ASP.NET SignalR 2.x JavaScript Client

The `signalr` npm package provides the official JavaScript client for Microsoft's **ASP.NET SignalR 2.x** framework, enabling real-time web functionality such as bi-directional communication between server and client. This client is specifically designed to interact with ASP.NET (full .NET Framework) server applications and is distinct from the newer `ASP.NET Core SignalR` client found under `@microsoft/signalr`. The current stable version is 2.4.3, which primarily includes bug fixes and minor improvements, reflecting its status as a maintenance-mode library. Releases are generally patch-focused with no new features planned. A key characteristic is its reliance on jQuery, functioning as a jQuery plugin to provide its `$.hubConnection` API, and its compatibility with the older ASP.NET runtime environment.