Singleton Design Pattern

var Singleton = (function(){
    var repo;
    var createRepo = function (){
        return new Object("Singleton");
    }
    var getInstance = function (){
        if(!repo){
            repo = createRepo();
        }
        return repo;
    }
    
    return {
        getInstance: getInstance
    }
}())

var s1 = Singleton.getInstance();
var s2 = Singleton.getInstance();

if(s1 === s2){
    console.log("Same")
}