`<x-slot>` inside `@if` is always rendered when Blaze is enabled

[bernig]

Describe the bug
When Blaze is enabled, a slot declared inside an @if statement is rendered even when the condition evaluates to false.
The condition appears to be ignored and the slot content is always displayed.

Component causing the issue
Component (authentication-card.blade.php, simplified):

@blaze
<div>
    @isset($header)
        {{ $header }}
    @endisset

    {{ $slot }}
</div>

Usage:

<x-guest-layout>
    <x-authentication-card>
        @if (session('teamInvitation'))
            <x-slot name="header">
                [SOME CONTENT]
            </x-slot>
        @endif

        [...]
    </x-authentication-card>
</x-guest-layout>

The header slot should only be rendered when the @if condition evaluates to true.

Expected behavior
The slot should be displayed conditionally when wrapped in an @if statement.

Actual behavior
The slot is always displayed, regardless of the @if statement.

Notes:

• Disabling Blaze restores the expected behavior.
• Moving the @if statement inside <x-slot name="header"> fixes the issue:

<x-slot name="header">
    @if (session('teamInvitation'))
        [SOME CONTENT]
    @endif
</x-slot>

but I have not found any explanation or justification why my original version shouldn't work.

• The issue does not appear to be related to the specific condition. For example, the same behavior occurs with @if (random_int(1, 1000) === 777)

Environment

• Laravel version: 12.53.0
• PHP version: 8.3
• Blaze version: 1.0.4

[ganyicz]

Hi @bernig,

Thanks for reporting.

For now, conditional slots are not supported.

This is a limitation of the current implementation of the parser.

Enabling this syntax requires a significant overhaul but I hope to address this soon.