object对象 

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
    </head>
    <body>
        <script>
            
            //字面量的方式创建对象
            var obj0 = {}
            console.log(obj0)
            var obj = {
                name: "du",
                age:100,
                location: "南昌"
            }
            console.log(obj)
            
            //内置构造函数
            
            var obj2 = new Object()
            console.log(obj2)
            
            obj2.name = "xiaoming"
            obj2.age = 18
            console.log(obj2)
        </script>
    </body>
</html>
<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
    </head>
    <body>
        <script>
            var obj = {}
            console.log(obj)
            
            obj.name = "kewin"
            obj.age = 100
            obj.location = "大连"
            console. log(obj)
            
            //查
            document.write("姓名是"+obj.name)
            
            
            //改
            obj.age = 200
            console.log(obj)
            
            //删
            // obj.name = ""
            delete obj.name
            console.log(obj)
            
            //2-增
            var obj2 = {}
            // var name = "aaa"
            obj2["name"] = "Du"
            console.log(obj2)
            
            //2-查
            console.log(obj2["name"])
            
            
            //3-改
            
            obj2["name"] = "du22"
            console.log(obj2)
            
            //2-删除
            delete obj2["name"]
            console.log(obj2)
        </script>
    </body>
</html>

 

posted @ 2023-12-18 15:10  奇迹会出现  阅读(11)  评论(0)    收藏  举报