TypeScript Utility Types

Sometimes you have a strict Interface, but you only need a few properties from it, or you want to make all the properties optional temporarily. TypeScript provides built-in Utility Types to transform your data structures without writing brand new ones from scratch.

1/* this makes an interface optional */
2interface User {
3  name: string;
4  age: number;
5}
6
7// Partial makes name and age optional
8type OptionalUser = Partial<User>;