What do you understand by Callback and Callback hell in JavaScript?ES6 interview questions for freshers/ES6 Interview Questions and Answers for Freshers & Experienced

What do you understand by Callback and Callback hell in JavaScript?

Callback: It is used to handle the execution of function after the completion of the execution of another function. A callback would be helpful in working with events. In the callback, a function can be passed as an argument to another function. It is a great way when we are dealing with basic cases such as minimal asynchronous operations.

Callback hell: When we develop a web application that includes a lot of code, then working with callback is messy. This excessive Callback nesting is often referred to as Callback hell.

Posted Date:- 2021-10-08 09:18:00

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