Hello Bar (Offical) plugin for WordPress done properly

hellobar-wp-plugin.php

<?php

/*
Plugin Name: Hello Bar (Official - modified by 9seeds to only show when admin bar isn't and to WP code standards)
Plugin URI: http://www.hellobar.com
Description: Inserts your custom Hello Bar on mauitime.com. Because of the WordPress User Bar, you might need to log out and visit your WordPress site again to see your Hello Bar. Please note that this plugin is only valid for mauitime.com. If you want to edit your Hello Bar click "Visit plugin site" below.
Version: 1.0
Author: Hello Bar
Author URI: http://www.hellobar.com
License: GPL v2

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License, version 2, as
	published by the Free Software Foundation.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

/* The "offical" Hello Bar script is poorly written and clobbers the WP admin bar, so bye bye */
/* Offical garbage
function add_hellobar_script() {
	echo "<script src=\"//my.hellobar.com/__some_really_long_hash__.js\" type=\"text/javascript\" async=\"async\"></script>";
}
add_action( 'wp_footer', 'add_hellobar_script' );
*/

/**
 * The proper way...
 */
function s9_hellobar_script() {
	if ( ! is_admin_bar_showing() ) {
		wp_enqueue_script( 's9-hello-bar', 'https://my.hellobar.com/__some_really_long_hash__.js', '', '1.0', true );
	}
}
add_action( 'wp_enqueue_scripts', 's9_hellobar_script' );