TypeScript Best Practices

When to Apply

Apply these rules when:

• Writing new TypeScript code
• Reviewing TypeScript code
• Refactoring JavaScript to TypeScript
• Fixing type errors
• Optimizing type definitions

Core Rules

1. Avoid any - Use Proper Types

Never use any unless absolutely necessary. Instead:

• Use unknown for truly unknown types
• Use generics for flexible typing
• Use union types for multiple possibilities