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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 of Eloquent JavaScript was made possible by 454 financial backers .

A paper version of Eloquent JavaScript, including a bonus chapter, is being brought out by No Starch Press . They also sell a more polished EPUB version that includes the bonus chapter.

This is a book about getting computers to do what you want them to do. Computers are about as common as screwdrivers today, but they contain a lot more hidden complexity and thus are harder to operate and understand. To many, they remain alien, slightly threatening things.