Function mountReducer

docs/external/js/react-dom.development.js:15151–15170

(reducer, initialArg, init)

  }

  function mountReducer(reducer, initialArg, init) {
    var hook = mountWorkInProgressHook();
    var initialState;

    if (init !== undefined) {
      initialState = init(initialArg);
    } else {
      initialState = initialArg;
    }

    hook.memoizedState = hook.baseState = initialState;
    var queue = hook.queue = {
      pending: null,
      dispatch: null,
      lastRenderedReducer: reducer,
      lastRenderedState: initialState
    };
    var dispatch = queue.dispatch = dispatchAction.bind(null, currentlyRenderingFiber$1, queue);
    return [hook.memoizedState, dispatch];
  }

  function updateReducer(reducer, initialArg, init) {
    var hook = updateWorkInProgressHook();