Book Image

Learning jQuery - Fourth Edition

By : Karl Swedberg, Jonathan Chaffer
Book Image

Learning jQuery - Fourth Edition

By: Karl Swedberg, Jonathan Chaffer

Overview of this book

To build interesting, interactive sites, developers are turning to JavaScript libraries such as jQuery to automate common tasks and simplify complicated ones. Because many web developers have more experience with HTML and CSS than with JavaScript, the library's design lends itself to a quick start for designers with little programming experience. Experienced programmers will also be aided by its conceptual consistency. LearningjQuery - Fourth Edition is revised and updated version of jQuery. You will learn the basics of jQuery for adding interactions and animations to your pages. Even if previous attempts at writing JavaScript have left you baffled, this book will guide you past the pitfalls associated with AJAX, events, effects, and advanced JavaScript language features. Starting with an introduction to jQuery, you will first be shown how to write a functioning jQuery program in just three lines of code. Learn how to add impact to your actions through a set of simple visual effects and to create, copy, reassemble, and embellish content using jQuery's DOM modification methods. The book will take you through many detailed, real-world examples, and even equip you to extend the jQuery library itself with your own plug-ins.
Table of Contents (24 chapters)
Learning jQuery Fourth Edition
Credits
Foreword
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Extending Ajax capabilities


The jQuery Ajax framework is powerful, as we've seen, but even so there are times when we might want to change the way it behaves. Unsurprisingly, it offers multiple hooks that can be used by plugins to give the framework brand new capabilities.

Data type converters

In Chapter 6, Sending Data with Ajax, we saw that the $.ajaxSetup() function allows us to change the defaults used by $.ajax(), thus potentially affecting many Ajax operations with a single statement. This same function can also be used to add to the range of data types that $.ajax() can request and interpret.

As an example, we can add a converter that understands the YAML data format. YAML (http://www.yaml.org/) is a popular data representation with implementations in many programming languages. In our case, script needs to interact with an alternative format such as this; jQuery allows us to build compatibility for them it into the native Ajax functions.

A simple YAML file containing jQuery method categories...