SockJS-node

SockJS-node is the server-side counterpart of SockJS-client, a browser library that provides a WebSocket-like API with cross-browser fallback transports. Current stable version is 0.3.24. It allows low-latency, full-duplex communication via WebSocket, polling, or streaming, compatible with older browsers. The project is in maintenance mode with infrequent updates; alternatives like WebSocket or Socket.IO may be preferred for new projects. Key differentiator: simple API, multiple transports, no build tools required.