Enqueue CSS and JS

function add_theme_scripts() {
  wp_enqueue_style( 'style', get_stylesheet_uri() );
 
  wp_enqueue_style( 'slider', get_template_directory_uri() . '/css/slider.css', array(), '1.1', 'all');
 
  wp_enqueue_script( 'script', get_template_directory_uri() . '/js/script.js', array ( 'jquery' ), 1.1, true);

  wp_enqueue_script( 'fontawesome', 'https://kit.fontawesome.com/4f07b38120.js', array( 'jquery' ), false, false );
 
    if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
      wp_enqueue_script( 'comment-reply' );
    }
}
add_action( 'wp_enqueue_scripts', 'add_theme_scripts' );

For child theme directory

Need to use get_stylesheet_directory_uri()

 wp_enqueue_script( 'spidochetube', get_stylesheet_directory_uri() . '/JS/jquery.spidochetube.min.js', array ( 'jquery' ), 1.1, true);