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title: How JavaScript Works behind the scenes? | daily.dev
description: How JavaScript Works behind the scenes? An overview walk-through of all the core components that are involved in the execution of JavaScript code. The Call...
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# How JavaScript Works behind the scenes?

**[Dev Genius](https://daily.dev/sources/devgenius)** · [@fixslyr](https://daily.dev/fixslyr) · 4 min read · 180 upvotes · 22 comments

## Summary

How JavaScript Works behind the scenes? An overview walk-through of all the core components that are involved in the execution of JavaScript code. The Call Stack Concurrency and Event Loop. What happens when you have function calls in the Call Stack that take a huge amount of time to be processed in the browser.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://blog.devgenius.io/how-javascript-works-behind-the-scenes-88c546173f32>

## Community discussion

Top comments from developers on daily.dev.

**@fixslyr** · 2 upvotes

> Read the second part here
> https://blog.devgenius.io/how-javascript-works-inside-the-javascript-engine-9fdbf3d24926

**@yardan\_dev** · 2 upvotes

> More than just writing code, now I know what's going on behind the scenes 🤩

**@techgeezer** · 1 upvotes

> The guy I report to now claims "oh it's just javascript!"  I wish he would read this and see how stupid that comment is.

**@lorezz** · 1 upvotes

> Well done, ty

**@jdcontrerasalbu** · 1 upvotes

> Great read. To the point, good examples, and nicely laid out.

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---

Tags: [#general-programming](https://daily.dev/tags/general-programming), [#javascript](https://daily.dev/tags/javascript)

[View this post on daily.dev](https://daily.dev/posts/how-javascript-works-behind-the-scenes--gbwe8g4v6)

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