Inside the ASP.NET Ajax Client Framework

The ASP.NET Ajax client framework is essentially comprised of a set of JavaScript files that form part of a library commonly called the Microsoft Ajax Library. The major components that are included in this library are the following:

1. The Component Layer
2. The Core Services Layer
3. The Browser Compatibility Layer

The Core Component Layer
The Component Layer is comprised of a set of nonvisual components that provide support for asynchronous communication, networking, localization, XML and JSON serialization, ASP.NET application services, and so on.

The Core Services Layer
The Core Services Layer contains the ASP.NET Ajax Base Class Library and its extensions, which facilitate object-oriented programming and an extension to the existing JavaScript types.

The Browser Compatibility Layer
The Browser Compatibility Layer is responsible for providing cross-browser support for Ajax-enabled web pages—that is, support for browsers such as IE, Mozilla, Firefox, and so on.