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JavaScript Under The Hood

Learn about advanced JavaScript and how it works under the hood

1 hours+ of total content
11 ratings
990 students enrolled
Course Creator: Brad Traversy

Heads up!

This is an official course from Full Stack Web Developer Learning Path learning path.


  • Thread and Call Stack
  • Execution Context in JavaScript
  • Memory overview
  • JavaScript Engine
  • Async JS features
  • Task Queues
  • Event loops


JavaScript is a scripting language that uses high-level features of the C language and other languages such as Scheme, Perl, Ruby, Python and more. It was designed by Brendan Eich, who also created the Web browser Firefox.

This course will go in depth on how JavaScript works and how it advanced things like queues, call stack, async JS to name a few are used. You will learn about the following things in this course:

  • How thread and call stack work in JavaScript
  • What is execution context in JavaScript
  • How does JS work with memory
  • What are different kinds of JavaScript engines
  • What are some async JS features
  • Event loop working and how task queues work

Course Structure

10 lectures 01:16:38 total duration

  Execution Thread And Call Stack (Watch video)
  Execution Context (Watch video)
  Fix this code (Practice concept)
  Async JS, Task Queue, Event Loop (Watch video)
  Quiz Question (Attempt quiz)
  Convert to async JS (Practice concept)

Student feedback

Course Rating







profile pic for maxx
Nov 20, 2022
amazing course
profile pic for Rahul S. Poudel
Nov 19, 2022
Nice overall coverage of core topics. Thank you, Brad.
profile pic for md sazzad alam
Nov 16, 2022
Lot to learn about JS
profile pic for swapnil
Nov 15, 2022
Please add more videos about ASYNC operation under the hood and also more course about React and projects.
profile pic for Ashim Ghimire
Nov 15, 2022
Learned a lot about the inner working of JavaScript

Your Course Instructor

Course Instructor Image

Brad Traversy

Online Coding Educator

Online coding educator and content creator

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