This is a beginner angular question.

My Angular Application comprises of multiple feature modules.I used authguard by generating guard from the angular-cli and then I use CanActivate in my app-routing module like so :

import { NgModule } from '@angular/core';

import { Routes, RouterModule } from '@angular/router';

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



const routes: Routes = [

{path:'login',loadChildren:'./login/login.module#LoginModule',canActivate: 

[AuthGuard]},

{path:'home', loadChildren:'./user/user.module#UserModule',canActivate: 

[AuthGuard]},

{path:'cart', 

loadChildren:'./cart/cart.module#CartModule',canActivate:[AuthGuard]},

 {path:'customer',loadChildren:'./customer/customer.module#CustomerModule',canActivate:[AuthGuard]}

];



@NgModule({

imports: [RouterModule.forRoot(routes)],

exports: [RouterModule]

})

export class AppRoutingModule { }

In my auth guard I have written the condition to prevent the user from accessing unauthorized routes :

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

import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot } from 

'@angular/router';

import { Observable } from 'rxjs/Observable';

import { Router } from '@angular/router';



@Injectable()

export class AuthGuard implements CanActivate {

constructor(private router: Router) { }

canActivate(

next: ActivatedRouteSnapshot,

state: RouterStateSnapshot): Observable<boolean> | Promise<boolean> | boolean 

{

  if([user,customer,cart].indexOf(localStorage.pass)>=0){alert(auth 

guard!);

return true;}

else 

this.router.navigate(['/login']);

}

}

after building I get a warning
WARNING in Duplicated path in loadChildren detected during a rebuild. We will take the latest version detected and override it to save rebuild time. You should perform a full build to validate that your routes don't overlap.

So i googled it and found this comment ,after adding comma to the last path the warning disappeared.

But after that I logged in to my application and the following message appeared in the console :
Throttling history state changes to prevent the browser from hanging
and app got stuck.

Any ideas why?

EDIT : I finally got it to work by using 'canLoad' instead of 'canActivate',
but it would be great if someone could provide some more insight regarding this issue.