在开发当中会遇到一些组件的封装，侧边栏导航的封装也是很实用的。下面代码拿走直接用！！！

<template><div><el-aside width="200px"><el-menudefault-active="1"background-color="#545c64"text-color="#fff":unique-opened="true"active-text-color="#ffd04b"><div v-for="(item,index) in list2" :key="index"><el-submenu v-if="item.children && item.children.length" :index="item.path" :key="item.path" ><template slot="title" ><img :src="item.icon" alt=""><span>{{item.name}}</span></template><template v-for="itemChild in item.children"> <el-menu-item  :index="itemChild.path" :key="itemChild.path" @click="changeurl(itemChild.path,itemChild.name)"><img :src="childrenIndex == itemChild.name ? itemChild.active : itemChild.icon" alt=""><span slot="title">{{itemChild.name}}</span></el-menu-item></template></el-submenu><el-menu-item v-else :index="item.path" :key="item.path" @click="changeurl2(item.path,item.name)"><img :src="childrenIndex == item.name ? item.active : item.icon" alt=""><span slot="title">{{item.name}}</span></el-menu-item></div></el-menu></el-aside></div>
</template>
<script>
export default {data(){return{childrenIndex:'',list2:[{path: "/4",name: "导航一",// icon:'el-icon-menu'icon:require('../assets/image/menu6_4.png'),active: require('../assets/image/menu6_4_c.png'),},{path: "/5",name: "导航二",// icon:'el-icon-menu'icon:require('../assets/image/menu6_c.png'),children: [{path: "/54",name: "导航2-1-1",icon:require('../assets/image/menu13_c.png'),active: require('../assets/image/menu13.png'),}, {path: "/55",name: "导航3-1-2",icon:require('../assets/image/menu12_c.png'),active: require('../assets/image/menu12.png'),},]},{path: "/6",name: "导航三",// icon:'el-icon-menu'icon:require('../assets/image/menu6_c.png'),children: [{path: "/57",name: "导航4-1-1",icon:require('../assets/image/icon/1.png'),active: require('../assets/image/icon/2.png'),}, {path: "/58",name: "导航4-1-2",icon:require('../assets/image/icon/3.png'),active: require('../assets/image/icon/4.png'),},]}, {path: "/47",name: "导航四",// icon:'el-icon-menu'icon:require('../assets/image/icon/5.png'),active: require('../assets/image/icon/6.png'),},]}},methods:{changeurl(a,b){this.childrenIndex=b;console.log(a);console.log(b);console.log(this.childrenIndex);},changeurl2(c,d){console.log(c)console.log(d)this.childrenIndex=d;}}
}
</script>
<style>.el-submenu__title{background: url(../assets/image/left_menu.png) no-repeat !important;}.el-menu-item.is-active {background: url(../assets/image/left_menu_c.png) no-repeat;}.el-menu-item {height: 58px;line-height: 39px;align: center;color: #fff;margin-top: 10px;background: url(../assets/image/left_menu.png) no-repeat;}.el-submenu .el-menu-item.is-active{background: url(../assets/image/mb2.png) no-repeat;}.el-submenu .el-menu-item{width: 180px;height: 33px;line-height: 33px;background: url(../assets/image/children-bg.png) no-repeat;}
</style>