//original code
                        var card = elements.create("card", { hidePostalCode: true, style: style });
            card.mount("#card-element");

//on form sumbit
stripe.confirmCardPayment(document.getElementById('tbClientSecret').value, {
                        payment_method: {
                            card: card
                        }
                    }).then(function (result) {
                        if (result.error) {
                            // Show error to your customer (e.g., insufficient funds)
                        } else {
                            // The payment has been processed!
                            if (result.paymentIntent.status === 'succeeded') {
                                // Show a success message to your customer
                                // There's a risk of the customer closing the window before callback
                                // execution. Set up a webhook or plugin to listen for the
                                // payment_intent.succeeded event that handles any business critical
                                // post-payment actions.
                            }
                        }
                    });