*The code compiles one-to-one into the equivalent JS, and there is no interpretation at runtime. * You can use any existing JavaScript library seamlessly from CoffeeScript (and vice-versa). *The compiled output is readable and pretty-printed, will work in every JavaScript runtime, and tends to run as fast or faster than the equivalent handwritten JavaScript.

* Simplify the possibilities for navigating within a document, selecting DOM elements particularly effective manner, creating animations, event handling and Ajax-based applications. * Allows creating of plug-ins over the JavaScript library which allows developers to create an abstraction for interactions, animations low level, effects and widgets levels. * JQuery's modular approach enables the creation of dynamic Web pages and powerful web applications easily.