Method for typing objects with allowed keys

Typing Objects with Records.ts

// Instead of typing an object like this:
interface Person {
    [key: string]: unknown
}

// Only allow certain keys
type AllowedKeys = 'name' | 'age';

type StrictPerson = Record<AllowedKeys, unknown>;
/**
equivalent to:
interface StrictPerson {
    name: unknown
    age: unknown
}
*/

// If later more keys are added to `AllowedKeys`, these typed objects will throw an error
const Human: StrictPerson = {
    name: 'Chris',
    age: 36,
}