Engineers live, real-time web applications. Learn how bi-directional WebSockets work, build Socket.io room broadcasting, implement typing indicators, and handle online user presence states.
Attach Socket.io server listener to Express HTTP server.
Emit and listen for custom messaging events between client and server.
Join specific room channels and broadcast messages to room members.
Track online/offline status and clean up socket listeners on component unmount.
Instant messaging app with WebSocket channels, online presence, and typing indicators.