Function layerDialogOpened

layerDialogOpened(listenerId, fn): void
JMap.Event.Form.on.layerDialogOpened

This event is triggered each time a layer form dialog is opened (attribute and external forms).
Parameters
- listenerId: string
  Your listener id (must be unique)
- fn: ((params) => void)
  Your listener function
  - - (params): void
    - Parameters
      params: JFormLayerDialogOpenEventParams
      Returns void
Returns void
Example
```
// log a message in the console once a form layer dialog has been opened
JMap.Event.Form.on.layerDialogOpened(
  "custom-form-layer-dialog-opened",
  params => console.info(
    `Layer form dialog opened for layer id="${params.layerId}"`,
    params.attributeForm,
    params.externalForms
  )
)
```