npm i @hazae41/glacier

Node Package 📦 • Read the docs 📚 • Next.js Example 🪣 • Expo Example 🪣 • Comparison with other libs 🌐

Philosophy 🧠

Glacier uses two new approaches compared to other data fetching libraries like swr or react-query:

1. Encapsulating key+fetcher+params in a single abstraction called schema.
2. Composing features with very simple hooks instead of having bloated configuration and unexpected behaviors.

function useAutoFetchMixture(query: Query) {
  useFetch(query) // Fetch on mount and url change
  useVisible(query) // Fetch when the page is focused
  useOnline(query) // Fetch when the browser is online
}

function useHelloWithAutoFetch() {
  const query = useQuery(createHelloQuery, [])
  useAutoFetchMixture(query)
  return query
}

function MyApp() {
  const { data, error } = useHelloWithAutoFetch()

  if (error != null)
    return <MyError error={error} />
  if (data == null)
    return <MyLoading />
  return <MyPage data={data} />
}

Features 🔥

• 100% TypeScript and ESM
• No external dependency
• Composition-based hooks
• Rust-like patterns
• Transport agnostic (REST, GraphQL, WebSocket)
• Storage agnostic (IndexedDB, localStorage)
• Works in a Service Worker or in a serverless function
• Per-query, encrypted, garbage-collected, persistent storage
• Store normalization and indexes
• Concurrent and multi-step optimistic states
• Request deduplication, cooldown, timeout, cancellation, expiration, and retrying
• Automatic refetching based on various signals
• Page-based and cursor-based pagination
• SSR & ISR support
• React Suspense support
• React Native support