Angular: Guard

guard.service.ts

import { Injectable } from '@angular/core';
import { CanActivate } from '@angular/router';

@Injectable()
export class AuthGuard implements CanActivate {
  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean>|Promise<boolean>|boolean {
    return true;
  }
}

routing.module.ts

import { AuthGuard } from './guard.service';

const adminRoutes: Routes = [
  {
    path: 'admin',
    component: AdminComponent,
    canActivate: [AuthGuard]
  }
];