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remark-lint-list-item-spacing

v5.0.0

Published

remark-lint rule to warn when list looseness is incorrect

Downloads

355,584

Readme

remark-lint-list-item-spacing

Build Coverage Downloads Size Sponsors Backers Chat

remark-lint rule to warn when lists violate a given style.

Contents

What is this?

This package checks blank lines between list items.

When should I use this?

You can use this package to check the style of lists.

Presets

This plugin is included in the following presets:

| Preset | Options | | - | - | | remark-preset-lint-markdown-style-guide | |

Install

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

npm install remark-lint-list-item-spacing

In Deno with esm.sh:

import remarkLintListItemSpacing from 'https://esm.sh/remark-lint-list-item-spacing@5'

In browsers with esm.sh:

<script type="module">
  import remarkLintListItemSpacing from 'https://esm.sh/remark-lint-list-item-spacing@5?bundle'
</script>

Use

On the API:

import remarkLint from 'remark-lint'
import remarkLintListItemSpacing from 'remark-lint-list-item-spacing'
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(remarkLintListItemSpacing)
  .use(remarkStringify)
  .process(file)

console.error(reporter(file))

On the CLI:

remark --frail --use remark-lint --use remark-lint-list-item-spacing .

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

 …
 "remarkConfig": {
   "plugins": [
     …
     "remark-lint",
+    "remark-lint-list-item-spacing",
     …
   ]
 }
 …

API

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

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

Warn when lists violate a given style.

Parameters
  • options (Options, optional) — configuration
Returns

Transform (Transformer from unified).

Options

Configuration (TypeScript type).

Fields
  • checkBlanks (boolean, default: false) — expect blank lines between items based on whether an item has blank lines in them; the default is to expect blank lines based on whether items span multiple lines

Recommendation

First some background. Regardless of ordered and unordered, there are two kinds of lists in markdown, tight and loose. Lists are tight by default but if there is a blank line between two list items or between two blocks inside an item, that turns the whole list into a loose list. When turning markdown into HTML, paragraphs in tight lists are not wrapped in <p> tags.

This rule defaults to the markdown-style-guide preference for which lists should be loose or not: loose when at least one item spans more than one line and tight otherwise. With {checkBlanks: true}, this rule follows whether a list is loose or not according to Commonmark, and when one item is loose, all items must be loose.

Examples

ok.md
In
* Mercury.
* Venus.

+   Mercury and
    Venus.

+   Earth.
Out

No messages.

ok-check-blanks.md

When configured with { checkBlanks: true }.

In
* Mercury.
* Venus.

+   Mercury

    Mercury is the first planet from the Sun and the smallest in the Solar
    System.

+   Earth.
Out

No messages.

not-ok.md
In
* Mercury.

* Venus.

+   Mercury and
    Venus.
+   Earth.

*   Mercury.

    Mercury is the first planet from the Sun and the smallest in the Solar
    System.
*   Earth.
Out
1:11-3:1: Unexpected `1` blank line between list items, expected `0` blank lines, remove `1` blank line
6:11-7:1: Unexpected `0` blank lines between list items, expected `1` blank line, add `1` blank line
12:12-13:1: Unexpected `0` blank lines between list items, expected `1` blank line, add `1` blank line
not-ok-blank.md

When configured with { checkBlanks: true }.

In
* Mercury.

* Venus.

+   Mercury and
    Venus.

+   Earth.

*   Mercury.

    Mercury is the first planet from the Sun and the smallest in the Solar
    System.
*   Earth.
Out
1:11-3:1: Unexpected `1` blank line between list items, expected `0` blank lines, remove `1` blank line
6:11-8:1: Unexpected `1` blank line between list items, expected `0` blank lines, remove `1` blank line
13:12-14:1: Unexpected `0` blank lines between list items, expected `1` blank line, add `1` blank line

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-list-item-spacing@5, 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