How do I implement routing guards in Angular CLI?

How do I implement routing guards in Angular CLI?

To implement routing guards in Angular CLI, you can create a guard using the command: ng generate guard guardName. This will create a guard file where you can define your logic.

What types of routing guards are available?

There are several types of routing guards in Angular: CanActivate, CanActivateChild, CanDeactivate, Resolve, and CanLoad. Each serves a different purpose in controlling access to routes.

Can you give me an example of a CanActivate guard?

Sure! A CanActivate guard checks if a user is logged in before allowing access to a route. You can implement it like this:

import { Injectable } from '@angular/core';
import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, 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(
    next: ActivatedRouteSnapshot,
    state: RouterStateSnapshot): boolean {
    if (this.authService.isLoggedIn()) {
      return true;
    } else {
      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 }
];