vue中的面包屑导航组件实例代码

<template>  <el-breadcrumb class="app-breadcrumb" separator="/">   <transition-group>    <el-breadcrumb-item v-for="(item,index) in levelList" :key="item.path" v-if="item.meta.title">     <span  v-if='item.redirect==="noredirect"||index==levelList.length-1' class="no-redirect">{{item.meta.title}}</span>     <router-link  v-else :to="item.redirect||item.path">{{item.meta.title}}</router-link>    </el-breadcrumb-item>   </transition-group>  </el-breadcrumb></template><script>  export default {    name: "idnex",   data(){     return {      levelList:null     }   },   created() {    this.getBreadcrumb()   },   watch:{    $route(){     this.getBreadcrumb()    }   },   methods:{    getBreadcrumb(){      let matched=this.$route.matched.filter(item=>item.name)//$route.matched 将会是一个包含从上到下的所有对象 (副本)。      const first=matched[0]      if(first && first.name !=='dashboard'){//$route.name当前路由名称 ；$route.redirectedFrom重定向来源的路由的名字       matched=[{ path: '/dashboard', meta: { title: 'dashboard' }}].concat(matched)      }      this.levelList=matched     }   }  }</script><style rel="stylesheet/scss" lang="scss" scoped> .app-breadcrumb.el-breadcrumb {  display: inline-block;  font-size: 14px;  line-height: 50px;  margin-left: 10px;  .no-redirect {   color: #97a8be;   cursor: text;  } }</style>

<template><el-breadcrumb><el-breadcrumb-item separator = '/' v-for = "(item,index) in breadlist" :key = 'index' :to="{path: item.path}">{{item.meta.CName}}</el-breadcrumb-item> </el-breadcrumb></template>js部分<script>export default {data(){return {breadlist: ''}},created() {this.getBread();},methods:{getBread(){this.breadlist = this.$route.matched;this.$route.matched.forEach((item,index)=>{//先判断父级路由是否是空字符串或者meta是否为首页，直接复写路径到根路径item.meta.CName === '首页' ? item.path = '/' : this.$route.path === item.path;});}},watch:{$route(){this.getBread();}}}</script>