Building a web client using the SignalR JavaScript library

Next, we will add the SignalR client-side JavaScript library so that we can use it on a web page:

1. Open a command prompt or terminal for the Northwind.SignalR.Service.Client.Mvc project/folder.
2. Install the Library Manager CLI tool, as shown in the following command:

   dotnet tool install -g Microsoft.Web.LibraryManager.Cli
   

   This tool might already be installed globally. To update it to the latest version, repeat the command but replace install with update.

3. Enter a command to add the signalr.js and signalr.min.js libraries to the project from the unpkg source, as shown in the following command:

   libman install @microsoft/signalr@latest -p unpkg -d wwwroot/js/signalr --files dist/browser/signalr.js --files dist/browser/signalr.min.js
   

   Never copy long commands from a PDF and paste them directly to the command prompt. Always clean them up in...