unified

Project: remarkjs/remark-lint

Package: remark-lint-maximum-heading-length@3.1.1

  1. Dependents: 0
  2. remark-lint rule to warn when headings are too long
  1. remark 214
  2. lint 80
  3. rule 75
  4. remark-lint-rule 68
  5. heading 26
  6. length 2

remark-lint-maximum-heading-length

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

Contents

What is this?

This package checks the length of heading text.

When should I use this?

You can use this package to check that heading text is within reason.

Presets

This plugin is included in the following presets:

PresetOptions
remark-preset-lint-markdown-style-guide

Install

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

npm install remark-lint-maximum-heading-length

In Deno with esm.sh:

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

In browsers with esm.sh:

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

Use

On the API:

import remarkLint from 'remark-lint'
import remarkLintMaximumHeadingLength from 'remark-lint-maximum-heading-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(remarkLintMaximumHeadingLength)
  .use(remarkStringify)
  .process(file)

console.error(reporter(file))

On the CLI:

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

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

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

API

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

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

Warn when headings are too long.

Parameters
Returns

Transform (Transformer from unified).

Recommendation

While this rule is sometimes annoying, reasonable size headings do help SEO purposes (bots prefer reasonable headings), visual users (headings are typically displayed quite large), and users of screen readers (who use “jump to heading” features that read every heading out loud to navigate within a page).

Examples

ok.md
In
# Alpha bravo charlie delta echo foxtrot golf hotel

# ![Alpha bravo charlie delta echo foxtrot golf hotel](http://example.com/nato.png)
Out

No messages.

not-ok.md

When configured with 40.

In
# Alpha bravo charlie delta echo foxtrot golf hotel
Out
1:1-1:52: Use headings shorter than `40`

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-heading-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