eslint-config-janus

An opinionated ESLint configuration for modern JavaScript and TypeScript projects using ESLint 9+ flat config.

Requirements

• Node.js >= 22.0.0
• npm >= 10.0.0
• ESLint >= 9.9.0

Installation

npm install --save-dev eslint-config-janus

Usage

// eslint.config.js
import janus from 'eslint-config-janus/js'

export default janus

Available Configs

• eslint-config-janus/js - JavaScript
• eslint-config-janus/node - Node.js
• eslint-config-janus/browser - Browser
• eslint-config-janus/ts - TypeScript
• eslint-config-janus/react - React
• eslint-config-janus/jest - Jest
• eslint-config-janus/mocha - Mocha
• eslint-config-janus/lit - Lit
• eslint-config-janus/array - Array rules
• eslint-config-janus/promise - Promise rules
• eslint-config-janus/security - Security rules

Key Features

• No var, prefer const
• No floating promises
• Tab indentation, single quotes, no semicolons
• Security checks (eval, buffer, child process)
• Array and promise best practices
• React prop validation and optimization

Extending

import janus from 'eslint-config-janus/js'

export default [
  ...janus,
  {
    rules: {
      'no-console': 'warn'
    }
  }
]

License

LGPL-3.0-or-later

Author

jonkee