使用el-tab-pane添加返回按钮

效果如下图所示

  <el-tabs type="border-card" v-model="activeIndex" :before-leave="beforeLeave">
<el-tab-pane name="0">
       <span slot="label" style="padding: 8px">
         <div class="el-icon-back" style="font-weight: bold;color: rgb(1,171,158)"/>
       </span>
</el-tab-pane>
</el-tabs>


beforeLeave(activeIndex, oldActiveIndex) {
        if (activeIndex === '0') {
          this.$router.back()
          return false
        }
      },