recursivelyTraverseAtomicPassiveEffects() — react Function Reference

Source Code

packages/react-reconciler/src/ReactFiberCommitWork.js lines 4457–4502

function recursivelyTraverseAtomicPassiveEffects(
  finishedRoot: FiberRoot,
  parentFiber: Fiber,
  committedLanes: Lanes,
  committedTransitions: Array<Transition> | null,
  endTime: number, // Profiling-only. The start time of the next Fiber or root completion.
) {
  // "Atomic" effects are ones that need to fire on every commit, even during
  // pre-rendering. We call this function when traversing a hidden tree whose
  // regular effects are currently disconnected.
  // TODO: Add special flag for atomic effects
  if (
    parentFiber.subtreeFlags & PassiveMask ||
    (enableProfilerTimer &&
      enableComponentPerformanceTrack &&
      parentFiber.actualDuration !== 0 &&
      (parentFiber.alternate === null ||
        parentFiber.alternate.child !== parentFiber.child))
  ) {
    let child = parentFiber.child;
    while (child !== null) {
      if (enableProfilerTimer && enableComponentPerformanceTrack) {
        const nextSibling = child.sibling;
        commitAtomicPassiveEffects(
          finishedRoot,
          child,
          committedLanes,
          committedTransitions,
          nextSibling !== null
            ? ((nextSibling.actualStartTime: any): number)
            : endTime,
        );
        child = nextSibling;
      } else {
        commitAtomicPassiveEffects(
          finishedRoot,
          child,
          committedLanes,
          committedTransitions,
          endTime,
        );
        child = child.sibling;
      }
    }
  }
}