AJAXDavis Dai

Introduction

Acronym for “asynchronous JavaScript and XML”

Combination of various technologies Was not developed as an official

standardIt came to be as a way of thinking about the

architecture of web applications utilizing certain technologies

History

2003 – Idea first conceived by Greg Aldridge

2005 – Termed AJAX by Jesse James Garrett

2006 – OpenAjax Initiative 2006 – OpenAjax Alliance

OpenAjax Alliance

Began as the OpenAjax Initiative Industry group formed to facilitate

developmentMainly addressing issues that require

coordination among AJAX-using organizations

Voluntary contribution

Specs – Composition

Presentation – X/HTML and CSS Dynamic display of and interaction with

data – Document Object Model (DOM) Interchange of data – XML Manipulation and display of data – XSLT Asynchronous communication –

XMLHttpRequest Central link – JavaScript

Specs – Presentation

X/HTML CSS

Specs – DOM Cross-platform Language-

independent Convention for

representing and interacting with objects in X/HTML and XML documents

Specs – XML

Specs – XSLT Extensible

Stylesheet Language Transformations

Transforms XML into XHTML or other XML documents

Specs – XMLHttpRequest

Communicate with server from inside web pageUpdate web page with new data without

reloadRequest and receive new data from server

after page loadCommunicate with server in background

Specs – JavaScript

JavaScript Java

Dynamic and interactive web (site/app) development.

Mainly used for:

AjaxDaddyw3schools.com AJAX Example

Examples

Advantages

Interoperability Usability Speed Reduced network/server load

Disadvantages

Implementation/ Maintainability Privacy/Security

Conclusion

Good Idea Will remain in practice for a long time