Function mountStateImpl

docs/index.js:7603–7626

(initialState)

  null !== root && scheduleUpdateOnFiber(root, fiber, 2);
}
function mountStateImpl(initialState) {
  var hook = mountWorkInProgressHook();
  if ("function" === typeof initialState) {
    var initialStateInitializer = initialState;
    initialState = initialStateInitializer();
    if (shouldDoubleInvokeUserFnsInHooksDEV) {
      setIsStrictModeForDevtools(!0);
      try {
        initialStateInitializer();
      } finally {
        setIsStrictModeForDevtools(!1);
      }
    }
  }
  hook.memoizedState = hook.baseState = initialState;
  hook.queue = {
    pending: null,
    lanes: 0,
    dispatch: null,
    lastRenderedReducer: basicStateReducer,
    lastRenderedState: initialState
  };
  return hook;
}
function updateOptimisticImpl(hook, current, passthrough, reducer) {
  hook.baseState = passthrough;
  return updateReducerImpl(