<%- unless klass.sections.length == 1 then %> <div id=“sections-section” class=“nav-section”>

<details class="nav-section-collapsible" open>
  <summary class="nav-section-header">
    <span class="nav-section-icon">
      <svg><use href="#icon-list"></use></svg>
    </span>
    <span class="nav-section-title">Sections</span>
    <span class="nav-section-chevron">
      <svg><use href="#icon-chevron"></use></svg>
    </span>
  </summary>

  <ul class="nav-list" role="directory">
    <%- klass.sort_sections.each do |section| %>
      <li><a href="#<%= section.aref %>"><%= h section.title %></a></li>
    <%- end %>
  </ul>
</details>

</div> <%- end %>