Login.vue

<template>
  <div class="login-container">
    <el-card class="login-card">
      <h3 class="login-title">用户登录</h3>
      <el-form ref="loginForm" :model="user" :rules="rules" label-width="80px" class="login-form">
        <el-form-item prop="username" label="用户名">
          <el-input v-model="user.username" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password" label="密码">
          <el-input v-model="user.password" type="password" placeholder="请输入密码"></el-input>
        </el-form-item>
        <el-form-item>
          <el-button type="primary" @click="userLogin">登录</el-button>
        </el-form-item>
      </el-form>
    </el-card>
  </div>
</template>


import { ref } from 'vue';
import {login} from "@/util/request";
import {filterMenus, initRouter} from "@/util/routeUtil";
import router from "@/router";
export default {
  name:'Login',
  setup() {
    const user = ref({
      username: 'admin',
      password: '123456',
    });

    const rules = {
      username: [
        { required: true, message: '请输入用户名', trigger: 'blur' },
      ],
      password: [
        { required: true, message: '请输入密码', trigger: 'blur' },
      ],
    };

    function userLogin(){
      console.log('user',user.value);
      login(user.value).then(res => {
        if (res.data.message='登录成功'){
          //1、初始化路由
          initRouter(res.data.data.role.menus)
          window.localStorage.setItem('navMenus',JSON.stringify(filterMenus(res.data.data.role.menus)))
          //2、跳转到主页
          router.replace('/index')
        }
      })
    }

    return {
      user,
      rules,
      userLogin,
    };
  },
};


<style>
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.login-card {
  width: 400px;
  padding: 20px;
}

.login-title {
  text-align: center;
  margin-bottom: 20px;
}

.login-form {
  margin-top: 20px;
}
</style>

==注意：==原因：页面刷新后，页面会重新实例化路由数据，因为是动态路由，所以页面刷新后会将router置为router/index.js配置的原始路由数据，所以匹配路由地址的时候会报错。因为只需要在用户会话期间保持动态路由状态，而不需要在不同组件之间共享或进行状态管理，所以将其存储在localStorage中

##修改Login.vue，将后台传回的menus数据缓存到localStorage中
//1、初始化路由
initRouter(res.data.data.role.menus)
localStorage.setItem('navMenus',JSON.stringify(filterMenus(res.data.data.role.menus)))
localStorage.setItem('menus',JSON.stringify(res.data.data.role.menus))
localStorage.setItem('token',JSON.stringify(res.data.data.token))

修改main.js，页面刷新的时候，会出发main.js的调用，因此我们在页面刷新的时候，重新进行路由的初始化

import { createApp } from 'vue'
import App from './App.vue'
import ElementPlus from 'element-plus'
import 'element-plus/dist/index.css'
import 'element-plus/theme-chalk/dark/css-vars.css'  //暗黑模式
import router from './router/index'
import {initRouter} from "@/util/routeUtil";

const app = createApp(App)

##初始化路由
const init = async ()=>{
    if (localStorage.getItem('token')){
        if (localStorage.getItem('menus')){
            await initRouter(JSON.parse(localStorage.getItem('menus')))
        }
    }
}

##通过await，在挂在之前先进行路由的初始化
const call = async ()=>{
    await init()
    app.use(ElementPlus)
    app.use(router)
    app.mount('#app')
}

##调用
call()

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