How to create a Partial-like that requires a single property to be set

Question

We have a structure that is like the following:

export type LinkRestSource = {
    model: string;
    rel?: string;
    title?: string;
} | {
    model?: str         


        

Answer 1

There's another solution if you know which properties you want.

AtLeast = Partial & Pick

This would also allow you to lock in multiple keys of a type, e.g. AtLeast.