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real-time
websockets
networking
http

Real-Time Delivery: Polling, Long Polling, SSE & WebSockets

13 questions

When to reach for short polling, long polling, Server-Sent Events, or WebSockets — and how each handles reconnection and message ordering. Handshakes, headers, and trade-offs are checked against the specs (RFC 6455, WHATWG HTML) and verified in Node.