0 is out of stock and nothing is available from now on

assets/views/shop/_cart_body.html

@@ -37,7 +37,7 @@
             hx-post="/cart/update" hx-trigger="cartchange" hx-target="#cart-body" hx-swap="innerHTML">
   {{ ui::csrf_field() }}
             <input type="hidden" name="variant_id" value="{{ item.id }}">
-            <input type="number" name="quantity" min="0" max="{{ item.stock }}" value="{{ item.quantity }}"
+            <input type="number" name="quantity" min="0" {% if item.stock %}max="{{ item.stock }}"{% endif %} value="{{ item.quantity }}"
               @change="
                 if (parseInt($el.value || '0') <= 0 && !window.confirm('{{ t(key='cart-remove-confirm', lang=lang | default(value='sk')) }}')) {
                   $el.value = '{{ item.quantity }}';