Laissez-vous comprendre brièvement l'utilisation du menu Menu dans AntDesign Vue

<template>
    <div id="app">
        <div style="width: 256px">
            <a-button type="primary" style="margin-bottom: 16px" @click="toggleCollapsed">
            <a-icon :type="collapsed ? &#39;menu-unfold&#39; : &#39;menu-fold&#39;" />
            </a-button>
            <a-menu
                :defaultSelectedKeys="[$route.path]"
                :openKeys="openKeys"
                mode="inline"
                theme="dark"
                :inline-collapsed="collapsed"
                @openChange="onOpenChange"
                @click="menuClick"
            >
                <template v-for="item in list">
                    <a-menu-item v-if="!item.children" :key="item.path">
                        <a-icon type="pie-chart" />
                        <span>{{ item.title }}</span>
                    </a-menu-item>
                    <sub-menu v-else :key="item.path" :menu-info="item" />
                </template>
            </a-menu>
        </div>
        <router-view/>
    </div>
</template>

<script>
import { Menu } from &#39;ant-design-vue&#39;;
const SubMenu = {
  template: `
      <a-sub-menu :key="menuInfo.key" v-bind="$props" v-on="$listeners">
        <span slot="title">
          <a-icon type="mail" /><span>{{ menuInfo.title }}</span>
        </span>
        <template v-for="item in menuInfo.children">
          <a-menu-item v-if="!item.children" :key="item.path">
            <a-icon type="pie-chart" />
            <span>{{ item.title }}</span>
          </a-menu-item>
          <sub-menu v-else :key="item.path" :menu-info="item" />
        </template>
      </a-sub-menu>
    `,
  name: &#39;SubMenu&#39;,
  // must add isSubMenu: true 此项必须被定义
  isSubMenu: true,
  props: {
    // 解构a-sub-menu的属性，也就是文章开头提到的为什么使用函数式组件
    ...Menu.SubMenu.props,
    // Cannot overlap with properties within Menu.SubMenu.props
    menuInfo: {
      type: Object,
      default: () => ({}),
    },
  },
};

export default {
    name: "App",
    components: {
        &#39;sub-menu&#39;: SubMenu,
    },
    data() {
        return {
            collapsed: false,
            openKeys: [],
            rootSubmenuKeys: [&#39;/user&#39;],
            list: [
                {
                    key: &#39;1&#39;,
                    title: &#39;信息管理&#39;,
                    path: &#39;/info&#39;,
                },
                {
                    key: &#39;2&#39;,
                    title: &#39;用户管理&#39;,
                    path: &#39;/user&#39;,
                    children: [
                        { 
                            key: &#39;2.1&#39;,
                            title: &#39;后台用户&#39;,
                            path: &#39;/adminUser&#39;,
                            children: [
                                { 
                                    key: &#39;2.1.1&#39;,
                                    title: &#39;新增用户&#39;,
                                    path: &#39;/addAdminUser&#39;,
                                    children: [
                                        {
                                            key: &#39;2.1.1。1&#39;,
                                            title: &#39;用户xx&#39;,
                                            path: &#39;/addAdminUserXX&#39;,
                                        }
                                    ]
                                }
                            ]
                        },
                        { 
                            key: &#39;2.2&#39;,
                            title: &#39;前台用户&#39;,
                            path: &#39;/frontUser&#39;,
                        }
                    ]
                }
            ],
        };
    },
    created(){
        const openKeys = window.sessionStorage.getItem(&#39;openKeys&#39;)
        if(openKeys){
            this.openKeys = JSON.parse(openKeys)
        }
    },
    methods: {
        toggleCollapsed() {
            this.collapsed = !this.collapsed;
        },
        onOpenChange(openKeys) {
            // 将当前打开的父级菜单存入缓存中
            window.sessionStorage.setItem(&#39;openKeys&#39;, JSON.stringify(openKeys))
            //  控制只打开一个
            const latestOpenKey = openKeys.find(key => this.openKeys.indexOf(key) === -1);
            if (this.rootSubmenuKeys.indexOf(latestOpenKey) === -1) {
                this.openKeys = openKeys;
            } else {
                this.openKeys = latestOpenKey ? [latestOpenKey] : [];
            }
        },
        menuClick({key}) {
            // 获取到当前的key,并且跳转
            this.$router.push({
                path: key
            })
        },
    }
};
</script>

<style>
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding: 50px;
}
</style>

const originalPush = Router.prototype.push
Router.prototype.push = function push(location) {
    return originalPush.call(this, location).catch(err => err)
}