Event Loop Phases

The event loop has distinct phases: timers, pending callbacks, poll, check, and close callbacks.

Overview

The event loop has distinct phases: timers, pending callbacks, poll, check, and close callbacks.

Code Example

setTimeout(() => console.log("Timer"), 0);\nsetImmediate(() => console.log("Immediate"));

Web Development Context

In modern web development, understanding Event Loop Phases 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.