// router的配置
{
    path: "list",
    meta: {
      title: "商品列表",
      keepAlive: true //表示需要缓存
    },
    component: () => import("@/views/product/list/index")
}

// app.vue配置
<template>
  <div>
    <keep-alive>
      <router-view v-if="$route.meta.keepAlive"></router-view>
    </keep-alive>
    <router-view v-if="!$route.meta.keepAlive"></router-view>
  </div>
</template>