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

}