# mdast-util-gfm-strikethrough

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Extension for [`mdast-util-from-markdown`][from-markdown] and/or
[`mdast-util-to-markdown`][to-markdown] to support GitHub flavored markdown
strikethrough (~~like this~~) in **[mdast][]**.
When parsing (`from-markdown`), must be combined with
[`micromark-extension-gfm-strikethrough`][extension].

You probably shouldn’t use this package directly, but instead use
[`remark-gfm`][remark-gfm] with **[remark][]**.

## Install

[npm][]:

```sh
npm install mdast-util-gfm-strikethrough
```

## Use

Say our script, `example.js`, looks as follows:

```js
var fromMarkdown = require('mdast-util-from-markdown')
var toMarkdown = require('mdast-util-to-markdown')
var syntax = require('micromark-extension-gfm-strikethrough')
var strikethrough = require('mdast-util-gfm-strikethrough')

var doc = '*Emphasis*, **importance**, and ~~strikethrough~~.'

var tree = fromMarkdown(doc, {
  extensions: [syntax()],
  mdastExtensions: [strikethrough.fromMarkdown]
})

console.log(tree)

var out = toMarkdown(tree, {extensions: [strikethrough.toMarkdown]})

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

### `strikethrough.fromMarkdown`

### `strikethrough.toMarkdown`

> Note: the separate extensions are also available at
> `mdast-util-gfm-strikethrough/from-markdown` and
> `mdast-util-gfm-strikethrough/to-markdown`.

Support strikethrough.
The exports are extensions, respectively
for [`mdast-util-from-markdown`][from-markdown] and
[`mdast-util-to-markdown`][to-markdown].

## Related

*   [`remarkjs/remark`][remark]
    — markdown processor powered by plugins
*   [`remarkjs/remark-gfm`][remark-gfm]
    — remark plugin to support GFM
*   [`micromark/micromark`][micromark]
    — the smallest commonmark-compliant markdown parser that exists
*   [`micromark/micromark-extension-gfm-strikethrough`][extension]
    — micromark extension to parse GFM strikethrough
*   [`syntax-tree/mdast-util-from-markdown`][from-markdown]
    — mdast parser using `micromark` to create mdast from markdown
*   [`syntax-tree/mdast-util-to-markdown`][to-markdown]
    — mdast serializer to create markdown from mdast

## Contribute

See [`contributing.md` in `syntax-tree/.github`][contributing] 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 -->

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[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg

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[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

[license]: license

[author]: https://wooorm.com

[contributing]: https://github.com/syntax-tree/.github/blob/HEAD/contributing.md

[support]: https://github.com/syntax-tree/.github/blob/HEAD/support.md

[coc]: https://github.com/syntax-tree/.github/blob/HEAD/code-of-conduct.md

[mdast]: https://github.com/syntax-tree/mdast

[remark]: https://github.com/remarkjs/remark

[remark-gfm]: https://github.com/remarkjs/remark-gfm

[from-markdown]: https://github.com/syntax-tree/mdast-util-from-markdown

[to-markdown]: https://github.com/syntax-tree/mdast-util-to-markdown

[micromark]: https://github.com/micromark/micromark

[extension]: https://github.com/micromark/micromark-extension-gfm-strikethrough