.eslintrc.js

module.exports = {
  env: {
    browser: true,
    es2021: true,
    jest: true,
  },
  globals: {
    React: true,
    JSX: true,
  },
  extends: [
    'plugin:react/recommended',
    'next/core-web-vitals',
    'plugin:storybook/recommended',
    'plugin:cypress/recommended',
    'prettier',
  ],
  parser: '@typescript-eslint/parser',
  parserOptions: {
    ecmaFeatures: {
      jsx: true,
    },
    ecmaVersion: 12,
    sourceType: 'module',
    warnOnUnsupportedTypeScriptVersion: false,
  },
  plugins: ['react', '@typescript-eslint'],
  rules: {
    'react/react-in-jsx-scope': 'off',
    'react/function-component-definition': [
      2,
      {
        namedComponents: 'arrow-function',
        unnamedComponents: 'arrow-function',
      },
    ],
    'react/jsx-filename-extension': [
      'error',
      {
        extensions: ['tsx'],
      },
    ],
    'no-unused-vars': 'off',
    '@typescript-eslint/no-unused-vars': ['warn'],
    'no-use-before-define': 'off',
    '@typescript-eslint/no-use-before-define': ['error'],
    'import/no-extraneous-dependencies': [
      'error',
      {
        devDependencies: true,
      },
    ],
    'import/extensions': [
      'error',
      'ignorePackages',
      {
        js: 'never',
        jsx: 'never',
        ts: 'never',
        tsx: 'never',
      },
    ],
    'import/prefer-default-export': 'off',
    'import/no-cycle': 'off',
    'react/require-default-props': 'off',
    'jsx-a11y/anchor-is-valid': 'off',
    'jsx-a11y/label-has-associated-control': [
      'error',
      {
        required: {
          some: ['nesting'],
        },
      },
    ],
  },
  overrides: [
    {
      files: ['*stories.tsx'],
      rules: {
        'react/jsx-props-no-spreading': 'off',
        'no-param-reassign': 'off',
      },
    },
    {
      files: ['*.ts', '*.tsx'],
      rules: {
        'no-undef': 'off',
      },
    },
  ],
}

// Note: About no-undef for .ts files.
// https://stackoverflow.com/questions/60743389/eslint-defined-global-extensions-still-not-defined-no-undef