Minimal ESLint configuration for reducing version control noise and avoiding common mistakes.

• Prevent code patterns which frequently cause or lead to bugs.
• Produce consistent source code without requiring functional changes.
• Prefer rules which are auto-fixable.
• Avoid rules which require frequent inline disabling.
• Avoid rules which are already covered by TypeScript.

Install the eslint-config-rational package.

npm i -D eslint-config-rational eslint typescript

Add the rational configuration to your eslint.config.js (flat) configuration file.

import rational from 'eslint-config-rational';

export default rational();

The rational(options?) configuration factory accepts the following options.

• ignores: Add ESLint global ignores. Defaults to ['**/{.git,node_modules,out,lib,dist}'].
• jsExtensions: Array of file extensions to lint as JavaScript. Defaults to ['.js', '.cjs', '.mjs', '.jsx'].
• tsExtensions: Array of file extensions to lint as TypeScript. Defaults to ['.ts', '.cts', '.mts', '.tsx'].
• jsxExtensions: Array of file extensions to lint as JSX. Defaults to ['.jsx', '.tsx'].
• relaxedFiles: Array of file paths to lint with relaxed rules. Defaults to ['**/*.test.*', '**/*.spec.*', '**/*.config.*', '**/*.setup.*', '**/.*rc.*', '**/*.story.*', '**/__*', '**/__*/**', '**/.*', '**/.*/**'].
• enableImports: Enable import rules. Defaults to true.
• enableUnicorn: Enable unicorn rules. Defaults to true.
• enableReact: Enable react rules. Defaults to true.
• enableTypescript: Enable typescript rules. Defaults to true.
• enableStylistic: Enable ESLint Stylistic rules. Defaults to true.
• extend: One or more ESLint configurations to extend (nested arrays allowed).
• override: One or more ESLint override configurations (nested arrays allowed).

import rational from 'eslint-config-rational';

export default rational({
  ignores: ['**/{.git,node_modules,out,lib,dist}'],
  jsExtensions: ['.js', '.cjs', '.mjs', '.jsx'],
  tsExtensions: ['.ts', '.cts', '.mts', '.tsx'],
  jsxExtensions: ['.jsx', '.tsx'],
  relaxedFiles: [
    '**/*.test.*',
    '**/*.spec.*',
    '**/*.config.*',
    '**/*.setup.*',
    '**/*.story.*',
    '**/__*.*',
    '**/__*/**',
    '**/.*.*',
    '**/.*/**',
  ],
  enableImports: true,
  enableUnicorn: true,
  enableReact: true,
  enableTypescript: true,
  enableStylistic: true,
  extend: [
    // ESLint configuration or (nested) array of configurations which
    // will precede the rational configuration.
  ],
  override: [
    // ESLint configuration or (nested) array of configurations which
    // will follow the rational configuration.
  ],
});