Given an array containing elements of two different entities:
interface A {
type: string
}
interface B {
type: number
}
const a = {} as A
const b = {} as B
const array = [a, b]
The array is of type (A | B)[]
How can we create a utility type that will return a typed array [A, B]?
If you're searching for it, what you need is known as a const assertion. To achieve this, simply cast the type of array using as const:
const array = [a, b] as const;
You can view a proof-of-concept demonstration on the TypeScript playground.
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