一级分类绑定二级分类

html:

<template>
  <div class="container">
    <headTop headTitle="行业分类"></headTop>
    <div class="main">
      <--一级分类-->
      <ul class="sidebar">
        <li v-for="(item, idx) in sidebarList" :key="idx" @click="currentIndex1 = idx" :class="currentIndex1 === idx ? 'active' : ''">
          <p>{{item.name}}</p>
        </li>
      </ul>
      <--二级分类-->
      <ul class="list">
        <li v-for="(item, idx) in sidebarList[currentIndex1].list" :key="idx" :class="currentIndex2 == `${currentIndex1}${idx}` ? 'active' : ''" @click="selectedType(item, `${currentIndex1}${idx}`)">
          <p class="item_name">{{item.name}}</p>
        </li>
      </ul>
    </div>
  </div>
</template>

　　

　　

来源：https://www.cnblogs.com/Awen71815iou/p/11806436.html