Method doWrite

packages/engine.io-client/lib/transports/websocket.node.ts:33–49

(packet: Packet, data: RawData)

  }

  doWrite(packet: Packet, data: RawData) {
    const opts: { compress?: boolean } = {};
    if (packet.options) {
      opts.compress = packet.options.compress;
    }

    if (this.opts.perMessageDeflate) {
      const len =
        // @ts-ignore
        "string" === typeof data ? Buffer.byteLength(data) : data.length;
      if (len < this.opts.perMessageDeflate.threshold) {
        opts.compress = false;
      }
    }

    this.ws.send(data, opts);
  }
}