Asynchronous JavaScript: Promises, Callbacks, Async Await (Udemy.com)

Everything about JavaScript Promises, Callback functions, Async Await, and Event Loop

( 126 Reviews )

Created by: Viktor Pyskunov

Produced in 2021

What you will learn

No fluff, direct and to the point
Learn fundamental concepts of Asynchronous JavaScript
Everything about JavaScript Promises
Callback functions: pros & cons, when to use and how to test
Async Await - the new way of handling asynchronous operations in JavaScript
Event Loop
How JavaScript engine executes code behind the scenes
Unit testing of asynchronous functions

Quality Score

Content Quality

Video Quality

Qualified Instructor

Course Pace

Course Depth & Coverage

Overall Score : 90 / 100

Course Description

My main goal is to help you understand and learn Asynchronous JavaScript. This course was specifically designed for those who want to improve their skills in Callbacks, Promises, Async Await, and Event Loop. This course was designed to be easy to understand, and therefore there are a lot of visuals in it, especially when we are talking about important concepts. You will also see a lot of coding examples along the way.
We will be talking about 3 main components of Async JavaScript: Callback functions, Promises, and Async Await.
Callbacks in JavaScript are used everywhere. Creating event handlers, making HTTP requests, interacting with the DOM, setting timeouts, reading or writing data to the filesystem, working with databases, etc. I am pretty sure you are already using callbacks in your code, but I am not sure if you know how they actually work... Knowing how things really work will help you write your code faster and avoid weird bugs.
Promises were created as a better alternative to callbacks. They don't have drawbacks that callbacks have. JavaScript promises are incredibly helpful when you have several asynchronous operations that depend on each other. However, promises are a new concept which you have to learn, and this course will help you with that.
Async Await is a syntactic sugar around Promises introduced in EcmaScript 8. Before that writing asynchronous code in JavaScript was very different from writing ordinary synchronous code. Async await allows you to structure all your code in a similar way, no matter if it's synchronous or asynchronous.
There is a lot of asynchronous stuff going on in popular JavaScript libraries and frameworks: React, Angular, Vue.js, jQuery, etc. In NodeJS it's almost impossible to write anything without using asynchronous operations. After watching this course you will be able to read and write asynchronous JavaScript code effectively, and you will definitely understand how it works behind the scenes!Who this course is for:

Developers with basic JavaScript knowledge
Those who want to master Asynchronous JavaScript, Callbacks, Promises, Async Await

Time: 3h

Instructor Details

Viktor Pyskunov

4.5 Rating
126 Reviews

My name is Viktor and my goal is to help you understand stuff.
I am a Senior Software Developer specializing in JavaScript and various technologies around it.
I have been creating web applications for 12 years.
During these years I acquired a lot of expertise in Software Development industry.
Now I want to share my knowledge with you.
I design my courses so they are easy to understand and to follow,
and I update them regularly in order to keep them up-to-date.

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Reviews

4.5

126 total reviews

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Write a Review

By Daevin Oey on 11/8/2020

I was always mystified by the event loop Viktor cleared everything up for concisely and clearly in just 6 minutes!

By Pramod N on 11/8/2020

Good one. Understood the concept very well.

By Erin O'Connor on 10/24/2020

As I sit here this morning, I realize that it is kind of nice to just have the phone in one hand and coffee and scones in the other. Plus, this instructor has made promises palatable.

By Chuck Todd on 10/19/2020

Excellent presentation of the materials. Provided numerous examples that helped to clarify the material.

By Quanfeng Lu on 10/18/2020

Yes. it is very good!

By Ns on 10/17/2020

Covered the topics well.

By Ben Beale on 10/14/2020

Easy to follow and digest content pertaining to a specific area of JavaScript that I've had trouble with. This one is getting bookmarked for quick reference down the road.

By Naga Dhulipudi on 10/14/2020

The most helpful course so far on Javascript Main Concept Promises & Async/Await.
The whole lifecycle of how they work behind the scenes was a challenge for me to read through documentations. Taking this course has levelled up my idea of them for sure. Its not scary anymore when I see these functions out there.

By Matt Jennings on 9/25/2020

Very good examples. It was easy to follow along and I appreciate the Node.js info too.

By Shivendra Pandey on 9/24/2020

this is really amazing for the beginners/moderate learners, who have used things but are not cleared with the concepts. Its amazing lecture who works as automation engineer and looking to understand the things conceptually.

By Dinesh Singh on 9/14/2020