Changing the default route in Angular 2 based on conditions

I'm currently developing an application where, upon entering the page, the default route for the user is the "Login" page. However, I want to implement a condition based on whether the user has a local storage variable (id) set. If this variable exists, a method called isAuthenticated() will return true and the user should be redirected to the "Polls" page instead of the "Login" page.

I have thought of two approaches to tackle this issue:

1. Changing the default page: If the isAuthenticated() method returns true, the default page should be changed to "Polls". Otherwise, it should remain as "Login".

2. Redirecting the user: If the isAuthenticated() method returns true, the user should be automatically redirected to the "Polls" page.

Which approach would be more effective in achieving conditional routing? How can I implement either or both of these points?

Below is my routing configuration with the implementation of the isAuthenticated() method:

import {Component} from 'angular2/core'
import {HTTP_PROVIDERS, Http} from 'angular2/http';
import 'rxjs/Rx'; // load the full rxjs
import {RouteConfig, ROUTER_DIRECTIVES, Router} from 'angular2/router';


import { PollsComponent } from './pollslist/pollslist.component'
import { Login } from './login/login'

@Component({
    selector: 'my-app',
    templateUrl: 'app/app.component.html',
    directives: [ROUTER_DIRECTIVES, Login, PollsComponent],
    providers: [HTTP_PROVIDERS]
})

@RouteConfig([
    { path: '/login', name: 'Login', component: Login, useAsDefault: true },
    { path: '/polls', name: 'Polls', component: PollsComponent }

])

export class AppComponent {
    isAuthenticated() {
        if (localStorage.getItem('id')) {
            return true;
        } else {
            return false;
        }

    }

}

Answer №2

When it comes to the Angular router, there is an important parameter called loader:

loader : () => Promise<Type>

This parameter enables the dynamic and asynchronous determination of component types.

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