The subject I chose from the p5 library is the p5.play. This is a javascript mostly for animation. It provides classes for the object in 2D spaces. It doesn’t support 3D and events. But it is simple and easy to use. All in all it is really helpful for those people who want to make animation using javascript. 

p5.play:http://molleindustria.github.io/p5.play/

some interesting examples:http://molleindustria.github.io/p5.play/examples/index.html#