routerView.vue文件 用于三级页面跳转

<el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item v-for="item in breList" :key="item.path" :to="{ path: item.path }"><i v-if="item.meta.title=='首页'" class="el-icon-s-home"></i>{{item.meta.title=='首页'" class="el-icon-s-home"></i>{{item.meta.title}}</el-breadcrumb-item>
</el-breadcrumb>
<router-view></router-view>

'$route':{
                deep:true,
                immediate:true,
                handler(n,o){
                    // this.breList = [...n.matched]
                    this.breList = []
                    n.matched.forEach(item=>{
                        if(!item.parent || item.parent.redirect != n.path){                                
                            this.breList.push(item)
                        }
                }
}
    

router.js文件