Typescript prepended union template literal types

I there a way to create literal string types from other string types with a prefix? Beter knowing there isn’t than dwendle on this idea.

type UserField = "id" | "name";
type PostField = "id" | "message" | ("author." + UserField); // Something like this?
let somePostFields: PostField[] = ["id", "message", "author.name"];

>Solution :

You can use the feature template literal types using string interpolation allowing union types to combine.

type UserField = "id" | "name";
type PostField = "id" | "message" | `author.${UserField}`;