@alza54/eslint-config-typescript/recommended.js

Strict shareable config for ESLint and TypeScript that I use for my projects

'use strict';

/*
 * This configuration does not require your code to compile,
 * only uses AST that is fast and cheap.
 */

module.exports = {
  'extends': './base.js',

  'rules': {
    // naming
    '@typescript-eslint/no-this-alias': [
      'error', { 'allowDestructuring': true },
    ],
    '@typescript-eslint/generic-type-naming': ['error', '^[A-Z][a-zA-Z]+$'],

    /*
     * TODO: Consider
     *  'import/no-extraneous-dependencies': ['error', { devDependencies: true }]
     */

    // indentation and spacing
    '@typescript-eslint/indent': ['error', 2],
    'func-call-spacing': 'off',
    '@typescript-eslint/func-call-spacing': ['error', 'never'],

    // parens and semicolons
    'no-extra-parens': 'off',
    '@typescript-eslint/no-extra-parens': ['error', 'all', { 'nestedBinaryExpressions': false }],

    'semi': 'off',
    '@typescript-eslint/semi': ['error', 'always'],

    '@typescript-eslint/member-delimiter-style': ['error', {
      'multiline': { 'delimiter': 'semi', 'requireLast': true },
      'singleline': { 'delimiter': 'comma', 'requireLast': false },
    }],

    // design
    '@typescript-eslint/no-extraneous-class': 'error',
    '@typescript-eslint/no-for-in-array': 'error',
    '@typescript-eslint/prefer-for-of': 'error',
    '@typescript-eslint/no-useless-constructor': 'error',
    '@typescript-eslint/unified-signatures': 'error',

    '@typescript-eslint/adjacent-overload-signatures': 'error',
    '@typescript-eslint/array-type': ['error', { 'default': 'array', 'readonly': 'array' }],
    '@typescript-eslint/ban-types': 'error',
    'brace-style': 'off',
    '@typescript-eslint/brace-style': ['error', '1tbs', { 'allowSingleLine': true }],

    '@typescript-eslint/consistent-type-assertions': ['error', {
      'assertionStyle': 'as',
      'objectLiteralTypeAssertions': 'allow-as-parameter',
    }],

    // so developer can see all existing arguments
    '@typescript-eslint/no-unused-vars': ['error', { 'args': 'none' }],

    // overrides of recommended config
    '@typescript-eslint/explicit-function-return-type': ['error', {
      'allowExpressions': true,
      'allowTypedFunctionExpressions': true,
    }],
  },
};