BetweenJS 是一个 JavaScript 的渐变效果实现引擎。
BetweenJS is Tweening Engine for JS.Highly inspired from BetweenAS3.Creates a Tween and apply it with an immediate effect, accurate for setting desired values in the time-range of the tween.
项目主页：https://github.com/sazaam/BetweenJS
来自:开源中国社区
