Class EventEmitter<Events>

constructor

• new EventEmitter<Events>(all?): EventEmitter<Events>

• Type Parameters

  • Events extends GenericEventMap

  Parameters

  • Optional all: EventHandlerMap<Events>

  Returns EventEmitter<Events>

all

emit

• emit<Key>(type, ...payload): void

• Invoke all handlers for the given type. If present, '*' handlers are invoked after type-matched handlers.

  Note: Manually firing '*' handlers is not supported.

  Type Parameters

  • Key extends string | number | symbol

  Parameters

  • type: Key

    The event type to invoke
  • Rest ...payload: _ToTuple<Events[Key]>

    Any value to each handler

  Returns void

off

• off<Key>(type, handler?): void

• Remove an event handler for the given type. If handler is omitted, all handlers of the given type are removed.

  Type Parameters

  • Key extends string | number | symbol

  Parameters

  • type: Key

    Type of event to unregister handler from, or '*'
  • Optional handler: _Handler<Events[Key]>

    Handler function to remove

  Returns void
• off(): void

• Remove all event handlers.

  Returns void

on

• on<Key>(type, handler): _RemoveEventListener

• Register an event handler for the given type.

  Type Parameters

  • Key extends string | number | symbol

  Parameters

  • type: Key

    Type of event to listen for, or '*' for all events
  • handler: _Handler<Events[Key]>

    Function to call in response to given event

  Returns _RemoveEventListener
• on(type, handler): _RemoveEventListener

• Register an event handler for all events.

  Parameters

  • type: "*"

    '*'
  • handler: _WildcardHandler<Events>

    Function to call in response to given event

  Returns _RemoveEventListener