how do I properly escape the cancel button without throwing an error when using promises? My code throws an alert confirmation with a required checkbox. the code executes as it should to the user, but it throws an error in the console window:

Uncaught (in promise) cancel

//validation logic all passes...Now proceed to...



 else

    {



//determine and parse Discounts



 var myLookup = document.getElementsByName(myLookup)[0].value;

$.post( findthem.php, {myLookup: myLookup })

  .done(function(json_data){

     var theResponse1 = $.parseJSON(json_data);

     myDiscountRate = theResponse1['ourDiscountFound'];



    }).then( function(callback){



    priceRate = priceRate * (1 - (.01 * myDiscountRate));

    newRate = priceRate.toFixed(2);

}



swal({

  title: Confirm,

  input: 'checkbox',

  inputValue: 0,

  type: warning,

  inputPlaceholder: 'I agree to <a href=#blahblahMore></a> Your new Rate is :'+newRate,

  showCancelButton: true,

  confirmButtonText: 'Confirm',

  showLoaderOnConfirm: true,

  preConfirm: function(result) {

    return new Promise(function(resolve, reject) {

      if (result) {

        $.post(my.php, {

          Data: data

        })

        .done(

          function(json_data) {

            var data_array = $.parseJSON(json_data);

            var moreDetails = '';

            var resulting = 'error';

            var details = Transaction Declined

            if (data_array[trxApproved] == true) {

              resulting = 'success';

              details = Confirmed

              moreDetails = <br>Approved<b> + data_array[approved] + </b> +

                <br>Details Code: <b> + data_array[detailsCode] + </b>;

            }

            swal({

              type: resulting,

              title: details,

              html: <h1>Details: </h1> + data_array[messagetext] + moreDetails

            });

          }

        );

        resolve();

      } else {

          reject('You must agree to our Terms & Conditions ');

      }

    });

  },

  allowOutsideClick: false

  }).then(function(json_data) {



  })

});