const activeIndex=Vue.ref(0); // console.log(activeIndex.valuea); function toggleActive(index){ if(activeIndex.value===index){ activeIndex.value=null; }else{ activeIndex.value=index; console.log(activeIndex); console.log(activeIndex.value); } const lis =document.querySelectorAll(".clearfix li") for(let i=0;i<lis.length; i++){ if(i!==index){ lis[i].classList.remove("noww"); } } }和<li v-for="(option,index) in conto" v-bind:key="index" :class="{'noww':activeIndex === index}" @click="toggleActive(index)" >{{option.category_title}} </li>和<div class="cont" v-show="activeIndex === 0" > <ul> <li v-for="option2 in cont" v-bind:key="option2" :class="parseInt(option2.stock) ===1?'olik':''" > <a :href="option2.source" target="_blank"> <div class="contimg" > <img :src="option2.bigpic" alt="{{option2.title}}"> </div> <div class="context"> <span> <img :src="option2.smallpic" alt="">{{option2.subtitle}}</span> <h4><span>{{option2.title}}</span></h4> <p>{{option2.summary}} </p> </div> </a> <!-- <div class="difficulty"> <div class="difficultbox"> <div class="modulus"> <div class="tit">难度系数</div> <div class="starsbox"> <div class="starsimg"><img src="../images/starsolik.png"></div> </div> </div> <div class="honor"> <div class="tts xuefen"><img src="../images/olikdegree.png"></div> <div class="tts certificate"><img src="../images/olikdegree2.png"></div> </div> </div> </div> --> </li> </ul> </div> <div class="cont" v-show="activeIndex.value === 1" > <ul> <li v-for="option2 in cont2" v-bind:key="option2" :class="parseInt(option2.stock) ===1?'olik':''" > <a :href="option2.source" target="_blank"> <div class="contimg" > <img :src="option2.bigpic" alt="{{option2.title}}"> </div> <div class="context"> <span> <img :src="option2.smallpic" alt="">{{option2.subtitle}}</span> <h4><span>{{option2.title}}</span></h4> <p>{{option2.summary}} </p> </div> </a> </li> </ul> </div>实现tab切换

要实现tab切换，你可以使用Vue的响应式数据和v-show指令。首先，你需要定义一个活动索引（activeIndex）的响应式变量，初始值为0。然后，你可以使用v-for指令循环渲染tab选项，并绑定点击事件。在点击事件中，你可以根据索引值切换活动索引的值，并根据活动索引的值来显示对应的内容。

下面是修改后的代码：

<template>
  <div>
    <ul>
      <li v-for="(option, index) in conto" :key="index" :class="{'noww': activeIndex === index}" @click="toggleActive(index)">
        {{ option.category_title }}
      </li>
    </ul>

    <div class="cont" v-show="activeIndex === 0">
      <ul>
        <li v-for="option2 in cont" :key="option2" :class="parseInt(option2.stock) === 1 ? 'olik' : ''">
          <a :href="option2.source" target="_blank">
            <div class="contimg">
              <img :src="option2.bigpic" alt="{{option2.title}}">
            </div>
            <div class="context">
              <span>
                <img :src="option2.smallpic" alt="">{{option2.subtitle}}
              </span>
              <h4><span>{{option2.title}}</span></h4>
              <p>{{option2.summary}}</p>
            </div>
          </a>
        </li>
      </ul>
    </div>

    <div class="cont" v-show="activeIndex === 1">
      <ul>
        <li v-for="option2 in cont2" :key="option2" :class="parseInt(option2.stock) === 1 ? 'olik' : ''">
          <a :href="option2.source" target="_blank">
            <div class="contimg">
              <img :src="option2.bigpic" alt="{{option2.title}}">
            </div>
            <div class="context">
              <span>
                <img :src="option2.smallpic" alt="">{{option2.subtitle}}
              </span>
              <h4><span>{{option2.title}}</span></h4>
              <p>{{option2.summary}}
              </p>
            </div>
          </a>
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
import { ref } from 'vue';

export default {
  setup() {
    const activeIndex = ref(0);

    function toggleActive(index) {
      if (activeIndex.value === index) {
        activeIndex.value = null;
      } else {
        activeIndex.value = index;
      }
    }

    return {
      activeIndex,
      toggleActive,
    };
  },
};
</script>

在上述代码中，使用了Vue的Composition API（setup函数）来定义activeIndex的响应式变量和toggleActive函数。activeIndex用于控制显示哪个内容，toggleActive用于切换活动索引的值。

请注意，你需要根据实际情况修改其他部分的代码，比如数据绑定和样式类名的逻辑。