wp_enqueue_scripts不起作用

Question

I created my own javascript file and now I want to integrate into my module. I'm trying to do as told in this site https://developer.wordpress.org/reference/functions/wp_enqueue_script/ But it does not work, I don't understand why

P.S: I am in the main file of my module (exampe.php)

class exemple
{
    public function __construct()
    {
        register_activation_hook(__FILE__, array('exemple_bd', 'install'));

        register_uninstall_hook(__FILE__, array('exemple_bd', 'uninstall'));

        include_once plugin_dir_path( __FILE__ ).'settings.php';
        new Settings();

        add_action('admin_menu', array($this, 'add_admin_menu'));
        add_action('admin_init', array($this, 'load_JS'));         
    }

    public function add_admin_menu()
    {
        add_menu_page('monTitre', 'Monplugin', 'manage_options','xxx', array($this, 'menu_html'),'dashicons-email');
        add_submenu_page('xxx', 'NouveauTitre', 'NouveauTitre', 'manage_options', 'xxx', array($this, 'menu_html'));

    }

    public function load_JS()
    {
        wp_register_script('myfunction',plugins_url( '/js/function.js', __FILE__ ));
        wp_enqueue_script('myfunction');
    }

Answer 1

You need to register them with action hook "wp_enqueue_scripts". Use "admin_enqueue_scripts" for admin scripts.

The function should be called using the wp_enqueue_scripts action hook if you want to call it on the front-end of the site, like in the examples above...

https://developer.wordpress.org/reference/functions/wp_enqueue_script/#notes