Let”s now look at what Prototype can do specifically for us to develop a Dynamic Web Application.

Cross Browser Support

While doing JavaScript programming, it is required to handle different Web Browsers differently. Prototype Library has been written in such a way that it takes care of all the compatibility issues and you can do cross browser programming without any hassle.

The Document Object Model

Prototype provides helper methods that ease some of the strain of DOM programming. Using Prototype, you can manipulate DOM very easily.

HTML Forms

With Ajax, other input mechanisms such as drag and drop, can be used as part of a conversation between the browser and the server. With conventional JavaScript programming, it is difficult to capture these inputs and pass them to the server. Prototype provides a set of utilities for working with HTML forms.

JavaScript Events

Prototype provides some excellent cross-browser support while coding events, and also extends the Function object to make it easy to work with event handling.

Ajax Utilities

The most important feature of Prototype is it”s support for Ajax. All major browsers support a version of the XMLHttpRequest object that makes Ajax possible, either as an ActiveX component or as a native JavaScript object.

XMLHttpRequest, however, exposes the HTTP protocol at a very low level, which gives the developer a lot of power, but also requires her to write a lot of code in order to do simple things.

Prototype uses it”s own object inheritance system to provide a hierarchy of Ajax helper objects, with more generic base classes being subclassed by more focused helpers that allow the most common types of Ajax request to be coded in a single line.