markdown-it-highlightjs

Preset to use highlight.js with markdown-it.

Usage

const md = require('markdown-it')()
  .use(require('markdown-it-highlightjs'), opts)

// All code blocks will be highlighted.

The opts object can contain:

Name	Type	Description	Default
auto	boolean	Whether to automatically detect language if not specified.	true
code	boolean	Whether to add the hljs class to raw code blocks (not fenced blocks).	true
register	object	Register other languages which are not included in the standard pack.	null
inline	boolean	Whether to highlight inline code.	false
hljs	object	Provide the instance of highlight.js to use for highlighting	require('highlight.js')

Register languages

const md = require('markdown-it')()
  .use(require('markdown-it-highlightjs'), {
    register: {
      cypher: require('highlightjs-cypher')
    }
  })

Inline code highlighting

You can enable inline code highlighting by setting inline to true:

const md = require('markdown-it')()
  .use(require('markdown-it-highlightjs'), { inline: true })

You can specify the language for inline code using Pandoc syntax:

`x=4`{.js}

or Kramdown IAL syntax:

`x=4`{:.js}

If you do not specify a language, then highlight.js will attempt to guess the language if auto is true (which it is by default).

Provide the highlight.js instance

You can specify the hljs option to override the default highlight.js instance with your own:

const hljs = require('highlight.js/lib/core')

hljs.registerLanguage(
  'javascript',
  require('highlight.js/lib/languages/javascript')
)

const md = require('markdown-it')()
  .use(require('markdown-it-highlightjs'), { hljs })

Core plugin

You may import the core markdown-it-highlightjs plugin directly, without any default options. You must specify an instance of highlight.js for the hljs option.

const hljs = require('highlight.js/lib/core')
const md = require('markdown-it')()
  .use(require('markdown-it-highlightjs/core'), { hljs })