如何知道单选按钮未选中？

<form id="myForm">
  <input type="radio" name="option" value="A"> Option A
  <input type="radio" name="option" value="B"> Option B
  <input type="radio" name="option" value="C"> Option C
</form>

<script>
  function isRadioButtonUnchecked() {
    const radioButtons = document.querySelectorAll('input[name="option"]');
    for (let radioButton of radioButtons) {
      if (!radioButton.checked) {
        return true;
      }
    }
    return false;
  }

  console.log(isRadioButtonUnchecked()); // 输出: true 或 false
</script>

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<form id="myForm">
  <input type="radio" name="option" value="A"> Option A
  <input type="radio" name="option" value="B"> Option B
  <input type="radio" name="option" value="C"> Option C
</form>

<script>
  function isRadioButtonUnchecked() {
    return $('input[name="option"]:not(:checked)').length > 0;
  }

  console.log(isRadioButtonUnchecked()); // 输出: true 或 false
</script>