What are advanced callbacks in JavaScript?

What are advanced callbacks in JavaScript?

Advanced callbacks in JavaScript refer to functions that are passed as arguments to other functions, allowing for asynchronous operations and more complex control flows.

Can you give me an example of using callbacks in a real-world scenario?

Sure! A common example is using callbacks with the setTimeout function to delay execution of code. For instance, you can pass a function to setTimeout that logs a message after a specified delay.

What are the potential issues with using callbacks?

One major issue is 'callback hell', where callbacks are nested within callbacks, making the code hard to read and maintain. Promises and async/await are often used to mitigate this.

How do promises improve upon callbacks?

Promises provide a cleaner way to handle asynchronous operations by allowing chaining and better error handling, avoiding deeply nested structures.