Book Image

MooTools 1.3 Cookbook

By : Jay L Johnston
Book Image

MooTools 1.3 Cookbook

By: Jay L Johnston

Overview of this book

MooTools is a JavaScript framework that abstracts the JavaScript language. JavaScript itself, complex in syntax, provides the tools to write a layer of content interaction for each different browser. MooTools abstracts those individual, browser-specific layers to allow cross-browser scripting in an easy-to-read and easy-to-remember syntax. Animation and interaction, once the domain of Flash, are being taken by storm by the MooTools JavaScript framework, which can cause size, shape, color, and opacity to transition smoothly. Discover how to use AJAX to bring data to today's web page users who demand interactivity without clunky page refreshes. When searching for animation and interactivity solutions that work, MooTools 1.3 Cookbook has individual, reusable code examples that get you running fast! MooTools 1.3 Cookbook readies programmers to animate, perform AJAX, and attach event listeners in a simple format where each section provides a clear and cross-browser compatible sketch of how to solve a problem, whether reading from beginning to finish or browsing directly to a particular recipe solution. MooTools 1.3 Cookbook provides instant solutions to MooTools problems – whatever you want to do with MooTools, this book will tell you how to do it. MooTools 1.3 Cookbook is presented in a progressive order that builds concepts and ideas, while simultaneously being a collection of powerful individual, standalone, recipe solutions.
Table of Contents (17 chapters)
MooTools 1.3 Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Extending images—lazy load


Here again, we extend our base object imgmootater.

Getting ready

And, again, the preparation for this recipe is the imgmootater class itself. Sound the trumpets!

var imgmootater = new Class({
initialize: function() { this.imgs = $$('img'); },
make_titles: function() {
this.imgs.each(function(el){
el.set('title',el.get('alt'));
});
}
});

How to do it...

Extend the imgmootater class. Perhaps somewhat academically, we are extending something that already does an action we need. In this case, at least academically, we are demonstrating a recipe that shows that imgmootater does a great deal of important, reusable work. In this example, what it does is duplicate the ALT attribute metadata into the TITLE attribute so that mouse over shows the metadata.

The new implementation of the class will be called lazyloader and will focus on IMG elements that have a place-holding image as their SRC. Add an onScroll event to the window and bind to it the class function, which checks...