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 Mozilla, Hack

  Reactor, and Ghostery.

Contents

Introduction

(Part 1: Language)Values, Types, and Operators

Program Structure

Functions

Data Structures: Objects and Arrays

Higher-order Functions

The Secret Life of Objects

Project: Electronic Life

Bugs and Error Handling

Regular Expressions

Modules

Project: A Programming Language

(Part 2: Browser)JavaScript and the Browser

The Document Object Model

Handling Events

Project: A Platform Game

Drawing on Canvas

HTTP

Forms and Form Fields

Project: A Paint Program

(Part 3: Node)Node.js

Project: 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

This book as a MOBI (Kindle) file

The first edition of the book

Translations