vue 2.0 and elementUI implement breadcrumb navigation bar method code

This article mainly shares with you the code of the breadcrumb navigation bar method implemented by vue 2.0 and elementUI. I hope it can help you.

Main.js

var routeList = [];
router.beforeEach((to, from, next) => {
  var index = -1;
  for(var i = 0; i <p><strong>2. Use watch or beforeRouteEnter in the component to be used </strong></p><pre class="brush:php;toolbar:false"><template>
    <p>
      <el-breadcrumb>
        <el-breadcrumb-item>{{item.name}}</el-breadcrumb-item>
      </el-breadcrumb>
    </p>
</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>

Both are available.
It should be noted that beforeRouteEnter cannot access this at this time.

Official website description https://router.vuejs.org/zh-c...

const Foo = {
  template: `...`,
  beforeRouteEnter (to, from, next) {
    // 在渲染该组件的对应路由被 confirm 前调用
    // 不！能！获取组件实例 `this`
    // 因为当守卫执行前，组件实例还没被创建
  },
  beforeRouteUpdate (to, from, next) {
    // 在当前路由改变，但是该组件被复用时调用
    // 举例来说，对于一个带有动态参数的路径 /foo/:id，在 /foo/1 和 /foo/2 之间跳转的时候，
    // 由于会渲染同样的 Foo 组件，因此组件实例会被复用。而这个钩子就会在这个情况下被调用。
    // 可以访问组件实例 `this`
  },
  beforeRouteLeave (to, from, next) {
    // 导航离开该组件的对应路由时调用
    // 可以访问组件实例 `this`
  }
}

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