PaymentRequest Button confirmation

    // Confirm the PaymentIntent without handling potential next actions (yet).
    stripe.confirmCardPayment(
      clientSecret,
      {payment_method: ev.paymentMethod.id},
      {handleActions: false}
    ).then(function(confirmResult) {
      console.log(confirmResult);
      if (confirmResult.error) {
        // Report to the browser that the payment failed, prompting it to
        // re-show the payment interface, or show an error message and close
        // the payment interface.
        ev.complete('fail');
      } else {
        // Report to the browser that the confirmation was successful, prompting
        // it to close the browser payment method collection interface.
        ev.complete('success');
        // Let Stripe.js handle the rest of the payment flow.
        console.log(confirmResult.paymentIntent.status);

        // if authentication is required on this payment, confirm again
        if (confirmResult.paymentIntent.status == "requires_action") {
          stripe.confirmCardPayment(clientSecret).then(function(result) {
            console.log(result);
            if (result.error) {
              // The payment failed -- ask your customer for a new payment method.
            } else {
              // The payment has succeeded.
            }
          });
        }
      }
    });