@jsimck/eslint-config

Opinionated shareable ESLint flat config for JavaScript/TypeScript projects, including React, import ordering, SonarJS, Unicorn, and Prettier.

Install

pnpm add -D eslint@9 @jsimck/eslint-config

Usage

Create eslint.config.js (or eslint.config.mjs) in your project root:

import baseConfig from '@jsimck/eslint-config';

export default [...baseConfig];

Lint Scripts

{
  "scripts": {
    "lint": "eslint .",
    "lint:fix": "pnpm lint --fix"
  }
}

Available Configs

Default export already includes several presets. You can also import individual configs from @jsimck/eslint-config/configs.

Config Name	Description	Included In Default
base	Global ignores, browser/node globals, parser options	✅
stylistic	@stylistic/eslint-plugin spacing and line rules	✅
javascript	@eslint/js recommended + custom JS rules	✅
typescript	TypeScript parser and non-typechecked TS rules	✅
react	eslint-plugin-react, react-hooks, react-refresh, jsx-a11y	✅
imprt	eslint-plugin-import-x rules and resolver setup	✅
sonarjs	eslint-plugin-sonarjs recommended + overrides	✅
unicorn	eslint-plugin-unicorn recommended + overrides	✅
unusedImports	eslint-plugin-unused-imports	✅
prettier	eslint-plugin-prettier/recommended + local prettier options	✅
vitest	@vitest/eslint-plugin rules for tests	❌
typescriptTypeChecked	Type-aware TypeScript rules (requires project service)	❌
sortClassMembers	eslint-plugin-sort-class-members	❌

Example with optional configs:

import baseConfig from '@jsimck/eslint-config';
import {
  vitest,
  typescriptTypeChecked,
  sortClassMembers,
} from '@jsimck/eslint-config/configs';

export default [
  ...baseConfig,
  ...typescriptTypeChecked,
  ...sortClassMembers,
  ...vitest,
];

Advanced Usage

All configs are individually importable from @jsimck/eslint-config/configs, so you can compose only what you need:

import {
  base,
  stylistic,
  typescript,
  react,
  imprt,
  unusedImports,
} from '@jsimck/eslint-config/configs';

export default [
  ...base,
  ...stylistic,
  ...typescript,
  ...react,
  ...imprt,
  ...unusedImports,
];

Note: The base config provides global ignores (node_modules, dist, build, etc.) and browser/node globals. It's recommended as a foundation for any custom composition.

Overriding Rules

You can override any rule by appending your own config object after the presets:

import baseConfig from '@jsimck/eslint-config';

export default [
  ...baseConfig,
  {
    rules: {
      'prettier/prettier': ['error', { singleQuote: false, semi: false }],
      '@typescript-eslint/no-explicit-any': 'off',
    },
  },
];

Adding Prettier Plugins

The prettierOptions object is exported separately, so you can extend it with plugins like Tailwind CSS class sorting:

import { createRequire } from 'node:module';
import baseConfig from '@jsimck/eslint-config';
import { prettierOptions } from '@jsimck/eslint-config/configs';

const require = createRequire(import.meta.url);

export default [
  ...baseConfig,
  {
    rules: {
      'prettier/prettier': [
        'error',
        {
          ...prettierOptions,
          plugins: [
            require.resolve('prettier-plugin-tailwindcss'),
          ],
        },
      ],
    },
  },
];

Replacing a Config

To use the defaults but swap out a specific config (e.g. use your own prettier setup), import configs individually and omit what you don't need:

import {
  base,
  stylistic,
  javascript,
  typescript,
  react,
  imprt,
  sonarjs,
  unicorn,
  unusedImports,
} from '@jsimck/eslint-config/configs';

export default [
  ...base,
  ...stylistic,
  ...javascript,
  ...typescript,
  ...react,
  ...imprt,
  ...sonarjs,
  ...unicorn,
  ...unusedImports,
  // your own prettier or formatting config here
];

Contributing

Include a changeset with user-facing changes:

pnpm changeset

Release

pnpm release