Remark-lint-rule-style NPM

remark-lint-rule-style

remark-lint rule to warn when thematic breaks (horizontal rules) are inconsistent.

What is this?

This package checks markers and whitespace of thematic rules.

When should I use this?

You can use this package to check that thematic breaks are consistent.

Presets

This plugin is included in the following presets:

Preset	Options
`remark-preset-lint-consistent`	`'consistent'`
`remark-preset-lint-markdown-style-guide`	`'---'`

Install

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

npm install remark-lint-rule-style

In Deno with esm.sh:

import remarkLintRuleStyle from 'https://esm.sh/remark-lint-rule-style@4'

In browsers with esm.sh:

<script type="module">
  import remarkLintRuleStyle from 'https://esm.sh/remark-lint-rule-style@4?bundle'
</script>

Use

On the API:

import remarkLint from 'remark-lint'
import remarkLintRuleStyle from 'remark-lint-rule-style'
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(remarkLintRuleStyle)
  .use(remarkStringify)
  .process(file)

console.error(reporter(file))

On the CLI:

remark --frail --use remark-lint --use remark-lint-rule-style .

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

 …
 "remarkConfig": {
   "plugins": [
     …
     "remark-lint",
+    "remark-lint-rule-style",
     …
   ]
 }
 …

API

This package exports no identifiers. It exports the TypeScript type Options. The default export is remarkLintRuleStyle.

`unified().use(remarkLintRuleStyle[, options])`

Warn when thematic breaks (horizontal rules) are inconsistent.

Parameters

options (Options, default: 'consistent') — preferred style or whether to detect the first style and warn for further differences

Returns

Transform (Transformer from unified).

`Options`

Configuration (TypeScript type).

'consistent' — detect the first used style and warn when further rules differ
string (example: '** * **', '___') — thematic break to prefer

Type

type Options = string | 'consistent'

Recommendation

Rules consist of a *, -, or _ character, which occurs at least three times with nothing else except for arbitrary spaces or tabs on a single line. Using spaces, tabs, or more than three markers is unnecessary work to type out. As asterisks can be used as a marker for more markdown constructs, it’s recommended to use that for rules (and lists, emphasis, strong) too. So it’s recommended to pass '***'.

Fix

remark-stringify formats rules with *** by default. There are three settings to control rules:

rule (default: '*') — marker
ruleRepetition (default: 3) — repetitions
ruleSpaces (default: false) — use spaces between markers

Examples

`ok.md`

In

Two rules:

* * *

* * *

Out

No messages.

`ok.md`

When configured with '_______'.

In

_______

_______

Out

No messages.

`not-ok.md`

In

***

* * *

Out

3:1-3:6: Unexpected thematic rule `* * *`, expected `***`

`not-ok.md`

When configured with '🌍'.

Out

1:1: Unexpected value `🌍` for `options`, expected thematic rule or `'consistent'`

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-rule-style@4, compatible with Node.js 16.