vue3+Element采用递归调用封装导航栏实现
作者：鹏程933
本文主要介绍了vue3+Element采用递归调用封装导航栏，文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友们下面随着小编来一起学习学习吧
效果预览
模拟数据
- 数据来源有很多，可以是自己写死的，也可以是后端调用得到的，也可以从别的组件中拿到
- 这里采用从路由中拿
- 定义数据源src/router/module.js/
const Login = () => import('../views/Login/Login.vue');
const Layout = () => import('../layout/layout.vue');
const Home = () => import('../views/Home.vue');
const User = () => import('../views/About.vue');
const Avatar = () => import('../views/Users/Avatar.vue');
const Password = () => import('../views/Users/Password.vue');
const routes = [
{
path: '/',
redirect: '/home',
},
{
path: '/',
name: 'Layout',
component: Layout,
meta: {
permission: true,
},
children: [
{
path: '/home',
name: 'Home',
component: Home,
meta: {
title: '首页',
icon: '<span class="iconfont icon-shouye"/>', // iconfont图标
inSide: true,
},
},
{
path: '/user',
name: 'User',
component: User,
meta: {
title: '个人中心',
icon: '<span class="iconfont icon-yonghuzhongxin1"/>',
},
children: [
{
path: '/user/avatar',
name: 'Avatar',
component: Avatar,
meta: {
title: '修改头像',
},
children: [
{
path: '/setUp/avatar',
name: 'setUp',
component: Avatar,
meta: {
title: '暂无',
},
},
],
},
{
path: '/user/password',
name: 'Password',
component: Password,
meta: {
title: '修改密码',
},
},
],
},
{
path: '/setUp',
name: 'SetUp',
meta: {
title: '系统设置',
icon: '<span class="iconfont icon-celveguanli"/>',
},
children: [
{
path: '/setUp/avatar',
name: 'setUp',
component: Avatar,
meta: {
title: '暂无',
},
},
{
path: '/setUp/avatar',
name: 'setUp',
component: Avatar,
meta: {
title: '暂无',
},
},
],
},
],
},
{
path: '/login',
name: 'Login',
component: Login,
},
];
export default routes;
递归实现导航栏渲染
- 对于导航栏渲染难点在于不知道有多少层级的导航，可能一级也可能两级或者更多
- 为了方便采用两个组件父组件aside.vue与子组件subAside.vue渲染导航
- 这时候就需要采用递归的方式
- 首先判断哪些数据需要渲染，需要的拿出来
- 判断是否有子节点需要渲染
- 有子节点，递归调用子组件本身
- 没有子节点，返回导航项进行渲染
父组件aside.vue
<template>
<el-radio-group v-model="isCollapse" style="margin-bottom: 20px">
<el-radio-button :label="false">expand</el-radio-button>
<el-radio-button :label="true">collapse</el-radio-button>
</el-radio-group>
<el-menu
default-active="2"
class="el-menu-vertical-demo"
:collapse="isCollapse"
select="handleSelect"
router
unique-opened
>
<!-- 将渲染导航每一项传给子组件渲染，item代表要渲染每一项 -->
<SubAside :isCollapse="isCollapse" v-for="(item,index) in navs" :key="item.path" :menu="item" :index="item.path" />
</el-menu>
</template>
<script lang="ts" setup>
import { ref } from 'vue';
import router from '../router/module';
const navs =router.filter((item) => item.meta?.permission)[0].children // 过滤拿到数据
console.log(navs);
const isCollapse = ref(true); // 是否收起，默认不收起
</script>
<style lang="scss" scoped></style>
父组件处理后的用于渲染的数据
[
{
component: () => import('/src/views/Home.vue')
meta: {title: '首页', icon: '<span class="iconfont icon-shouye"/>', inSide: true}
name: "Home"
path: "/home"
},
{
component: () => import('/src/views/About.vue')
meta: {title: '个人中心', icon: '<span class="iconfont icon-yonghuzhongxin1"/>'}
name: "User"
path: "/user"
chilren:[
{
children: [{…}]
component: () => import('/src/views/Users/Avatar.vue?t=1655544364909')
meta: {title: '修改头像'}
name: "Avatar"
path: "/user/avatar"
},
{
component: () => import('/src/views/Users/Password.vue')
meta: {title: '修改密码'}
name: "Password"
path: "/user/password"
}
]
},
{
meta: {title: '系统设置', icon: '<span class="iconfont icon-celveguanli"/>'}
name: "SetUp"
path: "/setUp"
chilren:[
{
component: () => import('/src/views/Users/Avatar.vue?t=1655544364909')
meta: {title: '暂无'}
name: "setUp"
path: "/setUp/avatar"
},
{
component: () => import('/src/views/Users/Avatar.vue?t=1655544364909')
meta: {title: '暂无'}
name: "setUp"
path: "/setUp/avatar"
}
]
}
]
子组件subAside.vue
<template>
<!-- 有子节点渲染这个 -->
<el-sub-menu :index="menu.path" v-if="menu?.children">
<template #title>
<el-icon v-html="menu?.meta.icon"></el-icon>
<span>{{menu?.meta.title}}</span>
</template>
<!-- 递归调用本身，该组件在index.ts中全局注册了 -->
<SubAside v-for="item in menu.children" :menu="item" :isCollapse="isCollapse"/>
</el-sub-menu>
<!-- 没有子节点渲染这个 -->
<el-menu-item v-else :index="menu?.path">
<el-icon v-html="menu?.meta.icon"></el-icon>
<span slot="title">{{menu?.meta.title}}</span>
</el-menu-item >
</template>
<script lang="ts" setup>
import { ref } from "vue"
// 拿到父组件传入的值
defineProps({
isCollapse:Boolean,
menu:Object
})
</script>
<style lang="scss" scoped>
</style>
配置
版本
"vue": "^3.2.25", "element-plus": "^2.2.6",
main.ts中配置
import { createApp } from 'vue';
import App from './App.vue';
// import 'virtual:windi.css';
import router from './router/index';
/**
* 引入elment
*/
import ElementPlus from 'element-plus'
import 'element-plus/dist/index.css'
import 'element-plus/theme-chalk/dark/css-vars.css'
import './styles/dark/css-vars.css'
// 引入 Pinia 状态管理工具
import pinia from './stores'
const app=createApp(App)
/**
* 全局注册组件
*/
import SubAside from './components/subAside.vue'
app.component('SubAside', SubAside)
// 注册Element全局可用
app.use(ElementPlus).use(router).use(pinia).mount('#app');
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