Vue routing error: TypeError: Cannot read property 'matched' of undefined

use vue to route
js files as follows

import Vue from "vue"
import VueRouter from "vue-router"
import Daohangafter from "./vue/daohangafter.vue"
new Vue({
    el:"-sharpfive",
    template:"<div><h1></h1><hr/><Daohangafter></Daohangafter></div>",
    components:{
        Daohangafter
    }
})

the vue file is as follows

<template>
<div>
<h2></h2>
<div>
<router-link to="/shuju/one">/shuju/one</router-link>
<router-link to="/shuju/two">/shuju/two</router-link>
<router-link to="/shuju/three">/shuju/three</router-link>
</div>
<div v-if="loading">Loading...</div>
<router-view>
</router-view>
</div>
</template>
<script>
import Vue from "vue"
import VueRouter from "vue-router"
Vue.use(VueRouter)
const Pagepages={
    template:"<div>fkafnbkfapdp</div>"
}
const router=new VueRouter({
    mode:"history",
    base:__dirname,
    routes:[
       {
       path:"/shuju/:id",
        name:"shuju",
        component:Pagepages
   }
    ]
})

export default{
    name:"daohangafter",
    data(){
    return{
      loading:false,
      post:null
    }
    }
}
</script>

check the effect in the browser and find an error

clipboard.png
Why is the error reported and where is the problem? How to correct it?

Mar.09,2021

  export default {
    name: 'daohangafter',
    data() {
      return {
        loading: false,
        post: null
      }
    },
    router
  }
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3ba6f-2c2b6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3ba6f-2c2b6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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