⭐ If this plugin caught a real bug for you, star the repo — it's the signal that keeps these rules maintained.

Description

This plugin provides Modernization rules — prefer modern ES idioms over legacy patterns.

Philosophy

Interlace fosters strength through integration. Instead of stacking isolated rules, we interlace security directly into your workflow to create a resilient fabric of code. We believe tools should guide rather than gatekeep, providing educational feedback that strengthens the developer with every interaction.

Getting Started

• To check out the guide, visit eslint.interlace.tools. 📚
• 要查看中文 指南, 请访问 eslint.interlace.tools. 📚
• 가이드 문서는 eslint.interlace.tools에서 확인하실 수 있습니다. 📚
• ガイドは eslint.interlace.toolsでご確認ください。 📚
• Para ver la guía, visita eslint.interlace.tools. 📚
• للاطلاع على الدليل، قم بزيارة eslint.interlace.tools. 📚

npm install eslint-plugin-modernization --save-dev

⚙️ Configuration Presets

| Preset | Description | | :------------ | :----------------------------------------------- | | recommended | Balanced modernization for most projects | | strict | All rules as errors for aggressive modernization |

🏢 Usage Example

// eslint.config.js
import modernization from 'eslint-plugin-modernization';

export default [
  modernization.configs.recommended,

  // Or be strict about modernization
  // modernization.configs.strict,
];

Why These Rules?

no-instanceof-array

instanceof Array fails across different realms (iframes, workers). Array.isArray() is the correct, reliable check.

// ❌ Bad: Fails across realms
if (value instanceof Array) {
}

// ✅ Good: Works everywhere
if (Array.isArray(value)) {
}

prefer-at

Array.at() provides cleaner negative index access (ES2022+).

// ❌ Bad: Verbose negative index access
const last = arr[arr.length - 1];

// ✅ Good: Clean ES2022+ syntax
const last = arr.at(-1);

prefer-event-target

EventTarget is the native browser API and doesn't require Node.js polyfills.

// ❌ Bad: Requires polyfill in browsers
import { EventEmitter } from 'events';

// ✅ Good: Native browser API
const target = new EventTarget();

📦 Compatibility

| Package | Version | | :--- | :--- | | ESLint | ^8.0.0 \|\| ^9.0.0 \|\| ^10.0.0 | | Node.js | >=18.0.0 |

See the ESLint Version Support Policy — current ecosystem share data, the 20% gate, and the forward-looking exception that covers v10.

Rules

Legend

| Icon | Description | | :---: | :--- | | 💼 | Recommended: Included in the recommended preset. | | ⚠️ | Warns: Set to warn in recommended preset. | | 🔧 | Auto-fixable: Automatically fixable by the --fix CLI option. | | 💡 | Suggestions: Providing code suggestions in IDE. | | 🚫 | Deprecated: This rule is deprecated. | | 🟢 | Type-unaware: AST-only, runs in oxlint JS-plugin tier. | | 🟡 | Type-aware (refining): pure-AST primary path; types refine precision. | | 🟠 | Type-aware (graceful): requires TS program; silent without it. |

| Rule | CWE | OWASP | CVSS | Description | 🧠 | 💼 | ⚠️ | 🔧 | 💡 | 🚫 | | :--- | :---: | :---: | :---: | :--- | :---: | :---: | :---: | :---: | :---: | :---: | | no-instanceof-array | | | | Prefer Array.isArray() over instanceof Array for reliable type checking across different JavaScript realms… | 🟢 | | | | 💡 | | | prefer-at | | | | Prefer using Array.at() for accessing elements, especially with negative indices | 🟢 | | | | 💡 | | | prefer-event-target | | | | Prefer EventTarget over EventEmitter for isomorphic code | 🟢 | | | | 💡 | | | prefer-template-literal | | | | Prefer template literals over string concatenation with runtime values | 🟢 | | | | | |

🔗 Related ESLint Plugins

Part of the Interlace ESLint Ecosystem — AI-native security plugins with LLM-optimized error messages:

| Plugin | Downloads | Description | | :--- | :---: | :--- | | eslint-plugin-secure-coding | | General security rules & OWASP guidelines. | | eslint-plugin-pg | | PostgreSQL security & best practices. | | eslint-plugin-node-security | | Node.js core-module security (fs, child_process, vm, crypto, Buffer). | | eslint-plugin-jwt | | JWT security & best practices. | | eslint-plugin-browser-security | | Browser-specific security & XSS prevention. | | eslint-plugin-express-security | | Express.js security hardening rules. | | eslint-plugin-lambda-security | | AWS Lambda security best practices. | | eslint-plugin-nestjs-security | | NestJS security rules & patterns. | | eslint-plugin-mongodb-security | | MongoDB security best practices. | | eslint-plugin-vercel-ai-security | | Vercel AI SDK security hardening. | | eslint-plugin-import-next | | Next-gen import sorting & architecture. |

⭐ Support & follow

If this plugin caught a real bug for you, star the repo — stars are the signal that keeps the Interlace ESLint ecosystem maintained — and follow the writeups on Dev.to for the benchmarks and security research behind these rules.

📄 License

MIT © Ofri Peretz