<?php

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/**

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* Dependencies API: WP_Scripts class

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*

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* @since 2.6.0

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*

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* @package WordPress

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* @subpackage Dependencies

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*/

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/**

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* Core class used to register scripts.

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*

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* @since 2.1.0

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*

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* @see WP_Dependencies

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*/

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class WP_Scripts extends WP_Dependencies {

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/**

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* Base URL for scripts.

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*

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* Full URL with trailing slash.

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*

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* @since 2.6.0

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* @var string

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*/

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public $base_url;

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/**

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* URL of the content directory.

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*

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* @since 2.8.0

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* @var string

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*/

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public $content_url;

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/**

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* Default version string for scripts.

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*

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* @since 2.6.0

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* @var string

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*/

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public $default_version;

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/**

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* Holds handles of scripts which are enqueued in footer.

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*

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* @since 2.8.0

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* @var array

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*/

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public $in_footer = array();

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/**

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* Holds a list of script handles which will be concatenated.

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*

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* @since 2.8.0

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* @var string

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*/

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public $concat = '';

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/**

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* Holds a string which contains script handles and their version.

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*

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* @since 2.8.0

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* @deprecated 3.4.0

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* @var string

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*/

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public $concat_version = '';

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/**

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* Whether to perform concatenation.

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*

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* @since 2.8.0

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* @var bool

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*/

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public $do_concat = false;

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/**

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* Holds HTML markup of scripts and additional data if concatenation

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* is enabled.

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*

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* @since 2.8.0

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* @var string

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*/

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public $print_html = '';

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/**

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* Holds inline code if concatenation is enabled.

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*

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* @since 2.8.0

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* @var string

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*/

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public $print_code = '';

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/**

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* Holds a list of script handles which are not in the default directory

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* if concatenation is enabled.

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*

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* Unused in core.

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*

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* @since 2.8.0

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* @var string

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*/

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public $ext_handles = '';

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/**

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* Holds a string which contains handles and versions of scripts which

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* are not in the default directory if concatenation is enabled.

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*

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* Unused in core.

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*

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* @since 2.8.0

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* @var string

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*/

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public $ext_version = '';

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/**

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* List of default directories.

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*

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* @since 2.8.0

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* @var array

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*/

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public $default_dirs;

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/**

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* Holds a mapping of dependents (as handles) for a given script handle.

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* Used to optimize recursive dependency tree checks.

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*

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* @since 6.3.0

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* @var array<string, string[]>

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*/

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private $dependents_map = array();

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/**

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* Holds a reference to the delayed (non-blocking) script loading strategies.

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* Used by methods that validate loading strategies.

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*

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* @since 6.3.0

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* @var string[]

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*/

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private $delayed_strategies = array( 'defer', 'async' );

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/**

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* Constructor.

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*

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* @since 2.6.0

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*/

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public function __construct() {

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$this->init();

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add_action( 'init', array( $this, 'init' ), 0 );

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}

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/**

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* Initialize the class.

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*

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* @since 3.4.0

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*/

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public function init() {

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/**

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* Fires when the WP_Scripts instance is initialized.

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*

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* @since 2.6.0

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*

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* @param WP_Scripts $wp_scripts WP_Scripts instance (passed by reference).

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*/

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do_action_ref_array( 'wp_default_scripts', array( &$this ) );

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}

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/**

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* Prints scripts.

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*

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* Prints the scripts passed to it or the print queue. Also prints all necessary dependencies.

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*

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* @since 2.1.0

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* @since 2.8.0 Added the `$group` parameter.

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*

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* @param string|string[]|false $handles Optional. Scripts to be printed: queue (false),

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* single script (string), or multiple scripts (array of strings).

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* Default false.

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* @param int|false $group Optional. Group level: level (int), no groups (false).

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* Default false.

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* @return string[] Handles of scripts that have been printed.

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*/

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public function print_scripts( $handles = false, $group = false ) {

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return $this->do_items( $handles, $group );

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}

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/**

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* Prints extra scripts of a registered script.

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*

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* @since 2.1.0

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* @since 2.8.0 Added the `$display` parameter.

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* @deprecated 3.3.0

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*

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* @see print_extra_script()

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*

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* @param string $handle The script's registered handle.

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* @param bool $display Optional. Whether to print the extra script

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* instead of just returning it. Default true.

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* @return bool|string|void Void if no data exists, extra scripts if `$display` is true,

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* true otherwise.

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*/

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public function print_scripts_l10n( $handle, $display = true ) {

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_deprecated_function( __FUNCTION__, '3.3.0', 'WP_Scripts::print_extra_script()' );

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return $this->print_extra_script( $handle, $display );

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}

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/**

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* Prints extra scripts of a registered script.

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*

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* @since 3.3.0

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*

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* @param string $handle The script's registered handle.

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* @param bool $display Optional. Whether to print the extra script

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* instead of just returning it. Default true.

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* @return bool|string|void Void if no data exists, extra scripts if `$display` is true,

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* true otherwise.

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*/

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public function print_extra_script( $handle, $display = true ) {

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$output = $this->get_data( $handle, 'data' );

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if ( ! $output ) {

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return;

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}

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/*

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* Do not print a sourceURL comment if concatenation is enabled.

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*

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* Extra scripts may be concatenated into a single script.

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* The line-based sourceURL comments may break concatenated scripts

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* and do not make sense when multiple scripts are joined together.

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*/

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if ( ! $this->do_concat ) {

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$output .= sprintf(

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"\n//# sourceURL=%s",

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rawurlencode( "{$handle}-js-extra" )

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);

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}

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if ( ! $display ) {

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return $output;

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}

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wp_print_inline_script_tag( $output, array( 'id' => "{$handle}-js-extra" ) );

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return true;

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}

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/**

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* Checks whether all dependents of a given handle are in the footer.

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*

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* If there are no dependents, this is considered the same as if all dependents were in the footer.

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*

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* @since 6.4.0

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*

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* @param string $handle Script handle.

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* @return bool Whether all dependents are in the footer.

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*/

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private function are_all_dependents_in_footer( $handle ) {

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foreach ( $this->get_dependents( $handle ) as $dep ) {

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if ( isset( $this->groups[ $dep ] ) && 0 === $this->groups[ $dep ] ) {

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return false;

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}

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}

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return true;

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}

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/**

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* Processes a script dependency.

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*

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* @since 2.6.0

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* @since 2.8.0 Added the `$group` parameter.

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*

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* @see WP_Dependencies::do_item()

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*

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* @param string $handle The script's registered handle.

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* @param int|false $group Optional. Group level: level (int), no groups (false).

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* Default false.

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* @return bool True on success, false on failure.

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*/

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public function do_item( $handle, $group = false ) {

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if ( ! parent::do_item( $handle ) ) {

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return false;

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}

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if ( 0 === $group && $this->groups[ $handle ] > 0 ) {

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$this->in_footer[] = $handle;

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return false;

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}

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if ( false === $group && in_array( $handle, $this->in_footer, true ) ) {

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$this->in_footer = array_diff( $this->in_footer, (array) $handle );

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}

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$obj = $this->registered[ $handle ];

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if ( $obj->extra['conditional'] ?? false ) {

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return false;

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}

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if ( null === $obj->ver ) {

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$ver = '';

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} else {

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$ver = $obj->ver ? $obj->ver : $this->default_version;

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}

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if ( isset( $this->args[ $handle ] ) ) {

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$ver = $ver ? $ver . '&amp;' . $this->args[ $handle ] : $this->args[ $handle ];

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}

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$src = $obj->src;

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$strategy = $this->get_eligible_loading_strategy( $handle );

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$intended_strategy = (string) $this->get_data( $handle, 'strategy' );

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if ( ! $this->is_delayed_strategy( $intended_strategy ) ) {

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$intended_strategy = '';

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}

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/*

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* Move this script to the footer if:

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* 1. The script is in the header group.

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* 2. The current output is the header.

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* 3. The intended strategy is delayed.

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* 4. The actual strategy is not delayed.

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* 5. All dependent scripts are in the footer.

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*/

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if (

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0 === $group &&

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0 === $this->groups[ $handle ] &&

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$intended_strategy &&

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! $this->is_delayed_strategy( $strategy ) &&

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$this->are_all_dependents_in_footer( $handle )

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) {

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$this->in_footer[] = $handle;

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return false;

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}

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$before_script = $this->get_inline_script_tag( $handle, 'before' );

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$after_script = $this->get_inline_script_tag( $handle, 'after' );

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if ( $before_script || $after_script ) {

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$inline_script_tag = $before_script . $after_script;

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} else {

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$inline_script_tag = '';

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}

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/*

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* Prevent concatenation of scripts if the text domain is defined

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* to ensure the dependency order is respected.

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*/

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$translations_stop_concat = ! empty( $obj->textdomain );

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$translations = $this->print_translations( $handle, false );

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if ( $translations ) {

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/*

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* The sourceURL comment is not included by WP_Scripts::print_translations()

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* when `$display` is `false` to prevent issues where the script tag contents are used

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* by extenders for other purposes, for example concatenated with other script content.

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*

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* Include the sourceURL comment here as it would be when printed directly.

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*/

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$source_url = rawurlencode( "{$handle}-js-translations" );

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$translations .= "\n//# sourceURL={$source_url}";

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$translations = wp_get_inline_script_tag( $translations, array( 'id' => "{$handle}-js-translations" ) );

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}

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if ( $this->do_concat ) {

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/**

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* Filters the script loader source.

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*

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* @since 2.2.0

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*

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* @param string $src Script loader source path.

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* @param string $handle Script handle.

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*/

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$filtered_src = apply_filters( 'script_loader_src', $src, $handle );

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if (

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$this->in_default_dir( $filtered_src )

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&& ( $before_script || $after_script || $translations_stop_concat || $this->is_delayed_strategy( $strategy ) )

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) {

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$this->do_concat = false;

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// Have to print the so-far concatenated scripts right away to maintain the right order.

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_print_scripts();

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$this->reset();

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} elseif ( $this->in_default_dir( $filtered_src ) ) {

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$this->print_code .= $this->print_extra_script( $handle, false );

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$this->concat .= "$handle,";

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$this->concat_version .= "$handle$ver";

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return true;

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} else {

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$this->ext_handles .= "$handle,";

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$this->ext_version .= "$handle$ver";

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}

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}

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$this->print_extra_script( $handle );

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// A single item may alias a set of items, by having dependencies, but no source.

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if ( ! $src ) {

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if ( $inline_script_tag ) {

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if ( $this->do_concat ) {

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$this->print_html .= $inline_script_tag;

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} else {

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echo $inline_script_tag;

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}

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}

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return true;

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}

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if ( ! preg_match( '|^(https?:)?//|', $src ) && ! ( $this->content_url && str_starts_with( $src, $this->content_url ) ) ) {

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$src = $this->base_url . $src;

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}

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if ( ! empty( $ver ) ) {

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$src = add_query_arg( 'ver', $ver, $src );

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}

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/** This filter is documented in wp-includes/class-wp-scripts.php */

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$src = esc_url_raw( apply_filters( 'script_loader_src', $src, $handle ) );

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if ( ! $src ) {

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return true;

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}

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$attr = array(

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'src' => $src,

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'id' => "{$handle}-js",

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);

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if ( $strategy ) {

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$attr[ $strategy ] = true;

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}

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if ( $intended_strategy ) {

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$attr['data-wp-strategy'] = $intended_strategy;

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}

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// Determine fetchpriority.

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$original_fetchpriority = isset( $obj->extra['fetchpriority'] ) ? $obj->extra['fetchpriority'] : null;

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if ( null === $original_fetchpriority || ! $this->is_valid_fetchpriority( $original_fetchpriority ) ) {

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$original_fetchpriority = 'auto';

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}

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$actual_fetchpriority = $this->get_highest_fetchpriority_with_dependents( $handle );

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if ( null === $actual_fetchpriority ) {

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// If null, it's likely this script was not explicitly enqueued, so in this case use the original priority.

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$actual_fetchpriority = $original_fetchpriority;

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}

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if ( is_string( $actual_fetchpriority ) && 'auto' !== $actual_fetchpriority ) {

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$attr['fetchpriority'] = $actual_fetchpriority;

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}

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if ( $original_fetchpriority !== $actual_fetchpriority ) {

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$attr['data-wp-fetchpriority'] = $original_fetchpriority;

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}

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$tag = $translations . $before_script;

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$tag .= wp_get_script_tag( $attr );

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$tag .= $after_script;

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/**

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* Filters the HTML script tag of an enqueued script.

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*

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* @since 4.1.0

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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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* @param string $src The script's source URL.

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*/

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$tag = apply_filters( 'script_loader_tag', $tag, $handle, $src );

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if ( $this->do_concat ) {

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$this->print_html .= $tag;

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} else {

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echo $tag;

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}

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return true;

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}

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/**

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* Adds extra code to a registered script.

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*

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* @since 4.5.0

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*

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* @param string $handle Name of the script to add the inline script to.

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* Must be lowercase.

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* @param string $data String containing the JavaScript to be added.

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* @param string $position Optional. Whether to add the inline script

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* before the handle or after. Default 'after'.

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* @return bool True on success, false on failure.

[488] Fix | Delete

*/

[489] Fix | Delete

public function add_inline_script( $handle, $data, $position = 'after' ) {

[490] Fix | Delete

if ( ! $data ) {

[491] Fix | Delete

return false;

[492] Fix | Delete

}

[493] Fix | Delete

[494] Fix | Delete

if ( 'after' !== $position ) {

[495] Fix | Delete

$position = 'before';

[496] Fix | Delete

}

[497] Fix | Delete

[498] Fix | Delete

$script = (array) $this->get_data( $handle, $position );

[499] Fix | Delete