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如果我重新加载页面 (F5) 或将其打开到新选项卡中，我想使用相同的路线。

例如，我使用以下路线：

http://localhost:4200/show-category/-KmhdoAJO0WQbTzS9gll

如果我按 F5 这是结果：

http://localhost:4200/

问题是它显示与以前相同的组件，但由于缺少 id 没有值。应用程序崩溃。

（我在另一个问题上坐了几个小时，也许我现在还不够专注，无法找到错误。）

我希望有一个人可以很快帮助我。

const appRoutes: Routes =  [
  { path: '', component: HomeComponent },
  { path: 'access-denied', component: AccessDeniedComponent },
  { path: 'add-category', component: AddCategoryComponent },
  { path: 'add-reply/:id', component: AddReplyComponent },
  { path: 'add-topic/:id', component: AddTopicComponent },
  { path: 'change-user-roles', component: ChangeUserRolesComponent },
  { path: 'edit-category/:id', component: EditCategoryComponent },
  { path: 'edit-reply/:id', component: EditReplyComponent },
  { path: 'edit-topic/:id', component: EditTopicComponent },
  { path: 'delete-category/:id', component: DeleteCategoryComponent },
  { path: 'delete-reply/:id', component: DeleteReplyComponent },
  { path: 'delete-topic/:id', component: DeleteTopicComponent },
  { path: 'register-user', component: RegisterUserComponent },
  { path: 'show-category/:id', component: ShowCategoryComponent },
  { path: 'show-topic/:id', component: ShowTopicComponent },
  { path: 'user-profile', component: UserProfileComponent },
]
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