Function createFiberRoot

docs/index.js:17867–17907

(
  containerInfo,
  tag,
  hydrate,
  initialChildren,
  hydrationCallbacks,
  isStrictMode,
  identifierPrefix,
  onUncaughtError,
  onCaughtError,
  onRecoverableError,
  transitionCallbacks,
  formState
)

  this.incompleteTransitions = new Map();
}
function createFiberRoot(
  containerInfo,
  tag,
  hydrate,
  initialChildren,
  hydrationCallbacks,
  isStrictMode,
  identifierPrefix,
  onUncaughtError,
  onCaughtError,
  onRecoverableError,
  transitionCallbacks,
  formState
) {
  containerInfo = new FiberRootNode(
    containerInfo,
    tag,
    hydrate,
    identifierPrefix,
    onUncaughtError,
    onCaughtError,
    onRecoverableError,
    formState
  );
  tag = 1;
  !0 === isStrictMode && (tag |= 24);
  isStrictMode = createFiberImplClass(3, null, null, tag);
  containerInfo.current = isStrictMode;
  isStrictMode.stateNode = containerInfo;
  tag = createCache();
  tag.refCount++;
  containerInfo.pooledCache = tag;
  tag.refCount++;
  isStrictMode.memoizedState = {
    element: initialChildren,
    isDehydrated: hydrate,
    cache: tag
  };
  initializeUpdateQueue(isStrictMode);
  return containerInfo;
}
function getContextForSubtree(parentComponent) {
  if (!parentComponent) return emptyContextObject;
  parentComponent = emptyContextObject;