fizzBuzzCustom.js

function fizzBuzzCustom (fizz, buzz, firstDivisibility, secondDivisibility) {
  var incrementedArray = [];
  
  // Set to the argument or default to 'Fizz'
  fizz = fizz || 'Fizz';
  
  // Set to the argument or default to 'Buzz'
  buzz = buzz || 'Buzz';
  
  // Set to the argument or default to 3
  firstDivisibility = firstDivisibility || 3;
  
  // Set to the argument or default to 5
  secondDivisibility = secondDivisibility || 5;
  
  for (var i = 1; i <= 100; i++) {
    if (i % firstDivisibility === 0 && i % secondDivisibility === 0) {
      incrementedArray.push(fizz + buzz);
    } else if (i % firstDivisibility === 0) {
      incrementedArray.push(fizz);
    } else if (i % secondDivisibility === 0) {
      incrementedArray.push(buzz);
    } else {
      incrementedArray.push(i);
    }
  }
  
  return incrementedArray;
}