vue3.0列表页面做缓存的方法代码

   <router-view v-slot="{ Component, route }">
            <keep-alive :include="cacheViewsState">
              <component :is="Component" />
            </keep-alive>
   </router-view>

const cacheViewsState = store.state.app.cachedViews

  state: {
  
    cachedViews: ['listPage']
  },
mutations:{

 ADD_CACHED_VIEW: (state, view) => {
      if (state.cachedViews.includes(view)) return
      state.cachedViews.push(view)
    },
 DEL_CACHED_VIEW: (state, view) => {
      const index = state.cachedViews.indexOf(view)
      index > -1 && state.cachedViews.splice(index, 1)
    }
},
  actions: {
//添加缓存组件
    addCachedView({ commit }, view) {
      commit('ADD_CACHED_VIEW', view)
    },
    //删除缓存组件
    delCachedView({ commit, state }, view) {
      return new Promise((resolve) => {
        commit('DEL_CACHED_VIEW', view)
        resolve([...state.cachedViews])
      })
    }
}

<script>
export default {
  name: 'listPage'
}
</script>

onActivated(() => {
  getList() // 初始化列表
})

//isRouterAlive：通过先设置isRouterAlive为false再设置为true可实现组件的销毁
<router-view v-slot="{ Component }" v-if="isRouterAlive">
    <keep-alive>
          <component :is="Component" v-if="_this.$route.meta.keepAlive" :key="$route.name" />
    </keep-alive>
    <component :is="Component" v-if="!_this.$route.meta.keepAlive" />
</router-view>

//设置meta
const routes: Array<RouteRecordRaw> = [
   {
        path: 'list',
        name: 'list',
        meta: { keepAlive: true, cacheList: ['detail'] },
        component: () => import('@/views/list.vue')
    },
]
//路由拦截
router.beforeEach((to, from, next) => {
   //从cacheList中的任何一个页面返回，当前页面缓存
   const cacheList: any = to.meta.cacheList
   if (cacheList) {
      if (cacheList.indexOf(from.name) > -1) {
          to.meta.keepAlive = true
      } else {
          //解决第一次不缓存问题
          if (from.name) {
            to.meta.keepAlive = false
          } else {
            to.meta.keepAlive = true
          }
        }
      }
      next()  
}

import { defineComponent, nextTick } from 'vue'
import { onBeforeRouteLeave } from 'vue-router'
export default defineComponent({
  name: 'list',
  setup() {
     onBeforeRouteLeave((to, from, next) => {
      //当即将访问的界面不是detail则销毁组件，以免上一次缓存信息存在
      const cacheList: any = ['detail']
      if (cacheList.indexOf(to.name) === -1) {
        //销毁缓存信息(vue3没有_this.$destory()方法，所以通过v-if实现组件的销毁)
       //vuex改变全局变量isRouterAlive的值
        _this.$store.commit('menu/changeRouterAlive', false)
        nextTick(() => {
          _this.$store.commit('menu/changeRouterAlive', true)
        })
      }
      next()
    })
  }
})