Eloquent JavaScript

second edition

This is a book about JavaScript, programming, and the wonders of the digital. You can read it online here, or get your own paperback copy of the book.

Written by Marijn Haverbeke.

Licensed under a Creative Commons attribution-noncommercial license. All code in this book may also be considered licensed under an MIT license.

Illustrations by various artists: Cover by Wasif Hyder. Computer (introduction) and unicycle people (Chapter 21) by Max Xiantu. Sea of bits (Chapter 1) and weresquirrel (Chapter 4) by Margarita Martínez and José Menor. Octopuses (Chapter 2 and 4) by Jim Tierney. Object with on/off switch (Chapter 6) by Dyle MacGregor. Regular expression diagrams in Chapter 9 generated with regexper.com by Jeff Avallone. Game concept for Chapter 15 by Thomas Palef. Pixel art in Chapter 16 by Antonio Perdomo Pastor.

The second edition was made possible by 454 financial backers, with significant contributions from , , and .

Contents

1. 1Introduction
2. 2

   (Part 1: Language)

   Values, Types, and Operators
3. 3Program Structure
4. 4Functions
5. 5Data Structures: Objects and Arrays
6. 6Higher-order Functions
7. 7The Secret Life of Objects
8. 8Project: Electronic Life
9. 9Bugs and Error Handling
10. 10Regular Expressions
11. 11Modules
12. 12Project: A Programming Language
13. 13

    (Part 2: Browser)

    JavaScript and the Browser
14. 14The Document Object Model
15. 15Handling Events
16. 16Project: A Platform Game
17. 17Drawing on Canvas
18. 18HTTP
19. 19Forms and Form Fields
20. 20Project: A Paint Program
21. 21

    (Part 3: Node)

    Node.js
22. 22Project: Skill-Sharing Website

Other pages

A paper version of Eloquent JavaScript, including a bonus chapter, is being brought out by No Starch Press. They also sell an ebook version more polished than the files linked below.

• Code sandbox and exercise solutions
• Errata for the paper book
• This book as a single PDF file (& small version for mobile)
• This book as an EPUB file
• The first edition of the book