# Closing SSE Connections: A Browser Compatibility Deep Dive

DevFeed: [Closing SSE Connections: A Browser Compatibility Deep Dive](<https://devfeed.tech/articles/closing-sse-connections-a-browser-compatibility-deep-dive-37520.md>)

Original publisher: [Read original article](<https://blog.apartment304.com/sse-close-connection/>)

Author: James Heller

Published: 2025-11-20T19:00:00Z

Content type: tutorial

Language: en

Sources: [Apartment 304](<https://devfeed.tech/sources/apartment-304.md>)

Topics: [Server-sent events (SSE)](<https://devfeed.tech/topics/server-sent-events-sse.md>), [JavaScript](<https://devfeed.tech/topics/javascript.md>), [htmx](<https://devfeed.tech/topics/htmx.md>), [HTTP](<https://devfeed.tech/topics/http.md>), [Firefox](<https://devfeed.tech/topics/firefox.md>), [Chrome](<https://devfeed.tech/topics/chrome.md>)

Tags: [ajax](<https://devfeed.tech/tags/ajax.md>), [apartment-304](<https://devfeed.tech/tags/apartment-304.md>), [browser](<https://devfeed.tech/tags/browser.md>), [compatibility](<https://devfeed.tech/tags/compatibility.md>), [custom-software-solutions](<https://devfeed.tech/tags/custom-software-solutions.md>), [devops](<https://devfeed.tech/tags/devops.md>), [devops-engineer](<https://devfeed.tech/tags/devops-engineer.md>), [htmx](<https://devfeed.tech/tags/htmx.md>), [http](<https://devfeed.tech/tags/http.md>), [implementation](<https://devfeed.tech/tags/implementation.md>), [issue](<https://devfeed.tech/tags/issue.md>), [javascript](<https://devfeed.tech/tags/javascript.md>), [multiplayer](<https://devfeed.tech/tags/multiplayer.md>), [software-architecture](<https://devfeed.tech/tags/software-architecture.md>), [software-development](<https://devfeed.tech/tags/software-development.md>), [software-engineer](<https://devfeed.tech/tags/software-engineer.md>), [sse](<https://devfeed.tech/tags/sse.md>)

## AI overview

This tutorial explains how Server-Sent Events connections can remain open inconsistently across browsers when users navigate away. Using the multiplayer mystery game Whodunit with HTMX as an example, it describes SSE connection tracking and a client-side JavaScript approach for robust cleanup.

## Source excerpt

When browsers leave connections dangling, your app can get stuck waiting for users who are already gone. Let's solve the mystery of closing SSE connections.