const max = 100 let FizzBuzz = function* (){ let num = 1; while (num <= max) { let value = num; num++; if (value % 15 === 0) { value = 'WizeServices'; } else if (value % 3 === 0) { value = 'Wize'; } else if (value % 5 === 0) { value = 'Services'; } yield value; } }(); for (var n of FizzBuzz) { console.log(n); }