如何使搜索框出现在我的导航栏中？

<nav>
  <ul>
    <li><a href="#">首页</a></li>
    <li><a href="#">产品</a></li>
    <li><a href="#">关于我们</a></li>
    <li>
      <form>
        <input type="text" placeholder="搜索">
        <button type="submit">搜索</button>
      </form>
    </li>
  </ul>
</nav>

nav {
  background-color: #f2f2f2;
  padding: 10px;
}

nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  display: flex;
}

nav ul li {
  margin-right: 10px;
}

nav form {
  display: flex;
}

nav input[type="text"] {
  padding: 5px;
  border: none;
  border-radius: 3px;
}

nav button[type="submit"] {
  padding: 5px 10px;
  background-color: #007bff;
  color: #fff;
  border: none;
  border-radius: 3px;
}

const searchInput = document.querySelector('input[type="text"]');
const searchButton = document.querySelector('button[type="submit"]');

searchButton.addEventListener('click', function(event) {
  event.preventDefault();
  const searchTerm = searchInput.value;
  // 执行搜索操作或其他操作
});