<div class=“book-summary” id=“bookSummary”>
<nav role="navigation"> <ul class="summary"> <li class="chapter {% if page.book.index.url == page.url -%}active{% endif -%}"> <a href="{{ page.book.url | relative_url }}" class="custom-link">{{ page.book.title }}</a> </li> <li class="divider"></li> {%- for part in page.book.parts -%} <li class="chapter {% if part.url == page.url -%}active{% endif -%}"> {%- if part.url -%} <a href="{{ part.url | relative_url }}">{{ part.title }}</a> {%- else -%} <span>{{ part.title }}</span> {%- endif -%} {%- if part.parts.size > 0 -%} <ul class="articles"> {%- for part in part.parts -%} <li class="chapter {% if part.url == page.url -%}active{% endif -%}"> <a href="{{ part.url | relative_url }}">{{ part.title }}</a> </li> {%- endfor -%} </ul> {%- endif -%} </li> {%- endfor -%} </ul> </nav>
</div>