Method onOpen

packages/engine.io-client/lib/socket.ts:989–998

()

  private _upgrades: string[] = [];

  override onOpen() {
    super.onOpen();

    if ("open" === this.readyState && this.opts.upgrade) {
      debug("starting upgrade probes");
      for (let i = 0; i < this._upgrades.length; i++) {
        this._probe(this._upgrades[i]);
      }
    }
  }

  /**
   * Probes a transport.