@quick-start/create-node-lib/template/base/eslint.config.js

An easy way to start a Node.js library

// ts-check

import eslint from '@eslint/js'
import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended'
import globals from 'globals'
import tseslint from 'typescript-eslint'

export default tseslint.config(
  { ignores: ['**/node_modules', '**/dist'] },
  eslint.configs.recommended,
  tseslint.configs.recommended,
  eslintPluginPrettierRecommended,
  {
    languageOptions: {
      parser: tseslint.parser,
      parserOptions: {
        sourceType: 'module',
        ecmaVersion: 2022
      },
      globals: {
        ...globals.browser,
        ...globals.node
      }
    },
    rules: {
      'prettier/prettier': 'warn',
      '@typescript-eslint/ban-ts-comment': [
        'error',
        { 'ts-ignore': 'allow-with-description' }
      ],
      '@typescript-eslint/explicit-function-return-type': [
        'error',
        {
          allowExpressions: true,
          allowTypedFunctionExpressions: true,
          allowHigherOrderFunctions: true,
          allowIIFEs: true
        }
      ],
      '@typescript-eslint/explicit-module-boundary-types': 'off',
      '@typescript-eslint/no-empty-function': [
        'error',
        { allow: ['arrowFunctions'] }
      ],
      '@typescript-eslint/no-empty-object-type': [
        'error',
        { allowInterfaces: 'always' }
      ],
      '@typescript-eslint/no-explicit-any': 'error',
      '@typescript-eslint/no-non-null-assertion': 'off',
      '@typescript-eslint/no-require-imports': 'error',
      '@typescript-eslint/no-unused-expressions': [
        'error',
        {
          allowShortCircuit: true,
          allowTaggedTemplates: true,
          allowTernary: true
        }
      ]
    }
  },
  {
    files: ['*.js', '*.mjs'],
    rules: {
      '@typescript-eslint/explicit-function-return-type': 'off'
    }
  }
)