Represent Adobe's array-like collections in TypeScript

Question

Adobe's ExtendScript features Number-indexed collections, for example the ArtLayers type. document.artLayers[0] might get me the first ArtLayer in the present document. ArtLayers also has a number of miscellaneous fields and methods. How can I best represent this type in a .d.ts file?

Answer 1

A definition for ExtendScript can already be found here. I looked at it and it does not seem perfect, but it could be a starting/reference point.

If I had to write a type as you describe it, I would probably use something like this:

interface ArtLayers {
    length: number;
    [index: number]: ArtLayer;
    parent: Document
    typename: string
    add(): void
    getByName(name: string): void
    removeAll(): void
}