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—add captions based on ALT attributes


Often we have to work with images, changing how we display metadata related to the images.

Getting ready

Get ready to extend images on our pages by beginning with a base class to mutate downstream classes.

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

To prevent this from being just a boring interface with no real station in life, add a common function, which is to duplicate the IMG tag required ALT attribute into the TITLE attribute so that mouseover actions will display the otherwise hidden metadata.

How to do it...

Extend this class while maintaining inheritance from the parent object; use the Implements keyword. The initialize function of the parent class is executed before the construct method of the new, extended object, thereby populating this.imgs.

var imgcaptions = new Class({
Implements: imgmootater...