30-seconds-of-code/node_modules/mdast-util-toc

mdast-util-toc

Generate a Table of Contents from a mdast tree.

Installation

npm:

npm install mdast-util-toc

mdast-util-toc is also available as an AMD, CommonJS, and globals module, uncompressed and compressed.

Usage

Dependencies:

var remark = require('remark');
var toc = require('mdast-util-toc');

Parse:

var node = remark().parse([
    '# Alpha',
    '',
    '## Bravo',
    '',
    '### Charlie',
    '',
    '## Delta',
    ''
].join('\n'));

TOC:

var result = toc(node);

Yields:

{ index: null,
  endIndex: null,
  map: 
   { type: 'list',
     ordered: false,
     children: [ { type: 'listItem', loose: true, children: [Object] } ] } }

API

toc(node[, options])

Generate a Table of Contents from a Markdown document.

• If specified, looks for the first heading containing the heading option (case insensitive, supports alt/title attributes for links and images too), and returns a table of contents for all following headings.

• If no heading is specified, creates a table of contents for all headings in node.

Links to headings are based on GitHub’s style. Only top-level headings (those not in blockquotes or lists), are used. The given node is not modified.

options

• heading (string?) — Heading to look for, wrapped in new RegExp('^(' + value + ')$', 'i');

• maxDepth (number?, default: 6) — Maximum heading depth to include in the table of contents, This is inclusive, thus, when set to 3, level three headings, are included (those with three hashes, ###);

• tight (boolean?, default: false) — Whether to compile list-items tightly.

Returns

An object with the following properties:

• index (number?) — Position of the heading in node. -1 if no heading was found, null if no heading was given;

• endIndex (number?) — Position of the last node after heading before the TOC starts. -1 if no heading was found, null if no heading was given, same as index if there are no nodes between heading and the first heading in the TOC;

• map (Node?) — List node representing the generated table of contents. null if no table of contents could be created, either because no heading didn’t exist, or no following headings were found.

License

MIT © Jonathan Haines