@rest-hooks/core NPM | npm.io

5.2.1 • Published 8 months ago

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Weekly downloads

19,877

License

Apache-2.0

Repository

Last release

8 months ago

Reducer/flux normalized, framework-agnostic data store. Includes managers/middleware, global referential equality guarantees, automatic expiry policies, data normalization. Consumes TypeScript Standard Endpoints

📖Read The Docs | 🏁Getting Started | 🎮Todo Demo | 🎮Github Demo

Framework Implementations

Sample React Hook suspense implementation

function useSuspense(endpoint, ...args)
  const state = useCacheState();
  const controller = useController();

  const key = args[0] !== null ? endpoint.key(...args) : '';
  const cacheResults = key && state.results[key];
  const meta = state.meta[key];

  // Compute denormalized value
  const { data, expiryStatus, expiresAt } = useMemo(() => {
    return controller.getResponse(endpoint, ...args, state);
  }, [
    cacheResults,
    state.indexes,
    state.entities,
    state.entityMeta,
    meta,
    key,
  ]);

  const error = controller.getError(endpoint, ...args, state);

  // If we are hard invalid we must fetch regardless of triggering or staleness
  const forceFetch = expiryStatus === ExpiryStatus.Invalid;

  const maybePromise = useMemo(() => {
    // null params mean don't do anything
    if ((Date.now() <= expiresAt && !forceFetch) || !key) return;

    return controller.fetch(endpoint, ...args);
    // we need to check against serialized params, since params can change frequently
  }, [expiresAt, controller, key, forceFetch, state.lastReset]);

  // fully "valid" data will not suspend even if it is not fresh
  if (expiryStatus !== ExpiryStatus.Valid && maybePromise) {
    throw maybePromise;
  }

  if (error) throw error;

  return data;
}

data cache normalizr normalization flux fetch hook networking async typescript async data fetching data cache api client api normalized cache swr GraphQL query ios android web middleware websocket sse declarative scalable

@data-client/core

@everything-registry/sub-chunk-777 @rest-hooks/legacy @zalastax/nolb-_res

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