.eslintrc.js

module.exports = {
  parser: '@typescript-eslint/parser',
  parserOptions: {
    project: './tsconfig.json',
    tsconfigRootDir: __dirname,
    sourceType: 'module',
  },
  plugins: ['@typescript-eslint/eslint-plugin', 'import'],
  extends: [
    'airbnb-base',
    'airbnb-typescript/base',
    'plugin:@typescript-eslint/recommended',
    'plugin:prettier/recommended',
    'plugin:import/recommended',
  ],
  root: true,
  env: {
    node: true,
    jest: true,
  },
  ignorePatterns: ['.eslintrc.js'],
  settings: {
    'import/extensions': ['.js', '.jsx', '.ts', '.tsx'],
    'import/parsers': {
      '@typescript-eslint/parser': ['.ts', '.tsx'],
    },
    'import/resolver': {
      node: {
        extensions: ['.js', '.jsx', '.ts', '.tsx'],
      },
    },
  },
  rules: {
    'import/extensions': [
      'error',
      'ignorePackages',
      {
        js: 'never',
        jsx: 'never',
        ts: 'never',
        tsx: 'never',
        json: 'never',
      },
    ],
    'no-use-before-define': 'off',
    '@typescript-eslint/no-use-before-define': 'off',
    'import/prefer-default-export': 'off',
    'no-alert': 'off',
    'import/order': [
      'error',
      {
        groups: ['builtin', 'external', 'internal', 'parent', 'sibling', 'index'],
        'newlines-between': 'always',
        alphabetize: { order: 'desc', caseInsensitive: true },
      },
    ],
    'prettier/prettier': ['error', { endOfLine: 'auto' }],
  },
};