首先来总结element ui 官方文档的左侧菜单结构,带有el-submenu为子级节点,el-menu-item表示没有下级。当然,菜单不能写死，因为菜单也许不止两级,所以我们需要递归来实现。根据当前节点是否有下级去判断,如果有下级,则继续调用子级,直到没有下级为止,下面我贴上左侧菜单所有的代码:

请求数据格式

[ { name: "首页", id: -1, icon: "el-icon-picture-outline-round", url: "/index", children: [] }, { name: "按钮", id: 20, icon: "el-icon-message-solid", url: "/button", children: [] }, { name: "测试1", id: 1, icon: "el-icon-s-claim", url: "", children: [ { id: 4, parentid: 1, name: "测试1-1", icon: "el-icon-chat-dot-round", url: "", children: [ { id: 8, parentid: 1, name: "测试1-1-1", icon: "el-icon-cloudy", url: "/test", children: [] }, { id: 9, parentid: 1, name: "测试1-1-2", icon: "el-icon-files", url: "/test1", children: [] } ] }, { id: 5, parentid: 1, name: "测试1-2", icon: "el-icon-shopping-cart-1", url: "/test3", children: [] } ] }, { name: "测试2", id: 2, icon: "el-icon-menu", url: "", children: [ { id: 6, parentid: 2, name: "测试2-1", icon: "el-icon-folder-checked", url: "", children: [] }, { id: 7, parentid: 2, name: "测试2-2", icon: "el-icon-folder-remove", url: "", children: [] } ] }, { name: "测试3", id: 3, icon: "el-icon-monitor", url: "", children: [] } ]

menu.vue

<template> <div class="menu"> <div class="logo-con"> <div class="title" v-show="!collapse"> <span class="title__sider-title is-active">{{logo}}</span> </div> <div class="title" v-show="collapse"> <span class="title__sider-title el-tag--mini">LG</span> </div> </div> <el-menu :background-color="backgroundColor" :text-color="textColor" :default-active="$route.meta.pageId" :collapse="collapse" > <template v-for="item in list"> <router-link :to="item.url" :key="item.id" v-if="item.children.length===0"> <el-menu-item :index="item.id.toString()"> <i :class="item.icon"></i> <span slot="title">{{item.name}}</span> </el-menu-item> </router-link> <subMenu v-else :data="item" :key="item.id"></subMenu> </template> </el-menu> </div></template><script>import subMenu from "./subMenu";export default { name: "menuList", components: { subMenu }, data() { return { collapse: false, //是否折叠 list: [], //当行菜单数据源 backgroundColor: "#304156", //导航菜单背景颜色 textColor: "#BFCBD9", //导航菜单文字颜色 logo: "LOGO" //logo }; }};</script><style lang="scss" scoped>.el-menu { border-right: none; a { text-decoration: none; }}.logo-con { height: 64px; padding: 10px; .title { position: relative; text-align: center; font-size: 20px; height: 64px; line-height: 64px; span { padding: 0 5px 0 0; color: #409eff; font-size: 20px; } }}</style>

submenu.vue

　　 这里有个知识点functional,不懂自行百度,文档地址: https://cn.vuejs.org/v2/guide/render-function.html#search-query-sidebar

5 <!-- * @Description: * @Author: PengYH * @Date: 2019-08-06 --><template functional> <el-submenu :index="props.data.id.toString()"> <template slot="title"> <i :class="props.data.icon"></i> <span>{{props.data.name}}</span> </template> <template v-for="item in props.data.children"> <router-link :to="item.url" :key="item.id" v-if="item.children.length===0"> <el-menu-item class="subitem" :index="item.id.toString()"> <i :class="item.icon"></i> <span slot="title">{{item.name}}</span> </el-menu-item> </router-link> <sub-menu v-else :data="item" :key="item.id"></sub-menu> </template> </el-submenu></template><script>export default { name: "submenu", props: { data: [Array, Object] }};</script><style lang="scss" scoped>.el-submenu { .el-menu-item { padding: 0; }}</style>

效果图

总结

以上所述是小编给大家介绍的vue element 生成无线级左侧菜单的实现代码，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时会及时回复大家的！