<!DOCTYPE html>
<html>
<head>
  <title>文件示例</title>
  <style>
    div {
      margin-bottom: 10px;
    }
  </style>
</head>

<body>
  <form>
    <div>
      <label for="file">选择要上传的文件</label>
      <input type="file" id="file" name="file" multiple>
    </div>
    <div>
      <button>提交</button>
    </div>
  </form>
  <script>
    const test = document.querySelector('input');
  </script>
</body>
</html>
