如何只传递某些表单值

<form id="myForm">
 <input type="text" name="field1" placeholder="Field 1">
 <input type="text" name="field2" placeholder="Field 2">
 <input type="text" name="field3" placeholder="Field 3">
 <button type="submit">Submit</button>
</form>

document.getElementById("myForm").addEventListener("submit", function(event) {
  event.preventDefault(); // 阻止表单的默认提交行为

  // 获取要传递的特定输入字段
  const field1 = document.getElementsByName("field1")[0].value;
  const field3 = document.getElementsByName("field3")[0].value;

  // 创建一个FormData对象，并添加要传递的输入字段值
  const formData = new FormData();
  formData.append("field1", field1);
  formData.append("field3", field3);

  // 使用fetch API发送POST请求，并传递FormData对象
  fetch("https://your-api-url.com/submit", {
    method: "POST",
    body: formData
  })
    .then(response => response.json())
    .then(data => console.log(data))
    .catch(error => console.error(error));
});