What are the differences between callbacks and promises?

Can you explain the differences between callbacks and promises in JavaScript?

Sure! Callbacks are functions passed as arguments to other functions, executed after a task is completed. Promises, on the other hand, are objects that represent the eventual completion (or failure) of an asynchronous operation and its resulting value.

What are the advantages of using promises over callbacks?

Promises provide better error handling and avoid callback hell, making the code cleaner and easier to read. They also allow chaining of asynchronous operations.

Can you give me an example of a callback and a promise?

Absolutely! A callback example would be using setTimeout to execute a function after a delay. A promise example would be fetching data from an API using fetch(), which returns a promise that resolves with the response.

When should I use callbacks instead of promises?

Callbacks can be useful for simple tasks or when working with older codebases that don't support promises. However, for more complex asynchronous operations, promises are generally preferred.