如何将自执行函数中的构造函数暴露到全局可调用？

Question

(function(){
function Fn(){

}

Fn.prototype.method=function(){

 //some Method in Fn.prototype

}
})();

Answer 1

(function(){
    function Fn(){

    }
    Fn.prototype.method=function(){
        //some Method in Fn.prototype
    }
    window.Fn=Fn;
})();

var fn=new Fn();
console.log(typeof fn.method=="function");