eslint.config.js

import js from '@eslint/js'
import globals from 'globals'

export default [
  js.configs.recommended,
  {
    ignores: [
      'node_modules',
      'coverage',
    ],
    languageOptions: {
      ecmaVersion: 'latest',
      sourceType: 'module',
      globals: {
        ...globals.builtin,
        ...globals.node,
        ...globals.mocha,
        ...globals.jasmine,
      },
    },
    rules: {
      indent: ['error', 2, {
        SwitchCase: 1,
      }],
      quotes: ['error', 'single', {
        allowTemplateLiterals: true,
      }],
      'brace-style': ['error', 'stroustrup', {
        allowSingleLine: false,
      }],
      curly: 'error',
      'comma-dangle': ['error', {
        functions: 'never',
        arrays: 'always-multiline',
        objects: 'always-multiline',
      }],
      'space-infix-ops': ['error'],
      'quote-props': ['error', 'as-needed'],
      'object-curly-spacing': ['error', 'never'],
      'space-before-blocks': 'error',
      'keyword-spacing': 'error',
      semi: ['error', 'never'],
      'eol-last': ['error', 'always'],
      'no-console': process.env.NODE_ENV === 'production' ? 'warn' : 'off',
      'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
      'no-empty': process.env.NODE_ENV === 'production' ? 'error' : 'warn',
      'no-empty-function': process.env.NODE_ENV === 'production' ? 'error' : 'warn',
      'no-unused-vars': process.env.NODE_ENV === 'production' ? 'error' : 'warn',
      'no-unreachable': process.env.NODE_ENV === 'production' ? 'error' : 'warn',
      'no-multiple-empty-lines': ['error', {
        max: 1, maxEOF: 0,
      }],
    },
  },
]