Immer 적용시 에러 문의드립니다.

안녕하세요. React Immer 적용시 나타나는 에러인데

확인한번 부탁드려도 될까요?

Immer 적용 전까지 코드는 잘 돌아갔는데, 에러 추적이 힘드네요. 웹 팩 환경설정 문제일까요?

 immer module은 잘 설치되어 있습니다.

에러내용

소스코드

front/reducers/user.js

import produce from 'immer';

export const initialState = {
  logInLoading : false, // 로그인 시도중
  logInDone : false,
  loginError : null,

  logOutLoading : false, // 로그아웃 시도중
  logOutDone : false,
  logOutError : null,

  signUpLoading : false, // 회원가입 시도중
  signUpDone : false,
  signUpFailure : null,

  changeNicknameLoading : false, // 닉네임 변경 시도중
  changeNicknameDone : false,
  changeNicknameFailure : null,  

  me : null,
  signUpData : {},
  loginData : {},
};

const dummyUser = (data) => ({
  ...data,
  nickname : '제로초',
  id : 1,
  Posts : [{ id : 1}],
  Followings : [{nickname : 'AAA'}, {nickname : 'BBB'}, {nickname : 'CCC'}],
  Followers : [{nickname : 'AAA'}, {nickname : 'BBB'}, {nickname : 'CCC'}],
});

export const LOG_IN_REQUEST  = 'LOG_IN_REQUEST'; // 액션의 이름
export const LOG_IN_SUCCESS  = 'LOG_IN_SUCCESS'; 
export const LOG_IN_FAILURE  = 'LOG_IN_FAILURE'; 

export const LOG_OUT_REQUEST = 'LOG_OUT_REQUEST'; // 액션의 이름
export const LOG_OUT_SUCCESS = 'LOG_OUT_SUCCESS'; 
export const LOG_OUT_FAILURE = 'LOG_OUT_FAILURE';

export const SIGN_UP_REQUEST = 'SIGN_UP_REQUEST';
export const SIGN_UP_SUCCESS = 'SIGN_UP_SUCCESS';
export const SIGN_UP_FAILURE = 'SIGN_UP_FAILURE';

export const CHANGE_NICKNAME_REQUEST = 'CHANGE_NICKNAME_REQUEST';
export const CHANGE_NICKNAME_SUCCESS = 'CHANGE_NICKNAME_SUCCESS';
export const CHANGE_NICKNAME_FAILURE = 'CHANGE_NICKNAME_FAILURE';

export const FOLLOW_REQUEST = 'FOLLOW_REQUEST';
export const FOLLOW_SUCCESS = 'FOLLOW_SUCCESS';
export const FOLLOW_FAILURE = 'FOLLOW_FAILURE';

export const UNFOLLOW_REQUEST = 'UNFOLLOW_REQUEST';
export const UNFOLLOW_SUCCESS = 'UNFOLLOW_SUCCESS';
export const UNFOLLOW_FAILURE = 'UNFOLLOW_FAILURE';

export const ADD_POST_TO_ME = 'ADD_POST_TO_ME';
export const REMOVE_POST_OF_ME = 'REMOVE_POST_OF_ME';

export const signUpAction = (data) => {
  return {
    type: SIGN_UP_REQUEST,
    data,
  };
};

export const changeNicknameAction = (data) => {
  return {
    type: CHANGE_NICKNAME_REQUEST,
    data,
  };
};

export const loginRequestAction = (data) => {
  return {
    type: LOG_IN_REQUEST,
    data,
  }
};

export const logoutRequestAction = {
  type: LOG_OUT_REQUEST,
};


const reducer = (state = initialState, action) => produce(state, (draft) => {
    switch (action.type) {
      // 로그인
      case LOG_IN_REQUEST: 
        draft.state = true;
        draft.loginError = null;
        draft.logInDone = false;
        break;
      case LOG_IN_SUCCESS: 
        draft.logInLoading = false;
        draft.logInDone = true;
        draft.me = dummyUser(action.data);
        break;
      case LOG_IN_FAILURE: 
        draft.logInLoading =  false;
        draft.loginError = action.error;
        break;

      // 로그아웃
      case LOG_OUT_REQUEST :       
        draft.logOutLoading =  true;
        draft.logOutError =  null;
        break;
      case LOG_OUT_SUCCESS : 
        draft.logOutLoading = false;
        draft.logOutDone = false;
        draft.me =  null;
        break;
      case LOG_OUT_FAILURE : 
        draft.logOutLoading =   false;
        draft.logOutError = action.error;
        break; 

      // 회원가입
      case SIGN_UP_REQUEST : 
          draft.signUpLoading = true;
          draft.signUpDone = false;
          draft.signUpError = null;
          break;
      case SIGN_UP_SUCCESS : 
          draft.signUpLoading =  false;
          draft.signUpDone =  true;
          break;
      case SIGN_UP_FAILURE : 
          draft.signUpLoading = false;
          draft.signUpData = action.error;     
          break;         
        
      // 닉네임 변경
      case CHANGE_NICKNAME_REQUEST : 
          draft.changeNicknameLoading= true;
          draft.changeNicknameDone= false;
          draft.changeNicknameError= null;
          break;
      case CHANGE_NICKNAME_SUCCESS : 
          draft.changeNicknameLoading = false;
          draft.changeNicknameDone =  true;
          break;
      case CHANGE_NICKNAME_FAILURE : 
          draft.changeNicknameLoading = false;
          draft.changeNicknameData =  action.error;
          break;
    
      // 게시글 등록시 사용자 dummy Data에 동기화
      case ADD_POST_TO_ME : 
        draft.me.Posts.unshift({ id : action.data})
        break;
        // return {
        //   ...state,
        //   me : {
        //     ...state.me
        //     Posts: [ { id.action.data}, ...state.me.Posts]
        //   }
        // }

      // 게시글 삭제
      case REMOVE_POST_OF_ME : 
        draft.me.Posts = draft.me.Posts.filter((v) => v.id !== action.data)
        break;
        // return  {
        //     ...state, 
        //     me : {
        //       ...state.me,
        //       Posts : state.me.Posts.filter((v) => v.id !== action.data)
        //     }
        // }

      default:  
        break;
      }
  });
  
  export default reducer;