寄生组合式继承

//寄生组合式继承 解决方案：通过借用构造函数来继承属性； //通过原型链来继承方法。不必为了指定子类型的原型而调用超类型的构造函数，

function inheritPrototype(subType, superType) {
  let protoType = Object.create(superType.prototype); //创建对象
  protoType.constructor = subType; //增强对象
  subType.prototype = protoType; //指定对象
}
function SuperType(name) {
  this.name = name;
  this.colors = ["red", "blue", "green"];
}
SuperType.prototype.sayName = function () {
  console.log(this.name); // Bob
};

function SubType(name, age) {
  SuperType.call(this, name);
  this.age = age;
}

inheritPrototype(SubType, SuperType);
SubType.prototype.sayAge = function () {
  console.log(this.age); // 18
};
let instance = new SubType("Bob", 18);
instance.sayName();
instance.sayAge();