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

    {{- $showvisitedlinks := .Site.Params.showVisitedLinks }}
    <aside id="R-sidebar" class="default-animation{{ if $showvisitedlinks }} showVisitedLinks{{ end }}">
      {{- $currentNode := . }}
      <div id="R-header-topbar" class="default-animation"></div>
      <div id="R-header-wrapper" class="default-animation">
        <div id="R-header" class="default-animation">
{{ partial "logo.html" . }}
        </div>
{{ partial "search.html" . }}
      </div>
      <div id="R-homelinks" class="default-animation{{ if not .Site.Params.disableLandingPageButton }} homelinks{{ end }}">
      {{- if not .Site.Params.disableLandingPageButton }}
        {{- if (ne .Site.Params.landingPageURL nil) }}
          {{- warnf "%q: UNSUPPORTED usage of 'landingPageURL' config parameter found, remove it and optionally overwrite the `logo.html` partial to provide a link if it should not point to the project's home page; see https://mcshelby.github.io/hugo-theme-relearn/basics/migration#420" .File.Filename }}
        {{- end }}
        <ul>
          <li><a class="padding" href="{{ partial "permalink.gotmpl" (dict "to" .Site.Home) }}">{{ .Site.Params.landingPageName | default `<i class="fa-fw fas fa-home"></i> Home` | safeHTML }}</a></li>
        </ul>
      {{- end }}
        <hr class="padding">
      </div>
      <div id="R-content-wrapper" class="highlightable">
        <div id="R-topics">
          <ul class="enlarge morespace collapsible-menu">
            {{- $pages := partialCached "_relearn/pages.gotmpl" (dict "page" .Site.Home) .Site.Home.Path }}
            {{- $defaultAlwaysopen := .Site.Params.alwaysopen | default false }}
            {{- range $pages }}
              {{- template "section-tree-nav" dict "sect" . "currentnode" $currentNode "showvisitedlinks" $showvisitedlinks "alwaysopen" $defaultAlwaysopen }}
            {{- end }}
          </ul>
        </div>
        {{- $page := . }}
        {{- $disableShortcutsTitle := .Site.Params.DisableShortcutsTitle }}
        {{- with .Site.Menus.shortcuts }}
        <div id="R-shortcuts">
          <div class="nav-title padding">{{ if not $disableShortcutsTitle }}{{ T "Shortcuts-Title" }}{{ end }}</div>
          <ul class="space">
            {{- range sort . "Weight" }}
              {{- $shortcut := . }}
              {{- with $page.Site.GetPage (printf "%s" $shortcut.URL ) }}
                {{- $to := . }}
            <li>{{ $shortcut.Pre }}<a class="padding" href="{{ partial "permalink.gotmpl" (dict "to" $to) }}">{{ safeHTML $shortcut.Name }}</a>{{ $shortcut.Post }}</li>
              {{- else }}
            <li>{{ $shortcut.Pre }}<a class="padding" href="{{ $shortcut.URL | relLangURL }}">{{ safeHTML $shortcut.Name }}</a>{{ $shortcut.Post }}</li>
              {{- end }}
            {{- end }}
          </ul>
        </div>
        {{- end }}
        {{- $siteLanguages := .Site.Languages }}
        {{- $showlangswitch := and hugo.IsMultilingual (not .Site.Params.disableLanguageSwitchingButton) (gt (int (len $siteLanguages)) 1) }}
        {{- $themevariants := partialCached "_relearn/themeVariants.gotmpl" . }}
        {{- $showvariantswitch := gt (int (len $themevariants)) 1 }}
        {{- $footer := partial "menu-footer.html" . }}
        {{- $showfooter := not (eq 0 (int (len ($footer | plainify)))) }}
        <div class="padding footermargin footerLangSwitch footerVariantSwitch footerVisitedLinks footerFooter{{if $showlangswitch}} showLangSwitch{{end}}{{if $showvariantswitch}} showVariantSwitch{{end}}{{if $showvisitedlinks}} showVisitedLinks{{end}}{{if $showfooter}} showFooter{{end}}"></div>
        <div id="R-menu-footer">
          <hr class="padding default-animation footerLangSwitch footerVariantSwitch footerVisitedLinks footerFooter{{if $showlangswitch}} showLangSwitch{{end}}{{if $showvariantswitch}} showVariantSwitch{{end}}{{if $showvisitedlinks}} showVisitedLinks{{end}}{{if $showfooter}} showFooter{{end}}">
          <div id="R-prefooter" class="footerLangSwitch footerVariantSwitch footerVisitedLinks{{if $showlangswitch}} showLangSwitch{{end}}{{if $showvariantswitch}} showVariantSwitch{{end}}{{if $showvisitedlinks}} showVisitedLinks{{end}}">
            <ul>
              <li id="R-select-language-container" class="footerLangSwitch{{if $showlangswitch}} showLangSwitch{{end}}">
                <div class="padding menu-control">
                  <i class="fa-fw fas fa-language"></i>
                  <span>&nbsp;</span>
                  <div class="control-style">
                    <label class="a11y-only" for="R-select-language">{{ T "Language" }}</label>
                    <select id="R-select-language" onchange="location = this.querySelector( this.value ).dataset.url;">
                      {{- $page := .Page }}
                      {{- $pageLang := .Page.Language.Lang }}
                      {{- range .Page.AllTranslations }}
                      <option id="R-select-language-{{ .Language.Lang }}" value="#R-select-language-{{ .Language.Lang }}" data-url="{{ partial "permalink.gotmpl" (dict "to" .) }}" lang="{{ .Language.LanguageCode }}"{{ if eq $pageLang .Language.Lang }} selected{{ end }}>{{ .Language.LanguageName }}</option>
                      {{- end }}
                    </select>
                  </div>
                  <div class="clear"></div>
                </div>
              </li>
              <li id="R-select-variant-container" class="footerVariantSwitch{{if $showvariantswitch}} showVariantSwitch{{end}}">
                <div class="padding menu-control">
                  <i class="fa-fw fas fa-paint-brush"></i>
                  <span>&nbsp;</span>
                  <div class="control-style">
                    <label class="a11y-only" for="R-select-variant">{{ T "Theme" }}</label>
                    <select id="R-select-variant" onchange="window.variants && variants.changeVariant( this.value );">
                      {{- $firstvariant := true }}
                      {{- range $themevariants }}
                        {{- $themevariant := . }}
                      <option id="R-select-variant-{{ $themevariant.identifier }}" value="{{ $themevariant.identifier }}"{{- if $firstvariant }} selected{{ end }}>{{ $themevariant.name }}</option>
                        {{- $firstvariant = false }}
                      {{- end }}
                    </select>
                  </div>
                  <div class="clear"></div>
                </div>
                <script>window.variants && variants.markSelectedVariant();</script>
              </li>
              <li class="footerVisitedLinks{{if $showvisitedlinks}} showVisitedLinks{{end}}">
                <div class="padding menu-control">
                  <i class="fa-fw fas fa-history"></i>
                  <span>&nbsp;</span>
                  <div class="control-style">
                    <button onclick="clearHistory();">{{ T "Clear-History" }}</button>
                  </div>
                  <div class="clear"></div>
                </div>
              </li>
            </ul>
          </div>
          <div id="R-footer" class="footerFooter{{if $showfooter}} showFooter{{end}}">
            {{- $footer }}
          </div>
        </div>
      </div>
    </aside>
    {{- define "section-tree-nav" }}
      {{- $currentNode := .currentnode }}
      {{- $showvisitedlinks := .showvisitedlinks }}
      {{- $alwaysopen := .alwaysopen }}
      {{- $currentFileRelPermalink := .currentnode.RelPermalink }}
      {{- with .sect }}
        {{- $isSelf := eq .RelPermalink $currentFileRelPermalink }}
        {{- $isAncestor := and (not $isSelf) (.IsAncestor $currentNode) }}
        {{- $isActive := $isSelf }}
        {{- $pages := partialCached "_relearn/pages.gotmpl" (dict "page" .) .Path }}
        {{- $relearnIsHiddenFrom := index ($currentNode.Scratch.Get "relearnIsHiddenFrom") .RelPermalink }}
        {{- $hidden := and $relearnIsHiddenFrom (not $.showhidden) (not $isSelf) (not $isAncestor) }}
        {{- if $hidden }}
        {{- else }}
          {{- $numberOfVisibleChildren := 0 }}
          {{- range $pages }}
            {{- $isSelfSub := eq .RelPermalink $currentFileRelPermalink }}
            {{- $isAncestorSub := and (not $isSelf) (.IsAncestor $currentNode) }}
            {{- $relearnIsSubHiddenFrom := index ($currentNode.Scratch.Get "relearnIsHiddenFrom") .RelPermalink }}
            {{- $subHidden := and $relearnIsSubHiddenFrom (not $.showhidden) (not $isSelfSub) (not $isAncestorSub) }}
            {{- $numberOfVisibleChildren = add $numberOfVisibleChildren (int (not $subHidden)) }}
          {{- end }}
          {{- $title := partial "title.gotmpl" (dict "page" . "linkTitle" true) }}
          {{- $url := partial "permalink.gotmpl" (dict "to" .) }}
          {{- safeHTML .Params.head }}
          {{- if $numberOfVisibleChildren }}
            {{- $isCollapsible := or (.Params.collapsibleMenu | default .Site.Params.collapsibleMenu) (not $url) }}
            {{- $currentAlwaysopen := .Params.alwaysopen | default $alwaysopen }}
            {{- $pageHash := md5 .Page }}
            {{- $isOpen := or $currentAlwaysopen $isSelf $isAncestor }}
          <li data-nav-id="{{ $url }}" class="{{if $isActive }}active {{end}}{{if (or $isSelf $isAncestor) }}parent {{end}}{{if $currentAlwaysopen}}alwaysopen{{end}}">{{ if $isCollapsible }}<input type="checkbox" id="R-section-{{ $pageHash }}" aria-controls="R-subsections-{{ $pageHash }}"{{ if $isOpen }} checked{{ end }}><label for="R-section-{{ $pageHash }}"><i class="fa-fw fas fa-chevron-down"></i><i class="fa-fw fas fa-chevron-right"></i><span class="a11y-only">{{ T "Submenu" $title }}</span></label>{{ end }}{{ if $url }}<a class="padding" href="{{ $url }}">{{ else }}<span class="padding">{{ end }}
            {{- partial "menu-pre.html" . }}{{ $title }}{{ partial "menu-post.html" . }}
            {{- if $url }}{{ if $showvisitedlinks }}<i class="fa-fw fas fa-check read-icon"></i>{{ end }}</a>{{ else }}</span>{{ end }}<ul id="R-subsections-{{ $pageHash }}" class="morespace collapsible-menu">
            {{- $defaultAlwaysopen := .Site.Params.alwaysopen | default true }}
            {{- range $pages }}
              {{- template "section-tree-nav" dict "sect" . "currentnode" $currentNode "showvisitedlinks" $showvisitedlinks "alwaysopen" $defaultAlwaysopen }}
            {{- end }}</ul></li>
          {{- else }}
          <li data-nav-id="{{ $url }}" class="{{if $isActive }}active{{end}}">{{ if $url }}<a class="padding" href="{{ $url }}">{{ else }}<span class="padding">{{ end }}
              {{- partial "menu-pre.html" . }}{{ $title }}{{ partial "menu-post.html" . }}
              {{- if $url }}{{ if $showvisitedlinks }}<i class="fa-fw fas fa-check read-icon"></i>{{ end }}</a>{{ else }}</span>{{ end }}</li>
          {{- end }}
        {{- end }}
      {{- end }}
    {{- end }}