Understanding Progressive Enhancement

http://alistapart.com/articles/understandingprogressiveenhancement

AJAX development – Mastering cross browser functionality

Developing for multiple browsers remains one of the biggest pain points for Ajax developers. To tackle this head on, The Ajax Experience features extensive coverage of Firefox, Internet Explorer and Google Chrome. Lets understand Ajax development and how each Ajax framework solves them.

To meet end-user demands as more clients, customers, partners and employees come to expect greater functionality and flexibility from what Ajax can deliver, in relation to:

Google Chrome: Chrome promises greater stability, speed and security than existing browsers, with a simple and efficient user interface. As a developer, what do you need to know now to tap into its potential? The Ajax Experience recently added an entire keynote on Chrome development where an expert from Google examines its features and offers tips for leveraging its fast V8 JavaScript engine.

Firefox: Firefox’s upgraded JavaScript engine, codenamed “Tracemonkey,” based on the Spidermonkey interpreter and the Tamarin-Tracing VM. Also take a look at the new JavaScript features being implemented in Mozilla’s engine to conform to the “ECMAScript Harmony” standards process, and how to take advantage of the engine’s speed and new features.

Internet Explorer 8: Microsoft keynotes on the latest enhancements to IE8′s JavaScript engine that renders it faster and more standards-compliant. Microsoft is taking steps to embrace popular open source Ajax technologies, like jQuery, Dojo and YUI.

Madhuri

AJAX Performance Design issues

Asynchronous Javascript + XML = AJAX – It is Client Server Technology, The web page is refreshed without reloading the entire page, it is the user interface with javascript. One needs expertise in html, css, javascript, DOM, asynchronous data exchange. The client in this case needs to connect to web server to facilitate the communication and data transfer.

Ajax limitations

*It is a bit slow

*End user experience is effected by the round trip behavior  as it is slower 

*if  not designed well it will affect the performance.

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