我的reducer中已经有一个switch case语句。如何在reducer中添加额外的if条件？

const initialState = {
  count: 0,
};

const reducer = (state = initialState, action) => {
  switch (action.type) {
    case 'INCREMENT':
      return {
        ...state,
        count: state.count + 1,
      };
    case 'DECREMENT':
      return {
        ...state,
        count: state.count - 1,
      };
    default:
      return state;
  }
};

const reducer = (state = initialState, action) => {
  if (action.type === 'INCREMENT' && state.count >= 10) {
    // 添加额外的if条件
    console.log('Count cannot exceed 10');
    return state;
  }

  switch (action.type) {
    case 'INCREMENT':
      return {
        ...state,
        count: state.count + 1,
      };
    case 'DECREMENT':
      return {
        ...state,
        count: state.count - 1,
      };
    default:
      return state;
  }
};