vue3动态路由刷新后空白或者404问题的解决

import { createStore } from 'vuex'

export default createStore({
  state: {
    menu_lists: []  //菜单
  },
  getters: {
    account(state) {
      return state.menu_lists  // 读取菜单列表
    }
  },
  mutations: {
    // 增加菜单
    menuAdd(state, n) {
      if (state.menu_lists.length == 0) {
        state.menu_lists.push(n)
      } else {
        if (state.menu_lists.some(menu => menu.name != n.name)) {
          state.menu_lists.push(n)
        }
      }
    },
    // 清空菜单
    menuDelect(state) {
      state.menu_lists.length = 0
    }
  },
  actions: {
    menu_add({ commit }, data) {
      commit('menuAdd', data)
    },
	// 登出时调用将菜单数据删除
    menu_delect({ commit }) {
      commit('menuDelect')
    }
  },
  modules: {
  }
})

// 创建完毕状态
  created() {
//在页面加载时读取sessionStorage里的状态信息
    if (sessionStorage.getItem("store")) {
      this.$store.replaceState(
        Object.assign(
          {},
          this.$store.state,
          JSON.parse(sessionStorage.getItem("store"))
        )
      );
    }
    //在页面刷新时将vuex里的信息保存到sessionStorage里
    window.addEventListener("beforeunload", () => {
      sessionStorage.removeItem("store");
      sessionStorage.setItem("store", JSON.stringify(this.$store.state));
    });
 }

import { useRouter } from "vue-router";
import { useStore } from "vuex";
export default defineComponent({
    setup() {
    const store = useStore();
    const router = useRouter();
        // 路由数据重新封装
    function routerPackag(routers) {
      let accessedRouters = routers.filter((itemRouter) => {
        if (itemRouter.component != "Layout") {
          //处理组件---重点
          router.addRoute("base", {
            path: `/${itemRouter.path}`,
            name: itemRouter.name,
            component: () => import(`@/${itemRouter.component}`),
          });
          // 通过sessionStorage排查菜单是否存储，避免刷新后重复添加
          if (!sessionStorage.getItem("store")) {
            store.dispatch("menu_add", itemRouter);
          }
        }
        //存在子集
        if (itemRouter.children && itemRouter.children.length) {
          routerPackag(itemRouter.children);
        }
        return true;
      });
      return accessedRouters;
    }
   }
)}

import { createRouter, createWebHashHistory } from 'vue-router'
import store from "../store";
import { ref } from 'vue'
const routes = [
  {
    path: '/login',
    name: 'login',
    // route level code-splitting
    // this generates a separate chunk (about.[hash].js) for this route
    // which is lazy-loaded when the route is visited.
    component: () => import( /* webpackChunkName: "Login" */ '../views/ant_login.vue'),
    meta: {
      requireAuth: false,
    },
  },
  {
    path: '/',
    name: 'base',

    component: () => import( /* webpackChunkName: "Login" */ '../views/ant_base.vue'),
    meta: {
      requireAuth: true,
    },
    children: [
      {
        path: 'index',
        name: 'home',
        redirect: "/map",
        component: () => import( /* webpackChunkName: "Login" */ '../views/ant_home.vue'),
      }
    ]
  },
  {
    name: "NotFont",
    path: '/:pathMatch(.*)*',
    component: () => import('../components/NotFont.vue'),
    alias: '/404', // 别名
    hideMenu: true
  }
]

const router = createRouter({
  history: createWebHashHistory(), //createWebHashHistory是hash模式
  // 页面刷新白屏问题
  // mode取值说明：
  // histroy：URL就像正常的 url，示例：http://localhost:8080/home
  // hash：默认值，会多一个“#”，示例：http://localhost:8080/#/home
  // abstract”：url不变示例：http://localhost:8080
  // mode: 'history',
  base: process.env.BASE_URL,
  routes
})
// 下面全局前置路由守卫可在main文件编写
const registerRouteFresh = ref(true) // 定义标识，记录路由是否添加
router.beforeEach(async (to, from, next) => {
  if (registerRouteFresh.value && store.state.menu_lists.length > 0) {
    router.removeRoute("NotFont")
    await store.state.menu_lists.forEach(e => {
      // 
      // 处理组件---重点
      router.addRoute("base", {
        path: `/${e.path}`,
        name: e.name,
        component: () => import(`@/${e.component}`),
      });
    })
    registerRouteFresh.value = false
    // next({ ...to, replace: true })
    next({
      path: `${to.path}`
    })
  } else {
    router.addRoute(router.options.routes[2])
    next()
  }
})

// 全局后置钩子-常用于结束动画等
router.afterEach(() => {
  //不接受next
});
export default router

import { useStore } from "vuex";
export default defineComponent({
    setup() {
    const store = useStore()
    function Logout() {
    // 将vuex的菜单数据删除
    store.dispatch("menu_delect");
       window.sessionStorage.clear()
   }
)}