dependency injection with dynamic scoping

gistfile1.js

var MyClass = require("./classScope1.js");

function setter(name, value){
    eval(name+"=value");
}
MyClass.injectSetter(String(setter));
MyClass.setter('fs', {});

var myclass = new MyClass();
myclass.go2();







//***************classScope1.js
var fs = require('fs');

var MyClass = function(){
    this.value = 1;
};

MyClass.prototype.go = function(){
    console.log("hihihihi:", this.value);
};

MyClass.prototype.go2 = function(){
    console.log(fs);
};

MyClass.injectSetter = function(fn){
    eval("MyClass.setter=" + fn);
};

module.exports = MyClass;