Drupal / jQuery Exit Modal: Show the user a modal when they are attempting to leave your website

Drupal-Exit-Modal.js

(function($, Drupal) {
  "use strict";
  var exitModalCookie = $.cookie("__exitModal");
  // set up exit intent listener to fire modal
  var exitIntent = function(e) {
    if (e.clientY < 0 ) {
      // init remodal
      var exitModal = $('[data-remodal-id=exit-modal]').remodal();
      exitModal.open();
      // prevent sowing this more than once per page
      document.removeEventListener('mouseleave', exitIntent, false);
    }
  }
  // if user is logged out. Fire that exit modal.
  if (!exitModalCookie) {
    document.addEventListener('mouseleave', exitIntent, false);
    $.cookie('__exitModal', 1, {path: '/', expires: 1});
  }
})(jQuery, Drupal);