js实现深复制代码分享

function deepClone(data1,data2){
 var data2 = data2 || {}; //局部变量data2赋初值为接收的参数或者为一个空对象。
 for(var key in data1){ if(typeof data1[key] === 'object'){ //依次判断data1对象的属性是不是对象
 data2[key] = (data1[key].constructor===Array) ? [] : {} //判断要复制的项是对象还是数组
 deepClone(data1[key],data2[key]); //递归实现
 }else {
 data2[key] = data1[key] //如果不是的可以直接相等
 }
 } return data2;
 } var json = {"name":"小倪子麻麻","age": "20",arr1:[2,3,4,5]}; var json1 = {};
 json1 = deepClone (json,json1);
 json.arr1.pop();
 console.log(json); //{"name":"小倪子麻麻","age": "20",arr1:[2,3,4]};
 console.log(json1);//{"name":"小倪子麻麻","age": "20",arr1:[2,3,4,5]};