How do I implement authentication guards in Angular?

How do I implement authentication guards in Angular?

To implement authentication guards in Angular, you can create a guard service that implements the CanActivate interface.

What is the purpose of the CanActivate interface?

The CanActivate interface is used to determine if a route can be activated based on certain conditions, like user authentication.

Can you show me a code example?

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.isLoggedIn()) {
      return true;
    } else {
      this.router.navigate(['/login']);
      return false;
    }
  }
}

How do I use this guard in my routing module?

You can use the guard in your routing module like this:

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