Class EventEmitter

Hierarchy (view full)

EventEmitter

Index

Constructors

Methods

addListener emit eventNames getMaxListeners listenerCount listeners on once prependListener prependOnceListener removeAllListeners removeListener setMaxListeners

Constructors

constructor

new EventEmitter(): EventEmitter
Returns EventEmitter

Methods

addListener

addListener(event, listener): this
Parameters
- event: string | symbol
- listener: ((...args) => void)
  - - (...args): void
    - Parameters
      Rest ...args: any[]
      Returns void
Returns this

emit

emit(event, ...args): boolean
Parameters
- event: string | symbol
- Rest ...args: any[]
Returns boolean

eventNames

eventNames(): (string | symbol)[]
Returns (string | symbol)[]

getMaxListeners

getMaxListeners(): number
Returns number

listenerCount

listenerCount(type): number
Parameters
- type: string | symbol
Returns number

listeners

listeners(event): Function[]
Parameters
- event: string | symbol
Returns Function[]

on

on(event, listener): this
Parameters
- event: string | symbol
- listener: ((...args) => void)
  - - (...args): void
    - Parameters
      Rest ...args: any[]
      Returns void
Returns this

once

once(event, listener): this
Parameters
- event: string | symbol
- listener: ((...args) => void)
  - - (...args): void
    - Parameters
      Rest ...args: any[]
      Returns void
Returns this

prependListener

prependListener(event, listener): this
Parameters
- event: string | symbol
- listener: ((...args) => void)
  - - (...args): void
    - Parameters
      Rest ...args: any[]
      Returns void
Returns this

prependOnceListener

prependOnceListener(event, listener): this
Parameters
- event: string | symbol
- listener: ((...args) => void)
  - - (...args): void
    - Parameters
      Rest ...args: any[]
      Returns void
Returns this

removeAllListeners

removeAllListeners(event?): this
Parameters
- Optional event: string | symbol
Returns this

removeListener

removeListener(event, listener): this
Parameters
- event: string | symbol
- listener: ((...args) => void)
  - - (...args): void
    - Parameters
      Rest ...args: any[]
      Returns void
Returns this

setMaxListeners

setMaxListeners(n): this
Parameters
- n: number
Returns this