如何在用户离开选择框时触发函数？

<select onblur="myFunction()">
  <option value="1">Option 1</option>
  <option value="2">Option 2</option>
  <option value="3">Option 3</option>
</select>

<select id="mySelect">
  <option value="1">Option 1</option>
  <option value="2">Option 2</option>
  <option value="3">Option 3</option>
</select>

<script>
  var selectBox = document.getElementById("mySelect");
  selectBox.addEventListener("blur", myFunction);

  function myFunction() {
    // 执行需要的操作
  }
</script>

<select id="mySelect">
  <option value="1">Option 1</option>
  <option value="2">Option 2</option>
  <option value="3">Option 3</option>
</select>

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script>
  $("#mySelect").blur(function() {
    // 执行需要的操作
  });
</script>