js 组件的写法

var Test1 = function(){
        var name = "";
        this.setName = function(username){
            name = username;
        }
        this.getName = function(){
            return name;
        }
        this.sayHello = function(){
            return "Hello " + this.getName();
        }
        return this;
    }();
    Test1.setName("penngo");
    console.log("Test1======" + Test1.getName());
    console.log("Test1======" + Test1.sayHello());

    // 第二种
    var Test2 = function(){
        var name = "";
        return {
            setName:function(username){
                name = username;
            },
            getName:function(){
                return name;
            },
            sayHello:function(){
                return "Hello " + this.getName();
            }
        };
    }();
    Test2.setName("penngo");
    console.log("Test2======" + Test2.getName());
        console.log("Test2======" + Test2.sayHello());