Function onerror

packages/socket.io/client-dist/socket.io.js:2248–2254

(err)

      }
      // Handle any error that happens while probing
      var onerror = function onerror(err) {
        var error = new Error("probe error: " + err);
        // @ts-ignore
        error.transport = transport.name;
        freezeTransport();
        _this8.emitReserved("upgradeError", error);
      };
      function onTransportClose() {
        onerror("transport closed");
      }