Use Record Types to Keep Values in Sync

Overview

When you have parallel data structures that need to stay synchronized - like a type and a configuration object for that type's properties - use Record<keyof T, V> to enforce that every property is accounted for. This technique ensures that when you add a new property to a type, you get a compile error reminding you to update related code.

This pattern is invaluable for optimization checks, property validators, and any code that needs to enumerate or configure all properties of a type.

When to Use This Skill

• Properties need synchronized configuration
• Adding new properties requires updates elsewhere
• Implementing shouldComponentUpdate-style optimizations
• Building property validators or transformers
• Maintaining parallel data structures

The Iron Rule

Use Record<keyof T, V> to enforce that all properties of T are accounted for in related configuration objects.