Function pitchStart

pitchStart(listenerId, fn): void
JMap.Event.Map.on.pitchStart

This event is triggered when pitch on the map start.
Parameters
- listenerId: string
  Your listener id (must be unique for all map events)
- fn: ((params) => void)
  Your listener function
  - - (params): void
    - Parameters
      params: JMapEventPitchParams
      Returns void
Returns void
Example
```
// When the pitch of the map start, it will display a message in the console
JMap.Event.Map.on.pitchStart(
   "custom-map-pitch-start",
   args => console.log(`The pitch is starting (pitch="${args.pitch})")`
)
```