.eslintrc.js

'use strict';

module.exports = {
  parser: require.resolve('@typescript-eslint/parser'),
  extends: [
    'plugin:n/recommended',
    'plugin:@typescript-eslint/eslint-recommended',
    'plugin:react/recommended',
    'prettier',
  ],
  plugins: ['prettier', 'import', '@typescript-eslint', 'react', 'react-hooks'],
  parserOptions: {
    ecmaVersion: 2018,
  },
  env: {
    node: true,
    es6: true,
  },
  rules: {
    '@typescript-eslint/array-type': ['error', { default: 'array-simple' }],
    '@typescript-eslint/no-require-imports': 'off',
    '@typescript-eslint/prefer-ts-expect-error': 'error',
    '@typescript-eslint/ban-types': 'error',
    '@typescript-eslint/no-unused-vars': [
      'error',
      { argsIgnorePattern: '^_', caughtErrors: 'all' },
    ],
    '@typescript-eslint/consistent-type-imports': [
      'error',
      { fixStyle: 'inline-type-imports', disallowTypeAnnotations: false },
    ],
    '@typescript-eslint/no-import-type-side-effects': 'error',
    'no-else-return': 'error',
    'no-negated-condition': 'error',
    eqeqeq: ['error', 'smart'],
    strict: 'error',
    'prefer-template': 'warn',
    'object-shorthand': ['warn', 'always', { avoidExplicitReturnArrows: true }],
    'prefer-destructuring': [
      'error',
      { VariableDeclarator: { array: true, object: true } },
    ],
    'sort-imports': ['error', { ignoreDeclarationSort: true }],
    'prettier/prettier': 'error',
    // TS covers this
    'n/no-missing-import': 'off',
    'n/no-unsupported-features/es-syntax': 'off',
    'n/no-unsupported-features/es-builtins': 'error',
    'import/no-commonjs': 'error',
    'import/no-duplicates': 'error',
    'import/no-extraneous-dependencies': 'error',
    'import/no-unused-modules': 'error',
    'react-hooks/rules-of-hooks': 'error',
    'react-hooks/exhaustive-deps': 'error',
    // handled by TS
    'react/prop-types': 'off',
  },
  settings: {
    react: {
      version: 'detect',
    },
  },
  overrides: [
    {
      files: 'src/**/*',
      parserOptions: {
        sourceType: 'module',
      },
    },
    {
      files: ['.eslintrc.js', 'babel.config.js'],
      rules: {
        'import/no-commonjs': 'off',
      },
    },
  ],
};