1、当菜单层级比较深时,一级一级书写菜单比较麻烦,若从后端动态获取菜单数据,前端如何动态渲染菜单,就是需要解决的问题。故此,考虑递归渲染树状菜单。主要判断子菜单是否存在,若存在,就递归。同时使用svg渲染菜单图标。
递归渲染深层次树状菜单组件menu-content.vue
<!--
/**
*递归渲染深层次树状菜单,并使用svg渲染菜单图标
*/
-->
<template>
<div>
<template v-if="checkDataType(menus) === 'Array'">
<div v-for="menu in menus" :key="menu.name">
<el-submenu v-if="menu.children && menu.children.length > 0" :index="menu.name">
<template slot="title">
<svg-icon class="svgClass" :icon-class="menu.icon"></svg-icon>
<span>{
{ menu.title }}</span>
</template>
<menu-content :menus="menu.children"></menu-content>
</el-submenu>
<el-menu-item v-else :index="menu.name">
<svg-icon class="svgClass" :icon-class="menu.icon"></svg-icon>
<span>{
{ menu.title }}</span>
</el-menu-item>
</div>
</template>
<el-menu-item v-else :index="menus.name">
<svg-icon class="svgClass" :icon-class="menu.icon"></svg-icon>
<span>{
{ menu.title }}</span>
</el-menu-item>
</div>
</template>
<script>
export default {
name: 'menu-content',
props: ['menus'],
data() {
return {}
},
methods: {
checkDataType(data) {
return Object.prototype.toString.call(data).slice(8, -1);
}
}
}
</script>
<style scoped>
.svgClass {
font-size: 18px;
padding-right: 6px;
opacity: 0.6;
}
</style>
2、使用递归组件渲染菜单 aside-menu.vue
<template>
<el-menu :default-active="activeMenu" @select="menuSelect">
<menu-content :menus="menus"></menu-content>
</el-menu>
</template>
<script>
import MenuContent from './menu-content.vue';
export default {
name: 'aside-menu',
components: { MenuContent },
data() {
return {
activeMenu: 'Home',
menus: [{
id: 1,
name: 'Home',
title: '首页',
path: '/home',
order: 1,
icon: 'home',
parentId: 0,
visible: true
},
{
id: 2,
name: 'System',
title: '系统管理',
path: '/system',
order: 2,
icon: 'system',
parentId: 0,
visible: true,
children: [{
id: 21,
name: 'User',
title: '用户管理',
path: '/system/user',
order: 1,
icon: 'user',
parentId: 2,
visible: true
},
{
id: 22,
name: 'Role',
title: '角色管理',
path: '/system/role',
order: 2,
icon: 'role',
parentId: 2,
visible: true
},
{
id: 23,
name: 'Menu',
title: '菜单管理',
path: '/system/menu',
order: 3,
icon: 'menu',
parentId: 2,
visible: true
}]
},
{
id: 3,
name: 'Monitor',
title: '系统监控',
path: '/monitor',
order: 3,
icon: 'monitor',
parentId: 0,
visible: true,
children: [{
id: 31,
name: 'Online',
title: '在线用户',
path: '/monitor/online',
order: 1,
icon: 'online',
parentId: 3,
visible: true
},
{
id: 31,
name: 'Statistics',
title: '统计图表',
path: '/monitor/statistics',
order: 2,
icon: 'statistics',
parentId: 3,
visible: true
}]
}],
}
},
created() {
this.activeMenu = this.$route.name;
},
methods: {
menuSelect(index) {
this.$router.push({ name: index });
}
},
}
</script>
渲染结果: