工厂模式

let Fashi = function() {
    this.skill = "法攻";
    this.blood = 120;
    this.hit = 14;
    console.log(this)
}


let Zhanshi = function() {
    this.skill = "物攻";
    this.blood = 180;
    this.hit = 12;
    console.log(this)
}

let Tanke = function() {
    this.skill = "肉盾";
    this.blood = 280;
    this.hit = 6;
    console.log(this)
}

const Fact = {
    creator: function(role) {
        let roler;
        switch (role) {
            case "法师":
                roler = new Fashi();
                break;
            case "战士":
                roler = new Zhanshi();
                break;
            case "坦克":
                roler = new Tanke();
                break;
        }
        return roler;
    }
}
//冻结对象
Object.freeze(Fact);

var roleList = ['战士', '法师', '坦克']

roleList.forEach(function(item, idx) {
    new Fact.creator(item);
})


Zhanshi { skill: '物攻', blood: 180, hit: 12 }
Fashi { skill: '法攻', blood: 120, hit: 14 }
Tanke { skill: '肉盾', blood: 280, hit: 6 }