What is atmosphere-javascript?

atmosphere/atmosphere-javascript — explained in plain English

Analysis updated 2026-08-05 · repo last pushed 2026-02-24

★ 127JavaScriptAudience · developerComplexity · 3/5MaintainedSetup · moderate

Mindmap

mindmap
  root((repo))
    What it does
      Pushes updates to browser
      Auto picks best transport
      No manual fallback handling
    Transport methods
      WebSockets
      Server-Sent Events
      Long-polling
      JSONP
    Use cases
      Live chat
      Notifications
      Dashboards
      Sports ticker
    Tech stack
      JavaScript
      Node.js
      npm
      Maven
    Audience
      Web developers
      Real-time app builders
    Status
      Legacy and unmaintained
      Rewrite in TypeScript

mindmap root((repo)) What it does Pushes updates to browser Auto picks best transport No manual fallback handling Transport methods WebSockets Server-Sent Events Long-polling JSONP Use cases Live chat Notifications Dashboards Sports ticker Tech stack JavaScript Node.js npm Maven Audience Web developers Real-time app builders Status Legacy and unmaintained Rewrite in TypeScript

What do people build with it?

USE CASE 1

Add live chat or instant messaging to a web application where messages appear without a page refresh.

USE CASE 2

Build a live dashboard that updates with real-time data pushed from the server.

USE CASE 3

Implement browser notifications that appear the moment an event happens on the server.

USE CASE 4

Create a live sports score ticker that updates in real time without polling.

What is it built with?

JavaScriptNode.jsnpmMaven

How does it compare?

	atmosphere/atmosphere-javascript	863401402/image-provenance	buynao/aipath
Stars	127	124	131
Language	JavaScript	JavaScript	JavaScript
Last pushed	2026-02-24	—	—
Maintenance	Maintained	—	—
Setup difficulty	moderate	easy	easy
Complexity	3/5	1/5	2/5
Audience	developer	general	general

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · moderate Time to first run · 30min

Requires a compatible Atmosphere server backend to connect to, and the README is sparse so you may need to rely on community examples.

No license information is provided in the repository, so usage rights are unclear.

So what is it?

This is the legacy JavaScript client for Atmosphere, a framework that lets web servers push updates to browsers in real time. Instead of your web page constantly asking the server "anything new?", which is slow and wasteful, Atmosphere lets the server send data the moment it's available. Think of a chat app where messages appear instantly, or a live sports score ticker that updates without refreshing the page. The framework handles several different techniques for maintaining a live connection between browser and server. It supports WebSockets (the modern, always-on connection), Server-Sent Events, long-polling, HTTP streaming, and JSONP. The key benefit is that it automatically picks the best method that works for a given browser and server setup, so you don't have to worry about which technology to use or handle the fallbacks yourself. Developers building real-time features into web apps would use this, someone adding live chat, notifications, collaborative editing, or dashboards with constantly updating data. The project also offers a Node.js client for server-side JavaScript, and you can install it through npm or Maven depending on your stack. It's worth noting that this repository is no longer maintained. The team has rewritten the JavaScript client in TypeScript with bindings for React, Vue, and Svelte, and that newer version lives in a different repository. Anyone starting a new project should use the rewrite instead of this one. The README itself is quite sparse, suggesting you ask ChatGPT for an example to get started, which hints that the community and documentation may be more useful than the README alone.

Copy-paste prompts

Prompt 1

I want to add real-time push updates to my web app using the Atmosphere JavaScript client. Show me a basic example of subscribing to a server endpoint and receiving pushed messages in the browser.

Prompt 2

Help me set up the Atmosphere JavaScript client in my project. Should I use npm or Maven to install it, and what is the minimum code to open a connection and log incoming server-sent messages?

Prompt 3

I am building a live chat feature. Write a simple Atmosphere JavaScript client that connects to a chat endpoint, receives incoming messages, and displays them on the page.

Prompt 4

The Atmosphere JS client is no longer maintained and I want to migrate to the new TypeScript version. Help me map the old atmosphere.subscribe API to the new TypeScript client with React bindings.

Frequently asked questions