JS：CDN方式引入Vue-Router

<div id="app">
  <p>$route.name: {{$route.name}}</p>
  <p>$route.path: {{$route.path}}</p>
  <p>$route.query: {{$route.query}}</p>
</div>
<script src="/static/js/vue.js"></script>
<script src="/static/js/vue-router.js"></script>
<script>
  const router = new VueRouter({
    mode: "history", // 默认使用hash模式，url会出现#
  });
  const app = new Vue({
    router,
    el: "#app",
  });
</script>