如何从下拉列表中填充表单值？

<select id="dropdown">
  <option value="1">选项1</option>
  <option value="2">选项2</option>
  <option value="3">选项3</option>
</select>

const dropdown = document.getElementById("dropdown");

function fillForm(value) {
  const form = document.getElementById("form");

  // 根据表单字段名称，设置对应元素的值
  switch (form.getName()) {
    case "name":
      form.querySelector("#name-input").value = value;
      break;
    case "email":
      form.querySelector("#email-input").value = value;
      break;
    case "address":
      form.querySelector("#address-input").value = value;
      break;
    // ...其他表单字段处理
  }
}

dropdown.addEventListener("change", function () {
  fillForm(this.value);
});