How do I use authentication guards in Angular CLI?

How do I use authentication guards in Angular CLI?

To use authentication guards in Angular CLI, you first need to create a guard using the command: ng generate guard auth. This will create a guard file where you can implement your logic.

What kind of logic should I implement in the guard?

In the guard, you typically check if the user is authenticated. You can use a service to verify the user's authentication status and return true or false accordingly.

Can you show me an example of the guard implementation?

Sure! Here's a simple example:

import { Injectable } from '@angular/core';
import { CanActivate, Router } from '@angular/router';
import { AuthService } from './auth.service';

@Injectable({ providedIn: 'root' })
export class AuthGuard implements CanActivate {
  constructor(private authService: AuthService, private router: Router) {}

  canActivate(): boolean {
    if (this.authService.isAuthenticated()) {
      return true;
    }
    this.router.navigate(['/login']);
    return false;
  }
}

How do I apply this guard to a route?

You can apply the guard to a route in your routing module like this:

const routes: Routes = [
  { path: 'protected', component: ProtectedComponent, canActivate: [AuthGuard] },
  { path: 'login', component: LoginComponent }
];