向导航菜单添加汉堡菜单和搜索框

<div class="navigation">
  <div class="hamburger-menu">
    <div class="hamburger-icon"></div>
  </div>
  <ul class="menu-items">
    <li><a href="#">菜单项1</a></li>
    <li><a href="#">菜单项2</a></li>
    <li><a href="#">菜单项3</a></li>
  </ul>
  <div class="search-box">
    <input type="text" placeholder="搜索">
    <button type="submit">搜索</button>
  </div>
</div>

.navigation {
  display: flex;
  align-items: center;
}

.hamburger-menu {
  display: none; /* 默认隐藏汉堡菜单 */
  cursor: pointer;
}

.hamburger-icon {
  width: 30px;
  height: 3px;
  background-color: #000;
  margin: 6px 0;
}

.menu-items {
  list-style: none;
  display: flex;
}

.menu-items li {
  margin-right: 10px;
}

.search-box {
  margin-left: auto;
}

.search-box input[type="text"] {
  padding: 5px;
  border: 1px solid #ccc;
}

.search-box button {
  padding: 5px 10px;
  background-color: #000;
  color: #fff;
  border: none;
}

const hamburgerMenu = document.querySelector('.hamburger-menu');
const menuItems = document.querySelector('.menu-items');

hamburgerMenu.addEventListener('click', function() {
  menuItems.classList.toggle('active');
});