v1.1.0

New:

• Provide a custom cache-key function. #15 — Since JavaScript does not use value equality, but fetch keys are often treated as values, this allows for a custom function to be provided to produce a cache-key for any load-key. Example:

  var loader = new DataLoader(keys => promiseToGetKeys(keys), { cacheKeyFn: key => key._id });
  var first = loader.load({ _id: 'abc123' });
  var second = loader.load({ _id: 'abc123' });
  assert(first === second);

• Provide a custom cache instance. #17 — By default, DataLoader uses a Map as a cache. However this simple cache does not support anything like TTL or a cache eviction policy. Now you may provide any object which implements the Map API to use as a cache. Example:

  var loader = new DataLoader(keys => promiseToGetKeys(keys), { cacheMap: new LRUCacheMap() });