The WordPress and Ajax e-book is a comprehensive view on using Ajax  with WordPress.  It covers Ajax like you've never seen before.  The book contains three real-life examples that provide the rationale   and logic behind coding decisions, the reasons for Ajax's use, and the  steps from inception to completion of the examples.First, the book builds a foundation for you to send your first Ajax request.  This includes:  An explanation of Ajax best practices - What Ajax should do, and what it isn't meant to do.How to add scripts  and styles properly to WordPress - How plugin  and theme authors should add scripts to WordPress.  This also covers  page detection and other advanced techniques.Properly formatting scripts using jQuery - How to adhere to the  jQuery authoring guidelines for easy-to-read code and maximum  compatibility.Localizing your JavaScript files - How to add localized JavaScript variables without using PHP.An explanation on how to override someone's scripts and styles.WordPress security, including nonces and data validation.Several different Ajax techniques are explained.After the foundation has been built, the book introduces you to sending you first request.  Sending your first request includes learning:  Learning the code foundation for sending that first request.Adding server-side security for the request.Processing the request on the server-side.Responding to the request on the server-side.Parsing the response on the client-side.Outputting the data to the user.After the foundation has been laid and you have a good idea of the theory behind an Ajax request, we begin work on the examples.  Example 1:  WP Grins Lite - We take a common and popular plugin and convert it to use Ajax for the loading of the smilies.Example 2:  Static Random Posts - We take a common widget and add an   Ajax function to it.  This example will not only teach you how to  create a widget, but also an admin panel, and Ajax functionality.Example 3: Ajax Registration Form - We take an ordinary registration form and perform data validation on it using Ajax.

Wordpress and Ajax: An In-Depth Guide on Using Ajax With WordPress PDF

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