observePropertyAsync

Starts observing one or more properties, asynchronously.

protected

protected observePropertyAsync(...properties: Array<keyof T>): this

Notes

• Property changes are triggered when the property is assigned a different value, or when a referenced managed object emits a ManagedChangeEvent.
• Changes are handled by Observer.handlePropertyChange() asynchronously, which may be overridden. The base implementation of that method looks for a method called on...Change (e.g. onFooChange for the foo property) and calls it with the the latest property value and possibly a change event as arguments. Returned promises are awaited to handle errors, if needed.

Related

• class ObserverThe base class for an observer that watches a particular ManagedObject.
• observeProperty(…properties) protectedStarts observing one or more properties.
• handlePropertyChange(property, value, event?) protectedA method that’s called when an observed property has been changed on the observed object, may be overridden.