3 * Dependencies API: Scripts functions
8 * @subpackage Dependencies
12 * Initialize $wp_scripts if it has not been set.
14 * @global WP_Scripts $wp_scripts
18 * @return WP_Scripts WP_Scripts instance.
20 function wp_scripts() {
22 if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
23 $wp_scripts = new WP_Scripts();
29 * Helper function to output a _doing_it_wrong message when applicable.
34 * @param string $function Function name.
36 function _wp_scripts_maybe_doing_it_wrong( $function ) {
37 if ( did_action( 'init' ) || did_action( 'admin_enqueue_scripts' ) || did_action( 'wp_enqueue_scripts' ) || did_action( 'login_enqueue_scripts' ) ) {
41 _doing_it_wrong( $function, sprintf(
42 /* translators: 1: wp_enqueue_scripts, 2: admin_enqueue_scripts, 3: login_enqueue_scripts */
43 __( 'Scripts and styles should not be registered or enqueued until the %1$s, %2$s, or %3$s hooks.' ),
44 '<code>wp_enqueue_scripts</code>',
45 '<code>admin_enqueue_scripts</code>',
46 '<code>login_enqueue_scripts</code>'
51 * Prints scripts in document head that are in the $handles queue.
53 * Called by admin-header.php and {@see 'wp_head'} hook. Since it is called by wp_head on every page load,
54 * the function does not instantiate the WP_Scripts object unless script names are explicitly passed.
55 * Makes use of already-instantiated $wp_scripts global if present. Use provided {@see 'wp_print_scripts'}
56 * hook to register/enqueue new scripts.
58 * @see WP_Scripts::do_items()
59 * @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
63 * @param string|bool|array $handles Optional. Scripts to be printed. Default 'false'.
64 * @return array On success, a processed array of WP_Dependencies items; otherwise, an empty array.
66 function wp_print_scripts( $handles = false ) {
68 * Fires before scripts in the $handles queue are printed.
72 do_action( 'wp_print_scripts' );
73 if ( '' === $handles ) { // for wp_head
77 _wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
80 if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
82 return array(); // No need to instantiate if nothing is there.
86 return wp_scripts()->do_items( $handles );
90 * Adds extra code to a registered script.
92 * Code will only be added if the script in already in the queue.
93 * Accepts a string $data containing the Code. If two or more code blocks
94 * are added to the same script $handle, they will be printed in the order
95 * they were added, i.e. the latter added code can redeclare the previous.
99 * @see WP_Scripts::add_inline_script()
101 * @param string $handle Name of the script to add the inline script to.
102 * @param string $data String containing the javascript to be added.
103 * @param string $position Optional. Whether to add the inline script before the handle
104 * or after. Default 'after'.
105 * @return bool True on success, false on failure.
107 function wp_add_inline_script( $handle, $data, $position = 'after' ) {
108 _wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
110 if ( false !== stripos( $data, '</script>' ) ) {
111 _doing_it_wrong( __FUNCTION__, sprintf(
112 /* translators: 1: <script>, 2: wp_add_inline_script() */
113 __( 'Do not pass %1$s tags to %2$s.' ),
114 '<code><script></code>',
115 '<code>wp_add_inline_script()</code>'
117 $data = trim( preg_replace( '#<script[^>]*>(.*)</script>#is', '$1', $data ) );
120 return wp_scripts()->add_inline_script( $handle, $data, $position );
124 * Register a new script.
126 * Registers a script to be enqueued later using the wp_enqueue_script() function.
128 * @see WP_Dependencies::add()
129 * @see WP_Dependencies::add_data()
132 * @since 4.3.0 A return value was added.
134 * @param string $handle Name of the script. Should be unique.
135 * @param string $src Full URL of the script, or path of the script relative to the WordPress root directory.
136 * @param array $deps Optional. An array of registered script handles this script depends on. Default empty array.
137 * @param string|bool|null $ver Optional. String specifying script version number, if it has one, which is added to the URL
138 * as a query string for cache busting purposes. If version is set to false, a version
139 * number is automatically added equal to current installed WordPress version.
140 * If set to null, no version is added.
141 * @param bool $in_footer Optional. Whether to enqueue the script before </body> instead of in the <head>.
143 * @return bool Whether the script has been registered. True on success, false on failure.
145 function wp_register_script( $handle, $src, $deps = array(), $ver = false, $in_footer = false ) {
146 $wp_scripts = wp_scripts();
147 _wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
149 $registered = $wp_scripts->add( $handle, $src, $deps, $ver );
151 $wp_scripts->add_data( $handle, 'group', 1 );
160 * Works only if the script has already been added.
162 * Accepts an associative array $l10n and creates a JavaScript object:
171 * @see WP_Dependencies::localize()
172 * @link https://core.trac.wordpress.org/ticket/11520
173 * @global WP_Scripts $wp_scripts The WP_Scripts object for printing scripts.
177 * @todo Documentation cleanup
179 * @param string $handle Script handle the data will be attached to.
180 * @param string $object_name Name for the JavaScript object. Passed directly, so it should be qualified JS variable.
181 * Example: '/[a-zA-Z0-9_]+/'.
182 * @param array $l10n The data itself. The data can be either a single or multi-dimensional array.
183 * @return bool True if the script was successfully localized, false otherwise.
185 function wp_localize_script( $handle, $object_name, $l10n ) {
187 if ( ! ( $wp_scripts instanceof WP_Scripts ) ) {
188 _wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
192 return $wp_scripts->localize( $handle, $object_name, $l10n );
196 * Remove a registered script.
198 * Note: there are intentional safeguards in place to prevent critical admin scripts,
199 * such as jQuery core, from being unregistered.
201 * @see WP_Dependencies::remove()
205 * @param string $handle Name of the script to be removed.
207 function wp_deregister_script( $handle ) {
208 _wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
211 * Do not allow accidental or negligent de-registering of critical scripts in the admin.
212 * Show minimal remorse if the correct hook is used.
214 $current_filter = current_filter();
215 if ( ( is_admin() && 'admin_enqueue_scripts' !== $current_filter ) ||
216 ( 'wp-login.php' === $GLOBALS['pagenow'] && 'login_enqueue_scripts' !== $current_filter )
219 'jquery', 'jquery-core', 'jquery-migrate', 'jquery-ui-core', 'jquery-ui-accordion',
220 'jquery-ui-autocomplete', 'jquery-ui-button', 'jquery-ui-datepicker', 'jquery-ui-dialog',
221 'jquery-ui-draggable', 'jquery-ui-droppable', 'jquery-ui-menu', 'jquery-ui-mouse',
222 'jquery-ui-position', 'jquery-ui-progressbar', 'jquery-ui-resizable', 'jquery-ui-selectable',
223 'jquery-ui-slider', 'jquery-ui-sortable', 'jquery-ui-spinner', 'jquery-ui-tabs',
224 'jquery-ui-tooltip', 'jquery-ui-widget', 'underscore', 'backbone',
227 if ( in_array( $handle, $no ) ) {
229 /* translators: 1: script name, 2: wp_enqueue_scripts */
230 __( 'Do not deregister the %1$s script in the administration area. To target the front-end theme, use the %2$s hook.' ),
231 "<code>$handle</code>",
232 '<code>wp_enqueue_scripts</code>'
234 _doing_it_wrong( __FUNCTION__, $message, '3.6.0' );
239 wp_scripts()->remove( $handle );
245 * Registers the script if $src provided (does NOT overwrite), and enqueues it.
247 * @see WP_Dependencies::add()
248 * @see WP_Dependencies::add_data()
249 * @see WP_Dependencies::enqueue()
253 * @param string $handle Name of the script. Should be unique.
254 * @param string $src Full URL of the script, or path of the script relative to the WordPress root directory.
256 * @param array $deps Optional. An array of registered script handles this script depends on. Default empty array.
257 * @param string|bool|null $ver Optional. String specifying script version number, if it has one, which is added to the URL
258 * as a query string for cache busting purposes. If version is set to false, a version
259 * number is automatically added equal to current installed WordPress version.
260 * If set to null, no version is added.
261 * @param bool $in_footer Optional. Whether to enqueue the script before </body> instead of in the <head>.
264 function wp_enqueue_script( $handle, $src = '', $deps = array(), $ver = false, $in_footer = false ) {
265 $wp_scripts = wp_scripts();
267 _wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
270 if ( $src || $in_footer ) {
271 $_handle = explode( '?', $handle );
274 $wp_scripts->add( $_handle[0], $src, $deps, $ver );
278 $wp_scripts->add_data( $_handle[0], 'group', 1 );
282 $wp_scripts->enqueue( $handle );
286 * Remove a previously enqueued script.
288 * @see WP_Dependencies::dequeue()
292 * @param string $handle Name of the script to be removed.
294 function wp_dequeue_script( $handle ) {
295 _wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
297 wp_scripts()->dequeue( $handle );
301 * Check whether a script has been added to the queue.
304 * @since 3.5.0 'enqueued' added as an alias of the 'queue' list.
306 * @param string $handle Name of the script.
307 * @param string $list Optional. Status of the script to check. Default 'enqueued'.
308 * Accepts 'enqueued', 'registered', 'queue', 'to_do', and 'done'.
309 * @return bool Whether the script is queued.
311 function wp_script_is( $handle, $list = 'enqueued' ) {
312 _wp_scripts_maybe_doing_it_wrong( __FUNCTION__ );
314 return (bool) wp_scripts()->query( $handle, $list );
318 * Add metadata to a script.
320 * Works only if the script has already been added.
322 * Possible values for $key and $value:
323 * 'conditional' string Comments for IE 6, lte IE 7, etc.
327 * @see WP_Dependency::add_data()
329 * @param string $handle Name of the script.
330 * @param string $key Name of data point for which we're storing a value.
331 * @param mixed $value String containing the data to be added.
332 * @return bool True on success, false on failure.
334 function wp_script_add_data( $handle, $key, $value ){
335 return wp_scripts()->add_data( $handle, $key, $value );