Lists

// Creating a custom object type to be used inside a list in another type:
const Animal = t.object({
  name: 'Animal',
  fields: {
    id: t.id,
    name: t.string.nullable,
    age: t.int,
    species: t.string,
  },
});

// Now, we'll use the Animal type within a list:
const Person = t.object({
  name: 'User',
  fields: {
    id: t.id,
    favoriteFoods: t.list(t.string),
    pets: t.list(Animal),
  },
});

/** TypeScript */
type Person = {
  id: string | number;
  favoriteFoods: Array<string>;
  pets: Array<{
    id: string | number;
    name: string | null | undefined;
    age: Int;
    species: string;
  }>;
};

# GraphQL:

type Person {
  id: ID!
  favoriteFoods: [String!]!
  pets: [Animal!]!
}