facade.js

function api(services){
  
  function getUser(){
      return services.user.get();
  }
  function getName(){
      return services.user.getName();
  }
  function play(){
      services.mediator.trigger('media.play')
  }
  return {
    getUser:getUser,
    getName: getName,
    play: play
  }
}

window.appnameSpace = api({
    user:require('user'),
    mediator:require('mediator')
});

factory.js

var constructor = function(params) {
    var user = {
        name: params.name
    };
    function get() {
        return user;
    }
    function getName(){
        return user.name;
   }
   function set(_user_) {
        user = _user_
   }
   return {
      get : get,
      getName: getName,
      set : set
   };
};

var module = constructor;
var instance = module({name:"bob"});

mediator.js

var playButton = function(mediator){
    var button = document.createElement("BUTTON");
    var state = 'playing';
    button.innerHTML = 'Pause';
    
    mediator.on('media.playing', function(){
      button.innerHTML = 'Pause';
    })
    mediator.on('media.paused', function(){
        button.innerHTML = 'Play';
    })
    button.onclick = function(){
        if(state !== 'playing'){
            mediator.trigger('media.play')
        } else {
            mediator.trigger('media.pause')
        }
    }
}
module.exports = playButton;

module.js

var MyModule = function(params) {
   function myMethod() {
      alert( 'my method' );
   }
   function myOtherMethod() {
      alert( 'my other method' );
   }
   // explicitly return public methods when this object is instantiated
   return {
      someMethod : myMethod,
      someOtherMethod : myOtherMethod
   };
};

module.exports = MyModule;

singleton.js

var constructor = function() {
    var user = {
        name: "bob"
    };
   function get() {
        return user;
   }
   function getName(){
        return user.name;
   }
   function set(_user_) {
        user = _user_
   }
   return {
      get : get,
      getName: getName,
      set : set
   };
};

var module = constructor();
var instance = module;