It allows you to write powerful, flexible, and cross-browser code with its elegant, well documented, and coherent API.
MooTools code respects strict standards and doesn't throw any warnings. It's well commented and has meaningful variable names: a joy to browse and a snap to understand.
It's compatible and fully tested with Safari, Internet Explorer 6, 7 and 8, Firefox, Opera, Chrome and Camino.
It's specifically made for server-side environments such as node.js, Rhino, SpiderMonkey and v8cgi.
- 1.4.5 brings a critical bugfix for Fx.CSS which caused many troubles for tweening and morphing your element styles.