我正在使用 vue js 3，但我遇到了这个错误。我尝试使用路由器。
我的 main.js 文件在这里：
import { createApp } from 'vue'
import App from './App.vue'
import VueRouter from 'vue-router' // i added this
import Vue from 'vue'; // and this
Vue.use(VueRouter); // and this
createApp(App).mount('#app')我的 package.json 文件在这里：
{
"name": "router",
"version": "0.1.0",
"private": true,
"scripts": {
"serve": "vue-cli-service serve",
"build": "vue-cli-service build",
"lint": "vue-cli-service lint"
},
"dependencies": {
"core-js": "^3.6.5",
"vue": "^3.0.0",
"vue-router": "^3.5.1"
},
"devDependencies": {
"@vue/cli-plugin-babel": "~4.5.0",
"@vue/cli-plugin-eslint": "~4.5.0",
"@vue/cli-service": "~4.5.0",
"@vue/compiler-sfc": "^3.0.0",
"babel-eslint": "^10.1.0", …