markdown-it-anchor 
Header anchors for markdown-it.
Usage
const md = require('markdown-it')()
.use(require('markdown-it-anchor'), opts)
See a demo as JSFiddle.
The opts
object can contain:
Name | Description | Default |
---|---|---|
level |
Minimum level to apply anchors on or array of selected levels. | 1 |
slugify |
A custom slugification function. | See index.js |
permalink |
Whether to add permalinks next to titles. | false |
renderPermalink |
A custom permalink rendering function. | See index.js |
permalinkClass |
The class of the permalink anchor. | header-anchor |
permalinkSpace |
Place space between the header text and the permalink anchor. | true |
permalinkSymbol |
The symbol in the permalink anchor. | ¶ |
permalinkBefore |
Place the permalink before the title. | false |
permalinkHref |
A custom permalink href rendering function. |
See index.js |
permalinkAttrs |
A custom permalink attributes rendering function. | See index.js |
callback |
Called with token and info after rendering. | undefined |
The renderPermalink
function takes the slug, an options
object with the above options, and then all the usual markdown-it
rendering arguments.
All headers above level
will then have an
id
attribute with a slug of their content.
level
can also be an array of headers levels to apply the
anchor, like [2, 3]
to have an anchor on only level 2 and 3
headers.
If permalink
is true
, a ¶
symbol linking to the header itself will be added.
You may want to use the link
symbol as permalinkSymbol
, or a symbol from your
favorite web font.
The callback
option is a function that will be called at
the end of rendering with the token
and an
info
object. The info
object has
title
and slug
properties with the token
content and the slug used for the identifier.
User-Friendly URLs
Starting from v5.0.0
, markdown-it-anchor
dropped package string
keeping it’s core value of being an
unopinionated and secure library. Yet, users looking for backward
compatibility may want the old slugify:
$ npm i -S string
const string = require('string')
const legacySlugify = s => string(s).slugify().toString()
const md = require('markdown-it')()
const anchor = require('markdown-it-anchor', {
slugify: legacySlugify
})
Unicode Support
Unicode is supported by default. Yet, if you are looking for a
“prettier” –opinionated– link, i.e without %xx, you may want to
take a look at uslug
:
$ npm i -S uslug
const uslug = require('uslug')
const uslugify = s => uslug(s)
const md = require('markdown-it')()
const anchor = require('markdown-it-anchor', {
slugify: uslugify
})
Table of Contents
Looking for an automatic table of contents (TOC) generator? Take a look at markdown-it-toc-done-right it’s made from the ground to be a great companion of this plugin.