In recent time Web development community had a big discussion on “DOM is slow” topic. This thesis is truthful. DOM is a quite complex model which starts a ripple of events or chain reaction over document on every modification. This impacts animations first of all. Since desktop browsers are mostly fine with handling animations at 60 FPS, mobile and embedded devices still provide bad, janky user experience.
Rotation is an everyday magic. It is an effect which can transform boring web page to a much more interactive place. Since rotation was added to CSS specification it have been deprived of attention. However a lot of cases need to rotate elements with mouse or touch. They are: roulettes, circular menus and other fancy things we still can not imagine at the moment. Propeller.js is a JavaScript library which easily enables rotation of elements with mouse or touch gestures.
