Level 1
Yes, you can set a cookie when returning an Inertia.js response. Inertia responses are still just normal HTTP responses from your backend framework, so you set cookies the same way you normally would. Inertia does not provide its own cookie API.
use Inertia\Inertia;
use Illuminate\Support\Facades\Cookie;
public function index()
{
Cookie::queue('my_cookie', 'some value', 60); // 60 minutes
return Inertia::render('Dashboard', [
'example' => 'data',
]);
}