深拷贝对象 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        let obj = {
            name: "adf",
            age: "21",
            fn :function (){
                console.log("fn");
            }
        }
        function deepcopy(obj){
            let newobj = Array.isArray(obj)?[]:{}
            for(let key in obj){
                if(obj.hasOwnProperty(key)){
                    if(typeof obj[key] ==="object"){
                        newobj[key] = deepcopy(obj[key])
                    }else{
                        newobj[key] = obj[key];
                    }
                }
            }
            return newobj
        }

        let newobj = deepcopy(obj);
        newobj.name = "asdad";
        console.log(obj);
        console.log(newobj);
    </script>
</body>
</html>

实现子类与父类的继承

posted @ 2021-03-26 10:23  想学前端的小李  阅读(28)  评论(0)    收藏  举报