Function updateDeferredValueImpl

docs/index.js:7991–8005

(hook, prevValue, value, initialValue)

  return initialValue;
}
function updateDeferredValueImpl(hook, prevValue, value, initialValue) {
  if (objectIs(value, prevValue)) return value;
  if (null !== currentTreeHiddenStackCursor.current)
    return (
      (hook = mountDeferredValueImpl(hook, value, initialValue)),
      objectIs(hook, prevValue) || (didReceiveUpdate = !0),
      hook
    );
  if (0 === (renderLanes & 42))
    return (didReceiveUpdate = !0), (hook.memoizedState = value);
  hook = requestDeferredLane();
  currentlyRenderingFiber$1.lanes |= hook;
  workInProgressRootSkippedLanes |= hook;
  return prevValue;
}
function startTransition(fiber, queue, pendingState, finishedState, callback) {
  var previousPriority = ReactDOMSharedInternals.p;
  ReactDOMSharedInternals.p =