remark-lint-fenced-code-marker

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[remark-lint][github-remark-lint] rule to warn when fenced code markers are
inconsistent.

Contents

* What is this?
* When should I use this?
* Presets
* Install
* Use
* API
* [unified().use(remarkLintFencedCodeMarker[, options])](#unifieduseremarklintfencedcodemarker-options)
* Marker
* Options
* Recommendation
* Fix
* Examples
* Compatibility
* Contribute
* License

What is this?

This package checks fenced code block markers.

When should I use this?

You can use this package to check that fenced code block markers are
consistent.

Presets

This plugin is included in the following presets:

| Preset | Options |
| - | - |
| remark-preset-lint-consistent | 'consistent' |
| remark-preset-lint-markdown-style-guide | `''` |

Install

This package is [ESM only][github-gist-esm].
In Node.js (version 16+),
install with [npm][npm-install]:

`sh
npm install remark-lint-fenced-code-marker
`

In Deno with [esm.sh][esm-sh]:

`js
import remarkLintFencedCodeMarker from 'https://esm.sh/remark-lint-fenced-code-marker@4'
`

In browsers with [esm.sh][esm-sh]:

`html

`

Use

On the API:

`js
import remarkLint from 'remark-lint'
import remarkLintFencedCodeMarker from 'remark-lint-fenced-code-marker'
import remarkParse from 'remark-parse'
import remarkStringify from 'remark-stringify'
import {read} from 'to-vfile'
import {unified} from 'unified'
import {reporter} from 'vfile-reporter'

const file = await read('example.md')

await unified()
.use(remarkParse)
.use(remarkLint)
.use(remarkLintFencedCodeMarker)
.use(remarkStringify)
.process(file)

console.error(reporter(file))
`

On the CLI:

`sh
remark --frail --use remark-lint --use remark-lint-fenced-code-marker .
`

On the CLI in a config file (here a package.json):

`diff
…
"remarkConfig": {
"plugins": [
…
"remark-lint",
+ "remark-lint-fenced-code-marker",
…
]
}
…
`

API

This package exports no identifiers.
It exports the [TypeScript][typescript] types
[Marker][api-marker] and
[Options][api-options].
The default export is
[remarkLintFencedCodeMarker][api-remark-lint-fenced-code-marker].

$3

Warn when fenced code markers are inconsistent.

###### Parameters

* options ([Options][api-options], default: 'consistent')
— preferred style or whether to detect the first style and warn for
further differences

###### Returns

Transform ([Transformer from unified][github-unified-transformer]).

$3

Marker (TypeScript type).

###### Type

`ts
type Marker = '' | '~'
``

$3

Configuration (TypeScript type).

###### Type

`ts
type Options = Marker | 'consistent'
`

Recommendation

Tildes are uncommon.
So it’s recommended to configure this rule with ''`.

Fix

[remark-stringify][github-remark-stringify] formats fenced code with grave
accents by default.
Pass fence: '~' to always use tildes.

Examples

##### ok-indented.md

###### In

`markdown
Indented code blocks are not affected by this rule:

mercury()
`

###### Out

No messages.

##### ok-tick.md

When configured with ''`.

###### In

``markdown
`javascript
mercury()
`

`
venus()
`
``

###### Out

No messages.

##### ok-tilde.md

When configured with '~'.

###### In

`markdown
~~~javascript
mercury()
~~~

~~~
venus()
~~~
`

###### Out

No messages.

##### not-ok-consistent-tick.md

###### In

``markdown
`javascript
mercury()
`

~~~
venus()
~~~
``

###### Out

`text
5:1-7:4: Unexpected fenced code marker ~, expected `
`

##### not-ok-consistent-tilde.md

###### In

``markdown
~~~javascript
mercury()
~~~

`
venus()
`
``

###### Out

`text
5:1-7:4: Unexpected fenced code marker `, expected ~
`

##### not-ok-incorrect.md

When configured with '🌍'.

###### Out

`text
1:1: Unexpected value 🌍 for options, expected ''`, '~', or 'consistent'
`

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,
remark-lint-fenced-code-marker@4,
compatible with Node.js 16.

Contribute

See [contributing.md][github-dotfiles-contributing] in [remarkjs/.github][github-dotfiles-health] for ways
to get started.
See [support.md`][github-dotfiles-support] for ways to get help.

This project has a [code of conduct][github-dotfiles-coc].
By interacting with this repository, organization, or community you agree to
abide by its terms.

License

[MIT][file-license] © [Titus Wormer][author]

[api-marker]: #marker

[api-options]: #options

[api-remark-lint-fenced-code-marker]: #unifieduseremarklintfencedcodemarker-options

[author]: https://wooorm.com

[badge-build-image]: https://github.com/remarkjs/remark-lint/workflows/main/badge.svg

[badge-build-url]: https://github.com/remarkjs/remark-lint/actions

[badge-chat-image]: https://img.shields.io/badge/chat-discussions-success.svg

[badge-chat-url]: https://github.com/remarkjs/remark/discussions

[badge-coverage-image]: https://img.shields.io/codecov/c/github/remarkjs/remark-lint.svg

[badge-coverage-url]: https://codecov.io/github/remarkjs/remark-lint

[badge-downloads-image]: https://img.shields.io/npm/dm/remark-lint-fenced-code-marker.svg

[badge-downloads-url]: https://www.npmjs.com/package/remark-lint-fenced-code-marker

[badge-funding-backers-image]: https://opencollective.com/unified/backers/badge.svg

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

[badge-funding-url]: https://opencollective.com/unified

[badge-size-image]: https://img.shields.io/bundlejs/size/remark-lint-fenced-code-marker

[badge-size-url]: https://bundlejs.com/?q=remark-lint-fenced-code-marker

[esm-sh]: https://esm.sh

[file-license]: https://github.com/remarkjs/remark-lint/blob/main/license

[github-dotfiles-coc]: https://github.com/remarkjs/.github/blob/main/code-of-conduct.md

[github-dotfiles-contributing]: https://github.com/remarkjs/.github/blob/main/contributing.md

[github-dotfiles-health]: https://github.com/remarkjs/.github

[github-dotfiles-support]: https://github.com/remarkjs/.github/blob/main/support.md

[github-gist-esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c

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

[github-remark-stringify]: https://github.com/remarkjs/remark/tree/main/packages/remark-stringify

[github-unified-transformer]: https://github.com/unifiedjs/unified#transformer

[npm-install]: https://docs.npmjs.com/cli/install

[typescript]: https://www.typescriptlang.org