angular-docs-cn/aio/tools/transforms/templates/api/lib/descendants.html

{% macro renderDescendantList(descendants, descendantType, recursed, docTypeMatcher) %}
{% if descendants.length %}
<ul>
  {% for descendant in descendants %}
    <li>
      <code>{$ descendant.name $}</code>
      {$ renderDescendantList(descendant.descendants | filterByPropertyValue('docType', docTypeMatcher), docType, recursed, docTypeMatcher) $}
    </li>
  {% endfor %}
</ul>
{% endif %}
{% endmacro -%}

{%- macro renderDescendants(doc, descendantType, title='', recursed=true, docTypeMatcher=descendantType) %}
  {% set descendants = doc.descendants | filterByPropertyValue('docType', docTypeMatcher) %}
  {% if descendants.length %}
  <div class="descendants {$ descendantType $}">
    {% if title %}<h2>{$ title $}</h2>{% endif %}
    {$ renderDescendantList(descendants, descendantType, recursed, docTypeMatcher) $}
  </div>
  {% endif %}
{% endmacro %}