remark-lint-rule-style

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

Contents

• What is this?
• When should I use this?
• Presets
• Install
• Use
• API
  • unified().use(remarkLintRuleStyle[, options])
  • Options
• Recommendation
• Fix
• Examples
• Compatibility
• Contribute
• License

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:

1npm install remark-lint-rule-style

In Deno with esm.sh:

1import remarkLintRuleStyle from 'https://esm.sh/remark-lint-rule-style@4'

In browsers with esm.sh:

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

Use

On the API:

1import remarkLint from 'remark-lint'
2import remarkLintRuleStyle from 'remark-lint-rule-style'
3import remarkParse from 'remark-parse'
4import remarkStringify from 'remark-stringify'
5import {read} from 'to-vfile'
6import {unified} from 'unified'
7import {reporter} from 'vfile-reporter'
8
9const file = await read('example.md')
10
11await unified()
12  .use(remarkParse)
13  .use(remarkLint)
14  .use(remarkLintRuleStyle)
15  .use(remarkStringify)
16  .process(file)
17
18console.error(reporter(file))

On the CLI:

1remark --frail --use remark-lint --use remark-lint-rule-style .

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

1 …
2 "remarkConfig": {
3   "plugins": [
4     …
5     "remark-lint",
6+    "remark-lint-rule-style",
7     …
8   ]
9 }
10 …

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

1type 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

1Two rules:
2
3* * *
4
5* * *

Out

No messages.

ok.md

When configured with '_______'.

In

1_______
2
3_______

Out

No messages.

not-ok.md

In

1***
2
3* * *

Out

13:1-3:6: Unexpected thematic rule `* * *`, expected `***`

not-ok.md

When configured with '🌍'.

Out

11:1: 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.

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