Function scheduleUpdateOnFiber

docs/external/js/react-dom.development.js:21298–21357

(fiber, expirationTime)

    return expirationTime;
  }
  function scheduleUpdateOnFiber(fiber, expirationTime) {
    checkForNestedUpdates();
    warnAboutRenderPhaseUpdatesInDEV(fiber);
    var root = markUpdateTimeFromFiberToRoot(fiber, expirationTime);

    if (root === null) {
      warnAboutUpdateOnUnmountedFiberInDEV(fiber);
      return;
    }

    checkForInterruption(fiber, expirationTime);
    recordScheduleUpdate(); // TODO: computeExpirationForFiber also reads the priority. Pass the
    // priority as an argument to that function and this one.

    var priorityLevel = getCurrentPriorityLevel();

    if (expirationTime === Sync) {
      if ( // Check if we're inside unbatchedUpdates
      (executionContext & LegacyUnbatchedContext) !== NoContext && // Check if we're not already rendering
      (executionContext & (RenderContext | CommitContext)) === NoContext) {
        // Register pending interactions on the root to avoid losing traced interaction data.
        schedulePendingInteractions(root, expirationTime); // This is a legacy edge case. The initial mount of a ReactDOM.render-ed
        // root inside of batchedUpdates should be synchronous, but layout updates
        // should be deferred until the end of the batch.

        performSyncWorkOnRoot(root);
      } else {
        ensureRootIsScheduled(root);
        schedulePendingInteractions(root, expirationTime);

        if (executionContext === NoContext) {
          // Flush the synchronous work now, unless we're already working or inside
          // a batch. This is intentionally inside scheduleUpdateOnFiber instead of
          // scheduleCallbackForFiber to preserve the ability to schedule a callback
          // without immediately flushing it. We only do this for user-initiated
          // updates, to preserve historical behavior of legacy mode.
          flushSyncCallbackQueue();
        }
      }
    } else {
      ensureRootIsScheduled(root);
      schedulePendingInteractions(root, expirationTime);
    }

    if ((executionContext & DiscreteEventContext) !== NoContext && ( // Only updates at user-blocking priority or greater are considered
    // discrete, even inside a discrete event.
    priorityLevel === UserBlockingPriority$1 || priorityLevel === ImmediatePriority)) {
      // This is the result of a discrete event. Track the lowest priority
      // discrete update per root so we can flush them early, if needed.
      if (rootsWithPendingDiscreteUpdates === null) {
        rootsWithPendingDiscreteUpdates = new Map([[root, expirationTime]]);
      } else {
        var lastDiscreteTime = rootsWithPendingDiscreteUpdates.get(root);

        if (lastDiscreteTime === undefined || lastDiscreteTime > expirationTime) {
          rootsWithPendingDiscreteUpdates.set(root, expirationTime);
        }
      }