为什么控制台不能打印出beforeCreate、create等

import Vue from 'vue'

import Router from 'vue-router'

import HelloWorld from '@/components/HelloWorld'

import demo1 from '@/pages/demo1/index.vue'

Vue.use(Router)

export default new Router({

  routes: [

    {

      path: '/',

      name: 'HelloWorld',

      component: HelloWorld

    },

     {

      path: '/demo1',

      name: 'demo1',

      component: demo1

    }

  ]

})

<template>

<div>

2794297493870

</div>

</template>

<script>

export default{

data(){

return{

}

},

beforeCreate(){

console.log('beforeCreate');

},

created(){

console.log('created');

},

beforeMount(){

console.log('beforeMount');

},

mounted(){

console.log('mounted');

} 

}

</script>