递归竖栏菜单简单思路

自己的项目要写一个竖栏菜单，所以记录一下思路吧，先粗糙的实现一把，有机会再把细节修饰一下

功能上就是无论这个菜单有多少层级，都能显示出来，另外，需要带图标，基于element-plus写成，当这个菜单栏点开的时候最好整个页面的高度不要有变化，最后整成了个小草稿

MyMenu.vue
<template><!-- 自己写的竖栏菜单组件 --><!-- <el-menu style="height: 100%;width:100%"> --><el-scrollbar max-height=100%><el-menu style="width: 100%;border: 0;" unique-opened :default-active="props.defaultIndex" active-text-color="#ffd04b"background-color="#545c64" text-color="#fff"><MenuTree :menu-data="props.data"></MenuTree></el-menu></el-scrollbar>
</template>
<script lang="ts" setup>
import MenuTree from "./MenuTree.vue"
const props=defineProps<{data:Array<any>,defaultIndex:string}>()
</script>

里面有个递归组件

MenuTree.vue
<template><!-- 递归组件 --><!-- 为了创建无限菜单而使用 --><template v-for="value in props.menuData"><!-- 没有children就是一个单标签 --><el-menu-item v-if="!value.children" :index="value.index"><template v-if="value.icon"><component :is="value.icon" style="width: 1rem;"></component></template>{{ value.title }}</el-menu-item><!-- 多标签的情况 --><el-sub-menu v-else :index="value.index"><template #title><template v-if="value.icon"><component :is="value.icon" style="width: 1rem;"></component></template> <span>{{ value.title }}</span></template><MenuTree :menuData="value.children"></MenuTree></el-sub-menu></template>
</template>
<script setup lang="ts">
import MenuTree from "../Page1/MenuTree.vue"
const props=defineProps<{menuData:Array<any>}>()
</script>

最后写个参数挂载一下，我这边用的icon是element-plus组件自带的

<template><el-container style="height: 100vh;"><el-header style="padding: 0;height: 5rem;"><div style="height: 100%;background-color:pink"><span>welcome to page1</span><br /><span>该页面用来写一个竖版menu</span></div></el-header><el-container style="height: calc(100vh - 5rem);"><el-aside width="15%" style="background-color:lightblue;"><MyMenu :data="menuData" :default-index="defaultIndex"/></el-aside><el-main style="background-color:rgb(246, 199, 11);"><component :is="iconStr" style="width: 1rem;"></component></el-main></el-container></el-container>
</template>
<script setup lang="ts">
import {ref} from "vue"
import { Search,Select,Close,User } from '@element-plus/icons-vue';
import MyMenu from './MyMenu.vue';
let menuData = [{title: "睡觉",index: "0",icon: Select},{title: "游戏",index: "1",icon: Search,children: [{title: "上古卷轴",index: "1-1",children: [{title: "上古卷轴匕首雨",index: "1-1-1",},{title: "上古卷轴天际",index: "1-1-2",icon: Select}]},{title: "辐射",index: "1-2",children: [{title: "龙万德",index: "1-2-1"},{title: "辐射新维加斯",index: "1-2-2"}]}]},{title: "美食",index: "2",icon: Close,children: [{title: "淮扬菜",index: "2-1",children: [{title: "红烧狮子头",index: "2-1-1"},{title: "猪头肉",index: "2-1-2"},]},{title: "川菜",index: "2-2",children: [{title: "四川泡菜",index: "2-2-1"},{title: "水煮鱼",index: "2-2-2"},{title: "开水白菜",index: "2-2-3"},]},{title: "粤菜",index: "2-3",children: [{title: "白切鸡",index: "2-3-1"},{title: "顺德鱼生",index: "2-3-2"},{title: "猪肚鸡",index: "2-3-3"},]}]},{title: "编程",index: "3",icon: User,children: [{title: "golang",index: "3-1",children: [{title: "云原生",index: "3-1-1"},{title: "gin",index: "3-1-2"}]},{title: "js",index: "3-2"},{title: "python",index: "3-3"}]}
]
// 默认index值
let defaultIndex = ref("0")
</script>

主要过程就是写了一个递归的菜单栏，然后用el-scrollbar包装了一下，以免这个菜单展开的时候把盒子高度撑开。

细节上难看了一点，此外我觉得整个菜单的高度应该和传入数组的最大深度相关，得把这个el-scrollbar组件换掉才行，先写着，有时间完善。