npm vue 路由之一级路由（npm默认已经集成了vue）
文档https://v3.router.vuejs.org/zh/installation.html
npm install vue-router@3.5.2 --save

1.在App.vue上面添加

<router-view></router-view>

2.在main.js上面添加
import VueRouter from “vue-router”
import Test from “@/components/Test”;
import HelloWorld from “@/components/HelloWorld”;
Vue.use(VueRouter)

const routes = [
{ path: ‘/home’, component: Test },
{ path: ‘/about’, component: HelloWorld },
]
const router =new VueRouter({
routes, // routes: routes 的缩写
})

new Vue({
render: h => h(App),
router,
}).$mount(‘#app’)
npm run serve 运行 http://127.0.0.1:8080