Exit Codes

Use process.exit() to terminate the process and return a status code to the OS.

Overview

Use process.exit() to terminate the process and return a status code to the OS.

Code Example

if (errorOccurred) {\n  console.error("Fatal error!");\n  process.exit(1); // 1 = failure, 0 = success\n}

Web Development Context

In modern web development, understanding Exit Codes 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.