Function sourceChange

sourceChange(listenerId, fn): void
JMap.Event.Layer.on.sourceChange

This event is triggered when a layer's source has changed (for instance after modifying, adding or deleting a feature).
Parameters
- listenerId: string
  Your listener id (must be unique for all layer events)
- fn: ((params) => void)
  Your listener function
  - - (params): void
    - Parameters
      params: JLayerEventParams
      Returns void
Returns void
Example
```
// Each time a layer's source has changed, it will display a message
// in the console
JMap.Event.Layer.on.sourceChange(
   "custom-source-change",
   params => {
     console.log(`Source for layer id="${params.layerId}" has changed"`)
   }
)
```