You-Dont-Know-JS README

The project's README from github.com/getify/You-Dont-Know-JS. As one markdown file: README.md.

You Don't Know JS Yet (book series) - 2nd Edition

This is a series of books diving deep into the core mechanisms of the JavaScript language. This is the second edition of the book series:

     

To read more about the motivations and perspective behind this book series, check out the Preface.

If you're looking for the previous first edition books, they can be found here.

Titles

I recommend reading the second edition books in this order:

If you're looking for the previous first edition books, they can be found here.

Publishing

As always, you'll be able to read these books online here entirely for free.

This edition of the books is being self-published through GetiPub publishing. The published books will be made available for sale through normal book retail sources.

If you'd like to contribute financially towards the effort (or any of my other OSS efforts) aside from purchasing the published books, please consider these options:

Contributions

This book series is now complete, and is not open to further contributions.

Thank you to those who've been part of the 11 years journey of this book series.

Thank You To These Wonderful Sponsors

Frontend Masters Logo (dark)

Frontend Masters Logo (light)

The first two books of the second edition are exclusively sponsored by Frontend Masters.

Frontend Masters is the gold standard for top-of-the-line expert training material in frontend-oriented software development. With over 150 courses on all things frontend, this should be your first and only stop for quality video training on HTML, CSS, JS, and related technologies.

Note: I teach all my workshops exclusively through Frontend Masters. If you like this book content, please check out my video training courses.

I want to extend a warm and deep thanks to Marc Grabanski and the entire Frontend Masters team, not only for their excellent work with the video training platform, but for their unwavering support of me and of the "You Don't Know JS" books!

The materials herein are all © 2019-2025 Kyle Simpson.

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 Unported License.

You-Dont-Know-JS (getify/You-Dont-Know-JS)

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184.8K ·GitHub
You-Dont-Know-JS
What is this?A free, open-source book series by Kyle Simpson that dives deep into the core mechanisms of the JavaScript language, covering topics like scope, closures, types, and objects.
Is this one book or a series?It's a series of multiple titles under a second edition, including 'Get Started', 'Scope & Closures', and an 'Unbooks' collection with drafts like 'Objects & Classes' and 'Types & Grammar'.
Where should I start reading?Start with 'Get Started', then 'Scope & Closures', followed by the 'Unbooks' ebook; all can be read online for free via the repo.
Do I need to buy the books to read them?No, you can read them online for free; buying on Leanpub or Amazon is optional if you want to support the author.
Is the whole series finished?No, some planned titles like 'Sync & Async' and 'ES.Next & Beyond' were canceled, and others like 'Objects & Classes' and 'Types & Grammar' remain in draft form; the series is now closed to further contributions.
Is there a first edition too?Yes, the previous first edition books are still available and linked from the repo for those who prefer them.
What are similar projects?Learn-Vim, Functional-Light-JS, node-lessons, hello-algo, rust-course, zh.javascript.info, react-native-guide, build-web-application-with-golang
Which topics is it in?training-materials, es2015, learn-to-code, es6, async, programming, book, beginner-friendly, learning, tutorial, education, free
Creator
getify
Size
14.9 MB
Stars
184.8K
Updated
CommitJan 18
Age
12y
Commits · 90 Days