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# MapKitInitializationOptions

Initialization options for MapKit JS.

```
interface MapKitInitializationOptions
```

## Topics

### Callback and language

[`language?: string | null;`](/documentation/MapKitJS/MapKitInitializationOptions/language)

An ID that indicates the preferred language to use when displaying map labels, controls, directions, and other text.

[`authorizationCallback?: (this: null, done: (token: string) => void) => void;`](/documentation/MapKitJS/MapKitInitializationOptions/authorizationCallback)

A callback function that obtains a token.

### Loading libraries

[`libraries?: string[];`](/documentation/MapKitJS/MapKitInitializationOptions/libraries)

An array of libraries to load at initialization.


---

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