JavaScript 面向对象的编程（三） 类的继承

//声明父类
function SuperClass(){
    this.superValue = true;
}

//为父类添加共有方法
SuperClass.prototype.getSuperValue=function(){
    return this.superValue;
}

//声明子类
function SubClass(){
    this.subValue = false;
}

//继承父类
SubClass.prototype = new SuperClass();
SubClass.prototype.getSubValue = function(){
    return this.subValue;
}

var instance = new SubClass();
console.log(instance.getSuperValue());
console.log(instance.getSubValue());

  console.log(instance instanceof SuperClass);
  console.log(instance instanceof SubClass);
  console.log(SubClass instanceof SuperClass);
  console.log(SubClass.prototype instanceof SuperClass);
  console.log(instance instanceof Object);