Function emitCustomEvent

packages/vite/src/node/server/ws.ts:287–299

(
    event: T,
    data: InferCustomEventPayload<T>,
    socket: WebSocketRaw,
  )

  }

  const emitCustomEvent = <T extends string>(
    event: T,
    data: InferCustomEventPayload<T>,
    socket: WebSocketRaw,
  ) => {
    const listeners = customListeners.get(event)
    if (!listeners?.size) return

    const client = getSocketClient(socket)
    for (const listener of listeners) {
      listener(data, client)
    }
  }

  wss.on('connection', (socket) => {
    socket.on('message', (raw) => {