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 online developer with earlier JavaScript and DOM scripting adventure, Accelerated DOM Scripting with Ajax, APIs, and Libraries is ideal that you can take your wisdom to the subsequent level.

This publication is set JavaScript and utilizing the rfile item model—the conduit to the HTML record. This publication isn't approximately studying how you can 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 booklet builds on that wisdom to offer you a deeper figuring out of DOM scripting and the way to use that for your tasks. It makes use of this new figuring out to explain what JavaScript libraries are and convey you ways they are often utilized on your undertaking. The publication also will clarify Ajax and the way top to devise and use it on your tasks. It explains the way to construct uncomplicated animation items for including flow to parts at the web page. There are straight forward examples that exhibit the recommendations used during the book.

JavaScript has visible a resurgence in acceptance during the last few years, and with it has come an exploration of the facility of the language in addition to what it may possibly do in the browser. This ebook will clarify recommendations new and old—such as closures, encapsulation, and inheritance—that many are utilizing and the way you could top observe them for your personal projects.

By examining this e-book, you will have a better realizing of ways JavaScript works and be ready to use complex innovations similar to closures and occasion delegation to construct extra versatile purposes for the net. 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 in a position to enforce Ajax successfully into your website, create lighting tricks, use JavaScript libraries, and know the way most sensible to use those libraries for your projects.
<h3>What you’ll learn</h3> * the place CSS, HTML, and the DOM healthy into sleek scripting, and the way to take advantage of them jointly successfully
* Object-oriented programming ideas for extra effective JavaScript coding
* the way to use JavaScript libraries corresponding to Prototype on your paintings
* easy methods to construct powerful shape validation into your functions utilizing Ajax
* easy methods to create mashups utilizing APIs
* the way to construct dynamic consumer interfaces
<h3>Who this ebook is for</h3>
This publication is for amateur to intermediate builders, and have already got wisdom of HTML, CSS, and JavaScript.
<h3>Table of Contents</h3><ol> * The country of JavaScript
* HTML, CSS, and JavaScript
* Object-Oriented Programming
* Libraries
* Ajax and information trade
* visible results
* shape Validation and JavaScript
* Case learn: FAQ Facelift
* A Dynamic aid approach
</ol>

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

Sample text

Specificity is calculated by using four levels: A. Count 1 if the selector is the style attribute. Style rules take precedence over everything else. B. Count the number of id attributes in the selector. C. Count the number of other attributes (including classes and pseudoclasses) in the selector. D. Count the number of element names (including pseudoelement names) in the selector. Let’s take a look at a few examples, each one increasing in specificity (see Table 2-1): Table 2-1. list {} 0 1 1 3 #pagetodo #todolist {} 0 2 0 0 There are two factors for deciding whether something has higher specificity: • The larger number at a certain level has a higher specificity.

What Is the DOM? The DOM is an application programming interface (API) that defines a set of objects along with their properties and methods. The API was designed to be generic enough for both XML and HTML. qxd 26 9/6/07 7:55 PM Page 26 CHAPTER 2 ■ HTML, CSS, AND JAVASCRIPT The DOM is actually a number of different recommendations, and while I refer to them as one big standard, there are actually three different recommendations with various components to each. The DOM is broken down into DOM Level 0, 1, 2, and 3: • DOM Level 0 doesn’t actually exist as a recommendation of the W3C.

This results in a more reliable rendering across browsers. If you want to test whether the HTML you have written is valid, many applications such as Adobe Dreamweaver have built-in validation tools. org). Semantic HTML Semantic HTML is an important and crucial point that often gets lost in the idea of creating valid HTML. Using semantic HTML means using elements that are appropriate for the content that it contains. This is important for a few reasons. For one, those who use assistive technologies such as screen readers will have an easier time navigating your page and will also get a more natural read.

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