CommonJS (require)

The legacy module system in Node.js.

Overview

The legacy module system in Node.js.

Code Example

const fs = require("fs");\nmodule.exports = { greet: () => "Hi" };

Web Development Context

In modern web development, understanding CommonJS (require) 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.