从下拉列表中删除最后的选项 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>蜜蜂教程(mifengjc.com)</title>
  <script>
    function removeLastOption() {
      var x = document.getElementById("mySelect");
      if (x.length > 0) {
        x.remove(x.length - 1);
      }
    }
  </script>
</head>
<body>

  <form>
    <select id="mySelect">
  <option>Apple</option>
  <option>Pear</option>
  <option>Banana</option>
  <option>Orange</option>
</select>
    <input type="button" onclick="removeLastOption()" value="移除最后一个选项">
  </form>

</body>
</html>
        