micromark extensions to support GitHub flavored markdown (GFM).
- What is this?
- When to use this
- Install
- Use
- API
- Bugs
- Authoring
- HTML
- CSS
- Syntax
- Types
- Compatibility
- Security
- Contribute
- License
This package contains extensions that add support for all features enabled by
GFM to micromark.
It supports autolink literals, footnotes, strikethrough, tables, tagfilter, and
tasklists.
This project is useful when you want to support GFM in markdown.
You can use these extensions when you are working with micromark.
Alternatively, you can also use the underlying features separately:
micromark-extension-gfm-autolink-literal— support GFM autolink literalsmicromark-extension-gfm-footnote— support GFM footnotesmicromark-extension-gfm-strikethrough— support GFM strikethroughmicromark-extension-gfm-table— support GFM tablesmicromark-extension-gfm-tagfilter— support GFM tagfiltermicromark-extension-gfm-task-list-item— support GFM tasklists
When you need a syntax tree, combine this package with
mdast-util-gfm.
All these packages are used in remark-gfm, which focusses on
making it easier to transform content by abstracting these internals away.
This package is ESM only. In Node.js (version 16+), install with npm:
npm install micromark-extension-gfmIn Deno with esm.sh:
import {gfm, gfmHtml} from 'https://esm.sh/micromark-extension-gfm@3'In browsers with esm.sh:
<script type="module">
import {gfm, gfmHtml} from 'https://esm.sh/micromark-extension-gfm@3?bundle'
</script>Say our document example.md contains:
# GFM
## Autolink literals
www.example.com, https://example.com, and [email protected].
## Footnote
A note[^1]
[^1]: Big note.
## Strikethrough
~one~ or ~~two~~ tildes.
## Table
| a | b | c | d |
| - | :- | -: | :-: |
## Tag filter
<plaintext>
## Tasklist
* [ ] to do
* [x] done…and our module example.js looks as follows:
import fs from 'node:fs/promises'
import {micromark} from 'micromark'
import {gfm, gfmHtml} from 'micromark-extension-gfm'
const output = micromark(await fs.readFile('example.md'), {
allowDangerousHtml: true,
extensions: [gfm()],
htmlExtensions: [gfmHtml()]
})
console.log(output)…now running node example.js yields:
<h1>GFM</h1>
<h2>Autolink literals</h2>
<p><a href="http://www.example.com">www.example.com</a>, <a href="https://example.com">https://example.com</a>, and <a href="mailto:[email protected]">[email protected]</a>.</p>
<h2>Footnote</h2>
<p>A note<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup></p>
<h2>Strikethrough</h2>
<p><del>one</del> or <del>two</del> tildes.</p>
<h2>Table</h2>
<table>
<thead>
<tr>
<th>a</th>
<th align="left">b</th>
<th align="right">c</th>
<th align="center">d</th>
</tr>
</thead>
</table>
<h2>Tag filter</h2>
<plaintext>
<h2>Tasklist</h2>
<ul>
<li><input type="checkbox" disabled="" /> to do</li>
<li><input type="checkbox" disabled="" checked="" /> done</li>
</ul>
<section data-footnotes="" class="footnotes"><h2 id="footnote-label" class="sr-only">Footnotes</h2>
<ol>
<li id="user-content-fn-1">
<p>Big note. <a href="#user-content-fnref-1" data-footnote-backref="" class="data-footnote-backref" aria-label="Back to content">↩</a></p>
</li>
</ol>
</section>This package exports the identifiers gfm and
gfmHtml.
There is no default export.
The separate extensions support the development condition.
Run node --conditions development module.js to get instrumented dev code.
Without this condition, production code is loaded.
Create an extension for micromark to enable GFM syntax.
options(Options, optional) — configuration; passed tomicromark-extens-gfm-strikethrough
Extension for micromark that can be passed in extensions to enable GFM
syntax (Extension).
Create an extension for micromark to support GFM when serializing to HTML.
options(HtmlOptions, optional) — configuration; passed tomicromark-extens-gfm-footnote
Extension for micromark that can be passed in htmlExtensions to support GFM
when serializing to HTML (HtmlExtension).
Configuration for syntax (TypeScript type).
export type {Options} from 'micromark-extension-gfm-strikethrough'Configuration for HTML (TypeScript type).
export type {HtmlOptions} from 'micromark-extension-gfm-footnote'For bugs present in GFM but not here, or other peculiarities that are supported, see each corresponding readme:
- autolink literal
- footnote
- strikethrough: n/a
- table
- tagfilter: n/a
- tasklists: n/a
For recommendations on how to author GFM, see each corresponding readme:
- autolink literal
- footnote
- strikethrough
- table
- tagfilter: n/a
- tasklists
For info on what HTML features GFM relates to, see each corresponding readme:
For info on how GitHub styles these features, see each corresponding readme:
- autolink literal
- footnote
- strikethrough
- table
- tagfilter: n/a
- tasklists
For info on the syntax of these features, see each corresponding readme:
- autolink literal
- footnote
- strikethrough
- table
- tagfilter: n/a
- tasklists
This package is fully typed with TypeScript.
It exports the additional types HtmlOptions and
Options.
Projects maintained by the unified collective are compatible with maintained versions of Node.js.
When we cut a new major release, we drop support for unmaintained versions of
Node.
This means we try to keep the current release line,
micromark-extension-gfm@^3, compatible with Node.js 16.
This package works with micromark version 3 and later.
This package is safe.
Setting clobberPrefix = '' is dangerous, it opens you up to DOM clobbering.
The labelTagName and labelAttributes options are unsafe when used with user
content, they allow defining arbitrary HTML.
See contributing.md in micromark/.github for ways to get
started.
See support.md for ways to get help.
This project has a code of conduct. By interacting with this repository, organization, or community you agree to abide by its terms.
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