var?Beverage?=?function(){}
Beverage.prototype.boilWater?=?function(){
	console.log("煮沸水");
};

Beverage.prototype.brew?=?function(){
	//?console.log("沖泡飲料");
	throw?new?Error("子類必須重寫該方法");
};

Beverage.prototype.putInCup?=?function(){
	//?console.log("倒進杯中");
	throw?new?Error("子類必須重寫該方法");
};

Beverage.prototype.addCondiments?=?function(){
	//?console.log("添加輔料");
	throw?new?Error("子類必須重寫該方法");
};
Beverage.prototype.customIsWant?=?function(){
	//?演示鉤子方法
	return?true;
}
Beverage.prototype.init?=?function(){
	this.boilWater();
	this.brew();
	this.putInCup();
	if(this.customIsWant()){
		this.addCondiments();
	}
}

var?Coffee?=?function(){}

Coffee.prototype.brew?=?function?()?{
??console.log("用開水沖泡咖啡");
}
Coffee.prototype.putInCup=?function?()?{
??console.log("把咖啡倒進杯子里");
}
Coffee.prototype.addCondiments=?function?()?{
??console.log("加糖和牛奶");
}
Coffee.prototype.customIsWant?=?function(){
	return?false;
}

var?Tea?=?function(){}

Tea.prototype.brew?=?function?()?{
??console.log("用開水沖泡茶");
}
Tea.prototype.putInCup=?function?()?{
??console.log("把茶倒進杯子里");
}
Tea.prototype.addCondiments=?function?()?{
??console.log("加檸檬");
}
Tea.prototype.customIsWant?=?function(){
	return?window.confirm("請問需要加檸檬嗎？");
}

//?js的繼承
Coffee.prototype?=?new?Beverage();?

Tea.prototype?=?new?Beverage();

var?coffee?=?new?Coffee();
console.log(coffee.brew());
coffee.init();

var?tea?=?new?Tea();
tea.init();