hugo-theme-relearn/layouts/partials/menu.html

<nav id="sidebar" class="{{if $.Site.Params.showVisitedLinks }}showVisitedLinks{{end}}">

{{ $currentNode := . }}
{{ $showvisitedlinks := .Site.Params.showVisitedLinks }}
  <div id="header-wrapper">
    <div id="header">
      {{ partial "logo.html" . }}
    </div>
    {{if not .Site.Params.disableSearch}}
        {{ partial "search.html" . }}
    {{end}}
  </div>

    <div class="highlightable">
    <ul class="topics">

        {{if eq .Site.Params.ordersectionsby "title"}}  
          {{range .Site.Home.Sections.ByTitle}}
          {{ template "section-tree-nav" dict "sect" . "currentnode" $currentNode "showvisitedlinks" $showvisitedlinks}}
          {{end}}
        {{else}}
          {{range .Site.Home.Sections.ByWeight}}
          {{ template "section-tree-nav" dict "sect" . "currentnode" $currentNode "showvisitedlinks" $showvisitedlinks}}
          {{end}}
        {{end}} 
    </ul>
    <hr/>
    {{ if $showvisitedlinks}}
        <a class="padding" href="#" data-clear-history-toggle=""><i class="fa fa-fw fa-history"></i> {{T "Clear-History"}}</a>
    {{ end }}
    
    <section id="footer">
      {{ partial "menu-footer.html" . }}
    </section>
  </div>
</nav>

<!-- templates -->
{{ define "section-tree-nav" }}
{{ $showvisitedlinks := .showvisitedlinks }}
{{ $currentNode := .currentnode }}
 {{with .sect}}
  {{if .IsSection}}
    {{safeHTML .Params.head}}
    <li data-nav-id="{{.URL}}" title="{{.Title}}" class="dd-item 
        {{if .IsAncestor $currentNode }}parent{{end}}
        {{if eq .UniqueID $currentNode.UniqueID}}active{{end}}
        {{if .Params.alwaysopen}}parent{{end}}
        ">
      <a href="{{ .RelPermalink}}">
        <span>
            {{safeHTML .Params.Pre}}{{.Title}}{{safeHTML .Params.Post}}
            {{ if $showvisitedlinks}}
              <i class="fa fa-check read-icon"></i>
            {{ end }}
        </span>
      </a>
      {{ $numberOfPages := (add (len .Pages) (len .Sections)) }}
      {{ if ne $numberOfPages 0 }}
        <ul>
          {{ .Scratch.Set "pages" .Pages }}
          {{ if .Sections}}
            {{ .Scratch.Set "pages" (.Pages | union .Sections) }}
          {{end}}
          {{ $pages := (.Scratch.Get "pages") }}
          
        {{if eq .Site.Params.ordersectionsby "title"}}  
          {{ range $pages.ByTitle }}
            {{ if and .Params.hidden (not $.showhidden) }} 
            {{else}}
            {{ template "section-tree-nav" dict "sect" . "currentnode" $currentNode "showvisitedlinks" $showvisitedlinks }}
            {{end}}
          {{ end }}
        {{else}}
          {{ range $pages.ByWeight }}
            {{ if and .Params.hidden (not $.showhidden) }} 
            {{else}}
            {{ template "section-tree-nav" dict "sect" . "currentnode" $currentNode "showvisitedlinks" $showvisitedlinks }}
            {{end}}
          {{ end }}
        {{end}}
        </ul>
      {{ end }}        
    </li>
  {{else}}
    {{ if not .Params.Hidden }}
      <li data-nav-id="{{.URL}}" title="{{.Title}}" class="dd-item {{if eq .UniqueID $currentNode.UniqueID}}active{{end}}">
        <a href="{{ .RelPermalink}}">
        <span>{{safeHTML .Params.Pre}}{{.Title}}{{safeHTML .Params.Post}}
        {{ if $showvisitedlinks}}<i class="fa fa-check read-icon"></i>{{end}}
        </span> 
        </a>
    </li>
     {{ end }}
  {{end}}
 {{ end }}
{{ end }}