Mithril is a marvelously tiny JavaScript library by Leo Horie. The functionality it provides works best when it is used as a complete framework. I found the fundamentals of Mithril’s rendering system to be a challenge to my basic assumptions about how a JavaScript application works. I think playing with real, running code is the best way to undertsand it.
Mithril.js is a small (7kb) and fast, classical MVC JavaScript framework. It encourages an architecture similar to Angular.js, and uses a virtual DOM like React.js, all while avoiding the need for libraries like jQuery. Mithril's small size and API makes it ideal for embedded JavaScript widgets and user interfaces that have high performance requirements.