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

Removing a chain of events


Extending upon the chain of events created in the previous section, this recipe shows us how to clear a chain of events using Chain.clearChain().

Getting ready

Get ready to call this function by adding a widget to which our clearing function can be bound.

<input type="button" id="mycancel" value="Clear Chain"/>

How to do it...

Calling the clearChain() method of the my_chain object, which is an instantiation of MooTools Chain, removes the current call stack completely.

$('mycancel').addEvent('click',function() {
alert('Clearing chain:'+my_chain.$chain.length+' actions');
my_chain.clearChain();
alert('Done! Chain has:'+my_chain.$chain.length+' actions');
});

How it works...

Each call to my_chain.chain(advance_one_number) added another array argument to the internally maintained $chain array. This array is a property of the chain object instantiation. Calling my_chain.clearChain() zeroes out the $chain property of my_chain.

There's more...

As seen in the next screenshot...