unified

Project: syntax-tree/mdast-normalize-headings

Package: mdast-normalize-headings@2.0.0

  1. Dependencies: 1·Dependents: 3
  2. mdast utility to make sure there is no more than a single top-level heading in the document
  1. util 118
  2. utility 114
  3. unist 110
  4. mdast 81
  5. tree 42
  6. heading 26
  7. mdast-util 24
  8. depth 5
  9. level 5
  10. count 4
  11. header 2
  12. title 2

mdast-normalize-headings

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mdast utility to make sure that there is only one top-level heading in the document by adjusting headings depths accordingly.

Providing multiple top-level headings per single markdown document is confusing for tools that assume that there is only a single top-level heading that contains some meta-information (usually title) about the document.

Install

npm:

npm install mdast-normalize-headings

Use

var u = require('unist-builder')
var normalizeHeadings = require('mdast-normalize-headings')

var tree = u('root', [
  u('heading', {depth: 1}, [u('text', 'title')]),
  u('heading', {depth: 2}, [u('text', 'description')]),
  u('heading', {depth: 1}, [u('text', 'example')])
])

console.log(tree)

normalizeHeadings(tree)

console.log(tree)

Yields:

{ type: 'root',
  children:
   [ { type: 'heading', depth: 1, children: [Array] },
     { type: 'heading', depth: 2, children: [Array] },
     { type: 'heading', depth: 1, children: [Array] } ] }
{ type: 'root',
  children:
   [ { type: 'heading', depth: 1, children: [Array] },
     { type: 'heading', depth: 3, children: [Array] },
     { type: 'heading', depth: 2, children: [Array] } ] }

API

normalizeHeadings(tree)

Modifies tree in-place. Returns tree.

Security

Use of mdast-normalize-headings does not involve hast so there are no openings for cross-site scripting (XSS) attacks.

Contribute

See contributing.md in syntax-tree/.github for ways to get started. See support.md for ways to get help.

This project has a code of conduct. By interacting with this repository, organization, or community you agree to abide by its terms.

License

MIT © Eugene Sharygin