Function watchEvent

watchEvent<TObsv, TPath, TTarget, TEventName>(obj, path, event, watchCallback?): IHandle
Watches the given path on the given object for changes and automatically adds and removes the given event listener.
Type Parameters
- TObsv extends Observable
- TPath extends string
- TTarget
- TEventName extends string
Parameters
- obj: TObsv
  The object to watch.
- path: TPath
  The property path to an Evented object on the given object to watch.
- event: [TEventName, EventedCallback<EventTypes<EventTarget<TTarget>>[TEventName]>]
  The event and the listener to add to the Evented object.
- OptionalwatchCallback: ((newTarget: TTarget, oldTarget: TTarget) => void)
  The callback to invoke when the watched property changes. This is optional and will be invoked with the Evented object being watched.
  - - (newTarget, oldTarget): void
    - Parameters
      newTarget: TTarget
      oldTarget: TTarget
      Returns void
Returns IHandle
Throws
Error if the object is not observable.

Throws
Error if the path is to a non-configurable property on an observable.