Tutorial Does Async-Await Work in JavaScript

Async/await is sometimes referred to as “syntactic sugar” on top of Promises. But what does that really mean? The answer is actually pretty simple: async/await is really just promises under the hood but with a different (some would say simpler) syntax.

Let’s use a pretty common example of promises: fetching data.

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Tutorial Does Async-Await Work in JavaScript
Terry  Tremblay

Terry Tremblay

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Now Learn JavaScript Programming Language With Microsoft

icrosoft has released a new series of video tutorials on YouTube for novice programmers to get a hands-on renowned programming language — JavaScript.

This isn’t the first attempt by Microsoft to come up with video tutorials by beginner programmers. The company also has a series of YouTube tutorials on Python for beginners.

For JavaScript, Microsoft has launched a series of 51 videos as ‘Beginner’s Series to JavaScript,’ for young programmers, developers and coders who are interested in building browser applications using JavaScript. These video tutorials will also help programmers and coders to use relevant software development kits (SDKs) and JavaScript frameworks, such as Google’s Angular.


“Learning a new framework or development environment is made even more difficult when you don’t know the programming language,” stated on the Microsoft Developer channel on YouTube. “Fortunately, we’re here to help! We’ve created this series of videos to focus on the core concepts of JavaScript.”

It further stated — while the tutorials don’t cover every aspect of JavaScript, it indeed will help in building a foundation from which one can continue to grow. By the end of this series, Microsoft claims that the novice programmers will be able to work through tutorials, quick starts, books, and other resources, continuing to grow on their own.


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Ollie  Dietrich

Ollie Dietrich

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How Async/Await Works in Javascript

Async/await is a new way to write asynchronous code.  Async/await is actually just syntax sugar built on top of promises. It makes asynchronous code look and behaves a little more like synchronous code.

 

Thumb Rules for async-await:
1. `async` functions return a promise.
2. `await` pauses the code execution within the `async` function.
3. There can be multiple `await` statements within a single `async` function.
4. `await` only pauses the code execution within the `async` function. It makes sure that the next line is executed when the promise resolves.

 

⌚ Timestamps:
00:00 Introduction
00:58 Async
02:27 Await

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wp codevo

wp codevo

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JavaScript Shopping Cart - Javascript Project for Beginners

https://youtu.be/5B5Hn9VvrVs

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Javascript : Async Await in Javascript | Javascript Interview questions.

Explained in detail about

  • Async
  • Await
  • Fetching country data using Async & Await
  • How Async & Await better than promise

Dont miss to watch the video & ask your questions or doubts in comments

https://youtu.be/pJbsd2vAqdI

#javascript #async #await

Async/Await with forEach is BAD! | Javascript Tutorial

Attempting to use Async / Await with forEach is a bad idea. In this advance async/await Javascript tutorial, I'll show you why. You will learn how for, for...of, Promise.all(), and reduce all provide alternative solutions that are better than forEach.

Async Await with forEach is BAD! | Advanced Async/Await Javascript Tutorial

(00:00) Intro
(00:05) Welcome and Intro 
(00:22) forEach - What's it good for?
(02:34) Async fetch request example
(03:51) forEach with Async Await is BAD
(07:33) Alternative #1: traditional for loop
(09:39) Alternative #2: for...of loop
(10:39) Alternative #3: Promise.all with map
(14:01) Alternative #4: A different reduce

📚 References: 
MDN forEach: 
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach 
MDN for...of: 
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...of 
MDN PromiseAll: 
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/all 
MDN reduce: 
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reduce 

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