Initial case statement for various template types for accessible breadcrumbs - https://www.shopify.com/partners/blog/breadcrumb-navigation

accessible-breadcrumbs-case-statement.liquid

{% assign t = template | split: '.' | first  %}

<nav class="breadcrumbs" aria-label="breadcrumbs">
  <ol>
    <li>
      <a href="/" title="Home">Home</a>
    </li>

  {% case t %}
  {% when 'page' %}

    {% comment %} breadcrumb link output {% endcomment %}

  {% else %}

    <li aria-current="page">
      <a href="{{ request.path }}" aria-current="page">{{ page_title }}</a>
    </li>

  {% endcase %}

  </ol>
</nav>