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What is AJAX Technology?

Manish Dwivedi

Manish Dwivedi

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    Ajax isn’t a technology. It’s really several technologies, each flourishing in its own right, coming together in powerful new ways.

    Ajax incorporates:
    standards-based presentation using XHTML and CSS;
    dynamic display and interaction using the Document Object Model;
    data interchange and manipulation using XML and XSLT;
    asynchronous data retrieval using XMLHttpRequest;
    and JavaScript binding everything together.

    Every user action that normally would generate an HTTP request takes the form of a JavaScript call to the Ajax engine instead. Any response to a user action that doesn’t require a trip back to the server — such as simple data validation, editing data in memory, and even some navigation — the engine handles on its own. If the engine needs something from the server in order to respond — if it’s submitting data for processing, loading additional interface code, or retrieving new data — the engine makes those requests asynchronously, usually using XML, without stalling a user’s interaction with the application.