vue2.0 elementUI制作面包屑導(dǎo)航欄

var routeList = [];
router.beforeEach((to, from, next) => {
 var index = -1;
 for(var i = 0; i < routeList.length; i++) {
 if(routeList[i].name == to.name) {
 index = i;
 break;
 }
 }
 if (index !== -1) {
//如果存在路由列表，則把之后的路由都刪掉
 routeList.splice(index + 1, routeList.length - index - 1);
 } else if(to.name != '登錄'){
 routeList.push({"name":to.name,"path":to.fullPath});
 }
 to.meta.routeList = routeList;
 next()
});

<template>
 <div class="level-bread">
 <el-breadcrumb separator="/">
 <el-breadcrumb-item v-for="item in realList" :to="item.path">{{item.name}}</el-breadcrumb-item>
 </el-breadcrumb>
 </div>
</template>

<script>
 export default {
 name: "lelve-bread",
 created(){
 this.getRoutePath();
 },
 data() {
 return {
 realList: []
 }
 },
 methods:{
 getRoutePath() {
 this.realList = this.$route.meta.routeList;
 }
 },
 beforeRouteEnter(to,from, next) {
 next((vm) => {
 vm.realList = to.meta.routeList;
 });
 },
 // watch:{
 // $route:function(newV,oldV) {
 // this.realList =newV.meta.routeList;
 // }
 // }
 }
</script>

const Foo = {
 template: `...`,
 beforeRouteEnter (to, from, next) {
 // 在渲染該組件的對(duì)應(yīng)路由被 confirm 前調(diào)用
 // 不！能！獲取組件實(shí)例 `this`
 // 因?yàn)楫?dāng)守衛(wèi)執(zhí)行前，組件實(shí)例還沒(méi)被創(chuàng)建
 },
 beforeRouteUpdate (to, from, next) {
 // 在當(dāng)前路由改變，但是該組件被復(fù)用時(shí)調(diào)用
 // 舉例來(lái)說(shuō)，對(duì)于一個(gè)帶有動(dòng)態(tài)參數(shù)的路徑 /foo/:id，在 /foo/1 和 /foo/2 之間跳轉(zhuǎn)的時(shí)候，
 // 由于會(huì)渲染同樣的 Foo 組件，因此組件實(shí)例會(huì)被復(fù)用。而這個(gè)鉤子就會(huì)在這個(gè)情況下被調(diào)用。
 // 可以訪問(wèn)組件實(shí)例 `this`
 },
 beforeRouteLeave (to, from, next) {
 // 導(dǎo)航離開(kāi)該組件的對(duì)應(yīng)路由時(shí)調(diào)用
 // 可以訪問(wèn)組件實(shí)例 `this`
 }
}