The StateManager object dispatches a StateChangedEvent object when state data changes for a session or archive. There are two types of StateChangedEvent events:
"key:foo" to listen to events when the value
of the foo key changes.The changedValues property of the StateChangedEvent object is an object containing properties that are
key-value pairs of the changed state data.
For an example, see the StateManager documentation.
The StateChangedEvent object has the following properties:
changedValues (Object) — An object containing properties that are key-value pairs of the changed data.
For the initial event dispatched, the changedValues property contains current state. For a
changed event, it contains the entire current state, with a key-value pair for each property in the state.
For a changed:keyName event, the initial event's changedValues property contains one property,
pertaining to the specific key's (and the value is set to null if the key is not set in the state). An initial
event is dispatched to each unique event listener you register, and the event's changedValues property reflects
the state at the time you add the event listener.
For subsequent events (after the initial event), the changedValues property contains key-value pairs for
changed properties in the state. For a changed:keyName event, the changedValues property contains
one property, for the specific key, and the event is only dispatched when that key's value changes. A value is set to
null when a key is deleted.
target (Object) — The StateManager object that dispatched the event.
type (String) — The type of event. The type property is either
"changed" or of the form "changed:keyName".