Echo JS 0.11.0

I am totally confused by the article.
I use factory functions all the time and they are as old as JavaScript.
Definitely nothing to with ES6+ 
Instead they benefit from the closure concept

function createTimer() {
   var count = 0;
   return {
      inc : function() { count++; },
      getCount : function() { return count; }, 
      reset :    function() { count = 0; } 
   };
}