remark-lint-code-block-style

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[remark-lint][github-remark-lint] rule to warn when code blocks violate a given style.

Contents

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

What is this?

This package checks the style of code blocks.

When should I use this?

You can use this package to check that the style of code blocks is
consistent.

Presets

This plugin is included in the following presets:

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

Install

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

``sh
npm install remark-lint-code-block-style
`

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

`js
import remarkLintCodeBlockStyle from 'https://esm.sh/remark-lint-code-block-style@4'
`

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

`html

`

Use

On the API:

`js
import remarkLint from 'remark-lint'
import remarkLintCodeBlockStyle from 'remark-lint-code-block-style'
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(remarkLintCodeBlockStyle)
.use(remarkStringify)
.process(file)

console.error(reporter(file))
`

On the CLI:

`sh
remark --frail --use remark-lint --use remark-lint-code-block-style .
`

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

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

API

This package exports no identifiers.
It exports the [TypeScript][typescript] types
[Options][api-options] and
[Style][api-style].
The default export is
[remarkLintCodeBlockStyle][api-remark-lint-code-block-style].

$3

Warn when code blocks violate a given style.

###### 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

Configuration (TypeScript type).

###### Type

`ts
type Options = Style | 'consistent'
`

$3

Style (TypeScript type).

###### Type

`ts
type Style = 'indented' | 'fenced'
`

Recommendation

Indentation in markdown is complex as lists and indented code interfere in
unexpected ways.
Fenced code has more features than indented code: it can specify a
programming language.
Since CommonMark took the idea of fenced code from GFM,
fenced code became widely supported.
Due to this, it’s recommended to configure this rule with 'fenced'.

Fix

[remark-stringify][github-remark-stringify] always formats code blocks as
fenced.
Pass fences: false to only use fenced code blocks when they have a
language and as indented code otherwise.

Examples

##### ok-indented.md

When configured with 'indented'.

###### In

`markdown
venus()

Mercury.

earth()
`

###### Out

No messages.

##### ok-fenced.md

When configured with 'fenced'.

###### In

``markdown
`
venus()
`

Mercury.

`
earth()
`
``

###### Out

No messages.

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

###### In

``markdown
venus()

Mercury.

`
earth()
`
``

###### Out

`text
5:1-7:4: Unexpected fenced code block, expected indented code blocks
`

##### not-ok-indented.md

When configured with 'indented'.

###### In

``markdown
`
venus()
`

Mercury.

`
earth()
`
``

###### Out

`text
1:1-3:4: Unexpected fenced code block, expected indented code blocks
7:1-9:4: Unexpected fenced code block, expected indented code blocks
`

##### not-ok-fenced.md

When configured with 'fenced'.

###### In

`markdown
venus()

Mercury.

earth()
`

###### Out

`text
1:1-1:12: Unexpected indented code block, expected fenced code blocks
5:1-5:12: Unexpected indented code block, expected fenced code blocks
`

##### not-ok-options.md

When configured with '🌍'.

###### Out

`text
1:1: Unexpected value 🌍 for options, expected 'fenced', 'indented', 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-code-block-style@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-options]: #options

[api-remark-lint-code-block-style]: #unifieduseremarklintcodeblockstyle-options

[api-style]: #style

[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-code-block-style.svg

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

[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-code-block-style

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

[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