使用vue-router切换页面时，获取上一页url以及当前

export default {
  mixins: [],
  vuex: {
   actions: {fetchCertificates},
  },
  data() {
   return {}
  },
  route: {
   data() {
    this.$root.showLoading();
    return this.fetchCertificates().then((res) => {
     this.$root.dismissLoading();
     if (res.error) return this.$root.toastError(res.error);
     if(res.data.certificates.length >0){
      return res.data;
     }else{
      console.log(this.$route ,"----当前页面的url信息----");
     }
    });
   },
   canActivate (transition) {
    console.log(transition,"======上一个页面的url信息=======");
    transition.next();
   }
  },
 }