递归深拷贝

const obj = {   name:'测试',   age:'25',   address:{    name:'杭州'   },   arr:['a','b','c'] } const obj1=cloneDeep(obj) function cloneDeep(obj) { //存放数据   var newobj = obj instanceof Array?[]:{} //进入循环   for(var k in obj){     if(typeof obj[k] === 'object'){       newobj[k]=cloneDeep(obj[k])     }else{       newobj[k] = obj[k]     }   }   return newobj }