How can I prevent the logout button in the navbar from being displayed when a user lands on the login page? The user's information is stored in local storage, and this works well for all pages except when the user returns to the login page using the back button. Is there a way to address this issue effectively? Any assistance would be greatly appreciated.
To prevent users from returning to the login page, you can implement guards using CanActivate.
import { Injectable } from '@angular/core';
import {CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, UrlTree, Router} from '@angular/router';
import { Observable } from 'rxjs';
@Injectable({
providedIn: 'root'
})
export class CanActivateAuthGuard implements CanActivate {
constructor(private router: Router) {
}
canActivate(
next: ActivatedRouteSnapshot,
state: RouterStateSnapshot): Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree {
if (sessionStorage.getItem('user') !== null && localStorage.getItem('token')) {
console.log('A logged-in user is trying to re-login');
this.router.navigateByUrl('/home');
return false;
}
return true;
}
}
In your routing module, add the following:
{ path: 'loginpage',
loadChildren: () => import('./features/auth/auth.module').then(m => m.AuthModule),
canActivate: [CanActivateAuthGuard]
},
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