JS - ajax global callbacks #jquery

JS - ajax global callbacks.js

//on start
$('body').ajaxStart(function () {
  $('#ajax-status').show().text("Loading...");
});
//on stop
$('body').ajaxStop(function () {
  $('#ajax-status').fadeOut();
});
//on error
$('body').ajaxError(function (event, xhr, ajaxOptions, thrownError) {
  if (xhr.status === 401) {
    if ($("#login").is(":hidden")) {
      app.showLoginForm();
    }
    alert("Sorry, " + xhr.responseText.toLowerCase());
    // Focus cursor on field after showing alert.
    $("#login").find("input[type='text']:first").focus();
  }
  console.log("XHR Response: " + JSON.stringify(xhr));
});