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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script>
//先定义几种车 构造函数 工厂方法
function Car(options) {
this.doors = options.doors || 4;
this.state = options.state || "brand";
this.color = options.color || "silver";
}
function Truck(options) {
this.state = options.state || "used";
this.wheelSize = options.wheelSize || "large";
this.color = options.color || "blue";
}
//再定义生产车辆的工厂
function VehicleFactory() {}
//定义该工厂生产的默认汽车类型
VehicleFactory.prototype.vehicleClass = Car; //Car是函数
//定义生产汽车的具体过程
VehicleFactory.prototype.createVehicle = function(options) {
if(options.vehicleType === "car"){
this.vehicleClass = Car;
}else{
this.vehicleClass = Truck;
}
return new this.vehicleClass(options);
};
//建造工厂并命名
var carFactory = new VehicleFactory();
//开始生产汽车
var car = carFactory.createVehicle({
vehicleType: "car",
color: "yellow",
doors: 6
});
//验证车是否是这个Car类型的车
console.log(car instanceof Car);
//验验车，看看货
console.log(car);
//再生产另一部车
var movingTruck = carFactory.createVehicle({
vehicleType: "truck",
state: "like new",
color: "red",
wheelSize: "small"
});
//验证车是否是Track类型的车
console.log(movingTruck instanceof Truck);
//验验车，看看货
console.log(movingTruck);
//-----------------------------------------------
//定义第二个工厂 是上面那个工厂的子工厂
function TruckFactory() {}
TruckFactory.prototype = new VehicleFactory();
TruckFactory.prototype.vehicleClass = Truck;
//创建工厂
var TruckFactory = new TruckFactory();
//生产卡车
var myBigTruck = TruckFactory.createVehicle({
state: "omg..so bad.",
color: "pink",
wheelSize: "so big"
});
//验验车
console.log(myBigTruck instanceof Truck);
//看看货
console.log(myBigTruck);
</script>
</body>
</html>
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