• Installation
• Usage
  • 1. Basic Usage
  • 2. Advanced Usage
• Generated HTML
• Default Configuration
• Customization
  • TOC levels
  • Skip TOC
  • Skip TOC Section
  • CSS Styling
  • Custom CSS Class

Add jekyll-toc plugin in your site's Gemfile, and run bundle install.

gem 'jekyll-toc'

Add jekyll-toc to the gems: section in your site's _config.yml.

plugins:
  - jekyll-toc

Set toc: true in posts for which you want the TOC to appear.

---
layout: post
title: "Welcome to Jekyll!"
toc: true
---

There are three Liquid filters, which can be applied to HTML content, e.g. the Liquid variable content available in Jekyll's templates.

Add the toc filter to your site's {{ content }} (e.g. _layouts/post.html).

{{ content | toc }}

This filter places the TOC directly above the content.

If you'd like separated TOC and content, you can use toc_only and inject_anchors filters.

⚠️ Please use {% toc %} instead of {{ content | toc_only }}.

Generates the TOC itself as described below. Mostly useful in cases where the TOC should not be placed immediately above the content but at some other place of the page, i.e. an aside.

<div>
  <div id="table-of-contents">
    {% toc %}
  </div>
  <div id="markdown-content">
    {{ content }}
  </div>
</div>

{% toc %} can be available only in Jekyll Posts and Jekyll Collections. If any concern or issue, please report it on issue.

Injects HTML anchors into the content without actually outputting the TOC itself. They are of the form:

<a class="anchor" href="#heading1-1" aria-hidden="true">
  <span class="octicon octicon-link"></span>
</a>

This is only useful when the TOC itself should be placed at some other location with the toc_only filter.

jekyll-toc generates an unordered list. The HTML output is as follows.

<ul class="section-nav">
  <li class="toc-entry toc-h1"><a href="#heading1">Heading.1</a>
    <ul>
      <li class="toc-entry toc-h2"><a href="#heading1-1">Heading.1-1</a></li>
      <li class="toc-entry toc-h2"><a href="#heading1-2">Heading.1-2</a></li>
    </ul>
  </li>
  <li class="toc-entry toc-h1"><a href="#heading2">Heading.2</a>
    <ul>
      <li class="toc-entry toc-h2"><a href="#heading2-1">Heading.2-1</a>
        <ul>
          <li class="toc-entry toc-h3"><a href="#heading2-1-1">Heading.2-1-1</a></li>
          <li class="toc-entry toc-h3"><a href="#heading2-1-2">Heading.2-1-2</a></li>
        </ul>
      </li>
      <li class="toc-entry toc-h2"><a href="#heading2-2">Heading.2-2</a></li>
    </ul>
  </li>
</ul>

toc:
  min_level: 1
  max_level: 6
  no_toc_section_class: no_toc_section
  list_class: section-nav
  sublist_class: ''
  item_class: toc-entry
  item_prefix: toc-

The toc levels can be configured on _config.yml:

toc:
  min_level: 2 # default: 1
  max_level: 5 # default: 6

The default level range is <h1> to <h6>.

The heading is ignored in the toc when you add no_toc to the class.

<h1>h1</h1>
<h1 class="no_toc">This heading is ignored in the toc</h1>
<h2>h2</h2>

The headings are ignored inside the element which has no_toc_section class.

<h1>h1</h1>
<div class="no_toc_section">
  <h2>This heading is ignored in the toc</h2>
  <h3>This heading is ignored in the toc</h3>
</div>
<h4>h4</h4>

Which would result in only the <h1> & <h4> within the example being included in the TOC.

The class can be configured on _config.yml:

toc:
  no_toc_section_class: exclude # default: no_toc_section

Configuring multiple classes for no_toc_section_class is allowed:

toc:
  no_toc_section_class:
    - no_toc_section
    - exclude
    - your_custom_skip_class_name

The toc can be modified with CSS. The sample CSS is the following.

.section-nav {
  background-color: #fff;
  margin: 5px 0;
  padding: 10px 30px;
  border: 1px solid #e8e8e8;
  border-radius: 3px;
}

Each TOC li entry has two CSS classes for further styling. The general toc-entry is applied to all li elements in the ul.section-nav.

Depending on the heading level each specific entry refers to, it has a second CSS class toc-XX, where XX is the HTML heading tag name. For example, the TOC entry linking to a heading <h1>...</h1> (a single # in Markdown) will get the CSS class toc-h1.

You can apply custom CSS classes to the generated <ul> and <li> tags.

toc:
  # Default is "section-nav":
  list_class: my-list-class
  # Default is no class for sublists:
  sublist_class: my-sublist-class
  # Default is "toc-entry":
  item_class: my-item-class
  # Default is "toc-":
  item_prefix: item-