unified

Project: remarkjs/remark-lint

Package: remark-lint-maximum-line-length@3.1.2

  1. Dependents: 0
  2. remark-lint rule to warn when lines are too long
  1. remark 214
  2. lint 80
  3. rule 75
  4. remark-lint-rule 68
  5. line 3
  6. length 2

remark-lint-maximum-line-length

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remark-lint rule to warn when lines are too long.

Contents

What is this?

This package checks the length of lines.

When should I use this?

You can use this package to check that lines are within reason.

Presets

This plugin is included in the following presets:

PresetOptions
remark-preset-lint-markdown-style-guide80

Install

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

npm install remark-lint-maximum-line-length

In Deno with esm.sh:

import remarkLintMaximumLineLength from 'https://esm.sh/remark-lint-maximum-line-length@3'

In browsers with esm.sh:

<script type="module">
  import remarkLintMaximumLineLength from 'https://esm.sh/remark-lint-maximum-line-length@3?bundle'
</script>

Use

On the API:

import remarkLint from 'remark-lint'
import remarkLintMaximumLineLength from 'remark-lint-maximum-line-length'
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(remarkLintMaximumLineLength)
  .use(remarkStringify)
  .process(file)

console.error(reporter(file))

On the CLI:

remark --frail --use remark-lint --use remark-lint-maximum-line-length .

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

 …
 "remarkConfig": {
   "plugins": [
     …
     "remark-lint",
+    "remark-lint-maximum-line-length",
     …
   ]
 }
 …

API

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

unified().use(remarkLintMaximumLineLength[, options])

Warn when lines are too long.

Nodes that cannot be wrapped are ignored, such as JSX, HTML, code (flow), definitions, headings, and tables.

When code (phrasing), images, and links start before the wrap, end after the wrap, and contain no whitespace, they are also ignored.

Parameters
Returns

Transform (Transformer from unified).

Recommendation

Whether to wrap prose or not is a stylistic choice.

Examples

ok.md
In

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

This line is simply not toooooooooooooooooooooooooooooooooooooooooooo
long.

This is also fine: <http://this-long-url-with-a-long-domain.co.uk/a-long-path?query=variables>

<http://this-link-is-fine.com>

`alphaBravoCharlieDeltaEchoFoxtrotGolfHotelIndiaJuliettKiloLimaMikeNovemberOscarPapaQuebec.romeo()`

[foo](http://this-long-url-with-a-long-domain-is-ok.co.uk/a-long-path?query=variables)

<http://this-long-url-with-a-long-domain-is-ok.co.uk/a-long-path?query=variables>

![foo](http://this-long-url-with-a-long-domain-is-ok.co.uk/a-long-path?query=variables)

| An | exception | is | line | length | in | long | tables | because | those | can’t | just |
| -- | --------- | -- | ---- | ------ | -- | ---- | ------ | ------- | ----- | ----- | ---- |
| be | helped    |    |      |        |    |      |        |         |       |       | .    |

<a><b><i><p><q><s><u>alpha bravo charlie delta echo foxtrot golf</u></s></q></p></i></b></a>

The following is also fine (note the `.`), because there is no whitespace.

<http://this-long-url-with-a-long-domain-is-ok.co.uk/a-long-path?query=variables>.

In addition, definitions are also fine:

[foo]: <http://this-long-url-with-a-long-domain-is-ok.co.uk/a-long-path?query=variables>
Out

No messages.

not-ok.md

When configured with 80.

In
This line is simply not tooooooooooooooooooooooooooooooooooooooooooooooooooooooo
long.

Just like thiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiis one.

And this one is also very wrong: because the link starts aaaaaaafter the column: <http://line.com>

<http://this-long-url-with-a-long-domain-is-not-ok.co.uk/a-long-path?query=variables> and such.

And this one is also very wrong: because the code starts aaaaaaafter the column: `alpha.bravo()`

`alphaBravoCharlieDeltaEchoFoxtrotGolfHotelIndiaJuliettKiloLimaMikeNovemberOscar.papa()` and such.
Out
4:86: Line must be at most 80 characters
6:99: Line must be at most 80 characters
8:96: Line must be at most 80 characters
10:97: Line must be at most 80 characters
12:99: Line must be at most 80 characters
ok-mixed-line-endings.md

When configured with 10.

In
0123456789␍␊0123456789␊01234␍␊01234␊
Out

No messages.

not-ok-mixed-line-endings.md

When configured with 10.

In
012345678901␍␊012345678901␊01234567890␍␊01234567890␊
Out
1:13: Line must be at most 10 characters
2:13: Line must be at most 10 characters
3:12: Line must be at most 10 characters
4:12: Line must be at most 10 characters

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-maximum-line-length@3, compatible with Node.js 12.

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