Introduction This folder is mainly about navigator. More Reference Document http://mp.weixin.qq.com/s?__biz=MzU5MjY2ODEwMQ==&mid=100001380&idx=1&sn=a47ccecc71fb395618c54e1fdc2593b4&chksm=7e1d72ce496afbd8ce0e2a937d75945c73f33c29239e4c08fb492e7340e851077c21fdeefad0#rd