## Confirm a Klarna payment

`stripe.confirmKlarnaPayment(clientSecret: string, data?: object, options?: object)`

Use `stripe.confirmKlarnaPayment` in the Klarna payment method creation flow when the customer submits your payment form.
When called, it will confirm the [PaymentIntent](https://docs.stripe.com/api/payment_intents.md) with `data` you provide, and it will automatically redirect the customer to authorize the transaction.
Once authorization is complete, the customer will be redirected back to your specified `return_url`.

When you confirm a `PaymentIntent`, it needs to have an attached [PaymentMethod](https://docs.stripe.com/api/payment_methods.md).
In addition to confirming the `PaymentIntent`, this method can automatically create and attach a new `PaymentMethod` for you.
If you have already attached a `PaymentMethod` you can call this method without needing to provide any additional data.
These use cases are detailed in the sections that follow.

> Note that `stripe.confirmKlarnaPayment` may take several seconds to complete.
> During that time, you should disable your form from being resubmitted and show a waiting indicator like a spinner.
> If you receive an error result, you should be sure to show that error to the customer, re-enable the form, and hide the waiting indicator.

- `clientSecret`
  The [client secret](https://docs.stripe.com/api/payment_intents/object.md#payment_intent_object-client_secret) of the `PaymentIntent`.

- `data`
  Data to be sent with the request.
Refer to the [Payment Intents API](https://docs.stripe.com/api/payment_intents/confirm.md) for a full list of parameters.
    - `payment_method`
      Either the `id` of an existing [PaymentMethod](https://docs.stripe.com/api/payment_methods.md), or an object containing data to create a `PaymentMethod` with.
See the use case sections below for details.
    - `return_url`
      The url your customer will be directed to after they complete authentication.

- `options`
  An options object to control the behavior of this method.
    - `handleActions`
      Set this to `false` if you want to [manually handle the authorization redirect](https://docs.stripe.com/payments/klarna/accept-a-payment.md#handle-redirect).
Default is `true`.

### Without an existing payment method

### Data argument properties

- `return_url`
  The url your customer will be directed to after they complete authentication.

### Example

```title
Confirm without existing payment method
```

### With an existing payment method

### Data argument properties

- `payment_method`
  The `id` of an existing `PaymentMethod`.

- `return_url`
  The url your customer will be directed to after they complete authentication.

### Example

```title
Confirm with existing payment method
```

### With an attached PaymentMethod

### Example

```title
Confirm with an attached PaymentMethod
```

### Example

```title
Confirm a Klarna payment
```