LungoJS - Kitchen Sink. Spin.js. Example Features No images, no external CSS No dependencies (jQuery is supported, but not required) Highly configurable Resolution independent Uses VML as fallback in old IEs Uses @keyframe animations, falling back to setTimeout() Works in all major browsers, including IE6 MIT License Spin.js dynamically creates spinning activity indicators that can be used as resolution-independent replacement for AJAX loading GIFs.
In other words, it's a structure for web applications to follow in order to ensure efficiency and consistency. Many of the most popular frameworks use the MVC architecture, including ASP.NET, CodeIgniter, Zend, Django, and Ruby on Rails. At the same time, there are many web developers who don't use a coding framework yet still set up their applications to follow the MVC structure.