markdown-it-toc-ilm

markdown-it-table-of-contents

A table of contents plugin for Markdown-it. Based on https://github.com/oktavilla/markdown-it-table-of-contents but with some additional features to support ILM attribute based overrides. For example, in ILM, only headers with an explicit class .toc(1-4) get added to the table of contents at the level specified. Moreover the optional attribute 'toc' overrides the contents displayed.

(ILM is a private text editor for producing custom audio-aligned ebooks supporting random-access to contents.)

For example:

# Title not Shown TOC {.title}

## Chapter 4. This is Shown in TOC but with a much shorter display title   {toc="4. Shorter Title"}

### This is a subtitle not shown in TOC {.notoc}

### This one is shown in TOC

Usage

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
md.use(require("markdown-it-toc-ilm"));

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

When using with md-ilm module, the parsing object returns a field toc with a useful Table of Contents object.

Options

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
"ilmStyle"	Follow ilm-style TOC rules (keep compatibility)	false
"override_toc"	A function for overriding default selection rules	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;
}

override_toc is an optional function for overriding header selection rules.

function override_toc(heading, op) {
  // op = {isShown (true), displayText (heading), level (1-4}
  // read heading.text, heading.classes, heading.attrs, heading.tag
  // modify and return op: {isShown (bool), displayText (str), level (1-4)} 
  return op;
}