手动实现深拷贝

手动实现深拷贝

function deepCopy(oldObj,newObj){
  var newObj=newObj||{};
  for(var key in oldObj){
      debugger
    if(typeof oldObj[key]==='object'){
      if(oldObj[key].constructor  === Array){
        //这是数组
        newObj[key]=[];
      }else{
        //这是对象
        newObj[key]={};
      }
      deepCopy(oldObj[key],newObj[key]);
       
    }else{
      newObj[key]=oldObj[key];
    }
  }
  return newObj;
}
let obj = {name:'乔巴',type:{name:'驯鹿'},age:'18'}
let deepObje = deepCopy(obj,{})