asyncReducer.1.js

export default function asyncReducer(state = isLoading, { type, payload }) {
  switch (type) {
    case AJAX_CALL_BEGIN:
      if (payload === 'comments') {
        return { ...state, comments: 1 };
      }
      return { ...state, product: 1 };

    case AJAX_CALL_SUCCESS:
      if (payload === 'comments') {
        return { ...state, comments: 0 };
      }
      return { ...state, product: 0 };
    
    case AJAX_CALL_ERROR:
      if (payload.target === 'comments') {
        return { ...state, comments: 0, error: payload.eror };
      }
      return { ...state, product: 0, error: payload.error };
      
    default:
      return state;
  }
}