Function updateSyncExternalStore

dash/deps/react-dom@18.3.1.js:16045–16099

(subscribe, getSnapshot, getServerSnapshot)

  }

  function updateSyncExternalStore(subscribe, getSnapshot, getServerSnapshot) {
    var fiber = currentlyRenderingFiber$1;
    var hook = updateWorkInProgressHook(); // Read the current snapshot from the store on every render. This breaks the
    // normal rules of React, and only works because store updates are
    // always synchronous.

    var nextSnapshot = getSnapshot();

    {
      if (!didWarnUncachedGetSnapshot) {
        var cachedSnapshot = getSnapshot();

        if (!objectIs(nextSnapshot, cachedSnapshot)) {
          error('The result of getSnapshot should be cached to avoid an infinite loop');

          didWarnUncachedGetSnapshot = true;
        }
      }
    }

    var prevSnapshot = hook.memoizedState;
    var snapshotChanged = !objectIs(prevSnapshot, nextSnapshot);

    if (snapshotChanged) {
      hook.memoizedState = nextSnapshot;
      markWorkInProgressReceivedUpdate();
    }

    var inst = hook.queue;
    updateEffect(subscribeToStore.bind(null, fiber, inst, subscribe), [subscribe]); // Whenever getSnapshot or subscribe changes, we need to check in the
    // commit phase if there was an interleaved mutation. In concurrent mode
    // this can happen all the time, but even in synchronous mode, an earlier
    // effect may have mutated the store.

    if (inst.getSnapshot !== getSnapshot || snapshotChanged || // Check if the susbcribe function changed. We can save some memory by
    // checking whether we scheduled a subscription effect above.
    workInProgressHook !== null && workInProgressHook.memoizedState.tag & HasEffect) {
      fiber.flags |= Passive;
      pushEffect(HasEffect | Passive$1, updateStoreInstance.bind(null, fiber, inst, nextSnapshot, getSnapshot), undefined, null); // Unless we're rendering a blocking lane, schedule a consistency check.
      // Right before committing, we will walk the tree and check if any of the
      // stores were mutated.

      var root = getWorkInProgressRoot();

      if (root === null) {
        throw new Error('Expected a work-in-progress root. This is a bug in React. Please file an issue.');
      }

      if (!includesBlockingLane(root, renderLanes)) {
        pushStoreConsistencyCheck(fiber, getSnapshot, nextSnapshot);
      }
    }

    return nextSnapshot;
  }

  function pushStoreConsistencyCheck(fiber, getSnapshot, renderedSnapshot) {
    fiber.flags |= StoreConsistency;