text: const initState = {
    count: 1,
  }
  
  export default (state, action) => {
    console.log('tradeReducer ...')
    if (!state) {
      state = initState
    }
    switch (action.type) {
      case 'COUNT_INCREASE':
        return {
          ...state,
          count: state.count + 1,
        }
      default:
        return state
    }
  }