API Error Handling

Return appropriate 4xx and 5xx status codes for failures.

Overview

Return appropriate 4xx and 5xx status codes for failures.

Code Example

if (!req.body.name) {\n  res.writeHead(400);\n  return res.end(JSON.stringify({ error: "Name required" }));\n}

Web Development Context

In modern web development, understanding API Error Handling is crucial. Node.js is widely used for building APIs, real-time applications, and microservices. Mastery of this concept allows you to build efficient, scalable, and secure backend systems.

Common Mistakes

• Blocking the event loop with heavy synchronous tasks.
• Exposing secrets in code instead of environment variables.
• Forgetting to handle promise rejections.

Next Steps

To solidify your understanding, review the related references and try out the practice challenges.