JS一些用法

js跳出循环的方法区别(break,continue,return)
https://blog.csdn.net/fxss5201/article/details/52980138

js获取对象的属性个数
https://www.cnblogs.com/ooo0/p/6534333.html

var obj = {  
    key1: 1,  
    key2: 2,  
    key3: 3  
};  
      
Object.getOwnPropertyNames(obj).length
Object.keys(obj).length

微信小程序之本地缓存(十)
https://www.cnblogs.com/nosqlcoco/p/6231809.html