CodeBattleのFizzBuzzで書いた変態回答。最新の狐のscript[type=application/javascript;version=1.7]が必要。

fizzbuzz_meets_js1.7.js

var Range = function(start, end) {
  [this.start, this.end] = start <= end ? [start, end] : [end, start];
};

Range.prototype.__iterator__ = function() {
  for (var i = this.start; i <= this.end; i++) yield i;
};

for (var i in new Range(1, 100)) {
  console.log(i % 3 ? i % 5 ? i : 'Buzz' : i % 5 ? 'Fizz' : 'FizzBuzz');
}