Possible connection leak? A new SSE connection is opened on every onerror status=undefined · Yaffle/EventSource#144

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help wanted

Description

Hi @Yaffle need your help in figuring this out. I see a pattern where a new connection is opened on every onerror and the status for the on error is status=undefined. The client does not get any data through SSE connection and after few seconds onerror with status=undefined is invoked again and a new connection is made to the backend. All these connections kept open till the browser/session is closed and all the connections are closed together. Could you please help in figuring this out and understand why this is happening and help in fixing it?

Contributor guide

Tech stack: javascript
Domain: frontend
Issue type: bug
Difficulty: 3
Estimated time: 1-3 hours
Activity status: stale
Clarity: needs investigation
Prerequisites: Basic understanding of EventSourceJavaScript debugging skills
Newbie friendliness: 30
Research direction: Investigate the reconnection logic in the EventSource polyfill, specifically the onerror handler. Check for any conditions where status is undefined and why it triggers a new connection. Look at the closed PRs or issues for similar problems. Test with a simple server that sends events and observe the network behavior.