constructorPattern.js

function myThing(){
  if(!(this instanceOf myThing)){
    return new myThing();
  }
  var private = 'blah';
  var api = this;
  api.methodOne = function(params){
    if(private){
      //...
    }
  };
  api.methodTwo = function(params){
    var something = api.methodOne(stuff);
    //...
  };
}

Constructor pattern (compared to module)