Embrace the Larabel backend (with Livewire)

Component.php

<?php

namespace Support\Livewire;

use FilippoToso\Domain\Livewire\Component as BaseComponent;
use Illuminate\Support\Facades\View;

class Component extends BaseComponent
{
    public function __construct()
    {
        if ($errors = View::shared('errors')) {
            $this->setErrorBag($errors->getBag('default'));
        }
    }
}

helpers.php

<?php

function previous(string $key, mixed $default = null): mixed
{
    $request = request();
    $session = session();

    if ($session->hasOldInput($key)) {
        return $session->getOldInput($key);
    }

    if ($request->has($key)) {
        return $request->input($key);
    }

    return $default;
}

PostEditor.php

<?php

namespace App\Backend\Posts\Livewire;

use Support\Livewire\Component;
use Support\Models\Post;

class PostEditor extends Component
{
    public $title;

    public $content;

    /**
     * @param User $utente
     * @return void
     */
    public function mount(Post $post)
    {
        $this->title = previous('title', $post->title);
        $this->description = previous('title', $post->description);
    }

    /**
     * Get the view / contents that represent the component.
     * @return View|Closure|string
     */
    public function render()
    {
        return view('backend.posts.post-editor');
    }
}