![]() You shouldn’t ever uninitialize a constant. ![]() OK, I understand that a constant always has the same value, but if that’s the case then how can it be uninitialized? The two constants, TAXRATE and DONUTPRICE, aren’t initialized, which means the calculations that depend on them can’t be completed. Write down what you think went wrong with Duncan’s just-intime donut script code. Real live interactivity requires a bit more smarts and a little more work. Sure, you can submit a form and maybe do a trick here and there with some crafty HTML and CSS coding, but you’re really just playing Weekend at Bernie’s propping up a lifeless web page. And neither is the Web without a little help from JavaScript. The interactive web Reacting to the Virtual World Tired of thinking of the Web in terms of passive pages? Been there, done that. Your brain’s saying, “Better leave room for more important things, like which wild animals to avoid and whether naked water skiing is a bad idea.” So how do you trick your brain into thinking that your life really depends on learning JavaScript? You’re sitting around trying to learn something, but your brain keeps telling you all that learning isn’t important. Table of Contents (the real thing) Intro Your brain on JavaScript. Wrangling the page: Slicing and Dicing HTML with the DOMīringing data to life: Objects as FrankendataĬreating custom objects: Having It Your Way with Custom Objectsĭynamic data: Touchy-Feely Web Applications The interactive web: Reacting to the Virtual Worldĭecision making: If There’s a Fork in the Road, Take Itįorms and validation: Getting the User to Tell All This book uses RepKover™, a durable and flexible lay-flat binding. No rocks, stick figures, cube puzzles, or macho moviegoers were harmed in the making of this book. While every precaution has been taken in the preparation of this book, the publisher and the author assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein. Where those designations appear in this book, and O’Reilly Media, Inc., was aware of a trademark claim, the designations have been printed in caps or initial caps. Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Cheaper by the dozen script pdf series#The Head First series designations, Head First JavaScript, and related trade dress are trademarks of O’Reilly Media, Inc. The O’Reilly logo is a registered trademark of O’Reilly Media, Inc. Cheaper by the dozen script pdf how to#My family knows how to celebrate a book release. Printing History: December 2007: First Edition. Masheed Morrison (wife), family, and pet fish For more information, contact our corporate/institutional sales department: (800) 998-9938 or ![]() ![]() Online editions are also available for most titles (). O’Reilly Media books may be purchased for educational, business, or sales promotional use. Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebastopol, CA 95472. Head First JavaScript by Michael Morrison Copyright © 2008 O’Reilly Media, Inc. ![]()
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