Book Image

Learning jQuery 3 - Fifth Edition

By : Jonathan Chaffer, Karl Swedberg
Book Image

Learning jQuery 3 - Fifth Edition

By: Jonathan Chaffer, Karl Swedberg

Overview of this book

If you are a web developer and want to create web applications that look good, are efficient, have rich user interfaces, and integrate seamlessly with any backend using AJAX, then this book is the ideal match for you. We’ll show you how you can integrate jQuery 3.0 into your web pages, avoid complex JavaScript code, create brilliant animation effects for your web applications, and create a flawless app. We start by configuring and customising the jQuery environment, and getting hands-on with DOM manipulation. Next, we’ll explore event handling advanced animations, creating optimised user interfaces, and building useful third-party plugins. Also, we'll learn how to integrate jQuery with your favourite back-end framework. Moving on, we’ll learn how the ECMAScript 6 features affect your web development process with jQuery. we’ll discover how to use the newly introduced JavaScript promises and the new animation API in jQuery 3.0 in great detail, along with sample code and examples. By the end of the book, you will be able to successfully create a fully featured and efficient single page web application and leverage all the new features of jQuery 3.0 effectively.
Table of Contents (23 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Dedication
Preface

Customizing and optimizing selectors


 Many techniques that we've seen give us a tool chest that can be used to find any page element we want to work with. The story doesn't end here though; there is much to learn about performing our element-finding tasks efficiently. This efficiency can take the form of both code that is easier to write and read, and code that executes more quickly inside the web browser.

Writing a custom selector plugin

One way to improve legibility is to encapsulate code snippets in reusable components. We do this all the time by creating functions. In Chapter 8, Developing Plugins, we expanded this idea by crafting jQuery plugins that added methods to jQuery objects. This isn't the only way plugins can help us reuse code, though. Plugins can also provide additional selector expressions, such as the :paused selector that Cycle gave us in Chapter 7, Using Plugins.

The easiest type of selector expression to add is a pseudo-class. This is an expression that starts with a colon...