remark-lint

What is remark-lint?

remark-lint is a plugin for remark, a Markdown processor powered by plugins. It provides a framework for analyzing and reporting on Markdown code quality issues, ensuring consistency and adherence to specified style guidelines.

What are remark-lint's main functionalities?

Linting Markdown Files

This feature allows you to lint Markdown files to ensure they adhere to specified style guidelines. The code sample demonstrates how to use remark-lint to process a simple Markdown string and report any issues.

const remark = require('remark');
const lint = require('remark-lint');

remark()
  .use(lint)
  .process('# Hello world!', function (err, file) {
    console.error(report(err || file));
  });

Custom Rules

remark-lint supports custom rules, allowing you to enforce specific style guidelines. The code sample shows how to use a custom rule (remark-lint-no-emphasis-as-heading) to lint a Markdown string.

const remark = require('remark');
const lint = require('remark-lint');
const noEmphasisAsHeading = require('remark-lint-no-emphasis-as-heading');

remark()
  .use(lint)
  .use(noEmphasisAsHeading)
  .process('# Hello *world*!', function (err, file) {
    console.error(report(err || file));
  });

Configurable Presets

remark-lint provides configurable presets that bundle multiple rules together for convenience. The code sample demonstrates how to use the 'remark-preset-lint-recommended' preset to lint a Markdown string.

const remark = require('remark');
const lint = require('remark-lint');
const presetLintRecommended = require('remark-preset-lint-recommended');

remark()
  .use(lint)
  .use(presetLintRecommended)
  .process('# Hello world!', function (err, file) {
    console.error(report(err || file));
  });

Other packages similar to remark-lint

markdownlint

markdownlint is a Node.js style checker and lint tool for Markdown files. It provides a set of rules to enforce consistent Markdown style and can be customized with configuration files. Compared to remark-lint, markdownlint is more focused on providing a comprehensive set of built-in rules and is often used as a standalone tool.

markdown-it

markdown-it is a Markdown parser that can be extended with plugins to add custom functionality, including linting. While markdown-it is primarily a parser, it can be combined with plugins to achieve similar linting capabilities as remark-lint. However, it is more flexible and less opinionated about style rules.

textlint

textlint is a text linting framework that supports multiple file formats, including Markdown. It allows users to define custom rules and plugins to enforce style guidelines. textlint is more versatile than remark-lint, as it can be used to lint various types of text files, not just Markdown.

README

remark-lint

remark plugin to support configuration comments for remark-lint rules.

Contents

• What is this?
• When should I use this?
• Presets
• Install
• Use
• API
  • unified().use(remarkLint)
• Compatibility
• Contribute
• License

What is this?

This plugin adds support for configuration comments to control remark lint rule messages.

When should I use this?

This project is useful when you’re using remark lint rules and want to let authors ignore messages in certain cases. This package is already included in all our presets. If you’re building a preset yourself, you should include this package.

Presets

This plugin is included in the following presets:

Preset	Options
remark-preset-lint-consistent
remark-preset-lint-markdown-style-guide
remark-preset-lint-recommended

Install

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

npm install remark-lint

In Deno with esm.sh:

import remarkLint from 'https://esm.sh/remark-lint@10'

In browsers with esm.sh:

<script type="module">
  import remarkLint from 'https://esm.sh/remark-lint@10?bundle'
</script>

Use

On the API:

import remarkLint from 'remark-lint'
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(remarkStringify)
  .process(file)

console.error(reporter(file))

On the CLI:

remark --frail --use remark-lint .

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

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

API

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

unified().use(remarkLint)

Add support for configuration comments.

See Ignore warnings in the monorepo readme for how to use it.

Returns

Transform (Transformer from unified).

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@10, 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