What are callback functions in JavaScript?

Can you explain what callback functions are in JavaScript?

Sure! A callback function is a function that is passed as an argument to another function and is executed after some operation.

Can you give me an example of a callback function?

Of course! Here's a simple example:

function greet(name, callback) {
    console.log('Hello ' + name);
    callback();
}

function sayGoodbye() {
    console.log('Goodbye!');
}

greet('Alice', sayGoodbye);

What are some common use cases for callback functions?

Common use cases include handling asynchronous operations like API calls, event handling, and array methods like map and filter.

Are there any drawbacks to using callback functions?

Yes, one drawback is 'callback hell', which occurs when callbacks are nested too deeply, making the code hard to read and maintain.