@lucid-softworks/async-cache

An async loading cache with concurrent-load deduplication, TTL, optional stale-while-revalidate, injected time, and explicit invalidation.

const cache = new AsyncCache<string, User>({
  ttl: 60_000,
  staleWhileRevalidate: 30_000,
});
const user = await cache.get(id, loadUser);

Failed foreground loads reject without caching. Failed background refreshes leave the stale entry untouched.