Prefer ECMAScript Features to TypeScript Features

Overview

TypeScript includes features like enum and namespace that are specific to TypeScript and don't exist in JavaScript. Prefer standard ECMAScript features when possible - they're more portable, better understood by the JavaScript ecosystem, and won't lock you into TypeScript-specific patterns.

This doesn't mean avoid TypeScript entirely - use its type system fully. But for runtime features, prefer standard JavaScript.

When to Use This Skill

• Choosing between TypeScript and ECMAScript features
• Writing portable code that might be used without TypeScript
• Considering enum, namespace, or parameter properties
• Targeting multiple JavaScript environments
• Writing library code for broad consumption

The Iron Rule

Prefer standard ECMAScript features over TypeScript-specific runtime features. Use TypeScript for types, JavaScript for runtime behavior.