remark-lint-maximum-line-length

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

Contents

• What is this?
• When should I use this?
• Presets
• Install
• Use
• API

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

• Recommendation
• Examples
• Compatibility
• Contribute
• License

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:
| Preset | Options | | - | - | | remark-preset-lint-markdown-style-guide | 80 |

Install

This package is ESM onlygithub-gist-esm. In Node.js (version 16+), install with npmnpm-install:

npm install remark-lint-maximum-line-length

In Deno with esm.shesm-sh:

import remarkLintMaximumLineLength from 'https://esm.sh/remark-lint-maximum-line-length@4'

In browsers with esm.shesm-sh:

<script type="module">
  import remarkLintMaximumLineLength from 'https://esm.sh/remark-lint-maximum-line-length@4?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 TypeScripttypescript types. The default export is remarkLintMaximumLineLengthapi-remark-lint-maximum-line-length.

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

• options (number, default: 80)

— preferred max size

Returns

Transform (Transformer from unifiedgithub-unified-transformer).

Recommendation

Whether to wrap prose or not is a stylistic choice.

Examples

ok.md

In

Mercury mercury mercury mercury mercury mercury mercury mercury mercury mercury
mercury.

Mercury mercury mercury mercury mercury mercury mercury mercury mercury `mercury()`.

Mercury mercury mercury mercury mercury mercury mercury mercury mercury <http://localhost>.

Mercury mercury mercury mercury mercury mercury mercury mercury mercury [mercury](http://localhost).

Mercury mercury mercury mercury mercury mercury mercury mercury mercury ![mercury](http://localhost).

<div>Mercury mercury mercury mercury mercury mercury mercury mercury mercury</div>

Out

No messages.

not-ok.md

When configured with 20.

In

Mercury mercury mercury
mercury.

Mercury mercury mercury `mercury()`.

Mercury mercury mercury <http://localhost>.

Mercury mercury mercury [m](example.com).

Mercury mercury mercury ![m](example.com).

`mercury()` mercury mercury mercury.

<http://localhost> mercury.

[m](example.com) mercury.

![m](example.com) mercury.

Mercury mercury ![m](example.com) mercury.

Out

1:24: Unexpected `23` character line, expected at most `20` characters, remove `3` characters
4:37: Unexpected `36` character line, expected at most `20` characters, remove `16` characters
6:44: Unexpected `43` character line, expected at most `20` characters, remove `23` characters
8:42: Unexpected `41` character line, expected at most `20` characters, remove `21` characters
10:43: Unexpected `42` character line, expected at most `20` characters, remove `22` characters
12:37: Unexpected `36` character line, expected at most `20` characters, remove `16` characters
14:28: Unexpected `27` character line, expected at most `20` characters, remove `7` characters
16:26: Unexpected `25` character line, expected at most `20` characters, remove `5` characters
18:27: Unexpected `26` character line, expected at most `20` characters, remove `6` characters
20:43: Unexpected `42` character line, expected at most `20` characters, remove `22` characters

long-autolinks-ok.md

When configured with 20.

In

<http://localhost/mercury/>

<http://localhost/mercury/>
mercury.

Mercury
<http://localhost/mercury/>.

Mercury
<http://localhost/mercury/>
mercury.

Mercury
<http://localhost/mercury/>
mercury mercury.

Mercury mercury
<http://localhost/mercury/>
mercury mercury.

Out

No messages.

long-autolinks-nok.md

When configured with 20.

In

<http://localhost/mercury/> mercury.

Mercury <http://localhost/mercury/>.

Mercury
<http://localhost/mercury/> mercury.

Mercury <http://localhost/mercury/>
mercury.

Out

1:37: Unexpected `36` character line, expected at most `20` characters, remove `16` characters
6:37: Unexpected `36` character line, expected at most `20` characters, remove `16` characters

ok.md

When configured with 20.

In

👉 Note: this example uses frontmatter (remark-frontmattergithub-remark-frontmatter).

```markdown

description: Mercury mercury mercury mercury.

###### Out

No messages.

##### `ok.md`

When configured with `20`.

###### In

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

```markdown
| Mercury | Mercury | Mercury |
| ------- | ------- | ------- |

Out

No messages.

ok.md

When configured with 20.

In

👉 Note: this example uses math (remark-mathgithub-remark-math).

$$
L = \frac{1}{2} \rho v^2 S C_L
$$

Out

No messages.

ok.md

When configured with 20.

In

👉 Note: this example uses MDX (remark-mdxgithub-remark-mdx).

export const description = 'Mercury mercury mercury mercury.'

{description}

Out

No messages.

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: Unexpected `12` character line, expected at most `10` characters, remove `2` characters
2:13: Unexpected `12` character line, expected at most `10` characters, remove `2` characters
3:12: Unexpected `11` character line, expected at most `10` characters, remove `1` character
4:12: Unexpected `11` character line, expected at most `10` characters, remove `1` character

not-ok.md

When configured with '🌍'.

Out

1:1: Unexpected value `🌍` for `options`, expected `number`

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@4, compatible with Node.js 16.

Contribute

See contributing.mdgithub-dotfiles-contributing in remarkjs/.githubgithub-dotfiles-health for ways to get started. See support.mdgithub-dotfiles-support for ways to get help.
This project has a code of conductgithub-dotfiles-coc. By interacting with this repository, organization, or community you agree to abide by its terms.

License

MITfile-license © Titus Wormerauthor