@microsoft/fast-element > SubscriberSet

SubscriberSet class

An implementation of Notifier that efficiently keeps track of subscribers interested in a specific change notification on an observable source.

Signature:
export declare class SubscriberSet implements Notifier

Remarks

This set is optimized for the most common scenario of 1 or 2 subscribers. With this in mind, it can store a subscriber in an internal field, allowing it to avoid Array#push operations. If the set ever exceeds two subscribers, it upgrades to an array automatically.

Constructors

ConstructorModifiersDescription
(constructor)(source, initialSubscriber)Creates an instance of SubscriberSet for the specified source.

Properties

PropertyModifiersTypeDescription
sourceanyThe source that this subscriber set is reporting changes for.

Methods

MethodModifiersDescription
has(subscriber)Checks whether the provided subscriber has been added to this set.
notify(args)Notifies all subscribers.
subscribe(subscriber)Subscribes to notification of changes in an object's state.
unsubscribe(subscriber)Unsubscribes from notification of changes in an object's state.