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<title>JavaScript - Web Developer Tutorials</title>
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<description>JavaScript Tutorials at Dev Shed.  DevShed is a community focused on both beginner and advanced tutorials in Java, C, PHP, Python, MySQL and Ruby-on-rails...amongst others.</description>
<language>en-us</language>
<lastBuildDate>Wed, 19 Jun 2013 02:29:38 -0400</lastBuildDate>
<pubDate>Wed, 19 Jun 2013 02:29:38 -0400</pubDate>
<item><title>Javascript for Beginners: An Introduction</title>
<pubDate>Fri, 10 Aug 2012 16:33:50 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/Javascript-for-Beginners-An-Introduction-62071/</link>
		<description><![CDATA[Welcome to the first installment in a series that will teach you how to add Javascript functionality to your website and make your HTML pages more interactive.]]></description>
		<content:encoded><![CDATA[When I first started working for the Dev Shed sites all the way back in 2007, I was quickly tasked with what - at the time - seemed to be an impossible task: write articles on every topic known to man. At that time, I was a lowly writer and not yet the mighty Editor-in-Chief that stands before you today. I knew bits and pieces of a handful of languages, but Javascript was not one of them. I started off writing about Java, Ruby on Rails, PHP, Perl, and Python. I slowly started branching out and inevitably, I was asked to do some articles on HTML, CSS, and of course, Javascript.  Sitting down to...]]></content:encoded>
<category>JavaScript</category>
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<item><title>Introduction to JavaScript</title>
<pubDate>Wed, 08 Jul 2009 10:00:46 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/Introduction-to-JavaScript/</link>
		<description><![CDATA[JavaScript is an online scripting language that is implemented and works directly with HTML pages. Similar to Flash and ActionScript, JavaScript brings a dynamic nature to web pages that does not require the page to change. Obviously, this functionality is very useful for a wide variety of reasons. JavaScript can make a developers life a lot easier in a lot of ways. On the other hand, the various down sides of implementing JavaScript are significant sometimes too much so.]]></description>
		<content:encoded><![CDATA[Any time that a developer would like to change the content of a web page without actually changing the page, JavaScript is a natural option. Flash and ActionScript is basically the only other option. A developer may decide to use JavaScript for a variety of reasons, many of which include the various down sides of Flash development. However, one of the main reasons for a developer's choice might be that they are not familiar with Flash. JavaScript is much easier to learn for individuals that are not as creatively inclined. Because JavaScript is integrated directly into the web page, there is no...]]></content:encoded>
<category>JavaScript</category>
<guid isPermaLink="true">http://www.devshed.com/c/a/JavaScript/Introduction-to-JavaScript/</guid>
</item>
<item><title>Adding Elements to a Tree with TreeView jQuery</title>
<pubDate>Wed, 13 May 2009 10:00:47 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/Adding-Elements-to-a-Tree-with-TreeView-jQuery/</link>
		<description><![CDATA[When it comes to building hierarchical menus that will be used as part of web-based navigational interfaces, one of the best solutions available today is a powerful jQuery plug-in called TreeView. This package comes with a number of handy options that allow you to create collapsible trees very quickly by using only a few simple nested HTML lists. This is the conclusion to a six-part series that uses numerous code samples to show you how to master the main features provided by the TreeView library.]]></description>
		<content:encoded><![CDATA[Naturally, if you've read the previous installment of this series, it's quite possible that you already have a clear idea of how to utilize the great variety of options offered by this plug-in to create truly dynamic hierarchical trees. In that specific article, I explained how to use the  persist  parameter to easily save the state of a given tree across several HTTP requests.  In reality, the  persist  option takes two possible values. The first one, called  location,  allows you to maintain the settings of the tree via the  href  attributes of the hyperlinks that comprise it, while the seco...]]></content:encoded>
<category>JavaScript</category>
<guid isPermaLink="true">http://www.devshed.com/c/a/JavaScript/Adding-Elements-to-a-Tree-with-TreeView-jQuery/</guid>
</item>
<item><title>Using the Persist Argument in a TreeView jQuery Navigation System</title>
<pubDate>Tue, 12 May 2009 10:00:48 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/Using-the-Persist-Argument-in-a-TreeView-jQuery-Navigation-System/</link>
		<description><![CDATA[Welcome to the fifth episode of a series covering how to build a hierarchical navigation system with the TreeView jQuery plug-in. Comprised of six parts, this series walks you through mastering the main features provided by this plug-in.]]></description>
		<content:encoded><![CDATA[Among the huge variety of plug-ins that are currently available to use with the jQuery JavaScript library, there's one that may be particularly appealing to many web designers wanting to include hierarchical menus into their web sites very quickly. Of course, in this case I'm talking about the  TreeView  package, a powerful jQuery add-on that allows you to create collapsible navigation systems by using only a few simple JavaScript methods along with some nested HTML lists. Thus, if you feel curious and wish to learn how to put this library to work for you in a true effortless fashion, then don...]]></content:encoded>
<category>JavaScript</category>
<guid isPermaLink="true">http://www.devshed.com/c/a/JavaScript/Using-the-Persist-Argument-in-a-TreeView-jQuery-Navigation-System/</guid>
</item>
<item><title>Using Unique and Toggle in a TreeView jQuery Hierarchical Navigation System</title>
<pubDate>Mon, 11 May 2009 10:00:46 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/Using-Unique-and-Toggle-in-a-TreeView-jQuery-Hierarchical-Navigation-System/</link>
		<description><![CDATA[The TreeView jQuery plug-in is a small yet powerful JavaScript application that allows you to build hierarchical navigation systems whose branches can be collapsed and expanded using different animation effects. So if youre planning to develop a web site that includes a navigation mechanism like this, start reading this series of articles. In it youll find a concise guide that will show you how to master the plug-ins main features, by means of copious hands-on examples. This article is the fourth of six parts.]]></description>
		<content:encoded><![CDATA[Naturally, if you've been a patient reader and already went through the previous chapter of the series, then it's quite possible that you're pretty familiar with the basic capabilities offered by the  TreeView  library. In that particular tutorial I explained how to work with its  animate  option, which can be used  for applying a couple of appealing scrolling effects to the branches of a selected tree while they're being closed and extended. Of course, when it comes to exploring the numerous capacities offered by the  TreeView  plug-in, I must say that there's still a fair bit to learn. It co...]]></content:encoded>
<category>JavaScript</category>
<guid isPermaLink="true">http://www.devshed.com/c/a/JavaScript/Using-Unique-and-Toggle-in-a-TreeView-jQuery-Hierarchical-Navigation-System/</guid>
</item>
<item><title>Using Event Delegation for Mouseover Events in List Items</title>
<pubDate>Wed, 06 May 2009 10:00:46 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/Using-Event-Delegation-for-Mouseover-Events-in-List-Items/</link>
		<description><![CDATA[JavaScript-based event delegation is an efficient approach that allows us to reduce the number of event handlers included in a client-side application. This naturally contributes to improving its overall performance and reliability. This technique rests its functionality on the bubbling phase triggered by a specific event. Its very simple to learn to code in real-world conditions. This article concludes a four-part series on event delegation.]]></description>
		<content:encoded><![CDATA[Therefore, if you're a web designer who's interested in mastering the key concepts that surround event delegation in JavaScript, this set of articles contains numerous hands-on examples that will get you started using this approach within your own client-side applications.   And speaking of practical examples, now it's time to review quickly the ones that were developed in the preceding article. In that particular tutorial I explained how to implement the event delegation approach to highlight the items of an unordered HTML list each time a mouse click occurred on each of them.  This effect wa...]]></content:encoded>
<category>JavaScript</category>
<guid isPermaLink="true">http://www.devshed.com/c/a/JavaScript/Using-Event-Delegation-for-Mouseover-Events-in-List-Items/</guid>
</item>
<item><title>Using the Animate Option in a Treeview jQuery Hierarchical Navigation System</title>
<pubDate>Mon, 04 May 2009 10:00:47 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/Using-the-Animate-Option-in-a-Treeview-jQuery-Hierarchical-Navigation-System/</link>
		<description><![CDATA[Welcome to the third chapter of a series on creating a hierarchical navigation system with the TreeView jQuery plug-in. Made up of six tutorials, this series explores in detail the main features that come packaged with this helpful JavaScript extension. It shows you how to get the most out of it with copious code samples.]]></description>
		<content:encoded><![CDATA[If you're planning to develop a web site or an application that provides users with the ability to move across different sections of it with a hierarchical navigation system, then you might want to take a look at the TreeView jQuery plug-in. This JavaScript library will let you build a system like this in a truly unobtrusive fashion, utilizing only a few nested HTML lists. Naturally, if you already had the opportunity to read the two preceding articles of the series, then you've become familiar with using the plug-in for building some simple hierarchical trees whose branches can be completely ...]]></content:encoded>
<category>JavaScript</category>
<guid isPermaLink="true">http://www.devshed.com/c/a/JavaScript/Using-the-Animate-Option-in-a-Treeview-jQuery-Hierarchical-Navigation-System/</guid>
</item>
<item><title>Using HTML Lists with Event Delegation in JavaScript</title>
<pubDate>Wed, 29 Apr 2009 10:00:47 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/Using-HTML-Lists-with-Event-Delegation-in-JavaScript/</link>
		<description><![CDATA[Do you enjoy the responsiveness that using event handlers in JavaScript adds to your web site, but feel concerned about the way they can slow down your applications? Fear not; this four-part article series covers event delegation, a technique that can solve this problem in certain situations. This article is the third part of the series.]]></description>
		<content:encoded><![CDATA[Event handlers play a fundamental role within any JavaScript application, since they keep track of mouse clicks, keyboard and window events, and so forth. Logically, their existence permits us to develop client-side programs that are much more responsive than an application running in the web server. However, when overused, event handlers can seriously slow down the performance of a JavaScript program, and in extreme cases can produce complete system hang-ups. Yet, in certain situations (not all) it's possible to reduce the number of event handlers that will be used within a particular JavaScr...]]></content:encoded>
<category>JavaScript</category>
<guid isPermaLink="true">http://www.devshed.com/c/a/JavaScript/Using-HTML-Lists-with-Event-Delegation-in-JavaScript/</guid>
</item>
<item><title>Opened and Closed Branches on a TreeView jQuery Hierarchical Navigation System</title>
<pubDate>Mon, 27 Apr 2009 10:00:46 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/Opened-and-Closed-Branches-on-a-TreeView-jQuery-Hierarchical-Navigation-System/</link>
		<description><![CDATA[If youre interested in mastering the main features that come bundled with the TreeView jQuery plug-in, start reading this series of articles. In it youll find numerous examples that will teach you how to utilize this library to build all sorts of professional-looking navigation trees. This is the second part of a four-part series.]]></description>
		<content:encoded><![CDATA[Building a web-based hierarchical navigation mechanism that permits you to collapse and expand its branches with simple mouse clicks can be challenging even for the most seasoned web designer, especially when developing such an application from scratch. However, there's no need to go to that extreme, since numerous JavaScript libraries are available that can tackle the development process from start to finish and produce amazing results. Among these freely downloadable packages, there's one that might be especially appealing to you, due to its flat learning curve and ease of customization. In ...]]></content:encoded>
<category>JavaScript</category>
<guid isPermaLink="true">http://www.devshed.com/c/a/JavaScript/Opened-and-Closed-Branches-on-a-TreeView-jQuery-Hierarchical-Navigation-System/</guid>
</item>
<item><title>Mouseover Events and Event Delegation in JavaScript</title>
<pubDate>Wed, 22 Apr 2009 10:00:47 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/Mouseover-Events-and-Event-Delegation-in-JavaScript/</link>
		<description><![CDATA[Expressed in simple terms, JavaScript event delegation is a smart approach that permits you to reduce the number of event handlers assigned to the elements of a web page by using the bubbling phase of a specific event. With this easy-to-learn technique you can significantly improve the performance of JavaScript applications. This is the second article in a four-part series.]]></description>
		<content:encoded><![CDATA[Therefore, if you're interested in learning how to implement event delegation within your own JavaScript programs, then in this group of articles you'll find an approachable guide that will help you to master the key concepts that drive this powerful approach, with numerous code samples.  Now that you've been introduced to the subject of this series of tutorials, it's time to quickly review the topics that I discussed in the last part. In that particular article I explained how to implement event delegation in JavaScript without being an expert in client-side scripting.  Speaking more specific...]]></content:encoded>
<category>JavaScript</category>
<guid isPermaLink="true">http://www.devshed.com/c/a/JavaScript/Mouseover-Events-and-Event-Delegation-in-JavaScript/</guid>
</item>
<item><title>Creating a TreeView JQuery Hierarchical Navigation System</title>
<pubDate>Mon, 20 Apr 2009 10:00:47 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/Creating-a-TreeView-JQuery-Hierarchical-Navigation-System/</link>
		<description><![CDATA[Are you interested in adding animation effects to the drop-down menus on your web page, but afraid that it's going to take long hours of painful coding to pull it off? Keep reading. This series of articles will show you how to work some easy magic with the Treeview JQuery plug-in and a simple nested HTML list.]]></description>
		<content:encoded><![CDATA[As you may have noticed, hierarchical navigation systems are a common part of many web-based front-ends these days. Undeniably, the most typical implementation of these systems is via drop-down menus, which may contain different subcategories that users can navigate easily. In reality, web sites that stick to the standards usually include this kind of drop-down menu in the form of nested HTML lists, which are hidden and displayed properly on screen by means of a few simple CSS styles. As long as these hierarchical structures permit users to navigate sections of a web site without sacrificing a...]]></content:encoded>
<category>JavaScript</category>
<guid isPermaLink="true">http://www.devshed.com/c/a/JavaScript/Creating-a-TreeView-JQuery-Hierarchical-Navigation-System/</guid>
</item>
<item><title>Event Delegation in JavaScript</title>
<pubDate>Wed, 15 Apr 2009 10:00:46 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/Event-Delegation-in-JavaScript/</link>
		<description><![CDATA[Anyone who has spent a long time building JavaScript applications knows how important event handlers can be for processing certain common user actions, such as mouse clicks, windows and keyboard events, and so forth. However, while event handlers are a powerful feature for creating highly responsive JavaScript programs with relative ease, they have been overused way too frequently. This has implications for how quickly certain kinds of JavaScript programs run. Fortunately, JavaScript event delegation can help solve many of these problems. This four-part series explains how.]]></description>
		<content:encoded><![CDATA[Many web designers now implement event handlers more carefully, and resist the temptation to fire up functions and classes each time users click on different elements across a web page.  Regardless of this promising scenario, it's common to see JavaScript programs that use event handlers in a poor and inefficient way. Let me explain this concept a bit further with an example: suppose for a moment that there's a server-side application that pulls a product catalog from a database table and displays its contents via a typical HTML table.   So far, so good, right? Now, it's possible to extend the...]]></content:encoded>
<category>JavaScript</category>
<guid isPermaLink="true">http://www.devshed.com/c/a/JavaScript/Event-Delegation-in-JavaScript/</guid>
</item>
<item><title>A Look at the New YUI Carousel Control</title>
<pubDate>Mon, 13 Apr 2009 10:00:46 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/A-Look-at-the-New-YUI-Carousel-Control/</link>
		<description><![CDATA[The Yahoo! User Interface library continues to grow and expand with new components being added and existing components being continually patched and updated to ensure full x-browser support and cutting-edge functionality. Version 3 of the YUI is due for full release at some point this year, but version 2 (current release 2.6) is at this point still the stable and recommended release for general use.]]></description>
		<content:encoded><![CDATA[One of the components recently added is the Carousel component, a control for automatically scrolling content in an attractive and intuitive interface. It's still a beta release at present ,which indicates that the API is not finalized and that there are likely to be bugs that need addressing. We can still use the component, though, and although we should be wary as the existing API may change, the full release will probably bring more new functionality than changes in how it is implemented.  In this tutorial we'll be looking at a basic implementation of the control, the functionality we can u...]]></content:encoded>
<category>JavaScript</category>
<guid isPermaLink="true">http://www.devshed.com/c/a/JavaScript/A-Look-at-the-New-YUI-Carousel-Control/</guid>
</item>
<item><title>Working with Draggable Elements and Transparent Handles with the Ext JS Library</title>
<pubDate>Mon, 06 Apr 2009 10:00:46 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/Working-with-Draggable-Elements-and-Transparent-Handles-with-the-Ext-JS-Library/</link>
		<description><![CDATA[When it comes to building full-blown web-based interfaces, Ext JS is quite possibly one of the most powerful libraries available nowadays. It's equipped with an impressive set of JavaScript classes that allow you to create all sorts of clever things, ranging from simple yet professional message windows, to desktop-like data grids and shadowed drop-down menus. This third part of a three-part series covers just one of its features, which lets you give interesting abilities to containers.]]></description>
		<content:encoded><![CDATA[Introduction  Among the dynamic modules that comprise the Ext JS framework, there's one that might be particularly interesting to you. It presents an easy learning curve and can be used for extending the behavior of server-side applications. In this case, I'm talking about its  Resizable  class, which is useful for building containers that can be dynamically resized and dragged across a web document.  In the two previous episodes of this series, I explained how to create this kind of container, and also discussed in detail how to customize the look of the handles displayed around these web pag...]]></content:encoded>
<category>JavaScript</category>
<guid isPermaLink="true">http://www.devshed.com/c/a/JavaScript/Working-with-Draggable-Elements-and-Transparent-Handles-with-the-Ext-JS-Library/</guid>
</item>
<item><title>Displaying Pinned Handles with Resizable Containers with the Ext JS Library</title>
<pubDate>Mon, 30 Mar 2009 10:00:46 -0400</pubDate>
<link>http://www.devshed.com/c/a/JavaScript/Displaying-Pinned-Handles-with-Resizable-Containers-with-the-Ext-JS-Library/</link>
		<description><![CDATA[As a web designer, you know that building resizable divs for a web site can be a pretty challenging task, particularly if youre planning to do this from scratch. Theres no need to reinvent the wheel, though, since there are a few handy JavaScript frameworks available nowadays, such as Ext JS and jQuery, that allow you to create this class of dynamic containers in a truly painless fashion. So if youre interested in learning how to incorporate dynamic resizing capabilities into certain containers on your web site using the Ext JS package, then this series of articles might be what youre looking for.]]></description>
		<content:encoded><![CDATA[Welcome to the second part of a series focused on building resizable containers with the Ext JS library. Made up of four approachable tutorials, this series teaches you with numerous code samples how to create containing elements that can be completely resized and dragged across a web page.   This is a good time to review the topics that were discussed in the last article. In that part of the series, I explained how to work with the  Resizable  class provided by the Ext JS framework to build a couple of divs which could be dynamically resized.   In addition, I discussed the use of the  wrap  a...]]></content:encoded>
<category>JavaScript</category>
<guid isPermaLink="true">http://www.devshed.com/c/a/JavaScript/Displaying-Pinned-Handles-with-Resizable-Containers-with-the-Ext-JS-Library/</guid>
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