Good introduction to Dojo | Dojo: Using the Dojo JavaScript Library to Build Ajax Applications (Developer's...

book: Dojo: Using the Dojo JavaScript Library to Build Ajax Applications (Developer's Library) | James E. Harmon

books:


	• Dojo: Using the Dojo JavaScript Library to Build Ajax Applications (Developer's Library) James E. Harmon Addison-Wesley Professional, 2008 - 336 pages average customer review:based on 3 reviews view larger image
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3 dojo books in one

"Dojo: Using the Dojo JavaScript Library to Build Ajax Application" is a book for developers. You should know JavaScript and HTML well before starting. There are three main sections of the book which were so different to the point where I thought I was reading three separate books.

The first part rips apart an HTML form then shows how to use Dojo to improve it. I liked the attention to accessibility along with error handling and validation. Dojo was introduced in pieces through example. Except for a couple overly long examples, such as a full page of the HTML source for the 50 states, this section was good. Things build up slowly and clearly so long as you are willing to suspect disbelief about how Dojo works.

The second part introduces Dojo widgets with a picture, API description and examples. Except for the picture, it seemed very similar to the API. This part of the book didn't add much value for me as I can look at the API and examples online.

The third part gets good again. It goes into the details of how Dojo works and some more advanced concepts. It also goes into history and the problems Dojo solves. It was nice having this later in the book so the beginning could be more substantial. I did like how the author went from high level to low level - both with the three parts and even within part three itself. Some pieces stayed a bit to high level such as the AOP and object discussion chapters.

Overall, I was mixed between the three books. The first and third were good and the second I wouldn't pay for.

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Good introduction to Dojo

This book provides a good introduction to Dojo. It answers these questions:
1. What is Dojo?
2. What can Dojo do for me?
3. How can I start using Dojo right now?

You've probably created at least a few (if not many) web forms to gather input from your users and thought "Shouldn't there be an easier way to (insert your complaint here)?" The author goes through a list of these common gripes and shows how you can tackle each one with Dojo. In the beginning, he highlights a few key areas - such as form widgets, validating fields, and form submission. Once you begin to grasp the power and usefulness of Dojo, he goes through a deeper look into all the widgets (form, layout, and specialized) and the base Dojo libraries (string utilities, AJAX utilities, event handling, etc.)

This book is not a complete reference to all things Dojo, but it does a great job of focusing on the common and most used features to get you started. This approach allows you to wade into the Dojo pool at your own pace rather than diving into the deep end and getting quickly overwhelmed by the total package that Dojo offers.

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Dojo offers Web developers and designers a powerful JavaScript toolkit for rapidly developing robust Ajax applications. Now, for the first time, there?s a complete, example-rich developer?s guide to Dojo and its growing library of prepackaged widgets. Reviewed and endorsed by the Dojo Foundation, the creators of Dojo, this book brings together all the hands-on guidance and tested code samples you need to succeed.

Expert Web developer James E. Harmon begins by demonstrating how to ?Ajax-ify? existing applications and pages with Dojo, adding Ajax features such as client- and server-side validation as quickly and nondisruptively as possible. Next, he presents in-depth coverage of Dojo?s user interface, form, layout, and specialized Widgets, showing how they work and how to use them most effectively. Among the Widgets, he covers in detail: Date Pickers, Rich Text Editors, Combo Boxes, Expandable Outlines, and many others.

In conclusion, Harmon introduces the Dojo toolkit?s powerful capabilities for simplifying Ajax development. He thoroughly explains Dojo?s helper functions, shortcuts, and special methods, illuminating each feature with examples of the JavaScript problems it can solve. This section?s far-ranging coverage includes strings, JSON support, event handling, Ajax remoting, Dojo and the DOM, testing, debugging, and much more. All source code examples are provided on a companion Web site, including source code for a complete tutorial case study application.

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