Key Takeaways
- WebSockets enable real-time bidirectional communication: both client and server can send data at any time.
- Use WebSockets for chat, live notifications, collaborative editing, and real-time dashboards.
- For one-way server-to-client updates, Server-Sent Events (SSE) are simpler and more efficient.
WebSocket vs Server-Sent Events vs Polling
| Method | Direction | Best For |
|---|---|---|
| WebSocket | Bidirectional | Chat, multiplayer, collaborative editing |
| Server-Sent Events | Server to client only | Live notifications, dashboards, activity feeds |
| Long polling | Simulated push via repeated requests | Fallback when WebSocket/SSE unavailable |
| Short polling | Regular interval requests | Low-frequency updates (every 30s+) |
Most real-time features only need SSE, not WebSocket. If the server pushes updates and the client just displays them (stock prices, notifications, feed updates), SSE is simpler, auto-reconnects, and works with standard HTTP infrastructure.
Frequently Asked Questions
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