remark-lint-no-unneeded-full-reference-image

remark-lint rule to warn when unneeded full reference images are used.

Contents

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

What is this?

This package checks for unneeded full reference images.

When should I use this?

You can use this package to check that reference images are consistent.

Presets

This plugin is not included in presets maintained here.

Install

This package is ESM only. In Node.js (version 16+), install with npm:

npm install remark-lint-no-unneeded-full-reference-image

In Deno with esm.sh:

import remarkLintNoUnneededFullReferenceImage from 'https://esm.sh/remark-lint-no-unneeded-full-reference-image@4'

In browsers with esm.sh:

<script type="module">
  import remarkLintNoUnneededFullReferenceImage from 'https://esm.sh/remark-lint-no-unneeded-full-reference-image@4?bundle'
</script>

Use

On the API:

import remarkLint from 'remark-lint'
import remarkLintNoUnneededFullReferenceImage from 'remark-lint-no-unneeded-full-reference-image'
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(remarkLintNoUnneededFullReferenceImage)
  .use(remarkStringify)
  .process(file)

console.error(reporter(file))

On the CLI:

remark --frail --use remark-lint --use remark-lint-no-unneeded-full-reference-image .

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

 …
 "remarkConfig": {
   "plugins": [
     …
     "remark-lint",
+    "remark-lint-no-unneeded-full-reference-image",
     …
   ]
 }
 …

API

This package exports no identifiers. It exports no additional TypeScript types. The default export is remarkLintNoUnneededFullReferenceImage.

unified().use(remarkLintNoUnneededFullReferenceImage)

Warn when unneeded full reference images are used.

Parameters

There are no options.

Returns

Transform (Transformer from unified).

Recommendation

Full reference syntax (![Alt][alt]) is quite verbose compared to the concise collapsed reference syntax (![Alt][]).

Examples

ok.md

In

![Mercury][] and ![Venus][venus-image].

[mercury]: /mercury.png
[venus-image]: /venus.png

Out

No messages.

not-ok.md

In

![Mercury][mercury].

[mercury]: /mercury.png

Out

1:1-1:20: Unexpected full reference image (`![text][label]`) where the identifier can be inferred from the text, expected collapsed reference (`![text][]`)

escape.md

In

👉 Note: this example uses GFM (remark-gfm).

Matrix:

| Kind                      | Text normal | Text escape  | Text character reference |
| ------------------------- | ----------- | ------------ | ------------------------ |
| Label normal              | ![&][&]     | ![\&][&]     | ![&][&]              |
| Label escape              | ![&][\&]    | ![\&][\&]    | ![&][\&]             |
| Label character reference | ![&][&] | ![\&][&] | ![&][&]          |

When using the above matrix, the first row will go to `/a.png`, the second
to `b`, third to `c`.
Removing all labels, you’d instead get it per column: `/a.png`, `b`, `c`.
That shows the label is not needed when it matches the text, and is otherwise.

[&]: /a.png
[\&]: /b.png
[&]: /c.png

Out

5:31-5:38: Unexpected full reference image (`![text][label]`) where the identifier can be inferred from the text, expected collapsed reference (`![text][]`)
6:45-6:54: Unexpected full reference image (`![text][label]`) where the identifier can be inferred from the text, expected collapsed reference (`![text][]`)
7:60-7:75: Unexpected full reference image (`![text][label]`) where the identifier can be inferred from the text, expected collapsed reference (`![text][]`)

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-unneeded-full-reference-image@4, compatible with Node.js 16.

Contribute

See contributing.md in remarkjs/.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.

License

MIT © Titus Wormer