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remark-lint-first-heading-level
Advanced tools
remark-lint rule to warn when the first heading has a level other than a specified value
remark-lint
rule to warn when the first heading has an unexpected rank.
This package checks the rank of the first heading.
You can use this package to check that the rank of first headings is consistent.
This plugin is not included in presets maintained here.
This package is ESM only. In Node.js (version 16+), install with npm:
npm install remark-lint-first-heading-level
In Deno with esm.sh
:
import remarkLintFirstHeadingLevel from 'https://esm.sh/remark-lint-first-heading-level@4'
In browsers with esm.sh
:
<script type="module">
import remarkLintFirstHeadingLevel from 'https://esm.sh/remark-lint-first-heading-level@4?bundle'
</script>
On the API:
import remarkLint from 'remark-lint'
import remarkLintFirstHeadingLevel from 'remark-lint-first-heading-level'
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(remarkLintFirstHeadingLevel)
.use(remarkStringify)
.process(file)
console.error(reporter(file))
On the CLI:
remark --frail --use remark-lint --use remark-lint-first-heading-level .
On the CLI in a config file (here a package.json
):
…
"remarkConfig": {
"plugins": [
…
"remark-lint",
+ "remark-lint-first-heading-level",
…
]
}
…
This package exports no identifiers.
It exports the TypeScript type
Options
.
The default export is
remarkLintFirstHeadingLevel
.
unified().use(remarkLintFirstHeadingLevel[, options])
Warn when the first heading has an unexpected rank.
options
(Options
, default: 1
)
— configurationTransform (Transformer
from unified
).
Options
Configuration (TypeScript type).
type Options = 1 | 2 | 3 | 4 | 5 | 6
In most cases you’d want to first heading in a markdown document to start at
rank 1
.
In some cases a different rank makes more sense,
such as when building a blog and generating the primary heading from
frontmatter metadata,
in which case a value of 2
can be defined here or the rule can be turned
off.
ok.md
# Mercury
No messages.
ok-delay.md
Mercury.
# Venus
No messages.
not-ok.md
## Mercury
Venus.
1:1-1:11: Unexpected first heading rank `2`, expected rank `1`
ok.md
When configured with 2
.
## Mercury
Venus.
No messages.
ok-html.md
<div>Mercury.</div>
<h1>Venus</h1>
No messages.
ok-mdx.mdx
👉 Note: this example uses MDX (
remark-mdx
).
<div>Mercury.</div>
<h1>Venus</h1>
No messages.
not-ok-options.md
When configured with '🌍'
.
1:1: Unexpected value `🌍` for `options`, expected `1`, `2`, `3`, `4`, `5`, or `6`
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-first-heading-level@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.
FAQs
remark-lint rule to warn when the first heading has a level other than a specified value
The npm package remark-lint-first-heading-level receives a total of 12,670 weekly downloads. As such, remark-lint-first-heading-level popularity was classified as popular.
We found that remark-lint-first-heading-level demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 3 open source maintainers collaborating on the project.
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