wp_enqueue_script() – Enqueue a script.

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Enqueue a script.

Registers the script if $src provided (does NOT overwrite), and enqueues it.


wp_enqueue_script( $handle, $src, $deps, $ver, $in_footer );


( string ) required – Name of the script. Should be unique.
( string ) optional – Full URL of the script, or path of the script relative to the WordPress root directory. Default empty.
( string[] ) optional – Optional. An array of registered script handles this script depends on. Default empty array.
( string|bool|null ) optional – 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.
( bool ) optional – Optional. Whether to enqueue the script before </body> instead of in the `<head>`. Default 'false'.




File name: wordpress/wp-includes/functions.wp-scripts.php

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function wp_enqueue_script( $handle, $src = '', $deps = array(), $ver = false, $in_footer = false ) {
  _wp_scripts_maybe_doing_it_wrong( wp_enqueue_script, $handle );

  $wp_scripts = wp_scripts();

  if ( $src || $in_footer ) {
    $_handle = explode( '?', $handle );

    if ( $src ) {
      $wp_scripts->add( $_handle[0], $src, $deps, $ver );

    if ( $in_footer ) {
      $wp_scripts->add_data( $_handle[0], 'group', 1 );

  $wp_scripts->enqueue( $handle );

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