常用的设计模式

常用的设计模式
`

        let TankFactor = {
        tankList: {
            "01": function() {
                const img = new Image(); 
                img.src = "./images/01.jpg";
                return img;
            },
            "02": function() {
                const img = new Image(); // 创建一张图片
                img.src = "./images/02.jpg";
                return img;
            },
            "03": function() {
                const img = new Image(); 
                img.src = "./images/03.jpg";
                return img;
            },
            "04": function() {
                const img = new Image(); 
                img.src = "./images/04.jpg";
                return img;
            }
        },
        create: function(type) { // 通过create来创建坦克 
            let info = this.tankList[type]();    // this.tankList['01']
            return info;
        }
    }
    let v1 = TankFactor.create('02');
    document.body.appendChild(v1);