.eslintrc.js

module.exports = {
  parser: '@typescript-eslint/parser',
  plugins: ['@typescript-eslint', 'jest'],
  env: {
    commonjs: true,
    es6: true,
    node: true,
    'jest/globals': true,
  },
  extends: ['airbnb-typescript/base', 'prettier'],
  globals: {
    Atomics: 'readonly',
    SharedArrayBuffer: 'readonly',
  },
  parserOptions: {
    ecmaVersion: 2018,
    project: './tsconfig.json',
  },
  ignorePatterns: ['node_modules', '**/*.js'],
  rules: {
    '@typescript-eslint/no-floating-promises': ['error'],
    'no-void': ['error', { allowAsStatement: true }],
    'import/no-extraneous-dependencies': ['error', { devDependencies: ['**/*.test.ts'] }],
    'import/prefer-default-export': ['off'],
    'object-curly-newline': ['off'],
    'no-await-in-loop': ['off'],
    'operator-linebreak': ['off'],
    'import/extensions': [
      'error',
      'ignorePackages',
      {
        js: 'never',
        ts: 'never',
      },
    ],
    'no-restricted-syntax': [
      'error',
      {
        selector: 'ForInStatement',
        message:
          'for..in loops iterate over the entire prototype chain, which is virtually never what you want. Use Object.{keys,values,entries}, and iterate over the resulting array.',
      },
      {
        selector: 'LabeledStatement',
        message: 'Labels are a form of GOTO; using them makes code confusing and hard to maintain and understand.',
      },
      {
        selector: 'WithStatement',
        message: '`with` is disallowed in strict mode because it makes code impossible to predict and optimize.',
      },
    ],
  },
  settings: {
    'import/resolver': {
      node: {
        extensions: ['.js', '.ts'],
      },
    },
  },
  overrides: [
    {
      files: ['**/*.test.ts'],
      rules: {
        'global-require': 'off',
      },
    },
  ],
};