What are the best practices for using callbacks and promises in JavaScript?

What are the best practices for using callbacks and promises in JavaScript?

When using callbacks, ensure they are not nested too deeply to avoid callback hell. For promises, always return them and use .catch() for error handling.

Can you explain what callback hell is?

Callback hell refers to the situation where callbacks are nested within other callbacks, making the code hard to read and maintain.

How do promises help with callback hell?

Promises flatten the structure of asynchronous code, allowing you to chain operations and handle errors more gracefully.

What are some common mistakes to avoid with promises?

Common mistakes include not returning promises, forgetting to handle errors, and mixing callbacks with promises.