livewire nested component doesn't disappear in foreach

The issue you're experiencing is related to how Livewire handles nested components and reactivity. When you reset the $foods property, the expectation is that the UI should update to reflect the empty state. However, nested Livewire components can sometimes interfere with this reactivity due to how they manage their own lifecycle and state.

Here's a solution to address this issue:

1. Ensure Unique Keys: Make sure that each Livewire component has a truly unique key. This helps Livewire manage the component's lifecycle correctly. In your case, you are using $loop->index, which might not be unique if the list is modified. Instead, use a unique identifier from the $food item itself, such as an ID.

2. Use wire:key Properly: Ensure that the wire:key attribute is set correctly for both the parent div and the nested Livewire component. This helps Livewire track changes more accurately.

3. Check Component State: Ensure that the nested component does not maintain its own state that might conflict with the parent component's state.

Here's an updated version of your code with these considerations:

@foreach($this->foods as $food)
    <div
        class="grid grid-cols-[3fr_1fr_1fr_1fr] gap-2 mb-2"
        wire:key="food-{{ $food['id'] ?? $loop->index }}"
        x-on:food-chosen="handleFoodChosen($event, {{ $loop->index }})"
    >
        <livewire:components.food-search
            :key="'food-search-' . ($food['id'] ?? $loop->index)"
        />
        <input
            type='number'
            placeholder='0 г'
            class='input input-bordered w-full'
            wire:model.number="foods.{{ $loop->index }}.weight"
            @keyup="handleChangeFood({{ $loop->index }})"
        />
        <input
            type='number'
            class='input input-bordered w-full'
            wire:model.number="foods.{{ $loop->index }}.calories_per_100"
            @keyup="handleChangeFood({{ $loop->index }})"
        />
        <input
            type='number'
            class='input input-bordered w-full'
            wire:model.number="foods.{{ $loop->index }}.calories"
            disabled
        />
    </div>
    <x-input-error :messages="$errors->get('foods.' . $loop->index . '.name')"/>
    <x-input-error :messages="$errors->get('foods.' . $loop->index . '.weight')"/>
    <x-input-error :messages="$errors->get('foods.' . $loop->index . '.calories_per_100')"/>
@endforeach

Additional Tips:

• Debugging: Use @dd($this->foods) in your Livewire component to ensure that the $foods array is indeed empty after calling $this->reset().
• Component Lifecycle: If the nested component has its own lifecycle methods (like mount or updated), ensure they are not interfering with the parent component's state.
• Livewire Version: Make sure you are using the latest version of Livewire, as updates often include bug fixes and improvements related to reactivity.

By ensuring unique keys and checking the component's state management, you should be able to resolve the issue with the nested components not disappearing as expected.