How do event emitters compare to promises in JavaScript?

How do event emitters compare to promises in JavaScript?

Event emitters and promises are both used for handling asynchronous operations, but they serve different purposes. Event emitters are used to handle multiple events and can emit events multiple times, while promises represent a single value that may be available now, or in the future, or never.

Can you give me an example of when to use each?

Sure! Use event emitters when you need to handle multiple events, like user interactions or data streams. Use promises when you want to handle a single asynchronous operation, like fetching data from an API.

What are the advantages of using promises over event emitters?

Promises provide a cleaner and more manageable way to handle asynchronous code, especially with chaining and error handling. They also avoid callback hell, which can occur with event emitters.

Are there any scenarios where event emitters are preferred?

Yes, event emitters are preferred in scenarios where you need to listen for multiple events over time, such as in real-time applications or when dealing with streams of data.