Add all files

app/Livewire/Components/Cart.php

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+<?php
+
+namespace App\Livewire\Components;
+
+use App\Classes\Cart as ClassesCart;
+use App\Livewire\Component;
+use Livewire\Attributes\On;
+
+class Cart extends Component
+{
+    public $cartCount;
+
+    public function mount()
+    {
+        $this->cartCount = ClassesCart::get()->count();
+        if (ClassesCart::get()->isEmpty()) {
+            $this->skipRender();
+        }
+    }
+
+    #[On('cartUpdated')]
+    public function onCartUpdated()
+    {
+        $this->cartCount = ClassesCart::get()->count();
+    }
+
+    public function render()
+    {
+        return view('components.cart');
+    }
+}