Vue如何实现嵌套菜单组件

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本文旨在使用vue.js完成一个嵌套的菜单组件，使用mock.js对数据进行模拟，并且最小化复现功能

安装mock

cnpm i mockjs

//引入mockjsimport Mock from 'mockjs'//使用mockjs模拟数据Mock.mock('/menuData', 'get', {    "ret": 0,    "data": [{            "id": 1,            "name": "第一层",            "children": [{                    "name": "第二层"                },                {                    "name": "第二层"                },                {                    "name": "第二层"                }            ]        },        {            "id": 2,            "name": "第一层",            "children": [{                    "name": "第二层"                },                {                    "id": 3,                    "name": "第二层",                    "children": [{                            "name": "第三层"                        },                        {                            "name": "第三层"                        },                        {                            "name": "第三层"                        }                    ]                },                {                    "id": 4,                    "name": "第二层",                    "children": [{                            "name": "第三层"                        },                        {                            "name": "第三层"                        },                        {                            "id": 5,                            "name": "第三层",                            "children": [{                                    "name": "第四层"                                },                                {                                    "name": "第四层"                                },                                {                                    "id": 6,                                    "name": "第四层",                                    "children": [{                                            "name": "第五层"                                        },                                        {                                            "name": "第五层"                                        },                                        {                                            "name": "第五层"                                        }                                    ]                                }                            ]                        }                    ]                }            ]        }    ]});

菜单组件

<!-- * @Author: byron * @Date: 2022-02-24 09:01:27 * @LastEditTime: 2022-02-24 10:50:38--><template>    <div>        <ul class="menu" v-for="item in data" :key="item.id">            <li                class="subMenu"                @click="showhd(item)"                :class="[item.children ? 'color' : '']"            >                <span> {{ item.name }} {{ item.id }}</span>            </li>            <div class="child" v-if="item.id == currentId && openFlag">                <xxxx v-if="item.children" :data="item.children"></xxxx>            </div>        </ul>    </div></template><script>export default {    name: 'xxxx',    components: {},    props: ['data'],    data() {        return {            currentId: undefined,            openFlag: false,        }    },    methods: {        showhd(a) {            console.log(this.openFlag)            this.openFlag = !this.openFlag            this.currentId = a.id            console.log(this.currentId)            console.log(this.openFlag)        },    },}</script><style scoped>li {    text-decoration: none;    }.ul {    overflow: hidden;}.head {    display: none;}.show {    display: block;}.color {    color: brown;}</style>

使用菜单组件

<template>    <div id="app">        <h2>嵌套组件的实现</h2>        <HelloWorld :data="menu" />    </div></template><script>import HelloWorld from './components/HelloWorld.vue'import axiOS from 'axios'export default {    name: 'App',    components: {        HelloWorld,    },    data() {        return {            menu: [],        }    },    async created() {        const { data: r } = await axios.get('/menuData')        this.menu = r.data        console.log(this.menu)    },}</script><style>#app {    font-family: Avenir, Helvetica, Arial, sans-serif;    -WEBkit-font-smoothing: antialiased;    -moz-osx-font-smoothing: grayscale;    text-align: center;    color: #2c3e50;    margin-top: 60px;}</style>

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