EventEmitter Class — vite Architecture

Source Code

packages/vite/src/types/ws.d.ts lines 34–300

declare class WebSocket extends EventEmitter {
  /** The connection is not yet open. */
  static readonly CONNECTING: 0
  /** The connection is open and ready to communicate. */
  static readonly OPEN: 1
  /** The connection is in the process of closing. */
  static readonly CLOSING: 2
  /** The connection is closed. */
  static readonly CLOSED: 3

  binaryType: 'nodebuffer' | 'arraybuffer' | 'fragments'
  readonly bufferedAmount: number
  readonly extensions: string
  /** Indicates whether the websocket is paused */
  readonly isPaused: boolean
  readonly protocol: string
  /** The current state of the connection */
  readonly readyState:
    | typeof WebSocket.CONNECTING
    | typeof WebSocket.OPEN
    | typeof WebSocket.CLOSING
    | typeof WebSocket.CLOSED
  readonly url: string

  /** The connection is not yet open. */
  readonly CONNECTING: 0
  /** The connection is open and ready to communicate. */
  readonly OPEN: 1
  /** The connection is in the process of closing. */
  readonly CLOSING: 2
  /** The connection is closed. */
  readonly CLOSED: 3

  onopen: ((event: WebSocket.Event) => void) | null
  onerror: ((event: WebSocket.ErrorEvent) => void) | null
  onclose: ((event: WebSocket.CloseEvent) => void) | null
  onmessage: ((event: WebSocket.MessageEvent) => void) | null

  constructor(address: null)
  constructor(
    address: string | URL,
    options?: WebSocket.ClientOptions | ClientRequestArgs,
  )
  constructor(
    address: string | URL,
    protocols?: string | string[],
    options?: WebSocket.ClientOptions | ClientRequestArgs,
  )

  close(code?: number, data?: string | Buffer): void
  ping(data?: any, mask?: boolean, cb?: (err: Error) => void): void
  pong(data?: any, mask?: boolean, cb?: (err: Error) => void): void
  send(data: any, cb?: (err?: Error) => void): void
  send(
    data: any,
    options: {
      mask?: boolean | undefined
      binary?: boolean | undefined
      compress?: boolean | undefined
      fin?: boolean | undefined
    },
    cb?: (err?: Error) => void,
  ): void
  terminate(): void

  /**
   * Pause the websocket causing it to stop emitting events. Some events can still be
   * emitted after this is called, until all buffered data is consumed. This method
   * is a noop if the ready state is `CONNECTING` or `CLOSED`.
   */
  pause(): void
  /**
   * Make a paused socket resume emitting events. This method is a noop if the ready
   * state is `CONNECTING` or `CLOSED`.
   */
  resume(): void

  // HTML5 WebSocket events
  addEventListener(
    method: 'message',
    cb: (event: WebSocket.MessageEvent) => void,