variance/eslint.config.js

import { fixupConfigRules, fixupPluginRules } from '@eslint/compat';
import react from 'eslint-plugin-react';
import typescriptEslint from '@typescript-eslint/eslint-plugin';
import deprecation from 'eslint-plugin-deprecation';
import globals from 'globals';
import tsParser from '@typescript-eslint/parser';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import js from '@eslint/js';
import { FlatCompat } from '@eslint/eslintrc';

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const compat = new FlatCompat({
  baseDirectory: __dirname,
  recommendedConfig: js.configs.recommended,
  allConfig: js.configs.all,
});

export default [
  {
    ignores: ['**/experiment', '**/node_modules'],
  },
  ...fixupConfigRules(
    compat.extends(
      'eslint:recommended',
      'plugin:react/recommended',
      'plugin:react-hooks/recommended',
      'plugin:@typescript-eslint/eslint-recommended',
      'plugin:@typescript-eslint/recommended',
      'airbnb',
      'prettier',
      'plugin:deprecation/recommended',
    ),
  ),
  {
    plugins: {
      react: fixupPluginRules(react),
      '@typescript-eslint': fixupPluginRules(typescriptEslint),
    },

    languageOptions: {
      globals: {
        ...globals.browser,
      },

      parser: tsParser,
      ecmaVersion: 'latest',
      sourceType: 'module',

      parserOptions: {
        ecmaFeatures: {
          jsx: true,
        },
        project: true,
      },
    },

    rules: {
      'linebreak-style': 0,
      'no-underscore-dangle': 0,
      'import/prefer-default-export': 'off',
      'import/extensions': 'off',
      'import/no-unresolved': 'off',

      'import/no-extraneous-dependencies': [
        'error',
        {
          devDependencies: true,
        },
      ],

      'react/no-unstable-nested-components': [
        'error',
        {
          allowAsProps: true,
        },
      ],

      'react/jsx-filename-extension': [
        'error',
        {
          extensions: ['.tsx', '.jsx'],
        },
      ],

      'react/require-default-props': 'off',
      'react/jsx-props-no-spreading': 'off',
      'react-hooks/rules-of-hooks': 'error',
      'react-hooks/exhaustive-deps': 'error',
      '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
      'no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
      'no-console': 'off',
      'no-use-before-define': 'off',
    },
  },
];