recursivelyTraversePassiveMountEffects() — react Function Reference

Source Code

packages/react-reconciler/src/ReactFiberCommitWork.js lines 3512–3567

function recursivelyTraversePassiveMountEffects(
  root: FiberRoot,
  parentFiber: Fiber,
  committedLanes: Lanes,
  committedTransitions: Array<Transition> | null,
  endTime: number, // Profiling-only. The start time of the next Fiber or root completion.
) {
  const isViewTransitionEligible =
    enableViewTransition &&
    includesOnlyViewTransitionEligibleLanes(committedLanes);
  // TODO: We could optimize this by marking these with the Passive subtree flag in the render phase.
  const subtreeMask = isViewTransitionEligible
    ? PassiveTransitionMask
    : PassiveMask;
  if (
    parentFiber.subtreeFlags & subtreeMask ||
    // If this subtree rendered with profiling this commit, we need to visit it to log it.
    (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;
        commitPassiveMountOnFiber(
          root,
          child,
          committedLanes,
          committedTransitions,
          nextSibling !== null
            ? ((nextSibling.actualStartTime: any): number)
            : endTime,
        );
        child = nextSibling;
      } else {
        commitPassiveMountOnFiber(
          root,
          child,
          committedLanes,
          committedTransitions,
          0,
        );
        child = child.sibling;
      }
    }
  } else if (isViewTransitionEligible) {
    // We are inside an updated subtree. Any mutations that affected the
    // parent HostInstance's layout or set of children (such as reorders)
    // might have also affected the positioning or size of the inner
    // ViewTransitions. Therefore we need to restore those too.
    restoreNestedViewTransitions(parentFiber);
  }
}