Readonly and Utility Types

TypeScript provides built-in Utility Types to transform shapes: Partial<T> makes all fields optional, Readonly<T> makes all fields immutable, Pick<T, Keys> selects specific fields, and Omit<T, Keys> removes specific fields.

How it reads

• Readonly<Flight> prevents writing to any property after creation
• Pick<Flight, 'id' | 'pilot'> creates a type containing only those fields

Cloud tip: Utility types save you from duplicating similar object shapes across your code.