Book Image

YUI 2.8: Learning the Library

By : Dan Wellman, Daniel Barreiro, Daniel Osvaldo Barreiro
Book Image

YUI 2.8: Learning the Library

By: Dan Wellman, Daniel Barreiro, Daniel Osvaldo Barreiro

Overview of this book

The YUI Library is a set of utilities and controls written in JavaScript for building Rich Internet Applications, across all major browsers and independently of any server technology. There's a lot of functionality baked into YUI, but getting to and understanding that functionality is not for the faint of heart. This book gives you a clear picture of YUI through a step-by-step approach, packed with lots of examples.YUI 2.8: Learning the Library covers all released (non-beta) components of the YUI 2.8 Library in detail with plenty of working examples, looking at the classes that make up each component and the properties and methods that can be used. It includes a series of practical examples to reinforce how each component should/can be used, showing its use to create complex, fully featured, cross-browser, Web 2.0 user interfaces. It has been updated from its first edition with the addition of several chapters covering several new controls and enriched with lots of experience of using them.You will learn to create a number of powerful JavaScript controls that can be used straightaway in your own applications. Besides giving you a deep understanding of the YUI library, this book will expand your knowledge of object-oriented JavaScript programming, as well as strengthen your understanding of the DOM and CSS. The final chapter describes many of the tools available to assist you the developer in debugging, maintaining, and ensuring the best quality in your code. In this new edition, all the examples have been updated to use the most recent coding practices and style and new ones added to cover newer components. Since the basic documentation for the library is available online, the focus is on providing insight and experience.The authors take the reader from beginner to advanced-level YUI usage and understanding.
Table of Contents (18 chapters)
YUI 2.8 Learning the Library
Credits
About the Authors
About the Reviewers
Preface

Watching bits go by


Sometimes the interaction with a certain server is not what we expected. A typo on a URL might get us a 404—Not Found error. At other times, when we assemble URL arguments via code, we miss one or forget to encode them properly, the server, totally baffled, might reply in ways we didn't expect. It often happens that the server returns a nicely formatted HTML page explaining the error when we were expecting an XML or JSON reply. The receiving code on the client side gets confused by such a message intended for humans not for code.

It is good to check out what actually gets sent and received. Firebug already shows that in the Net tab; other browsers may or may not have similar features. In those cases, a tool such as Fiddler (http://www.fiddler2.com/) or Wireshark (http://www.wireshark.org/) is a good choice; both are free.

Fiddler works only on Windows and it is oriented towards web traffic (mostly HTTP) so it is an easier tool to use. Wireshark works on Windows, Mac...