首先明确:
1、任何对象都有属性[[Prototype]];
2、只有函数有属性prototype。
Pet为父类,子类Dog继承Pet。示意图如下:
继承的样例代码:
// 父类构造函数 function Pet(name,sound){ var name = name; this.sound = "Pet says " + sound; this.getName = function(){ console.log(name); }; } // 父类原型 Pet.prototype.voice = function(){ console.log(this.sound); } // 子类 function Dog(sound){ this.sound = "Dog syas " + sound; } // 继承 Dog.prototype = new Pet("pet","ohooo"); Dog.prototype.constructor = Dog; // 继承验证 var dog = new Dog("wangwang"); dog.voice();//Dog syas wangwang dog.getName();//pet
Firefox中的显示如下: