在Angular 5中，如何避免某些组件/页面拥有NavMenuComponent？

import { Injectable } from '@angular/core';
import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, Router } from '@angular/router';

@Injectable()
export class AuthGuard implements CanActivate {
  constructor(private router: Router) {}

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
    // 在这里实现判断逻辑，例如检查用户是否登录或是否有权限访问该路由
    const hasNavMenu = false; // 根据具体情况设置是否有NavMenuComponent

    if (!hasNavMenu) {
      return true; // 允许访问该路由
    } else {
      this.router.navigate(['/']); // 重定向到其他页面，例如首页
      return false; // 不允许访问该路由
    }
  }
}

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { HomeComponent } from './home.component';
import { AboutComponent } from './about.component';
import { AuthGuard } from './auth.guard';

const routes: Routes = [
  { path: '', component: HomeComponent },
  { path: 'about', component: AboutComponent, canActivate: [AuthGuard] },
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }