Storefront calls

declare function storefrontCall<T>(
  query: string,
  properties?: object
): Promise<GraphQLResponse<T>>;

const result = await storefrontCall<{ product: { id: string; title: string } | null }>(
  `query Product($id: ID!) { product(id: $id) { id title } }`,
  { id: "gid://shopify/Product/123" }
);

interface GraphQLResponse<T> {
  data: T;
  extensions: object | undefined;
  errors: object[] | undefined;
}