apply_filters( 'script_loader_tag', string $tag, string $handle, string $src )

Filters the HTML script tag of an enqueued script.

Contents

Parameters

$tag string
The <script> tag for the enqueued script.
$handle string
The script's registered handle.
$src string
The script's source URL.

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Source

File: wp-includes/class-wp-scripts.php. View all references 

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

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Changelog

Changelog
Version Description
4.1.0 Introduced.

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User Contributed Notes

  1. Skip to note 1 content
    You must log in to vote on the helpfulness of this noteVote results for this note: 6You must log in to vote on the helpfulness of this note
    Contributed by opportus —

    Useful when a script excecution depends on “ attributes, eg:

    add_filter( 'script_loader_tag', 'add_id_to_script', 10, 3 );

function add_id_to_script( $tag, $handle, $src ) {
    if ( 'dropbox.js' === $handle ) {
        $tag = '<script type="text/javascript" src="' . esc_url( $src ) . '" id="dropboxjs" data-app-key="MY_APP_KEY"></script>';
    }

    return $tag;
}
  2. Skip to note 2 content
    You must log in to vote on the helpfulness of this noteVote results for this note: 0You must log in to vote on the helpfulness of this note
    Contributed by Geoffrey Brossard —

    It can be used to defer or async all JS scripts :

    function prefix_defer_js( $html ) {
    if ( ! is_admin() ) {
        $html = str_replace( '></script>', ' defer></script>', $html );
    }
    return $html;
}
add_filter( 'script_loader_tag', 'prefix_defer_js' );

    You can also use the $handle argument to filter scripts.

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