JavaScript 関数から `undefined` を返すか `null` を返す方がよいでしょうか? 質問する

私が書いた関数は基本的に次のようになります:

function getNextCard(searchTerms) {
  // Setup Some Variables

  // Do a bunch of logic to pick the next card based on termed passed through what I'll call here as 'searchTerms' all of this logic is omitted because it's not important for my question.
  // ...

  // If we find a next card to give, than give it
  if (nextCardFound)
    return nextCardFound;

  // Otherwise - I'm returning undefined
  return undefined;
}