how to get response ajax and status code code example

Example: how to get the status of other urls in ajax

$('#main-menu a').on('click', function(event) {
  event.preventDefault();

  $.ajax(this.href, {
    success: function(data) {
      $('#main').html($(data).find('#main *'));
      $('#notification-bar').text('The page has been successfully loaded');
},
    error: function() {
      $('#notification-bar').text('An error occurred');
    }
  });
});