What are callbacks in JavaScript?

What are callbacks in JavaScript?

Callbacks are functions passed as arguments to other functions, executed after a certain event or condition.

Can you give me an example of a callback?

Sure! Here's a simple example:

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

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

greet('Alice', sayGoodbye);

What happens if I don't use a callback?

Without a callback, the code may not execute in the intended order, especially in asynchronous operations.

Are there any downsides to using callbacks?

Yes, using too many callbacks can lead to 'callback hell', making code harder to read and maintain.