Asynchronous JavaScript & EVENT LOOP from scratch 🔥

In-depth explanation of Event Loop, Web APIs, MicroTask Callback Queue, and how JavaScript works asynchronously in the web browser. Understand how setTimeout works behind the scenes along with fetch and event listeners.

You’ll also find a lot of code examples along with a deep-dive explanation of the web APIs and how JavaScript code is executed asynchronously.

The only request is to watch this Episode of Namaste JavaScript with full attention. 🙏

It took a lot of effort to create this video, do comment down and let me know if you find it helpful.

  • 00:00 - Introduction
  • 00:40 - How JS Engine Executes the Code using Call Stack
  • 03:25 - Main Job of the Call Stack
  • 03:51 - How does JavaScript perform async tasks
  • 04:36 - Behind the Scenes in Browser
  • 07:35 - Web APIs in JS
  • 12:03 - How setTimeout Works behind the scenes in Browsers
  • 16:09 - Event Loop & CallBack Queue in JS
  • 18:59 - How Event Listeners Work in JS
  • 23:43 - More about Event Loop
  • 25:02 - Why do we need Event Loop
  • 27:29 - How fetch() function works
  • 30:26 - MicroTask Queue in JS
  • 36:01 - What are MicroTasks in JS?
  • 38:35 - Starvation of Functions in Callback Queue
  • 39:48 - Teaser of the Next Video
  • 40:53 - Thank you for watching Namaste JavaScript 🙏

#javascript #programming #developer #web-development

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Asynchronous JavaScript & EVENT LOOP from scratch 🔥
Lowa Alice

Lowa Alice


JavaScript Loops Tutorial

JavaScript loops made simple.

📺 The video in this post was made by Programming with Mosh
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Thanks for visiting and watching! Please don’t forget to leave a like, comment and share!

#javascript #loops #javascript loops #javascript loops tutorial

Dexter  Goodwin

Dexter Goodwin


The Event Loop Concept and Asynchronous Development in JavaScript

avaScript is easy when all you need is a simple working interface. The problems begin when the interface becomes more complex. Here you need to have a deeper understanding of JavaScript. It is important that even a large and  complex interface remains fast and responsive. Responsiveness is usually achieved through the use of asynchronous functions. This means that you can let your code do several things at the same time without stopping or blocking the main thread.

In this article, I will try to tell you as simply as possible about the work of asynchronous in JavaScript. At all interviews in my life, I have been always asked this question. When you start learning JS, it can seem daunting but in reality, everything is much simpler.

How does the Event Loop work?

Event Loop is one of those things that every JavaScript developer encounters in one way or another. JavaScript provides a concurrency model based on an event loop, which executes the code, collecting and processing events, and performs queued sub-tasks.

Let’s look at an example of a set timeout:

I think it’s not difficult to guess what sequence these logs will be called in. Let’s check.

#event-loop #javascript #js #asynchronous

Rahul Jangid


What is JavaScript - Stackfindover - Blog

Who invented JavaScript, how it works, as we have given information about Programming language in our previous article ( What is PHP ), but today we will talk about what is JavaScript, why JavaScript is used The Answers to all such questions and much other information about JavaScript, you are going to get here today. Hope this information will work for you.

Who invented JavaScript?

JavaScript language was invented by Brendan Eich in 1995. JavaScript is inspired by Java Programming Language. The first name of JavaScript was Mocha which was named by Marc Andreessen, Marc Andreessen is the founder of Netscape and in the same year Mocha was renamed LiveScript, and later in December 1995, it was renamed JavaScript which is still in trend.

What is JavaScript?

JavaScript is a client-side scripting language used with HTML (Hypertext Markup Language). JavaScript is an Interpreted / Oriented language called JS in programming language JavaScript code can be run on any normal web browser. To run the code of JavaScript, we have to enable JavaScript of Web Browser. But some web browsers already have JavaScript enabled.

Today almost all websites are using it as web technology, mind is that there is maximum scope in JavaScript in the coming time, so if you want to become a programmer, then you can be very beneficial to learn JavaScript.

JavaScript Hello World Program

In JavaScript, ‘document.write‘ is used to represent a string on a browser.

<script type="text/javascript">
	document.write("Hello World!");

How to comment JavaScript code?

  • For single line comment in JavaScript we have to use // (double slashes)
  • For multiple line comments we have to use / * – – * /
<script type="text/javascript">

//single line comment

/* document.write("Hello"); */


Advantages and Disadvantages of JavaScript

#javascript #javascript code #javascript hello world #what is javascript #who invented javascript

Peyton  Ullrich

Peyton Ullrich


Easiest Series For Learning Javascript - Javascript Events - Video 15

Read more about javascript events here -

#javascript #learning javascript #javascript events

studio52 dubai

studio52 dubai


7 Tips for a Successful Live Event Coverage - Studio 52

Live events have been a growing trend in the events industry this past year, offering many businesses a much-needed lifeline. Read on for our simple tips to planning your virtual event

#event coverage services #event photography #event video production #event videography #event coverage services #event photography