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This GitBook plugin adds an inline table of contents (TOC) to each page based on configurable selectors. Inline TOC can be enabled or disabled by default or on individual pages. TOC is placed on the right side and moves to top for smaller devices automatically.

Inline TOC stays at the top of the page when scrolling using a sticky effect. Current position is highlighted by a scrollspy effect.

Inline TOC in desktop and mobile mode

Plugin uses gumshoe and anchorjs to implement functionality.

1. In you gitbook's book.json file, add intopic-toc to plugins list.
2. In pluginsConfig, configure the plugin so it does fit your needs. A custom setup is not mandatory.

Sample book.json file for gitbook version 2.0.0+

{
 "plugins": [
 "intopic-toc"
 ]
}

Sample book.json file for gitbook version 2.0.0+ and custom heading

{
 "plugins": [
 "intopic-toc"
 ],
 "pluginsConfig": {
 "intopic-toc": {
 "label": "In this article"
 }
 }
}

Sample book.json file for gitbook version 2.0.0+ and multilingual headings

{
 "plugins": [
 "intopic-toc"
 ],
 "pluginsConfig": {
 "intopic-toc": {
 "label": {
 "de": "In diesem Artikel",
 "en": "In this article"
 }
 }
 }
}

Note: Above snippets can be used as complete book.json file, if one of these matches your requirements and your book doesn't have one yet.

1. Run gitbook install. It will automatically install intopic-toc gitbook plugin for your book. This is needed only once.
2. Build your book (gitbook build) or serve (gitbook serve) as usual.

For basic usage, the only thing you have to do is install the plugin. For advanced scenarios see following configuration sample.

{
 "plugins": [
 "intopic-toc"
 ],
 "pluginsConfig": {
 "intopic-toc": {
 "selector": ".markdown-section h1, .markdown-section h2, .markdown-section h3, .markdown-section h4, .markdown-section h5, .markdown-section h6",
 "mode": "nested",
 "maxDepth": 2,
 "isCollapsed": false,
 "isScrollspyActive": true,
 "visible": true,
 "label": {
 "de": "In diesem Artikel",
 "en": "In this article"
 },
 }
 }
}

If visible parameter set to true and you want to hide the TOC on a single page, add the front matter item isTocVisible: false to the top of the Markdown file like this:

---
isTocVisible: false
---
# My awesome documentation
Lorem ipsum dolor sit amet, consetetur sadipscing elitr, ...

The specific front matter isTocVisible overrides the visible parameter from global configuration.

Heading are identified using selector property of the plugin. Usually there is no need to adjust the default value. For customizations see following sections.

By default, the plugin chooses the top-level navigation items by searching for headings at the first identified heading level using selector property value, then works its way down (<h1/>, then <h2/>, etc.) It will stop when it finds the first set of headings where more than one exists at that level. For example (assuming we do not have modified the selector property):

<h1>Title</h1>
...
<h2>1 Section 1</h2>
<h3>1.1 Subsection</h3>
...
<h4>1.1.1 Subsection</h4>
...
<h3>1.2 Subsection</h3>
...
<h2>2 Section 2</h2>
<h3>2.1 Subsection</h3>
...

The plugin would see there’s only one <h1>, then that <h2> appears two times. Then it stops and identified level becomes the top-level navigation items in the table of contents. Following headings under those (the <h3>s and <h4>s in this case) would be the next levels in the navigation.

Described mechanism applies to all flat and nested mode. Rendering depth could be limited by specifying maxDepth property value.

Resulting table of contents using mode = flat and maxDepth = 2 would look like:

1 Section 1
1.1 Subsection
1.2 Subsection
2 Section 2
2.1 Subsection

Resulting table of contents using mode = nested and maxDepth = 2 would look like:

1 Section 1
 1.1 Subsection
 1.2 Subsection
2 Section 2
 2.1 Subsection

If inline TOC does not look as expected, check if your book.json is valid according to this documentation.

08/20/2022

• Updated development dependencies and moved to GitHub Actions
• Updated anchorjs dependency to version 4.3.1

05/03/2020

• Added support for different layout modes along with improved scrollspy experience

01/07/2019

• Used gumshoe scrollspy script for a better experience

01/05/2019

• Initial Release