表单的action属性是做什么的？如何指定表单提交的URL？

action

action

<form>

action

<form action="/submit-form" method="post">
  <!-- 表单内容 -->
  <input type="text" name="username">
  <input type="password" name="password">
  <button type="submit">提交</button>
</form>

/submit-form

method

get

post

action

<form action="" method="post">

action

<form id="myForm" action="/default-submit" method="post">
  <!-- 表单内容 -->
  <input type="text" name="username">
  <button type="submit">提交</button>
</form>

<script>
  const form = document.getElementById('myForm');
  form.addEventListener('submit', function(event) {
    // 阻止默认的表单提交行为
    event.preventDefault();

    // 根据某些条件修改 action 属性
    if (form.username.value === 'admin') {
      form.action = '/admin-submit';
    } else {
      form.action = '/user-submit';
    }

    // 提交表单
    form.submit();
  });
</script>

submit

username

action

form.submit()

action

https://example.com/products/details