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Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

server-sent events

A way for a server to keep sending updates to a web page over one long HTTP response.

Server-sent events stream text events from server to browser over a single HTTP response with content type text/event-stream; the browser's EventSource reconnects automatically.

Examples

  • The greenhouse dashboard opens GET /events with EventSource; the server answers text/event-stream and writes a new event each time a reading arrives, and a reconnect sends Last-Event-ID to resume.

See also

WebSocket polling HTTP
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