Book Image

Catalyst 5.8: the Perl MVC Framework

By : Antano Solar John
Book Image

Catalyst 5.8: the Perl MVC Framework

By: Antano Solar John

Overview of this book

<p>Many web applications are implemented in a way that makes developing them difficult and repetitive. Catalyst is an open source Perl-based Model-View-Controller framework that aims to solve this problem by reorganizing your web application to design and implement it in a natural, maintainable, and testable manner, making web development fun, fast, and rewarding.<br /><br />This book teaches you how to use Catalyst to weave the various components involved in a web application, using methods and tools you personally prefer along with recommendations and details on the most popularly used objects like the DBIX ORM, TT2 Template, and Moose.<br /><br />This book will take you from how the MVC pattern simplifies creating quality applications to how Catalyst allows you to tap this power instantly. It explains advanced design patterns and concludes with the improvements that Moose brings to all this. It also incorporates valuable suggestions and feedback received from the community members and our customers. By the end of the book, you will be able to build clean, scalable, and extendable web applications. This book embodies Catalyst's philosophies of Do It Yourself and Don't Repeat Yourself.</p>
Table of Contents (16 chapters)
Catalyst 5.8
Credits
About the Author
About the Reviewer
Preface
7
Hot Web Topics
Index

AJAX


AJAX is a technique for dynamically adding new data to a web page that's already loaded. It technically stands for asynchronous JavaScript and XML, but the original meaning has been diluted such that AJAX also refers to synchronous JavaScript and JSON, as well. Think of it as DHTML that can dynamically retrieve data from the server in the background.

As JavaScript has matured greatly over the last few years and browser support is generally solid, so there's no reason to shy away from its use. A little JavaScript can greatly improve the user experience for users that choose to enable it.

In this section, we'll improve the AddressBook user interface a bit by adding some AJAX. The end goal is to be able to edit addresses "in place". Instead of clicking "edit" and waiting for the address editing page to load, the text fields will turn into textboxes and the user can begin editing immediately. When he's done, clicking Submit will submit the address for validation and the process will proceed...