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

Maybe something like that:

type X = (A & Partial & Partial) | (Partial & B & Partial) | (Partial & Partial & C);
type LinkRestSource = X<{ model: string }, { rel: string }, { title: string }>
var d: LinkRestSource = {rel: 'sdf'};  

But it little bit messy :)

or

type Y = Partial & (A | B | C);