CSSSR's linting configs for Prettier and ESLint.

Documentation

Installation

First install @csssr/linters itself:

npm i -D @csssr/linters

yarn add -D @csssr/linters

Then install peer dependencies (Prettier, ESLint and its plugins):

npx install-peerdeps -D @csssr/linters

Prettier configuration

You may use your own Prettier config or use predefined one:

// File: .prettierrc.js
module.exports = {
  ...require('@csssr/linters/prettier.config'),
}

ESLint configuration

There are several predefined configurations, which you may include in your project based on your project needs:

• eslint/base - basic JavaScript rules including Prettier rule
• exlint/react - React and JSX rules
• eslint/typescript - TS-specific rules

Linting Babel project

Install @babel/eslint-parser and add it as a parser to ESLint config:

// File: .eslintrc.js
module.exports = {
  parser: "@babel/eslint-parser",
  extends: [
    require.resolve('@csssr/linters/eslint/base'),
    require.resolve('@csssr/linters/eslint/react'),
  ],
}

Linting TypeScript project

// File: .eslintrc.js
module.exports = {
  extends: [
    require.resolve('@csssr/linters/eslint/base'),
    require.resolve('@csssr/linters/eslint/react'),
    require.resolve('@csssr/linters/eslint/typescript'),
  ],
}

tsconfig.json from root of the project will be used for gathering type info for some rules. If your TS config is located elsewhere, configure its path in parserOptions.project field of ESLint config.

Only files specified in include section of tsconfig.json will be linted. Because of that configs located in the root folder (.eslintrc.js, .prettierrc.js, etc.) will not be linted but can still be formatted with Prettier.

Linting mixed project (JS and TS)

module.exports = {
  extends: [
    require.resolve('@csssr/linters/eslint/base'),
  ],
  overrides: [
    {
      files: ['**/*.ts', '**/*.tsx'],
      extends: [require.resolve('@csssr/linters/eslint/typescript')],
    },
  ],
}

Customization

Feel free to add new plugins and rules and disable existing rules which are not suitable for your project's needs:

// File: .eslintrc.js
module.exports = {
  extends: [
    require.resolve('@csssr/linters/eslint/base'),
    require.resolve('@csssr/linters/eslint/react'),
    require.resolve('@csssr/linters/eslint/typescript'),
  ],
  plugins: ['todo-plz'],
  rules: {
    // Disabling for Next project
    'jsx-a11y/anchor-is-valid': 'off',
    
    // New rule for linting todos
    'todo-plz/ticket-ref': [
      'error',
      {
        pattern: 'PROJ-[0-9]+',
        terms: ['TODO', 'todo'],
      },
    ],
  },
  overrides: [
    {
      // Storybook's CSF requires usage of default exports
      files: ['./src/**/index.stories.tsx'],
      rules: {
        'import/no-default-export': ['off'],
      },
    },
  ],
}

You can find more recommendations for manual configuration here.

Contributing