Created
September 13, 2013 02:02
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利用中间对象避免修改子类prototype时自动修改父类的prototype，实现继承。
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| <!doctype html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>JavaScript Test</title> | |
| </head> | |
| <body> | |
| </body> | |
| </html> | |
| <script> | |
| function extend (child, parent) { | |
| var F = function () {}; | |
| F.prototype = parent.prototype; | |
| child.prototype = F.prototype; | |
| child.prototype.constructor = child; | |
| } | |
| function Animal () {}; | |
| Animal.prototype.specis = "动物"; | |
| function Cat (name) { | |
| this.name = name; | |
| function getName () { | |
| return this.name; | |
| } | |
| } | |
| extend(Cat, Animal); | |
| var cat1 = new Cat("金猫"); | |
| var cat2 = new Cat("银猫"); | |
| console.log(cat1.name + " is a " + cat1.specis); | |
| console.log(cat2.name + " is a " + cat2.specis); | |
| </script> |
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