# Optional Parameters for the Configuration Object (/archive/paypal-plus/de/how-to/optional-params)



> **Note:** **Important:** PayPal Plus Germany is not available for new integrations. PayPal provides this documentation to support existing integrations. For new integrations, see the [PayPal Checkout Integration Guide](/checkout).

| Parameter      | Description                     |
| -------------- | ------------------------------- |
| `mode: "live"` | The library that loads the PSP: |

* `live` loads from paypal.com.
* `sandbox` loads from sandbox.paypal.com.

> **Note:** **Note:** The library emits a warning to the console if mode is set to `sandbox`. This warning is displayed in `live` mode only for required parameters.

Default is `live`.| |`preselection: \"none\"`|The payment method or methods that appear:

* `none`. nothing
* `paypal`. PayPal Wallet
* `Vorkasse` or any of its synonyms. Synonyms are: `Überweisung`, `Vorauszahlung`, `Vorausbezahlung`, `Vorauskasse`, `Vorabzahlung`, `prepayment`, `advance payment`, `payment in advance`, `pay in advance`.

\| |`language: \"en_US\"`|ISO 639-1 or ISO 3166-1 alpha-2. The language in which to render the PayPal PLUS PSP. To keep the buyer's content consistent, this language must be the language of the merchant's shop.

> **Note:** **Note:** Use the language code of the shop's front end to set the PSP language code. Unsupported languages default to English.

\| |`onContinue: callback`|`callback` or a `string`. The API interprets a string as the ID of a form in the document. The user submits this form when they click the inside \*\*Continue\*\* button.| |`onLoad: callback`|Upon successful load of the iframe, the callback function.| |`enableContinue: callback`|`callback` or a `string`. The API interprets a string as the ID of a form in the document. he user submits this form when they click the inside \*\*Continue\*\* button. For `callback`, the API invokes the callback function.| |`disableContinue: callback`|`callback` or a `string`. The API interprets a string as the ID of a form in the document. he user submits this form when they click the inside \*\*Continue\*\* button. For `callback`, the API invokes the callback function.| |`deselectPaymentMethod`|When all payment methods are deselected, the merchant's webpage displays a message prompting the buyer to select a payment method to continue. The \*\*Continue\*\* button is disabled.| |`useraction: \"commit\"`|The merchant-implemented checkout flow. Value is:

* `commit`. The buyer must review and confirm payment on the PayPal site.
* `continue`. The buyer must review and confirm payment on a review page.

\| |`showLoadingIndicator: \"false\"`|`true` or `false`. Default is `false`.| |`onThirdPartyPaymentMethodSelected : callback`|When a user selects a third-party method, the API invokes the callback function and sends the method name.| |`onThirdPartyPaymentMethodDeselected : callback`|When the user selects another payment method, the API clears the third-party method and invokes the callback function. |