Book Image

YUI 2.8: Learning the Library

Book Image

YUI 2.8: Learning the Library

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

A very simple slider


What we're aiming to achieve over the course of this example is to produce a small widget that visitors to your site could use to dynamically change the font size of text on the page in a visually appealing manner.

I know that the font-size of any given page can easily be adjusted by your visitors using the native method of their browser's UI, but it's a nice effect to have directly on your own pages, it promotes usability, and would sit nicely in a "user control panel" area of your site/page.

The screenshot below demonstrates how our slider will appear by the end of this example:

Getting started

The required dependencies for Slider are the ever-present yahoo-dom-event.js, dragdrop-min.js and of course, slider-min.js. We will also use the optional animation-min.js. You can try the example both with and without. The only way to notice it's there is by clicking in the bar and letting the thumb reach that place instead of dragging the thumb itself. Slider requires slider...