Vue Router(第四章)

{
    path: '/b',
    name: 'B',
    component: () => import('../components/B.vue'),
    children: [
      {
        path: '', //    /b/c 为空代表默认子路由
        name: 'C',
        component: () => import('../components/C.vue'),
      },
      {
        path: 'd', // /b/d
        name: 'D',
        component: () => import('../components/D.vue'),
      },
    ],
  },