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Practical Prototype and
script.aculo.us
Andrew Dupont
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Practical Prototype and script.aculo.us
Copyright © 2008 by Andrew Dupont
All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means,
electronic or mechanical, including photocopying, recording, or by any information storage or retrieval
system, without the prior written permission of the copyright owner and the publisher.
ISBN-13 (pbk): 978-1-59059-919-8
ISBN-10 (pbk): 1-59059-919-5
ISBN-13 (electronic): 978-1-4302-0502-9
Printed and bound in the United States of America 9 8 7 6 5 4 3 2 1
Trademarked names may appear in this book. Rather than use a trademark symbol with every occurrence
of a trademarked name, we use the names only in an editorial fashion and to the benefit of the trademark
owner, with no intention of infringement of the trademark.
Lead Editors: Clay Andres, Tony Campbell, Jason Gilmore, Chris Mills
Technical Reviewer: Aaron Gustafson
Editorial Board: Clay Andres, Steve Anglin, Ewan Buckingham, Tony Campbell, Gary Cornell,
Jonathan Gennick, Matthew Moodie, Joseph Ottinger, Jeffrey Pepper, Frank Pohlmann,
Ben Renow-Clarke, Dominic Shakeshaft, Matt Wade, Tom Welsh
Project Manager: Beth Christmas
Copy Editor: Damon Larson
Associate Production Director: Kari Brooks-Copony
Production Editor: Laura Esterman
Compositor: Linda Weidemann, Wolf Creek Press
Proofreader: Erin Poe
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Artist: April Milne
Cover Designer: Kurt Krames
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Contents at a Glance
About the Author .................................................................xiii
About the Technical Reviewer ......................................................xv
Acknowledgments ...............................................................xvii
Introduction .....................................................................xix
PART 1 ■■■ Prototype
■ CHAPTER 1
What You Should Know About Prototype, JavaScript,
and the DOM ...................................................3
■ CHAPTER 2
Prototype Basics ..............................................17
■ CHAPTER 3
Collections (Or, Never Write a for Loop Again) ..................31
■ CHAPTER 4
Ajax: Advanced Client/Server Communication ..................49
■ CHAPTER 5
Events ........................................................91
■ CHAPTER 6
Working with the DOM ........................................113
■ CHAPTER 7
Advanced JavaScript: Functional Programming
and Class-Based OOP .........................................139
■ CHAPTER 8
Other Helpful Things: Useful Methods on Built-Ins .............167
PART 2 ■■■ script.aculo.us
■ CHAPTER 9 What You Should Know About DHTML and script.aculo.us ......193
■ CHAPTER 10 Introduction to script.aculo.us Effects .........................215
■ CHAPTER 11 Enabling Draggables, Droppables, and Sortables ..............257
■ CHAPTER 12 Advanced Controls: Autocompleters, In-Place Editors,
and Sliders ...................................................277
■ CHAPTER 13 Prototype As a Platform .......................................297
■ INDEX .......................................................................315
iii
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Contents
About the Author .................................................................xiii
About the Technical Reviewer ......................................................xv
Acknowledgments ...............................................................xvii
Introduction .....................................................................xix
PART 1 ■■■ Prototype
■ CHAPTER 1 What You Should Know About Prototype,
JavaScript, and the DOM ....................................3
About JavaScript .................................................3
Everything Is an Object .......................................4
About the DOM ...................................................8
It’s Hard to Write Multiplatform JavaScript ......................8
It’s Hard to Debug Multiplatform JavaScript .....................9
About This Book ..................................................9
Firefox Is Used for Nearly All Examples .........................9
First Theory, Then Practice ..................................10
About Prototype .................................................10
Prototype’s Philosophy ......................................10
Prototype’s Purpose and Scope ..............................11
Prototype’s Web Site ........................................11
Contributing to Prototype ....................................11
Getting Started with Prototype ................................12
Summary ......................................................16
v
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