pruncalc/ts/cache.ts

const fetchCache = new Map<string, any>();
export async function cachedFetchJSON(url: string, options?: RequestInit): Promise<any> {
	if (fetchCache.has(url))
		return fetchCache.get(url);
	const response = await fetch(url, options).then((r) => r.json());
	fetchCache.set(url, response);
	return response;
}