resources/views/bootstrap4.blade.php
<?php /** @var \Glhd\Gretel\View\BreadcrumbCollection|\Glhd\Gretel\View\Breadcrumb[] $breadcrumbs */ ?>
@unless ($breadcrumbs->isEmpty())
<nav aria-label="Breadcrumbs">
<ol class="breadcrumb">
@foreach ($breadcrumbs as $breadcrumb)
<li class="breadcrumb-item {{ $activeClass('active') }}" {{ $ariaCurrent() }}>
@if($breadcrumb->is_current_page)
{{ $breadcrumb->title }}
@else
<a href="{{ $breadcrumb->url }}">
{{ $breadcrumb->title }}
</a>
@endif
@endforeach
</ol>
</nav>
@endunless