/Javascript/AngularJS/How to redirect from login page to other page if user is already logged in in angular using jwt

How to redirect from login page to other page if user is already logged in in angular using jwt

const ROUTES = [
  { path: '', redirectTo: 'home', pathMatch: 'full' },
  { path: 'login', component: LoginComponent },
  { path: 'register', component: RegisterComponent },
  { path: 'home', component: HomeComponent },
  { path: 'books', component: BookComponent,canActivate:[AuthGuardService] },
  { path: 'book-details/:id', component: BookDetailComponent,canActivate:[AuthGuardService] },
  { path: 'book-create', component: BookCreateComponent,canActivate:[AuthGuardService] },
];

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


@Injectable()
export class AuthGuardService implements CanActivate {

    constructor( public router: Router) { }

    canActivate(): boolean {

        if (sessionStorage.getItem('id') == null) {
            this.router.navigate(['home']);
            return false;
        }
        return true;
    }
}

Source: stackoverflow.com

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