Instant jQuery Selectors

By Aurelio De Rosa

Filled with practical, step-by-step instructions and clear explanations for the most important and useful tasks. Instant jQuery Selectors follows a simple how-to format with recipes aimed at making you well versed with the wide range of selectors that jQuery has to offer through a myriad of examples. Instant jQuery Selectors is for web developers who want to delve into jQuery from its very starting point: selectors. Even if you're already familiar with the framework and its selectors, you could find several tips and tricks that you aren't aware of, especially about performance and how jQuery acts behind the scenes.

• Language: English
• Publisher: Packt Publishing
• Release date: Aug 26, 2013
• ISBN: 9781783282227

Aurelio De Rosa

Aurelio De Rosa is a full-stack web and app developer who develops jQuery plugins and contributes to various open source projects including the jQuery API documentation.

Book preview

Table of Contents

Instant JQuery Selectors

Credits

About the Author

About the Reviewer

www.PacktPub.com

Support files, eBooks, discount offers and more

Why Subscribe?

Free Access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

1. Instant jQuery Selectors

Setting up jQuery (Must know)

Getting ready

How to do it...

There's more...

What version to use?

Compressed or not?

Using a CDN

The All selector (Must know)

How to do it...

How it works...

There's more...

Alternatives to $(document).ready()

Avoiding $(document).ready()

css() and browsers support

Selectors and browsers support

Performance

Selecting by ID (Must know)

How to do it...

How it works...

There's more...

Escaping special characters

Storing a collection

Selecting by class (Must know)

How to do it...

How it works...

There's more...

getElementsByClassName()

Selecting elements having two or more classes

Selecting by tag (Must know)

How to do it...

How it works...

There's more...

Selecting and using tag names with classes and IDs

getElementsByTagName()

Multiple selectors at once (Should know)

How to do it...

How it works...

Selecting by hierarchy (Must know)

Getting ready

How to do it...

How it works...

Selecting by attributes (Should know)

Getting ready

How to do it...

How it works...

There's more...

Multiple attribute selector

Not equal selector

Using filter() and attr()

Selecting by position using filters (Should know)

Getting ready

How to do it...

How it works...

Selecting from elements using filters (Should know)

Getting ready

How to do it...

How it works...

Child filters (Should know)

Getting ready

How to do it...

How it works...

Other filters (Become an expert)

Getting ready

How to do it...

How it works...

Custom filters (Become an expert)

How to do it...

How it works...

Context matters (Should know)

How to do it...

How it works...

There's more...

Improving performance re-using selected elements (Become an expert)

How to do it...

How it works...

Methods to filter collections (Become an expert)

Getting ready

How to do it...

How it works...

Traversing DOM SubTrees (Become an expert)

Getting ready

How to do it...

How to do it...

How to have efficient selectors (Become an expert)

How to do it...

Instant jQuery Selectors

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Instant JQuery Selectors

Copyright © 2013 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: August 2013

Production Reference: 1230813

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham B3 2PB, UK.

ISBN 978-1-78328-221-0

www.packtpub.com

Credits

Author

Aurelio De Rosa

Reviewers

Kent C. Dodds

Acquisition Editor

Nikhil Karkal

Mary Jasmine Nadar

Commissioning Editor

Nikhil Chinnari

Technical Editor

Dipika Gaonkar

Project Coordinator

Esha Thakker

Proofreader

Joel T. Johnson

Production Coordinator

Adonia Jones

Cover Work

Adonia Jones

Cover Image

Abhinash Sahu

About the Author

Aurelio De Rosa is an Italian web and application developer with more than five years' experience in programming for web using HTML5, CSS3, JavaScript, and PHP. He mainly uses the LAMP stack and frameworks, such as jQuery, jQuery Mobile, and Cordova (PhoneGap). His interests also include web security, web accessibility, SEO, and WordPress.

He is currently self-employed working with the cited technologies and is also a regular blogger for several networks (SitePoint, Tuts+, and FlippinAwesome), where he writes articles about the topics he usually works with and more.

You can find more about him at his website http://www.audero.it.

First of all, I'd like to thank my parents, Raffaele and Eufemia, because they gave me chance to study and follow this path that I've chosen, and for this I owe them. With all your sacrifices, you allowed me to have everything a person may need in his life. I also want to thank Annarita for teaching me the true meaning of the word love. With you my life is full of moments of joy and I hope we'll be together for the rest of our lives. I want to thank Francesco for always being there in the time of need and proving to me that lifetime friendship can really exist.

About the Reviewer

Kent C. Dodds is a young and upcoming front end developer. Kent is