The Event Loop Explained: A Comprehensive Guide to Asynchronous JavaScript

Photo by Rahul Mishra on Unsplash

This is the second article of a series I’m publishing about the basic JavaScript concepts I think every developer should understand. In this time and age of software programming, I feel like the main focus is staying up to date with new technologies and learning the top layer to be able to write working code, but the main and basic principles and how the technologies we use actually work under the hood is often times overlooked. So with these articles, I plan to explain some of these concepts, hopefully in an easy way, so we can have a deeper understanding of how our code truly works.

Here’s the first article of this series about DOM events:

Understanding DOM Events: A Guide to Event Handling with JavaScript

Now, let’s get to business,

What is Event Loop in JavaScript?

The event loop is a mechanism in JavaScript responsible for managing asynchronous tasks, such as fetching data from a server or waiting for user input. JavaScript is a single-threaded language, which means it can only execute one piece of code at a time…