vue router动态路由设置参数可选问题

new Router({
  routes: [
    {
      path: '/user/:page/:id',
      name: 'User',
      ponent: () => import('pages/user')
    },
    {
      path: '',
      redirect: '/home'
    }
  ]
})

this.$router.options.routes[0].children.push({//插入路由
 name:'list',
 path: 'list',
 ponent: resolve => require(['../template/list.vue'], resolve)//将组件用require引进来
});
this.$router.addRoutes(this.$router.options.routes);//调用addRoutes添加路由

export default new Router({
 routes: [
  {
   path: '/',
 
   ponent: index,
  },
  {
   path: '/login',
   name: 'login',
   ponent: login
  }
 ]