Auth guard provide lifecycle event called canActivate. The canActivate is like a constructor. It will be called before accessing the routes. The canActivate has to return true to access the page.
What is the use of Auth guard in Angular?
RouterOutlet is a directive provided by Angular which is used to load the different components based on the router state. Whenever the user clicks on the link, at a time the activated component will be rendered and added to HTML DOM inside the router-outlet directive.
What is Auth guard in Angular?
Auth-guard makes use of CanActivate interface and it checks for if the user is logged in or not. If it returns true, then the execution for the requested route will continue, and if it returns false, that the requested route will be kicked off and the default route will be shown. Prerequisites.
What is an Auth guard?
AuthGuard is a class which implements the interface CanActivate , to decide whether the user has access/permission to view specific page / route / path in the application or not. This will be useful when we need authentication/authorization based control over the application.
How do guards work Angular?
The Angular router’s navigation guards allow to grant or remove access to certain parts of the navigation. Another route guard, the CanDeactivate guard, even allows you to prevent a user from accidentally leaving a component with unsaved changes.
What is CanDeactivate in Angular?
CanDeactivate is a TypeScript interface that needs to be implemented by a component to create a route guard. This guard will be used by the router to decide if the route can be deactivated. It can be implemented in any Angular component using the canDeactivate method of the interface.
What is pipe in Angular?
Pipes are simple functions to use in template expressions to accept an input value and return a transformed value. Pipes are useful because you can use them throughout your application, while only declaring each pipe once.
What is injectable in angular?
Dependency injection, or DI, is a design pattern in which a class requests dependencies from external sources rather than creating them. Angular’s DI framework provides dependencies to a class upon instantiation. You can use Angular DI to increase flexibility and modularity in your applications.
What is ActivatedRouteSnapshot in angular?
Contains the information about a route associated with a component loaded in an outlet at a particular moment in time. ActivatedRouteSnapshot can also be used to traverse the router state tree.
What is Auth :: Routes ();?
Auth::routes() is just a helper class that helps you generate all the routes required for user authentication. You can browse the code here https://github.com/laravel/framework/blob/5.3/src/Illuminate/Routing/Router.php instead.
What is Auth in Angular?
The authentication service is used to login & logout of the Angular app, it notifies other components when the user logs in & out, and allows access the currently logged in user. … The user object is then published to all subscribers with the call to this.
Can activate and can activate child?
canActivate will only execute when the parent component is not yet created. For example, if we navigate to the parent route it will be called, if we then navigate to a child route it will not. If we directly navigate to the child route, the canActivate guard will also be executed.
What is the purpose of a route Guard?
Angular’s route guards are interfaces which can tell the router whether or not it should allow navigation to a requested route. They make this decision by looking for a true or false return value from a class which implements the given guard interface.
What is decorator in angular?
Decorators are a design pattern that is used to separate modification or decoration of a class without modifying the original source code. In AngularJS, decorators are functions that allow a service, directive or filter to be modified prior to its usage.