如何确保幻灯片选项卡在html中显示3个选项卡

<div class="tabs-container">
  <ul class="tab-nav">
    <li class="active">选项卡1</li>
    <li>选项卡2</li>
    <li>选项卡3</li>
  </ul>
  <div class="tab-content">
    <div class="tab-pane active">选项卡1的内容</div>
    <div class="tab-pane">选项卡2的内容</div>
    <div class="tab-pane">选项卡3的内容</div>
  </div>
</div>

.tabs-container {
  display: flex;
  flex-direction: column;
}

.tab-nav {
  display: flex;
  justify-content: space-between;
  list-style: none;
  padding: 0;
  margin: 0;
}

.tab-nav li {
  flex: 1;
  text-align: center;
  padding: 10px;
  background-color: #f0f0f0;
  cursor: pointer;
}

.tab-nav li.active {
  background-color: #ccc;
}

.tab-content {
  border: 1px solid #ccc;
  padding: 10px;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

// 获取选项卡元素
const tabNavItems = document.querySelectorAll('.tab-nav li');
const tabPanes = document.querySelectorAll('.tab-pane');

// 为每个选项卡添加点击事件监听器
tabNavItems.forEach((item, index) => {
  item.addEventListener('click', () => {
    // 移除所有选项卡的active类
    tabNavItems.forEach((navItem) => {
      navItem.classList.remove('active');
    });
    tabPanes.forEach((pane) => {
      pane.classList.remove('active');
    });

    // 添加当前选项卡的active类
    item.classList.add('active');
    tabPanes[index].classList.add('active');
  });
});