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    "MapKit JS: 5.0.0 -"
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# callout

A delegate that enables you to customize the annotation’s callout.

```
get callout(): AnnotationCalloutDelegate | null;
set callout(callout: AnnotationCalloutDelegate | null);
```

## Discussion

The [`callout`](/documentation/MapKitJS/Annotation/callout) delegate is an optional object that implements methods for customizing the appearance, content, and animations of the callout that appear when selecting the annotation.

See [`AnnotationCalloutDelegate`](/documentation/MapKitJS/AnnotationCalloutDelegate) for details.

---

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