var Loggen = function (input) {
  this.exerList = ["test", "hi", "lol"];
  this.input = input;
};

module.exports = Loggen;

'use strict';

const Loggen = function (input) {
  this.exerList = ['test', 'hi', 'lol'];
  this.input = input;
};

module.exports = Loggen;

Adjust for strict mode