hextra/layouts/partials/sidebar.html

<aside class="sidebar-container flex flex-col print:hidden md:top-16 md:shrink-0 md:w-64 md:sticky md:self-start max-md:[transform:translate3d(0,-100%,0)]">
  <!-- Search bar on small screen -->
  <div class="px-4 pt-4 md:hidden">
    {{ partial "search.html" }}
  </div>
  <div class="overflow-y-auto overflow-x-hidden p-4 grow md:h-[calc(100vh-var(--navbar-height)-var(--menu-height))]">
    <ul class="flex flex-col gap-1 md:hidden">
      <!-- Navbar -->
      {{- range .Site.Menus.main -}}
        {{- if and .URL (ne .Params.type "search") -}}
          <li>{{ template "sidebar-item-link" dict "active" false "title" .Name "link" .URL }}</li>
        {{- end -}}
      {{- end -}}
      <div class="mt-4 border-t py-4 dark:border-neutral-800 contrast-more:border-neutral-400 dark:contrast-more:border-neutral-400" />

      {{- $s := .FirstSection -}}
      {{- $topLevelItems := union $s.RegularPages $s.Sections -}}
      {{- $pageURL := .RelPermalink -}}

      {{- range $topLevelItems.ByWeight -}}
        {{ template "sidebar-item" (dict "item" . "pageURL" $pageURL) }}
        {{ template "sidebar-tree" (dict "context" . "level" 1 "pageURL" $pageURL "toc" true) }}
      {{ end }}


      <!-- Sidebar footer -->
      <div class="mt-4 border-t py-4 dark:border-neutral-800 contrast-more:border-neutral-400 dark:contrast-more:border-neutral-400" />
      {{ template "sidebar-footer" }}
    </ul>

    <!-- Sidebar on large screen -->
    <ul class="flex flex-col gap-1 max-md:hidden">
      {{- $s := .FirstSection -}}
      {{- $topLevelItems := union $s.RegularPages $s.Sections -}}
      {{- $pageURL := .RelPermalink -}}

      {{- range $topLevelItems.ByWeight -}}
        <!-- First level items and nested tree under  -->
        {{ template "sidebar-item" (dict "item" . "pageURL" $pageURL) }}
        {{ template "sidebar-tree" (dict "context" . "level" 1 "pageURL" $pageURL) }}
      {{ end }}
      <!-- Sidebar footer -->
      {{ template "sidebar-footer" }}
    </ul>
  </div>
  {{ template "theme-switch" }}
</aside>

{{- define "sidebar-footer" -}}
  {{- range site.Menus.sidebar -}}
    {{ if eq .Params.type "separator" }}
      <li class="[word-break:break-word] mt-5 mb-2 px-2 py-1.5 text-sm font-semibold text-gray-900 first:mt-0 dark:text-gray-100">
        <span class="cursor-default">{{ .Name }}</span>
      </li>
    {{ else }}
      <li>{{ template "sidebar-item-link" dict "active" false "title" .Name "link" .URL }}</li>
    {{ end }}
  {{- end -}}
{{- end -}}

{{- define "sidebar-tree" -}}
  {{ $pageURL := .pageURL }}
  {{ $level := .level }}
  {{ $toc := .toc | default false }}

  {{ if ge $level 4 }}
    {{ return }}
  {{ end }}

  {{ $items := union .context.RegularPages .context.Sections }}
  {{ with $items }}
    <div class="pt-1 ltr:pr-0">
      <ul class='relative flex flex-col gap-1 before:absolute before:inset-y-1 before:w-px before:bg-gray-200 before:content-[""] ltr:ml-3 ltr:pl-3 ltr:before:left-0 rtl:mr-3 rtl:pr-3 rtl:before:right-0 dark:before:bg-neutral-800'>
        {{ range $items.ByWeight }}
          {{ $active := eq $pageURL .RelPermalink }}
          {{ $title := .LinkTitle | default .File.BaseFileName }}
          <li class="flex flex-col gap-1">
            {{ template "sidebar-item-link" dict "active" $active "title" $title "link" .RelPermalink }}
            {{ if and $toc $active }}
              {{ template "sidebar-toc" dict "page" . }}
            {{ end }}
          </li>
          {{ template "sidebar-tree" dict "context" . "pageURL" $pageURL "level" (add $level 1) }}
        {{ end }}
      </ul>
    </div>
  {{ end }}
{{- end -}}

{{- define "sidebar-toc" -}}
  {{ $page := .page }}
  {{ with $page.Fragments.Headings }}
    <ul class='flex flex-col gap-1 relative before:absolute before:inset-y-1 before:w-px before:bg-gray-200 before:content-[""] dark:before:bg-neutral-800 ltr:pl-3 ltr:before:left-0 rtl:pr-3 rtl:before:right-0 ltr:ml-3 rtl:mr-3'>
      {{ range . }}
        {{ with .Headings }}
          {{ range . }}
            <li>
              <a
                href="#{{ anchorize .ID }}"
                class="flex rounded px-2 py-1.5 text-sm transition-colors [word-break:break-word] cursor-pointer [-webkit-tap-highlight-color:transparent] [-webkit-touch-callout:none] contrast-more:border flex gap-2 before:opacity-25 before:content-['#'] text-gray-500 hover:bg-gray-100 hover:text-gray-900 dark:text-neutral-400 dark:hover:bg-primary-100/5 dark:hover:text-gray-50 contrast-more:text-gray-900 contrast-more:dark:text-gray-50 contrast-more:border-transparent contrast-more:hover:border-gray-900 contrast-more:dark:hover:border-gray-50"
              >
                {{- .Title -}}
              </a>
            </li>
          {{ end }}
        {{ end }}
      {{ end }}
    </ul>
  {{ end }}
{{- end -}}

{{- define "sidebar-item" }}
  {{- $active := eq .pageURL .item.RelPermalink -}}
  {{- $title := .item.LinkTitle | default .item.File.BaseFileName -}}
  {{- $link := .item.RelPermalink -}}


  <li class="open">
    {{ template "sidebar-item-link" dict "active" $active "title" $title "link" $link }}
  </li>
{{- end -}}

{{- define "sidebar-item-link" -}}
  {{ $external := strings.HasPrefix .link "http" }}
  <a
    class="flex cursor-pointer rounded px-2 py-1.5 text-sm transition-colors [-webkit-tap-highlight-color:transparent] [-webkit-touch-callout:none] [word-break:break-word]
    {{- if .active }}
      bg-primary-100 font-semibold text-primary-800 contrast-more:border contrast-more:border-primary-500 dark:bg-primary-400/10 dark:text-primary-600 contrast-more:dark:border-primary-500
    {{- else }}
      text-gray-500 hover:bg-gray-100 hover:text-gray-900 contrast-more:border contrast-more:border-transparent contrast-more:text-gray-900 contrast-more:hover:border-gray-900 dark:text-neutral-400 dark:hover:bg-primary-100/5 dark:hover:text-gray-50 contrast-more:dark:text-gray-50 contrast-more:dark:hover:border-gray-50
    {{- end -}}"
    href="{{ .link }}"
    {{ if $external }}target="_blank" rel="noreferer"{{ end }}
  >
    {{- .title -}}
  </a>
{{- end -}}

{{- define "theme-switch" -}}
  <!-- theme switch button -->
  <div class="sticky bottom-0 bg-white dark:bg-dark mx-4 py-4 shadow-[0_-12px_16px_#fff] flex items-center gap-2 dark:border-neutral-800 dark:shadow-[0_-12px_16px_#111] contrast-more:border-neutral-400 contrast-more:shadow-none contrast-more:dark:shadow-none border-t" data-toggle-animation="show">
    <div class="grow flex flex-col">
      <button title="Change theme" class="h-7 rounded-md px-2 text-left text-xs font-medium text-gray-600 transition-colors dark:text-gray-400 hover:bg-gray-100 hover:text-gray-900 dark:hover:bg-primary-100/5 dark:hover:text-gray-50" id="theme-toggle" type="button" aria-label="Toggle Dark Mode">
        <div id="theme-toggle-light-icon" class="hidden flex items-center gap-2 capitalize">
          {{- partial "utils/icon.html" (dict "name" "sun" "attributes" "height=12") -}}
          <span>Light</span>
        </div>
        <div id="theme-toggle-dark-icon" class="hidden flex items-center gap-2 capitalize">
          {{- partial "utils/icon.html" (dict "name" "moon" "attributes" "height=12") -}}
          <span>Dark</span>
        </div>
      </button>
    </div>
  </div>
{{- end -}}