We have:

type test = {
  id: number;
  name: string;
};

const arr: test[] = [{ id: 1, name: 'test-1' }, { id: 2, name: 'test-2' }];

And I want to create a type from an array of objects:

type other = typeof arr[number]['name'];

const another: other = 'test-1'; // Should be 'test-1' | 'test-2' but it's string

If I remove the custom type of arr and use const assertion:

const arr = [{ id: 1, name: 'test-1' }, { id: 2, name: 'test-2' }] as const;

type other = typeof arr[number]['name'];

const another: other = 'test-2'; // Works!

It'll work, but I want to have a type for my arr too.

How can I create something like this:

type test = {
  id: number;
  name: string;
};

const arr: test[] = [
  { id: 1, name: 'test-1' },
  { id: 2, name: 'test-2' }
] as const;

type other = typeof arr[number]['name'];

const another: other = 'test-1';

I tried to use ReadonlyArray<test> but no luck!