether to print the script in the footer. Default 'false'.
function wp_enqueue_script( $handle, $src = '', $deps = array(), $ver = false, $args = array() ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );
$wp_scripts = wp_scripts();
if ( $src || ! empty( $args ) ) {
$_handle = explode( '?', $handle );
if ( ! is_array( $args ) ) {
'in_footer' => (bool) $args,
$wp_scripts->add( $_handle[0], $src, $deps, $ver );
if ( ! empty( $args['in_footer'] ) ) {
$wp_scripts->add_data( $_handle[0], 'group', 1 );
if ( ! empty( $args['strategy'] ) ) {
$wp_scripts->add_data( $_handle[0], 'strategy', $args['strategy'] );
$wp_scripts->enqueue( $handle );
* Removes a previously enqueued script.
* @see WP_Dependencies::dequeue()
* @param string $handle Name of the script to be removed.
function wp_dequeue_script( $handle ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );
wp_scripts()->dequeue( $handle );
* Determines whether a script has been added to the queue.
* For more information on this and similar theme functions, check out
* the {@link https://developer.wordpress.org/themes/basics/conditional-tags/
* Conditional Tags} article in the Theme Developer Handbook.
* @since 3.5.0 'enqueued' added as an alias of the 'queue' list.
* @param string $handle Name of the script.
* @param string $status Optional. Status of the script to check. Default 'enqueued'.
* Accepts 'enqueued', 'registered', 'queue', 'to_do', and 'done'.
* @return bool Whether the script is queued.
function wp_script_is( $handle, $status = 'enqueued' ) {
_wp_scripts_maybe_doing_it_wrong( __FUNCTION__, $handle );
return (bool) wp_scripts()->query( $handle, $status );
* Adds metadata to a script.
* Works only if the script has already been registered.
* Possible values for $key and $value:
* 'conditional' string Comments for IE 6, lte IE 7, etc.
* @see WP_Dependencies::add_data()
* @param string $handle Name of the script.
* @param string $key Name of data point for which we're storing a value.
* @param mixed $value String containing the data to be added.
* @return bool True on success, false on failure.
function wp_script_add_data( $handle, $key, $value ) {
return wp_scripts()->add_data( $handle, $key, $value );
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