Eloquent JavaScript
learn how to code in JavaScript

Hot Sky
435 pages
English
Hot Sky
435 pages
English
296
/ 435
Eloquent JavaScript
4th edition
Marijn Haverbeke
Copyright © 2024 by Marijn Haverbeke
This work is licensed under a Creative Commons attribution-noncommercial
license (http://creativecommons.org/licenses/by-nc/3.0/). All code in the
book may also be considered licensed under an MIT license (https://eloquentjavascript.
net/code/LICENSE).
The illustrations are contributed by various artists: Cover by Péchane Sumi-
e. Chapter illustrations by Madalina Tantareanu. Pixel art in Chapters 7 and
16 by Antonio Perdomo Pastor. Regular expression diagrams in Chapter 9
generated with regexper.com by Jeff Avallone. Game concept for Chapter 16
by Thomas Palef.
You can buy a print version of this book, with an extra bonus chapter included,
printed by No Starch Press at http://a-fwd.com/com=marijhaver-20&asin-
com=1593279507.
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Figures

Executing a function is called
The example dataset contains some pieces of information about the 140
graph
The tags, wrapped in angle brackets (
Eloquent JavaScript — convert the collection to a real array by calling
Our picture is centered on the page and given a
Note that the
The window object will receive
The dark box represents the player, whose task is to collect the yellow boxes
The
These tags create DOM elements, just like HTML tags, that scripts can
Just like in HTML (and SVG), the coordinate system that the canvas uses
When no
When filling a path (using the
You could also use the
We draw a quadratic curve from the left to the right, with (60, 10) as the
Such curves can be hard to work with—it’s not always clear how to find the
Eloquent JavaScript — The two control points specify the direction at both ends of the curve. The
But a chart that doesn’t tell us what the slices mean isn’t very helpful. We
If the calls to
Choosing a graphics interface
When drawing the last two shapes, you may want to refer to the explanation
The JavaScript interface for such elements differs with the type of the ele-
Painting on a computer is great. You don’t need to worry about materials,
This control creates such a field and wires it up to stay synchronized with
The application will be set up to show a

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