<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>继承的另一种写法</title> <script> var Animal = function () {}; Animal.prototype.breath = function () { console.log('breath'); }; var Dog = function () {}; // Dog 继承了 Animal Dog.prototype = new Animal; Dog.prototype.wag = function () { console.log('wag tail'); }; var dog = new Dog; dog.wag(); dog.breath(); // 继承的属性 </script> </head> <body> </body> </html>