unified

Project: mdx-js/eslint-mdx

Package: eslint-mdx@2.0.5

  1. Dependents: 0
  2. ESLint Parser for MDX
  1. mdx 36
  2. eslint 4
  3. eslint-mdx 2

GitHub Actions Codecov type-coverage GitHub release

Renovate enabled Conventional Commits code style: prettier changesets

ESLint Parser/Plugin for MDX, helps you lint all ES syntaxes. Linting code blocks can be enabled with mdx/code-blocks setting too! Work perfectly with eslint-plugin-import, eslint-plugin-prettier or any other eslint plugins. And also can be integrated with remark-lint plugins to lint markdown syntaxes.

TOC

VSCode Extension

Visual Studio Marketplace Version

VSCode MDX: Integrates with VSCode ESLint, syntaxes highlighting and error reporting.

Packages

This repository is a monorepo managed by Lerna what means we actually publish several packages to npm from same codebase, including:

PackageDescriptionVersion
eslint-mdxESLint Parser for MDXnpm
eslint-plugin-mdxESLint Plugin, Configuration and Rules for MDXnpm

Install

# yarn
yarn add -D eslint-plugin-mdx

# npm
npm i -D eslint-plugin-mdx

Notice

If you're using multi languages, js/jsx/ts/tsx/vue, etc for example, you'd better to always use overrides feature of ESLint, because configs may be overridden by following configs.

See #251 for more details.

Usage

Classic

.eslintrc file:

{
  "extends": ["plugin:mdx/recommended"],
  // optional, if you want to lint code blocks at the same time
  "settings": {
    "mdx/code-blocks": true,
    // optional, if you want to disable language mapper, set it to `false`
    // if you want to override the default language mapper inside, you can provide your own
    "mdx/language-mapper": {}
  }
}

Flat Config

eslint.config.js file:

import * as mdx from 'eslint-plugin-mdx'

export default [
  {
    ...mdx.flat,
    // optional, if you want to lint code blocks at the same
    processor: mdx.createRemarkProcessor({
      lintCodeBlocks: true,
      // optional, if you want to disable language mapper, set it to `false`
      // if you want to override the default language mapper inside, you can provide your own
      languageMapper: {},
    }),
  },
  {
    ...mdx.flatCodeBlocks,
    rules: {
      ...mdx.flatCodeBlocks.rules,
      // if you want to override some rules for code blocks
      'no-var': 'error',
      'prefer-const': 'error',
    },
  },
]

Then, make sure ESLint knows to run on .md or .mdx files:

eslint . --ext js,md,mdx

Parser Options

  1. extensions (string | string[]): eslint-mdx will only resolve .mdx files by default, if you want to resolve other extensions as like .mdx, you can use this option.

  2. markdownExtensions (string | string[]): eslint-mdx will only treat .md files as plain markdown by default, and will lint them via remark plugins. If you want to resolve other extensions as like .md, you can use this option.

  3. ignoreRemarkConfig (boolean): Ignore the remark configuration defined in the project.

Rules

mdx/remark

possible fixable depends on your remark plugins:

Integration with remark-lint plugins, it will read remark's configuration automatically via cosmiconfig. But .remarkignore will not be respected, you should use .eslintignore instead.

If you want to disable or change severity of some related rules, it won't work by setting rules in eslint config like 'remark-lint-no-duplicate-headings': 0, you should change your remark config instead like following:

{
  "plugins": [
    "@1stg/remark-config",
    // change to error severity, notice `[]` is required
    ["lint-no-duplicate-headings", [2]],
    // disable following plugin
    [
      "lint-no-multiple-toplevel-headings",
      [0] // or false
    ]
  ]
}

Prettier Integration

If you're using remark-lint feature with Prettier both together, you can try remark-preset-prettier which helps you to turn off all rules that are unnecessary or might conflict with Prettier.

{
  "plugins": [
    "preset-lint-consistent",
    "preset-lint-recommended",
    "preset-lint-markdown-style-guide",
    "preset-prettier"
  ]
}

Sponsors

1stGRxTSUnTS
1stG Open Collective backers and sponsorsRxTS Open Collective backers and sponsorsUnTS Open Collective backers and sponsors

unified Open Collective backers and sponsors

Backers

1stGRxTSUnTS
1stG Open Collective backers and sponsorsRxTS Open Collective backers and sponsorsUnTS Open Collective backers and sponsors

unified Open Collective backers and sponsors

Changelog

Detailed changes for each release are documented in CHANGELOG.md.

License

MIT © JounQin@1stG.me