htmx-stream

HTMX + Server-Sent Events streaming

An HTMX page that subscribes to an SSE endpoint and updates a DOM element in real time as the server streams events. Demonstrates:

• Setting the SSE response headers correctly (text/event-stream, no-cache, keep-alive).
• Using http.Flusher to push individual events.
• Cleanly stopping on r.Context().Done() when the client disconnects.
• Pairing this with the htmx-sse extension on the browser side.

Run

cd examples/htmx-stream
go run .

Open http://localhost:8080. A random integer streams to the page every 100 ms. Close the tab and the goroutine exits — context cancellation is the only stop signal.

Notes

This example uses raw text/event-stream for direct HTMX consumption. MCP's separate request-scoped SSE behavior is covered under resource subscriptions.