remark-lint
rule to warn when headings are too long.
- What is this?
- When should I use this?
- Presets
- Install
- Use
- API
- Recommendation
- Examples
- Compatibility
- Contribute
- License
This package checks the length of heading text.
You can use this package to check that heading text is within reason.
This plugin is included in the following presets:
Preset | Options |
---|---|
remark-preset-lint-markdown-style-guide |
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@4'
In browsers with esm.sh
:
<script type="module">
import remarkLintMaximumHeadingLength from 'https://esm.sh/remark-lint-maximum-heading-length@4?bundle'
</script>
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",
…
]
}
…
This package exports no identifiers.
It exports no additional TypeScript types.
The default export is
remarkLintMaximumHeadingLength
.
Warn when headings are too long.
-
options
(number
, default:60
) — preferred max size
Transform (Transformer
from unified
).
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).
# Mercury is the first planet from the Sun
No messages.
When configured with 30
.
# Mercury is the first planet from the Sun
1:1-1:43: Unexpected `40` characters in heading, expected at most `30` characters
When configured with 30
.
👉 Note: this example uses MDX (
remark-mdx
).
<h1>Mercury is the first planet from the Sun</h1>
1:1-1:50: Unexpected `40` characters in heading, expected at most `30` characters
When configured with '🌍'
.
1:1: Unexpected value `🌍` for `options`, expected `number`
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@4
,
compatible with Node.js 16.
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.