data() {
  return {
    items: [
      { id: 1, name: 'item 1', active: false },
      { id: 2, name: 'item 2', active: false },
      { id: 3, name: 'item 3', active: false },
      // 其他li元素数据...
    ]
  }
}

<ul>
  <li v-for="item in items" :key="item.id" :class="{ active: item.active }" @click="toggleActive(item)">
    {{ item.name }}
  </li>
</ul>

methods: {
  toggleActive(item) {
    item.active = !item.active;
  }
}