Accelerated DOM Scripting with Ajax, APIs, and Libraries by Jonathan Snook, Stuart Langridge, Aaron Gustafson, Dan Webb

By Jonathan Snook, Stuart Langridge, Aaron Gustafson, Dan Webb

If you're an internet developer with earlier JavaScript and DOM scripting adventure, Accelerated DOM Scripting with Ajax, APIs, and Libraries is ideal so you might take your wisdom to the following level.

This publication is ready JavaScript and utilizing the record item model—the conduit to the HTML record. This publication isn't really approximately studying the right way to software JavaScript from scratch. It begins with the idea that you've got performed a few JavaScript improvement prior to and comprehend the JavaScript syntax. This publication builds on that wisdom to offer you a deeper knowing of DOM scripting and the way to use that in your tasks. It makes use of this new realizing to explain what JavaScript libraries are and express you ways they are often utilized on your undertaking. The booklet also will clarify Ajax and the way most sensible to devise and use it on your initiatives. It explains the right way to construct uncomplicated animation items for including flow to parts at the web page. There are uncomplicated examples that show the strategies used through the book.

JavaScript has obvious a resurgence in recognition over the last few years, and with it has come an exploration of the ability of the language in addition to what it may do in the browser. This publication will clarify suggestions new and old—such as closures, encapsulation, and inheritance—that many are utilizing and the way you could most sensible observe them for your personal projects.

By interpreting this ebook, you will have a better realizing of ways JavaScript works and be capable of use complicated options similar to closures and occasion delegation to construct extra versatile purposes for the internet. You'll stroll away with a better appreciation for JavaScript libraries and the way they could simplify and accelerate your improvement. You'll even be capable of enforce Ajax successfully into your web site, create lighting tricks, use JavaScript libraries, and know the way most sensible to use those libraries in your projects.
<h3>What you’ll learn</h3> * the place CSS, HTML, and the DOM healthy into smooth scripting, and the way to take advantage of them jointly successfully
* Object-oriented programming innovations for extra effective JavaScript coding
* tips on how to use JavaScript libraries equivalent to Prototype on your paintings
* find out how to construct powerful shape validation into your purposes utilizing Ajax
* tips on how to create mashups utilizing APIs
* the right way to construct dynamic consumer interfaces
<h3>Who this booklet is for</h3>
This e-book is for amateur to intermediate builders, and have already got wisdom of HTML, CSS, and JavaScript.
<h3>Table of Contents</h3><ol> * The nation of JavaScript
* HTML, CSS, and JavaScript
* Object-Oriented Programming
* Libraries
* Ajax and information alternate
* visible results
* shape Validation and JavaScript
* Case learn: FAQ Facelift
* A Dynamic support process

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Extra info for Accelerated DOM Scripting with Ajax, APIs, and Libraries

Sample text

The DOM tree diagram, with the attribute and text nodes added As you can see, that tree structure just got a few more branches. Keep in mind—and this is important—that even the space between tags is represented by a text node. IE, in its usual desire to be different, doesn’t recognize that blank space as a node. When you get to traversing the DOM, you’ll need to keep this browser difference in mind (discussed later in this chapter). The document Object Now that you know what the DOM is, let’s have a look at how you use it (using the document object, of course).

Bar(foo); alert(foo); // it's still 5 Passing an object in as a parameter will pass it in by reference. That means that you have full access to the object’s methods and properties, and any changes made to the object will be reflected outside of the function. value = 6; // I'm changing it to 6! value); // it's now 6! qxd 9/6/07 7:55 PM Page 25 CHAPTER 2 ■ HTML, CSS, AND JAVASCRIPT Now, what happens if you try to pass in a function? value = 6; } function bar(func) { func(); // I'm running the function!

When using the getAttribute() method, IE still returns the fully resolved URL, but Mozilla Firefox returns only the exact value of the attribute. href for consistency. ■Note There are a few differences in what the attribute property and what the getAttribute method return. This mostly comes back to problems with the way IE has implemented those features. For example, getAttribute("class") should work, but because IE simply maps the method to the attribute property, and because class is a reserved word, it doesn’t work.

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