Method onOpen

packages/engine.io-client/lib/socket.ts:580–587

* Called when connection is deemed open. * * @private

()

   * @private
   */
  protected onOpen() {
    debug("socket open");
    this.readyState = "open";
    SocketWithoutUpgrade.priorWebsocketSuccess =
      "websocket" === this.transport.name;
    this.emitReserved("open");
    this.flush();
  }

  /**
   * Handles a packet.