这是一个简易的react-animation组件，适用于仅仅只是需要处理一些简单过度动画却不想引入其他完整第三库的情况。
供参考。
使用方法
见example文件夹，及博文。
运行demo
git clone <this repo>
cd example
npm install
npm run startJoin GitHub today
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