AdvancED DOM Scripting: Dynamic Web Design Techniques by Jeffrey Sambells

By Jeffrey Sambells

As an online clothier or developer, you know the way robust DOM scripting is for boosting web content and functions, including dynamic performance and bettering the consumer adventure. you have got a cheap figuring out of JavaScript and the DOM, yet now you must take your talents additional. This publication is all you have to do soit indicates you ways so as to add crucial performance on your web content, equivalent to at the fly structure and magnificence alterations, interface personalization, maps and seek utilizing APIs, visible results utilizing JavaScript libraries, and lots more and plenty more.

  • Includes a brief recap of the fundamentals, for reference purposes.
  • Packed with actual global JavaScript strategies from commencing to end
  • Written through "Beginning Google Maps" writer Jeffrey Sambells, and contains a case examine via JavaScript guru Aaron Gustafson.

What you’ll learn

  • A fast recap of the HTML and CSS DOM, equipment, and events.
  • Shows you the fundamentals of ways so as to add dynamic results and reply to consumer activities for your sites utilizing CSS and JavaScript.
  • Introduces Ajax to the combination, displaying you ways to take advantage of it, and whilst to not use it.
  • Learn most sensible practices (such as swish degredation) and productiveness development through code reuse (libraries and APIs)
  • Create Mashups utilizing seek, photograph and mapping APIs.
  • Build larger, extra dynamic person stories utilizing libraries corresponding to Prototype and Scriptaculous.

Who this e-book is for

This booklet is for intermediate to complicated net designers and builders who have already got a cheap to sturdy wisdom of HTML, CSS, and JavaScript.

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An alternative method of iteration uses the for loop for every property in the list: var list = [1,2,3,4]; for( i in list ) { alert(list[i]); } In this case, it will give you exactly the same results, because list is an Array object. Exercise caution when you use the for( i in item ) approach on objects that act as arrays but aren’t Arrays. getElementsByTagName('*'); for( i in all) { // Do something with all[i] element } You’ll have an iteration where the value of i is equal to length, item, and namedItem, which may cause unexpected errors in your code.

Name/weblog/2005/10/add-event). org/projects/flexible-javascript-events). Each accomplishes the same goal— registering an event listener on an element—but I’ve included John Resig’s version because it’s simple, doesn’t degrade the various features of the different event methods, and fixes a few inconsistencies between the W3C and Microsoft event registration models. You’ll be looking at events in much more detail later in Chapter 4. eventPreventDefault() method in this example in Chapter 4. It’s used to prevent the anchor from following the link in the href attribute.

Lookup mentioned earlier for the DOM object reference and reversed the order of their arguments so that the class name is first rather than last, because Firefox 3 will be introducing a core getElementsByClassName() method that takes the class as the first argument (matching that will mean fewer code changes if you want to switch to the internal method in the future). Basically, the method works by walking the DOM document tree looking for a specific className and an optional node and tag filter; it retrieves all the DOM elements associated with the specified class, node, and tag.

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