function Father(name) { this.name = name ; this.getName = function () { return this.name; } } function Son(name,age) { this._newMethod = Father; this._newMethod(name); delete this._newMethod; this.age = age; this.getAge = function () { return this.age; } } var father = new Father("Tom"); var son = new Son("Jack",18); console.log(father.getName());//Tom console.log(son.getName());//Jack//继承父类getName()方法 console.log(son.getAge());//18
多继承（利用对象冒充可以实现多继承）
function FatherA(name) { this.name = name ; this.getName = function () { return this.name; } } function FatherB(job) { this.job = job; this.getJob = function () { return this.job; } } function Son(name,job,age) { this._newMethod = FatherA; this._newMethod(name); delete this._newMethod; this._newMethod = FatherB; this._newMethod(job); delete this._newMethod; this.age = age; this.getAge = function () { return this.age; } } var fatherA = new FatherA("Tom"); var fatherB = new FatherB("Engineer"); var son = new Son("Jack","Programmer",18); console.log(fatherA.getName());//Tom console.log(fatherB.getJob());//Engineer console.log(son.getName());//Jack//继承父类FatherA的getName()方法 console.log(son.getJob());//Programmer//继承父类FatherB的getJob()方法 console.log(son.getAge());//18
call()方法
function Father(name) { this.name = name ; this.getName = function () { return this.name; } } function Son(name,job,age) { Father.call(this,name); this.age = age; this.getAge = function () { return this.age; } } var father = new Father("Tom"); var son = new Son("Jack","Programmer",18); console.log(father.getName());//Tom console.log(son.getName());//Jack//继承父类getName()方法 console.log(son.getAge());//18
多继承（利用call()方法实现多继承）
function FatherA(name) { this.name = name ; this.getName = function () { return this.name; } } function FatherB(job) { this.job = job; this.getJob = function () { return this.job; } } function Son(name,job,age) { FatherA.call(this,name); FatherB.call(this,job); this.age = age; this.getAge = function () { return this.age; } } var fatherA = new FatherA("Tom"); var fatherB = new FatherB("Engineer"); var son = new Son("Jack","Programmer",18); console.log(fatherA.getName());//Tom console.log(fatherB.getJob());//Engineer console.log(son.getName());//Jack//继承父类FatherA的getName()方法 console.log(son.getJob());//Programmer//继承父类FatherB的getJob()方法 console.log(son.getAge());//18
apply()方法
function Father(name) { this.name = name ; this.getName = function () { return this.name; } } function Son(name,job,age) { Father.apply(this,new Array(name)); this.age = age; this.getAge = function () { return this.age; } } var father = new Father("Tom"); var son = new Son("Jack","Programmer",18); console.log(father.getName());//Tom console.log(son.getName());//Jack//继承父类getName()方法 console.log(son.getAge());//18
多继承（利用apply()方法实现多继承）
function FatherA(name) { this.name = name ; this.getName = function () { return this.name; } } function FatherB(job) { this.job = job; this.getJob = function () { return this.job; } } function Son(name,job,age) { FatherA.apply(this,new Array(name)); FatherB.apply(this,new Array(job)); this.age = age; this.getAge = function () { return this.age; } } var fatherA = new FatherA("Tom"); var fatherB = new FatherB("Engineer"); var son = new Son("Jack","Programmer",18); console.log(fatherA.getName());//Tom console.log(fatherB.getJob());//Engineer console.log(son.getName());//Jack//继承父类FatherA的getName()方法 console.log(son.getJob());//Programmer//继承父类FatherB的getJob()方法 console.log(son.getAge());//18
原型链方法
function Father() { } Father.prototype.name = "Tom"; Father.prototype.getName = function () { return this.name; }; function Son() { } Son.prototype = new Father(); Son.prototype.age = 18; Son.prototype.getAge = function () { return this.age; }; var father = new Father(); var son = new Son(); console.log(father.getName());//Tom console.log(son.getName());//Tom//继承父类FatherA的getName()方法 console.log(son.getAge());//18
混合方式（call()+原型链）