Pagekit\View\View::on PHP Method

    public function on($event, $listener, $priority = 0)
    {
        $this->events->on($event, $listener, $priority);
    }

 /**
  * {@inheritdoc}
  */
 public function register(View $view)
 {
     $view->on('head', function ($event) use($view) {
         $view->trigger('scripts', [$this->scripts]);
         $event->addResult($this->render());
     }, 5);
 }