Function scheduleTaskForRootDuringMicrotask

docs/index.js:14902–14970

(root, currentTime)

  flushSyncWorkAcrossRoots_impl(syncTransitionLanes, !1);
}
function scheduleTaskForRootDuringMicrotask(root, currentTime) {
  for (
    var suspendedLanes = root.suspendedLanes,
      pingedLanes = root.pingedLanes,
      expirationTimes = root.expirationTimes,
      lanes = root.pendingLanes & -62914561;
    0 < lanes;

  ) {
    var index$5 = 31 - clz32(lanes),
      lane = 1 << index$5,
      expirationTime = expirationTimes[index$5];
    if (-1 === expirationTime) {
      if (0 === (lane & suspendedLanes) || 0 !== (lane & pingedLanes))
        expirationTimes[index$5] = computeExpirationTime(lane, currentTime);
    } else expirationTime <= currentTime && (root.expiredLanes |= lane);
    lanes &= ~lane;
  }
  currentTime = workInProgressRoot;
  suspendedLanes = workInProgressRootRenderLanes;
  suspendedLanes = getNextLanes(
    root,
    root === currentTime ? suspendedLanes : 0
  );
  pingedLanes = root.callbackNode;
  if (
    0 === suspendedLanes ||
    (root === currentTime && 2 === workInProgressSuspendedReason) ||
    null !== root.cancelPendingCommit
  )
    return (
      null !== pingedLanes &&
        null !== pingedLanes &&
        cancelCallback$1(pingedLanes),
      (root.callbackNode = null),
      (root.callbackPriority = 0)
    );
  if (
    0 === (suspendedLanes & 3) ||
    checkIfRootIsPrerendering(root, suspendedLanes)
  ) {
    currentTime = suspendedLanes & -suspendedLanes;
    if (currentTime === root.callbackPriority) return currentTime;
    null !== pingedLanes && cancelCallback$1(pingedLanes);
    switch (lanesToEventPriority(suspendedLanes)) {
      case 2:
      case 8:
        suspendedLanes = UserBlockingPriority;
        break;
      case 32:
        suspendedLanes = NormalPriority$1;
        break;
      case 268435456:
        suspendedLanes = IdlePriority;
        break;
      default:
        suspendedLanes = NormalPriority$1;
    }