Markdown parser, done right. 100% CommonMark support, extensions, syntax plugins & high speed https://markdown-it.github.io/
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
Vitaly Puzrin 958308a3b0 Added `zero` preset. Related to #12 10 years ago
benchmark Configs & code cleanup 10 years ago
bin Changed project name, links, attribution & updated constructor call 10 years ago
dist browser files rebuild 10 years ago
lib Added `zero` preset. Related to #12 10 years ago
support Updated line breaks rendering logic 10 years ago
test Added `zero` preset. Related to #12 10 years ago
.editorconfig Fix .editorconfig 10 years ago
.eslintignore Refactored demo 10 years ago
.eslintrc eslint rules & coding style update 10 years ago
.gitignore Refactored demo 10 years ago
.npmignore .*ignore update 10 years ago
.travis.yml Added coverall.io integration 10 years ago
CHANGELOG.md 2.1.3 released 10 years ago
CONTRIBUTING.md Changed project name, links, attribution & updated constructor call 10 years ago
LICENSE Changed project name, links, attribution & updated constructor call 10 years ago
Makefile Simplified demo build script, updated GA id 10 years ago
README.md Added `zero` preset. Related to #12 10 years ago
bower.json Configs & code cleanup 10 years ago
index.js Renamed main class & file 10 years ago
package.json 2.1.3 released 10 years ago

README.md

markdown-it

Build Status NPM version Coverage Status

Markdown parser done right. Fast and easy to extend.

Live demo

  • Supports the CommonMark spec + syntax extensions + sugar (URL autolinking, typographer).
  • Configurable syntax! You can add new rules and even replace existing ones.
  • High speed!
  • Community written plugins and other packages on npm.

Table of content

Install

node.js & bower:

npm install markdown-it --save
bower install markdown-it --save

browser (CDN):

Usage

// node.js, "classic" way:
var MarkdownIt = require('markdown-it'),
    md = new MarkdownIt();
console.log(md.render('# markdown-it rulezz!'));

// node.js, the same, but with sugar:
var md = require('markdown-it')();
console.log(md.render('# markdown-it rulezz!'));

// browser without AMD, added to "window" on script load
// Note, there are no dash.
var md = window.markdownit();
console.log(md.render('# markdown-it rulezz!'));

Single lines rendering, without paragraph wrap:

var md = require('markdown-it')();
console.log(md.renderInline('__markdown-it__ rulezz!'));

Configuring

By default markdown-it is configured to be similar to GFM, but with HTML disabled. This is easy to change if you prefer different settings.

Usually, you will define everything via constructor.

constructor(preset, options)

preset (String) - "full"|"commonmark", optional.

markdown-it offers some presets as a convenience to quickly enable/disable active syntax rules and options for common use cases.

  • "commonmark" - enable strict CommonMark mode.
  • "full" - all rules enabled, but still without html, typographer & autolinker.
  • default - when no preset name given.
  • zero - all rules disabled (useful to quickly setup your config via .enable()).
// commonmark mode
var md = require('markdown-it')('commonmark');

// default mode
var md = require('markdown-it')();

// enable everything
var md = require('markdown-it')('full', {
  html: true,
  linkify: true,
  typographer: true
});

options

// Actual default values
var md = require('markdown-it')({
  html:         false,        // Enable HTML tags in source
  xhtmlOut:     false,        // Use '/' to close single tags (<br />).
                              // This is only for full CommonMark compatibility.
  breaks:       false,        // Convert '\n' in paragraphs into <br>
  langPrefix:   'language-',  // CSS language prefix for fenced blocks. Can be
                              // useful for external highlighters.
  linkify:      false,        // Autoconvert URL-like text to links

  // Enable some language-neutral replacement + quotes beautification
  typographer:  false,

  // Double + single quotes replacement pairs, when typographer enabled,
  // and smartquotes on. Set doubles to '«»' for Russian, '„“' for German.
  quotes: '“”‘’',

  // Highlighter function. Should return escaped HTML,
  // or '' if the source string is not changed and should be escaped externaly.
  highlight: function (/*str, lang*/) { return ''; }
});

.set({ keys: values })

Probably, you will never need it. But you can change options after constructor call.

var md = require('markdown-it')()
            .set({ html: true, breaks: true })
            .set({ typographer, true });

Note: To achieve the best possible performance, don't modify a markdown-it instance on the fly. If you need multiple configurations it's best to create multiple instances and initialize each with separate config.

.use(plugin, options)

Sugar to activate plugins.

var md = require('markdown-it')()
            .use(plugin1)
            .use(plugin2, opts)
            .use(plugin3);

Syntax highlighting

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

var hljs = require('highlight.js') // https://highlightjs.org/

// Actual default values
var md = require('markdown-it')({
  highlight: function (str, lang) {
    if (lang && hljs.getLanguage(lang)) {
      try {
        return hljs.highlight(lang, str).value;
      } catch (err) {}
    }

    try {
      return hljs.highlightAuto(str).value;
    } catch (err) {}

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

Typographer

Although full-weight typographical replacements are language specific, markdown-it provides coverage for the most common and universal use cases:

var md = require('markdown-it')({
  typographer: true,
  quotes: '“”‘’'
});

// Disable rules at all:
md.disable([ 'replacements', 'smartquotes' ]);

// Actual default replacements:
//
// '' → ‘’
// "" → “”. Set '«»' for Russian, '„“' for German, empty to disable
// (c) (C) → ©
// (tm) (TM) → ™
// (r) (R) → ®
// +- → ±
// (p) (P) -> §
// ... → … (also ?.... → ?.., !.... → !..)
// ???????? → ???, !!!!! → !!!, `,,` → `,`
// -- → &ndash;, --- → &mdash;
//

Of course, you can also add your own rules or replace the defaults with something more advanced or specific to your language.

Syntax extensions

Enabled by default:

  • Tables (GFM)
  • <del> (GFM strikethrough) - ~~deleted text~~

Disabled by default:

* Experimental extensions can be changed later for something like Critic Markup, but you will still be able to use old-style rules via external plugins if you prefer.

Manage rules

// Activate/deactivate rules
var md = require('markdown-it')()
            .enable([ 'ins', 'mark' ])
            .disable([ 'table' ]);

// Enable everything
md = require('markdown-it')('full', {
  html: true,
  linkify: true,
  typographer: true,
});

// Manually enable rules, disabled by default:
var md = require('markdown-it')()
            .enable([
              /* core */
              'abbr',
              /* block */
              'footnote',
              'deflist',
              /* inline */
              'footnote_inline',
              'ins',
              'mark',
              'sub',
              'sup'
            ]);

Benchmark

Here is result of CommonMark spec parse at Core i5 2.4 GHz (i5-4258U):

$ benchmark/benchmark.js spec
Selected samples: (1 of 27)
 > spec

Sample: spec.txt (110610 bytes)
 > commonmark-reference x 40.42 ops/sec ±4.07% (51 runs sampled)
 > current x 74.99 ops/sec ±4.69% (67 runs sampled)
 > current-commonmark x 93.76 ops/sec ±1.23% (79 runs sampled)
 > marked-0.3.2 x 22.92 ops/sec ±0.79% (41 runs sampled)

As you can see, markdown-it doesn't pay with speed for it's flexibility. Because it's written in monomorphyc style and use JIT inline caches effectively.

Authors

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:

License

MIT