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References and Resources

Official Specifications​

Documentation and Tutorials​

MDN Web Docs​

  • Using Server-Sent Events
    • Comprehensive guide from Mozilla Developer Network
    • Includes browser compatibility information
    • Client and server implementation examples

HTML5 Tutorials​

JavaScript Libraries​

  • yaj-sse
    • SSE Polyfill without jQuery dependency
    • Port from version 0.1.4 of jQuery SSE
    • Lightweight and framework-agnostic

Server Implementations​

PHP​

header('Content-Type: text/event-stream');
header('Cache-Control: no-cache');
echo "data: message\n\n";
flush();

Node.js​

res.writeHead(200, {
    'Content-Type': 'text/event-stream',
    'Cache-Control': 'no-cache',
    'Connection': 'keep-alive'
});
res.write('data: message\n\n');

Python (Flask)​

from flask import Response, stream_with_context

def event_stream():
    yield 'data: message\n\n'

@app.route('/stream')
def stream():
    return Response(event_stream(), mimetype='text/event-stream')

Browser Support​

Native EventSource Support​

BrowserVersionSupport
Chrome6+✅ Full support
Firefox6+✅ Full support
Safari5+✅ Full support
Opera11+✅ Full support
Edge79+✅ Full support (Chromium)
IEAll❌ No support

Polyfill Coverage​

jQuery SSE provides automatic fallback for browsers without native support using Ajax long-polling.

Alternative Technologies​

WebSockets​

  • Pros: Full-duplex communication, lower latency
  • Cons: More complex, requires special server support
  • Use case: Real-time bidirectional communication (chat, gaming)

Server-Sent Events (SSE)​

  • Pros: Simple HTTP-based, automatic reconnection, event IDs
  • Cons: Unidirectional (server to client only)
  • Use case: Live updates, notifications, news feeds

Long Polling​

  • Pros: Works everywhere, simple
  • Cons: Higher overhead, more resource intensive
  • Use case: Fallback for older browsers

Community and Support​

GitHub Repository​

  • jquery-sse
    • Source code
    • Issue tracker
    • Pull requests welcome

NPM Package​

jsDelivr CDN​

License​

This project is licensed under the MIT License. See the LICENSE file for details.

Contributing​

Contributions are welcome! Please feel free to submit pull requests or open issues on GitHub.

Development Setup​

# Clone the repository
git clone https://github.com/byjg/jquery-sse.git

# Install dependencies (if any)
npm install

# Run examples
docker run -it --rm -p 8080:80 -v $PWD:/var/www/html byjg/php:7.4-fpm-nginx

Credits​

Created and maintained by João Gilberto Magalhães (JG)

Part of Open Source ByJG