Fix ConnectionError Error in TypeScript

What Is the ConnectionError Error?

Running into ConnectionError while working with TypeScript? This guide walks you through the root cause and a clean solution.

Why It Happens

This error indicates a failed network connection — typically caused by incorrect URLs, DNS issues, or the server being unreachable.

The Fix

async function fetchWithRetry(url, retries = 3) {
  for (let i = 0; i < retries; i++) {
    try {
      return await fetch(url);
    } catch (err) {
      if (i === retries - 1) throw err;
      await new Promise(r => setTimeout(r, 1000 * (i + 1)));
    }
  }
}

When This Error Appears in Production

If you encounter ConnectionError in a live TypeScript application, the first priority is understanding the blast radius — how many users are affected? Check your error monitoring dashboard for frequency and patterns. Often, this error correlates with specific user actions, browsers, or network conditions. Implementing graceful degradation ensures your application remains usable even when this error occurs. Consider adding a retry mechanism with exponential backoff for transient failures.

Prevention

[Bugsly](https://bugsly.dev) makes tracking errors like this effortless — real-time notifications with complete stack traces.

Key Takeaways

• Always handle this error gracefully with proper error handling
• Check your environment configuration
• Test thoroughly before deploying to production