What are the best practices for using EventEmitter in Node.js?

What are the best practices for using EventEmitter in Node.js?

Some best practices include: 1) Use meaningful event names, 2) Avoid memory leaks by removing listeners, 3) Use once() for one-time events.

Can you explain why it's important to remove listeners?

Removing listeners is crucial to prevent memory leaks, especially in long-running applications. It ensures that unused listeners don't hold references to objects that should be garbage collected.

What are some common mistakes developers make with EventEmitter?

Common mistakes include not removing listeners, using generic event names, and not handling errors properly in event handlers.

How can I test EventEmitter in my application?

You can use testing frameworks like Mocha or Jest to create unit tests for your EventEmitter instances, ensuring events are emitted and listeners respond correctly.