Middleware Concepts

Functions that execute sequentially during an HTTP request cycle.

Overview

Functions that execute sequentially during an HTTP request cycle.

Code Example

function logger(req, res, next) {\n  console.log(req.method, req.url);\n  next();\n}

Web Development Context

In modern web development, understanding Middleware Concepts 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.