How to Install and Configure Auth0 by Okta into Angular 16 | Auth0 into Angular | Integrate Auth0 into Angular 16

 

Introduction

• Brief overview of authentication and the need for secure user authentication in web applications.
• Introduction to Auth0 and Okta as popular identity providers.
• Overview of the article's goal: integrating Auth0 with Angular 16 using Okta.

Prerequisites

• List of prerequisites for readers, including Node.js, Angular CLI, and an Auth0 and Okta account.

Setting Up Auth0

Create an Auth0 Account

➨ Sign up for an Auth0 account if you don't have one.

➨ Create a new Auth0 application for your Angular project.

Configure Auth0 Application

➨ Set up your Auth0 application with the necessary settings.

➨ Obtain Auth0 credentials (Client ID and Client Secret).

Angular Application Setup

Step 1:- Create a new project through Angular CLI

ng new auth0-angular-demo ( You can write the name you want ).

Step 2:- Install Auth 0 SDK

npm install @auth0/auth0-angular

Step 3:- Configure Auth0 in Angular

➨ In your Angular app, configure Auth0 in the app.module.ts:

// app.module.ts

import { AuthModule } from '@auth0/auth0-angular';

@NgModule({

  imports: [

    AuthModule.forRoot({

      domain: 'your-auth0-domain',

      clientId: 'your-auth0-client-id',

    }),

  ],

})

export class AppModule {}

Replace 'your-auth0-domain' and 'your-auth0-client-id' with your Auth0 account's domain and client ID.

Step 4:- Use Auth0 in Your Components

➩ Login and Logout

Create a service to handle authentication actions:

// auth.service.ts

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

import { AuthService } from '@auth0/auth0-angular';

@Injectable({

  providedIn: 'root',

})

export class AuthService {

  constructor(public auth: AuthService) {}

  login(): void {

    this.auth.loginWithRedirect();

  }

  logout(): void {

    this.auth.logout({ returnTo: window.location.origin });

  }

}

➩ Implement Login Button in a Component

// app.component.ts

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

import { AuthService } from './auth.service';

@Component({

  selector: 'app-root',

  template: `

    <div *ngIf="auth.auth.user$ | async as user; else login">

      <p>Hello, {{ user.name }}!</p>

      <button (click)="auth.logout()">Logout</button>

    </div>

    <ng-template #login>

      <button (click)="auth.login()">Login</button>

    </ng-template>

  `,

})

export class AppComponent {

  constructor(public auth: AuthService) {}

}

➩ Protect Routes with AuthGuard

To protect specific routes and ensure users are authenticated, you can use the AuthGuard provided by Auth0:

// auth.guard.ts

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

import { ActivatedRouteSnapshot, CanActivate, RouterStateSnapshot, UrlTree } from '@angular/router';

import { Observable } from 'rxjs';

import { AuthService } from './auth.service';

@Injectable({

  providedIn: 'root',

})

export class AuthGuard implements CanActivate {

  constructor(private auth: AuthService) {}

  canActivate(

    route: ActivatedRouteSnapshot,

    state: RouterStateSnapshot

  ): Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree {

    return this.auth.isAuthenticated$;

  }

}

➩ Secure Routes in `app-routing.module.ts`.

// app-routing.module.ts

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

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

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

import { HomeComponent } from './home/home.component';

const routes: Routes = [

  { path: '', component: HomeComponent, canActivate: [AuthGuard] },

  // ... other routes

];

@NgModule({

  imports: [RouterModule.forRoot(routes)],

  exports: [RouterModule],

})

export class AppRoutingModule {}

Ensure that you've created the necessary components like HomeComponent and update the routes accordingly.

➩ Now Test the application 

ng server -o ( o for open )

Notes:- Visit the Docs file in Auth0 Website also ( Link )