text: const initialState = {
   scrollPosY: 0,
  }
  
  const pageScrollY = ( state = initialState, action ) => {
    const payload = action.payload;
    switch (action.type) {
      case 'PAGE_SCROLL_Y':
        return { scrollPosY: payload };
      default: return state;
    }
  };
  
  export default pageScrollY;
  