I want to pass a header through my Hubconnection builder to my signalrHub. In other words, how do I accomplish this Using typescript. Here is the C# implementation I have: connection = new HubConnectionBuilder() .WithUrl("https://localhost:53251" + "/simpleHub", options => { //set the header options.Headers.Add("Device-ID", deviceID); }) .Build(); How can I do the same with typescript client ? I tried several things I found online, the latest was : this._hubConnection = new HubConnectionBuilder() .withUrl("https://localhost:53251" + "/simpleHub?Device-ID=fc8dsc72f-1456-4bc2-b1ea-ac34b9c3559e", { }) .configureLogging(LogLevel.Debug) .withAutomaticReconnect() .build(); But Passing the header this way, causes the server not to receive the header. Please does anyone have a solution ? please. Continue reading...