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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

    <head>

        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />

        <title>Untitled Document</title>

        <script type="text/javascript">

        var a={

            af:function(){

                console.log(this);

            },

            b:{

                bb:function(){

                    console.log(this);

                }


},

            c:{

                cc:{

                    cccf:function(){

                        console.log(this);

                    }

                }

            }

        }

        a.b.bb();//这里this指向的时b

        a.b.bb.call(Window);//this指向的是Window

        a.b.bb.call(a);//this指向的时a


</script>

    </head>


<body>

    </body>

</html>

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时间： 2024-10-08 15:05:53