Redux-toolkit：state 是 createSlice reducer 中的代理

Question

我正在尝试在切片缩减器内的状态数组中附加/更新一些数据，但是当我尝试 console.log 我感兴趣的状态的 .projects 数组时，我只需获得 javascript 代理。这是怎么回事（我做错了什么）？

import { createSlice } from '@reduxjs/toolkit';

const initialState = {
  projects: [],
};

const projectsSlice = createSlice({
  name: 'projectsSlice',
  initialState: { ...initialState },
  reducers: {
    addProject(state, action) {
      const { project } = action.payload;
      const newProjects = [project, ...state.projects];

      console.group('add project');
      console.log('project: ', project);
      console.log('state projects: ', state.projects);
      console.log('newProjects: ', newProjects);
      console.groupEnd();

      state.projects = newProjects;
    },
    setProjects(state, action) {
      const { projects } = action.payload;
      state.projects = projects;
    },
    removeProject(state, action) {
      const { projectId } = action.payload;
      const newProjects = [...state.projects].filter((project) => project.id !== projectId);
      state.projects = newProjects;
    },
    updateProject(state, action) {
      const { project } = action.payload;
      const projectIndex = state.projects.findIndex((stateProject) => stateProject.id === project.id);
      const newProjects = [...state.projects].splice(projectIndex, 1, project);

      console.group('updateProject');
      console.log('project: ', project);
      console.log('projectIndex: ', projectIndex);
      console.log('state projects: ', state.projects);
      console.log('newProjects: ', newProjects);
      console.groupEnd();

      state.projects = newProjects;
    },
  },
});

export const { addProject, removeProject, updateProject, setProjects } = projectsSlice.actions;

export default projectsSlice.reducer;

Answer 1

代理是你可以在那个减速器中改变状态并在你的状态中得到一个不可变副本的原因——但是浏览器在记录代理方面真的很糟糕。

per the docs,可以使用RTK&immer的current导出:

const slice = createSlice({
  name: 'todos',
  initialState: [{ id: 1, title: 'Example todo' }],
  reducers: {
    addTodo: (state, action) => {
      console.log('before', current(state))
      state.push(action.payload)
      console.log('after', current(state))
    },
  },
})

Answer 2

您需要使用电流

import { current } from '@reduxjs/toolkit'

然后，您可以达到当前状态并使用它们，之后，您可以将 return in reducer 发送到 return 新数据。

将看起来像这样：

const referralSlicer = createSlice({
name: 'referral',
initialState: {
  referrals: [],
  currentCard: 0,
} as IReferralSlicer,
reducers: {
  addReferrals(state, { payload }) {
    return {
      referrals: [...state.referrals, payload],
    }
  },
  deleteReferral(state, { payload }) {
    const currentState = current(state)

    return {
      ...currentState,
      referrals: currentState.referrals.splice(payload, 1),
    }
  },
  setCurrentCard(state, { payload }) {
    return {
      referrals: state.referrals,
      currentCard: payload,
    }
  },
},
})

Redux-toolkit：state 是 createSlice reducer 中的代理

Redux-toolkit: state is a proxy inside a createSlice reducer

javascript

redux

redux-toolkit