Node.js EventEmitter

Implement event-driven asynchronous architectures with the events module.

❮ Previous Next ❯

Much of the Node.js core API is built around an idiomatic asynchronous event-driven architecture in which certain kinds of objects (called "emitters") emit named events that cause Function objects ("listeners") to be called.

Key Takeaways: Node.js EventEmitter

Mastering Node.js EventEmitter helps you write clean and reliable Node.js code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.

Node.js EventEmitter Code Example

Node.js

const EventEmitter = require("events");
const myEmitter = new EventEmitter();

myEmitter.on("userSignup", (username) => {
  console.log(`Welcome email triggered for: ${username}`);
});

myEmitter.emit("userSignup", "fatima_dev");

Output

Welcome email triggered for: fatima_dev

Run this example on your own computer. The "Get Started" lesson shows how to set it up.

Finished this lesson?

Mark it complete to track your progress.

❮ Previous

Node.js REST API Project

Next ❯

Node.js Streams and Buffers

Stuck on something?

Ask the community in the CodesInTech forum.

Need a developer?

Learning on your own is great — and when you need professional help, our team builds custom software, websites and mobile apps for clients worldwide.

Explore Our Services

Node.js EventEmitter

💡 Key Takeaways: Node.js EventEmitter

Node.js EventEmitter Code Example

Key Takeaways: Node.js EventEmitter