Ajax
Introduction:
Ajax, shorthand for Asynchronous Javascript and XML, is a set of technologies that allows you to create Web applications that don’t need to refresh Web pages in the browser. You can operate behind the scenes, connecting to the server, uploading and downloading data, and display the results in the browser using dynamic HTML. Using Ajax gives your Web pages the feel of a desktop application-the whole display will no longer flash when you click a button. VTC Author Steve Holzner helps you get started developing and building your own Ajax capable web pages. A familiarity with JavaScript, XML, PHP is recommended for this course.
Java Ajax Course Content:
1.Introduction
- Creating a request object
- Requesting the data
- Asynchronous data transfer
- Using the readyState property
- Using a callback function
- Using innerHTML
- Sending the request
- Requesting the data
- Error handling with try/catch
- Understanding HTTP
2.Using XML and JSON in Ajax applications
- XML basics
- XML and the DOM
- Using responseText
- Using responseXML
- JSON vs XML
- JSON basics
- Using JavaScript literals
- Using CSS with Ajax
3.Object-oriented JavaScript and custom Ajax objects
- The new operator
- Object constructors
- Prototypes
- Using custom Ajax objects
- Ajax and forms
- Encoding
4.Troubleshooting and Debugging Ajax
- The onerror event handler
- Debugging Ajax with Firebug
- Tools for navigating the DOM
- The Firefox DOM Inspector
- The IE DOM Inspector
- The Mouseover DOM Inspector (MODI)
- Live HTTP Headers
- HTTP Status Codes
5.Using JavaScript libraries and Creating a widget
- Using JavaScript libraries/frameworks
- Three types of libraries/frameworks
- DOM extension
- Application conveniences
- Widgets
- The Prototype JavaScript Framework
- Using Prototype’s Ajax Object
- Using an accordion widget to display an Ajax response
6.Working with XML feeds and Providing feedback to the user
- Working with XML News Feeds
- RSS .9x
- RSS 2.0
- RSS 1.0
- Using the Scriptaculous library for visual effects
- The yellow fade technique
- Drag and drop functionality
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