mdast-util-gfm-strikethrough
mdast extensions to parse and serialize GFM strikethrough.
Contents
What is this?
This package contains extensions that add support for the strikethrough syntax enabled by GFM to mdast-util-from-markdown
and mdast-util-to-markdown
.
When to use this
These tools are all rather low-level. In most cases, you’d want to use remark-gfm
with remark instead.
When you are working with syntax trees and want all of GFM, use mdast-util-gfm
instead.
When working with mdast-util-from-markdown
, you must combine this package with micromark-extension-gfm-strikethrough
.
This utility does not handle how markdown is turned to HTML. That’s done by mdast-util-to-hast
. If you want a different element, you should configure that utility.
Install
This package is ESM only. In Node.js (version 12.20+, 14.14+, or 16.0+), install with npm:
npm install mdast-util-gfm-strikethrough
In Deno with esm.sh
:
import {gfmStrikethroughFromMarkdown, gfmStrikethroughToMarkdown} from 'https://esm.sh/mdast-util-gfm-strikethrough@1'
In browsers with esm.sh
:
<script type="module">
import {gfmStrikethroughFromMarkdown, gfmStrikethroughToMarkdown} from 'https://esm.sh/mdast-util-gfm-strikethrough@1?bundle'
</script>
Use
Say our document example.md
contains:
*Emphasis*, **importance**, and ~~strikethrough~~.
…and our module example.js
looks as follows:
import fs from 'node:fs/promises'
import {fromMarkdown} from 'mdast-util-from-markdown'
import {toMarkdown} from 'mdast-util-to-markdown'
import {gfmStrikethrough} from 'micromark-extension-gfm-strikethrough'
import {gfmStrikethroughFromMarkdown, gfmStrikethroughToMarkdown} from 'mdast-util-gfm-strikethrough'
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:
{
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: '.'}
]
}
]
}
*Emphasis*, **importance**, and ~~strikethrough~~.
API
This package exports the identifiers gfmStrikethroughFromMarkdown
and gfmStrikethroughToMarkdown
. There is no default export.
gfmStrikethroughFromMarkdown
Extension for mdast-util-from-markdown
.
gfmStrikethroughToMarkdown
Extension for mdast-util-to-markdown
.
Syntax tree
The following interfaces are added to mdast by this utility.
Nodes
Delete
interface Delete <: Parent {
type: "delete"
children: [TransparentContent]
}
Delete (Parent) represents contents that are no longer accurate or no longer relevant.
Delete can be used where static phrasing content is expected. Its content model is transparent content.
For example, the following markdown:
~~alpha~~
Yields:
{
type: 'delete',
children: [{type: 'text', value: 'alpha'}]
}
Content model
StaticPhrasingContent
(GFM strikethrough)
type StaticPhrasingContentGfm = Delete | StaticPhrasingContent
Types
This package is fully typed with TypeScript. It does not export additional types.
The Delete
node type is supported in @types/mdast
by default.
Compatibility
Projects maintained by the unified collective are compatible with all maintained versions of Node.js. As of now, that is Node.js 12.20+, 14.14+, and 16.0+. Our projects sometimes work with older versions, but this is not guaranteed.
This plugin works with mdast-util-from-markdown
version 1+ and mdast-util-to-markdown
version 1+.
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-strikethrough
— micromark extension to parse GFM strikethrough
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.