![]() Javascript doesn't directly support class types nor class-based inheritance in the same way as C++ and Java. Here we go through these four areas in more detail with examples to give a sense of the power of this library. Inheritance, Ajax, Event Observation and DOM extensions are four major parts of prototype that make it increadibly useful. Both prototype and are built into the Ruby on Rails web development framework. It is the basis of the popular javascript effects and animations library. Prototype was one of the earlier Javascript libraries that has quickly become one the of most popular libraries for front end Javascript development. Prototype provides superior and consistent APIs for DOM manipulation, AJAX, event handling, class-based inheritance, enumeration handling and much more. The two advantages it provides over plain javascript are: an improved set of default methods on objects, and cross-browser compatibility. In essence Prototype is a collection of utility methods and extensions to default Javascript objects. "Prototype is a JavaScript Framework that aims to ease development of dynamic web applications" ( ).
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