Awesome

mdbook-toc

A preprocessor for mdbook to add inline Table of Contents support.

It turns this marker:

<!-- toc -->

into a Table of Contents based on headings of the chapter following the marker.

If you want to use only this preprocessor, install the tool:

cargo install mdbook-toc

Add it as a preprocessor to your book.toml:

[preprocessor.toc]
command = "mdbook-toc"
renderer = ["html"]

Finally, build your book as normal:

mdbook path/to/book

The default marker is:

<!-- toc -->

If you wish to use a different marker, such as the GitLab marker [[_TOC_]], you must add the following settings to your book.toml.

[preprocessor.toc]
marker = "[[_TOC_]]"

You can also use multi-line markers such as the GitHub marker, which is:

* auto-gen TOC;
{:toc}

Configure the string with a newline:

[preprocessor.toc]
marker = "* auto-gen TOC;\n{:toc}"

or with multi-line strings:

[preprocessor.toc]
marker = """* auto-gen TOC;
{:toc}"""

By default the ToC will include headings up to level 4 (####). This can be configured in your book.toml as follows:

[preprocessor.toc]
max-level = 4