EventEmitter

Decouple different parts of your application using publish-subscribe patterns.

Overview

Decouple different parts of your application using publish-subscribe patterns.

Code Example

import { EventEmitter } from "node:events";\nconst bus = new EventEmitter();\nbus.on("userCreated", user => sendWelcomeEmail(user));\nbus.emit("userCreated", { name: "Alice" });

Web Development Context

In modern web development, understanding EventEmitter 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.