351 lines
9.7 KiB
Markdown
351 lines
9.7 KiB
Markdown
# mdast-util-gfm-strikethrough
|
||
|
||
[![Build][build-badge]][build]
|
||
[![Coverage][coverage-badge]][coverage]
|
||
[![Downloads][downloads-badge]][downloads]
|
||
[![Size][size-badge]][size]
|
||
[![Sponsors][sponsors-badge]][collective]
|
||
[![Backers][backers-badge]][collective]
|
||
[![Chat][chat-badge]][chat]
|
||
|
||
[mdast][] extensions to parse and serialize [GFM][] strikethrough.
|
||
|
||
## Contents
|
||
|
||
* [What is this?](#what-is-this)
|
||
* [When to use this](#when-to-use-this)
|
||
* [Install](#install)
|
||
* [Use](#use)
|
||
* [API](#api)
|
||
* [`gfmStrikethroughFromMarkdown()`](#gfmstrikethroughfrommarkdown)
|
||
* [`gfmStrikethroughToMarkdown()`](#gfmstrikethroughtomarkdown)
|
||
* [HTML](#html)
|
||
* [Syntax](#syntax)
|
||
* [Syntax tree](#syntax-tree)
|
||
* [Nodes](#nodes)
|
||
* [Content model](#content-model)
|
||
* [Types](#types)
|
||
* [Compatibility](#compatibility)
|
||
* [Related](#related)
|
||
* [Contribute](#contribute)
|
||
* [License](#license)
|
||
|
||
## What is this?
|
||
|
||
This package contains two extensions that add support for GFM strikethrough
|
||
syntax in markdown to [mdast][].
|
||
These extensions plug into
|
||
[`mdast-util-from-markdown`][mdast-util-from-markdown] (to support parsing
|
||
strikethrough in markdown into a syntax tree) and
|
||
[`mdast-util-to-markdown`][mdast-util-to-markdown] (to support serializing
|
||
strikethrough in syntax trees to markdown).
|
||
|
||
## 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-strikethrough`][extension].
|
||
|
||
When you don’t need a syntax tree, you can use [`micromark`][micromark]
|
||
directly with `micromark-extension-gfm-strikethrough`.
|
||
|
||
When you are working with syntax trees and want all of GFM, use
|
||
[`mdast-util-gfm`][mdast-util-gfm] instead.
|
||
|
||
All these packages are used [`remark-gfm`][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`][mdast-util-to-hast].
|
||
If you want a different element, you should configure that utility.
|
||
|
||
## Install
|
||
|
||
This package is [ESM only][esm].
|
||
In Node.js (version 16+), install with [npm][]:
|
||
|
||
```sh
|
||
npm install mdast-util-gfm-strikethrough
|
||
```
|
||
|
||
In Deno with [`esm.sh`][esmsh]:
|
||
|
||
```js
|
||
import {gfmStrikethroughFromMarkdown, gfmStrikethroughToMarkdown} from 'https://esm.sh/mdast-util-gfm-strikethrough@2'
|
||
```
|
||
|
||
In browsers with [`esm.sh`][esmsh]:
|
||
|
||
```html
|
||
<script type="module">
|
||
import {gfmStrikethroughFromMarkdown, gfmStrikethroughToMarkdown} from 'https://esm.sh/mdast-util-gfm-strikethrough@2?bundle'
|
||
</script>
|
||
```
|
||
|
||
## Use
|
||
|
||
Say our document `example.md` contains:
|
||
|
||
```markdown
|
||
*Emphasis*, **importance**, and ~~strikethrough~~.
|
||
```
|
||
|
||
…and our module `example.js` looks as follows:
|
||
|
||
```js
|
||
import fs from 'node:fs/promises'
|
||
import {gfmStrikethrough} from 'micromark-extension-gfm-strikethrough'
|
||
import {fromMarkdown} from 'mdast-util-from-markdown'
|
||
import {gfmStrikethroughFromMarkdown, gfmStrikethroughToMarkdown} from 'mdast-util-gfm-strikethrough'
|
||
import {toMarkdown} from 'mdast-util-to-markdown'
|
||
|
||
const doc = await fs.readFile('example.md')
|
||
|
||
const tree = fromMarkdown(doc, {
|
||
extensions: [gfmStrikethrough()],
|
||
mdastExtensions: [gfmStrikethroughFromMarkdown()]
|
||
})
|
||
|
||
console.log(tree)
|
||
|
||
const out = toMarkdown(tree, {extensions: [gfmStrikethroughToMarkdown()]})
|
||
|
||
console.log(out)
|
||
```
|
||
|
||
Now, running `node example` yields:
|
||
|
||
```js
|
||
{
|
||
type: 'root',
|
||
children: [
|
||
{
|
||
type: 'paragraph',
|
||
children: [
|
||
{type: 'emphasis', children: [{type: 'text', value: 'Emphasis'}]},
|
||
{type: 'text', value: ', '},
|
||
{type: 'strong', children: [{type: 'text', value: 'importance'}]},
|
||
{type: 'text', value: ', and '},
|
||
{type: 'delete', children: [{type: 'text', value: 'strikethrough'}]},
|
||
{type: 'text', value: '.'}
|
||
]
|
||
}
|
||
]
|
||
}
|
||
```
|
||
|
||
```markdown
|
||
*Emphasis*, **importance**, and ~~strikethrough~~.
|
||
```
|
||
|
||
## API
|
||
|
||
This package exports the identifiers
|
||
[`gfmStrikethroughFromMarkdown`][api-gfm-strikethrough-from-markdown] and
|
||
[`gfmStrikethroughToMarkdown`][api-gfm-strikethrough-to-markdown].
|
||
There is no default export.
|
||
|
||
### `gfmStrikethroughFromMarkdown()`
|
||
|
||
Create an extension for [`mdast-util-from-markdown`][mdast-util-from-markdown]
|
||
to enable GFM strikethrough in markdown.
|
||
|
||
###### Returns
|
||
|
||
Extension for `mdast-util-from-markdown` to enable GFM strikethrough
|
||
([`FromMarkdownExtension`][from-markdown-extension]).
|
||
|
||
### `gfmStrikethroughToMarkdown()`
|
||
|
||
Create an extension for [`mdast-util-to-markdown`][mdast-util-to-markdown] to
|
||
enable GFM strikethrough in markdown.
|
||
|
||
###### Returns
|
||
|
||
Extension for `mdast-util-to-markdown` to enable GFM strikethrough
|
||
([`ToMarkdownExtension`][to-markdown-extension]).
|
||
|
||
## HTML
|
||
|
||
This utility does not handle how markdown is turned to HTML.
|
||
That’s done by [`mdast-util-to-hast`][mdast-util-to-hast].
|
||
If you want a different element, you should configure that utility.
|
||
|
||
## Syntax
|
||
|
||
See [Syntax in `micromark-extension-gfm-strikethrough`][syntax].
|
||
|
||
## Syntax tree
|
||
|
||
The following interfaces are added to **[mdast][]** by this utility.
|
||
|
||
### Nodes
|
||
|
||
#### `Delete`
|
||
|
||
```idl
|
||
interface Delete <: Parent {
|
||
type: 'delete'
|
||
children: [TransparentContent]
|
||
}
|
||
```
|
||
|
||
**Delete** (**[Parent][dfn-parent]**) represents contents that are no longer
|
||
accurate or no longer relevant.
|
||
|
||
**Delete** can be used where **[phrasing][dfn-phrasing-content]**
|
||
content is expected.
|
||
Its content model is **[transparent][dfn-transparent-content]** content.
|
||
|
||
For example, the following markdown:
|
||
|
||
```markdown
|
||
~~alpha~~
|
||
```
|
||
|
||
Yields:
|
||
|
||
```js
|
||
{
|
||
type: 'delete',
|
||
children: [{type: 'text', value: 'alpha'}]
|
||
}
|
||
```
|
||
|
||
### Content model
|
||
|
||
#### `PhrasingContent` (GFM strikethrough)
|
||
|
||
```idl
|
||
type PhrasingContentGfm = Delete | PhrasingContent
|
||
```
|
||
|
||
## Types
|
||
|
||
This package is fully typed with [TypeScript][].
|
||
It does not export additional types.
|
||
|
||
The `Delete` type of the mdast node 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-strikethrough@^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-gfm]
|
||
— remark plugin to support GFM
|
||
* [`syntax-tree/mdast-util-gfm`][mdast-util-gfm]
|
||
— same but all of GFM (autolink literals, footnotes, strikethrough, tables,
|
||
tasklists)
|
||
* [`micromark/micromark-extension-gfm-strikethrough`][extension]
|
||
— micromark extension to parse GFM strikethrough
|
||
|
||
## Contribute
|
||
|
||
See [`contributing.md`][contributing] in [`syntax-tree/.github`][health] for
|
||
ways to get started.
|
||
See [`support.md`][support] for ways to get help.
|
||
|
||
This project has a [code of conduct][coc].
|
||
By interacting with this repository, organization, or community you agree to
|
||
abide by its terms.
|
||
|
||
## License
|
||
|
||
[MIT][license] © [Titus Wormer][author]
|
||
|
||
<!-- Definitions -->
|
||
|
||
[build-badge]: https://github.com/syntax-tree/mdast-util-gfm-strikethrough/workflows/main/badge.svg
|
||
|
||
[build]: https://github.com/syntax-tree/mdast-util-gfm-strikethrough/actions
|
||
|
||
[coverage-badge]: https://img.shields.io/codecov/c/github/syntax-tree/mdast-util-gfm-strikethrough.svg
|
||
|
||
[coverage]: https://codecov.io/github/syntax-tree/mdast-util-gfm-strikethrough
|
||
|
||
[downloads-badge]: https://img.shields.io/npm/dm/mdast-util-gfm-strikethrough.svg
|
||
|
||
[downloads]: https://www.npmjs.com/package/mdast-util-gfm-strikethrough
|
||
|
||
[size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size&query=$.size.compressedSize&url=https://deno.bundlejs.com/?q=mdast-util-gfm-strikethrough
|
||
|
||
[size]: https://bundlejs.com/?q=mdast-util-gfm-strikethrough
|
||
|
||
[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg
|
||
|
||
[backers-badge]: https://opencollective.com/unified/backers/badge.svg
|
||
|
||
[collective]: https://opencollective.com/unified
|
||
|
||
[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg
|
||
|
||
[chat]: https://github.com/syntax-tree/unist/discussions
|
||
|
||
[npm]: https://docs.npmjs.com/cli/install
|
||
|
||
[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
|
||
|
||
[esmsh]: https://esm.sh
|
||
|
||
[typescript]: https://www.typescriptlang.org
|
||
|
||
[license]: license
|
||
|
||
[author]: https://wooorm.com
|
||
|
||
[health]: https://github.com/syntax-tree/.github
|
||
|
||
[contributing]: https://github.com/syntax-tree/.github/blob/main/contributing.md
|
||
|
||
[support]: https://github.com/syntax-tree/.github/blob/main/support.md
|
||
|
||
[coc]: https://github.com/syntax-tree/.github/blob/main/code-of-conduct.md
|
||
|
||
[gfm]: https://github.github.com/gfm/
|
||
|
||
[remark-gfm]: https://github.com/remarkjs/remark-gfm
|
||
|
||
[mdast]: https://github.com/syntax-tree/mdast
|
||
|
||
[dfn-transparent-content]: https://github.com/syntax-tree/mdast#transparentcontent
|
||
|
||
[mdast-util-from-markdown]: https://github.com/syntax-tree/mdast-util-from-markdown
|
||
|
||
[from-markdown-extension]: https://github.com/syntax-tree/mdast-util-from-markdown#extension
|
||
|
||
[mdast-util-to-markdown]: https://github.com/syntax-tree/mdast-util-to-markdown
|
||
|
||
[to-markdown-extension]: https://github.com/syntax-tree/mdast-util-to-markdown#options
|
||
|
||
[mdast-util-gfm]: https://github.com/syntax-tree/mdast-util-gfm
|
||
|
||
[mdast-util-to-hast]: https://github.com/syntax-tree/mdast-util-to-hast
|
||
|
||
[micromark]: https://github.com/micromark/micromark
|
||
|
||
[extension]: https://github.com/micromark/micromark-extension-gfm-strikethrough
|
||
|
||
[syntax]: https://github.com/micromark/micromark-extension-gfm-strikethrough#syntax
|
||
|
||
[dfn-parent]: https://github.com/syntax-tree/mdast#parent
|
||
|
||
[dfn-phrasing-content]: #phrasingcontent-gfm-strikethrough
|
||
|
||
[api-gfm-strikethrough-from-markdown]: #gfmstrikethroughfrommarkdown
|
||
|
||
[api-gfm-strikethrough-to-markdown]: #gfmstrikethroughtomarkdown
|