h5实现选项卡

使用HTML5和CSS实现选项卡

HTML5结合CSS可以轻松实现选项卡效果，无需JavaScript也能完成基本功能。以下是纯HTML+CSS的实现方法：

<div class="tab-container">
  <input type="radio" name="tabs" id="tab1" checked>
  <label for="tab1">选项卡1</label>
  <div class="tab-content">内容1</div>

  <input type="radio" name="tabs" id="tab2">
  <label for="tab2">选项卡2</label>
  <div class="tab-content">内容2</div>

  <input type="radio" name="tabs" id="tab3">
  <label for="tab3">选项卡3</label>
  <div class="tab-content">内容3</div>
</div>

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

.tab-container input[type="radio"] {
  display: none;
}

.tab-container label {
  padding: 10px 20px;
  background: #eee;
  cursor: pointer;
  order: 1;
}

.tab-content {
  display: none;
  padding: 20px;
  order: 2;
}

.tab-container input[type="radio"]:checked + label {
  background: #ddd;
}

.tab-container input[type="radio"]:checked + label + .tab-content {
  display: block;
}

使用JavaScript增强交互

如果需要更灵活的交互效果，可以结合JavaScript实现：

<div class="tab-container">
  <div class="tab-headers">
    <button class="tab-header active" data-tab="tab1">选项卡1</button>
    <button class="tab-header" data-tab="tab2">选项卡2</button>
    <button class="tab-header" data-tab="tab3">选项卡3</button>
  </div>

  <div class="tab-content active" id="tab1">内容1</div>
  <div class="tab-content" id="tab2">内容2</div>
  <div class="tab-content" id="tab3">内容3</div>
</div>

.tab-headers {
  display: flex;
  border-bottom: 1px solid #ddd;
}

.tab-header {
  padding: 10px 20px;
  background: none;
  border: none;
  cursor: pointer;
}

.tab-header.active {
  border-bottom: 2px solid blue;
}

.tab-content {
  display: none;
  padding: 20px;
}

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

document.querySelectorAll('.tab-header').forEach(header => {
  header.addEventListener('click', () => {
    // 移除所有active类
    document.querySelectorAll('.tab-header, .tab-content').forEach(el => {
      el.classList.remove('active');
    });

    // 添加active类到当前选项卡
    header.classList.add('active');
    const tabId = header.getAttribute('data-tab');
    document.getElementById(tabId).classList.add('active');
  });
});

响应式选项卡设计

针对移动设备优化的响应式选项卡：

@media (max-width: 768px) {
  .tab-headers {
    flex-direction: column;
  }

  .tab-header {
    text-align: left;
    border-bottom: 1px solid #eee;
  }

  .tab-header.active {
    border-bottom: 2px solid blue;
    border-left: none;
  }
}

动画效果增强

为选项卡切换添加平滑过渡效果：

.tab-content {
  opacity: 0;
  height: 0;
  overflow: hidden;
  transition: opacity 0.3s ease, height 0.3s ease;
}

.tab-content.active {
  opacity: 1;
  height: auto;
}