What are custom utility types in TypeScript?

What are custom utility types in TypeScript?

Custom utility types in TypeScript are types that you create to manipulate existing types, enhancing type safety and reusability.

Can you give me an example of a custom utility type?

Sure! A common example is creating a Partial<T> type that makes all properties of type T optional.

How do I implement a custom utility type?

You can implement it using TypeScript's mapped types. For instance, type MyPartial<T> = { [K in keyof T]?: T[K] }; makes all properties optional.

What are some other built-in utility types?

Some built-in utility types include Pick, Omit, Record, and Readonly, each serving different purposes.