.eslintrc.js

module.exports = {
  parser: '@typescript-eslint/parser',
  parserOptions: {
    project: './tsconfig.json',
    sourceType: 'module',
    ecmaVersion: 'latest',
    emitDecoratorMetadata: true,
  },
  plugins: ['@typescript-eslint/eslint-plugin', 'nestjs', 'node'],
  extends: [
    'airbnb-base',
    'airbnb-typescript/base',
    'plugin:@typescript-eslint/recommended',
    'plugin:nestjs/recommended',
    'plugin:node/recommended-module',
    'plugin:prettier/recommended',
    'prettier',
  ],
  root: true,
  env: {
    node: true,
    jest: true,
  },
  settings: {
    'import/resolver': {
      typescript: {},
    },
  },
  ignorePatterns: ['.eslintrc.cjs', 'test/setup.jest.cjs', 'types/google'],
  rules: {
    // note you must disable the base rule as it can report incorrect errors
    // https://github.com/typescript-eslint/typescript-eslint/issues/2484#issuecomment-687257773
    'no-shadow': 'off',
    'no-use-before-define': 'error',
    'no-nested-ternary': 'off',
    'no-warning-comments': 'warn',
    '@typescript-eslint/no-shadow': ['error'],
    '@typescript-eslint/naming-convention': 'warn',
    // it doesn't understand top-level await
    'node/no-unsupported-features/es-syntax': 'warn',
    '@typescript-eslint/no-empty-interface': 'warn',
    'node/no-extraneous-import': 'warn',
    'node/no-unpublished-import': 'warn',
    'max-classes-per-file': 'off',
    '@typescript-eslint/interface-name-prefix': 'off',
    '@typescript-eslint/explicit-function-return-type': 'off',
    '@typescript-eslint/explicit-module-boundary-types': 'off',
    '@typescript-eslint/no-misused-promises': ['error'],
    'node/no-missing-import': 'off',
    'import/no-cycle': 'warn',
    '@typescript-eslint/no-throw-literal': 'error',
    '@typescript-eslint/no-explicit-any': 'off',
    '@typescript-eslint/no-floating-promises': ['error'],
    'no-console': 'error',
    'no-invalid-this': 'error',
    '@typescript-eslint/require-await': 'error',
    '@typescript-eslint/await-thenable': 'error',
    '@typescript-eslint/consistent-type-imports': [
      'error',
      {
        prefer: 'type-imports',
        disallowTypeAnnotations: true,
        fixStyle: 'inline-type-imports',
      },
    ],
    '@typescript-eslint/ban-ts-comment': 'error',
    '@typescript-eslint/no-loop-func': 'warn',
    'import/prefer-default-export': 'off',
    // needed for TS and importing CJS modules
    'import/extensions': [
      'error',
      'always',
      {
        ignorePackages: false,
        pattern: {
          '': 'always',
          ts: 'never',
          js: 'never',
        },
      },
    ],
    'no-useless-constructor': 'off',
    '@typescript-eslint/no-useless-constructor': ['error'],
    'no-empty-function': 'off',
    'import/no-extraneous-dependencies': 'off',
    camelcase: 'off',
    'no-restricted-syntax': ['error', 'WithStatement'],
    'class-methods-use-this': 'off',
    'no-underscore-dangle': 'off',
    '@typescript-eslint/no-unused-vars': 'error',
    'no-await-in-loop': 'off',
    'no-continue': 'off',
    'no-plusplus': 'off',
  },
};