base-eslintrc.js

// # https://github.com/typescript-eslint/typescript-eslint/blob/master/docs/getting-started/linting/README.md
module.exports = {
  parser: '@typescript-eslint/parser',
  plugins: ['@typescript-eslint', 'prettier'],
  extends: [
    'eslint:recommended',
    'prettier',
    'plugin:@typescript-eslint/eslint-recommended',
    'plugin:@typescript-eslint/recommended',
    'plugin:@typescript-eslint/recommended-requiring-type-checking',
  ],
  rules: {
    'no-console': 'error',
    'prettier/prettier': [
      'error',
      {
        endOfLine: 'auto',
      },
    ],
    '@typescript-eslint/explicit-function-return-type': 'error',
    '@typescript-eslint/no-confusing-non-null-assertion': 'error',
    '@typescript-eslint/no-explicit-any': 'error',
    '@typescript-eslint/no-extraneous-class': 'error',
    '@typescript-eslint/no-invalid-void-type': 'error',
    '@typescript-eslint/prefer-ts-expect-error': 'error',
    '@typescript-eslint/type-annotation-spacing': 'error',
    '@typescript-eslint/typedef': 'error',
    '@typescript-eslint/unified-signatures': 'error',
  },
  // https://eslint.org/docs/user-guide/configuring/ignoring-code#ignorepatterns-in-config-files
  ignorePatterns: [
    'node_modules/**',
    'app/node_modules/**',
    'app/lib/**',
    'lib/**',
    'built-tests/**',
    'coverage/**',
  ],
};