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Class ExtendedEventEmitter

Extended Event Emitted class

const emitter = new EmitterEventPayload();

// promise will be rejected in 20 secs
// if no one event has been received with type 'ref-uuid-value'
// otherwise promise will be fulfilled with payload object
const promise = emitter.onceWithTimeout('ref-uuid-value', 20000)

Hierarchy

  • EventEmitter
    • ExtendedEventEmitter

Index

Interfaces

Type aliases

Constructors

Properties

Methods

Type aliases

Static ArgumentMap

ArgumentMap<T>: {}

Type parameters

  • T: object

Type declaration

Static EventArgs

EventArgs<T, K>: Parameters<EventListener<T, K>>

Type parameters

Static EventListener

EventListener<T, K>: T extends string | symbol ? (...args: any[]) => void : (...args: ArgumentMap<Exclude<T, string | symbol>>[Extract<K, keyof T>]) => void

Type parameters

Static EventNames

EventNames<T>: T extends string | symbol ? T : keyof T

Type parameters

Static ValidEventTypes

ValidEventTypes: string | symbol | object

object should be in either of the following forms:

interface EventTypes {
  'event-with-parameters': any[]
  'event-with-example-handler': (...args: any[]) => void
}

Constructors

constructor

Properties

Static EventEmitter

EventEmitter: EventEmitterStatic

Static prefixed

prefixed: string | boolean

Methods

addListener

  • addListener<T>(event: T, fn: EventEmitter.EventListener<string | symbol, T>, context?: Context): this

  • Type parameters

    • T: EventEmitter.EventNames<string | symbol>

    Parameters

    • event: T
    • fn: EventEmitter.EventListener<string | symbol, T>
    • Optional context: Context

    Returns this

emit

  • emit<T>(event: T, ...args: EventEmitter.EventArgs<string | symbol, T>): boolean

  • Calls each of the listeners registered for a given event.

    Type parameters

    • T: EventEmitter.EventNames<string | symbol>

    Parameters

    • event: T
    • Rest ...args: EventEmitter.EventArgs<string | symbol, T>

    Returns boolean

eventNames

  • eventNames(): Array<EventEmitter.EventNames<string | symbol>>

  • Return an array listing the events for which the emitter has registered listeners.

    Returns Array<EventEmitter.EventNames<string | symbol>>

listenerCount

  • listenerCount(event: EventEmitter.EventNames<string | symbol>): number

  • Return the number of listeners listening to a given event.

    Parameters

    • event: EventEmitter.EventNames<string | symbol>

    Returns number

listeners

  • listeners<T>(event: T): Array<EventEmitter.EventListener<string | symbol, T>>

  • Return the listeners registered for a given event.

    Type parameters

    • T: EventEmitter.EventNames<string | symbol>

    Parameters

    • event: T

    Returns Array<EventEmitter.EventListener<string | symbol, T>>

off

  • off<T>(event: T, fn?: EventEmitter.EventListener<string | symbol, T>, context?: Context, once?: undefined | false | true): this

  • Type parameters

    • T: EventEmitter.EventNames<string | symbol>

    Parameters

    • event: T
    • Optional fn: EventEmitter.EventListener<string | symbol, T>
    • Optional context: Context
    • Optional once: undefined | false | true

    Returns this

on

  • on<T>(event: T, fn: EventEmitter.EventListener<string | symbol, T>, context?: Context): this

  • Add a listener for a given event.

    Type parameters

    • T: EventEmitter.EventNames<string | symbol>

    Parameters

    • event: T
    • fn: EventEmitter.EventListener<string | symbol, T>
    • Optional context: Context

    Returns this

once

  • once<T>(event: T, fn: EventEmitter.EventListener<string | symbol, T>, context?: Context): this

  • Add a one-time listener for a given event.

    Type parameters

    • T: EventEmitter.EventNames<string | symbol>

    Parameters

    • event: T
    • fn: EventEmitter.EventListener<string | symbol, T>
    • Optional context: Context

    Returns this

onceWithTimeout

  • Wait when event with type will be emitted for timeout ms.

    emitter.onceWithTimeout('d6910a9d-ea24-5fc6-a654-28781ef21f8f', 20000)
// => Promise

    Parameters

    Returns Promise<EmitterEventPayload>

removeAllListeners

  • removeAllListeners(event?: EventEmitter.EventNames<string | symbol>): this

  • Remove all listeners, or those of the specified event.

    Parameters

    • Optional event: EventEmitter.EventNames<string | symbol>

    Returns this

removeListener

  • removeListener<T>(event: T, fn?: EventEmitter.EventListener<string | symbol, T>, context?: Context, once?: undefined | false | true): this

  • Remove the listeners of a given event.

    Type parameters

    • T: EventEmitter.EventNames<string | symbol>

    Parameters

    • event: T
    • Optional fn: EventEmitter.EventListener<string | symbol, T>
    • Optional context: Context
    • Optional once: undefined | false | true

    Returns this

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