Function markRootFinished

packages/react-reconciler/src/ReactFiberLane.js:889–989

(
  root: FiberRoot,
  finishedLanes: Lanes,
  remainingLanes: Lanes,
  spawnedLane: Lane,
  updatedLanes: Lanes,
  suspendedRetryLanes: Lanes,
)

}

export function markRootFinished(
  root: FiberRoot,
  finishedLanes: Lanes,
  remainingLanes: Lanes,
  spawnedLane: Lane,
  updatedLanes: Lanes,
  suspendedRetryLanes: Lanes,
) {
  const previouslyPendingLanes = root.pendingLanes;
  const noLongerPendingLanes = previouslyPendingLanes & ~remainingLanes;

  root.pendingLanes = remainingLanes;

  // Let's try everything again
  root.suspendedLanes = NoLanes;
  root.pingedLanes = NoLanes;
  root.warmLanes = NoLanes;

  if (enableDefaultTransitionIndicator) {
    root.indicatorLanes &= remainingLanes;
  }

  root.expiredLanes &= remainingLanes;

  root.entangledLanes &= remainingLanes;

  root.errorRecoveryDisabledLanes &= remainingLanes;
  root.shellSuspendCounter = 0;

  const entanglements = root.entanglements;
  const expirationTimes = root.expirationTimes;
  const hiddenUpdates = root.hiddenUpdates;

  // Clear the lanes that no longer have pending work
  let lanes = noLongerPendingLanes;
  while (lanes > 0) {
    const index = pickArbitraryLaneIndex(lanes);
    const lane = 1 << index;

    entanglements[index] = NoLanes;
    expirationTimes[index] = NoTimestamp;

    const hiddenUpdatesForLane = hiddenUpdates[index];
    if (hiddenUpdatesForLane !== null) {
      hiddenUpdates[index] = null;
      // "Hidden" updates are updates that were made to a hidden component. They
      // have special logic associated with them because they may be entangled
      // with updates that occur outside that tree. But once the outer tree
      // commits, they behave like regular updates.
      for (let i = 0; i < hiddenUpdatesForLane.length; i++) {
        const update = hiddenUpdatesForLane[i];
        if (update !== null) {
          update.lane &= ~OffscreenLane;
        }
      }
    }

    lanes &= ~lane;