remark-lint-no-heading-punctuation

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[remark-lint][github-remark-lint] rule to warn when headings end in irregular characters.

Contents

* What is this?
* When should I use this?
* Presets
* Install
* Use
* API
* [unified().use(remarkLintNoHeadingPunctuation[, options])](#unifieduseremarklintnoheadingpunctuation-options)
* Examples
* Compatibility
* Contribute
* License

What is this?

This package checks heading text.

When should I use this?

You can use this package to check that heading text is consistent.

Presets

This plugin is included in the following presets:

| Preset | Options |
| - | - |
| 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-no-heading-punctuation
`

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

`js
import remarkLintNoHeadingPunctuation from 'https://esm.sh/remark-lint-no-heading-punctuation@4'
`

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

`html

`

Use

On the API:

`js
import remarkLint from 'remark-lint'
import remarkLintNoHeadingPunctuation from 'remark-lint-no-heading-punctuation'
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(remarkLintNoHeadingPunctuation)
.use(remarkStringify)
.process(file)

console.error(reporter(file))
`

On the CLI:

`sh
remark --frail --use remark-lint --use remark-lint-no-heading-punctuation .
`

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

`diff
…
"remarkConfig": {
"plugins": [
…
"remark-lint",
+ "remark-lint-no-heading-punctuation",
…
]
}
…
`

API

This package exports no identifiers.
It exports no additional [TypeScript][typescript] types.
The default export is
[remarkLintNoHeadingPunctuation][api-remark-lint-no-heading-punctuation].

$3

Warn when headings end in irregular characters.

###### Parameters

* options (RegExp or string, default: /[!,.:;?]/u)
— configuration,
when string wrapped in new RegExp('[' + x + ']', 'u') so make sure to
escape regexp characters

###### Returns

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

Examples

##### ok.md

###### In

`markdown


Mercury


`

###### Out

No messages.

##### not-ok.md

###### In

`markdown


Mercury:

Venus?

Earth!

Mars,

Jupiter;


`

###### Out

`text
1:1-1:11: Unexpected character : at end of heading, remove it
3:1-3:9: Unexpected character ? at end of heading, remove it
5:1-5:9: Unexpected character ! at end of heading, remove it
7:1-7:8: Unexpected character , at end of heading, remove it
9:1-9:11: Unexpected character ; at end of heading, remove it
`

##### ok.md

When configured with ',;:!?'.

###### In

`markdown


Mercury…


`

###### Out

No messages.

##### regex.md

When configured with { source: '[^A-Za-z0-9]' }.

###### In

`markdown


Mercury!


`

###### Out

`text
1:1-1:11: Unexpected character ! at end of heading, remove it
`

##### example.mdx

###### In

> 👉 Note: this example uses
> MDX ([remark-mdx][github-remark-mdx]).

`mdx


Mercury?


`

###### Out

`text
1:1-1:18: Unexpected character ? at end of heading, remove it
`

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

When configured with 1.

###### Out

`text
1:1: Unexpected value 1 for options, expected RegExp or string
`

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-no-heading-punctuation@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-remark-lint-no-heading-punctuation]: #unifieduseremarklintnoheadingpunctuation-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-no-heading-punctuation.svg

[badge-downloads-url]: https://www.npmjs.com/package/remark-lint-no-heading-punctuation

[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-no-heading-punctuation

[badge-size-url]: https://bundlejs.com/?q=remark-lint-no-heading-punctuation

[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-mdx]: https://mdxjs.com/packages/remark-mdx/

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

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

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