mdast-util-gfm-autolink-literal
v2.0.1
Published
mdast extension to parse and serialize GFM autolink literals
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mdast-util-gfm-autolink-literal
mdast extensions to parse and serialize GFM autolink literals.
Contents
- What is this?
- When to use this
- Install
- Use
- API
- HTML
- Syntax
- Syntax tree
- Types
- Compatibility
- Related
- Contribute
- License
What is this?
This package contains two extensions that add support for GFM autolink literals
syntax in markdown to mdast.
These extensions plug into
mdast-util-from-markdown
(to support parsing
GFM autolinks in markdown into a syntax tree) and
mdast-util-to-markdown
(to support serializing
GFM autolinks in syntax trees to markdown).
GitHub employs different algorithms to autolink: one at parse time and one at
transform time (similar to how @mentions
are done at transform time).
This difference can be observed because character references and escapes are
handled differently.
But also because issues/PRs/comments omit (perhaps by accident?) the second
algorithm for www.
, http://
, and https://
links (but not for email links).
As the corresponding micromark extension
micromark-extension-gfm-autolink-literal
is a syntax extension,
it can only perform the first algorithm.
The tree extension gfmAutolinkLiteralFromMarkdown
from this package can
perform the second algorithm, and as they are combined, both are done.
When to use this
You can use these extensions when you are working with
mdast-util-from-markdown
and mdast-util-to-markdown
already.
When working with mdast-util-from-markdown
, you must combine this package
with
micromark-extension-gfm-autolink-literal
.
When you don’t need a syntax tree, you can use micromark
directly with micromark-extension-gfm-autolink-literal
.
When you are working with syntax trees and want all of GFM, use
mdast-util-gfm
instead.
All these packages are used remark-gfm
, which
focusses on making it easier to transform content by abstracting these
internals away.
This utility does not handle how markdown is turned to HTML.
That’s done by mdast-util-to-hast
.
Install
This package is ESM only. In Node.js (version 16+), install with npm:
npm install mdast-util-gfm-autolink-literal
In Deno with esm.sh
:
import {gfmAutolinkLiteralFromMarkdown, gfmAutolinkLiteralToMarkdown} from 'https://esm.sh/mdast-util-gfm-autolink-literal@2'
In browsers with esm.sh
:
<script type="module">
import {gfmAutolinkLiteralFromMarkdown, gfmAutolinkLiteralToMarkdown} from 'https://esm.sh/mdast-util-gfm-autolink-literal@2?bundle'
</script>
Use
Say our document example.md
contains:
www.example.com, https://example.com, and [email protected].
…and our module example.js
looks as follows:
import fs from 'node:fs/promises'
import {gfmAutolinkLiteral} from 'micromark-extension-gfm-autolink-literal'
import {fromMarkdown} from 'mdast-util-from-markdown'
import {
gfmAutolinkLiteralFromMarkdown,
gfmAutolinkLiteralToMarkdown
} from 'mdast-util-gfm-autolink-literal'
import {toMarkdown} from 'mdast-util-to-markdown'
const doc = await fs.readFile('example.md')
const tree = fromMarkdown(doc, {
extensions: [gfmAutolinkLiteral()],
mdastExtensions: [gfmAutolinkLiteralFromMarkdown()]
})
console.log(tree)
const out = toMarkdown(tree, {extensions: [gfmAutolinkLiteralToMarkdown()]})
console.log(out)
…now running node example.js
yields (positional info removed for brevity):
{
type: 'root',
children: [
{
type: 'paragraph',
children: [
{
type: 'link',
title: null,
url: 'http://www.example.com',
children: [{type: 'text', value: 'www.example.com'}]
},
{type: 'text', value: ', '},
{
type: 'link',
title: null,
url: 'https://example.com',
children: [{type: 'text', value: 'https://example.com'}]
},
{type: 'text', value: ', and '},
{
type: 'link',
title: null,
url: 'mailto:[email protected]',
children: [{type: 'text', value: '[email protected]'}]
},
{type: 'text', value: '.'}
]
}
]
}
[www.example.com](http://www.example.com), <https://example.com>, and <[email protected]>.
API
This package exports the identifiers
gfmAutolinkLiteralFromMarkdown
and
gfmAutolinkLiteralToMarkdown
.
There is no default export.
gfmAutolinkLiteralFromMarkdown()
Create an extension for mdast-util-from-markdown
to enable GFM autolink literals in markdown.
Returns
Extension for mdast-util-to-markdown
to enable GFM autolink literals
(FromMarkdownExtension
).
gfmAutolinkLiteralToMarkdown()
Create an extension for mdast-util-to-markdown
to
enable GFM autolink literals in markdown.
Returns
Extension for mdast-util-to-markdown
to enable GFM autolink literals
(ToMarkdownExtension
).
HTML
This utility does not handle how markdown is turned to HTML.
That’s done by mdast-util-to-hast
.
Syntax
See Syntax in micromark-extension-gfm-autolink-literal
.
Syntax tree
There are no interfaces added to mdast by this utility, as it reuses the existing Link interface.
Types
This package is fully typed with TypeScript. It does not export additional types.
The Link
type of the mdast nodes is exposed from @types/mdast
.
Compatibility
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,
mdast-util-gfm-autolink-literal@^2
, compatible with Node.js 16.
This utility works with mdast-util-from-markdown
version 2+ and
mdast-util-to-markdown
version 2+.
Related
remarkjs/remark-gfm
— remark plugin to support GFMsyntax-tree/mdast-util-gfm
— same but all of GFM (autolink literals, footnotes, strikethrough, tables, tasklists)micromark/micromark-extension-gfm-autolink-literal
— micromark extension to parse GFM autolink literals
Contribute
See contributing.md
in syntax-tree/.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.