TypeScript Utility Types

TypeScript ships with utility types that save you from writing complex generics.

Essential Utilities

// Make all properties optional
Partial<User>

// Pick specific properties
Pick<User, 'id' | 'name'>

// Make all properties readonly
Readonly<Config>

// Extract return type
ReturnType<typeof myFunction>

These cover 80% of type transformation needs. Master them before writing custom mapped types.