angular 9 login authentication example stackblitz

The auth guard uses the authentication service to check if the user is logged in, if they are logged in it returns true from the canActivate() method, otherwise it returns false and redirects the user to the login page. The main index.html file is the initial page loaded by the browser that kicks everything off. Angular route guards are attached to routes in the router config, this auth guard is used in app-routing.module.ts to protect the home page route. This allows imports to be relative to the app and environments folders by prefixing import paths with aliases instead of having to use long relative paths (e.g. It displays validation messages for invalid fields when the submit button is clicked. The Angular CLI (with Webpack under the hood) bundles all of the compiled javascript files together and injects them into the body of the index.html page so the scripts can be loaded and executed by the browser. The account service handles communication between the Angular app and the backend api for everything related to accounts. import MyComponent from '../../../MyComponent'). The Angular CLI was used to generate the base project structure with the ng new command, the CLI is also used to build and serve the application. This allows imports to be relative to the app and environments folders by prefixing import paths with aliases instead of having to use long relative paths (e.g. The alert component template contains the html for displaying alert messages at the top of the page, it renders a notification for each alert in the alerts array of the alert component below. The tutorial app code is available on GitHub at https://github.com/cornflourblue/angular-9-basic-authentication-example. If the username and password are correct then an ok response is returned with the user details, otherwise an error response is returned. Twitter. The home route maps the root path of the app to the home component, the users route maps to the users module and the account route maps to the account module, both feature module routes (/users and /account) are lazy loaded. The app module defines the root module of the application along with metadata about the module. Tutorial built with Angular 10.0.4. Instead, share your Angular improvements with the community and make a pull request. This video shows how to deploy the Angular app to Azure with a real backend api built with ASP.NET Core and an Azure SQL Server database, the full tutorial is available at Angular + .NET Core + SQL on Azure - How to Deploy a Full Stack App to Microsoft Azure. I'm a web developer in Sydney Australia and the technical lead at Point Blank Development, Create a login button. The users list component template displays a list of all users and contains buttons for adding, editing and deleting users. Routing for the Angular app is configured as an array of Routes, each component is mapped to a path so the Angular Router knows which component to display based on the URL in the browser address bar. For more info about the Angular CLI see https://angular.io/cli. If the method returns true the route is activated (allowed to proceed), otherwise if the method returns false the route is blocked. I'm a web developer in Sydney Australia and the technical lead at Point Blank Development, The main file is the entry point used by angular to launch and bootstrap the application. Angular 9 User Registration and Login Example. I've been building websites and web applications in Sydney since 1998. The imports specify which other angular modules are required by this module, and the declarations state which components belong to this module. The fake backend contains a handleRoute function that checks if the request matches one of the faked routes in the switch statement, at the moment this includes requests for handling registration, authentication and user CRUD operations. EDIT 2: In the Stackblitz example, you can see the original problem on master and the working solution on solution branches. The app routing module defines the top level routes for the angular application and generates a root routing module by passing the array of routes to the RouterModule.forRoot() method. The routes array is passed to the RouterModule.forRoot() method which creates a routing module with all of the app routes configured, and also includes all of the Angular Router providers and directives such as the directive. Angular components can subscribe() to the public user: Observable property to be notified of changes, and notifications are sent when the this.userSubject.next() method is called in the login() and logout() methods, passing the argument to each subscriber. The index.ts files in each folder are barrel files that group the exported modules from a folder together so they can be imported using the folder path instead of the full module path and to enable importing multiple modules in a single import (e.g. production & development) without updating the app code. It's implemented using the Angular HttpInterceptor interface included in the HttpClientModule, by implementing the HttpInterceptor interface you can create a custom interceptor to catch all error responses from the server in a single location. It displays validation messages for invalid fields when the submit button is clicked. The project is available on GitHub at https://github.com/cornflourblue/angular-9-registration-login-example. For more info on communicating between components with RxJS Observables see Angular 9 - Communicating Between Components with Observable & Subject. I don't believe there is an easy configuration option to change the user properties of the login form. This file is generated by the Angular CLI when creating a new project with the ng new command, I've excluded the comments in the file for brevity. The production environment config contains variables required to run the application in production. The package.json file contains project configuration information including package dependencies that get installed when you run npm install and scripts that get executed when you run npm start or npm run build etc. NOTE: You can also start the app with the Angular CLI command ng serve --open. The user model is a small class that defines the properties of a user. Requests to the get users route are handled by the getUsers() function which checks if the user is logged in by calling the new isLoggedIn() helper function. Subscribe to Feed: The ngOnInit method also calls router.events.subscribe() to subscribe to route change events so it can automatically clear alerts on route changes. Edit file auth.service.ts. The users layout component template is the root template of the users feature / section of the app, it contains the outer HTML for all /users pages and a for rendering the currently routed component. The logout() method removes the current user object from local storage, publishes null to the userSubject to notify all subscribers that the user has logged out and navigates to the /login page. It contains methods for the login, logout and registration, as well as and standard CRUD methods for retrieving and modifying user data. Adding the .logout Method. The users list component gets all users from the account service in the ngOnInit() method and makes them available to the users list template via the users property. Let's open the login.component.html file and add the following code to it … Create a LoginButtonComponent under the src / components / directory using the Angular CLI: ng generate component components/login-button --inlineStyle --skipTests The app component template is the root component template of the application, it contains the main nav bar which is only displayed for authenticated users, a global alert component, and a router-outlet component for displaying the contents of each view based on the current route / path. Windows Authentication with Angular and .Net Core Web API (5,097) WPF Drag and Drop using Behavior (2,802) Angular and .Net Core Web API Starter Application (1,618) Paging and Sorting using ASP .Net Core Razor Page,… (1,198) Azure Active Directory Authentication with OpenID… (354) Building and deploying (CI/CD) Angular applications… (155) Again, you've used the HttpClient.post method to send a POST request to the server with the registration information (email and password) then used the .pipe and tap function to run a side effect that calls the .login method to logs the user in once the registration is done.. The app component is the root component of the application, it defines the root tag of the app as with the selector property of the @Component() decorator. The form submit event is bound to the onSubmit() method of the login component. The account and users features are organised into self contained feature modules that manage their own layout, routes and components, and are hooked into the main app inside the app routing module with lazy loading. The FormGroup is part of the Angular Reactive Forms module and is bound to the login template above with the [formGroup]="loginForm" directive. Subscribe to my YouTube channel or follow me on Twitter or GitHub to be notified when I post new content. The app and code structure of the tutorial mostly follow the best practice recommendations in the official Angular Style Guide, with a few of my own tweaks here and there. On submit a user is either created or updated by calling the account service, and on success you are redirected back to the users list page with a success message. The diagram below show how our system handles User Registration and User Login processes: Angular 9 Spring Boot Security Jwt Token Authentication Work Process Diagram The AuthGuard should call an application service that can login a user and retain information about the current user. The account layout component template is the root template of the account feature / section of the app, it contains the outer HTML for all account pages and a for rendering the currently routed component. This is an example of how to setup a simple login page using Angular 9 and Basic HTTP authentication. The user model is a small class that defines the properties of a user. The app component template is the root component template of the application, it contains the main nav bar which is only displayed for authenticated users, and a router-outlet component for displaying the contents of each view based on the current route / path. The user service contains a method for getting all users from the api, I included it to demonstrate accessing a secure api endpoint with the http authorization header set after logging in to the application, the auth header is automatically set with basic authentication credentials by the basic authentication interceptor. This file is generated by the Angular CLI when creating a new project with the ng new command, I've excluded the comments in the file for brevity. The ngOnDestroy() method unsubscribes from the alert service and router when the component is destroyed to prevent memory leaks from orphaned subscriptions. Routing allows users to go from one component to another component. Angular 9, TypeScript, Authentication and Authorization, Security, Basic Authentication, Share: The form element uses the [formGroup] directive to bind to the form FormGroup in the register component below, and it binds the form submit event to the onSubmit() handler in the register component using the angular event binding (ngSubmit)="onSubmit()". I didn't worry about unsubscribing from the observable here because it's the root component of the application and will only be destroyed when the angular app is closed. The auth guard uses the account service to check if the user is logged in, if they are logged in it returns true from the canActivate() method, otherwise it returns false and redirects the user to the login page along with the returnUrl in the query parameters. Subscribe to my YouTube channel or follow me on Twitter or GitHub to be notified when I post new content. Here are the main project files that contain the application logic, I left out some files that were generated by Angular CLI ng new command that I didn't change. The tsconfig.json file configures how the TypeScript compiler will convert TypeScript into JavaScript that is understood by the browser. The user property exposes an RxJS observable (Observable) so any component can subscribe to be notified when a user logs in, logs out or updates their profile. Next, you need to implement a .logout method that logs out the user. It's implemented using the HttpInterceptor interface included in the HttpClientModule, by implementing the HttpInterceptor interface you can create a custom interceptor to modify http requests before they get sent to the server. Before using reactive forms in Angular 9 we need to import FormsModule and ReactiveFormsModule in the application module. The component uses reactive form validation to validate the input fields, for more information about angular reactive form validation see Angular 9 - Reactive Forms Validation Example. Example 1: Using *ngIf to “hide” the NavBar. It subscribes to the user observable in the authentication service so it can reactively show/hide the main navigation bar when the user logs in/out of the application. This video shows how to deploy the Angular app to Azure with a real backend api built with ASP.NET Core and an Azure SQL Server database, the full tutorial is available at Angular + .NET Core + SQL on Azure - How to Deploy a Full Stack App to Microsoft Azure.. Let's get started started! import { AccountService, AlertService } from '@app/_services'). 4.3 Login HTML Template. Full documentation is available on the https://docs.npmjs.com/files/package.json. The home component defines an angular 9 component that gets all users from the user service and makes them available to the template via a users array property. This is done by a class that implements the Angular HttpInterceptor interface, for more information on Angular HTTP Interceptors see https://angular.io/api/common/http/HttpInterceptor or this article. Each feature has it's own folder (account, home & users), other shared/common code such as components, services, models, helpers etc are placed in folders prefixed with an underscore _ to easily differentiate them from features and group them together at the top of the folder structure. The tsconfig.json file configures how the TypeScript compiler will convert TypeScript into JavaScript that is understood by the browser. Read Also: Angular 9 Tutorial: Learn to Build a CRUD Angular App Quickly. For more information on Angular Routing and Navigation see https://angular.io/guide/router. The secure endpoint in the example is a fake one implemented in the fake backend provider. Some features used by Angular 9 are not yet supported natively by all major browsers, polyfills are used to add support for features where necessary so your Angular 9 application works across all major browsers. The alert service acts as the bridge between any component in an Angular application and the alert component that actually displays the alert messages. The imports specify which other angular modules are required by this module, and the declarations state which components belong to this module. The user object is then published to all subscribers with the call to this.userSubject.next(user);. You can build your own backend api or start with one of the below options: The app and code structure of the tutorial mostly follows the best practice recommendations in the official Angular Style Guide, with a few of my own tweaks here and there. Atom, Most of the file is unchanged from when it was generated by the Angular CLI, only the paths property has been added to map @app and @environments to the /src/app and /src/environments directories. Http interceptors are added to the request pipeline in the providers section of the app.module.ts file. Full documentation is available at https://docs.npmjs.com/files/package.json. The form is then bound to the