static/frontend/unit/main/_outline.tmpl

<!--
  Copyright 2020 The Go Authors. All rights reserved.
  Use of this source code is governed by a BSD-style
  license that can be found in the LICENSE file.
-->

{{define "unit-outline"}}
  <div class="UnitOutline-jumpTo">
    <button class="UnitOutline-jumpToInput js-jumpToInput"
        aria-controls="jump-to-modal"
        aria-label="Open Jump to Identifier"
        data-test-id="jump-to-button" data-gtmc="outline button">
      Jump to ...
    </button>
  </div>
  <ul class="go-Tree js-tree" role="tree" aria-label="Outline">
    {{if .Readme.String}}
      <li class="js-readmeOutline">
        <a href="#section-readme" data-gtmc="outline link">
          README
        </a>
        {{template "readme-outline" .ReadmeOutline}}
      </li>
    {{end}}
    {{if .IsPackage}}
      <li>
        <a href="#section-documentation" data-gtmc="outline link">
          Documentation
        </a>
        {{.DocOutline}}
      </li>
    {{end}}
    {{if .SourceFiles}}
      <li>
        <a href="#section-sourcefiles" data-gtmc="outline link">
          Source Files
        </a>
      </li>
    {{end}}
    {{if .Directories}}
      <li>
        <a href="#section-directories" data-gtmc="outline link">
          Directories
        </a>
      </li>
    {{end}}
  </ul>
{{end}}

{{define "readme-outline"}}
  <ul id="readme-outline">
    {{range .}}
      <li>
        <a href="#{{.ID}}" data-gtmc="readme outline link">
          {{.Text}}
        </a>
        {{if .Children}}
          <ul>
            {{range .Children}}
              <li>
                <a href="#{{.ID}}" data-gtmc="readme outline link">
                  {{.Text}}
                </a>
                {{if .Children}}
                  <ul>
                    {{range .Children}}
                      <li>
                        <a href="#{{.ID}}" data-gtmc="readme outline link">
                          {{.Text}}
                        </a>
                      </li>
                    {{end}} {{/* range .Children */}}
                  </ul>
                {{end}} {{/* if .Children */}}
              </li>
            {{end}} {{/* range .Children */}}
          </ul>
        {{end}} {{/* if .Children */}}
      </li>
    {{end}} {{/* range . */}}
  </ul>
{{end}}

{{define "unit-outline_mobile"}}
  <label class="go-Label" aria-label="Menu">
    <select class="go-Select js-selectNav">
      <option disabled="" label="Outline"></option>
      {{if .Readme.String}}
        <optgroup label="README">
          {{range .ReadmeOutline}}<option value="{{.ID}}">{{.Text}}</option>{{end}}
        </optgroup>
      {{end}}
      {{.MobileOutline}}
      {{if .SourceFiles}}
        <option value="section-sourcefiles">Source Files</option>
      {{end}}
      {{if .Directories}}
        <option value="section-directories">Directories</option>
      {{end}}
    </select>
  </label>
{{end}}