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How does Inertia handle user authentication with Laravel


Inertia handles user authentication with Laravel by leveraging Laravel's built-in authentication features and extending them to work seamlessly with Inertia's single-page application (SPA) architecture. Here are the key points:

1. Using Laravel's Default Authentication:
- Inertia uses Laravel's default session-based authentication, which means that users are authenticated using Laravel's built-in authentication mechanisms.
- This approach eliminates the need to create a separate API for authentication, as Inertia can directly interact with Laravel's authentication system[1][2][3].

2. Sharing the Authenticated User:
- Inertia's `share` method is used to share the authenticated user with the frontend. This allows the frontend to access the user object and use it for authorization checks[2].

3. Authorization Checks:
- Authorization checks are performed on the frontend using the user object shared by Inertia. This ensures that the frontend can dynamically display or hide content based on the user's permissions[2].

4. Transforming Data:
- Data transformation is crucial for authorization checks. Inertia's `share` method can be used to transform data before it reaches the frontend, making it easier to handle complex authorization requirements[2].

5. Starter Kits:
- Laravel provides starter kits like Laravel Breeze and Laravel Jetstream that offer beautifully designed starting points for incorporating authentication into your fresh Laravel application. These kits include scaffolding options based on Livewire or Inertia, making it easy to integrate authentication with your Inertia application[4].

By leveraging these features, Inertia provides a seamless and efficient way to handle user authentication with Laravel, allowing developers to focus on building their application without worrying about the intricacies of authentication and authorization.

Citations:
[1] https://atlas.dev/blog/using-inertia-with-laravel-in-2024
[2] https://sebastiandedeyne.com/handling-authorization-in-a-laravel-and-inertia-application
[3] https://github.com/inertiajs/inertia-laravel/issues/21
[4] https://laravel.com/docs/11.x/authentication
[5] https://stackoverflow.com/questions/66080777/laravel-inertia-js-and-vue-check-if-user-is-logged-in