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A table of contents plugin for Markdown-it. Based on but simpler, a bit more customizable and with a default slugifier that matches that of


var MarkdownIt = require("markdown-it");
var md = new MarkdownIt();
md.use(require("markdown-it-anchor")); // Optional, but makes sense as you really want to link to something 

Then add [[toc]] where you want the table of contents to be added in your markdown.

Example markdown

This markdown:

## Sub heading 1
Some nice text
## Sub heading 2
Some even nicer text

... would render this HTML using the default options specified in "usage" above:

<h1 id="heading">Heading</h1>
<div class="table-of-contents">
    <li><a href="#heading">Heading</a>
        <li><a href="#sub-heading-1">Sub heading 1</a></li>
        <li><a href="#sub-heading-2">Sub heading 2</a></li>
<h2 id="sub-heading-1">Sub heading 1</h2>
<p>Some nice text</p>
<h2 id="sub-heading-2">Sub heading 2</h2>
<p>Some even nicer text</p>


You may specify options when useing the plugin. like so:

md.use(require("markdown-it-table-of-contents"), options);

These options are available:

Name Description Default
"includeLevel" Headings levels to use (2 for h2:s etc) [1, 2]
"containerClass" The class for the container DIV "table-of-contents"
"slugify" A custom slugification function string.js' slugify
"markerPattern" Regex pattern of the marker to be replaced with TOC /^\[\[toc\]\]/im
"listType" Type of list (ul for unordered, ol for ordered) ul
"format" A function for formatting headings (see below) undefined

format is an optional function for changing how the headings are displayed in the TOC.

function format(headingAsString) {
  // manipulate the headings as you like here. 
  return manipulatedHeadingString;