How to Build a Real-Time Feature Without WebSockets Complexity

WebSockets are powerful but come with operational complexity. Here are simpler alternatives that work for most use cases.

Your Actual Options

1. Server-Sent Events (SSE)

One-way server-to-client streaming. Incredibly simple:

app.get('/events', (req, res) => {
  res.setHeader('Content-Type', 'text/event-stream');
  res.setHeader('Cache-Control', 'no-cache');

  const interval = setInterval(() => {
    res.write('data: { "time": "' + Date.now() + '" }

');
  }, 1000);

  req.on('close', () => clearInterval(interval));
});

Works in every browser, falls back gracefully, handles reconnection automatically.

2. Polling with Exponential Backoff

For low-frequency updates:

async function poll(url, onUpdate) {
  let delay = 1000;
  while (true) {
    try {
      const data = await fetch(url).then(r => r.json());
      onUpdate(data);
      delay = 1000;
    } catch (e) {
      delay = Math.min(delay * 2, 30000);
    }
    await new Promise(r => setTimeout(r, delay));
  }
}

3. Firebase Realtime Database / Supabase Realtime

Managed real-time infrastructure. More moving parts but handles scale.

When to Use Each

Use Case	Best Choice
Notifications, feeds	SSE
Chat (low volume)	SSE or Polling
Chat (high volume)	WebSockets
Live sports scores	SSE or WebSockets
Collaborative editing	WebSockets

The Unpopular Truth

You probably don't need WebSockets. SSE handles 95% of "real-time" use cases with a fraction of the complexity. For extension backends needing real-time features, ExtensionBooster's API tools support SSE out of the box.