var productExceptSelf = function (nums) {
  const result = Array(nums.length).fill(1);
  let product = 1;

  for (let i = 0; i < nums.length; i++) {
    result[i] = result[i] * product;
    product = product * nums[i];
  }

  product = 1;

  for (let i = nums.length - 1; i >= 0; i--) {
    result[i] = result[i] * product;
    product = product * nums[i];
  }

  return result;
};