Function Overloading

The shop needs a lookup that returns one product name for one ID and a list of names for a list of IDs. A union type on the parameter and on the return value seems to describe this, but it creates a problem for every caller.

type Product = { id: number; name: string; price: number };

const catalog: Product[] = [
    { id: 1, name: "Laptop", price: 1200 },
    { id: 2, name: "Phone", price: 800 },
    { id: 3, name: "Tablet", price: 500 },
];

function nameOf(id: number): string {
    return catalog.find((product) => product.id === id)?.name ?? "Unknown";
}