fizz_buzz.js

var fizz_buzz = {
  
  range : {
    begin :   1,
    end   : 100,
  },
  
  test : function(target_value, test_value) {
    return target_value % test_value === 0;
  },

  test_sets : [
    { value: 3, word: 'Fizz!', },
    { value: 5, word: 'Buzz!', },
  ],
  
};

for(var n = fizz_buzz.range.begin; n <= fizz_buzz.range.end; n = n + 1) {
  
  var words = '';
  
  for(var key in fizz_buzz.test_sets) {
    
    var test = fizz_buzz.test_sets[key];

    if ( fizz_buzz.test(n, test.value) )
      words = words + test.word;
  }
  
  if ( words === '' )
    words = String(n);
  
  console.log('n:' + n + ' "' + words + '"');
  
}