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

Showing an alert if an Ajax call fails


If our visitor's Internet connection fails, our script should tell them the Ajax will not work either.

How to do it...

Create a test script that makes an Ajax call. Ensure the call will fail by using a fake domain that will not resolve.

<form action="" method="get">
<input type="button" id="mybutton" value="Ajax!"/>
</form>
<script type="text/javascript">
var myJax = new Request({
url: 'http://incorrectdomain.com/nofileexists',
onFailure: function() {
alert('error connecting, Ajax call has failed :(');
},
onSuccess: function(response) {
alert('Success! Here is the response: '+response);
}
});
$('mybutton').addEvent('click', function ajax_it() {
myJax.send();
});
</script>

How it works...

Using a fake URL will create the same failure as a lack of Internet connectivity. The call cannot complete because it cannot contact the requested file for processing.

There's more...

If this script looks familiar, it is because it is nearly...