A Boolean value that indicates if map rotation is available.
MapKit JS 5.0+
MapKit JS determines whether it is possible to rotate the map, and sets isRotationAvailable to true or false. When the value is true, users can rotate a map and any labels on the map will remain horizontal.
The value for isRotationAvailable is:
When the map is rendered by the client, such as by browsers that support WebGL.
When the Apple Maps server renders the map with a grid of image tiles, or when you implement your own tile overlays (addTileOverlay).