remark-lint-no-unused-definitions

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[remark-lint][github-remark-lint] rule to warn when unreferenced definitions are used.

Contents

* What is this?
* When should I use this?
* Presets
* Install
* Use
* API
* unified().use(remarkLintNoUnusedDefinitions)
* Recommendation
* Examples
* Compatibility
* Contribute
* License

What is this?

This package checks that definitions are referenced.

When should I use this?

You can use this package to check definitions.

Presets

This plugin is included in the following presets:

| Preset | Options |
| - | - |
| remark-preset-lint-recommended | |

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-unused-definitions
`

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

`js
import remarkLintNoUnusedDefinitions from 'https://esm.sh/remark-lint-no-unused-definitions@4'
`

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

`html

`

Use

On the API:

`js
import remarkLint from 'remark-lint'
import remarkLintNoUnusedDefinitions from 'remark-lint-no-unused-definitions'
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(remarkLintNoUnusedDefinitions)
.use(remarkStringify)
.process(file)

console.error(reporter(file))
`

On the CLI:

`sh
remark --frail --use remark-lint --use remark-lint-no-unused-definitions .
`

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

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

API

This package exports no identifiers.
It exports no additional [TypeScript][typescript] types.
The default export is
[remarkLintNoUnusedDefinitions][api-remark-lint-no-unused-definitions].

$3

Warn when unreferenced definitions are used.

###### Parameters

There are no options.

###### Returns

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

Recommendation

Unused definitions do not contribute anything, so they can be removed.

Examples

##### ok.md

###### In

`markdown
[Mercury][]

[mercury]: https://example.com/mercury/
`

###### Out

No messages.

##### not-ok.md

###### In

`markdown
[mercury]: https://example.com/mercury/
`

###### Out

`text
1:1-1:40: Unexpected unused definition, expected no definition or one or more references to mercury
`

##### gfm.md

###### In

> 👉 Note: this example uses
> GFM ([remark-gfm][github-remark-gfm]).

`markdown
Mercury[^mercury] is a planet.

[^Mercury]:
Mercury is the first planet from the Sun and the smallest
in the Solar System.
[^Venus]:
Venus is the second planet from
the Sun.
`

###### Out

`text
6:1-8:13: Unexpected unused footnote definition, expected no definition or one or more footnote references to venus
`

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-unused-definitions@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-unused-definitions]: #unifieduseremarklintnounuseddefinitions

[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-unused-definitions.svg

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

[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-unused-definitions

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

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

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

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

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

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