对象属性的优先级 

 1 <!DOCTYPE html>
 2 <html>
 3 <head>
 4 <meta charset="utf-8">
 5 <meta name="viewport" content="width=device-width">
 6 <title>对象属性的优先级</title>
 7 </head>
 8 <body>
 9 
10 <script>
11 var arr = new Array();
12 arr.num=20;
13 Array.prototype.num = 10;
14 alert(arr.num)
15 </script>
16 </body>
17 </html>

 

 

posted @ 2018-10-15 13:54  johnhery  阅读(135)  评论(0)  编辑  收藏  举报