JavaScript里没有继承关键字，想要继承一个类需要用到“对象冒充”。
1 <!DOCTYPE html>
2 <html xmlns="http://www.w3.org/1999/xhtml">
3 <head>
4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
5 <title>对象冒充</title>
6 </head>
7 <body>
8 <script type="text/javascript">
9 function Animal(name, age) {
10 this.name = name;
11 this.age = age;
12 this.shout = function () {
13 alert("嘎嘎!");
14 }
15 }
16 function Dog(name, age) {
17 //把Animal构造函数赋给this.aaa
18 this.aaa = Animal;
19 //运行调用！！
20 this.aaa(name,age);
21 }
22 var dog = new Dog("小黑", 3);
23 alert(dog.name);
24 //方法也能继承
25 dog.shout();
26 </script>
27 </body>
28 </html>
时间： 2024-10-11 20:01:27