Function createOrAttach

packages/core/src/render3/list_reconciliation.ts:369–382

(
  liveCollection: LiveCollection<T, V>,
  detachedItems: UniqueValueMultiKeyMap<unknown, T> | undefined,
  trackByFn: TrackByFunction<unknown>,
  index: number,
  value: V,
)

}

function createOrAttach<T, V>(
  liveCollection: LiveCollection<T, V>,
  detachedItems: UniqueValueMultiKeyMap<unknown, T> | undefined,
  trackByFn: TrackByFunction<unknown>,
  index: number,
  value: V,
) {
  if (!attachPreviouslyDetached(liveCollection, detachedItems, index, trackByFn(index, value))) {
    const newItem = liveCollection.create(index, value);
    liveCollection.attach(index, newItem);
  } else {
    liveCollection.updateValue(index, value);
  }
}

function initLiveItemsInTheFuture<T>(
  liveCollection: LiveCollection<unknown, unknown>,