微信小程序实例源码大全下载:https://www.cnblogs.com/tuyile006/p/6268961.html
typeof用法:https://www.jianshu.com/p/8107d25f54ac
onload与onlauch区别:https://www.jianshu.com/p/aaf65625fc9d
微信小程序的wx.getStorageSync中的key使用参数传递:https://blog.csdn.net/yehuaner33/article/details/83273762