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  • I've been reading up a bit on this subject, but the more I read - the more confused I get.

  • Can someone explain to me in short what's the exact difference between wp_enqueue_scripts, wp_register_scripts and wp_print_scripts?

  • For example, I have the following code in my functions.php - and it's working, but I do not understand why I can not use wp_print_scripts for the stylesheets, whereas the code still works if I use wp_enqueue_scripts for the javascript files:

    add_action('wp_print_scripts', 'add_my_js');
function add_my_js(){
    if(!is_admin()){
        wp_enqueue_script('default',  get_bloginfo('stylesheet_directory').'/js/default.js', array('jquery'));
    }
}

add_action('wp_enqueue_scripts', 'add_my_stylesheet');
function add_my_stylesheet() {
    wp_register_style('default', get_bloginfo( 'stylesheet_url'));
    wp_enqueue_style( 'default');
}
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wp_print_scripts is the action that runs when scripts are output to the template. wp_register_script and wp_enqueue_script are functions for registering/enqueueing scripts to be output when wp_print_scripts runs.

you can't register or enqueue styles in the wp_print_scripts action hook because styles have already been output in the wp_print_styles hook, which runs before wp_print_scripts.

refer to the action reference to see the order things are executed in in a request:

22. wp_head
23. wp_enqueue_scripts
24. wp_print_styles
25. wp_print_scripts
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  • So then, what is the difference between wp_enqueue_script and wp_register_script? Commented Feb 29, 2012 at 20:07
  • 3
    wp_register_script registers the script with WordPress, but does not add it to the queue. If you don't also call wp_enqueue_script, the script will not appear. The purpose of this is to let you register your script once, then later conditionally enqueue it somewhere else in your code. This is useful for plugin developers where a script may be enqueued in multiple places within the code. You can also just enqueue your script directly without registering it. Commented Aug 22, 2012 at 17:33

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