Interface SubscribableMixin

addListenerOn

• addListenerOn(eventEmitter, eventType, listener, context): void

• Special form of calling addListener that guarantees that a subscription must be tied to a component instance, and therefore will be cleaned up when the component is unmounted. It is impossible to create the subscription and pass it in - this method must be the one to create the subscription and therefore can guarantee it is retained in a way that will be cleaned up.

  Parameters

  • eventEmitter: any

    emitter to subscribe to.
  • eventType: string

    Type of event to listen to.
  • listener: (() => any)

    Function to invoke when event occurs.

    • • (): any

      • Returns any

  • context: any

    Object to use as listener context.

  Returns void