markdown-it


> Markdown parser done right. Fast and easy to extend.

__Live demo__

- Follows the __CommonMark spec__ + adds syntax extensions & sugar (URL autolinking, typographer).
- Configurable syntax! You can add new rules and even replace existing ones.
- High speed.
- Safe by default.
- Community-written __plugins__ and other packages on npm.

__Table of content__

- Install
- Usage examples
- Simple
- Init with presets and options
- Plugins load
- Syntax highlighting
- Linkify
- API
- Syntax extensions
- Manage rules
- Benchmark
- markdown-it for enterprise
- Authors
- References / Thanks

Install

node.js:

``bash
npm install markdown-it
`

browser (CDN):

- jsDeliver CDN
- cdnjs.com CDN

Usage examples

See also:

- __API documentation__ - for more
info and examples.
- Development info -
for plugins writers.

$3

`js
// node.js
// can use require('markdown-it') for CJS
import markdownit from 'markdown-it'
const md = markdownit()
const result = md.render('# markdown-it rulezz!');

// browser with UMD build, added to "window" on script load
// Note, there is no dash in "markdownit".
const md = window.markdownit();
const result = md.render('# markdown-it rulezz!');
`

Single line rendering, without paragraph wrap:

`js
import markdownit from 'markdown-it'
const md = markdownit()
const result = md.renderInline('__markdown-it__ rulezz!');
`

$3

(*) presets define combinations of active rules and options. Can be
"commonmark", "zero" or "default" (if skipped). See
API docs for more details.

`js
import markdownit from 'markdown-it'

// commonmark mode
const md = markdownit('commonmark')

// default mode
const md = markdownit()

// enable everything
const md = markdownit({
html: true,
linkify: true,
typographer: true
})

// full options list (defaults)
const md = markdownit({
// Enable HTML tags in source
html: false,

// Use '/' to close single tags (
).
// This is only for full CommonMark compatibility.
xhtmlOut: false,

// Convert '\n' in paragraphs into

breaks: false,

// CSS language prefix for fenced blocks. Can be
// useful for external highlighters.
langPrefix: 'language-',

// Autoconvert URL-like text to links
linkify: false,

// Enable some language-neutral replacement + quotes beautification
// For the full list of replacements, see https://github.com/markdown-it/markdown-it/blob/master/lib/rules_core/replacements.mjs
typographer: false,

// Double + single quotes replacement pairs, when typographer enabled,
// and smartquotes on. Could be either a String or an Array.
//
// For example, you can use '«»„“' for Russian, '„“‚‘' for German,
// and ['«\xA0', '\xA0»', '‹\xA0', '\xA0›'] for French (including nbsp).
quotes: '“”‘’',

// Highlighter function. Should return escaped HTML,
// or '' if the source string is not changed and should be escaped externally.
// If result starts with highlight: function (/str, lang/) { return ''; }
});
`

$3

`js
import markdownit from 'markdown-it'

const md = markdownit
.use(plugin1)
.use(plugin2, opts, ...)
.use(plugin3);
`

$3

Apply syntax highlighting to fenced code blocks with the highlight option:

`js
import markdownit from 'markdown-it'
import hljs from 'highlight.js' // https://highlightjs.org

// Actual default values
const md = markdownit({
highlight: function (str, lang) {
if (lang && hljs.getLanguage(lang)) {
try {
return hljs.highlight(str, { language: lang }).value;
} catch (__) {}
}

return ''; // use external default escaping
}
});
`

Or with full wrapper override (if you need assign class to

 or ):
`js
import markdownit from 'markdown-it'
import hljs from 'highlight.js' // https://highlightjs.org
// Actual default values
const md = markdownit({
  highlight: function (str, lang) {
    if (lang && hljs.getLanguage(lang)) {
      try {
        return '
' +
               hljs.highlight(str, { language: lang, ignoreIllegals: true }).value +
               '
';
      } catch (__) {}
    }
    return '
' + md.utils.escapeHtml(str) + '
';
  }
});
`
$3
linkify: true uses linkify-it. To
configure linkify-it, access the linkify instance through md.linkify:
`js
md.linkify.set({ fuzzyEmail: false });  // disables converting email to link
`

API
__API documentation__
If you are going to write plugins, please take a look at
Development info.

Syntax extensions
Embedded (enabled by default):
- Tables (GFM)
- Strikethrough (GFM)
Via plugins:
- subscript
- superscript
- footnote
- definition list
- abbreviation
- emoji
- custom container
- insert
- mark
- ... and others

$3
By default all rules are enabled, but can be restricted by options. On plugin
load all its rules are enabled automatically.
`js
import markdownit from 'markdown-it'
// Activate/deactivate rules, with currying
const md = markdownit()
  .disable(['link', 'image'])
  .enable(['link'])
  .enable('image');
// Enable everything
const md = markdownit({
  html: true,
  linkify: true,
  typographer: true,
});
`
You can find all rules in sources:
- parser_core.mjs
- parser_block.mjs
- parser_inline.mjs

Benchmark
Here is the result of readme parse at MB Pro Retina 2013 (2.4 GHz):
`bash
npm run benchmark-deps
benchmark/benchmark.mjs readme
Selected samples: (1 of 28)
 > README
Sample: README.md (7774 bytes)
 > commonmark-reference x 1,222 ops/sec ±0.96% (97 runs sampled)
 > current x 743 ops/sec ±0.84% (97 runs sampled)
 > current-commonmark x 1,568 ops/sec ±0.84% (98 runs sampled)
 > marked x 1,587 ops/sec ±4.31% (93 runs sampled)
`
__Note.__ CommonMark version runs with simplified link normalizers
for more "honest" compare. Difference is ≈1.5×.
As you can see, markdown-it doesn't pay with speed for its flexibility.
Slowdown of "full" version caused by additional features not available in
other implementations.

markdown-it for enterprise
Available as part of the Tidelift Subscription.
The maintainers of markdown-it` and thousands of other packages are working with Tidelift to deliver commercial support and maintenance for the open source dependencies you use to build your applications. Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use. Learn more.

Authors
- Alex Kocharin github/rlidwka
- Vitaly Puzrin github/puzrin
_markdown-it_ is the result of the decision of the authors who contributed to
99% of the _Remarkable_ code to move to a project with the same authorship but
new leadership (Vitaly and Alex). It's not a fork.
References / Thanks
Big thanks to John MacFarlane for his work on the
CommonMark spec and reference implementations. His work saved us a lot of time
during this project's development.
Related Links:
- https://github.com/jgm/CommonMark - reference CommonMark implementations in C & JS,
  also contains latest spec & online demo.
- http://talk.commonmark.org - CommonMark forum, good place to collaborate
  developers' efforts.
Ports
- motion-markdown-it - Ruby/RubyMotion
- markdown-it-py- Python