Callback vs Promises vs Async Await

Callback vs Promises vs Async Await

Learn fundamental concepts that JavaScript relies on to handle asynchronous operations. These concept includes Callbacks, Promises and the use of Async and Await to handle deferred operations.

Learn fundamental concepts that JavaScript relies on to handle asynchronous operations. These concept includes Callbacks, Promises and the use of Async and Await to handle deferred operations.

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javascript callback asyncwait promises

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What is Callback-Function in JavaScript? How it is Replaced By Promises?

Let us understand term Callback by an real-world example: Suppose, you are calling to your Girlfriend (If you have) and she is busy in another call then she send message to you : “I am busy right now, Call back you later.!!”. After completing her work, she calls you back and this is what call back in JavaScript as well. In this post, we'll discuss What is Callback-Function in JavaScript? How it is Replaced By Promises?

JavaScript Promise: Methods Comparison

What are promises and what is the difference between Promise.all, Promise.allSettled, Promise.race and Promise.any?

Intro to Callback in JavaScript

Foundation of callback function and use cases in JavaScript. In JavaScript, functions are objects, which means, like any other objects it can be assigned to a variable and passed as an argument to another function. In a nutshell, a callback function is _a function_ that is provided as a _parameter_ for other methods such as forEach method or addEventListener method and gets invoked at a certain point in time.

A Gentle Introduction to JavaScript Promises. I Promise :).

Promises are a fairly new API in JavaScript so we will first look at how asynchronous operations were done before promises. The most common way was to pass in callback functions that were called and ran after the success or failure of the asynchronous function.

Promise.allSettled() vs Promise.all()

Promise.allSetlled() is recently introduced in ECMA 2020. Check out how it is different from Promise.all().What is the difference between Promise.all() and Promise.allSetlled() ?