自写vue导航栏--动态读取js的数据

App.vue

<template>
  <el-container class="layout-container-demo" style="height: 500px">
    <el-aside width="200px">
      <el-scrollbar>
<!--        <el-menu :default-openeds="['1', '3']">-->
<!--          <el-sub-menu index="1">-->
<!--            <template #title>-->
<!--              <el-icon><message /></el-icon>导航一-->
<!--            </template>-->
<!--            <el-menu-item-group>-->
<!--              <template #title>Group 1</template>-->
<!--              <el-menu-item index="1-1">Option 1</el-menu-item>-->
<!--              <el-menu-item index="1-2">Option 2</el-menu-item>-->
<!--            </el-menu-item-group>-->
<!--            <el-menu-item-group title="Group 2">-->
<!--              <el-menu-item index="1-3">Option 3</el-menu-item>-->
<!--            </el-menu-item-group>-->
<!--            <el-sub-menu index="1-4">-->
<!--              <template #title>Option4</template>-->
<!--              <el-menu-item index="1-4-1">Option 4-1</el-menu-item>-->
<!--            </el-sub-menu>-->
<!--          </el-sub-menu>-->
<!--        </el-menu>-->

        <el-menu>
          <el-sub-menu v-for="item in $router.options.routes">
            <template #title>
              <el-icon><message /></el-icon>
              {{ item.name }}
            </template>
            <el-menu-item v-for="item2 in item.children">{{item2.name}}</el-menu-item>
          </el-sub-menu>
        </el-menu>
      </el-scrollbar>
    </el-aside>

    <el-container>
      <el-header style="text-align: right; font-size: 12px">
        <div class="toolbar">
          <el-dropdown>
            <el-icon style="margin-right: 8px; margin-top: 1px"
            ><setting
            /></el-icon>
            <template #dropdown>
              <el-dropdown-menu>
                <el-dropdown-item>View</el-dropdown-item>
                <el-dropdown-item>Add</el-dropdown-item>
                <el-dropdown-item>Delete</el-dropdown-item>
              </el-dropdown-menu>
            </template>
          </el-dropdown>
          <span>Tom</span>
        </div>
      </el-header>

      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>

</template>

<script scope setup>
import { ref } from 'vue'
import { Menu as IconMenu, Message, Setting } from '@element-plus/icons-vue'

const item = {
  date: '2016-05-02',
  name: 'Tom',
  address: 'No. 189, Grove St, Los Angeles',
}
const tableData = ref(Array.from({ length: 20 }).fill(item))
</script>

<style scoped>
.layout-container-demo .el-header {
  position: relative;
  background-color: var(--el-color-primary-light-7);
  color: var(--el-text-color-primary);
}
.layout-container-demo .el-aside {
  color: var(--el-text-color-primary);
  background: var(--el-color-primary-light-8);
}
.layout-container-demo .el-menu {
  border-right: none;
}
.layout-container-demo .el-main {
  padding: 0;
}
.layout-container-demo .toolbar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  right: 20px;
}
</style>

PageOne.vue(Two\Three\Four.vue类似)

<template>
<h1>这是页面1</h1>
</template>

<script>
export default {
  name: "PageOne"
}
</script>

<style scoped>

</style>

index.js

import { createRouter, createWebHistory } from 'vue-router'
import PageOne from '../views/PageOne.vue'
import PageTwo from '../views/PageTwo.vue'
import PageThree from '../views/PageThree.vue'
import PageFour from '../views/PageFour.vue'
import App from "@/App.vue";

const routes = [
  {
    path: '/',
    name: '导航一',
    component: App,
    children: [
      {
        path: '/one',
        name: 'PageOne',
        component: PageOne
      },
      {
        path: '/two',
        name: 'PageTwo',
        component: PageTwo
      }
    ]
  },
  {
    path: '/navigation',
    name: '导航二',
    component: App,
    children: [
      {
        path: '/three',
        name: 'PageThree',
        component: PageThree
      },
      {
        path: '/four',
        name: 'PageFour',
        component: PageFour
      }
    ]
  }

]

const router = createRouter({
  history: createWebHistory(process.env.BASE_URL),
  routes
})

export default router

实现引入：