.eslintrc.js

// https://eslint.org/docs/user-guide/configuring/configuration-files
// https://eslint.org/docs/user-guide/configuring/configuration-files
// eslint-disable-next-line import/no-commonjs
module.exports = {
  root: true,
  env: {
    node: true,
    es6: true,
    'jest/globals': true,
  },
  plugins: ['jest', '@typescript-eslint'],
  extends: ['plugin:github/recommended'],
  parser: '@typescript-eslint/parser',
  parserOptions: {
    ecmaVersion: 9,
    sourceType: 'module',
    project: './tsconfig.eslint.json',
  },
  rules: {
    'no-console': 'off',
    'i18n-text/no-en': 'off',
    'eslint-comments/no-use': 'off',
    'import/no-namespace': 'off',
    'no-unused-vars': 'off',
    '@typescript-eslint/no-unused-vars': 'error',
    '@typescript-eslint/explicit-member-accessibility': [
      'error',
      {
        accessibility: 'no-public',
      },
    ],
    '@typescript-eslint/no-require-imports': 'error',
    '@typescript-eslint/array-type': 'error',
    '@typescript-eslint/await-thenable': 'error',
    '@typescript-eslint/ban-ts-comment': 'error',
    camelcase: 'off',
    '@typescript-eslint/consistent-type-assertions': 'error',
    '@typescript-eslint/explicit-function-return-type': [
      'error',
      {
        allowExpressions: true,
      },
    ],
    '@typescript-eslint/no-array-constructor': 'error',
    '@typescript-eslint/no-empty-interface': 'error',
    '@typescript-eslint/no-explicit-any': 'error',
    '@typescript-eslint/no-extraneous-class': 'error',
    '@typescript-eslint/no-for-in-array': 'error',
    '@typescript-eslint/no-inferrable-types': 'error',
    '@typescript-eslint/no-misused-new': 'error',
    '@typescript-eslint/no-namespace': 'error',
    '@typescript-eslint/no-non-null-assertion': 'warn',
    '@typescript-eslint/no-unnecessary-qualifier': 'error',
    '@typescript-eslint/no-unnecessary-type-assertion': 'error',
    '@typescript-eslint/no-useless-constructor': 'error',
    '@typescript-eslint/no-var-requires': 'error',
    '@typescript-eslint/prefer-for-of': 'warn',
    '@typescript-eslint/prefer-function-type': 'warn',
    '@typescript-eslint/prefer-includes': 'error',
    '@typescript-eslint/prefer-string-starts-ends-with': 'error',
    '@typescript-eslint/promise-function-async': 'error',
    '@typescript-eslint/require-array-sort-compare': 'error',
    '@typescript-eslint/restrict-plus-operands': 'error',
    semi: 'off',
    '@typescript-eslint/unbound-method': 'error',
    'prettier/prettier': [
      'error',
      // Keep same in .prettierrc.js
      {
        printWidth: 120,
        tabWidth: 2,
        useTabs: false,
        semi: true,
        singleQuote: true,
        trailingComma: 'all',
        bracketSpacing: false,
        arrowParens: 'always',
      },
    ],
    'filenames/match-regex': 'off',
    'no-shadow': 'off',
    '@typescript-eslint/no-shadow': ['error'],
  },
};