Vue3嵌套路由中使用keep-alive缓存多层的实现

import router from '@/router/index'
import PageTitleUtils from '@/utils/PageTitleUtils'
import { ElMessage } from 'element-plus'
import useStore from '@/store/index'
import type { RouteLocationNORMalized, NavigationGuardNext } from 'vue-router'
import NProgress from 'nprogress'
import 'nprogress/nprogress.CSS'

NProgress.configure({ showSpinner: false }) // NProgress Configuration

const { user, routeStore } = useStore()

const whiteList = ['/login'] // no redirect whitelist

router.beforeEach(async (to: RouteLocationNormalized, from: RouteLocationNormalized, next: NavigationGuardNext) => {
  NProgress.start()
  if (user.hasToken()) {
    if (to.path === '/login') {
      next({ path: '/' })
      NProgress.done()
    } else {
      if (user.hasUserInfo()) {
        next()
        NProgress.done()
      } else {
        try {
          await user.getUserInfo()
          await routeStore.setRoutes()
          next({ ...to, replace: true })
          NProgress.done()
        } catch (error: any) {
          routeStore.resetRoutes()
          user.resetUserInfo()
          ElMessage.error(error || 'Has Error')
          next(`/login?redirect=${to.fullPath}`)
          NProgress.done()
        }
      }
    }
  } else {
    
    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, Go directly
      next()
      NProgress.done()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.fullPath}`)
      NProgress.done()
    }
  }
})

router.afterEach((to: any) => {
  NProgress.done()
  // set page title
  const { meta }: any = to
  document.title = PageTitleUtils.getPageTitle(meta.title)
  // delayering router
  delayeringRoute(to)
})



function delayeringRoute(to: RouteLocationNormalized) {
  if (to.matched && to.matched.length > 2) {
    for (let i = 0; i < to.matched.length; i++) {
      const element = to.matched[i]
      // 移除多余的 layout， 也许你项目中并不叫 layout ，自行修改此处
      if (element.components?.default.name === 'layout') {
        to.matched.splice(i, 1)
        handleKeepAlive(to)
      }
    }
  }
}

<script lang="ts" setup name="AppMain">
  import { useRoute } from 'vue-router'
  import useStore from '@/store';
  import { storeToRefs } from 'pinia';

  const route = useRoute()
  const { tagview } = useStore()
  const { cacheList } = storeToRefs(tagview)
</script>

<template>
  <div class="app-main">
    <router-view v-slot="{ Component }">
      <keep-alive :include="cacheList">
        <component :is="Component" :key="route.fullPath" />
      </keep-alive>
    </router-view>
  </div>
</template>

<style scoped lang="scss">
</style>

<script lang="ts" setup name="TableManage">
  import { useRoute } from 'vue-router'
  import useStore from '@/store';
  import { storeToRefs } from 'pinia';
  import { onMounted } from 'vue';

  const route = useRoute()
  const { tagview } = useStore()
  const { cacheList } = storeToRefs(tagview)

  onMounted(() => {
    tagview.addCacheList('TableManage')
  })

</script>

<template>
  <router-view v-slot="{ Component }">
    <keep-alive :include="cacheList">
      <component :is="Component" :key="route.fullPath" />
    </keep-alive>
  </router-view>
</template>