WordPress plugin to show the script and style handles that are currently enqueued.

script-style-handlers.php

<?php

/**
 * The plugin bootstrap file.
 *
 * This file is read by WordPress to generate the plugin information in the plugin
 * admin area. This file also includes all of the dependencies used by the plugin,
 * registers the activation and deactivation functions, and defines a function
 * that starts the plugin.
 *
 * @see              http://ashwhiting.com
 * @since             1.0.0
 *
 * @wordpress-plugin
 * Plugin Name:       Show script and style handles
 * Plugin URI:        http://ashwhiting.com
 * Description:       Simply shows all enqueued scripts and styles.
 * Version:           1.0.0
 * Author:            Ash Whiting
 * Author URI:        http://ashwhiting.com
 * License:           GPL-2.0+
 * License URI:       http://www.gnu.org/licenses/gpl-2.0.txt
 * Text Domain:       script-style-handles
 * Domain Path:       /languages
 */
if (!defined('WPINC')) {
    die;
}

define('PLUGIN_NAME_VERSION', '1.0.0');

global $enqueued_scripts;
global $enqueued_styles;

add_action('wp_print_scripts', 'cyb_list_scripts');
function cyb_list_scripts()
{
    global $wp_scripts;
    global $enqueued_scripts;
    $enqueued_scripts = array();

    echo '<h1>Scripts</h1>';
    foreach ($wp_scripts->queue as $handle) {
        echo '<p>'.$handle.'</p>';
    }
}
add_action('wp_print_styles', 'cyb_list_styles');

function cyb_list_styles()
{
    global $wp_styles;
    global $enqueued_styles;
    $enqueued_styles = array();

    echo '<h1>Styles</h1>';
    foreach ($wp_styles->queue as $handle) {
        echo '<p>'.$handle.'</p>';
    }
}