Creating admin menu item without page

I am writing a plugin in which the plugins menu item opens a modal, not a page. I have used the following to add the actual admin menu item

function add_modal_trigger_to_menu() {
 add_menu_page( 'ModalTrigger', 'ModalTrigger', 'manage_options', 'modal' );
 }

add_action( 'admin_menu', 'add_modal_trigger_to_menu' );

And I’ve added my html, css and js separately. Everything is working and the modal opens but of course the user is redirected to a blank page at admin.php?page=modal

How can I stop this?

• This topic was modified 8 years, 11 months ago by stevehadley.
• This topic was modified 8 years, 11 months ago by Jose Castaneda.