Trying to get custom js files in my admin header

Question

I'm trying to add a java script file to my admin header and use admin-ajax.php to use ajax in my wp-admin (still learning a lot about the process). I've created a custom folder in my theme_directory/js called custom with the file I need to add to the admin header but it doesn't seem to be working. here's the code:

add_action('admin_enqueue_scripts', 'my_admin_enqueue_scripts');

function my_admin_enqueue_scripts() {
    global $current_screen;
    if ( 'page' != $current_screen->ID )
        return;
    wp_register_script('my-scripts', get_template_directory_uri() . '/js/custom/my-scripts.js' );
    wp_enqueue_script('my-scripts');
    wp_localize_script('my-scripts', 'wp_ajax', array( 'ajaxurl' => admin_url( 'admin-ajax.php' )));
}

Despite this I'm not seeing a reference in my header to my custom js file. I've even tried add_action('admin_header', 'my_admin_enqueue_scripts'); with no avail. I only need this script file in my wp-admin.

What am I missing? Thank you!

Answer 1

Ahh ok I figured it out while researching. I needed to add the $hook parameter and pass it to my function like so:

function my_admin_enqueue_scripts($hook) {
    global $current_screen;

    if ( 'post.php' != $hook )
        return;
    wp_register_script('my-scripts', get_template_directory_uri() . '/js/custom/my-scripts.js' );
    wp_enqueue_script('my-scripts');
    wp_localize_script('my-scripts', 'wp_ajax', array( 'ajaxurl' => admin_url( 'admin-ajax.php' )));
}

This gave me the results I was looking for. Thank you!

Answer 2

it's not admin_header but admin_head for add action. I finf it better to put js in admin_footer.