JavaScript的寄生组合式继承

寄生组合式继承示例

第一篇博客，留个纪念

//父类构造函数function Super(name){    this.name = name;    this.funcName = "Super";    this.func = "super";}Super.prototype.sayName = function (){ alert(this.name); }Super.prototype.sayFuncName = function (){ alert(this.funcName); }//子类构造函数function Sub(name,age){    Super.call(this,name);    this.age = age;    this.funcName = "Sub";}//继承函数function inheritPrototype(Sub,Super){    //中间实例化对象    var a = Object(Super.prototype);    //重写该对象的构造函数指针，指向Sub函数    a.constructor = Sub;    //Sub的原型指向实例化对象a    Sub.prototype = a;}//调用继承函数，实现原型链构造inheritPrototype(Sub,Super);/*----------一定要在调用继承函数之后添加，如果放在继承函数之前，随着原型的替换，函数会undefined。----------*///添加子类方法Sub.prototype.sayAge = function (){ alert(this.age); }Sub.prototype.sayFuncName = function (){ alert(this.funcName); }//测试代码var subTest = new Sub("lulu",20);subTest.sayName(); //lulusubTest.sayAge(); //20subTest.sayFuncName(); //Subalert(subTest.func); //super