How can I display loading icon or spin while my during ajax call. below is my code

```
 swal({
       title: "Confirm your transaction",
        html:true,
       showSpinner: true,
       showCancelButton: true,
        confirmButtonColor: "#DD6B55",
       confirmButtonText: "Send",
      closeOnConfirm: false
  },function () {
      $.ajax({
   type: "post",
    url: remoteUrl,
    data: largeParams,
   success: function (data) { }
  }).done(function (data) {
    swal("Thank you for your order", data, "success");
  }).error(function (data) {
  swal("Oops", "We couldn't connect to the server!", "error");
 });
});

```

Answers will be appreciated.