add nesting
This is a Python port of markdown-it, and some of its associated plugins. It is still under development, so for now should be used with caution.
Details of the port can be found in markdown_it/port.yaml and in port.yaml within the extension folders. But the driving design philosiphy has been to change as little of the fundamental code structure (file names, function name, etc) as possible. It is very simple to write complimentary extensions for both language implementations!
Basic usage:
from markdown_it import MarkdownIt from markdown_it.extensions.front_matter import front_matter_plugin from markdown_it.extensions.footnote import footnote_plugin md = ( MarkdownIt() .use(front_matter_plugin) .use(footnote_plugin) .disable('image') .enable('table') ) tokens = md.parse("some text") text = md.render("some text")
Also you can use it from the command-line:
$ markdown-it markdown-it-py [version 0.1.0] (interactive) Type Ctrl-D to complete input, or Ctrl-C to exit. >>> > **hallo** there! ... <blockquote> <p><strong>hallo</strong> there!</p> </blockquote>
markdown-it=py is the fastest CommonMark compliant parser written in python!
$ markdown-it-bench -n 30 Test document: spec.md Test iterations: 30 Running 7 test(s) ... ===================== [mistune (0.8.4): 3.62 s]* markdown-it-py (0.1.0): 9.03 s mistletoe (0.10.0): 9.89 s commonmark-py (0.9.1): 20.82 s pymarkdown (3.2.1): 34.50 s pymarkdown:extra (3.2.1): 41.86 s panflute (1.12.5): 35.02 s
*Note mistune is not CommonMark compliant, which is what allows for its faster parsing, at the expense of issues, for example, with nested inline parsing. See mistletoes's explanation for further details.
Markdown parser done right. Fast and easy to extend.
Table of content
node.js & bower:
npm install markdown-it --save bower install markdown-it --save
browser (CDN):
See also:
// node.js, "classic" way: var MarkdownIt = require('markdown-it'), md = new MarkdownIt(); var result = md.render('# markdown-it rulezz!'); // node.js, the same, but with sugar: var md = require('markdown-it')(); var result = md.render('# markdown-it rulezz!'); // browser without AMD, added to "window" on script load // Note, there is no dash in "markdownit". var md = window.markdownit(); var result = md.render('# markdown-it rulezz!');
Single line rendering, without paragraph wrap:
var md = require('markdown-it')(); var result = md.renderInline('__markdown-it__ rulezz!');
(*) presets define combinations of active rules and options. Can be "commonmark", "zero" or "default" (if skipped). See API docs for more details.
// commonmark mode var md = require('markdown-it')('commonmark'); // default mode var md = require('markdown-it')(); // enable everything var md = require('markdown-it')({ html: true, linkify: true, typographer: true }); // full options list (defaults) 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. 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 <pre... internal wrapper is skipped. highlight: function (/*str, lang*/) { return ''; } });
var md = require('markdown-it')() .use(plugin1) .use(plugin2, opts, ...) .use(plugin3);
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 (__) {} } return ''; // use external default escaping } });
Or with full wrapper override (if you need assign class to <pre>):
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 '<pre class="hljs"><code>' + hljs.highlight(lang, str, true).value + '</code></pre>'; } catch (__) {} } return '<pre class="hljs"><code>' + md.utils.escapeHtml(str) + '</code></pre>'; } });
linkify: true uses linkify-it. To configure linkify-it, access the linkify instance through md.linkify:
md.linkify.tlds('.py', false); // disables .py as top level domain
If you are going to write plugins - take a look at Development info.
Embedded (enabled by default):
Via plugins:
By default all rules are enabled, but can be restricted by options. On plugin load all its rules are enabled automatically.
// Activate/deactivate rules, with curring var md = require('markdown-it')() .disable([ 'link', 'image' ]) .enable([ 'link' ]) .enable('image'); // Enable everything md = require('markdown-it')({ html: true, linkify: true, typographer: true, });
You can find all rules in sources: parser_core.js, parser_block, parser_inline.
Here is the result of readme parse at MB Pro Retina 2013 (2.4 GHz):
make benchmark-deps benchmark/benchmark.js 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 ~ 1.5x.
As you can see, markdown-it doesn‘t pay with speed for it’s flexibility. Slowdown of “full” version caused by additional features not available in other implementations.
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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.
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:
Ports