counter.js

define(['./logger'], 
  function (logger) {
    var 
      _c = 0,
      increment = function () {
        logger.log("incrementing counter to " + ++_c);
        return _c;
      },
      decrement = function() {
        logger.log("decrementing counter to " + --_c);
        return _c;
      },
      reset = function() {
        logger.log("reseting counter");
        return (_c = 0);
      };

    return {
      increment : increment,
      decrement : decrement,
      reset : reset
    };
});