So far we have only dealt with successful responses to Ajax requests, loading the page with new content when everything goes as planned. Responsible developers, however, should account for the possibility of network or data errors and report them appropriately. Developing Ajax applications in a local environment can lull developers into a sense of complacency since, aside from a possible mistyped URL, Ajax errors just don't happen locally. Unfortunately, the Ajax convenience methods such as $.get()
and .load() do not provide an error callback argument themselves, so the global .ajaxError() method has been, at least in early versions of jQuery, the only way to handle errors with these methods. However, with the overhaul of jQuery's Ajax component in version 1.5, we now can chain success(), complete(), and error() callbacks to any Ajax function except .load(). For example, we can take the code from Listing 6.16 and change the URL to one that doesn't exist, we can test the error...
Learning jQuery, Third Edition
Learning jQuery, Third Edition
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.Learning jQuery Third Edition is revised and updated for version 1.6 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 step you through many detailed, real-world examples, and even equip you to extend the jQuery library itself with your own plug-ins.
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Table of Contents (24 chapters)
Learning jQuery Third Edition
Credits
Foreword
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Free Chapter
Getting Started
Selecting Elements
Handling Events
Styling and Animating
Manipulating the DOM
Sending Data with Ajax
Using Plugins
Developing Plugins
Advanced Selectors and Traversing
Advanced Events
Advanced Effects
Advanced DOM Manipulation
Advanced Ajax
JavaScript Closures
Testing JavaScript with QUnit
Quick Reference
Index
Customer Reviews