Browser Support

Chrome 4+ · Firefox 4+ · Safari 4+ · Edge 12+

Note: Requires HTTPS or localhost environment.

Overview

This section ties together everything you've learned: connection management → heartbeat keep-alive → room message broadcast → reconnection recovery. The app consists of server (Node.js + ws) and client, about 200 lines total.

Notes

• Cross-device access: Change server IP to LAN IP (e.g. ws://192.168.1.x:8080), update client URL accordingly
• External deployment: Production server must use wss:// (add TLS proxy like Nginx), client uses wss://
• Close codes: If graceful shutdown needed, send a { type: 'leave' } message before close()
• Message frequency: Chat doesn't have high message volume, but for high-frequency data streams (like games) use binary protocol and control frame rate