Can someone explain withhow CallBack function works?

[taahamushtaq]

Willing to learn how CallBack function works. Please help with an small example and explanation of CALLBACK function. Also please help for explanation without getReference.

[newhand · Accepted solution]

@taahamushtaq 

answer from  chatGPT 😀

In JavaScript, a callback function is a function that is passed as a parameter to another function and is executed after the parent function has completed its operation. The purpose of using a callback function is to ensure that a specific piece of code is executed only after a certain operation has completed.

Here is a simple example of a callback function:

function greet(name, callback) {
  console.log(`Hello, ${name}!`);
  callback();
}

function sayBye() {
  console.log("Goodbye!");
}

greet("John", sayBye);

In this example, the greet function takes two parameters: a name parameter and a callback parameter. The greet function logs a greeting to the console and then calls the callback function.

In this case, the callback function is sayBye. So when we call greet("John", sayBye), the greet function logs "Hello, John!" to the console, and then calls the sayBye function, which logs "Goodbye!" to the console.

So the output of this code will be:

Hello, John!
Goodbye!