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Description:

mkdocsenumerateheadingsplugin 0.6.2

mkdocs-enumerate-headings-plugin
MkDocs Plugin to enumerate the headings (h1-h6) across MkDocs pages.

:point_right: If you're looking to add heading numbers to your site to support exporting to single-page standalone HTML or a PDF file, have a look at mkdocs-print-site-plugin instead!

Features :star2:

Automatically number all headings and (optionally) give each page an sequential chapter number
Great for writing (technical) reports
Compatible with plugins like awesome-pages and monorepo
Compatible with markdown_extensions like pymdownx.snippets
Compatible with themes like mkdocs-material
Easy to customize styling through CSS

Setup
Install the plugin using pip:
pip3 install mkdocs-enumerate-headings-plugin

Next, add the following lines to your mkdocs.yml:
plugins:
- search
- enumerate-headings

MkDocs executes plugins in the order they are defined. If you use any other plugins that alter the navigation, make sure to define them before the enumerate-headings plugin.

If you have no plugins entry in your config file yet, you'll likely also want to add the search plugin. MkDocs enables it by default if there is no plugins entry set.

Usage
enumerate-headings will increment the chapter number for each new page (in the order they appear in the navigation) and enumerate all subheadings (unless you disable in this in the options).
There is only one requirement: make sure each markdown page starts with a level 1 header (see how to write markdown headers). Some MkDocs themes will handle this for your automatically, inserting the page title as a heading 1 if you do not specify one. If a heading 1 is still missing, you'll get a helpful error.
Pages with multiple level 1 headings are allowed and the chapter numbers will increment accordingly.

Note this plugin does not affect your markdown files, only the rendered HTML.

Styling
All heading numbers are wrapped in <span class='enumerate-headings-plugins'></span> and can be styled using CSS. See customizing a MkDocs theme on how to add an CSS to your theme.
As an example you can make the numbering lighter than the heading title by saving the CSS snippet below to a file and adding it to your MkDocs site using the extra_css setting in your mkdocs.yml file.
/* Extra CSS for mkdocs-enumerate-headings-plugin */
.enumerate-headings-plugin {
filter: opacity(35%);
}

Options
You can customize the plugin by setting options in mkdocs.yml:
plugins:
- enumerate-headings:
toc_depth: 0
strict: true
increment_across_pages: true
include:
- "*"
exclude:
- index.md
- another_page.md
restart_increment_after:
- second_section.md

toc_depth (default 0): Up to which level the table of contents should be enumerated as well. Default is 0, which means the TOC is not enumerated at all. Max is 6 (showing all enumeration)
strict (default true): Raise errors instead of warnings when first heading on a page is not a level one heading (single #) and your MkDocs theme has not inserted the page title as a heading 1 for you. Note that in strict: false mode the heading numbers might be incorrect between pages and before and after a level 1 heading.
increment_across_pages (default true): Increment the chapter number for each new page (in the order they appear in the navigation). If disabled, each page will start from 1.
include (default ["*"]): Specify a list of page source paths (one per line) that should have enumeration (included in processing by this plugin). This can be useful for example to include enumeration on only one directory. The source path of a page is relative to your docs/ folder. You can also use globs instead of source paths. For example, to include docs/subfolder/page.md specify in your mkdocs.yml a line under include: with - subfolder/page.md
exclude (default not specified): Specify a list of page source paths (one per line) that should not have enumeration (excluded from processing by this plugin). This can be useful for example to remove enumeration from the front page. The source path of a page is relative to your docs/ folder. You can also use globs instead of source paths. For example, to exclude docs/subfolder/page.md specify in your mkdocs.yml a line under exclude: with - subfolder/page.md
restart_increment_after (default not specified): Specify a list of page source paths (one per line) where enumeration should be restarted. This can be useful if you have multiple reports or tutorials in one mkdocs site. Paths behave as with exclude (can use globs).

Contributing
Contributions are very welcome! Please read CONTRIBUTING.md before putting in any work.
Credits: This plugin was inspired by ignorantshr/mkdocs-add-number-plugin, which focuses on enumerating single selected pages.