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>
