Server-Sent Events

Stream real-time updates from server to client using Server-Sent Events. Simpler than WebSocket for one-way data flow, with built-in reconnection and event ID tracking.

Usage

Ask about implementing SSE endpoints, handling reconnection, or choosing between SSE and WebSocket.

Examples

• "How do I implement a Server-Sent Events endpoint in Node.js?"
• "What happens when an SSE connection drops?"
• "When should I use SSE instead of WebSocket?"

Guidelines

• Use SSE when data flows only from server to client
• The EventSource API handles reconnection automatically with Last-Event-ID
• Set appropriate retry intervals for your use case
• Use named events to multiplex different data types on one connection
• SSE works through HTTP/2 multiplexing without connection limits